drivers/staging/rtl8188eu/core/rtw_recv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _RTW_RECV_C_
   8
   9 #include <linux/ieee80211.h>
  10
  11 #include <osdep_service.h>
  12 #include <drv_types.h>
  13 #include <recv_osdep.h>
  14 #include <mlme_osdep.h>
  15 #include <mon.h>
  16 #include <wifi.h>
  17 #include <linux/vmalloc.h>
  18 #include <net/cfg80211.h>
  19
  20 #define ETHERNET_HEADER_SIZE    14      /*  Ethernet Header Length */
  21 #define LLC_HEADER_SIZE                 6       /*  LLC Header Length */
  22
  23 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
  24 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
  25
  26 static void rtw_signal_stat_timer_hdl(struct timer_list *t);
  27
  28 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
  29 {
  30         memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
  31
  32         spin_lock_init(&psta_recvpriv->lock);
  33
  34         _rtw_init_queue(&psta_recvpriv->defrag_q);
  35 }
  36
  37 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
  38 {
  39         int i;
  40
  41         struct recv_frame *precvframe;
  42
  43         int     res = _SUCCESS;
  44
  45         _rtw_init_queue(&precvpriv->free_recv_queue);
  46         _rtw_init_queue(&precvpriv->recv_pending_queue);
  47         _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
  48
  49         precvpriv->adapter = padapter;
  50
  51         precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
  52
  53         if (!precvpriv->pallocated_frame_buf)
  54                 return _FAIL;
  55
  56         precvframe = PTR_ALIGN(precvpriv->pallocated_frame_buf, RXFRAME_ALIGN_SZ);
  57
  58         for (i = 0; i < NR_RECVFRAME; i++) {
  59                 INIT_LIST_HEAD(&precvframe->list);
  60
  61                 list_add_tail(&precvframe->list,
  62                               &precvpriv->free_recv_queue.queue);
  63
  64                 precvframe->pkt = NULL;
  65
  66                 precvframe->adapter = padapter;
  67                 precvframe++;
  68         }
  69         res = rtw_hal_init_recv_priv(padapter);
  70
  71         timer_setup(&precvpriv->signal_stat_timer, rtw_signal_stat_timer_hdl,
  72                     0);
  73
  74         precvpriv->signal_stat_sampling_interval = 1000; /* ms */
  75
  76         rtw_set_signal_stat_timer(precvpriv);
  77
  78         return res;
  79 }
  80
  81 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
  82 {
  83         struct adapter  *padapter = precvpriv->adapter;
  84
  85         rtw_free_uc_swdec_pending_queue(padapter);
  86
  87         vfree(precvpriv->pallocated_frame_buf);
  88
  89         rtw_hal_free_recv_priv(padapter);
  90 }
  91
  92 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
  93 {
  94         struct recv_frame *hdr;
  95
  96         hdr = list_first_entry_or_null(&pfree_recv_queue->queue,
  97                                        struct recv_frame, list);
  98         if (hdr)
  99                 list_del_init(&hdr->list);
 100
 101         return hdr;
 102 }
 103
 104 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 105 {
 106         struct recv_frame  *precvframe;
 107
 108         spin_lock_bh(&pfree_recv_queue->lock);
 109
 110         precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
 111
 112         spin_unlock_bh(&pfree_recv_queue->lock);
 113
 114         return precvframe;
 115 }
 116
 117 int rtw_free_recvframe(struct recv_frame *precvframe,
 118                        struct __queue *pfree_recv_queue)
 119 {
 120         if (!precvframe)
 121                 return _FAIL;
 122         if (precvframe->pkt) {
 123                 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
 124                 precvframe->pkt = NULL;
 125         }
 126
 127         spin_lock_bh(&pfree_recv_queue->lock);
 128
 129         list_del_init(&precvframe->list);
 130
 131         list_add_tail(&precvframe->list, get_list_head(pfree_recv_queue));
 132
 133         spin_unlock_bh(&pfree_recv_queue->lock);
 134
 135         return _SUCCESS;
 136 }
 137
 138 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 139 {
 140         list_del_init(&precvframe->list);
 141         list_add_tail(&precvframe->list, get_list_head(queue));
 142
 143         return _SUCCESS;
 144 }
 145
 146 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 147 {
 148         int ret;
 149
 150         spin_lock_bh(&queue->lock);
 151         ret = _rtw_enqueue_recvframe(precvframe, queue);
 152         spin_unlock_bh(&queue->lock);
 153
 154         return ret;
 155 }
 156
 157 /*
 158  * caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
 159  * pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
 160  *
 161  * using spinlock to protect
 162  *
 163  */
 164
 165 void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
 166 {
 167         struct recv_frame *hdr;
 168         struct list_head *plist, *phead;
 169
 170         spin_lock(&pframequeue->lock);
 171
 172         phead = get_list_head(pframequeue);
 173         plist = phead->next;
 174
 175         while (phead != plist) {
 176                 hdr = list_entry(plist, struct recv_frame, list);
 177
 178                 plist = plist->next;
 179
 180                 rtw_free_recvframe(hdr, pfree_recv_queue);
 181         }
 182
 183         spin_unlock(&pframequeue->lock);
 184 }
 185
 186 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
 187 {
 188         u32 cnt = 0;
 189         struct recv_frame *pending_frame;
 190
 191         while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
 192                 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
 193                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
 194                 cnt++;
 195         }
 196
 197         return cnt;
 198 }
 199
 200 static int recvframe_chkmic(struct adapter *adapter,
 201                             struct recv_frame *precvframe)
 202 {
 203         int     i, res = _SUCCESS;
 204         u32     datalen;
 205         u8      miccode[8];
 206         u8      bmic_err = false, brpt_micerror = true;
 207         u8      *pframe, *payload, *pframemic;
 208         u8      *mickey;
 209         struct  sta_info                *stainfo;
 210         struct  rx_pkt_attrib   *prxattrib = &precvframe->attrib;
 211         struct  security_priv   *psecuritypriv = &adapter->securitypriv;
 212
 213         struct mlme_ext_priv    *pmlmeext = &adapter->mlmeextpriv;
 214         struct mlme_ext_info    *pmlmeinfo = &pmlmeext->mlmext_info;
 215
 216         stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
 217
 218         if (prxattrib->encrypt == _TKIP_) {
 219                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 220                          ("\n %s: prxattrib->encrypt==_TKIP_\n", __func__));
 221                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 222                          ("\n %s: da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 223                           __func__, prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 224                           prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
 225
 226                 /* calculate mic code */
 227                 if (stainfo) {
 228                         if (is_multicast_ether_addr(prxattrib->ra)) {
 229                                 if (!psecuritypriv) {
 230                                         res = _FAIL;
 231                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 232                                                  ("\n %s: didn't install group key!!!!!!!!!!\n", __func__));
 233                                         DBG_88E("\n %s: didn't install group key!!!!!!!!!!\n", __func__);
 234                                         goto exit;
 235                                 }
 236                                 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
 237
 238                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 239                                          ("\n %s: bcmc key\n", __func__));
 240                         } else {
 241                                 mickey = &stainfo->dot11tkiprxmickey.skey[0];
 242                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 243                                          ("\n %s: unicast key\n", __func__));
 244                         }
 245
 246                         /* icv_len included the mic code */
 247                         datalen = precvframe->pkt->len - prxattrib->hdrlen -
 248                                   prxattrib->iv_len - prxattrib->icv_len - 8;
 249                         pframe = precvframe->pkt->data;
 250                         payload = pframe + prxattrib->hdrlen + prxattrib->iv_len;
 251
 252                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
 253                         rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
 254                                            (unsigned char)prxattrib->priority); /* care the length of the data */
 255
 256                         pframemic = payload + datalen;
 257
 258                         bmic_err = false;
 259
 260                         for (i = 0; i < 8; i++) {
 261                                 if (miccode[i] != *(pframemic + i)) {
 262                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 263                                                  ("%s: miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
 264                                                   __func__, i, miccode[i], i, *(pframemic + i)));
 265                                         bmic_err = true;
 266                                 }
 267                         }
 268
 269                         if (bmic_err) {
 270                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 271                                          ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 272                                          *(pframemic - 8), *(pframemic - 7), *(pframemic - 6),
 273                                          *(pframemic - 5), *(pframemic - 4), *(pframemic - 3),
 274                                          *(pframemic - 2), *(pframemic - 1)));
 275                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 276                                          ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 277                                          *(pframemic - 16), *(pframemic - 15), *(pframemic - 14),
 278                                          *(pframemic - 13), *(pframemic - 12), *(pframemic - 11),
 279                                          *(pframemic - 10), *(pframemic - 9)));
