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

MACVLAN_PORT_INTERFIX="mv"

function macvlan_create() {
	local device=${1}
	assert isset device

	local parent=${2}
	assert isset parent

	local address=${3}
	assert ismac address

	# Check if the parent device exists.
	if ! device_exists ${parent}; then
		log ERROR "macvlan: parent device '${parent}' does not exist"
		return ${EXIT_ERROR}
	fi

	# Check if the device we want to create does not already exist.
	if device_exists ${device}; then
		log ERROR "macvlan: device '${device}' already exists"
		return ${EXIT_ERROR}
	fi

	# The macvlan device cannot be created, when the parent device
	# is attached to a bridge. So we detach the parent device and
	# reattach it again.
	local bridge
	if device_is_bridge_attached ${parent}; then
		bridge=$(device_get_bridge ${parent})

		# Detach the parent device.
		bridge_detach_device ${bridge} ${parent}
	fi

	# Actually create the device.
	cmd_quiet ip link add link ${parent} name ${device} address ${address} \
		type macvlan
	local ret=$?

	if [ ${ret} -eq ${EXIT_OK} ]; then
		log DEBUG "macvlan device '${device}' has been created"
	else
		log ERROR "Could not create macvlan device '${device}': ${ret}"
	fi

	# Re-attach device.
	if isset bridge; then
		bridge_attach_device ${bridge} ${parent}
	fi

	return ${ret}
}

function macvlan_remove() {
	local device=${1}
	assert isset device

	device_delete ${device}
}