tcpsrv.cpp

Tcp协议的服务器端的应用程序

#include <Winsock2.h>
#include <stdio.h>

void main()
{
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	
	wVersionRequested=MAKEWORD(1,1);

	err=WSAStartup(wVersionRequested, &wsaData);
	if (err!=0) {
		/*Tell the user that we coule not find a usable */
		/*WinSock DLL.                                  */
		return;
	}
	
	if (LOBYTE(wsaData.wVersion ) !=1 || 
		HIBYTE(wsaData.wVersion ) !=1) {
		/*Tell the user that we coule not find a usable */
		/*WinSock DLL.                                  */
		WSACleanup();
		
		return;
	}
	SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);

	SOCKADDR_IN addrSrv;
	addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
	addrSrv.sin_family=AF_INET;
	addrSrv.sin_port=htons(6000);

	bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
	
	listen(sockSrv, 5);

	SOCKADDR_IN addrClient;
	int len=sizeof(SOCKADDR);
	while(1)
	{
		SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient, &len);
		char sendBuf[100];
		sprintf(sendBuf, "Welcom %s to http://www.sunxin.org",
			inet_ntoa(addrClient.sin_addr));
		send(sockConn, sendBuf, strlen(sendBuf)+1,0);
		char recvBuf[100];
		recv(sockConn, recvBuf, 100, 0);
		printf("%s\n", recvBuf);
		closesocket(sockConn);

	}
}