---

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

int main() {
    int server_fd, client_fd;
    struct sockaddr_in server_addr, client_addr;
    socklen_t addr_len = sizeof(client_addr);
    char buffer[256];

    server_fd = socket(AF_INET, SOCK_STREAM, 0);
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    server_addr.sin_port = htons(12345);
    bind(server_fd, (struct sockaddr*)&server_addr, sizeof(server_addr));
    listen(server_fd, 1);
    printf("TCP эхо-сервер запущен на порту 12345. Ожидаю клиента...\n");

    client_fd = accept(server_fd, (struct sockaddr*)&client_addr, &addr_len);
    printf("Клиент подключился.\n");

    while (1) {
        memset(buffer, 0, sizeof(buffer));
        recv(client_fd, buffer, sizeof(buffer), 0);
        printf("Получено: %s", buffer);
        if (strncmp(buffer, "quit", 4) == 0)
            break;
        send(client_fd, buffer, strlen(buffer), 0);
    }
    close(client_fd);
    close(server_fd);
    return 0;
}