kernel/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  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  *
  19  ******************************************************************************/
  20 #define _RTW_STA_MGT_C_
  21
  22 #include <osdep_service.h>
  23 #include <drv_types.h>
  24 #include <recv_osdep.h>
  25 #include <xmit_osdep.h>
  26 #include <mlme_osdep.h>
  27 #include <sta_info.h>
  28 #include <linux/vmalloc.h>
  29
  30 static void _rtw_init_stainfo(struct sta_info *psta)
  31 {
  32         memset((u8 *)psta, 0, sizeof(struct sta_info));
  33
  34          spin_lock_init(&psta->lock);
  35         INIT_LIST_HEAD(&psta->list);
  36         INIT_LIST_HEAD(&psta->hash_list);
  37         _rtw_init_queue(&psta->sleep_q);
  38         psta->sleepq_len = 0;
  39
  40         _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
  41         _rtw_init_sta_recv_priv(&psta->sta_recvpriv);
  42
  43 #ifdef CONFIG_88EU_AP_MODE
  44
  45         INIT_LIST_HEAD(&psta->asoc_list);
  46
  47         INIT_LIST_HEAD(&psta->auth_list);
  48
  49         psta->expire_to = 0;
  50
  51         psta->flags = 0;
  52
  53         psta->capability = 0;
  54
  55         psta->bpairwise_key_installed = false;
  56
  57 #ifdef CONFIG_88EU_AP_MODE
  58         psta->nonerp_set = 0;
  59         psta->no_short_slot_time_set = 0;
  60         psta->no_short_preamble_set = 0;
  61         psta->no_ht_gf_set = 0;
  62         psta->no_ht_set = 0;
  63         psta->ht_20mhz_set = 0;
  64 #endif
  65
  66         psta->under_exist_checking = 0;
  67
  68         psta->keep_alive_trycnt = 0;
  69
  70 #endif  /*  CONFIG_88EU_AP_MODE */
  71
  72 }
  73
  74 u32     _rtw_init_sta_priv(struct       sta_priv *pstapriv)
  75 {
  76         struct sta_info *psta;
  77         s32 i;
  78
  79
  80         pstapriv->pallocated_stainfo_buf = vzalloc(sizeof(struct sta_info) * NUM_STA + 4);
  81
  82         if (!pstapriv->pallocated_stainfo_buf)
  83                 return _FAIL;
  84
  85         pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
  86                 ((size_t)(pstapriv->pallocated_stainfo_buf) & 3);
  87
  88         _rtw_init_queue(&pstapriv->free_sta_queue);
  89
  90         spin_lock_init(&pstapriv->sta_hash_lock);
  91
  92         pstapriv->asoc_sta_count = 0;
  93         _rtw_init_queue(&pstapriv->sleep_q);
  94         _rtw_init_queue(&pstapriv->wakeup_q);
  95
  96         psta = (struct sta_info *)(pstapriv->pstainfo_buf);
  97
  98         for (i = 0; i < NUM_STA; i++) {
  99                 _rtw_init_stainfo(psta);
 100
 101                 INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));
 102
 103                 list_add_tail(&psta->list, get_list_head(&pstapriv->free_sta_queue));
 104
 105                 psta++;
 106         }
 107
 108 #ifdef CONFIG_88EU_AP_MODE
 109
 110         pstapriv->sta_dz_bitmap = 0;
 111         pstapriv->tim_bitmap = 0;
 112
 113         INIT_LIST_HEAD(&pstapriv->asoc_list);
 114         INIT_LIST_HEAD(&pstapriv->auth_list);
 115         spin_lock_init(&pstapriv->asoc_list_lock);
 116         spin_lock_init(&pstapriv->auth_list_lock);
 117         pstapriv->asoc_list_cnt = 0;
 118         pstapriv->auth_list_cnt = 0;
 119
 120         pstapriv->auth_to = 3; /*  3*2 = 6 sec */
 121         pstapriv->assoc_to = 3;
 122         pstapriv->expire_to = 3; /*  3*2 = 6 sec */
 123         pstapriv->max_num_sta = NUM_STA;
 124 #endif
 125
 126
 127         return _SUCCESS;
 128 }
 129
 130 inline int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta)
 131 {
 132         int offset = (((u8 *)sta) - stapriv->pstainfo_buf)/sizeof(struct sta_info);
 133
 134         if (!stainfo_offset_valid(offset))
 135                 DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
 136
 137         return offset;
 138 }
 139
 140 inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int offset)
 141 {
 142         if (!stainfo_offset_valid(offset))
