/***************************************************************************
 *   Copyright (C) 07/2007 by Olaf Rempel                                  *
 *   razzor@kopf-tisch.de                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; version 2 of the License                *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <string.h>
#include <getopt.h>
#include <signal.h>
#include <errno.h>

#include "configfile.h"
#include "conntrack.h"
#include "database.h"
#include "logging.h"

#define DEFAULT_CONFIG "ctstats.conf"
#define DEFAULT_LOGFILE "ctstats.log"
#define DEFAULT_INTERVALL 300

static struct option opts[] = {
	{"config",	1, 0, 'c'},
	{"debug",	0, 0, 'd'},
	{"help",	0, 0, 'h'},
	{0, 0, 0, 0}
};

static int sig_received = 0;

static void my_sighandler(int s)
{
	sig_received = 1;
}

int main(int argc, char *argv[])
{
	char *config = DEFAULT_CONFIG;
	int code, arg = 0, debug = 0;

	do {
		code = getopt_long(argc, argv, "c:dh", opts, &arg);

		switch (code) {
		case 'c':	/* config */
				config = optarg;
				break;

		case 'd':	/* debug */
				debug = 1;
				break;

		case 'h':	/* help */
				printf("Usage: ctstat [options]\n"
					"Options: \n"
					"  --config       -c  configfile  use this configfile\n"
					"  --debug        -d              do not fork and log to stderr\n"
					"  --help         -h              this help\n"
					"\n");
				exit(0);
				break;

		case '?':	/* error */
				exit(-1);
				break;

		default:	/* unknown / all options parsed */
				break;
		}
	} while (code != -1);

	/* parse config file */
	if (config_parse(config))
		exit(1);

	/* init netlink & hashtables */
	if (conntrack_init())
		exit(1);

	/* init database connection */
	if (database_init()) {
		conntrack_close();
		exit(1);
	}

	/* check logfile */
	const char *logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
	if (logfile != NULL && debug == 0) {
		/* start logging */
		if (log_init(logfile))
			exit(1);

		/* zum daemon mutieren */
		daemon(-1, 0);
	}

	log_print(LOG_EVERYTIME, "ctstats started (pid: %d)", getpid());

	signal(SIGINT, my_sighandler);
	signal(SIGTERM, my_sighandler);

	/* start event listener */
	conntrack_start_event_thread();

	int intervall = config_get_int("global", "intervall", DEFAULT_INTERVALL);

	struct timeval tv;
	tv.tv_sec = intervall;
	tv.tv_usec = 0;

	while (sig_received == 0) {
		select(0, NULL, NULL, NULL, &tv);
		errno = 0;

		tv.tv_sec = intervall;
		tv.tv_usec = 0;
		database_analyse();
	}

	database_close();
	conntrack_close();
	log_close();
	return 0;
}