drivers/staging/rtl8188eu/core/rtw_sta_mgt.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _RTW_STA_MGT_C_
  16
  17 #include <osdep_service.h>
  18 #include <drv_types.h>
  19 #include <recv_osdep.h>
  20 #include <xmit_osdep.h>
  21 #include <mlme_osdep.h>
  22 #include <sta_info.h>
  23 #include <linux/vmalloc.h>
  24
  25 static void _rtw_init_stainfo(struct sta_info *psta)
  26 {
  27         memset((u8 *)psta, 0, sizeof(struct sta_info));
  28
  29          spin_lock_init(&psta->lock);
  30         INIT_LIST_HEAD(&psta->list);
  31         INIT_LIST_HEAD(&psta->hash_list);
  32         _rtw_init_queue(&psta->sleep_q);
  33         psta->sleepq_len = 0;
  34
  35         _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
  36         _rtw_init_sta_recv_priv(&psta->sta_recvpriv);
  37
  38 #ifdef CONFIG_88EU_AP_MODE
  39
  40         INIT_LIST_HEAD(&psta->asoc_list);
  41
  42         INIT_LIST_HEAD(&psta->auth_list);
  43
  44         psta->expire_to = 0;
  45
  46         psta->flags = 0;
  47
  48         psta->capability = 0;
  49
  50         psta->bpairwise_key_installed = false;
  51
  52         psta->nonerp_set = 0;
  53         psta->no_short_slot_time_set = 0;
  54         psta->no_short_preamble_set = 0;
  55         psta->no_ht_gf_set = 0;
  56         psta->no_ht_set = 0;
  57         psta->ht_20mhz_set = 0;
  58
  59         psta->under_exist_checking = 0;
  60
  61         psta->keep_alive_trycnt = 0;
  62
  63 #endif  /*  CONFIG_88EU_AP_MODE */
  64
  65 }
  66
  67 u32     _rtw_init_sta_priv(struct       sta_priv *pstapriv)
  68 {
  69         struct sta_info *psta;
  70         s32 i;
  71
  72
  73         pstapriv->pallocated_stainfo_buf = vzalloc(sizeof(struct sta_info) * NUM_STA + 4);
  74
  75         if (!pstapriv->pallocated_stainfo_buf)
  76                 return _FAIL;
  77
  78         pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
  79                 ((size_t)(pstapriv->pallocated_stainfo_buf) & 3);
  80
  81         _rtw_init_queue(&pstapriv->free_sta_queue);
  82
  83         spin_lock_init(&pstapriv->sta_hash_lock);
  84
  85         pstapriv->asoc_sta_count = 0;
  86         _rtw_init_queue(&pstapriv->sleep_q);
  87         _rtw_init_queue(&pstapriv->wakeup_q);
  88
  89         psta = (struct sta_info *)(pstapriv->pstainfo_buf);
  90
  91         for (i = 0; i < NUM_STA; i++) {
  92                 _rtw_init_stainfo(psta);
  93
  94                 INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
  95
  96                 list_add_tail(&psta->list, get_list_head(&pstapriv->free_sta_queue));
  97
  98                 psta++;
  99         }
 100
 101 #ifdef CONFIG_88EU_AP_MODE
 102
 103         pstapriv->sta_dz_bitmap = 0;
 104         pstapriv->tim_bitmap = 0;
 105
 106         INIT_LIST_HEAD(&pstapriv->asoc_list);
 107         INIT_LIST_HEAD(&pstapriv->auth_list);
 108         spin_lock_init(&pstapriv->asoc_list_lock);
 109         spin_lock_init(&pstapriv->auth_list_lock);
 110         pstapriv->asoc_list_cnt = 0;
 111         pstapriv->auth_list_cnt = 0;
 112
 113         pstapriv->auth_to = 3; /*  3*2 = 6 sec */
 114         pstapriv->assoc_to = 3;
 115         pstapriv->expire_to = 3; /*  3*2 = 6 sec */
 116         pstapriv->max_num_sta = NUM_STA;
 117 #endif
 118
 119
 120         return _SUCCESS;
 121 }
 122
 123 inline int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta)
 124 {
 125         int offset = (((u8 *)sta) - stapriv->pstainfo_buf)/sizeof(struct sta_info);
 126
 127         if (!stainfo_offset_valid(offset))
 128                 DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
 129
 130         return offset;
 131 }
 132
 133 inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int offset)
 134 {
 135         if (!stainfo_offset_valid(offset))
 136                 DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
 137
 138         return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
 139 }
 140
 141 u32     _rtw_free_sta_priv(struct       sta_priv *pstapriv)
 142 {
 143         struct list_head *phead, *plist;
 144         struct sta_info *psta = NULL;
 145         struct recv_reorder_ctrl *preorder_ctrl;
 146         int     index;
 147
 148         if (pstapriv) {
 149                 /*      delete all reordering_ctrl_timer                */
 150                 spin_lock_bh(&pstapriv->sta_hash_lock);
 151                 for (index = 0; index < NUM_STA; index++) {
 152                         phead = &(pstapriv->sta_hash[index]);
 153                         plist = phead->next;
 154
 155                         while (phead != plist) {
 156                                 int i;
 157                                 psta = container_of(plist, struct sta_info,
