rtl8188eu/os_dep/recv_linux.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 _RECV_OSDEP_C_

#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>

#include <wifi.h>
#include <recv_osdep.h>

#include <osdep_intf.h>
#include <ethernet.h>
#include <usb_ops.h>

//init os related resource in struct recv_priv
int rtw_os_recv_resource_init(struct recv_priv *precvpriv, _adapter *padapter)
{
	int	res=_SUCCESS;

	return res;
}

//alloc os related resource in union recv_frame
int rtw_os_recv_resource_alloc(_adapter *padapter, union recv_frame *precvframe)
{
	int	res=_SUCCESS;

	precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;

	return res;

}

//free os related resource in union recv_frame
void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
{

}


//alloc os related resource in struct recv_buf
int rtw_os_recvbuf_resource_alloc(_adapter *padapter, struct recv_buf *precvbuf)
{
	int res=_SUCCESS;
	struct dvobj_priv	*pdvobjpriv = adapter_to_dvobj(padapter);
	struct usb_device	*pusbd = pdvobjpriv->pusbdev;

	precvbuf->irp_pending = false;
	precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
	if (precvbuf->purb == NULL){
		res = _FAIL;
	}

	precvbuf->pskb = NULL;

	precvbuf->reuse = false;

	precvbuf->pallocated_buf  = precvbuf->pbuf = NULL;

	precvbuf->pdata = precvbuf->phead = precvbuf->ptail = precvbuf->pend = NULL;

	precvbuf->transfer_len = 0;

	precvbuf->len = 0;

	return res;
}

//free os related resource in struct recv_buf
int rtw_os_recvbuf_resource_free(_adapter *padapter, struct recv_buf *precvbuf)
{
	if (precvbuf->purb)
		usb_free_urb(precvbuf->purb);

	if (precvbuf->pskb)
		dev_kfree_skb_any(precvbuf->pskb);

	return _SUCCESS;
}

void rtw_handle_tkip_mic_err(_adapter *padapter,u8 bgroup)
{
#ifdef CONFIG_IOCTL_CFG80211
	enum nl80211_key_type key_type;
#endif
	union iwreq_data wrqu;
	struct iw_michaelmicfailure    ev;
	struct mlme_priv*              pmlmepriv  = &padapter->mlmepriv;
	struct security_priv	*psecuritypriv = &padapter->securitypriv;
	u32 cur_time = 0;

	if ( psecuritypriv->last_mic_err_time == 0 )
	{
		psecuritypriv->last_mic_err_time = rtw_get_current_time();
	}
	else
	{
		cur_time = rtw_get_current_time();

		if ( cur_time - psecuritypriv->last_mic_err_time < 60*HZ )
		{
			psecuritypriv->btkip_countermeasure = true;
			psecuritypriv->last_mic_err_time = 0;
			psecuritypriv->btkip_countermeasure_time = cur_time;
		}
		else
		{
			psecuritypriv->last_mic_err_time = rtw_get_current_time();
		}
	}

#ifdef CONFIG_IOCTL_CFG80211
	if ( bgroup )
	{
		key_type |= NL80211_KEYTYPE_GROUP;
	}
	else
	{
		key_type |= NL80211_KEYTYPE_PAIRWISE;
	}

	cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[ 0 ], key_type, -1,
		NULL, GFP_ATOMIC);
#endif

	_rtw_memset( &ev, 0x00, sizeof( ev ) );
	if ( bgroup )
	{
	    ev.flags |= IW_MICFAILURE_GROUP;
	}
	else
	{
	    ev.flags |= IW_MICFAILURE_PAIRWISE;
	}

	ev.src_addr.sa_family = ARPHRD_ETHER;
	_rtw_memcpy( ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[ 0 ], ETH_ALEN );

	_rtw_memset( &wrqu, 0x00, sizeof( wrqu ) );
	wrqu.data.length = sizeof( ev );

#ifndef CONFIG_IOCTL_CFG80211
	wireless_send_event( padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu, (char*) &ev );
#endif
}

void rtw_hostapd_mlme_rx(_adapter *padapter, union recv_frame *precv_frame)
{
}

int rtw_recv_indicatepkt(_adapter *padapter, union recv_frame *precv_frame)
{
	struct recv_priv *precvpriv;
	_queue	*pfree_recv_queue;
	_pkt *skb;
	struct mlme_priv*pmlmepriv = &padapter->mlmepriv;

#ifdef CONFIG_BR_EXT
	void *br_port = NULL;
#endif

_func_enter_;

	precvpriv = &(padapter->recvpriv);
	pfree_recv_queue = &(precvpriv->free_recv_queue);

#ifdef CONFIG_DRVEXT_MODULE
	if (drvext_rx_handler(padapter, precv_frame->u.hdr.rx_data, precv_frame->u.hdr.len) == _SUCCESS)
	{
		goto _recv_indicatepkt_drop;
	}
#endif

	skb = precv_frame->u.hdr.pkt;
	if (skb == NULL) {
		RT_TRACE(_module_recv_osdep_c_,_drv_err_,("rtw_recv_indicatepkt():skb==NULL something wrong!!!!\n"));
		goto _recv_indicatepkt_drop;
	}

