windows编程环境中设置UDP超时

LitteGreen 2010-08-31 11:02:59

接收UDP数据时，如果没有接收数据，recvfrom函数会一直等待中，造成线程假死，在网上找了很多设置超时的资料，都不是我想要的，所以在这里求助大家了，分不多了，请大家多帮帮忙，嘿嘿，我把我的代码贴出，看一下如何设置



class UDPNet

{

private:

	WORD wVersionRequested;

	WSADATA wsaData;

	int err;

	SOCKADDR_IN addrSrv;

	SOCKADDR_IN addrClient;

	SOCKET sockSrv;

	int len,RecvLen;

public:

	void Open(int SendPort,int RecvPort);

	void Send(TCHAR Buffer[200],int SendLen);

	int  Recv(TCHAR Recv[200]);

	void Close();

};

void UDPNet::Open(int SendPort,int RecvPort)

{

	wVersionRequested = MAKEWORD( 1, 1 );

	

	err = WSAStartup( wVersionRequested, &wsaData );

	if ( err != 0 ) {

		MessageBox(NULL,"网络协议加载失败","",0); 

	}

	

	if ( LOBYTE( wsaData.wVersion ) != 1 ||

		HIBYTE( wsaData.wVersion ) != 1 ) {

		WSACleanup( );

		MessageBox(NULL,"网络协议加载失败","",0); 

	}

	

	sockSrv=socket(AF_INET,SOCK_DGRAM,0);//使用套接字

	len=sizeof(SOCKADDR);

	sockSrv=socket(AF_INET,SOCK_DGRAM,0);

	

	addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);

	addrSrv.sin_family=AF_INET;

	addrSrv.sin_port=htons(RecvPort);

	

	addrClient.sin_addr.S_un.S_addr=inet_addr("192.168.1.105");

	addrClient.sin_family=AF_INET;

	addrClient.sin_port=htons(SendPort);

	

	bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));

	

};



void UDPNet::Send(TCHAR Buffer[],int SendLen)

{

	sendto(sockSrv,Buffer,SendLen,0,(SOCKADDR*)&addrClient,

		sizeof(SOCKADDR));

};

int UDPNet::Recv(TCHAR Recv[])

{

	RecvLen=recvfrom(sockSrv,Recv,256,0,(SOCKADDR*)&addrSrv,&len);

	return RecvLen;

};



void UDPNet::Close()

{

	closesocket(sockSrv);

	WSACleanup();

};