#!/bin/sh
### BEGIN INIT INFO
# Provides:          vpncloud
# Required-Start:    $network $remote_fs
# Required-Stop:     $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: VpnCloud
# Description:       VpnCloud - Peer-to-Peer VPN
### END INIT INFO

# Author: Dennis Schwerdel <schwerdel@informatik.uni-kl.de>
# Copyright (C) 2015-2016  Dennis Schwerdel
# This software is licensed unter GPL-3 or newer (see LICENSE.md)


# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="VpnCloud"           # Introduce a short description here
NAME=vpncloud             # Introduce the short server's name here
SCRIPTNAME=/etc/init.d/$NAME
NETCONFIGS=/etc/vpncloud

# default settings
USER=root
GROUP=root
UMASK=022

NETWORKS=$(for net in $(ls $NETCONFIGS); do basename $net .net; done);

DAEMON=$(which $NAME)

# Exit if the package is not installed
[ -x $DAEMON ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

do_status() {
  for net in $NETWORKS; do
    if start-stop-daemon --status --pidfile /run/$NAME-$net.pid --name $NAME; then
      echo -e "\t$net"
    fi
  done
}

do_start() {
  # Return
  #   0 if daemon has been started
  #   1 if daemon was already running
  #   2 if daemon could not be started
  for net in $NETWORKS; do
    ENABLED=0
    unset DEVICE LISTEN TYPE MODE SHARED_KEY CRYPTO IFUP IFDOWN NETWORK_ID PEER_TIMEOUT DST_TIMEOUT PEERS SUBNETS
    [ -f "$NETCONFIGS/$net.net" ] && . $NETCONFIGS/$net.net
    if [ $ENABLED -eq 1 ]; then
      PARAMS=""
      [ -z "$DEVICE" ] || PARAMS="$PARAMS --device $DEVICE"
      [ -z "$LISTEN" ] || PARAMS="$PARAMS --listen $LISTEN"
      [ -z "$TYPE" ] || PARAMS="$PARAMS --type $TYPE"
      [ -z "$MODE" ] || PARAMS="$PARAMS --mode $MODE"
      [ -z "$SHARED_KEY" ] || PARAMS="$PARAMS --shared-key '$SHARED_KEY'"
      [ -z "$CRYPTO" ] || PARAMS="$PARAMS --crypto $CRYPTO"
      [ -z "$IFUP" ] || PARAMS="$PARAMS --ifup '$IFUP'"
      [ -z "$IFDOWN" ] || PARAMS="$PARAMS --ifdown '$IFDOWN'"
      [ -z "$NETWORK_ID" ] || PARAMS="$PARAMS --network-id $NETWORK_ID"
      [ -z "$PEER_TIMEOUT" ] || PARAMS="$PARAMS --peer-timeout $PEER_TIMEOUT"
      [ -z "$DST_TIMEOUT" ] || PARAMS="$PARAMS --peer-timeout $DST_TIMEOUT"
      for peer in $PEERS; do
        PARAMS="$PARAMS --connect $peer"
      done
      for subnet in $SUBNETS; do
        PARAMS="$PARAMS --subnet $subnet"
      done
      start-stop-daemon --start --pidfile /run/$NAME-$net.pid --make-pidfile --name $NAME --background --startas /bin/sh -- -c "exec $DAEMON $PARAMS >/var/log/vpncloud-$net.log 2>&1"
    fi
  done
  return 0
}

do_stop() {
  # Return
  #   0 if daemon has been stopped
  #   1 if daemon was already stopped
  #   2 if daemon could not be stopped
  #   other if a failure occurred
  for net in $NETWORKS; do
    start-stop-daemon --stop --quiet --pidfile /run/$NAME-$net.pid --name $NAME --retry 60
  done
  return 0
}

do_reload() {
  #
  # If the daemon can reload its configuration without
  # restarting (for example, when it is sent a SIGHUP),
  # then implement that here.
  #
  return 0
}

case "$1" in
  start)
    log_begin_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
      0|1) log_end_msg 0 ;;
      2) log_end_msg 1 ;;
    esac
  ;;
  stop)
    log_begin_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
      0|1) log_end_msg 0; exit 0 ;;
      2) log_end_msg 1; exit 2 ;;
    esac
    ;;
  status)
   do_status
   ;;
  #reload|force-reload)
    #
    # If do_reload() is not implemented then leave this commented out
    # and leave 'force-reload' as an alias for 'restart'.
    #
    #log_daemon_msg "Reloading $DESC" "$NAME"
    #do_reload
    #log_end_msg $?
    #;;
  restart|force-reload)
    #
    # If the "reload" option is implemented then remove the
    # 'force-reload' alias
    #
    log_begin_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
      0|1)
        do_start
        case "$?" in
          0) log_end_msg 0 ;;
          1) log_end_msg 1 ;; # Old process is still running
          *) log_end_msg 1 ;; # Failed to start
        esac
        ;;
      *)
        # Failed to stop
        log_end_msg 1
        ;;
    esac
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
    exit 3
    ;;
esac