网络编程windows

Windows 下的 编程

TCP

Server

// TCPServer.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#define _WINSOCK_DEPRECATED_NO_WARNINGS

#include <iostream>
#include <WinSock2.h> // 关键利用的 头文件

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

/*
1. 创建 socket
2. 绑定对应 ip 端口
3. 对绑定的 ip 端口进行监听
*/

int main()
{
    std::cout << "TCP Server running!\n";
	WSADATA wsaData;
	int port = 5099;

	char buf[] = "Server: hello, I am running!!!";

	// windows 下 要对 WSAsock 库进行一个初始化
	if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
	{
		std::cout << "Failed to load Winsock\n";
		return -1;
	}
	
	// 创建用于监听的 套接字 利用socket 返回
	SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);

	// 初始化
	SOCKADDR_IN addrSrv;
	addrSrv.sin_family = AF_INET;
	addrSrv.sin_port = htons(port); //1024以上的端口号
	addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);

	// 绑定对应的 数据
	int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof(SOCKADDR_IN));
	if (retVal == SOCKET_ERROR) {
		printf("Failed bind:%d\n", WSAGetLastError());
		return -1;
	}

	// 监听对应端口
	if (listen(sockSrv, 10) == SOCKET_ERROR) {
		printf("Listen failed:%d", WSAGetLastError());
		return -1;
	}
		
	// 客户请求的基本数据
	SOCKADDR_IN addrClient;
	int len = sizeof(SOCKADDR);

	// 等待 客户请求到来
	SOCKET sockConn = accept(sockSrv, (SOCKADDR *)&addrClient, &len);

	if (sockConn == SOCKET_ERROR)
	{
		std::cout << "Accept failed:" << WSAGetLastError() << "\n ";
		return -1;
	}

	printf("Accept client IP:[%s]\n", inet_ntoa(addrClient.sin_addr));

	// 发送消息
	// 利用 send 发送
	int iSend = send(sockConn, buf, sizeof(buf),0);
	if (iSend == SOCKET_ERROR)
	{
		printf("send failed");
	}

	char recvbuf[100];
	memset(recvbuf, 0, sizeof(recvbuf));

	// 接收数据
	recv(sockConn, recvbuf, sizeof(recvbuf), 0);
	std::cout <<  recvbuf << std::endl;


	closesocket(sockConn);
	closesocket(sockSrv);
	// 必须注销 winsock 相关的库
	WSACleanup();
	system("pause");


	return 1;

}

Client

// TCPClient.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <WinSock2.h>
#include <iostream>

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

int main()
{
    std::cout << "This is Client!\n";

	// 加载套接字
	WSADATA wsaData;
	char buf[1024];
	memset(buf, 0, sizeof(buf));

	if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
	{
		std::cout << "Failed to load Winsock" << std::endl;
		return -1;
	}

	SOCKADDR_IN addrSrv;
	addrSrv.sin_family = AF_INET;
	addrSrv.sin_port = htons(5099);
	addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

	// 创建套接字
	SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
	if (sockClient == SOCKET_ERROR)
	{
		std::cout << "Socket() error:" << WSAGetLastError() << std::endl;
		return -1;
	}

	// 向服务器发出连接请求
	if (connect(sockClient, (struct  sockaddr*)&addrSrv, sizeof(addrSrv)) == INVALID_SOCKET) {
		printf("Connect failed:%d", WSAGetLastError());
		return -1;
	}
	else
	{
		// 接受数据
		recv(sockClient, buf, sizeof(buf),0);
		std::cout << buf << std::endl;
	}

	// 发送数据
	char *buffSend = (char *)"hello, this is a Client....!!";
	send(sockClient, buffSend, strlen(buffSend) + 1, 0);
	std::cout << strlen(buffSend) + 1 << "  " << buffSend << std::endl;

	// 关闭套接字
	closesocket(sockClient);
	WSACleanup();
	system("pause");
		

	return 1;
}

赏

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