#include "stdafx.h"
#include "ClientTunnel.h"
#include "..\NetWork\data_def.h"
#include "..\NetWork\NetWorkInterface.h"
#include "..\NetWork\NetWorkBase.h"
#ifdef _DEBUG
#pragma comment(lib,"..\\lib\\lyfzNetWork_d.lib")
#else
#pragma comment(lib,"..\\lib\\lyfzNetWork.lib")
#endif //#ifdef _DEBUG

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


CNetWorkBase* g_pNetWork = NULL;

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
/////////////////////////Callback functions////////////////////////////////////
/*Get the header length according to header struct*/
static void netGetDataBufLenCb(IN SOCKET hSocket, IN void *pHeaderBuf, 
							   OUT unsigned long *nDataLen);

/*net event*/
static void netHandleNetEvent(IN SOCKET hSocket, IN ETransportEvent eEvent, 
							  IN void *pDataBuf, IN unsigned long nDataLen, 
							  IN int nError, IN void *pContext);

CClientTunnel::CClientTunnel()
{
	g_pNetWork = new CNetWorkBase;
}

CClientTunnel::~CClientTunnel()
{
	if(g_pNetWork)
		delete g_pNetWork;
	g_pNetWork = NULL;
}

TransportStatus CClientTunnel::Transport_Init()
{
	return CNetWorkBase::Transport_Init();
}

TransportStatus CClientTunnel::Transport_UnInit()
{
	return CNetWorkBase::Transport_UnInit();
}

int CClientTunnel::net_OpenSocket(IN CONST ETransportType eType, IN CONST unsigned short usPort, IN LPTRANSPORT_EVENT eventHandler, void *pContext)
{
	TransportStatus status = TRANSPORT_OK;
	
	unsigned long ulHeaderLen = MESSAGE_HEADER_LEN;

	/*Use this layer handle event and context, 
	save the application layer handle event and context*/
	m_eventHandler = eventHandler;
	m_pContext = pContext;
	
	LPTRANSPORT_GETDATABUFLEN cbHandler = netGetDataBufLenCb;

	SOCKET hSocket = g_pNetWork->net_OpenSocket(
		eType, 
		usPort, 
		netHandleNetEvent, 
		cbHandler, 
		ulHeaderLen, 
		this);

	if( INVALID_SOCKET == hSocket )
	{
		return TRANSPORT_ERROR;
	}

	return status;
}

void CClientTunnel::net_CloseSocket()
{
	g_pNetWork->net_CloseSocket();
}


/************************************************************************/
/*
函数: net_Connect
描述: 连接服务
参数:
	IN unsigned long ulIPValue,			ip地址
	IN unsigned short usPort			端口
返回:-1失败
*/
/************************************************************************/
int CClientTunnel::net_Connect(IN CONST unsigned long ulIPValue, IN CONST unsigned short usPort)
{
	m_nIndex = g_pNetWork->net_Connect(ulIPValue, usPort);
	return m_nIndex;
}

unsigned long CClientTunnel::net_Send(IN void *pHeader, IN void *pMessage, IN CONST unsigned long ulDataLen)
{
	unsigned long ulSendLen = 0;
	unsigned long ulBufLen = 0;

	TMessageHeader *pSendHeader = (TMessageHeader *)pHeader;

	ulBufLen = MESSAGE_HEADER_LEN + ulDataLen;	

	char *pSendBuf = new char[ulBufLen];
	memset(pSendBuf, 0, ulBufLen);

	TMessageHeader *pMessageHeader = (TMessageHeader *)pSendBuf;
	pMessageHeader->byVersion = 101;
	pMessageHeader->wHeaderFlag = MESSAGE_HEADER_FLAG;
	pMessageHeader->wMessageId = pSendHeader->wMessageId;
	pMessageHeader->wMessageSubId = pSendHeader->wMessageSubId;
	pMessageHeader->dwDataLen = ulDataLen;
	pMessageHeader->wReserve = 0;

	memcpy((void *)(pSendBuf+MESSAGE_HEADER_LEN), pMessage, ulDataLen);

	/* convert network word */
	htons(pMessageHeader->wHeaderFlag);
	htons(pMessageHeader->wMessageId);
	htons(pMessageHeader->wMessageSubId);
	htonl(pMessageHeader->dwDataLen);
	htons(pMessageHeader->wCheckSum);	
	htonl(pMessageHeader->wReserve);

	/*Send the message*/
   	ulSendLen = g_pNetWork->net_Send(m_nIndex, (void *)pSendBuf, ulBufLen);

	/**/
	delete [] pSendBuf;
	pSendBuf = NULL;
	return ulSendLen;
}

/************************************************************************/
/*
函数:ResetBuffer
描述:获取数据缓冲;
参数:
	IN SOCKET hSocket, 
	IN void *pHeaderBuf,				消息头
	OUT unsigned long *nDataLen			返回长度
返回:
*/
/************************************************************************/
void netGetDataBufLenCb(IN SOCKET hSocket, IN void *pHeaderBuf, OUT unsigned long *nDataLen)
{
	TMessageHeader *pHeader = NULL;

	*nDataLen = 0;

	pHeader = (TMessageHeader *)pHeaderBuf;
	if( NULL == pHeader )
		return;

	if( MESSAGE_HEADER_FLAG != pHeader->wHeaderFlag )
		return;

	unsigned long dwDataBufLen = pHeader->dwDataLen;
	ntohl(dwDataBufLen);
	*nDataLen = dwDataBufLen;
}

void netHandleNetEvent(IN SOCKET hSocket, IN ETransportEvent eEvent, 
					   IN void *pDataBuf, IN unsigned long nDataLen, 
					   IN int nError, IN void *pContext)
{
	/*Notify application layer*/
	CClientTunnel *pClientTunnel = (CClientTunnel *)pContext;
	if( NULL == pClientTunnel )
		return;

	void *pUserData = pClientTunnel->m_pContext;

	TransportBool bHandle = TRUE;

	if( Transport_ReadEv == eEvent )
	{
		if( nDataLen <= 0 )
			return;

		/*提取消息头，获得消息ID*/
		char *pMessageBuf = (char *)pDataBuf;		
		TMessageHeader *pHeader = (TMessageHeader *)pMessageBuf;		

		/*网络字节顺序的转换*/
		ntohs(pHeader->wHeaderFlag);
		ntohs(pHeader->wMessageId);
		ntohs(pHeader->wMessageSubId);
		ntohl(pHeader->dwDataLen);
		ntohs(pHeader->wCheckSum);
		ntohl(pHeader->wReserve);
		bHandle = (MESSAGE_HEADER_FLAG == pHeader->wHeaderFlag);
	}

	if( bHandle )
	{
		if( NULL != pClientTunnel->m_eventHandler )
			pClientTunnel->m_eventHandler(hSocket, eEvent, pDataBuf, nDataLen, nError, pUserData);
	}
}