单线程收包

WORD wVersionRequested;

WSADATA wsaData;

int err;

wVersionRequested = MAKEWORD( 2, 2 );

err = WSAStartup( wVersionRequested, &wsaData );

if ( err != 0 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL.                                  */

return;

}

if ( LOBYTE( wsaData.wVersion ) != 2 ||

HIBYTE( wsaData.wVersion ) != 2 ) {

/* Tell the user that we could not find a usable */

/* WinSock DLL.                                  */

WSACleanup( );

return; 

}

/*服务端程序流程如下

1）创建套接字（socket)；

2）将套接字绑定到一个本地地址和端口上(bind)；

3）将套接字设为监听模式，准备接受客户请求(listen);

4)  等待客户端请求到来；当请求到来后，接受请求，返回一个新的对应于此连接的套接字(accept)；

5）用返回的套接字和客户端进行通信（send/recv）；

6)  返回，等待另一个客户请求；

7）关闭套接字；*/

SOCKET sServer = socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN sServerAddress = {0} ;

sServerAddress.sin_addr.S_un.S_addr = INADDR_ANY;

sServerAddress.sin_family = AF_INET;

sServerAddress.sin_port = 12345;

bind(sServer,(sockaddr*)&sServerAddress,sizeof(sServerAddress));

listen(sServer,10);

int nLen = sizeof(sServerAddress);

SOCKET sServerAccept = accept(sServer,(sockaddr*)&sServerAddress,&nLen);

/*TCHAR szRecvBuf[MAXBYTE] = {0};

CString str = (WCHAR *)szRecvBuf ;*/

BYTE byBuf[1024] = {0} ;

int nRecvLen = 0;

nRecvLen =recv(sServerAccept,

(char*)byBuf,

sizeof(byBuf),

0);

CString tmp;

if(nRecvLen > 0)

{

UpdateData();

tmp.Format(_T("%s \r\n"), byBuf);

::MessageBox(NULL,tmp,

TEXT("这是客户端传来的消息"),MB_ICONINFORMATION);

//m_szRecv+=tmp;

UpdateData(FALSE);

}

else

{

MessageBox(_T("收到的数据有问题!"));

}