 280                                 {
 281                                         uint i;
 282
 283                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 284                                                  ("\n ======demp packet (len=%d)======\n",
 285                                                  precvframe->pkt->len));
 286                                         for (i = 0; i < precvframe->pkt->len; i += 8) {
 287                                                 RT_TRACE(_module_rtl871x_recv_c_,
 288                                                          _drv_err_,
 289                                                          ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
 290                                                          *(precvframe->pkt->data + i),
 291                                                          *(precvframe->pkt->data + i + 1),
 292                                                          *(precvframe->pkt->data + i + 2),
 293                                                          *(precvframe->pkt->data + i + 3),
 294                                                          *(precvframe->pkt->data + i + 4),
 295                                                          *(precvframe->pkt->data + i + 5),
 296                                                          *(precvframe->pkt->data + i + 6),
 297                                                          *(precvframe->pkt->data + i + 7)));
 298                                         }
 299                                         RT_TRACE(_module_rtl871x_recv_c_,
 300                                                  _drv_err_,
 301                                                  ("\n ====== demp packet end [len=%d]======\n",
 302                                                  precvframe->pkt->len));
 303                                         RT_TRACE(_module_rtl871x_recv_c_,
 304                                                  _drv_err_,
 305                                                  ("\n hrdlen=%d,\n",
 306                                                  prxattrib->hdrlen));
 307                                 }
 308
 309                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 310                                          ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
 311                                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 312                                          prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
 313
 314                                 /*  double check key_index for some timing issue , */
 315                                 /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
 316                                 if (is_multicast_ether_addr(prxattrib->ra) && prxattrib->key_index != pmlmeinfo->key_index)
 317                                         brpt_micerror = false;
 318
 319                                 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
 320                                         rtw_handle_tkip_mic_err(adapter, (u8)is_multicast_ether_addr(prxattrib->ra));
 321                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 322                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 323                                 } else {
 324                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 325                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 326                                 }
 327                                 res = _FAIL;
 328                         } else {
 329                                 /* mic checked ok */
 330                                 if (!psecuritypriv->bcheck_grpkey && is_multicast_ether_addr(prxattrib->ra)) {
 331                                         psecuritypriv->bcheck_grpkey = true;
 332                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
 333                                 }
 334                         }
 335                 } else {
 336                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 337                                  ("%s: rtw_get_stainfo==NULL!!!\n", __func__));
 338                 }
 339
 340                 skb_trim(precvframe->pkt, precvframe->pkt->len - 8);
 341         }
 342
 343 exit:
 344
 345         return res;
 346 }
 347
 348 /* decrypt and set the ivlen, icvlen of the recv_frame */
 349 static struct recv_frame *decryptor(struct adapter *padapter,
 350                                     struct recv_frame *precv_frame)
 351 {
 352         struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
 353         struct security_priv *psecuritypriv = &padapter->securitypriv;
 354         struct recv_frame *return_packet = precv_frame;
 355         u32      res = _SUCCESS;
 356
 357         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
 358
 359         if (prxattrib->encrypt > 0) {
 360                 u8 *iv = precv_frame->pkt->data + prxattrib->hdrlen;
 361
 362                 prxattrib->key_index = (((iv[3]) >> 6) & 0x3);
 363
 364                 if (prxattrib->key_index > WEP_KEYS) {
 365                         DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
 366
 367                         switch (prxattrib->encrypt) {
 368                         case _WEP40_:
 369                         case _WEP104_:
 370                                 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
 371                                 break;
 372                         case _TKIP_:
 373                         case _AES_:
 374                         default:
 375                                 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
 376                                 break;
 377                         }
 378                 }
 379         }
 380
 381         if ((prxattrib->encrypt > 0) && (prxattrib->bdecrypted == 0)) {
 382                 psecuritypriv->hw_decrypted = false;
 383
 384                 switch (prxattrib->encrypt) {
 385                 case _WEP40_:
 386                 case _WEP104_:
 387                         res = rtw_wep_decrypt(padapter, precv_frame);
 388                         break;
 389                 case _TKIP_:
 390                         res = rtw_tkip_decrypt(padapter, precv_frame);
 391                         break;
 392                 case _AES_:
 393                         res = rtw_aes_decrypt(padapter, precv_frame);
 394                         break;
 395                 default:
 396                         break;
 397                 }
 398         } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
 399                    (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
 400                         psecuritypriv->hw_decrypted = true;
 401
 402         if (res == _FAIL) {
 403                 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
 404                 return_packet = NULL;
 405         }
 406
 407         return return_packet;
 408 }
 409
 410 /* set the security information in the recv_frame */
 411 static struct recv_frame *portctrl(struct adapter *adapter,
 412                                    struct recv_frame *precv_frame)
 413 {
 414         u8   *psta_addr, *ptr;
 415         uint  auth_alg;
 416         struct recv_frame *pfhdr;
 417         struct sta_info *psta;
 418         struct sta_priv *pstapriv;
 419         struct recv_frame *prtnframe;
 420         u16     ether_type;
 421         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 422         struct rx_pkt_attrib *pattrib;
 423         __be16 be_tmp;
 424
 425         pstapriv = &adapter->stapriv;
 426
 427         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 428
 429         ptr = precv_frame->pkt->data;
 430         pfhdr = precv_frame;
 431         pattrib = &pfhdr->attrib;
 432         psta_addr = pattrib->ta;
 433         psta = rtw_get_stainfo(pstapriv, psta_addr);
 434
 435         prtnframe = NULL;
 436
 437         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########%s:adapter->securitypriv.dot11AuthAlgrthm=%d\n", __func__, adapter->securitypriv.dot11AuthAlgrthm));
 438
 439         if (auth_alg == 2) {
 440                 /* get ether_type */
 441                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE + pfhdr->attrib.iv_len;
 442                 memcpy(&be_tmp, ptr, 2);
 443                 ether_type = ntohs(be_tmp);
 444
 445                 if (psta && (psta->ieee8021x_blocked)) {
 446                         /* blocked */
 447                         /* only accept EAPOL frame */
 448                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########%s:psta->ieee8021x_blocked==1\n", __func__));
 449
 450                         if (ether_type == eapol_type) {
 451                                 prtnframe = precv_frame;
 452                         } else {
 453                                 /* free this frame */
 454                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 455                                 prtnframe = NULL;
 456                         }
 457                 } else {
 458                         /* allowed */
 459                         /* check decryption status, and decrypt the frame if needed */
 460                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########%s:psta->ieee8021x_blocked==0\n", __func__));
 461                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 462                                  ("%s:precv_frame->hdr.attrib.privacy=%x\n",
 463                                   __func__, precv_frame->attrib.privacy));
 464
 465                         if (pattrib->bdecrypted == 0)
 466                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("%s:prxstat->decrypted=%x\n", __func__, pattrib->bdecrypted));
 467
 468                         prtnframe = precv_frame;
 469                         /* check is the EAPOL frame or not (Rekey) */
 470                         if (ether_type == eapol_type) {
 471                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########%s:ether_type==0x888e\n", __func__));
 472                                 /* check Rekey */
 473
 474                                 prtnframe = precv_frame;
 475                         } else {
 476                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########%s:ether_type=0x%04x\n", __func__, ether_type));
 477                         }
 478                 }
 479         } else {
 480                 prtnframe = precv_frame;
 481         }
 482
 483         return prtnframe;
 484 }
 485
