#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2013  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 he_tunnelbroker_endpoint_update() {
	local username
	local password
	local tunnel_id

	while [ $# -gt 0 ]; do
		case "${1}" in
			--username=*)
				username="$(cli_get_val ${1})"
				;;
			--password=*)
				password="$(cli_get_val ${1})"
				;;
			--tunnel-id=*)
				tunnel_id="$(cli_get_val ${1})"
				;;
		esac
		shift
	done

	assert isset username
	assert isset password
	assert isset tunnel_id

	# Send HTTP request.
	local response=$(http_GET --username="${username}" --password="${password}" \
		"https://ipv4.tunnelbroker.net/ipv4_end.php" "tid=${tunnel_id}")

	log DEBUG "Server response: ${response}"

	case "${response}" in
		"-ERROR: This tunnel is already associated with this IP address.*")
			# This is not really an error, because the right IP address is
			# already configured.
			;;
		"-ERROR:*")
			log ERROR "Tunnel endpoint address update not successful for tunnel ${tunnel_id}"
			return ${EXIT_ERROR}
			;;
	esac

	log INFO "Tunnel endpoint address has been updated for tunnel ${tunnel_id}"
	return ${EXIT_OK}
}