通过c++中的udp socket将派生类对象从一个进程发送到另一个进程

// 发送进程
#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <cstring>

class DerivedClass {
public:
    int data;

    DerivedClass(int d) : data(d) {}
};

int main() {
    // 创建UDP套接字
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) {
        std::cerr << "Failed to create socket" << std::endl;
        return 1;
    }

    // 设置目标地址和端口
    struct sockaddr_in destAddr{};
    destAddr.sin_family = AF_INET;
    destAddr.sin_port = htons(12345);
    inet_pton(AF_INET, "127.0.0.1", &(destAddr.sin_addr));

    // 序列化对象
    DerivedClass obj(42);
    char buffer[sizeof(obj)];
    std::memcpy(buffer, &obj, sizeof(obj));

    // 发送数据
    ssize_t sentBytes = sendto(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr*)&destAddr, sizeof(destAddr));
    if (sentBytes < 0) {
        std::cerr << "Failed to send data" << std::endl;
        return 1;
    }

    // 关闭套接字
    close(sockfd);

    return 0;
}

// 接收进程
#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <cstring>

class DerivedClass {
public:
    int data;

    DerivedClass(int d) : data(d) {}
};

int main() {
    // 创建UDP套接字
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) {
        std::cerr << "Failed to create socket" << std::endl;
        return 1;
    }

    // 绑定套接字到本地地址和端口
    struct sockaddr_in localAddr{};
    localAddr.sin_family = AF_INET;
    localAddr.sin_port = htons(12345);
    localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    if (bind(sockfd, (struct sockaddr*)&localAddr, sizeof(localAddr)) < 0) {
        std::cerr << "Failed to bind socket" << std::endl;
        return 1;
    }

    // 接收数据
    char buffer[sizeof(DerivedClass)];
    ssize_t receivedBytes = recvfrom(sockfd, buffer, sizeof(buffer), 0, nullptr, nullptr);
    if (receivedBytes < 0) {
        std::cerr << "Failed to receive data" << std::endl;
        return 1;
    }

    // 反序列化对象
    DerivedClass obj(0);
    std::memcpy(&obj, buffer, sizeof(obj));

    // 输出接收到的对象数据
    std::cout << "Received data: " << obj.data << std::endl;

    // 关闭套接字
    close(sockfd);

    return 0;
}