 143                 DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
 144
 145         return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
 146 }
 147
 148 /*  this function is used to free the memory of lock || sema for all stainfos */
 149 static void rtw_mfree_all_stainfo(struct sta_priv *pstapriv)
 150 {
 151         struct list_head *plist, *phead;
 152         struct sta_info *psta = NULL;
 153
 154
 155         spin_lock_bh(&pstapriv->sta_hash_lock);
 156
 157         phead = get_list_head(&pstapriv->free_sta_queue);
 158         plist = phead->next;
 159
 160         while (phead != plist) {
 161                 psta = container_of(plist, struct sta_info , list);
 162                 plist = plist->next;
 163         }
 164
 165         spin_unlock_bh(&pstapriv->sta_hash_lock);
 166
 167 }
 168
 169 static void rtw_mfree_sta_priv_lock(struct sta_priv *pstapriv)
 170 {
 171          rtw_mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
 172 }
 173
 174 u32     _rtw_free_sta_priv(struct       sta_priv *pstapriv)
 175 {
 176         struct list_head *phead, *plist;
 177         struct sta_info *psta = NULL;
 178         struct recv_reorder_ctrl *preorder_ctrl;
 179         int     index;
 180
 181         if (pstapriv) {
 182                 /*      delete all reordering_ctrl_timer                */
 183                 spin_lock_bh(&pstapriv->sta_hash_lock);
 184                 for (index = 0; index < NUM_STA; index++) {
 185                         phead = &(pstapriv->sta_hash[index]);
 186                         plist = phead->next;
 187
 188                         while (phead != plist) {
 189                                 int i;
 190                                 psta = container_of(plist, struct sta_info , hash_list);
 191                                 plist = plist->next;
 192
 193                                 for (i = 0; i < 16; i++) {
 194                                         preorder_ctrl = &psta->recvreorder_ctrl[i];
 195                                         del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
 196                                 }
 197                         }
 198                 }
 199                 spin_unlock_bh(&pstapriv->sta_hash_lock);
 200                 /*===============================*/
 201
 202                 rtw_mfree_sta_priv_lock(pstapriv);
 203
 204                 if (pstapriv->pallocated_stainfo_buf)
 205                         vfree(pstapriv->pallocated_stainfo_buf);
 206         }
 207
 208         return _SUCCESS;
 209 }
 210
 211 struct  sta_info *rtw_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 212 {
 213         s32     index;
 214         struct list_head *phash_list;
 215         struct sta_info *psta;
 216         struct __queue *pfree_sta_queue;
 217         struct recv_reorder_ctrl *preorder_ctrl;
 218         int i = 0;
 219         u16  wRxSeqInitialValue = 0xffff;
 220
 221
 222         pfree_sta_queue = &pstapriv->free_sta_queue;
 223
 224         spin_lock_bh(&(pfree_sta_queue->lock));
 225
 226         if (list_empty(&pfree_sta_queue->queue)) {
 227                 spin_unlock_bh(&pfree_sta_queue->lock);
 228                 psta = NULL;
 229         } else {
 230                 psta = container_of((&pfree_sta_queue->queue)->next, struct sta_info, list);
 231                 list_del_init(&(psta->list));
 232                 spin_unlock_bh(&pfree_sta_queue->lock);
 233                 _rtw_init_stainfo(psta);
 234                 memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
 235                 index = wifi_mac_hash(hwaddr);
 236                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_, ("rtw_alloc_stainfo: index=%x", index));
 237                 if (index >= NUM_STA) {
 238                         RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("ERROR => rtw_alloc_stainfo: index >= NUM_STA"));
 239                         psta = NULL;
 240                         goto exit;
