为什么收不到有些客户端发来的数据啊？

chenjunge 2011-05-19 04:17:15

为什么收不到有些客户端发来的数据啊？部分代码如下：

WSADATA wsaData;

	nRet = WSAStartup(MAKEWORD(2,2), &wsaData);

	if(nRet != NO_ERROR)

	{

		err = WSAGetLastError();

		return -1;

	}

	

	//创建监听socket

	SOCKET  ListenSocket;

    ListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);

    if(ListenSocket == INVALID_SOCKET)

    {

        err = WSAGetLastError();

		WSACleanup();

        return -1;

    }

	

	int port = 8001;

	int iAddrSize;

	//添地址

	sockaddr_in local;

	local.sin_family = AF_INET;

	local.sin_addr.s_addr = htonl(INADDR_ANY);//inet_addr("127.0.0.1");

    local.sin_port = htons(port);

	

	iAddrSize = sizeof(local);

	//绑定

	if(bind(ListenSocket, (SOCKADDR*)&local, iAddrSize) == SOCKET_ERROR)

    {

		err = WSAGetLastError();

		closesocket(ListenSocket);

		WSACleanup();

        return -1;

    }

	

	//开始侦听

    if(listen(ListenSocket, SOMAXCONN) != 0)

	{

		err = WSAGetLastError();

		closesocket(ListenSocket);

		WSACleanup();

        return -1;

    }

	

	while (1) 

	{

		// 创建一个接受连接请求的端口

		

		SOCKET* pClient = new SOCKET;

		*pClient = accept(ListenSocket, (SOCKADDR*)&local,&iAddrSize);

		if(*pClient == INVALID_SOCKET)

		{

			err = WSAGetLastError();

			closesocket(ListenSocket);

			WSACleanup();

			return -1;

		}

		

		DWORD dwCheckOnlineStatusThreadID1;

		//ClientSocket = AcceptSocket;

		

		SClientSocketInfo  *pClientSocketInfo=new SClientSocketInfo;

		

		pClientSocketInfo->ClientSocket= *pClient;

		pClientSocketInfo->csIp = csStationIp;

		pClientSocketInfo->csPort = csStationPort;

		

		m_DbAdmin->m_ListClientSocketInfo.AddHead(pClientSocketInfo);

		

		m_hCheckOnlineStatusThread1 = CreateThread(NULL,0,CallBackCheckOnlineStatus1,this,0,&dwCheckOnlineStatusThreadID1); 

		if(m_hCheckOnlineStatusThread1 == NULL)

		{

			//AfxMessageBox("创建在线检测线程失败!"); 

			closesocket(ListenSocket);

			WSACleanup();

			return -1; 

		}

	}

	closesocket(ListenSocket);

	WSACleanup();







DWORD WINAPI CallBackCheckOnlineStatus1(LPVOID lpParameter )  // thread data

{

	CDoc *pDoc = (CDoc*)lpParameter; 

	

	int iResult, iSendResult; 

	unsigned char buf[21];

	int len = 21;

	memset(buf,0,len);

	

	

	POSITION pos = pDoc->m_DbAdmin->m_ListClientSocketInfo.GetHeadPosition();

	while(pos != NULL)

	{

		SClientSocketInfo  *pClientSocketInfo = (SClientSocketInfo*)pDoc->m_DbAdmin->m_ListClientSocketInfo.GetNext(pos);

		

		sockaddr_in ClientLocal;

		int iClientAddrSize = sizeof(ClientLocal);

		iResult = getpeername(pClientSocketInfo->ClientSocket , (SOCKADDR*)&ClientLocal,&iClientAddrSize);

		//sprintf((char *)buf, "客户端的IP地址：%s,端口号:%d ", inet_ntoa(ClientLocal.sin_addr),ntohs(ClientLocal.sin_port)); 

		if (0 == iResult)

		{

			iResult = recv(pClientSocketInfo->ClientSocket,(char *)buf, len, 0); 

			if (iResult > 0) 

			{            

				}

	closesocket(pClientSocketInfo->ClientSocket);           

	WSACleanup();  

	

	//delete pClientSocketInfo;

	}

	

	

	return FALSE;

}