udp的广播_setsockopt广播_udp组播(2)

m_Socket=socket(AF_INET,SOCK_DGRAM,0);

// if(SOCKET_ERROR==bind(m_Socket,(structsockaddr*)&m_ServerAddr,sizeof(m_ServerAddr)))

// {

// returnfalse;

// }

returntrue;

}

boolCUDPClient::Receive(char*szReceive,DWORDdwReceiveSize)

{

//非阻塞消息select使用

fd_setfdread;

//初始化fd_set

FD_ZERO(&fdread);

//分配套接字句柄到相应的fd_set

FD_SET(m_Socket,&fdread);

select(0,&fdread,NULL,NULL,&m_tv);

if(FD_ISSET(m_Socket,&fdread))

{

intlen=sizeof(m_ServerAddr);

if(SOCKET_ERROR==recvfrom(m_Socket,szReceive,dwReceiveSize,0,

(structsockaddr*)&m_ServerAddr,&len))

{

returnfalse;

}

unsignedshort*pUnBuff=(unsignedshort*)szReceive;

cout<<"CUDPClient::Receive:"<<inet_ntoa(m_ServerAddr.sin_addr)<<"-"<<pUnBuff[0]<<"-"<<pUnBuff[1]<<endl;

}

returntrue;

}

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