Question

MFC CSOCKET实现通信的小程序 请将您的如上代码转发给我好吗？谢谢。我的多线程CSocket老崩溃。谢谢。

Answer 1

BOOL CChatApp::InitInstance()////
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 2, 2 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 ) {
return FALSE;}
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 2 ) {

WSACleanup( );
return FALSE;
}
...........................................................
}
BOOL CChatDlg::InitSocket()
{
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=htonl(INADDR_ANY);
addrSock.sin_family=AF_INET;
addrSock.sin_port=htons(6000);
if(SOCKET_ERROR==bind(m_socket,(SOCKADDR*)&addrSock,sizeof(SOCKADDR)))
{
MessageBox("绑定失败！");
return FALSE;
}
if(SOCKET_ERROR==WSAAsyncSelect(m_socket,m_hWnd,UM_SOCK,FD_READ))
{
MessageBox("注册网络读取事件失败！");
return FALSE;
}

return TRUE;
}

void CChatDlg::OnSock(WPARAM wParam,LPARAM lParam)
{
switch(LOWORD(lParam))
{
case FD_READ:
WSABUF wsabuf;
wsabuf.buf=new char[200];
wsabuf.len=200;
DWORD dwRead;
DWORD dwFlag=0;
SOCKADDR_IN addrFrom;
int len=sizeof(SOCKADDR);
CString str;
CString strTemp;

if(SOCKET_ERROR==WSARecvFrom (m_socket,&wsabuf,1,&dwRead,&dwFlag,(SOCKADDR*)&addrFrom,&len,NULL,NULL))
{
MessageBox("接收数据失败！");
delete[] wsabuf.buf;
return;
}
HOSTENT *pHost;
pHost=gethostbyaddr((char*&addrFrom.sin_addr.S_un.S_addr,4,AF_INET);
str.Format("%s说 :%s",pHost->h_name,wsabuf.buf);
str+="\r\n";
GetDlgItemText(IDC_EDIT_RECV,strTemp);
str+=strTemp;
SetDlgItemText(IDC_EDIT_RECV,str);
delete[] wsabuf.buf;
break;
}
}
void CChatDlg::OnBtnSend()
{
// TODO: Add your control notification handler code here
DWORD dwIP;
CString strSend;
WSABUF wsabuf;
DWORD dwSend;
int len;
SOCKADDR_IN addrTo;
CString strHostName;
HOSTENT* pHost;

if(GetDlgItemText(IDC_EDIT_HOSTNAME,strHostName),strHostName=="")
{
((CIPAddressCtrl*)GetDlgItem(IDC_IPADDRESS1))->GetAddress(dwIP);
addrTo.sin_addr.S_un.S_addr=htonl(dwIP);
}
else
{
pHost=gethostbyname(strHostName);
addrTo.sin_addr.S_un.S_addr=*((DWORD*)pHost->h_addr_list[0]);
}

addrTo.sin_family=AF_INET;
addrTo.sin_port=htons(6000);

GetDlgItemText(IDC_EDIT_SEND,strSend);
len=strSend.GetLength();
wsabuf.buf=strSend.GetBuffer(len);
wsabuf.len=len+1;

if(SOCKET_ERROR==WSASendTo(m_socket,&wsabuf,1,&dwSend,0,
(SOCKADDR*)&addrTo,sizeof(SOCKADDR),NULL,NULL))
{
MessageBox("发送数据失败！");
return;
}

SetDlgItemText(IDC_EDIT_SEND,"");
}
如果哪里还有问题，你可以参考一下《深入解析VC++》，希望能对你有所帮助