 486 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 487                         struct stainfo_rxcache *prxcache)
 488 {
 489         int tid = precv_frame->attrib.priority;
 490
 491         u16 seq_ctrl = ((precv_frame->attrib.seq_num & 0xffff) << 4) |
 492                 (precv_frame->attrib.frag_num & 0xf);
 493
 494         if (tid > 15) {
 495                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", __func__, seq_ctrl, tid));
 496
 497                 return _FAIL;
 498         }
 499
 500         if (1) {/* if (bretry) */
 501                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 502                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", __func__, seq_ctrl, tid, prxcache->tid_rxseq[tid]));
 503
 504                         return _FAIL;
 505                 }
 506         }
 507
 508         prxcache->tid_rxseq[tid] = seq_ctrl;
 509
 510         return _SUCCESS;
 511 }
 512
 513 static void process_pwrbit_data(struct adapter *padapter,
 514                                 struct recv_frame *precv_frame)
 515 {
 516 #ifdef CONFIG_88EU_AP_MODE
 517         unsigned char pwrbit;
 518         u8 *ptr = precv_frame->pkt->data;
 519         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 520         struct sta_priv *pstapriv = &padapter->stapriv;
 521         struct sta_info *psta = NULL;
 522
 523         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 524
 525         pwrbit = GetPwrMgt(ptr);
 526
 527         if (psta) {
 528                 if (pwrbit) {
 529                         if (!(psta->state & WIFI_SLEEP_STATE))
 530                                 stop_sta_xmit(padapter, psta);
 531                 } else {
 532                         if (psta->state & WIFI_SLEEP_STATE)
 533                                 wakeup_sta_to_xmit(padapter, psta);
 534                 }
 535         }
 536
 537 #endif
 538 }
 539
 540 static void process_wmmps_data(struct adapter *padapter,
 541                                struct recv_frame *precv_frame)
 542 {
 543 #ifdef CONFIG_88EU_AP_MODE
 544         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 545         struct sta_priv *pstapriv = &padapter->stapriv;
 546         struct sta_info *psta = NULL;
 547
 548         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 549
 550         if (!psta)
 551                 return;
 552
 553         if (!psta->qos_option)
 554                 return;
 555
 556         if (!(psta->qos_info & 0xf))
 557                 return;
 558
 559         if (psta->state & WIFI_SLEEP_STATE) {
 560                 u8 wmmps_ac = 0;
 561
 562                 switch (pattrib->priority) {
 563                 case 1:
 564                 case 2:
 565                         wmmps_ac = psta->uapsd_bk & BIT(1);
 566                         break;
 567                 case 4:
 568                 case 5:
 569                         wmmps_ac = psta->uapsd_vi & BIT(1);
 570                         break;
 571                 case 6:
 572                 case 7:
 573                         wmmps_ac = psta->uapsd_vo & BIT(1);
 574                         break;
 575                 case 0:
 576                 case 3:
 577                 default:
 578                         wmmps_ac = psta->uapsd_be & BIT(1);
 579                         break;
 580                 }
 581
 582                 if (wmmps_ac) {
 583                         if (psta->sleepq_ac_len > 0) {
 584                                 /* process received triggered frame */
 585                                 xmit_delivery_enabled_frames(padapter, psta);
 586                         } else {
 587                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 588                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 589                         }
 590                 }
 591         }
 592
 593 #endif
 594 }
 595
 596 static void count_rx_stats(struct adapter *padapter,
 597                            struct recv_frame *prframe,
 598                            struct sta_info *sta)
 599 {
 600         int     sz;
 601         struct sta_info         *psta = NULL;
 602         struct stainfo_stats    *pstats = NULL;
 603         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 604         struct recv_priv        *precvpriv = &padapter->recvpriv;
 605
 606         sz = prframe->pkt->len;
 607         precvpriv->rx_bytes += sz;
 608
 609         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 610
 611         if (!is_multicast_ether_addr(pattrib->dst))
 612                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 613
 614         if (sta)
 615                 psta = sta;
 616         else
 617                 psta = prframe->psta;
 618
 619         if (psta) {
 620                 pstats = &psta->sta_stats;
 621
 622                 pstats->rx_data_pkts++;
 623                 pstats->rx_bytes += sz;
 624         }
 625 }
 626
 627 static int sta2sta_data_frame(struct adapter *adapter,
 628                               struct recv_frame *precv_frame,
 629                               struct sta_info **psta)
 630 {
 631         int ret = _SUCCESS;
 632         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 633         struct  sta_priv *pstapriv = &adapter->stapriv;
 634         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 635         u8 *mybssid  = get_bssid(pmlmepriv);
 636         u8 *myhwaddr = myid(&adapter->eeprompriv);
 637         u8 *sta_addr = NULL;
 638         bool mcast = is_multicast_ether_addr(pattrib->dst);
 639
 640         if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 641             check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 642                 /*  filter packets that SA is myself or multicast or broadcast */
 643                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 644                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 645                         ret = _FAIL;
 646                         goto exit;
 647                 }
 648
 649                 if (memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && !mcast) {
 650                         ret = _FAIL;
 651                         goto exit;
 652                 }
 653
 654                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 655                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 656                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 657                         ret = _FAIL;
 658                         goto exit;
 659                 }
 660
 661                 sta_addr = pattrib->src;
 662         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 663                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 664                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 665                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 666                         ret = _FAIL;
 667                         goto exit;
 668                 }
 669                 sta_addr = pattrib->bssid;
 670         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 671                 if (mcast) {
 672                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 673                         if (!is_multicast_ether_addr(pattrib->bssid)) {
 674                                 ret = _FAIL;
 675                                 goto exit;
 676                         }
 677                 } else { /*  not mc-frame */
 678                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 679                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 680                                 ret = _FAIL;
 681                                 goto exit;
 682                         }
 683
 684                         sta_addr = pattrib->src;
 685                 }
 686         } else {
 687                 ret  = _FAIL;
 688         }
 689
 690         if (mcast)
 691                 *psta = rtw_get_bcmc_stainfo(adapter);
 692         else
 693                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 694
 695         if (!*psta) {
 696                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under %s ; drop pkt\n", __func__));
 697                 ret = _FAIL;
 698                 goto exit;
 699         }
 700
 701 exit:
 702         return ret;
 703 }
 704
 705 static int ap2sta_data_frame(struct adapter *adapter,
 706                              struct recv_frame *precv_frame,
 707                              struct sta_info **psta)
 708 {
 709         u8 *ptr = precv_frame->pkt->data;
 710         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 711         int ret = _SUCCESS;
 712         struct  sta_priv *pstapriv = &adapter->stapriv;
 713         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 714         u8 *mybssid  = get_bssid(pmlmepriv);
 715         u8 *myhwaddr = myid(&adapter->eeprompriv);
 716         bool mcast = is_multicast_ether_addr(pattrib->dst);
 717
 718         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) &&
 719             (check_fwstate(pmlmepriv, _FW_LINKED) ||
 720              check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 721                 /*  filter packets that SA is myself or multicast or broadcast */
 722                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 723                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 724                         ret = _FAIL;
 725                         goto exit;
 726                 }
 727
 728                 /*  da should be for me */
 729                 if (memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && !mcast) {
 730                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 731                                  (" %s:  compare DA fail; DA=%pM\n", __func__, (pattrib->dst)));
 732                         ret = _FAIL;
 733                         goto exit;
 734                 }
 735
 736                 /*  check BSSID */
 737                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 738                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 739                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 740                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 741                                  (" %s:  compare BSSID fail ; BSSID=%pM\n", __func__, (pattrib->bssid)));
 742                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 743
 744                         if (!mcast) {
 745                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 746                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 747                         }
