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