VS2019：基于UDP协议的回声服务器-Windows系列-PHP中文网

VS2019：基于UDP协议的回声服务器

蓮花仙者

发布： 2025-07-17 08:04:01

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在windows环境下使用vs2019编译的udp服务器和客户端代码示例，展示了如何实现基于udp协议的回声服务器。以下是对这两个代码文件的伪原创处理，同时保持原有功能不变，并保留图片位置和原始格式：

UDP_Server.cpp

#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")  // 链接 ws2_32.dll
#pragma warning(disable : 4996)
#define BUFFER_SIZE 100

int main() {
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    // 初始化套接字，使用UDP协议
    SOCKET socketHandle = socket(AF_INET, SOCK_DGRAM, 0);

    // 设置并绑定服务器地址
    sockaddr_in serverAddress;
    memset(&serverAddress, 0, sizeof(serverAddress));  // 清零服务器地址结构
    serverAddress.sin_family = PF_INET;  // 使用IPv4
    serverAddress.sin_addr.s_addr = htonl(INADDR_ANY); // 自动分配IP地址
    serverAddress.sin_port = htons(8000);  // 设置端口号为8000
    bind(socketHandle, (SOCKADDR*)&serverAddress, sizeof(SOCKADDR));

    // 准备接收和发送数据
    SOCKADDR clientAddress;  // 客户端地址信息
    int clientAddressSize = sizeof(SOCKADDR);
    char buffer[BUFFER_SIZE];  // 数据缓冲区

    while (1) {
        int receivedLength = recvfrom(socketHandle, buffer, BUFFER_SIZE, 0, &clientAddress, &clientAddressSize);
        sendto(socketHandle, buffer, receivedLength, 0, &clientAddress, clientAddressSize);
    }

    closesocket(socketHandle);
    WSACleanup();
    return 0;
}

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UDP_Client.cpp

#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")  // 链接 ws2_32.dll
#pragma warning(disable : 4996)
#define BUFFER_SIZE 100

int main() {
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    // 创建UDP客户端套接字
    SOCKET socketHandle = socket(PF_INET, SOCK_DGRAM, 0);

    // 设置服务器地址
    sockaddr_in serverAddress;
    memset(&serverAddress, 0, sizeof(serverAddress));  // 清零服务器地址结构
    serverAddress.sin_family = PF_INET;
    serverAddress.sin_addr.s_addr = inet_addr("127.0.0.1");
    serverAddress.sin_port = htons(8000);

    // 持续发送和接收数据
    sockaddr fromAddress;
    int fromAddressSize = sizeof(fromAddress);
    while (1) {
        char buffer[BUFFER_SIZE] = { 0 };
        printf("请输入字符串: ");
        gets_s(buffer);
        sendto(socketHandle, buffer, strlen(buffer), 0, (struct sockaddr*)&serverAddress, sizeof(serverAddress));
        int receivedLength = recvfrom(socketHandle, buffer, BUFFER_SIZE, 0, &fromAddress, &fromAddressSize);
        buffer[receivedLength] = 0;
        printf("来自服务器的消息: %s\n", buffer);
    }

    closesocket(socketHandle);
    WSACleanup();
    return 0;
}

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运行截图：