#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2017  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/>.       #
#                                                                             #
###############################################################################

wireless_mesh_to_wpa_supplicant() {
	local device="${1}"
	shift

	local file="${WPA_SUPPLICANT_CONF_DIR}/${device}.conf"

	local channel
	local mesh_id
	local psk

	local arg
	for arg in "$@"; do
		case "${arg}" in
			--channel=*)
				channel=$(cli_get_val "${arg}")
				;;
			--mesh-id=*)
				mesh_id=$(cli_get_val "${arg}")
				;;
			--pre-shared-key=*)
				psk=$(cli_get_val "${arg}")
				;;
			*)
				error "Unrecognized argument: ${arg}"
				return ${EXIT_ERROR}
				;;
		esac
	done

	if ! isset mesh_id; then
		error "Mesh ID is not set"
		return ${EXIT_ERROR}
	fi

	if ! wireless_channel_is_valid "${channel}"; then
		error "Invalid wireless channel given: ${channel}"
		return ${EXIT_ERROR}
	fi

	# Ensure we can write the file
	make_parent_directory "${file}"

	(
		# Write a config header
		wpa_supplicant_config_header

		print_indent 0 "# ${MESH_ID}"
		print_indent 0 "network={"
		print_indent 1 "ssid=\"${MESH_ID}\""
		print

		print_indent 1 "# Launch in 802.11s mesh mode"
		print_indent 1 "mode=5"
		print

		# Authentication
		print_indent 1 "# Authentication"
		if isset psk; then
			print_indent 1 "key_mgmt=SAE"
			print_indent 1 "psk=\"${psk}\""
		else
			print_indent 1 "key_mgmt=NONE"
		fi
		print

		# Frequency
		if isset channel; then
			print "	frequency=$(wireless_channel_to_frequency "${channel}")"
		fi

		print "}"
	) > ${file}
}