/*
 * discard
 * Written in 2020-2021 by Lucas
 * CC0 1.0 Universal/Public domain - No rights reserved
 *
 * To the extent possible under law, the author(s) have dedicated all
 * copyright and related and neighboring rights to this software to the
 * public domain worldwide. This software is distributed without any
 * warranty. You should have received a copy of the CC0 Public Domain
 * Dedication along with this software. If not, see
 * <http://creativecommons.org/publicdomain/zero/1.0/>.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

static void
usage(void)
{
	fprintf(stderr, "Usage: %s -t | -u\n", getprogname());
	exit(1);
}

int
main(int argc, char *argv[])
{
	const char *port = NULL;
	int ch, do_tcp, do_udp;

	do_tcp = do_udp = 0;
	while ((ch = getopt(argc, argv, "tu")) != -1) {
		switch (ch) {
		case 't':
			do_tcp = 1;
			break;
		case 'u':
			do_udp = 1;
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	port = geteuid() == 0 ? "discard" : "9999";

	if (argc > 0)
		usage();
	if (!do_tcp && !do_udp)
		errx(1, "one of -t or -u is needed");
	if (do_tcp && do_udp)
		errx(1, "-t and -u are mutually exclusive");
	if (do_udp)
		errx(1, "UDP unimplemented");
	if (do_tcp)
		errx(1, "TCP unimplemented");

	return 0;
}