c中是否有P2P框架？

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>

#define PORT 12345

int main(int argc, char const *argv[])
{
    int sock = 0, valread;
    struct sockaddr_in serv_addr;
    char* message = "Hello from client";
    char buffer[1024] = {0};
    int opt = 1;
    int addrlen = sizeof(serv_addr);
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    serv_addr.sin_port = htons(PORT);

    // 创建套接字
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == 0)
    {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // 防止“address already in use”错误
    if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt)))
    {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }

    // 绑定套接字
    if (bind(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
    {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // 开始监听
    if (listen(sock, 3) < 0)
    {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    // 接受客户端连接
    if ((valread = accept(sock, (struct sockaddr *)&serv_addr, (socklen_t*)&addrlen)) < 0)
    {
        perror("accept");
        exit(EXIT_FAILURE);
    }

    // 读取客户端消息
    if (read(valread, buffer, 1024) < 0)
    {
        perror("read");
        exit(EXIT_FAILURE);
    }

    // 打印客户端消息
    printf("Received from client: %s\n", buffer);

    // 发送回复消息
    if (send(valread, message, strlen(message), 0) < 0)
    {
        perror("send");
        exit(EXIT_FAILURE);
    }

    // 关闭套接字
    close(sock);

    return 0;
}