/* NetworkManager -- Network link manager
 *
 * Matthew Garrett <mjg59@srcf.ucam.org>
 *
 * Heavily based on NetworkManagerRedhat.c by Dan Williams <dcbw@redhat.com>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * (C) Copyright 2004 Matthew Garrett
 * (C) Copyright 2004 Red Hat, Inc.
 */

#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include "NetworkManagerSystem.h"
#include "NetworkManagerUtils.h"
#include "NetworkManagerDevice.h"


/*
 * nm_system_init
 *
 * Initializes the distribution-specific system backend
 *
 */
void nm_system_init (void)
{
}


/*
 * nm_system_device_run_dhcp
 *
 * Run the dhcp daemon for a particular interface.
 *
 * Returns:	TRUE on success
 *			FALSE on dhcp error
 *
 */
gboolean nm_system_device_run_dhcp (NMDevice *dev)
{
	char		 buf [500];
	char		*iface;
	int		 err;

	g_return_val_if_fail (dev != NULL, FALSE);

	/* Fake it for a test device */
	if (nm_device_is_test_device (dev))
	{
		g_usleep (2000);
		return (TRUE);
	}

	/* Unfortunately, dhclient can take a long time to get a dhcp address
	 * (for example, bad WEP key so it can't actually talk to the AP).
	 */
	iface = nm_device_get_iface (dev);
	snprintf (buf, 500, "/sbin/dhclient -pf /var/run/dhclient-%s.pid %s\n",
		  iface, iface);
	printf("Running %s",buf);
	err = nm_spawn_process (buf);
	return (err == 0);
}


/*
 * nm_system_device_stop_dhcp
 *
 * Kill any dhcp daemon that happens to be around.  We may be changing
 * interfaces and we're going to bring the previous one down, so there's
 * no sense in keeping the dhcp daemon running on the old interface.
 *
 */
void nm_system_device_stop_dhcp (NMDevice *dev)
{
	FILE			*pidfile;
	char			 buf [500];

	g_return_if_fail (dev != NULL);

	/* Not really applicable for test devices */
	if (nm_device_is_test_device (dev))
		return;

	/* Find and kill the previous dhclient process for this device */
	snprintf (buf, 500, "/var/run/dhclient-%s.pid", nm_device_get_iface (dev));
	pidfile = fopen (buf, "r");
	if (pidfile)
	{
		int			len;
		unsigned char	s_pid[20];
		pid_t		n_pid = -1;

		memset (s_pid, 0, 20);
		fgets (s_pid, 19, pidfile);
		len = strnlen (s_pid, 20);
		fclose (pidfile);

		n_pid = atoi (s_pid);
		if (n_pid > 0)
			kill (n_pid, SIGTERM);
	}
}


/*
 * nm_system_device_flush_routes
 *
 * Flush all routes associated with a network device
 *
 */
void nm_system_device_flush_routes (NMDevice *dev)
{
	char	buf [100];

	g_return_if_fail (dev != NULL);

	/* Not really applicable for test devices */
	if (nm_device_is_test_device (dev))
		return;

	/* Remove routing table entries */
	snprintf (buf, 100, "/sbin/ip route flush dev %s", nm_device_get_iface (dev));
	nm_spawn_process (buf);
}


/*
 * nm_system_device_flush_addresses
 *
 * Flush all network addresses associated with a network device
 *
 */
void nm_system_device_flush_addresses (NMDevice *dev)
{
	char	buf [100];

	g_return_if_fail (dev != NULL);

	/* Not really applicable for test devices */
	if (nm_device_is_test_device (dev))
		return;

	/* Remove all IP addresses for a device */
	snprintf (buf, 100, "/sbin/ip address flush dev %s", nm_device_get_iface (dev));
	nm_spawn_process (buf);
}


/*
 * nm_system_enable_loopback
 *
 * Bring up the loopback interface
 *
 */
void nm_system_enable_loopback (void)
{
	nm_spawn_process ("/sbin/ifup lo");
}


/*
 * nm_system_delete_default_route
 *
 * Remove the old default route in preparation for a new one
 *
 */
void nm_system_delete_default_route (void)
{
	nm_spawn_process ("/sbin/ip route del default");
}


/*
 * nm_system_kill_all_dhcp_daemons
 *
 * Kill all DHCP daemons currently running, done at startup.
 *
 */
void nm_system_kill_all_dhcp_daemons (void)
{
	nm_spawn_process ("/usr/bin/killall dhclient");
}


/*
 * nm_system_update_dns
 *
 * Make glibc/nscd aware of any changes to the resolv.conf file by
 * restarting nscd.
 *
 */
void nm_system_update_dns (void)
{
	nm_spawn_process ("/usr/sbin/invoke-rc.d nscd restart");
}


/*
 * nm_system_load_device_modules
 *
 * This is a null op - all our drivers should already be loaded.
 *
 */
void nm_system_load_device_modules (void)
{
	return;
}