 748
 749                         ret = _FAIL;
 750                         goto exit;
 751                 }
 752
 753                 if (mcast)
 754                         *psta = rtw_get_bcmc_stainfo(adapter);
 755                 else
 756                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 757
 758                 if (!*psta) {
 759                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 760                         ret = _FAIL;
 761                         goto exit;
 762                 }
 763
 764                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 765                 /*  */
 766
 767                 if (GetFrameSubType(ptr) & BIT(6)) {
 768                         /* No data, will not indicate to upper layer, temporily count it here */
 769                         count_rx_stats(adapter, precv_frame, *psta);
 770                         ret = RTW_RX_HANDLED;
 771                         goto exit;
 772                 }
 773         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 774                 /* Special case */
 775                 ret = RTW_RX_HANDLED;
 776                 goto exit;
 777         } else {
 778                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && !mcast) {
 779                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 780                         if (!*psta) {
 781                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 782
 783                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 784                         }
 785                 }
 786
 787                 ret = _FAIL;
 788         }
 789
 790 exit:
 791
 792         return ret;
 793 }
 794
 795 static int sta2ap_data_frame(struct adapter *adapter,
 796                              struct recv_frame *precv_frame,
 797                              struct sta_info **psta)
 798 {
 799         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 800         struct  sta_priv *pstapriv = &adapter->stapriv;
 801         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 802         u8 *ptr = precv_frame->pkt->data;
 803         unsigned char *mybssid  = get_bssid(pmlmepriv);
 804         int ret = _SUCCESS;
 805
 806         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 807                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 808                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 809                         ret = _FAIL;
 810                         goto exit;
 811                 }
 812
 813                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 814                 if (!*psta) {
 815                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 816                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 817
 818                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 819
 820                         ret = RTW_RX_HANDLED;
 821                         goto exit;
 822                 }
 823
 824                 process_pwrbit_data(adapter, precv_frame);
 825
 826                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE)
 827                         process_wmmps_data(adapter, precv_frame);
 828
 829                 if (GetFrameSubType(ptr) & BIT(6)) {
 830                         /* No data, will not indicate to upper layer, temporily count it here */
 831                         count_rx_stats(adapter, precv_frame, *psta);
 832                         ret = RTW_RX_HANDLED;
 833                         goto exit;
 834                 }
 835         } else {
 836                 u8 *myhwaddr = myid(&adapter->eeprompriv);
 837
 838                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
 839                         ret = RTW_RX_HANDLED;
 840                         goto exit;
 841                 }
 842                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 843                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 844                 ret = RTW_RX_HANDLED;
 845                 goto exit;
 846         }
 847
 848 exit:
 849
 850         return ret;
 851 }
 852
 853 static int validate_recv_ctrl_frame(struct adapter *padapter,
 854                                     struct recv_frame *precv_frame)
 855 {
 856 #ifdef CONFIG_88EU_AP_MODE
 857         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 858         struct sta_priv *pstapriv = &padapter->stapriv;
 859         u8 *pframe = precv_frame->pkt->data;
 860
 861         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
 862                 return _FAIL;
 863
 864         /* receive the frames that ra(a1) is my address */
 865         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
 866                 return _FAIL;
 867
 868         /* only handle ps-poll */
 869         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
 870                 u16 aid;
 871                 u8 wmmps_ac = 0;
 872                 struct sta_info *psta = NULL;
 873
 874                 aid = GetAid(pframe);
 875                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
 876
 877                 if ((!psta) || (psta->aid != aid))
 878                         return _FAIL;
 879
 880                 /* for rx pkt statistics */
 881                 psta->sta_stats.rx_ctrl_pkts++;
 882
 883                 switch (pattrib->priority) {
 884                 case 1:
 885                 case 2:
 886                         wmmps_ac = psta->uapsd_bk & BIT(0);
 887                         break;
 888                 case 4:
 889                 case 5:
 890                         wmmps_ac = psta->uapsd_vi & BIT(0);
 891                         break;
 892                 case 6:
 893                 case 7:
 894                         wmmps_ac = psta->uapsd_vo & BIT(0);
 895                         break;
 896                 case 0:
 897                 case 3:
 898                 default:
 899                         wmmps_ac = psta->uapsd_be & BIT(0);
 900                         break;
 901                 }
 902
 903                 if (wmmps_ac)
 904                         return _FAIL;
 905
 906                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
 907                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
 908                         psta->expire_to = pstapriv->expire_to;
 909                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
 910                 }
 911
 912                 if ((psta->state & WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap & BIT(psta->aid))) {
 913                         struct list_head *xmitframe_plist, *xmitframe_phead;
 914                         struct xmit_frame *pxmitframe = NULL;
 915
 916                         spin_lock_bh(&psta->sleep_q.lock);
 917
 918                         xmitframe_phead = get_list_head(&psta->sleep_q);
 919                         xmitframe_plist = xmitframe_phead->next;
 920
 921                         if (xmitframe_phead != xmitframe_plist) {
 922                                 pxmitframe = list_entry(xmitframe_plist, struct xmit_frame, list);
 923
 924                                 xmitframe_plist = xmitframe_plist->next;
 925
 926                                 list_del_init(&pxmitframe->list);
 927
 928                                 psta->sleepq_len--;
 929
 930                                 if (psta->sleepq_len > 0)
 931                                         pxmitframe->attrib.mdata = 1;
 932                                 else
 933                                         pxmitframe->attrib.mdata = 0;
 934
 935                                 pxmitframe->attrib.triggered = 1;
 936
 937                                 spin_unlock_bh(&psta->sleep_q.lock);
 938                                 if (rtw_hal_xmit(padapter, pxmitframe))
 939                                         rtw_os_xmit_complete(padapter, pxmitframe);
 940                                 spin_lock_bh(&psta->sleep_q.lock);
 941
 942                                 if (psta->sleepq_len == 0) {
 943                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
 944
 945                                         /* update BCN for TIM IE */
 946                                         /* update_BCNTIM(padapter); */
 947                                         update_beacon(padapter, _TIM_IE_, NULL, false);
 948                                 }
 949                         } else {
 950                                 if (pstapriv->tim_bitmap & BIT(psta->aid)) {
 951                                         if (psta->sleepq_len == 0) {
 952                                                 DBG_88E("no buffered packets to xmit\n");
 953
 954                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
 955                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
 956                                         } else {
 957                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
 958                                                 psta->sleepq_len = 0;
 959                                         }
 960
 961                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
 962
 963                                         /* update BCN for TIM IE */
 964                                         /* update_BCNTIM(padapter); */
 965                                         update_beacon(padapter, _TIM_IE_, NULL, false);
 966                                 }
 967                         }
 968
 969                         spin_unlock_bh(&psta->sleep_q.lock);
 970                 }
 971         }
 972
 973 #endif
 974
 975         return _FAIL;
 976 }
 977
 978 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
 979                                         struct recv_frame *precv_frame);
 980
 981 static int validate_recv_mgnt_frame(struct adapter *padapter,
 982                                     struct recv_frame *precv_frame)
 983 {
 984         struct sta_info *psta;
 985
 986         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+%s\n", __func__));
 987
 988         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
 989         if (!precv_frame) {
 990                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
 991                          ("%s: fragment packet\n", __func__));
 992                 return _SUCCESS;
 993         }
 994
 995         /* for rx pkt statistics */
 996         psta = rtw_get_stainfo(&padapter->stapriv,
 997                                GetAddr2Ptr(precv_frame->pkt->data));
 998         if (psta) {
 999                 psta->sta_stats.rx_mgnt_pkts++;
