CP Socket编程 C/C++实现 （Windows Platform SDK）

keyit.focus();} C语言TCP程序中的Hello World。以前一直用OO语言，现在用C语言写着玩，思想上有点转不过来弯，o(∩_∩)o... Server：

#pragma comment(lib, "ws2_32.lib")



#include <Winsock2.h>



#include <stdio.h>







void main()



{



	//版本协商



	WORD wVersionRequested;



	WSADATA wsaData;



	int err;



	



	wVersionRequested = MAKEWORD(1,1); //0x0101



	err = WSAStartup(wVersionRequested,&wsaData);



	if(err!=0)



	{



		return;



	}



	



	if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1) 



		//wsaData.wVersion!=0x0101



	{



		WSACleanup();



		return;



	}



	//创建Socket



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



	//创建IP地址和端口



	SOCKADDR_IN addrSvr;



	addrSvr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);



	addrSvr.sin_family = AF_INET;



	addrSvr.sin_port = htons(6000);



	//绑定端口监听



	bind(sockSvr,(SOCKADDR*)&addrSvr,sizeof(SOCKADDR));



	listen(sockSvr,5);



	



	sockaddr_in addrClient;



	int len = sizeof(sockaddr);



	while(true)



	{



		//阻塞方法，获得一个客户Socket连接



		SOCKET sockConn = accept(sockSvr,(sockaddr*)&addrClient,&len);



		char sendbuffer[128];



		sprintf(sendbuffer,"Welcom %s!",inet_ntoa(addrClient.sin_addr));



		//向客户Socket发送数据



		send(sockConn,sendbuffer,strlen(sendbuffer)+1,0);



		char recvbuffer[128];



		//从客户Soc接受数据



		recv(sockConn,recvbuffer,128,0);



		printf("%s\n",recvbuffer);



		//关闭Socket



		closesocket(sockConn);



	}



	closesocket(sockSvr);



	//释放Winsock资源



	WSACleanup();



}

Client：

#pragma comment (lib,"ws2_32.lib")



#include <Winsock2.h>



#include <stdio.h>







void main()



{



	//版本协商



	WORD wVersionRequested;



	WSADATA wsaData;



	int err;



	



	wVersionRequested = MAKEWORD(1,1); //0x0101



	err = WSAStartup(wVersionRequested,&wsaData);



	if(err!=0)



	{



		return;



	}



	



	if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1) 



		//wsaData.wVersion!=0x0101



	{



		WSACleanup();



		return;



	}



	//创建连向服务器的套接字



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



	//创建地址信息



	SOCKADDR_IN hostAddr;



	hostAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");



	hostAddr.sin_family = AF_INET;



	hostAddr.sin_port = htons(6000);



	//连接服务器



	connect(sock,(sockaddr*)&hostAddr,sizeof(sockaddr));



	



	char revBuf[128];



	//从服务器获得数据



	recv(sock,revBuf,128,0);



	printf("%s\n",revBuf);



	//向服务器发送数据



	send(sock,"Hello Host!",12,0);



	closesocket(sock);



}