/***************************************************************************
 *   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 <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <mysql/mysql.h>

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

static MYSQL *dbh;

static void purge_hash_cb(const struct hash_entry *entry, void *privdata)
{
	int long *now = (long *)privdata;
	char query[256];

	int len = snprintf(query, sizeof(query),
		"INSERT INTO stats SET timestamp='%lu', srcip='%u', proto='%u', dport='%u', flags='%u', srcbytes='%llu', dstbytes='%llu', count='%u'",
		*now, ntohl(entry->src_ip), entry->protonum, ntohs(entry->dst_port),
		entry->flags, entry->src_bytes, entry->dst_bytes, entry->count);

	if (mysql_real_query(dbh, query, len +1) != 0)
		log_print(LOG_WARN, "purge_hash_cb: mysql_real_query(): %s", mysql_error(dbh));
}

int database_analyse(void)
{
	struct hash_table *hash = conntrack_get_hash();

	if (mysql_ping(dbh) != 0) {
		log_print(LOG_WARN, "database_analyse: mysql_ping(): %s", mysql_error(dbh));
		purge_hash(hash, NULL, NULL);
		return 0;
	}

	long now = time(NULL);
	purge_hash(hash, purge_hash_cb, (void *)&now);
	return 0;
}

int database_init(void)
{
	dbh = mysql_init(NULL);
	if (dbh == NULL) {
		log_print(LOG_ERROR, "database_init: mysql_init(): %s", mysql_error(dbh));
		return -1;
	}

	const char *hostname = config_get_string("mysql", "hostname", NULL);
	const char *username = config_get_string("mysql", "username", NULL);
	const char *password = config_get_string("mysql", "password", NULL);
	MYSQL *ret = mysql_real_connect(dbh, hostname, username, password, NULL, 0, NULL, 0);
	if (ret != dbh) {
		log_print(LOG_ERROR, "database_init: mysql_real_connect(): %s", mysql_error(dbh));
		mysql_close(dbh);
		return -1;
	}

	const char *database = config_get_string("mysql", "database", NULL);
	if (mysql_select_db(dbh, database) != 0) {
		log_print(LOG_ERROR, "database_init: mysql_select_db(): %s", mysql_error(dbh));
		mysql_close(dbh);
		return -1;
	}
	return 0;
}

int database_close(void)
{
	mysql_close(dbh);
	return 0;
}