1000                 if (GetFrameSubType(precv_frame->pkt->data) == WIFI_BEACON) {
1001                         psta->sta_stats.rx_beacon_pkts++;
1002                 } else if (GetFrameSubType(precv_frame->pkt->data) == WIFI_PROBEREQ) {
1003                         psta->sta_stats.rx_probereq_pkts++;
1004                 } else if (GetFrameSubType(precv_frame->pkt->data) == WIFI_PROBERSP) {
1005                         if (!memcmp(padapter->eeprompriv.mac_addr,
1006                                     GetAddr1Ptr(precv_frame->pkt->data), ETH_ALEN))
1007                                 psta->sta_stats.rx_probersp_pkts++;
1008                         else if (is_multicast_ether_addr(GetAddr1Ptr(precv_frame->pkt->data)))
1009                                 psta->sta_stats.rx_probersp_bm_pkts++;
1010                         else
1011                                 psta->sta_stats.rx_probersp_uo_pkts++;
1012                 }
1013         }
1014
1015         mgt_dispatcher(padapter, precv_frame);
1016
1017         return _SUCCESS;
1018 }
1019
1020 static int validate_recv_data_frame(struct adapter *adapter,
1021                                     struct recv_frame *precv_frame)
1022 {
1023         u8 bretry;
1024         u8 *psa, *pda, *pbssid;
1025         struct sta_info *psta = NULL;
1026         u8 *ptr = precv_frame->pkt->data;
1027         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1028         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1029         int ret = _SUCCESS;
1030
1031         bretry = GetRetry(ptr);
1032         pda = get_da(ptr);
1033         psa = get_sa(ptr);
1034         pbssid = get_hdr_bssid(ptr);
1035
1036         if (!pbssid) {
1037                 ret = _FAIL;
1038                 goto exit;
1039         }
1040
1041         memcpy(pattrib->dst, pda, ETH_ALEN);
1042         memcpy(pattrib->src, psa, ETH_ALEN);
1043
1044         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1045
1046         switch (pattrib->to_fr_ds) {
1047         case 0:
1048                 memcpy(pattrib->ra, pda, ETH_ALEN);
1049                 memcpy(pattrib->ta, psa, ETH_ALEN);
1050                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1051                 break;
1052         case 1:
1053                 memcpy(pattrib->ra, pda, ETH_ALEN);
1054                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1055                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1056                 break;
1057         case 2:
1058                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1059                 memcpy(pattrib->ta, psa, ETH_ALEN);
1060                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1061                 break;
1062         case 3:
1063                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1064                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1065                 ret = _FAIL;
1066                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1067                 break;
1068         default:
1069                 ret = _FAIL;
1070                 break;
1071         }
1072
1073         if (ret == _FAIL)
1074                 goto exit;
1075         else if (ret == RTW_RX_HANDLED)
1076                 goto exit;
1077
1078         if (!psta) {
1079                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1080                 ret = _FAIL;
1081                 goto exit;
1082         }
1083
1084         /* psta->rssi = prxcmd->rssi; */
1085         /* psta->signal_quality = prxcmd->sq; */
1086         precv_frame->psta = psta;
1087
1088         pattrib->amsdu = 0;
1089         pattrib->ack_policy = 0;
1090         /* parsing QC field */
1091         if (pattrib->qos == 1) {
1092                 pattrib->priority = GetPriority((ptr + 24));
1093                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1094                 pattrib->amsdu = GetAMsdu((ptr + 24));
1095                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1096
1097                 if (pattrib->priority != 0 && pattrib->priority != 3)
1098                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1099         } else {
1100                 pattrib->priority = 0;
1101                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1102         }
1103
1104         if (pattrib->order)/* HT-CTRL 11n */
1105                 pattrib->hdrlen += 4;
1106
1107         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1108
1109         /*  decache, drop duplicate recv packets */
1110         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1111                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1112                 ret = _FAIL;
1113                 goto exit;
1114         }
1115
1116         if (pattrib->privacy) {
1117                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("%s:pattrib->privacy=%x\n", __func__, pattrib->privacy));
1118                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n ^^^^^^^^^^^is_multicast_ether_addr(pattrib->ra(0x%02x))=%d^^^^^^^^^^^^^^^6\n", pattrib->ra[0], is_multicast_ether_addr(pattrib->ra)));
1119
1120                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, is_multicast_ether_addr(pattrib->ra));
1121
1122                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1123
1124                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1125         } else {
1126                 pattrib->encrypt = 0;
1127                 pattrib->iv_len = 0;
1128                 pattrib->icv_len = 0;
1129         }
1130
1131 exit:
1132
1133         return ret;
1134 }
1135
1136 static int validate_recv_frame(struct adapter *adapter,
1137                                struct recv_frame *precv_frame)
1138 {
1139         /* shall check frame subtype, to / from ds, da, bssid */
1140
1141         /* then call check if rx seq/frag. duplicated. */
1142
1143         u8 type;
1144         u8 subtype;
1145         int retval = _SUCCESS;
1146         u8 bDumpRxPkt;
1147         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1148         u8 *ptr = precv_frame->pkt->data;
1149         u8  ver = (unsigned char)(*ptr) & 0x3;
1150         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1151
1152         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1153                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1154
1155                 if (ch_set_idx >= 0)
1156                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1157         }
1158
1159         /* add version chk */
1160         if (ver != 0) {
1161                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1162                 retval = _FAIL;
1163                 goto exit;
1164         }
1165
1166         type =  GetFrameType(ptr);
1167         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1168
1169         pattrib->to_fr_ds = get_tofr_ds(ptr);
1170
1171         pattrib->frag_num = GetFragNum(ptr);
1172         pattrib->seq_num = GetSequence(ptr);
1173
1174         pattrib->pw_save = GetPwrMgt(ptr);
1175         pattrib->mfrag = GetMFrag(ptr);
1176         pattrib->mdata = GetMData(ptr);
1177         pattrib->privacy = GetPrivacy(ptr);
1178         pattrib->order = GetOrder(ptr);
1179
1180         /* Dump rx packets */
1181         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1182         if (bDumpRxPkt == 1) {/* dump all rx packets */
1183                 if (_drv_err_ <= GlobalDebugLevel) {
1184                         pr_info(DRIVER_PREFIX "#############################\n");
1185                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1186                                        16, 1, ptr, 64, false);
1187                         pr_info(DRIVER_PREFIX "#############################\n");
1188                 }
1189         } else if (bDumpRxPkt == 2) {
1190                 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_MGT_TYPE)) {
1191                         pr_info(DRIVER_PREFIX "#############################\n");
1192                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1193                                        16, 1, ptr, 64, false);
1194                         pr_info(DRIVER_PREFIX "#############################\n");
1195                 }
1196         } else if (bDumpRxPkt == 3) {
1197                 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_DATA_TYPE)) {
1198                         pr_info(DRIVER_PREFIX "#############################\n");
1199                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1200                                        16, 1, ptr, 64, false);
1201                         pr_info(DRIVER_PREFIX "#############################\n");
1202                 }
1203         }
1204         switch (type) {
1205         case WIFI_MGT_TYPE: /* mgnt */
1206                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1207                 if (retval == _FAIL)
1208                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1209                 retval = _FAIL; /*  only data frame return _SUCCESS */
1210                 break;
1211         case WIFI_CTRL_TYPE: /* ctrl */
1212                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1213                 if (retval == _FAIL)
1214                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1215                 retval = _FAIL; /*  only data frame return _SUCCESS */
1216                 break;
1217         case WIFI_DATA_TYPE: /* data */
1218                 led_control_8188eu(adapter, LED_CTL_RX);
1219                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1220                 retval = validate_recv_data_frame(adapter, precv_frame);
1221                 if (retval == _FAIL) {
1222                         struct recv_priv *precvpriv = &adapter->recvpriv;
1223
1224                         precvpriv->rx_drop++;
1225                 }
1226                 break;
1227         default:
1228                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1229                 retval = _FAIL;
1230                 break;
1231         }
1232
1233         /*
1234          * This is the last moment before management and control frames get
1235          * discarded. So we need to forward them to the monitor now or never.
1236          *
1237          * At the same time data frames can still be encrypted if software
1238          * decryption is in use. However, decryption can occur not until later
1239          * (see recv_func()).
1240          *
1241          * Hence forward the frame to the monitor anyway to preserve the order
1242          * in which frames were received.