 158                                                     hash_list);
 159                                 plist = plist->next;
 160
 161                                 for (i = 0; i < 16; i++) {
 162                                         preorder_ctrl = &psta->recvreorder_ctrl[i];
 163                                         del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
 164                                 }
 165                         }
 166                 }
 167                 spin_unlock_bh(&pstapriv->sta_hash_lock);
 168                 /*===============================*/
 169
 170                 vfree(pstapriv->pallocated_stainfo_buf);
 171         }
 172
 173         return _SUCCESS;
 174 }
 175
 176 struct sta_info *rtw_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 177 {
 178         s32 index;
 179         struct list_head *phash_list;
 180         struct sta_info *psta;
 181         struct __queue *pfree_sta_queue;
 182         struct recv_reorder_ctrl *preorder_ctrl;
 183         int i = 0;
 184         u16  wRxSeqInitialValue = 0xffff;
 185
 186         pfree_sta_queue = &pstapriv->free_sta_queue;
 187
 188         spin_lock_bh(&pfree_sta_queue->lock);
 189         psta = list_first_entry_or_null(&pfree_sta_queue->queue,
 190                                         struct sta_info, list);
 191         if (!psta) {
 192                 spin_unlock_bh(&pfree_sta_queue->lock);
 193         } else {
 194                 list_del_init(&psta->list);
 195                 spin_unlock_bh(&pfree_sta_queue->lock);
 196                 _rtw_init_stainfo(psta);
 197                 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
 198                 index = wifi_mac_hash(hwaddr);
 199                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_, ("rtw_alloc_stainfo: index=%x", index));
 200                 if (index >= NUM_STA) {
 201                         RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("ERROR => rtw_alloc_stainfo: index >= NUM_STA"));
 202                         psta = NULL;
 203                         goto exit;
 204                 }
 205                 phash_list = &pstapriv->sta_hash[index];
 206
 207                 spin_lock_bh(&pstapriv->sta_hash_lock);
 208                 list_add_tail(&psta->hash_list, phash_list);
 209                 pstapriv->asoc_sta_count++;
 210                 spin_unlock_bh(&pstapriv->sta_hash_lock);
 211
 212 /*  Commented by Albert 2009/08/13 */
 213 /*  For the SMC router, the sequence number of first packet of WPS handshake will be 0. */
 214 /*  In this case, this packet will be dropped by recv_decache function if we use the 0x00 as the default value for tid_rxseq variable. */
 215 /*  So, we initialize the tid_rxseq variable as the 0xffff. */
 216
 217                 for (i = 0; i < 16; i++)
 218                         memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i], &wRxSeqInitialValue, 2);
 219
 220                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_,
 221                          ("alloc number_%d stainfo  with hwaddr = %pM\n",
 222                          pstapriv->asoc_sta_count, hwaddr));
 223
 224                 init_addba_retry_timer(pstapriv->padapter, psta);
 225
 226                 /* for A-MPDU Rx reordering buffer control */
 227                 for (i = 0; i < 16; i++) {
 228                         preorder_ctrl = &psta->recvreorder_ctrl[i];
 229
 230                         preorder_ctrl->padapter = pstapriv->padapter;
 231
 232                         preorder_ctrl->enable = false;
 233
 234                         preorder_ctrl->indicate_seq = 0xffff;
 235                         preorder_ctrl->wend_b = 0xffff;
 236                         preorder_ctrl->wsize_b = 64;/* 64; */
 237
 238                         _rtw_init_queue(&preorder_ctrl->pending_recvframe_queue);
 239
 240                         rtw_init_recv_timer(preorder_ctrl);
 241                 }
 242
 243                 /* init for DM */
 244                 psta->rssi_stat.UndecoratedSmoothedPWDB = (-1);
 245                 psta->rssi_stat.UndecoratedSmoothedCCK = (-1);
 246
 247                 /* init for the sequence number of received management frame */
 248                 psta->RxMgmtFrameSeqNum = 0xffff;
 249         }
 250
 251 exit:
 252         return psta;
 253 }
 254
 255 /*  using pstapriv->sta_hash_lock to protect */
 256 u32     rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
 257 {
 258         int i;
 259         struct __queue *pfree_sta_queue;
 260         struct recv_reorder_ctrl *preorder_ctrl;
 261         struct  sta_xmit_priv   *pstaxmitpriv;
