计算机网络概述-Socket编程简单示例

最新推荐文章于 2023-07-19 21:27:38 发布

Rocky_96

最新推荐文章于 2023-07-19 21:27:38 发布

阅读量127

点赞数

CC 4.0 BY-SA版权

分类专栏：计算机基础文章标签：网络 udp c++

本文链接：https://blog.youkuaiyun.com/weixin_42093587/article/details/121966603

计算机基础专栏收录该内容

49 篇文章

订阅专栏

这篇博客展示了如何使用C++进行Socket编程，创建一个简单的TCP服务器监听5099端口，接收客户端连接，并进行数据的发送与接收。客户端则连接到服务器，发送消息并接收回应。示例代码涵盖了WSAStartup、socket、bind、listen、accept、send、recv等关键函数的使用。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

计算机网络概述-Socket编程简单示例

过程：
在这里插入图片描述

// server.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 <stdio.h>
#include <stdlib.h>

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

void main()
{
    WSADATA wsaData;
    int port = 5099;

    char buf[] = "Server: hello, I am a server.....";

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("Failed to load Winsock");
        return;
    }

    //创建用于监听的套接字
    SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);

    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);

    int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof(SOCKADDR_IN));
    if (retVal == SOCKET_ERROR) {
        printf("Failed bind:%d\n", WSAGetLastError());
        return;
    }

    if (listen(sockSrv, 10) == SOCKET_ERROR) {
        printf("Listen failed:%d", WSAGetLastError());
        return;
    }

    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) {
        printf("Accept failed:%d", WSAGetLastError());
        //break;
    }

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

    //发送数据
    int iSend = send(sockConn, buf, sizeof(buf), 0);
    if (iSend == SOCKET_ERROR) {
        printf("send failed");
        // break;
    }

    char recvBuf[100];
    memset(recvBuf, 0, sizeof(recvBuf));
    //         //接收数据
    recv(sockConn, recvBuf, sizeof(recvBuf), 0);
    printf("%s\n", recvBuf);

    closesocket(sockConn);


    closesocket(sockSrv);
    WSACleanup();
    system("pause");
}

// Client.cpp

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

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

void main()
{
    //加载套接字
    WSADATA wsaData;
    char buff[1024];
    memset(buff, 0, sizeof(buff));

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
    {
        printf("Failed to load Winsock");
        return;
    }

    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 (SOCKET_ERROR == sockClient) {
        printf("Socket() error:%d", WSAGetLastError());
        return;
    }

    //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;
    }
    else
    {
        //接收数据
        recv(sockClient, buff, sizeof(buff), 0);
        printf("%s\n", buff);
    }

    //发送数据
    const char* buffSend = "hello, this is a Client....";
    send(sockClient, buffSend, strlen(buffSend) + 1, 0);
    printf("%d", strlen(buffSend) + 1);

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