#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2010  Michael Tremer & Christian Schmidt                      #
#                                                                             #
# 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/>.       #
#                                                                             #
###############################################################################

. /lib/network/header-zone

HOOK_SETTINGS="HOOK STP STP_FORWARD_DELAY STP_HELLO STP_MAXAGE MAC MTU"

# Default values
MAC=$(mac_generate)
MTU=1500
STP="on"
STP_FORWARD_DELAY=0
STP_HELLO=2
STP_MAXAGE=20

function _check() {
	assert ismac MAC
	assert isbool STP
	assert isinteger STP_HELLO
	assert isinteger STP_FORWARD_DELAY
	assert isinteger MTU
}

function _parse_cmdline() {
	while [ $# -gt 0 ]; do
		case "${1}" in
			--stp=*)
				STP=${1#--stp=}
				;;
			--stp-hello=*)
				STP_HELLO=${1#--stp-hello=}
				;;
			--stp-forward-delay=*)
				STP_FORWARD_DELAY=${1#--stp-forward-delay=}
				;;
			--mtu=*)
				MTU=${1#--mtu=}
				;;
			--mac=*)
				MAC=${1#--mac=}
				;;
			*)
				warning "Ignoring unknown option '${1}'"
				;;
		esac
		shift
	done
}

function _up() {
	local zone=${1}
	shift

	config_read ${ZONE_DIR}/${zone}/settings

	if ! device_exists ${zone}; then
		brctl addbr ${zone}
	fi

	[ -n "${MAC}" ] && device_set_mac ${zone} ${MAC}
	[ -n "${MTU}" ] && device_set_mtu ${zone} ${MTU} 

	# Enable STP
	if enabled STP; then
		brctl stp ${zone} on

		if [ -n "${STP_FORWARD_DELAY}" ]; then
			brctl setfd ${zone} ${STP_FORWARD_DELAY}
		fi

		if [ -n "${STP_HELLO}" ]; then
			brctl sethello ${zone} ${STP_HELLO}
		fi

		if [ -n "${STP_MAXAGE}" ]; then
			brctl setmaxage ${zone} ${STP_MAXAGE}
		fi
	else
		brctl stp ${zone} off
	fi

	device_set_up ${zone}

	# Bring all ports up
	zone_ports_up ${zone}

	# XXX Do we need this?
	# Wait until bridge is forwarding
	# which is needed by dhcp client
	#if enabled STP; then
	#	bridge_is_forwarding ${zone}
	#fi

	zone_configs_up ${zone}

	event_interface_up ${zone}

	exit $?
}

function _down() {
	local zone=${1}
	shift

	if ! device_is_up ${zone}; then
		warning "Zone '${zone}' is not up"
		exit ${EXIT_OK}
	fi

	event_interface_down ${zone}

	zone_configs_down ${zone}
	zone_ports_down ${zone}

	device_set_down ${zone}
	brctl delbr ${zone}

	exit $?
}

function _addport() {
	local zone=${1}
	local hook=${2}
	shift 2

	if ! hook_exists port ${hook}; then
		error "Hook does not exist '${hook}'"
		exit ${EXIT_ERROR}
	fi

	port_hook ${hook} add ${zone}
}

run $@