//ClientTunnel.cpp
#include "stdafx.h"
///////////////////////////////////////////////////////////////////////////////
#include "ClientTunnel.h"
#include "./include/struct_def.h"
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
/////////////////////////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);
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
#pragma comment(lib, "Transport.lib")
CClientTunnel::CClientTunnel()
{
	m_hSocket = INVALID_SOCKET;
}

CClientTunnel::~CClientTunnel()
{
}

int CClientTunnel::net_OpenSocket(IN ETransportType eType,
	IN 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;

	eventHandler = netHandleNetEvent;
	pContext = this;

	LPTRANSPORT_GETDATABUFLEN cbHandler = netGetDataBufLenCb;
	SOCKET hSocket = CTransportImpl::net_OpenSocket(eType, usPort,
		eventHandler,
		cbHandler,
		ulHeaderLen,
		pContext);

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

	m_hSocket = hSocket;

	return status;
}

void CClientTunnel::net_CloseSocket()
{
	CTransportImpl::net_CloseSocket();
}

int CClientTunnel::net_Connect(IN unsigned long ulIPValue, IN unsigned short usPort)
{
	int nResult = TRANSPORT_OK;

	nResult = CTransportImpl::net_Connect(ulIPValue, usPort);

	return nResult;
}

unsigned long CClientTunnel::net_Send(IN void *pHeader,
	IN void *pMessage,
	IN 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*/
	SOCKET hSocket = m_hSocket;
	ulSendLen = CTransportImpl::net_Send(hSocket, (void *)pSendBuf, ulBufLen);

	/**/
	delete[] pSendBuf;
	pSendBuf = NULL;


	return ulSendLen;
}

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
////////////////////////////////callback functions/////////////////////////////
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;

	return;
}

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);
		}
	}
}