/******************************************************************************
 *
 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 ******************************************************************************/
#define _RTW_STA_MGT_C_

#include <osdep_service.h>
#include <drv_types.h>
#include <recv_osdep.h>
#include <xmit_osdep.h>
#include <mlme_osdep.h>
#include <sta_info.h>
#include <linux/vmalloc.h>

static void _rtw_init_stainfo(struct sta_info *psta)
{
        memset((u8 *)psta, 0, sizeof(struct sta_info));

         spin_lock_init(&psta->lock);
        INIT_LIST_HEAD(&psta->list);
        INIT_LIST_HEAD(&psta->hash_list);
        _rtw_init_queue(&psta->sleep_q);
        psta->sleepq_len = 0;

        _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
        _rtw_init_sta_recv_priv(&psta->sta_recvpriv);

#ifdef CONFIG_88EU_AP_MODE

        INIT_LIST_HEAD(&psta->asoc_list);

        INIT_LIST_HEAD(&psta->auth_list);

        psta->expire_to = 0;

        psta->flags = 0;

        psta->capability = 0;

        psta->bpairwise_key_installed = false;

        psta->nonerp_set = 0;
        psta->no_short_slot_time_set = 0;
        psta->no_short_preamble_set = 0;
        psta->no_ht_gf_set = 0;
        psta->no_ht_set = 0;
        psta->ht_20mhz_set = 0;

        psta->under_exist_checking = 0;

        psta->keep_alive_trycnt = 0;

#endif  /*  CONFIG_88EU_AP_MODE */
}

u32     _rtw_init_sta_priv(struct       sta_priv *pstapriv)
{
        struct sta_info *psta;
        s32 i;

        pstapriv->pallocated_stainfo_buf = vzalloc(sizeof(struct sta_info) * NUM_STA + 4);

        if (!pstapriv->pallocated_stainfo_buf)
                return _FAIL;

        pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
                ((size_t)(pstapriv->pallocated_stainfo_buf) & 3);

        _rtw_init_queue(&pstapriv->free_sta_queue);

        spin_lock_init(&pstapriv->sta_hash_lock);

        pstapriv->asoc_sta_count = 0;
        _rtw_init_queue(&pstapriv->sleep_q);
        _rtw_init_queue(&pstapriv->wakeup_q);

        psta = (struct sta_info *)(pstapriv->pstainfo_buf);

        for (i = 0; i < NUM_STA; i++) {
                _rtw_init_stainfo(psta);

                INIT_LIST_HEAD(&(pstapriv->sta_hash[i]));

                list_add_tail(&psta->list, get_list_head(&pstapriv->free_sta_queue));

                psta++;
        }

#ifdef CONFIG_88EU_AP_MODE

        pstapriv->sta_dz_bitmap = 0;
        pstapriv->tim_bitmap = 0;

        INIT_LIST_HEAD(&pstapriv->asoc_list);
        INIT_LIST_HEAD(&pstapriv->auth_list);
        spin_lock_init(&pstapriv->asoc_list_lock);
        spin_lock_init(&pstapriv->auth_list_lock);
        pstapriv->asoc_list_cnt = 0;
        pstapriv->auth_list_cnt = 0;

        pstapriv->auth_to = 3; /*  3*2 = 6 sec */
        pstapriv->assoc_to = 3;
        pstapriv->expire_to = 3; /*  3*2 = 6 sec */
        pstapriv->max_num_sta = NUM_STA;
#endif

        return _SUCCESS;
}

inline int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta)
{
        int offset = (((u8 *)sta) - stapriv->pstainfo_buf)/sizeof(struct sta_info);

        if (!stainfo_offset_valid(offset))
                DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);

        return offset;
}

inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int offset)
{
        if (!stainfo_offset_valid(offset))
                DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);

        return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
}

u32     _rtw_free_sta_priv(struct       sta_priv *pstapriv)
{
        struct list_head *phead, *plist;
        struct sta_info *psta = NULL;
        struct recv_reorder_ctrl *preorder_ctrl;
        int     index;

        if (pstapriv) {
                /*      delete all reordering_ctrl_timer                */
                spin_lock_bh(&pstapriv->sta_hash_lock);
                for (index = 0; index < NUM_STA; index++) {
                        phead = &(pstapriv->sta_hash[index]);
                        plist = phead->next;

                        while (phead != plist) {
                                int i;

                                psta = container_of(plist, struct sta_info,
                                                    hash_list);
                                plist = plist->next;