 262         struct  xmit_priv       *pxmitpriv = &padapter->xmitpriv;
 263         struct  sta_priv *pstapriv = &padapter->stapriv;
 264
 265
 266         if (!psta)
 267                 goto exit;
 268
 269         pfree_sta_queue = &pstapriv->free_sta_queue;
 270
 271         pstaxmitpriv = &psta->sta_xmitpriv;
 272
 273         spin_lock_bh(&pxmitpriv->lock);
 274
 275         rtw_free_xmitframe_queue(pxmitpriv, &psta->sleep_q);
 276         psta->sleepq_len = 0;
 277
 278         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
 279
 280         list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
 281
 282         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
 283
 284         list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
 285
 286         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
 287
 288         list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
 289
 290         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
 291
 292         list_del_init(&(pstaxmitpriv->be_q.tx_pending));
 293
 294         spin_unlock_bh(&pxmitpriv->lock);
 295
 296         list_del_init(&psta->hash_list);
 297         RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_,
 298                  ("\n free number_%d stainfo with hwaddr=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x\n",
 299                  pstapriv->asoc_sta_count, psta->hwaddr[0], psta->hwaddr[1],
 300                  psta->hwaddr[2], psta->hwaddr[3], psta->hwaddr[4],
 301                  psta->hwaddr[5]));
 302         pstapriv->asoc_sta_count--;
 303
 304         /*  re-init sta_info; 20061114 */
 305         _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
 306         _rtw_init_sta_recv_priv(&psta->sta_recvpriv);
 307
 308         del_timer_sync(&psta->addba_retry_timer);
 309
 310         /* for A-MPDU Rx reordering buffer control, cancel reordering_ctrl_timer */
 311         for (i = 0; i < 16; i++) {
 312                 struct list_head *phead, *plist;
 313                 struct recv_frame *prhdr;
 314                 struct recv_frame *prframe;
 315                 struct __queue *ppending_recvframe_queue;
 316                 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
 317
 318                 preorder_ctrl = &psta->recvreorder_ctrl[i];
 319
 320                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
 321
 322                 ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
 323
 324                 spin_lock_bh(&ppending_recvframe_queue->lock);
 325
 326                 phead =         get_list_head(ppending_recvframe_queue);
 327                 plist = phead->next;
 328
 329                 while (!list_empty(phead)) {
 330                         prhdr = container_of(plist, struct recv_frame, list);
 331                         prframe = (struct recv_frame *)prhdr;
 332
 333                         plist = plist->next;
 334
 335                         list_del_init(&(prframe->list));
 336
 337                         rtw_free_recvframe(prframe, pfree_recv_queue);
 338                 }
 339
 340                 spin_unlock_bh(&ppending_recvframe_queue->lock);
 341         }
 342
 343         if (!(psta->state & WIFI_AP_STATE))
 344                 rtw_hal_set_odm_var(padapter, HAL_ODM_STA_INFO, psta, false);
 345
 346 #ifdef CONFIG_88EU_AP_MODE
 347
 348         spin_lock_bh(&pstapriv->auth_list_lock);
 349         if (!list_empty(&psta->auth_list)) {
 350                 list_del_init(&psta->auth_list);
 351                 pstapriv->auth_list_cnt--;
 352         }
 353         spin_unlock_bh(&pstapriv->auth_list_lock);
 354
 355         psta->expire_to = 0;
 356
 357         psta->sleepq_ac_len = 0;
 358         psta->qos_info = 0;
 359
 360         psta->max_sp_len = 0;
 361         psta->uapsd_bk = 0;
 362         psta->uapsd_be = 0;
 363         psta->uapsd_vi = 0;
 364         psta->uapsd_vo = 0;
 365         psta->has_legacy_ac = 0;
 366
 367         pstapriv->sta_dz_bitmap &= ~BIT(psta->aid);
 368         pstapriv->tim_bitmap &= ~BIT(psta->aid);
 369
 370         if ((psta->aid > 0) && (pstapriv->sta_aid[psta->aid - 1] == psta)) {
 371                 pstapriv->sta_aid[psta->aid - 1] = NULL;
 372                 psta->aid = 0;
 373         }
 374
 375         psta->under_exist_checking = 0;
 376
 377 #endif  /*  CONFIG_88EU_AP_MODE */
 378
 379         spin_lock_bh(&(pfree_sta_queue->lock));
 380         list_add_tail(&psta->list, get_list_head(pfree_sta_queue));
 381         spin_unlock_bh(&pfree_sta_queue->lock);
 382
 383 exit:
 384
 385
 386         return _SUCCESS;
 387 }
 388
 389 /*  free all stainfo which in sta_hash[all] */
 390 void rtw_free_all_stainfo(struct adapter *padapter)
