# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-src/rc-scripts/net-scripts/net.modules.d/adsl,v 1.15.4.1 2005/01/25 10:42:54 uberlord Exp $

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

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

# void adsl_depend(void)
#
# Sets up the dependancies for the module
adsl_depend() {
	after interface
	before dhcp
}

# bool adsl_check_installed(void)
#
# Returns 1 if rp-pppoe is installed, otherwise 0
adsl_check_installed() {
	[[ -x /usr/sbin/adsl-start ]] && return 0
	${1:-false} && eerror "For ADSL support, emerge net-dialup/rp-pppoe"
	return 1
}

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

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

	return 0
}

# bool adsl_setup_vars(char *iface)
#
# Checks to see if the ADSL script has been created or not
adsl_setup_vars() {
	local iface=${1}

	# Decide which configuration to use.  Hopefully there is an
	# interface-specific one
	cfgfile=/etc/ppp/pppoe-${iface}.conf
	[[ -f ${cfgfile} ]] || cfgfile=/etc/ppp/pppoe.conf

	if [[ ! -f ${cfgfile} ]]; then
		eerror "no pppoe.conf file found!"
		eerror "Please run adsl-setup to create one"
		return 1
	fi

	return 0
}

# bool adsl_start(char *iface)
#
# Start ADSL on an interface by calling adsl-start
#
# Returns 0 (true) when successful, non-zero otherwise
adsl_start() {
	local iface=${1} user ifvar=$( interface_variable ${1} ) cfgfile

	adsl_setup_vars ${iface} || return 1

	# Might or might not be set in conf.d/net
	eval user=\"\$\{adsl_user_${ifvar}\}\"

	# Start ADSL with the cfgfile, but override ETH and PIDFILE
	einfo "Starting ADSL for ${iface}"
	/usr/sbin/adsl-start <(cat ${cfgfile}; \
		echo "ETH=${iface}"; \
		echo "PIDFILE=/var/run/adsl-${iface}.pid"; \
		[[ -n ${user} ]] && echo "USER=${user}") \
		>${devnull}
	eend $? || return $?
	return 0
}

# bool adsl_stop(char *iface)
#
# Stop ADSL on an interface by calling adsl-stop
#
# Returns 0 (true) when there appears to be an ADSL interface to stop,
# and we attempted to stop it.  This does not necessarily indicate
# that adsl-stop was successful.  Returns non-zero when there was
# nothing to stop.
adsl_stop() {
	local iface=${1} cfgfile

	adsl_check_installed || return 1
	[[ ! -f /var/run/adsl-${iface}.pid ]] && return 1

	adsl_setup_vars ${iface} || return 1

	einfo "Stopping ADSL for ${iface}"
	/usr/sbin/adsl-stop <(cat ${cfgfile}; \
		echo "ETH=${iface}"; echo "PIDFILE=/var/run/adsl-${iface}.pid") \
		>${devnull}
	eend $?

	return 0  # we did *attempt* to stop adsl
}
