/******************************************************************************
 *
 * 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 <rtl8723a_hal.h>

static const u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};

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_queue23a(&psta->sleep_q);
        psta->sleepq_len = 0;
        _rtw_init_sta_xmit_priv23a(&psta->sta_xmitpriv);
        _rtw_init_sta_recv_priv23a(&psta->sta_recvpriv);
#ifdef CONFIG_8723AU_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->keep_alive_trycnt = 0;
#endif  /*  CONFIG_8723AU_AP_MODE */
}

int _rtw_init_sta_priv23a(struct sta_priv *pstapriv)
{
        int i;

        spin_lock_init(&pstapriv->sta_hash_lock);
        pstapriv->asoc_sta_count = 0;
        for (i = 0; i < NUM_STA; i++)
                INIT_LIST_HEAD(&pstapriv->sta_hash[i]);

#ifdef CONFIG_8723AU_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 = 900;  900*2 = 1800 sec = 30 min,
            expire after no any traffic. */
        /* pstapriv->expire_to = 30;  30*2 = 60 sec = 1 min,
            expire after no any traffic. */
        pstapriv->expire_to = 3; /*  3*2 = 6 sec */
        pstapriv->max_num_sta = NUM_STA;
#endif
        return _SUCCESS;
}

int _rtw_free_sta_priv23a(struct sta_priv *pstapriv)
{
        struct list_head *phead, *plist, *ptmp;
        struct sta_info *psta;
        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];

                        list_for_each_safe(plist, ptmp, phead) {
                                int i;

                                psta = container_of(plist, struct sta_info,
                                                    hash_list);
                                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);
                /*===============================*/
        }
        return _SUCCESS;
}

struct sta_info *
rtw_alloc_stainfo23a(struct sta_priv *pstapriv, const u8 *hwaddr, gfp_t gfp)
{
        struct list_head        *phash_list;
        struct sta_info *psta;
        struct recv_reorder_ctrl *preorder_ctrl;
        s32     index;
        int i = 0;
        u16  wRxSeqInitialValue = 0xffff;

        psta = kmalloc(sizeof(struct sta_info), gfp);
        if (!psta)
                return NULL;

        spin_lock_bh(&pstapriv->sta_hash_lock);

        _rtw_init_stainfo(psta);

        psta->padapter = pstapriv->padapter;

        ether_addr_copy(psta->hwaddr, hwaddr);

        index = wifi_mac_hash(hwaddr);

        RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_,
                 "rtw_alloc_stainfo23a: index  = %x\n", index);
        if (index >= NUM_STA) {
                RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_,
                         "ERROR => rtw_alloc_stainfo23a: index >= NUM_STA\n");
                psta = NULL;
                goto exit;
        }
        phash_list = &pstapriv->sta_hash[index];

        list_add_tail(&psta->hash_list, phash_list);

        pstapriv->asoc_sta_count++;

/*  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_timer23a(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 = (NR_RECVBUFF-2); */
                preorder_ctrl->wsize_b = 64;/* 64; */

                _rtw_init_queue23a(&preorder_ctrl->pending_recvframe_queue);

                rtw_init_recv_timer23a(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:
        spin_unlock_bh(&pstapriv->sta_hash_lock);
        return psta;
}

/*  using pstapriv->sta_hash_lock to protect */
int rtw_free_stainfo23a(struct rtw_adapter *padapter, struct sta_info *psta)
{
        struct recv_reorder_ctrl *preorder_ctrl;
        struct  sta_xmit_priv   *pstaxmitpriv;
        struct  xmit_priv       *pxmitpriv = &padapter->xmitpriv;
        struct  sta_priv *pstapriv = &padapter->stapriv;
        struct hw_xmit *phwxmit;
        int i;

        if (psta == NULL)
                goto exit;

        spin_lock_bh(&psta->lock);
        psta->state &= ~_FW_LINKED;
        spin_unlock_bh(&psta->lock);

        pstaxmitpriv = &psta->sta_xmitpriv;

        spin_lock_bh(&pxmitpriv->lock);

        rtw_free_xmitframe_queue23a(pxmitpriv, &psta->sleep_q);
        psta->sleepq_len = 0;

        /* vo */
        rtw_free_xmitframe_queue23a(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
        list_del_init(&pstaxmitpriv->vo_q.tx_pending);
        phwxmit = pxmitpriv->hwxmits;
        phwxmit->accnt -= pstaxmitpriv->vo_q.qcnt;
        pstaxmitpriv->vo_q.qcnt = 0;

        /* vi */
        rtw_free_xmitframe_queue23a(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
        list_del_init(&pstaxmitpriv->vi_q.tx_pending);
        phwxmit = pxmitpriv->hwxmits+1;
        phwxmit->accnt -= pstaxmitpriv->vi_q.qcnt;
        pstaxmitpriv->vi_q.qcnt = 0;

