Windows下C语言的基于TCP的Socket编程

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说明

注意在windows平台是需要winsock2.h头文件的，不像在linux平台的socket编程，mac的话是有些问题满意后有时间就来解决一下

必须记载动态链接库：ws2_32.lib

如果你用的是Clion，里面的编译器要选择GCC的，因为VC++6.0是VC98的，所以里面没有，可以去网上下载，也可以用Devc++，这个软件自带有编译器，可以完成这个测试

服务端

#include <stdlib.h>
#include <stdio.h>
#include <winsock2.h>
#include <windows.h>
#pragma comment(lib,"ws2_32.lib")
 
int main(int argc, char* argv[])
{
	//初始化WSA
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA wsaData;
	if (WSAStartup(sockVersion, &wsaData) != 0)
	{
		return 0;
	}
 
	//创建套接字
	SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (slisten == INVALID_SOCKET)
	{
		printf("创建套接字失败 !");
		return 0;
	}
 
	//绑定IP和端口
	struct sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(8888);
	sin.sin_addr.S_un.S_addr = INADDR_ANY;
	if (bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
	{
		printf("绑定端口失败 !");
	}
 
	//开始监听
	if (listen(slisten, 5) == SOCKET_ERROR)
	{
		printf("监听失败 !");
		return 0;
	}
 
	//循环接收数据
	SOCKET sClient;
	struct sockaddr_in remoteAddr;
	int nAddrlen = sizeof(remoteAddr);
	printf("等待连接...\n");
	sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
	while (1)
	{
		char revData[255];
		if (sClient == INVALID_SOCKET)
		{
			printf("连接失败 !");
			continue;
		}
		printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));
 
		//接收数据
		int ret = recv(sClient, revData, 255, 0);
		if (ret > 0)
		{
			revData[ret] = 0x00;
			printf(revData);
		}
		//发送数据
		const char * sendData = "你好，TCP客户端！\n";
		send(sClient, sendData, strlen(sendData), 0);
	}
	closesocket(sClient);  //关闭一个套接口 
	closesocket(slisten);
	
	WSACleanup();  //WSACleanup()是一个计算机函数，功能是终止Winsock 2 DLL (Ws2_32.dll) 的使用 
	return 0;
}

客户端

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <windows.h>
#pragma comment(lib,"ws2_32.lib")
#include <STDIO.H>
int main(int argc, char* argv[])
{
	WORD sockVersion = MAKEWORD(2, 2);
	WSADATA data;
	if (WSAStartup(sockVersion, &data) != 0) //Windows异步套接字的启动命令 
	{
		return 0;
	}
 
	SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);  //创建套接字 
	if (sclient == INVALID_SOCKET)
	{
		printf("创建失败 !");
		return 0;
	}
	
	// 套接字结构体 
	struct sockaddr_in serAddr;
	serAddr.sin_family = AF_INET;
	serAddr.sin_port = htons(8888); 
	serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); 
	if (connect(sclient, (struct sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)  //连接 
	{
		printf("连接失败!");
		closesocket(sclient);
		return 0;
	}
	for (int i = 0; i < 1000; i++)
	{
 
		const char * sendData = "我是客户端\n";
		send(sclient, sendData, strlen(sendData), 0);
		char recData[255];
		int ret = recv(sclient, recData, 255, 0);//接受 
		if (ret > 0)
		{
	
			recData[ret] = 0x00;
			printf("%d%s",i,recData);
		}		
	}
	closesocket(sclient);   //关闭套接口 
	WSACleanup();   //功能是终止Winsock 2 DLL (Ws2_32.dll) 的使用  
	return 0;
}