c++的TCP测试

服务端

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

void main(){
	//加载嵌套字库
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	
	wVersionRequested=MAKEWORD(1,1);
	err=WSAStartup(wVersionRequested,&wsaData);

	if(err!=0){
		return;
	}

	if(LOBYTE(wsaData.wVersion)!=1||HIBYTE(wsaData.wVersion)!=1){
		WSACleanup();
		return;
	}
	
	//创建用于监听的嵌套字
	SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);

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

	//绑定嵌套字
	bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
	//将嵌套字设为监听模式
	listen(sockSrv,5);

	SOCKADDR_IN addrClient;
	int len=sizeof(SOCKADDR);

	while(1){
	
		SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
		char sendBuf[100];
		sprintf_s(sendBuf,"Welcome %s to MFC",inet_ntoa(addrClient.sin_addr));

		//发送数据
		send(sockConn,sendBuf,strlen(sendBuf)+1,0);
		char revBuf[100];

		//接受数据
		recv(sockConn,revBuf,100,0);

		//打印数据
		printf("%s\n",revBuf);

		//关闭嵌套字
		closesocket(sockConn);
	}

}

客户端

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

void main(){
	//加载嵌套字库
	WORD wVersionRequested;
	WSADATA wsaData;
	int err;
	
	wVersionRequested=MAKEWORD(1,1);
	err=WSAStartup(wVersionRequested,&wsaData);

	if(err!=0){
		return;
	}

	if(LOBYTE(wsaData.wVersion)!=1||HIBYTE(wsaData.wVersion)!=1){
		WSACleanup();
		return;
	}
	
	//创建用于监听的嵌套字
	SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);

	SOCKADDR_IN addrSrv;
	addrSrv.sin_family=AF_INET;
	addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
	addrSrv.sin_port=htons(6000);

	//向服务器发送请求
	connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));
	//接收数据
	char recvBuf[100];
	recv(sockClient,recvBuf,100,0);
	printf("%s\n",recvBuf);
	send(sockClient,"This is lisi",strlen("This is lisi")+1,0);

	closesocket(sockClient);
	WSACleanup();

}