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

# Contributed by Alin Nastac (mrness@gentoo.org)

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

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

# bool pppoe_check_installed(void)
#
# Returns 1 if pppd is installed, otherwise 0
pppoe_check_installed() {
	[[ -x /usr/sbin/pppd ]] || {
		eerror "For PPPoE support, emerge net-dialup/ppp"
		return 1
	}
	return 0
}

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

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

	return 0
}

# bool pppoe_setup_vars(char *iface)
#
# Read pppd parameters
pppoe_setup_vars() {
	local iface=${1}

	# Might or might not be set in conf.d/net
	eval user=\"\$\{pppoe_user_${ifvar}\}\"
	eval ondemand_idletime=\"\$\{pppoe_ondemand_idletime_${ifvar}\}\"
	eval mtu=\"\$\{pppoe_mtu_${ifvar}\}\"
	eval echo_interval=\"\$\{pppoe_echo_interval_${ifvar}\}\"
	eval echo_failure=\"\$\{pppoe_echo_failure_${ifvar}\}\"

	return 0
}

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

	pppoe_setup_vars ${iface} || return 1

	einfo "Starting PPPoE for ${iface}"
	[[ -n ${ondemand_idletime} ]] && \
		cmdline="${cmdline} demand idle ${ondemand_idletime} 10.112.112.112:10.112.112.113 \
				ipcp-accept-remote ipcp-accept-local connect true"
	cmdline="${cmdline} plugin rp-pppoe.so ${iface} remotename ${iface} linkname ${iface} \
			hide-password persist maxfail 0  default-asyncmap noipdefault noauth defaultroute \
			noaccomp noccp nobsdcomp nodeflate nopcomp novj novjccomp \
			lcp-echo-interval ${echo_interval:-15} lcp-echo-failure ${echo_failure:-3} \
			mtu ${mtu:-1492} mru ${mtu:-1492}"
	[[ -n ${user} ]] && \
		cmdline="${cmdline} user ${user}"
	${cmdline} &> /tmp/log.pppoe
	eend $?
}

# bool pppoe_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.
pppoe_stop() {
	local iface=${1} cfgfile pidfile=/var/run/ppp-${iface}.pid

	[[ ! -f ${pidfile} ]] && return 1

	local pid=$(head -n 1 ${pidfile})
	einfo "Stopping PPPoE for ${iface}"
	kill -s HUP ${pid} && \
		process_finished ${pid} /usr/sbin/pppd
	eend $?

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