# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header$

# Contributed by Roy Marples (uberlord@gentoo.org)

# char* iptunnel_provides(void)
#
# Returns a string to change module definition for starting up
iptunnel_provides() {
	echo "iptunnel"
}

# void iptunnel_depend(void)
#
# Sets up the dependancies for the module
iptunnel_depend() {
	after wireless
	before interface
}

# bool iptunnel_check_installed(void)
#
# Tunnelling is provided by the interface
iptunnel_check_installed() {
	return 0
}

# bool iptunnel_check_depends(void)
#
# Checks to see if we have the needed functions
iptunnel_check_depends() {
	local f

	for f in interface_exists interface_variable interface_tunnel; do
		[[ $( type -t ${f} ) == function ]] && continue
		eerror "iptunnel: missing required function ${f}\n"
		return 1
	done

	return 0
}

# char* iptunnel_get_vars(char *interface)
#
# Returns a string spaced with possible user set
# configuration variables
iptunnel_get_vars() {
	echo "iptunnel_${1}"
}

# bool iptunnel_pre_start(char *iface)
#
# Create the device, give it the right perms
iptunnel_pre_start() {
	local iface=${1} opts itype=$( interface_type ${1} )
	local ifvar=$( interface_variable ${iface} )

	# Get our options
	eval opts=\"\$\{iptunnel_${ifvar}\}\"
	[[ -z ${opts} ]] && return 0

	ebegin "Creating tunnel ${iface}"
	interface_tunnel add ${iface} ${opts} >${devnull}
	eend $?
	return $?

}

# bool iptunnel_stop(char *iface)
#
# Removes the device
iptunnel_stop() {
	local iface=${1}
	
	interface_exists ${iface} || return 0
	[[ -z $( interface_tunnel show ${iface} 2>/dev/null ) ]] && return 0
	
	ebegin "Destroying tunnel ${iface}"
	interface_tunnel del ${iface} >${devnull}
	eend $?
	return $?
}