 241                 }
 242                 phash_list = &(pstapriv->sta_hash[index]);
 243
 244                 spin_lock_bh(&(pstapriv->sta_hash_lock));
 245
 246                 list_add_tail(&psta->hash_list, phash_list);
 247
 248                 pstapriv->asoc_sta_count++;
 249
 250                 spin_unlock_bh(&pstapriv->sta_hash_lock);
 251
 252 /*  Commented by Albert 2009/08/13 */
 253 /*  For the SMC router, the sequence number of first packet of WPS handshake will be 0. */
 254 /*  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. */
 255 /*  So, we initialize the tid_rxseq variable as the 0xffff. */
 256
 257                 for (i = 0; i < 16; i++)
 258                         memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i], &wRxSeqInitialValue, 2);
 259
 260                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_,
 261                          ("alloc number_%d stainfo  with hwaddr = %pM\n",
 262                          pstapriv->asoc_sta_count , hwaddr));
 263
 264                 init_addba_retry_timer(pstapriv->padapter, psta);
 265
 266                 /* for A-MPDU Rx reordering buffer control */
 267                 for (i = 0; i < 16; i++) {
 268                         preorder_ctrl = &psta->recvreorder_ctrl[i];
 269
 270                         preorder_ctrl->padapter = pstapriv->padapter;
 271
 272                         preorder_ctrl->enable = false;
 273
 274                         preorder_ctrl->indicate_seq = 0xffff;
 275                         preorder_ctrl->wend_b = 0xffff;
 276                         preorder_ctrl->wsize_b = 64;/* 64; */
 277
 278                         _rtw_init_queue(&preorder_ctrl->pending_recvframe_queue);
 279
 280                         rtw_init_recv_timer(preorder_ctrl);
 281                 }
 282
 283                 /* init for DM */
 284                 psta->rssi_stat.UndecoratedSmoothedPWDB = (-1);
 285                 psta->rssi_stat.UndecoratedSmoothedCCK = (-1);
 286
 287                 /* init for the sequence number of received management frame */
 288                 psta->RxMgmtFrameSeqNum = 0xffff;
 289         }
 290
 291 exit:
 292         return psta;
 293 }
 294
 295 /*  using pstapriv->sta_hash_lock to protect */
 296 u32     rtw_free_stainfo(struct adapter *padapter , struct sta_info *psta)
 297 {
 298         int i;
 299         struct __queue *pfree_sta_queue;
 300         struct recv_reorder_ctrl *preorder_ctrl;
 301         struct  sta_xmit_priv   *pstaxmitpriv;
 302         struct  xmit_priv       *pxmitpriv = &padapter->xmitpriv;
 303         struct  sta_priv *pstapriv = &padapter->stapriv;
 304
 305
 306         if (psta == NULL)
 307                 goto exit;
 308
 309         pfree_sta_queue = &pstapriv->free_sta_queue;
 310
 311         pstaxmitpriv = &psta->sta_xmitpriv;
 312
 313         spin_lock_bh(&pxmitpriv->lock);
 314
 315         rtw_free_xmitframe_queue(pxmitpriv, &psta->sleep_q);
 316         psta->sleepq_len = 0;
 317
 318         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
 319
 320         list_del_init(&(pstaxmitpriv->vo_q.tx_pending));
 321
 322         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
 323
 324         list_del_init(&(pstaxmitpriv->vi_q.tx_pending));
 325
 326         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
 327
 328         list_del_init(&(pstaxmitpriv->bk_q.tx_pending));
 329
 330         rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
 331
 332         list_del_init(&(pstaxmitpriv->be_q.tx_pending));
 333
 334         spin_unlock_bh(&pxmitpriv->lock);
 335
 336         list_del_init(&psta->hash_list);
 337         RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("\n free number_%d stainfo  with hwaddr=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x\n", pstapriv->asoc_sta_count , psta->hwaddr[0], psta->hwaddr[1], psta->hwaddr[2], psta->hwaddr[3], psta->hwaddr[4], psta->hwaddr[5]));