1243          */
1244         rtl88eu_mon_recv_hook(adapter->pmondev, precv_frame);
1245
1246 exit:
1247
1248         return retval;
1249 }
1250
1251 /* remove the wlanhdr and add the eth_hdr */
1252
1253 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1254 {
1255         int     rmv_len;
1256         u16     eth_type, len;
1257         __be16 be_tmp;
1258         u8      bsnaphdr;
1259         u8      *psnap_type;
1260         struct ieee80211_snap_hdr       *psnap;
1261
1262         u8 *ptr = precvframe->pkt->data;
1263         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1264
1265         if (pattrib->encrypt)
1266                 skb_trim(precvframe->pkt, precvframe->pkt->len - pattrib->icv_len);
1267
1268         psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen + pattrib->iv_len);
1269         psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE;
1270         /* convert hdr + possible LLC headers into Ethernet header */
1271         if ((!memcmp(psnap, rfc1042_header, SNAP_SIZE) &&
1272              memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) &&
1273              memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2)) ||
1274              !memcmp(psnap, bridge_tunnel_header, SNAP_SIZE)) {
1275                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1276                 bsnaphdr = true;
1277         } else {
1278                 /* Leave Ethernet header part of hdr and full payload */
1279                 bsnaphdr = false;
1280         }
1281
1282         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1283         len = precvframe->pkt->len - rmv_len;
1284
1285         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1286                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1287
1288         memcpy(&be_tmp, ptr + rmv_len, 2);
1289         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1290         pattrib->eth_type = eth_type;
1291
1292         ptr = skb_pull(precvframe->pkt, rmv_len - sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0));
1293         if (!ptr)
1294                 return _FAIL;
1295
1296         memcpy(ptr, pattrib->dst, ETH_ALEN);
1297         memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN);
1298
1299         if (!bsnaphdr) {
1300                 be_tmp = htons(len);
1301                 memcpy(ptr + 12, &be_tmp, 2);
1302         }
1303
1304         return _SUCCESS;
1305 }
1306
1307 /* perform defrag */
1308 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1309                                            struct __queue *defrag_q)
1310 {
1311         struct list_head *plist, *phead;
1312         u8 wlanhdr_offset;
1313         u8      curfragnum;
1314         struct recv_frame *pnfhdr;
1315         struct recv_frame *prframe, *pnextrframe;
1316         struct __queue *pfree_recv_queue;
1317
1318         curfragnum = 0;
1319         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1320
1321         phead = get_list_head(defrag_q);
1322         plist = phead->next;
1323         prframe = list_entry(plist, struct recv_frame, list);
1324         list_del_init(&prframe->list);
1325
1326         if (curfragnum != prframe->attrib.frag_num) {
1327                 /* the first fragment number must be 0 */
1328                 /* free the whole queue */
1329                 rtw_free_recvframe(prframe, pfree_recv_queue);
1330                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1331
1332                 return NULL;
1333         }
1334
1335         curfragnum++;
1336
1337         plist = get_list_head(defrag_q);
1338
1339         plist = plist->next;
1340
1341         while (phead != plist) {
1342                 pnfhdr = list_entry(plist, struct recv_frame, list);
1343                 pnextrframe = pnfhdr;
1344
1345                 /* check the fragment sequence  (2nd ~n fragment frame) */
1346
1347                 if (curfragnum != pnfhdr->attrib.frag_num) {
1348                         /* the fragment number must be increasing  (after decache) */
1349                         /* release the defrag_q & prframe */
1350                         rtw_free_recvframe(prframe, pfree_recv_queue);
1351                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1352                         return NULL;
1353                 }
1354
1355                 curfragnum++;
1356
1357                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1358                 /* get the 2nd~last fragment frame's payload */
1359
1360                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1361
1362                 skb_pull(pnextrframe->pkt, wlanhdr_offset);
1363
1364                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1365                 skb_trim(prframe->pkt, prframe->pkt->len - prframe->attrib.icv_len);
1366
1367                 skb_put_data(prframe->pkt, pnfhdr->pkt->data, pnfhdr->pkt->len);
1368
1369                 prframe->attrib.icv_len = pnfhdr->attrib.icv_len;
1370                 plist = plist->next;
1371         }
1372
1373         /* free the defrag_q queue and return the prframe */
1374         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1375
1376         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1377
1378         return prframe;
1379 }
1380
1381 /* check if need to defrag, if needed queue the frame to defrag_q */
1382 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1383                                         struct recv_frame *precv_frame)
1384 {
1385         u8      ismfrag;
1386         u8      fragnum;
1387         u8      *psta_addr;
1388         struct recv_frame *pfhdr;
1389         struct sta_info *psta;
1390         struct sta_priv *pstapriv;
1391         struct list_head *phead;
1392         struct recv_frame *prtnframe = NULL;
1393         struct __queue *pfree_recv_queue, *pdefrag_q;
1394
1395         pstapriv = &padapter->stapriv;
1396
1397         pfhdr = precv_frame;
1398
1399         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1400
1401         /* need to define struct of wlan header frame ctrl */
1402         ismfrag = pfhdr->attrib.mfrag;
1403         fragnum = pfhdr->attrib.frag_num;
1404
1405         psta_addr = pfhdr->attrib.ta;
1406         psta = rtw_get_stainfo(pstapriv, psta_addr);
1407         if (!psta) {
1408                 u8 type = GetFrameType(pfhdr->pkt->data);
1409
1410                 if (type != WIFI_DATA_TYPE) {
1411                         psta = rtw_get_bcmc_stainfo(padapter);
1412                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1413                 } else {
1414                         pdefrag_q = NULL;
1415                 }
1416         } else {
1417                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1418         }
1419
1420         if ((ismfrag == 0) && (fragnum == 0))
1421                 prtnframe = precv_frame;/* isn't a fragment frame */
1422
1423         if (ismfrag == 1) {
1424                 /* 0~(n-1) fragment frame */
1425                 /* enqueue to defraf_g */
1426                 if (pdefrag_q) {
1427                         if (fragnum == 0) {
1428                                 /* the first fragment */
1429                                 if (!list_empty(&pdefrag_q->queue))
1430                                         /* free current defrag_q */
1431                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1432                         }
1433
1434                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1435
1436                         phead = get_list_head(pdefrag_q);
1437                         list_add_tail(&pfhdr->list, phead);
1438
1439                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1440
1441                         prtnframe = NULL;
1442                 } else {
1443                         /* can't find this ta's defrag_queue, so free this recv_frame */
1444                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1445                         prtnframe = NULL;
1446                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1447                 }
1448         }
1449
1450         if ((ismfrag == 0) && (fragnum != 0)) {
1451                 /* the last fragment frame */
1452                 /* enqueue the last fragment */
1453                 if (pdefrag_q) {
1454                         phead = get_list_head(pdefrag_q);
1455                         list_add_tail(&pfhdr->list, phead);
1456
1457                         /* call recvframe_defrag to defrag */
1458                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1459                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1460                         prtnframe = precv_frame;
1461                 } else {
1462                         /* can't find this ta's defrag_queue, so free this recv_frame */
1463                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1464                         prtnframe = NULL;
1465                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1466                 }
1467         }
1468
1469         if (prtnframe && (prtnframe->attrib.privacy)) {
1470                 /* after defrag we must check tkip mic code */
1471                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1472                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1473                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1474                         prtnframe = NULL;
1475                 }
1476         }
1477
1478         return prtnframe;
1479 }
1480
1481 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1482 {
1483         int     a_len, padding_len;
1484         u16     eth_type, nSubframe_Length;
1485         u8      nr_subframes, i;
1486         unsigned char *pdata;
1487         struct rx_pkt_attrib *pattrib;
1488         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1489         struct recv_priv *precvpriv = &padapter->recvpriv;
1490         struct __queue *pfree_recv_queue = &precvpriv->free_recv_queue;
1491
1492         nr_subframes = 0;
1493         pattrib = &prframe->attrib;
1494
1495         skb_pull(prframe->pkt, prframe->attrib.hdrlen);
1496
1497         if (prframe->attrib.iv_len > 0)
1498                 skb_pull(prframe->pkt, prframe->attrib.iv_len);
1499
1500         a_len = prframe->pkt->len;
1501
1502         pdata = prframe->pkt->data;
1503
1504         while (a_len > ETH_HLEN) {
1505                 /* Offset 12 denote 2 mac address */
1506                 nSubframe_Length = get_unaligned_be16(pdata + 12);
1507
1508                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1509                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1510                         goto exit;
1511                 }
1512
1513                 /* move the data point to data content */
1514                 pdata += ETH_HLEN;
