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

function switch_start() {
	local service="openvswitch.service"

	if ! service_is_active "${service}"; then
		service_start "${service}"
	fi

	return ${EXIT_OK}
}

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

	# Make sure that the openvswitch service is running.
	switch_start

	log DEBUG "Creating virtual switch: ${device}"
	ovs-vsctl -- --may-exist add-br ${device}

	assert device_exists ${device}

	return ${EXIT_OK}
}

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

	# Set device down.
	device_set_down ${device}

	log DEBUG "Removing virtual switch: ${device}"
	ovs-vsctl -- --if-exists del-br ${device}

	return ${EXIT_OK}
}

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

	ovs-vsctl -- br-exists ${device}
	case "$?" in
		0)
			return ${EXIT_TRUE}
			;;
		2)
			return ${EXIT_FALSE}
			;;
	esac

	return ${EXIT_ERROR}
}

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

	ovs-vsctl -- list-ports ${device}
	return ${EXIT_OK}
}

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

	local port=${2}
	assert isset port

	log DEBUG "Attaching port '${port}' to switch '${device}'"
	ovs-vsctl -- --may-exist add-port "${device}" "${port}"

	return ${EXIT_OK}
}

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

	local port=${2}
	assert isset port

	log DEBUG "Detaching port '${port}' from switch '${device}'"
	ovs-vsctl -- --if-exists del-port "${device}" "${port}"

	return ${EXIT_OK}
}

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

	log DEBUG "Enable STP on switch ${device}"
	ovs-vsctl set Bridge ${device} "stp_enable=true"

	return ${EXIT_OK}
}

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

	log DEBUG "Disable STP on switch ${device}"
	ovs-vsctl set Bridge ${device} "stp_enable=false"

	return ${EXIT_OK}
}

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

	local output=$(ovs-vsctl -- --if-exists get Bridge ${device} stp_enable)

	if enabled output; then
		return ${EXIT_TRUE}
	fi

	return ${EXIT_FALSE}
}