#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Babel mesh functions
#
# License
# =======
#
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Babel mesh
ENABLE_BABEL="no"
BABEL_PORT=6696

function remove_babel {
    if ! grep -Fxq "mesh_babel" $COMPLETION_FILE; then
        return
    fi

    ${PROJECT_NAME}-mesh-install -f babel --remove yes
    if [ ! "$?" = "0" ]; then
        echo $'Failed to remove babel'
        exit 83658
    fi

    iptables -D INPUT -i $WIFI_INTERFACE -p udp --dport $BABEL_PORT -j ACCEPT
    function_check save_firewall_settings
    save_firewall_settings

    sed -i '/mesh_babel/d' $COMPLETION_FILE
    sed -i '/configure_firewall_for_babel/d' $COMPLETION_FILE
}

function configure_firewall_for_babel {
    if grep -Fxq "configure_firewall_for_babel" $COMPLETION_FILE; then
        return
    fi
    if [[ $ENABLE_BABEL != "yes" ]]; then
        return
    fi
    iptables -A INPUT -i $WIFI_INTERFACE -p udp --dport $BABEL_PORT -j ACCEPT
    function_check save_firewall_settings
    save_firewall_settings

    OPEN_PORTS+=("Babel    $BABEL_PORT")
    echo 'configure_firewall_for_babel' >> $COMPLETION_FILE
}

function mesh_babel {
    if grep -Fxq "mesh_babel" $COMPLETION_FILE; then
        return
    fi
    if [[ $ENABLE_BABEL != "yes" ]]; then
        return
    fi

    ${PROJECT_NAME}-mesh-install -f babel
    if [ ! "$?" = "0" ]; then
        echo $'Failed to install babel'
        exit 67242
    fi

    function_check configure_firewall_for_babel
    configure_firewall_for_babel
    echo 'mesh_babel' >> $COMPLETION_FILE
}

# NOTE: deliberately there is no "exit 0"
