#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2012  IPFire Network Development Team                         #
#                                                                             #
# 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 3 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, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

# This is a wrapper script which does some on-the-fly configuration of the
# pppoe-server daemon, which does not support any configuration files.

LOG_FACILITY="pppoe-server"
. /usr/lib/network/functions

# Read network settings
network_settings_read

zone=${1}
assert zone_exists ${zone}

action=${2}

# Read the configuration file of this hook.
zone_config_settings_read_by_hook "${zone}" "pppoe-server"
assert isset SUBNET

pppd_options="${RUN_DIR}/${zone}/pppoe-server-options"
pool_file="${RUN_DIR}/${zone}/pppoe-server-pool"

case "${action}" in
	cleanup)
		# Cleanup all temporary files.
		rm -f ${pppd_options} ${pool_file}

		exit ${EXIT_OK}
		;;

	*)
		# Don't let the server fork to background.
		pppoe_cmdline="-F"

		# Add the interface to listen to.
		pppoe_cmdline="${pppoe_cmdline} -I ${zone}"

		# Randomize session IDs.
		pppoe_cmdline="${pppoe_cmdline} -r"

		# Add the service name.
		if isset SERVICE_NAME; then
			pppoe_cmdline="${pppoe_cmdline} -S ${SERVICE_NAME// /_}"
		fi

		# Add the max. number of sessions per MAC address.
		if [ ${MAX_SESSIONS} -gt 0 ]; then
			pppoe_cmdline="${pppoe_cmdline} -x ${MAX_SESSIONS}"
		fi

		# Create the pppoe-server-options file.
		pppoe_server_options ${pppd_options} ${zone} \
			--dns-servers="${DNS_SERVERS}"
		pppoe_cmdline="${pppoe_cmdline} -O ${pppd_options}"

		# Configure the IP addresses.
		local_address=$(ipv4_get_network ${SUBNET})
		pppoe_cmdline="${pppoe_cmdline} -L ${local_address}"

		# Create the address pool.
		pppoe_server_poolfile ${pool_file} ${SUBNET}
		pppoe_cmdline="${pppoe_cmdline} -p ${pool_file}"

		log INFO "Starting pppoe-server daemon..."
		log DEBUG "pppoe-server options: ${pppoe_cmdline}"

		# Now exec the actual pppoe-server binary.
		exec /usr/sbin/pppoe-server ${pppoe_cmdline}

		error "Could not execute pppoe-server. Exiting."
		exit ${EXIT_ERROR}
	;;
esac

exit ${EXIT_ERROR}