	RT_TRACE(_module_recv_osdep_c_,_drv_info_,("rtw_recv_indicatepkt():skb != NULL !!!\n"));
	RT_TRACE(_module_recv_osdep_c_,_drv_info_,("rtw_recv_indicatepkt():precv_frame->u.hdr.rx_head=%p  precv_frame->hdr.rx_data=%p\n", precv_frame->u.hdr.rx_head, precv_frame->u.hdr.rx_data));
	RT_TRACE(_module_recv_osdep_c_,_drv_info_,("precv_frame->hdr.rx_tail=%p precv_frame->u.hdr.rx_end=%p precv_frame->hdr.len=%d\n", precv_frame->u.hdr.rx_tail, precv_frame->u.hdr.rx_end, precv_frame->u.hdr.len));

	skb->data = precv_frame->u.hdr.rx_data;

	skb_set_tail_pointer(skb, precv_frame->u.hdr.len);

	skb->len = precv_frame->u.hdr.len;

	RT_TRACE(_module_recv_osdep_c_,_drv_info_,
		 ("skb->head=%p skb->data=%p skb->tail=%p skb->end=%p skb->len=%d\n",
		 skb->head, skb->data, skb_tail_pointer(skb), skb_end_pointer(skb), skb->len));

	if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
		_pkt *pskb2=NULL;
		struct sta_info *psta = NULL;
		struct sta_priv *pstapriv = &padapter->stapriv;
		struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
		int bmcast = IS_MCAST(pattrib->dst);

		//DBG_88E("bmcast=%d\n", bmcast);

		if (_rtw_memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)==false) {
			if (bmcast) {
				psta = rtw_get_bcmc_stainfo(padapter);
				pskb2 = skb_clone(skb, GFP_ATOMIC);
			} else {
				psta = rtw_get_stainfo(pstapriv, pattrib->dst);
			}

			if (psta)
			{
				struct net_device *pnetdev= (struct net_device*)padapter->pnetdev;

				//DBG_88E("directly forwarding to the rtw_xmit_entry\n");

				//skb->ip_summed = CHECKSUM_NONE;
				skb->dev = pnetdev;
#if (LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35))
				skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));
#endif //LINUX_VERSION_CODE>=KERNEL_VERSION(2,6,35)

				rtw_xmit_entry(skb, pnetdev);

				if (bmcast)
					skb = pskb2;
				else
					goto _recv_indicatepkt_end;
			}


		}
		else// to APself
		{
			//DBG_88E("to APSelf\n");
		}
	}


#ifdef CONFIG_BR_EXT

#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35))
	br_port = padapter->pnetdev->br_port;
#else   // (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35))
	rcu_read_lock();
	br_port = rcu_dereference(padapter->pnetdev->rx_handler_data);
	rcu_read_unlock();
#endif  // (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35))

	if ( br_port	&& (check_fwstate(pmlmepriv, WIFI_STATION_STATE|WIFI_ADHOC_STATE) == true) )
	{
		if (nat25_handle_frame(padapter, skb) == -1) {
			//priv->ext_stats.rx_data_drops++;
			//DEBUG_ERR("RX DROP: nat25_handle_frame fail!\n");
			//return FAIL;
#if 1
			// bypass this frame to upper layer!!
#else
			goto _recv_indicatepkt_drop;
#endif
		}
	}

#endif	// CONFIG_BR_EXT


	skb->ip_summed = CHECKSUM_NONE;
	skb->dev = padapter->pnetdev;
	skb->protocol = eth_type_trans(skb, padapter->pnetdev);

	netif_rx(skb);

_recv_indicatepkt_end:

	precv_frame->u.hdr.pkt = NULL; // pointers to NULL before rtw_free_recvframe()

	rtw_free_recvframe(precv_frame, pfree_recv_queue);

	RT_TRACE(_module_recv_osdep_c_,_drv_info_,("\n rtw_recv_indicatepkt :after netif_rx!!!!\n"));

_func_exit_;

        return _SUCCESS;

_recv_indicatepkt_drop:

	 //enqueue back to free_recv_queue
	 if (precv_frame)
		 rtw_free_recvframe(precv_frame, pfree_recv_queue);

	 return _FAIL;

_func_exit_;

}

void rtw_os_read_port(_adapter *padapter, struct recv_buf *precvbuf)
{
	struct recv_priv *precvpriv = &padapter->recvpriv;

	precvbuf->ref_cnt--;

	//free skb in recv_buf
	dev_kfree_skb_any(precvbuf->pskb);

	precvbuf->pskb = NULL;
	precvbuf->reuse = false;

	if (precvbuf->irp_pending == false)
	{
		rtw_read_port(padapter, precvpriv->ff_hwaddr, 0, (unsigned char *)precvbuf);
	}
}

void _rtw_reordering_ctrl_timeout_handler(void *FunctionContext)
{
	struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)FunctionContext;
	rtw_reordering_ctrl_timeout_handler(preorder_ctrl);
}

void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
{
	_adapter *padapter = preorder_ctrl->padapter;

	_init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev, _rtw_reordering_ctrl_timeout_handler, preorder_ctrl);

}