 338         pstapriv->asoc_sta_count--;
 339
 340         /*  re-init sta_info; 20061114 */
 341         _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
 342         _rtw_init_sta_recv_priv(&psta->sta_recvpriv);
 343
 344         del_timer_sync(&psta->addba_retry_timer);
 345
 346         /* for A-MPDU Rx reordering buffer control, cancel reordering_ctrl_timer */
 347         for (i = 0; i < 16; i++) {
 348                 struct list_head *phead, *plist;
 349                 struct recv_frame *prhdr;
 350                 struct recv_frame *prframe;
 351                 struct __queue *ppending_recvframe_queue;
 352                 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
 353
 354                 preorder_ctrl = &psta->recvreorder_ctrl[i];
 355
 356                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
 357
 358                 ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
 359
 360                 spin_lock_bh(&ppending_recvframe_queue->lock);
 361
 362                 phead =         get_list_head(ppending_recvframe_queue);
 363                 plist = phead->next;
 364
 365                 while (!list_empty(phead)) {
 366                         prhdr = container_of(plist, struct recv_frame, list);
 367                         prframe = (struct recv_frame *)prhdr;
 368
 369                         plist = plist->next;
 370
 371                         list_del_init(&(prframe->list));
 372
 373                         rtw_free_recvframe(prframe, pfree_recv_queue);
 374                 }
 375
 376                 spin_unlock_bh(&ppending_recvframe_queue->lock);
 377         }
 378
 379         if (!(psta->state & WIFI_AP_STATE))
 380                 rtw_hal_set_odm_var(padapter, HAL_ODM_STA_INFO, psta, false);
 381
 382 #ifdef CONFIG_88EU_AP_MODE
 383
 384         spin_lock_bh(&pstapriv->auth_list_lock);
 385         if (!list_empty(&psta->auth_list)) {
 386                 list_del_init(&psta->auth_list);
 387                 pstapriv->auth_list_cnt--;
 388         }
 389         spin_unlock_bh(&pstapriv->auth_list_lock);
 390
 391         psta->expire_to = 0;
 392
 393         psta->sleepq_ac_len = 0;
 394         psta->qos_info = 0;
 395
 396         psta->max_sp_len = 0;
 397         psta->uapsd_bk = 0;
 398         psta->uapsd_be = 0;
 399         psta->uapsd_vi = 0;
 400         psta->uapsd_vo = 0;
 401         psta->has_legacy_ac = 0;
 402
 403         pstapriv->sta_dz_bitmap &= ~BIT(psta->aid);
 404         pstapriv->tim_bitmap &= ~BIT(psta->aid);
 405
 406         if ((psta->aid > 0) && (pstapriv->sta_aid[psta->aid - 1] == psta)) {
 407                 pstapriv->sta_aid[psta->aid - 1] = NULL;
 408                 psta->aid = 0;
 409         }
 410
 411         psta->under_exist_checking = 0;
 412
 413 #endif  /*  CONFIG_88EU_AP_MODE */
 414
 415         spin_lock_bh(&(pfree_sta_queue->lock));
 416         list_add_tail(&psta->list, get_list_head(pfree_sta_queue));
 417         spin_unlock_bh(&pfree_sta_queue->lock);
 418
 419 exit:
 420
 421
 422         return _SUCCESS;
 423 }
 424
 425 /*  free all stainfo which in sta_hash[all] */
 426 void rtw_free_all_stainfo(struct adapter *padapter)
 427 {
 428         struct list_head *plist, *phead;
 429         s32     index;
 430         struct sta_info *psta = NULL;
 431         struct  sta_priv *pstapriv = &padapter->stapriv;
 432         struct sta_info *pbcmc_stainfo = rtw_get_bcmc_stainfo(padapter);
 433
 434
 435         if (pstapriv->asoc_sta_count == 1)
 436                 return;
 437
 438         spin_lock_bh(&pstapriv->sta_hash_lock);
 439
 440         for (index = 0; index < NUM_STA; index++) {
 441                 phead = &(pstapriv->sta_hash[index]);
 442                 plist = phead->next;
 443
 444                 while (phead != plist) {
 445                         psta = container_of(plist, struct sta_info , hash_list);
 446
 447                         plist = plist->next;
 448
 449                         if (pbcmc_stainfo != psta)