                                for (i = 0; i < 16; i++) {
                                        preorder_ctrl = &psta->recvreorder_ctrl[i];
                                        del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
                                }
                        }
                }
                spin_unlock_bh(&pstapriv->sta_hash_lock);
                /*===============================*/

                vfree(pstapriv->pallocated_stainfo_buf);
        }

        return _SUCCESS;
}

struct sta_info *rtw_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
{
        s32 index;
        struct list_head *phash_list;
        struct sta_info *psta;
        struct __queue *pfree_sta_queue;
        struct recv_reorder_ctrl *preorder_ctrl;
        int i = 0;
        u16  wRxSeqInitialValue = 0xffff;

        pfree_sta_queue = &pstapriv->free_sta_queue;

        spin_lock_bh(&pfree_sta_queue->lock);
        psta = list_first_entry_or_null(&pfree_sta_queue->queue,
                                        struct sta_info, list);
        if (!psta) {
                spin_unlock_bh(&pfree_sta_queue->lock);
        } else {
                list_del_init(&psta->list);
                spin_unlock_bh(&pfree_sta_queue->lock);
                _rtw_init_stainfo(psta);
                memcpy(psta->hwaddr, hwaddr, ETH_ALEN);
                index = wifi_mac_hash(hwaddr);
                RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_, ("%s: index=%x", __func__, index));
                if (index >= NUM_STA) {
                        RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("ERROR => %s: index >= NUM_STA", __func__));
                        psta = NULL;
                        goto exit;
                }
                phash_list = &pstapriv->sta_hash[index];

                spin_lock_bh(&pstapriv->sta_hash_lock);
                list_add_tail(&psta->hash_list, phash_list);
                pstapriv->asoc_sta_count++;
                spin_unlock_bh(&pstapriv->sta_hash_lock);

/*  Commented by Albert 2009/08/13 */
/*  For the SMC router, the sequence number of first packet of WPS handshake will be 0. */
/*  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. */
/*  So, we initialize the tid_rxseq variable as the 0xffff. */

                for (i = 0; i < 16; i++)
                        memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i], &wRxSeqInitialValue, 2);

                RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_,
                         ("alloc number_%d stainfo  with hwaddr = %pM\n",
                         pstapriv->asoc_sta_count, hwaddr));

                init_addba_retry_timer(pstapriv->padapter, psta);

                /* for A-MPDU Rx reordering buffer control */
                for (i = 0; i < 16; i++) {
                        preorder_ctrl = &psta->recvreorder_ctrl[i];

                        preorder_ctrl->padapter = pstapriv->padapter;

                        preorder_ctrl->enable = false;

                        preorder_ctrl->indicate_seq = 0xffff;
                        preorder_ctrl->wend_b = 0xffff;
                        preorder_ctrl->wsize_b = 64;/* 64; */

                        _rtw_init_queue(&preorder_ctrl->pending_recvframe_queue);

                        rtw_init_recv_timer(preorder_ctrl);
                }

                /* init for DM */
                psta->rssi_stat.UndecoratedSmoothedPWDB = -1;
                psta->rssi_stat.UndecoratedSmoothedCCK = -1;

                /* init for the sequence number of received management frame */
                psta->RxMgmtFrameSeqNum = 0xffff;
        }

exit:
        return psta;
}

/*  using pstapriv->sta_hash_lock to protect */
u32     rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
{
        int i;
        struct __queue *pfree_sta_queue;
        struct recv_reorder_ctrl *preorder_ctrl;
        struct  sta_xmit_priv   *pstaxmitpriv;
        struct  xmit_priv       *pxmitpriv = &padapter->xmitpriv;
        struct  sta_priv *pstapriv = &padapter->stapriv;

        if (!psta)
                goto exit;

        pfree_sta_queue = &pstapriv->free_sta_queue;

        pstaxmitpriv = &psta->sta_xmitpriv;

        spin_lock_bh(&pxmitpriv->lock);

        rtw_free_xmitframe_queue(pxmitpriv, &psta->sleep_q);
        psta->sleepq_len = 0;

        rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);

        list_del_init(&(pstaxmitpriv->vo_q.tx_pending));

        rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);

        list_del_init(&(pstaxmitpriv->vi_q.tx_pending));

        rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);

        list_del_init(&(pstaxmitpriv->bk_q.tx_pending));

        rtw_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);

        list_del_init(&(pstaxmitpriv->be_q.tx_pending));

        spin_unlock_bh(&pxmitpriv->lock);

        list_del_init(&psta->hash_list);
        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]));
        pstapriv->asoc_sta_count--;

        /*  re-init sta_info; 20061114 */
        _rtw_init_sta_xmit_priv(&psta->sta_xmitpriv);
        _rtw_init_sta_recv_priv(&psta->sta_recvpriv);

        del_timer_sync(&psta->addba_retry_timer);

        /* for A-MPDU Rx reordering buffer control, cancel reordering_ctrl_timer */
        for (i = 0; i < 16; i++) {
                struct list_head *phead, *plist;
                struct recv_frame *prframe;
                struct __queue *ppending_recvframe_queue;
                struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;

                preorder_ctrl = &psta->recvreorder_ctrl[i];

                del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);

                ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;

                spin_lock_bh(&ppending_recvframe_queue->lock);

                phead =         get_list_head(ppending_recvframe_queue);
                plist = phead->next;

                while (!list_empty(phead)) {
                        prframe = container_of(plist, struct recv_frame, list);

                        plist = plist->next;

                        list_del_init(&(prframe->list));

                        rtw_free_recvframe(prframe, pfree_recv_queue);
                }

                spin_unlock_bh(&ppending_recvframe_queue->lock);
        }

        if (!(psta->state & WIFI_AP_STATE))
                rtw_hal_set_odm_var(padapter, HAL_ODM_STA_INFO, psta, false);

