/* simple TCP traceroute example, using libglouglou */

#include <sys/types.h>

#if !defined(__OpenBSD__)
#define __USE_GNU
#define _GNU_SOURCE
#endif

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

#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <err.h>

#include <libglouglou.h> /* for get_iface() and droppriv() */
#include <libggnet_traceroute.h>

static void _cb_done(struct ggnet_traceroute_req *, void *);

struct event_base *_ev_base;

int
main(int argc, char *argv[])
{
	struct ggnet_traceroute *ggtr;
	struct ggnet_traceroute_req *req;
	struct addr ip;
	struct timeval tv;
	int verbose = 0;

	if (argc < 2) {
		printf("usage: traceroute <ip>\n");
		exit(1);
	}
	addr_aton(argv[1], &ip);

	bzero(&tv, sizeof(struct timeval));
	tv.tv_sec = 10;

	_ev_base = event_base_new();

	ggtr = ggnet_traceroute_new(_ev_base, get_iface(argv[1]), verbose);
	droppriv("nobody", 1, NULL); /* bad practise, use dedicated user */
	req = ggnet_traceroute_trace_tcp(ggtr, &ip, 80,
					 _cb_done, NULL, NULL);

	event_base_loopexit(_ev_base, &tv);
	event_base_dispatch(_ev_base);

	printf("REPORT for %s:\n%s\n", addr_ntoa(&ip),
		ggnet_traceroute_report(req));

	return 0;
}

static void
_cb_done(struct ggnet_traceroute_req *req, void *data)
{
	printf("traceroute: done !\n");
	event_base_loopexit(_ev_base, NULL);
}