 450                                 rtw_free_stainfo(padapter , psta);
 451                 }
 452         }
 453         spin_unlock_bh(&pstapriv->sta_hash_lock);
 454 }
 455
 456 /* any station allocated can be searched by hash list */
 457 struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 458 {
 459         struct list_head *plist, *phead;
 460         struct sta_info *psta = NULL;
 461         u32     index;
 462         u8 *addr;
 463         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 464
 465
 466         if (hwaddr == NULL)
 467                 return NULL;
 468
 469         if (IS_MCAST(hwaddr))
 470                 addr = bc_addr;
 471         else
 472                 addr = hwaddr;
 473
 474         index = wifi_mac_hash(addr);
 475
 476         spin_lock_bh(&pstapriv->sta_hash_lock);
 477
 478         phead = &(pstapriv->sta_hash[index]);
 479         plist = phead->next;
 480
 481         while (phead != plist) {
 482                 psta = container_of(plist, struct sta_info, hash_list);
 483
 484                 if ((!memcmp(psta->hwaddr, addr, ETH_ALEN)) == true) {
 485                         /*  if found the matched address */
 486                         break;
 487                 }
 488                 psta = NULL;
 489                 plist = plist->next;
 490         }
 491
 492         spin_unlock_bh(&pstapriv->sta_hash_lock);
 493         return psta;
 494 }
 495
 496 u32 rtw_init_bcmc_stainfo(struct adapter *padapter)
 497 {
 498         struct sta_info         *psta;
 499         u32 res = _SUCCESS;
 500         unsigned char bcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 501         struct  sta_priv *pstapriv = &padapter->stapriv;
 502
 503
 504         psta = rtw_alloc_stainfo(pstapriv, bcast_addr);
 505
 506         if (psta == NULL) {
 507                 res = _FAIL;
 508                 RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("rtw_alloc_stainfo fail"));
 509                 goto exit;
 510         }
 511
 512         /*  default broadcast & multicast use macid 1 */
 513         psta->mac_id = 1;
 514
 515 exit:
 516         return res;
 517 }
 518
 519 struct sta_info *rtw_get_bcmc_stainfo(struct adapter *padapter)
 520 {
 521         struct sta_info         *psta;
 522         struct sta_priv         *pstapriv = &padapter->stapriv;
 523         u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 524          psta = rtw_get_stainfo(pstapriv, bc_addr);
 525         return psta;
 526 }
 527
 528 u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr)
 529 {
 530         u8 res = true;
 531 #ifdef CONFIG_88EU_AP_MODE
 532         struct list_head *plist, *phead;
 533         struct rtw_wlan_acl_node *paclnode;
 534         u8 match = false;
 535         struct sta_priv *pstapriv = &padapter->stapriv;
 536         struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
 537         struct __queue *pacl_node_q = &pacl_list->acl_node_q;
 538
 539         spin_lock_bh(&(pacl_node_q->lock));
 540         phead = get_list_head(pacl_node_q);
 541         plist = phead->next;
 542         while (phead != plist) {
 543                 paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
 544                 plist = plist->next;
 545
 546                 if (!memcmp(paclnode->addr, mac_addr, ETH_ALEN)) {
 547                         if (paclnode->valid) {
 548                                 match = true;
 549                                 break;
 550                         }
 551                 }
 552         }
 553         spin_unlock_bh(&pacl_node_q->lock);
 554
 555         if (pacl_list->mode == 1)/* accept unless in deny list */
 556                 res = (match) ? false : true;
 557         else if (pacl_list->mode == 2)/* deny unless in accept list */
 558                 res = (match) ? true : false;
 559         else
 560                  res = true;
 561
 562 #endif
 563
 564         return res;
 565 }