rtl8188eu/core/rtw_sta_mgt.c

/******************************************************************************
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 *
 ******************************************************************************/
#define _RTW_STA_MGT_C_

#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>
#include <recv_osdep.h>
#include <xmit_osdep.h>
#include <mlme_osdep.h>

#include <sta_info.h>

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

	spin_lock_init(&psta->lock);
	_rtw_init_listhead(&psta->list);
	_rtw_init_listhead(&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_AP_MODE

	_rtw_init_listhead(&psta->asoc_list);

	_rtw_init_listhead(&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_AP_MODE */

#ifdef DBG_TRX_STA_PKTS
	psta->tx_be_cnt = 0;
	psta->tx_bk_cnt = 0;
	psta->tx_vi_cnt = 0;
	psta->tx_vo_cnt = 0;

	psta->rx_be_cnt = 0;
	psta->rx_bk_cnt = 0;
	psta->rx_vi_cnt = 0;
	psta->rx_vo_cnt = 0;
#endif
;

}

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

;

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

	if (!pstapriv->pallocated_stainfo_buf)
		return _FAIL;

	pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 -
		((SIZE_PTR)(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);

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

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

		psta++;
	}

#ifdef CONFIG_AP_MODE

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

	_rtw_init_listhead(&pstapriv->asoc_list);
	_rtw_init_listhead(&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));
}

/*  this function is used to free the memory of lock || sema for all stainfos */
static void rtw_mfree_all_stainfo(struct sta_priv *pstapriv )
{
	unsigned long	 irqL;
	struct list_head *plist, *phead;
	struct sta_info *psta = NULL;

;

	spin_lock_bh(&pstapriv->sta_hash_lock);

	phead = get_list_head(&pstapriv->free_sta_queue);
	plist = get_next(phead);

	while ((rtw_end_of_queue_search(phead, plist)) == false)
	{
		psta = LIST_CONTAINOR(plist, struct sta_info , list);
		plist = get_next(plist);
	}

	spin_unlock_bh(&pstapriv->sta_hash_lock);

;

}

void rtw_mfree_sta_priv_lock(struct	sta_priv *pstapriv);
void rtw_mfree_sta_priv_lock(struct	sta_priv *pstapriv)
{
#ifdef CONFIG_AP_MODE
	struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
#endif

	 rtw_mfree_all_stainfo(pstapriv); /* be done before free sta_hash_lock */
}

u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
{
	unsigned long	irqL;
	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 = get_next(phead);

			while ((rtw_end_of_queue_search(phead, plist)) == false)
			{
				int i;
				psta = LIST_CONTAINOR(plist, struct sta_info , hash_list);
				plist = get_next(plist);

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

		rtw_mfree_sta_priv_lock(pstapriv);

		if (pstapriv->pallocated_stainfo_buf) {
			rtw_vmfree(pstapriv->pallocated_stainfo_buf, sizeof(struct sta_info)*NUM_STA+4);
		}
	}

;
	return _SUCCESS;
}

struct	sta_info *rtw_alloc_stainfo(struct	sta_priv *pstapriv, u8 *hwaddr)
{
	unsigned long irqL, irqL2;
	uint tmp_aid;
	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(&(pstapriv->sta_hash_lock));

	if (_rtw_queue_empty(pfree_sta_queue) == true) {
		psta = NULL;
	} else {
		psta = LIST_CONTAINOR(get_next(&pfree_sta_queue->queue), struct sta_info, list);

		rtw_list_delete(&(psta->list));

		tmp_aid = psta->aid;

		_rtw_init_stainfo(psta);

		psta->padapter = pstapriv->padapter;

		memcpy(psta->hwaddr, hwaddr, ETH_ALEN);

		index = wifi_mac_hash(hwaddr);

		RT_TRACE(_module_rtl871x_sta_mgt_c_, _drv_info_, ("rtw_alloc_stainfo: index  = %x", index));

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

		rtw_list_insert_tail(&psta->hash_list, phash_list);

		pstapriv->asoc_sta_count ++ ;

/*  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 = %x %x %x %x %x %x \n",
		pstapriv->asoc_sta_count , hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]));

		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;
			#ifdef DBG_RX_SEQ
			DBG_88E("DBG_RX_SEQ %s:%d IndicateSeq: %d\n", __FUNCTION__, __LINE__,
				preorder_ctrl->indicate_seq);
			#endif
			preorder_ctrl->wend_b = 0xffff;
			/* preorder_ctrl->wsize_b = (NR_RECVBUFF-2); */
			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:
	spin_unlock_bh(&(pstapriv->sta_hash_lock));
	return psta;
}

/*  using pstapriv->sta_hash_lock to protect */
u32	rtw_free_stainfo(struct adapter *padapter , struct sta_info *psta)
{
	int i;
	unsigned long irqL0;
	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;
	struct hw_xmit *phwxmit;

;

	if (psta == NULL)
		goto exit;

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

	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;