1515                 a_len -= ETH_HLEN;
1516
1517                 /* Allocate new skb for releasing to upper layer */
1518                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1519                 if (!sub_skb) {
1520                         DBG_88E("dev_alloc_skb() Fail!!! , nr_subframes=%d\n", nr_subframes);
1521                         break;
1522                 }
1523
1524                 skb_reserve(sub_skb, 12);
1525                 skb_put_data(sub_skb, pdata, nSubframe_Length);
1526
1527                 subframes[nr_subframes++] = sub_skb;
1528
1529                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1530                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1531                         break;
1532                 }
1533
1534                 pdata += nSubframe_Length;
1535                 a_len -= nSubframe_Length;
1536                 if (a_len != 0) {
1537                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4 - 1));
1538                         if (padding_len == 4)
1539                                 padding_len = 0;
1540
1541                         if (a_len < padding_len)
1542                                 goto exit;
1543
1544                         pdata += padding_len;
1545                         a_len -= padding_len;
1546                 }
1547         }
1548
1549         for (i = 0; i < nr_subframes; i++) {
1550                 sub_skb = subframes[i];
1551                 /* convert hdr + possible LLC headers into Ethernet header */
1552                 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1553                 if (sub_skb->len >= 8 &&
1554                     ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
1555                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1556                          !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
1557                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1558                         skb_pull(sub_skb, SNAP_SIZE);
1559                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1560                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1561                 } else {
1562                         __be16 len;
1563                         /* Leave Ethernet header part of hdr and full payload */
1564                         len = htons(sub_skb->len);
1565                         memcpy(skb_push(sub_skb, 2), &len, 2);
1566                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1567                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1568                 }
1569
1570                 /* Indicate the packets to upper layer */
1571                 /*  Insert NAT2.5 RX here! */
1572                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1573                 sub_skb->dev = padapter->pnetdev;
1574
1575                 sub_skb->ip_summed = CHECKSUM_NONE;
1576
1577                 netif_rx(sub_skb);
1578         }
1579
1580 exit:
1581         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1582
1583         return _SUCCESS;
1584 }
1585
1586 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1587 {
1588         u8      wsize = preorder_ctrl->wsize_b;
1589         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1590
1591         /*  Rx Reorder initialize condition. */
1592         if (preorder_ctrl->indicate_seq == 0xFFFF)
1593                 preorder_ctrl->indicate_seq = seq_num;
1594
1595         /*  Drop out the packet which SeqNum is smaller than WinStart */
1596         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1597                 return false;
1598
1599         /*  */
1600         /*  Sliding window manipulation. Conditions includes: */
1601         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1602         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1603         /*  */
1604         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1605                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1606         } else if (SN_LESS(wend, seq_num)) {
1607                 if (seq_num >= (wsize - 1))
1608                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1609                 else
1610                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1611         }
1612
1613         return true;
1614 }
1615
1616 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1617                                      struct recv_frame *prframe)
1618 {
1619         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1620         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1621         struct list_head *phead, *plist;
1622         struct recv_frame *hdr;
1623         struct rx_pkt_attrib *pnextattrib;
1624
1625         phead = get_list_head(ppending_recvframe_queue);
1626         plist = phead->next;
1627
1628         while (phead != plist) {
1629                 hdr = list_entry(plist, struct recv_frame, list);
1630                 pnextattrib = &hdr->attrib;
1631
1632                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1633                         plist = plist->next;
1634                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1635                         return false;
1636                 else
1637                         break;
1638         }
1639
1640         list_del_init(&prframe->list);
1641
1642         list_add_tail(&prframe->list, plist);
1643         return true;
1644 }
1645
1646 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1647 {
1648         struct list_head *phead, *plist;
1649         struct recv_frame *prframe;
1650         struct recv_frame *prhdr;
1651         struct rx_pkt_attrib *pattrib;
1652         int bPktInBuf = false;
1653         struct recv_priv *precvpriv = &padapter->recvpriv;
1654         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1655
1656         phead =         get_list_head(ppending_recvframe_queue);
1657         plist = phead->next;
1658
1659         /*  Handling some condition for forced indicate case. */
1660         if (bforced) {
1661                 if (list_empty(phead))
1662                         return true;
1663
1664                 prhdr = list_entry(plist, struct recv_frame, list);
1665                 pattrib = &prhdr->attrib;
1666                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1667         }
1668
1669         /*  Prepare indication list and indication. */
1670         /*  Check if there is any packet need indicate. */
1671         while (!list_empty(phead)) {
1672                 prhdr = list_entry(plist, struct recv_frame, list);
1673                 prframe = prhdr;
1674                 pattrib = &prframe->attrib;
1675
1676                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1677                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1678                                  ("%s: indicate=%d seq=%d amsdu=%d\n",
1679                                   __func__, preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1680                         plist = plist->next;
1681                         list_del_init(&prframe->list);
1682
1683                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1684                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1685
1686                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1687
1688                         /* indicate this recv_frame */
1689                         if (!pattrib->amsdu) {
1690                                 if ((!padapter->bDriverStopped) &&
1691                                     (!padapter->bSurpriseRemoved))
1692                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1693                         } else if (pattrib->amsdu == 1) {
1694                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1695                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1696                         } else {
1697                                 /* error condition; */
1698                         }
1699
1700                         /* Update local variables. */
1701                         bPktInBuf = false;
1702                 } else {
1703                         bPktInBuf = true;
1704                         break;
1705                 }
1706         }
1707         return bPktInBuf;
1708 }
1709
1710 static int recv_indicatepkt_reorder(struct adapter *padapter,
1711                                     struct recv_frame *prframe)
1712 {
1713         int retval = _SUCCESS;
1714         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1715         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1716         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1717
1718         if (!pattrib->amsdu) {
1719                 /* s1. */
1720                 wlanhdr_to_ethhdr(prframe);
1721
1722                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1723                     (pattrib->ack_policy != 0)) {
1724                         if ((!padapter->bDriverStopped) &&
1725                             (!padapter->bSurpriseRemoved)) {
1726                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  %s -recv_func recv_indicatepkt\n", __func__));
1727
1728                                 rtw_recv_indicatepkt(padapter, prframe);
1729                                 return _SUCCESS;
1730                         }
1731
1732                         return _FAIL;
1733                 }
1734
1735                 if (!preorder_ctrl->enable) {
1736                         /* indicate this recv_frame */
1737                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1738                         rtw_recv_indicatepkt(padapter, prframe);
1739
1740                         preorder_ctrl->indicate_seq =
1741                                 (preorder_ctrl->indicate_seq + 1) % 4096;
1742                         return _SUCCESS;
1743                 }
1744         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1745                 if (!preorder_ctrl->enable) {
1746                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1747                         retval = amsdu_to_msdu(padapter, prframe);
1748
1749                         preorder_ctrl->indicate_seq =
1750                                 (preorder_ctrl->indicate_seq + 1) % 4096;
1751                         return retval;
1752                 }
1753         }
1754
1755         spin_lock_bh(&ppending_recvframe_queue->lock);
1756
1757         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1758                  ("%s: indicate=%d seq=%d\n", __func__,
1759                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1760
1761         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1762         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1763                 rtw_recv_indicatepkt(padapter, prframe);
1764
