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[people/ms/network.git] / src / hooks / ports / batman-adv-port

#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2013 Michael Tremer                                           #
#                                                                             #
# 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 MESH_ID SSID CHANNEL COUNTRY_CODE PHY"

ADDRESS=$(mac_generate)
CHANNEL=1
COUNTRY_CODE="US"
MESH_ID=
SSID=

# batman-adv inserts an additional header of 28 bytes, so we set the MTU
# to 1528, that normal ethernet packets with 1500 bytes can pass the network.
MTU=1528

function hook_check() {
	assert isset ADDRESS
	assert ismac ADDRESS
	assert isset CHANNEL
	assert isset COUNTRY_CODE
	assert isset MESH_ID
	assert ismac MESH_ID
	assert isset PHY
	assert ismac PHY
	assert isset SSID
}

function hook_create() {
	while [ $# -gt 0 ]; do
		case "${1}" in
			--address=*)
				ADDRESS=$(cli_get_val ${1})
				;;
			--channel=*)
				CHANNEL=$(cli_get_val ${1})
				;;
			--country-code=*)
				COUNTRY_CODE=$(cli_get_val ${1})
				;;
			--phy=*)
				PHY=$(cli_get_val ${1})
				;;
			--ssid=*)
				SSID=$(cli_get_val ${1})
				;;
			--mesh-id=*)
				MESH_ID=$(cli_get_val ${1})
				;;
			*)
				warning "Ignoring unknown argument '${1}'"
				;;
		esac
		shift
	done

	# Save address of phy do identify it again
	PHY=$(phy_get ${PHY})
	PHY=$(phy_get_address ${PHY})

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

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

	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
			--channel=*)
				CHANNEL=$(cli_get_val ${1})
				;;
			--country-code=*)
				COUNTRY_CODE=$(cli_get_val ${1})
				;;
			--mesh-id=*)
				MESH_ID=$(cli_get_val ${1})
				;;
			--ssid=*)
				SSID=$(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})

	# Check if the PHY is present.
	local phy=$(phy_get ${PHY})
	if ! isset phy; then
		log DEBUG "phy '${PHY}' is not present"
		exit ${EXIT_ERROR}
	fi

	# Create the wireless device, if it does not exist, yet.
	if ! device_exists ${port}; then
		wireless_create ${port} \
			--address="${ADDRESS}" \
			--phy="${phy}" \
			--type="ibss"
	fi

	# Set the MTU.
	device_set_mtu "${port}" "${MTU}"

	# Join the ad-hoc network.
	wireless_ibss_join "${port}" --channel="${CHANNEL}" \
		--bssid="${MESH_ID}" --essid="${SSID}"

	# Add the device as a batman-adv device.
	local parent="$(_find_parent ${port})"
	if isset parent; then
		batman_adv_interface_add "${parent}" "${port}"
	fi

	exit ${EXIT_OK}
}

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

	# Remove the batman-adv device.
	batman_adv_interface_del "${port}"

	# Leave the ad-hoc network.
	wireless_ibss_leave "${port}"

	# Remove the device if it is still present.
	if device_exists ${port}; then
		wireless_remove ${port}
	fi

	exit ${EXIT_OK}
}

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

	local phy=${2}
	assert isset phy

	assert port_exists ${port}

	# Read configuration of port.
	config_read $(port_file ${port})

	# Get the address of the phy.
	local phy_address=$(phy_get_address ${phy})

	# Check if the phy is the same we have
	# read from the configuration file.
	if [ "${PHY}" = "${phy_address}" ]; then
		# Bring up the device.
		port_up "${port}"
	fi

	exit ${EXIT_OK}
}

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

	local p child hook
	for p in $(ports_get); do
		hook=$(port_get_hook "${p}")

		if [ "${hook}" = "batman-adv" ]; then
			for child in $(port_get_children "${p}"); do
				log ERROR "child=${child}"
				[ "${child}" = "${port}" ] || continue

				print "${p}"
				return ${EXIT_OK}
			done
		fi
	done

	return ${EXIT_ERROR}
}