	/* vo */
	/* spin_lock_bh(&(pxmitpriv->vo_pending.lock)0); */
	rtw_free_xmitframe_queue( pxmitpriv, &pstaxmitpriv->vo_q.sta_pending);
	rtw_list_delete(&(pstaxmitpriv->vo_q.tx_pending));
	phwxmit = pxmitpriv->hwxmits;
	phwxmit->accnt -= pstaxmitpriv->vo_q.qcnt;
	pstaxmitpriv->vo_q.qcnt = 0;
	/* spin_unlock_bh(&(pxmitpriv->vo_pending.lock)0); */

	/* vi */
	/* spin_lock_bh(&(pxmitpriv->vi_pending.lock)0); */
	rtw_free_xmitframe_queue( pxmitpriv, &pstaxmitpriv->vi_q.sta_pending);
	rtw_list_delete(&(pstaxmitpriv->vi_q.tx_pending));
	phwxmit = pxmitpriv->hwxmits+1;
	phwxmit->accnt -= pstaxmitpriv->vi_q.qcnt;
	pstaxmitpriv->vi_q.qcnt = 0;
	/* spin_unlock_bh(&(pxmitpriv->vi_pending.lock)0); */

	/* be */
	/* spin_lock_bh(&(pxmitpriv->be_pending.lock)0); */
	rtw_free_xmitframe_queue( pxmitpriv, &pstaxmitpriv->be_q.sta_pending);
	rtw_list_delete(&(pstaxmitpriv->be_q.tx_pending));
	phwxmit = pxmitpriv->hwxmits+2;
	phwxmit->accnt -= pstaxmitpriv->be_q.qcnt;
	pstaxmitpriv->be_q.qcnt = 0;
	/* spin_unlock_bh(&(pxmitpriv->be_pending.lock)0); */

	/* bk */
	/* spin_lock_bh(&(pxmitpriv->bk_pending.lock)0); */
	rtw_free_xmitframe_queue( pxmitpriv, &pstaxmitpriv->bk_q.sta_pending);
	rtw_list_delete(&(pstaxmitpriv->bk_q.tx_pending));
	phwxmit = pxmitpriv->hwxmits+3;
	phwxmit->accnt -= pstaxmitpriv->bk_q.qcnt;
	pstaxmitpriv->bk_q.qcnt = 0;
	/* spin_unlock_bh(&(pxmitpriv->bk_pending.lock)0); */

	spin_unlock_bh(&pxmitpriv->lock);

	rtw_list_delete(&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 --;
	_cancel_timer_ex(&psta->addba_retry_timer);

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

		preorder_ctrl = &psta->recvreorder_ctrl[i];

		_cancel_timer_ex(&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 = get_next(phead);

		while (!rtw_is_list_empty(phead))
		{
			prframe = LIST_CONTAINOR(plist, union recv_frame, u);

			plist = get_next(plist);

			rtw_list_delete(&(prframe->u.hdr.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_AP_MODE

	spin_lock_bh(&pstapriv->auth_list_lock);
	if (!rtw_is_list_empty(&psta->auth_list)) {
		rtw_list_delete(&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);

	/* rtw_indicate_sta_disassoc_event(padapter, psta); */

	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_AP_MODE */

	rtw_list_insert_tail(&psta->list, get_list_head(pfree_sta_queue));
exit:
	return _SUCCESS;
}

/*  free all stainfo which in sta_hash[all] */
void rtw_free_all_stainfo(struct adapter *padapter)
{
	unsigned long	 irqL;
	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)
		goto exit;

	spin_lock_bh(&pstapriv->sta_hash_lock);

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

		while ((rtw_end_of_queue_search(phead, plist)) == false)
		{
			psta = LIST_CONTAINOR(plist, struct sta_info , hash_list);

			plist = get_next(plist);

			if (pbcmc_stainfo!=psta)
				rtw_free_stainfo(padapter , psta);

		}
	}

	spin_unlock_bh(&pstapriv->sta_hash_lock);

exit:

;

}

/* any station allocated can be searched by hash list */
struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
{

	unsigned long	 irqL;

	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 == NULL)
		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 = get_next(phead);

	while ((rtw_end_of_queue_search(phead, plist)) == false)
	{

		psta = LIST_CONTAINOR(plist, struct sta_info, hash_list);

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

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

}

u32 rtw_init_bcmc_stainfo(struct adapter* padapter)
{

	struct sta_info		*psta;
	struct tx_servq	*ptxservq;
	u32 res =_SUCCESS;
	u8 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 == NULL) {
		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;

	ptxservq = &(psta->sta_xmitpriv.be_q);

exit:
	return _SUCCESS;
}

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_AP_MODE
	unsigned long irqL;
	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 = get_next(phead);
	while ((rtw_end_of_queue_search(phead, plist)) == false)
	{
		paclnode = LIST_CONTAINOR(plist, struct rtw_wlan_acl_node, list);
		plist = get_next(plist);

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

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

#endif

	return res;

}