#ifdef CONFIG_88EU_AP_MODE

        spin_lock_bh(&pstapriv->auth_list_lock);
        if (!list_empty(&psta->auth_list)) {
                list_del_init(&psta->auth_list);
                pstapriv->auth_list_cnt--;
        }
        spin_unlock_bh(&pstapriv->auth_list_lock);

        psta->expire_to = 0;

        psta->sleepq_ac_len = 0;
        psta->qos_info = 0;

        psta->max_sp_len = 0;
        psta->uapsd_bk = 0;
        psta->uapsd_be = 0;
        psta->uapsd_vi = 0;
        psta->uapsd_vo = 0;
        psta->has_legacy_ac = 0;

        pstapriv->sta_dz_bitmap &= ~BIT(psta->aid);
        pstapriv->tim_bitmap &= ~BIT(psta->aid);

        if ((psta->aid > 0) && (pstapriv->sta_aid[psta->aid - 1] == psta)) {
                pstapriv->sta_aid[psta->aid - 1] = NULL;
                psta->aid = 0;
        }

        psta->under_exist_checking = 0;

#endif  /*  CONFIG_88EU_AP_MODE */

        spin_lock_bh(&(pfree_sta_queue->lock));
        list_add_tail(&psta->list, get_list_head(pfree_sta_queue));
        spin_unlock_bh(&pfree_sta_queue->lock);

exit:

        return _SUCCESS;
}

/*  free all stainfo which in sta_hash[all] */
void rtw_free_all_stainfo(struct adapter *padapter)
{
        struct list_head *plist, *phead;
        s32     index;
        struct sta_info *psta = NULL;
        struct  sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *pbcmc_stainfo = rtw_get_bcmc_stainfo(padapter);

        if (pstapriv->asoc_sta_count == 1)
                return;

        spin_lock_bh(&pstapriv->sta_hash_lock);

        for (index = 0; index < NUM_STA; index++) {
                phead = &(pstapriv->sta_hash[index]);
                plist = phead->next;

                while (phead != plist) {
                        psta = container_of(plist, struct sta_info, hash_list);

                        plist = plist->next;

                        if (pbcmc_stainfo != psta)
                                rtw_free_stainfo(padapter, psta);
                }
        }
        spin_unlock_bh(&pstapriv->sta_hash_lock);
}

/* any station allocated can be searched by hash list */
struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
{
        struct list_head *plist, *phead;
        struct sta_info *psta = NULL;
        u32     index;
        u8 *addr;
        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

        if (!hwaddr)
                return NULL;

        if (IS_MCAST(hwaddr))
                addr = bc_addr;
        else
                addr = hwaddr;

        index = wifi_mac_hash(addr);

        spin_lock_bh(&pstapriv->sta_hash_lock);

        phead = &(pstapriv->sta_hash[index]);
        plist = phead->next;

        while (phead != plist) {
                psta = container_of(plist, struct sta_info, hash_list);

                if ((!memcmp(psta->hwaddr, addr, ETH_ALEN)) == true) {
                        /*  if found the matched address */
                        break;
                }
                psta = NULL;
                plist = plist->next;
        }

        spin_unlock_bh(&pstapriv->sta_hash_lock);
        return psta;
}

u32 rtw_init_bcmc_stainfo(struct adapter *padapter)
{
        struct sta_info         *psta;
        u32 res = _SUCCESS;
        unsigned char bcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
        struct  sta_priv *pstapriv = &padapter->stapriv;

        psta = rtw_alloc_stainfo(pstapriv, bcast_addr);

        if (!psta) {
                res = _FAIL;
                RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_, ("rtw_alloc_stainfo fail"));
                goto exit;
        }

        /*  default broadcast & multicast use macid 1 */
        psta->mac_id = 1;

exit:
        return res;
}

struct sta_info *rtw_get_bcmc_stainfo(struct adapter *padapter)
{
        struct sta_priv         *pstapriv = &padapter->stapriv;
        u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
         return rtw_get_stainfo(pstapriv, bc_addr);
}

u8 rtw_access_ctrl(struct adapter *padapter, u8 *mac_addr)
{
        u8 res = true;
#ifdef CONFIG_88EU_AP_MODE
        struct list_head *plist, *phead;
        struct rtw_wlan_acl_node *paclnode;
        u8 match = false;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
        struct __queue *pacl_node_q = &pacl_list->acl_node_q;

        spin_lock_bh(&(pacl_node_q->lock));
        phead = get_list_head(pacl_node_q);
        plist = phead->next;
        while (phead != plist) {
                paclnode = container_of(plist, struct rtw_wlan_acl_node, list);
                plist = plist->next;

                if (!memcmp(paclnode->addr, mac_addr, ETH_ALEN)) {
                        if (paclnode->valid) {
                                match = true;
                                break;
                        }
                }
        }
        spin_unlock_bh(&pacl_node_q->lock);

        if (pacl_list->mode == 1)/* accept unless in deny list */
                res = (match) ? false : true;
        else if (pacl_list->mode == 2)/* deny unless in accept list */
                res = (match) ? true : false;
        else
                 res = true;

#endif

        return res;
}