/* Copyright (C) 2003 Timo Sirainen, LGPLv2.1 */

/* Installation:

   export dovecot=~/src/dovecot

   gcc -Wall -W -shared -fPIC -DHAVE_CONFIG_H -I$dovecot -I$dovecot/src/lib \
   drac.c -o drac.so -ldrac

   cp drac.so /usr/local/lib/dovecot/imap/
   cp drac.so /usr/local/lib/dovecot/pop3/
*/

#include "lib.h"
#include "ioloop.h"
#include "network.h"

#include <stdlib.h>

#define DRAC_TIMEOUT_SECS 60
#define DRAC_HOST "localhost"

int dracauth(char *host, unsigned long ip, char **errmsg);

static struct timeout *to_drac = NULL;
static unsigned long in_ip;

static void drac_timeout(void *context __attr_unused__)
{
	char *err;

	if (dracauth(DRAC_HOST, in_ip, &err) != 0)
		i_error("dracauth() failed: %s", err);
}

void drac_init(void)
{
	const char *ip_str;
	struct ip_addr ip;

	ip_str = getenv("IP");
	if (ip_str == NULL)
		i_error("DRAC: IP environment not given");
	else if (net_addr2ip(ip_str, &ip) < 0)
		i_error("DRAC: net_ip2addr(%s) failed: %m", ip_str);
	else if (!IPADDR_IS_V4(&ip))
		i_error("DRAC: Only IPv4 addresses are supported (%s)", ip_str);
	else {
		in_ip = ((struct in_addr *) &ip.ip)->s_addr;
		drac_timeout(NULL);
		to_drac = timeout_add(1000*DRAC_TIMEOUT_SECS,
				      drac_timeout, NULL);
	}
}

void drac_deinit(void)
{
	if (to_drac != NULL)
		timeout_remove(&to_drac);
}