 391 {
 392         struct list_head *plist, *phead;
 393         s32     index;
 394         struct sta_info *psta = NULL;
 395         struct  sta_priv *pstapriv = &padapter->stapriv;
 396         struct sta_info *pbcmc_stainfo = rtw_get_bcmc_stainfo(padapter);
 397
 398
 399         if (pstapriv->asoc_sta_count == 1)
 400                 return;
 401
 402         spin_lock_bh(&pstapriv->sta_hash_lock);
 403
 404         for (index = 0; index < NUM_STA; index++) {
 405                 phead = &(pstapriv->sta_hash[index]);
 406                 plist = phead->next;
 407
 408                 while (phead != plist) {
 409                         psta = container_of(plist, struct sta_info, hash_list);
 410
 411                         plist = plist->next;
 412
 413                         if (pbcmc_stainfo != psta)
 414                                 rtw_free_stainfo(padapter, psta);
 415                 }
 416         }
 417         spin_unlock_bh(&pstapriv->sta_hash_lock);
 418 }
 419
 420 /* any station allocated can be searched by hash list */
 421 struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 422 {
 423         struct list_head *plist, *phead;
 424         struct sta_info *psta = NULL;
 425         u32     index;
 426         u8 *addr;
 427         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 428
 429
 430         if (!hwaddr)
 431                 return NULL;
 432
 433         if (IS_MCAST(hwaddr))
 434                 addr = bc_addr;
 435         else
 436                 addr = hwaddr;
 437
 438         index = wifi_mac_hash(addr);
 439
 440         spin_lock_bh(&pstapriv->sta_hash_lock);
 441
 442         phead = &(pstapriv->sta_hash[index]);
 443         plist = phead->next;
 444
 445         while (phead != plist) {
 446                 psta = container_of(plist, struct sta_info, hash_list);
 447
 448                 if ((!memcmp(psta->hwaddr, addr, ETH_ALEN)) == true) {
 449                         /*  if found the matched address */
 450                         break;
 451                 }
 452                 psta = NULL;
 453                 plist = plist->next;
 454         }
 455
 456         spin_unlock_bh(&pstapriv->sta_hash_lock);
 457         return psta;
 458 }
 459
 460 u32 rtw_init_bcmc_stainfo(struct adapter *padapter)
 461 {
 462         struct sta_info         *psta;
 463         u32 res = _SUCCESS;
 464         unsigned char bcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 465         struct  sta_priv *pstapriv = &padapter->stapriv;
 466
 467
 468         psta = rtw_alloc_stainfo(pstapriv, bcast_addr);
 469
 470         if (!psta) {
 471                 res = _FAIL;
 472                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("rtw_alloc_stainfo fail"));
 473                 goto exit;
 474         }
 475
 476         /*  default broadcast & multicast use macid 1 */
 477         psta->mac_id = 1;
 478
 479 exit:
 480         return res;
 481 }
 482
 483 struct sta_info *rtw_get_bcmc_stainfo(struct adapter *padapter)
 484 {
 485         struct sta_priv         *pstapriv = &padapter->stapriv;
 486         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 487          return rtw_get_stainfo(pstapriv, bc_addr);
 488 }
 489
 490 u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr)
 491 {
 492         u8 res = true;
 493 #ifdef CONFIG_88EU_AP_MODE
 494         struct list_head *plist, *phead;
 495         struct rtw_wlan_acl_node *paclnode;
 496         u8 match = false;
 497         struct sta_priv *pstapriv = &padapter->stapriv;
 498         struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
 499         struct __queue *pacl_node_q = &pacl_list->acl_node_q;
 500
 501         spin_lock_bh(&(pacl_node_q->lock));
 502         phead = get_list_head(pacl_node_q);
 503         plist = phead->next;
 504         while (phead != plist) {
 505                 paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
 506                 plist = plist->next;
 507
 508                 if (!memcmp(paclnode->addr, mac_addr, ETH_ALEN)) {
 509                         if (paclnode->valid) {
 510                                 match = true;
 511                                 break;
 512                         }
 513                 }
 514         }
 515         spin_unlock_bh(&pacl_node_q->lock);
 516
 517         if (pacl_list->mode == 1)/* accept unless in deny list */
 518                 res = (match) ? false : true;
 519         else if (pacl_list->mode == 2)/* deny unless in accept list */
 520                 res = (match) ? true : false;
 521         else
 522                  res = true;
 523
 524 #endif
 525
 526         return res;
 527 }