晴天-局域网通信软件设计报告(2)

remote.sin_family = AF_INET;

remote.sin_port = htons(MCASTPORT);

remote.sin_addr.s_addr = inet_addr( MCASTADDR );

if(SOCKET_ERROR==bind(bc_socket,(SOCKADDR*)&local,sizeof(local))) {

MessageBox("多播绑定失败！");

return false;

}

if(INVALID_SOCKET==(sockM=WSAJoinLeaf(bc_socket,(SOCKADDR*)&remote,sizeof(remote),NULL,NULL,NULL,NULL,JL_BOTH)))

{

MessageBox("绑定失败！");

return false;

}

if(SOCKET_ERROR==WSAAsyncSelect(bc_socket,m_hWnd,UM_SOCK,FD_READ))

{

MessageBox("注册网络读取事件失败！");

return false;

}

return true;

}

2.3 指定IP通信的实现

套接字建立---->绑定---->注册网络事件

BOOL CQtChatDlg::InitT()

{

m_socket=WSASocket(AF_INET,SOCK_DGRAM,0,NULL,0,0);

if(INVALID_SOCKET==m_socket)

{

MessageBox("创建套接字失败！");

return FALSE;

}

SOCKADDR_IN addrSock;

addrSock.sin_addr.S_un.S_addr=INADDR_ANY;

addrSock.sin_family=AF_INET;

addrSock.sin_port=htons(6000);

if(SOCKET_ERROR==bind(m_socket,(SOCKADDR*)&addrSock,sizeof(addrSock)))

{

MessageBox("绑定失败！");

return FALSE;