#!/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/>.       #
#                                                                             #
###############################################################################

. /usr/lib/network/header-port

HOOK_SETTINGS="HOOK ADDRESS"

function hook_check() {
	assert ismac ADDRESS
}

function hook_create() {
	while [ $# -gt 0 ]; do
		case "${1}" in
			--address=*)
				ADDRESS=$(cli_get_val ${1})
				;;
			*)
				warning "Unknown argument '${1}'"
				;;
		esac
		shift
	done

	# Generate a random MAC address if non was set.
	if ! isset ADDRESS; then
		ADDRESS=$(mac_generate)
	fi

	local port=$(port_find_free ${DUMMY_PORT_PATTERN})
	assert isset port

	if config_write $(port_file ${port}) ${HOOK_SETTINGS}; then
		log INFO "New dummy port '${port}' has been created"
	fi

	exit ${EXIT_OK}
}

function hook_edit() {
	local port=${1}
	assert isset port
	shift

	config_read $(port_file ${port})

	while [ $# -gt 0 ]; do
		case "${1}" in
			--address=*)
				ADDRESS=$(cli_get_val ${1})
				;;
			*)
				warning "Unknown argument '${1}'"
				;;
		esac
		shift
	done

	config_write $(port_file ${port}) ${HOOK_SETTINGS}

	exit ${EXIT_OK}	
}

function hook_up() {
	local port=${1}
	assert isset port

	config_read $(port_file ${port})

	# Create device if not already exists.
	if ! device_exists ${port}; then
		dummy_create ${port} "${ADDRESS}"
	fi

	# Bring up the port.
	device_set_up ${port}

	exit ${EXIT_OK}
}

function hook_down() {
	local port=${1}
	assert isset port

	if ! device_exists ${port}; then
		exit ${EXIT_OK}
	fi

	# Tear down the port.
	device_set_down ${port}

	# Remove the dummy port.
	dummy_remove ${port}

	exit ${EXIT_OK}
}

function hook_hotplug_rename() {
	local port=${1}
	assert isset port

	local device=${2}
	assert isset device

	config_read $(port_file ${port})

	if [ "${ADDRESS}" = "$(device_get_address ${device})" ]; then
		log DEBUG "Device '${device}' equals port '${port}'."
		exit ${EXIT_OK}
	fi

	log DEBUG "Device '${device}' does not equal port '${port}'."
	exit ${EXIT_ERROR}
}