1765                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1766
1767                 goto _success_exit;
1768         }
1769
1770         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1771         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1772                 goto _err_exit;
1773
1774         /* s4. */
1775         /*  Indication process. */
1776         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1777         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1778         /*  */
1779         /*  For Rx Reorder condition: */
1780         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1781         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1782         /*  */
1783
1784         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1785         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1786                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1787                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1788                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1789         } else {
1790                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1791                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1792         }
1793
1794 _success_exit:
1795
1796         return _SUCCESS;
1797
1798 _err_exit:
1799
1800         spin_unlock_bh(&ppending_recvframe_queue->lock);
1801
1802         return _FAIL;
1803 }
1804
1805 void rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
1806 {
1807         struct recv_reorder_ctrl *preorder_ctrl = from_timer(preorder_ctrl, t,
1808                                                            reordering_ctrl_timer);
1809         struct adapter *padapter = preorder_ctrl->padapter;
1810         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1811
1812         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1813                 return;
1814
1815         spin_lock_bh(&ppending_recvframe_queue->lock);
1816
1817         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true))
1818                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1819                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1820
1821         spin_unlock_bh(&ppending_recvframe_queue->lock);
1822 }
1823
1824 static int process_recv_indicatepkts(struct adapter *padapter,
1825                                      struct recv_frame *prframe)
1826 {
1827         int retval = _SUCCESS;
1828         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
1829         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
1830
1831         if (phtpriv->ht_option) {  /* B/G/N Mode */
1832                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1833                         /*  including perform A-MPDU Rx Ordering Buffer Control */
1834                         if ((!padapter->bDriverStopped) &&
1835                             (!padapter->bSurpriseRemoved)) {
1836                                 return _FAIL;
1837                         }
1838                 }
1839         } else { /* B/G mode */
1840                 retval = wlanhdr_to_ethhdr(prframe);
1841                 if (retval != _SUCCESS) {
1842                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1843                         return retval;
1844                 }
1845
1846                 if ((!padapter->bDriverStopped) &&
1847                     (!padapter->bSurpriseRemoved)) {
1848                         /* indicate this recv_frame */
1849                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ %s- recv_func recv_indicatepkt\n", __func__));
1850                         rtw_recv_indicatepkt(padapter, prframe);
1851                 } else {
1852                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ %s- recv_func free_indicatepkt\n", __func__));
1853
1854                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
1855                         return _FAIL;
1856                 }
1857         }
1858
1859         return retval;
1860 }
1861
1862 static int recv_func_prehandle(struct adapter *padapter,
1863                                struct recv_frame *rframe)
1864 {
1865         int ret = _SUCCESS;
1866         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1867
1868         /* check the frame crtl field and decache */
1869         ret = validate_recv_frame(padapter, rframe);
1870         if (ret != _SUCCESS) {
1871                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
1872                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
1873                 goto exit;
1874         }
1875
1876 exit:
1877         return ret;
1878 }
1879
1880 static int recv_func_posthandle(struct adapter *padapter,
1881                                 struct recv_frame *prframe)
1882 {
1883         int ret = _SUCCESS;
1884         struct recv_frame *orig_prframe = prframe;
1885         struct recv_priv *precvpriv = &padapter->recvpriv;
1886         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1887
1888         /*  DATA FRAME */
1889         led_control_8188eu(padapter, LED_CTL_RX);
1890
1891         prframe = decryptor(padapter, prframe);
1892         if (!prframe) {
1893                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
1894                 ret = _FAIL;
1895                 goto _recv_data_drop;
1896         }
1897
1898         prframe = recvframe_chk_defrag(padapter, prframe);
1899         if (!prframe) {
1900                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
1901                 goto _recv_data_drop;
1902         }
1903
1904         prframe = portctrl(padapter, prframe);
1905         if (!prframe) {
1906                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
1907                 ret = _FAIL;
1908                 goto _recv_data_drop;
1909         }
1910
1911         count_rx_stats(padapter, prframe, NULL);
1912
1913         ret = process_recv_indicatepkts(padapter, prframe);
1914         if (ret != _SUCCESS) {
1915                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
1916                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
1917                 goto _recv_data_drop;
1918         }
1919         return ret;
1920
1921 _recv_data_drop:
1922         precvpriv->rx_drop++;
1923         return ret;
1924 }
1925
1926 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
1927 {
1928         int ret;
1929         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
1930         struct security_priv *psecuritypriv = &padapter->securitypriv;
1931         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
1932
1933         /* check if need to handle uc_swdec_pending_queue*/
1934         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
1935                 struct recv_frame *pending_frame;
1936
1937                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
1938                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
1939                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
1940                 }
1941         }
1942
1943         ret = recv_func_prehandle(padapter, rframe);
1944
1945         if (ret == _SUCCESS) {
1946                 /* check if need to enqueue into uc_swdec_pending_queue*/
1947                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
1948                     !is_multicast_ether_addr(prxattrib->ra) &&
1949                     prxattrib->encrypt > 0 &&
1950                     prxattrib->bdecrypted == 0 &&
1951                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
1952                     !psecuritypriv->busetkipkey) {
1953                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
1954                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
1955                         goto exit;
1956                 }
1957
1958                 ret = recv_func_posthandle(padapter, rframe);
1959         }
1960
1961 exit:
1962         return ret;
1963 }
1964
1965 s32 rtw_recv_entry(struct recv_frame *precvframe)
1966 {
1967         struct adapter *padapter;
1968         struct recv_priv *precvpriv;
1969         s32 ret = _SUCCESS;
1970
1971         padapter = precvframe->adapter;
1972
1973         precvpriv = &padapter->recvpriv;
1974
1975         ret = recv_func(padapter, precvframe);
1976         if (ret == _FAIL) {
1977                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("%s: recv_func return fail!!!\n", __func__));
1978                 goto _recv_entry_drop;
1979         }
1980
1981         precvpriv->rx_pkts++;
1982
1983         return ret;
1984
1985 _recv_entry_drop:
1986         return ret;
1987 }
1988
1989 static void rtw_signal_stat_timer_hdl(struct timer_list *t)
1990 {
1991         struct adapter *adapter =
1992                 from_timer(adapter, t, recvpriv.signal_stat_timer);
1993         struct recv_priv *recvpriv = &adapter->recvpriv;
1994
1995         u32 tmp_s, tmp_q;
1996         u8 avg_signal_strength = 0;
1997         u8 avg_signal_qual = 0;
1998         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
1999
2000         if (recvpriv->signal_strength_data.update_req == 0) {
2001                 /* update_req is clear, means we got rx */
2002                 avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2003                 /* after avg_vals are acquired, we can re-stat the signal
2004                  * values
2005                  */
2006                 recvpriv->signal_strength_data.update_req = 1;
2007         }
2008
2009         if (recvpriv->signal_qual_data.update_req == 0) {
2010                 /* update_req is clear, means we got rx */
2011                 avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2012                 /* after avg_vals are acquired, we can re-stat the signal
2013                  * values
2014                  */
2015                 recvpriv->signal_qual_data.update_req = 1;
2016         }
2017
2018         /* update value of signal_strength, rssi, signal_qual */
2019         if (!check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY)) {
2020                 tmp_s = avg_signal_strength +
2021                         (_alpha - 1) * recvpriv->signal_strength;
2022                 tmp_s = DIV_ROUND_UP(tmp_s, _alpha);
2023                 if (tmp_s > 100)
2024                         tmp_s = 100;
2025
2026                 tmp_q = avg_signal_qual +
2027                         (_alpha - 1) * recvpriv->signal_qual;
2028                 tmp_q = DIV_ROUND_UP(tmp_q, _alpha);
2029                 if (tmp_q > 100)
2030                         tmp_q = 100;
2031
2032                 recvpriv->signal_strength = tmp_s;
2033                 recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2034                 recvpriv->signal_qual = tmp_q;
2035         }
2036
2037         rtw_set_signal_stat_timer(recvpriv);
2038 }