        /* be */
        rtw_free_xmitframe_queue23a(pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
        list_del_init(&pstaxmitpriv->be_q.tx_pending);
        phwxmit = pxmitpriv->hwxmits+2;
        phwxmit->accnt -= pstaxmitpriv->be_q.qcnt;
        pstaxmitpriv->be_q.qcnt = 0;

        /* bk */
        rtw_free_xmitframe_queue23a(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
        list_del_init(&pstaxmitpriv->bk_q.tx_pending);
        phwxmit = pxmitpriv->hwxmits+3;
        phwxmit->accnt -= pstaxmitpriv->bk_q.qcnt;
        pstaxmitpriv->bk_q.qcnt = 0;

        spin_unlock_bh(&pxmitpriv->lock);

        list_del_init(&psta->hash_list);
        RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_,
                 "free number_%d stainfo  with hwaddr = %pM\n",
                 pstapriv->asoc_sta_count, psta->hwaddr);
        pstapriv->asoc_sta_count--;

        /*  re-init sta_info; 20061114  will be init in alloc_stainfo */
        /* _rtw_init_sta_xmit_priv23a(&psta->sta_xmitpriv); */
        /* _rtw_init_sta_recv_priv23a(&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 rtw_queue *ppending_recvframe_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_recvframe23a(prframe);
                }
                spin_unlock_bh(&ppending_recvframe_queue->lock);
        }
        if (!(psta->state & WIFI_AP_STATE))
                rtl8723a_SetHalODMVar(padapter, HAL_ODM_STA_INFO, psta, false);
#ifdef CONFIG_8723AU_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 &= ~CHKBIT(psta->aid);
        pstapriv->tim_bitmap &= ~CHKBIT(psta->aid);

        if ((psta->aid > 0) && (pstapriv->sta_aid[psta->aid - 1] == psta)) {
                pstapriv->sta_aid[psta->aid - 1] = NULL;
                psta->aid = 0;
        }
#endif  /*  CONFIG_8723AU_AP_MODE */

        kfree(psta);
exit:
        return _SUCCESS;
}

/*  free all stainfo which in sta_hash[all] */
void rtw_free_all_stainfo23a(struct rtw_adapter *padapter)
{
        struct list_head *plist, *phead, *ptmp;
        struct sta_info *psta;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info *pbcmc_stainfo = rtw_get_bcmc_stainfo23a(padapter);
        s32 index;

        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];

                list_for_each_safe(plist, ptmp, phead) {
                        psta = container_of(plist, struct sta_info, hash_list);

                        if (pbcmc_stainfo != psta)
                                rtw_free_stainfo23a(padapter, psta);
                }
        }
        spin_unlock_bh(&pstapriv->sta_hash_lock);
}

/* any station allocated can be searched by hash list */
struct sta_info *rtw_get_stainfo23a(struct sta_priv *pstapriv, const u8 *hwaddr)
{
        struct list_head *plist, *phead;
        struct sta_info *psta = NULL;
        u32     index;
        const u8 *addr;

        if (hwaddr == NULL)
                return NULL;

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

        index = wifi_mac_hash(addr);

        spin_lock_bh(&pstapriv->sta_hash_lock);

        phead = &pstapriv->sta_hash[index];

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

                /*  if found the matched address */
                if (ether_addr_equal(psta->hwaddr, addr))
                        break;

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

int rtw_init_bcmc_stainfo23a(struct rtw_adapter *padapter)
{
        struct  sta_priv *pstapriv = &padapter->stapriv;
        struct sta_info         *psta;
        struct tx_servq *ptxservq;
        int res = _SUCCESS;

        psta = rtw_alloc_stainfo23a(pstapriv, bc_addr, GFP_KERNEL);
        if (psta == NULL) {
                res = _FAIL;
                RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_err_,
                         "rtw_alloc_stainfo23a fail\n");
                return res;
        }
        /*  default broadcast & multicast use macid 1 */
        psta->mac_id = 1;

        ptxservq = &psta->sta_xmitpriv.be_q;
        return _SUCCESS;
}

struct sta_info *rtw_get_bcmc_stainfo23a(struct rtw_adapter *padapter)
{
        struct sta_info         *psta;
        struct sta_priv         *pstapriv = &padapter->stapriv;

        psta = rtw_get_stainfo23a(pstapriv, bc_addr);
        return psta;
}

bool rtw_access_ctrl23a(struct rtw_adapter *padapter, u8 *mac_addr)
{
        bool res = true;
#ifdef CONFIG_8723AU_AP_MODE
        struct list_head *plist, *phead;
        struct rtw_wlan_acl_node *paclnode;
        bool match = false;
        struct sta_priv *pstapriv = &padapter->stapriv;
        struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
        struct rtw_queue *pacl_node_q = &pacl_list->acl_node_q;

        spin_lock_bh(&pacl_node_q->lock);
        phead = get_list_head(pacl_node_q);

        list_for_each(plist, phead) {
                paclnode = container_of(plist, struct rtw_wlan_acl_node, list);

                if (ether_addr_equal(paclnode->addr, mac_addr)) {
                        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;
}