/*
 * Copyright 2016 Agustin Gonzalez  
 */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <arpa/inet.h>

int main(int argc, char **argv)
{
    char buf[10];
    int s, n, ns, len;
    struct sockaddr_in name;

    s = socket(AF_INET, SOCK_STREAM, 0);
    name.sin_family = AF_INET;
    name.sin_port = htons(atoi(argv[1]));
    name.sin_addr.s_addr = htonl(INADDR_ANY);
    len = sizeof(struct sockaddr_in);
    bind(s, (struct sockaddr *) &name, len);
    listen(s, 5);
    ns = accept(s, (struct sockaddr *) &name, &len);
    while ((n = recv(ns, buf, sizeof(buf), 0)) > 0)
        send(ns, buf, n, 0);
    close(ns);
    close(s);
	exit (0);
}