#! /bin/sh
#
# tripe init script
#   suitable for direct use in most SysV-style inits

set -e

# --- Setup ---

[ -f @initconfig@ ] && . @initconfig@
: ${prefix=@prefix@} ${exec_prefix=@exec_prefix@}
: ${bindir=@bindir@} ${sbindir=@sbindir@}
: ${TRIPEDIR=@configdir@}
: ${tripe=$sbindir/tripe} ${tripectl=$bindir/tripectl}
PATH=/usr/bin:/usr/sbin:/bin:/sbin:$bindir
export PATH TRIPEDIR

# --- Check it will work, or at least stands a fighting chance ---
#
# Having loads of different tunnel types doesn't help any.

test -x $tripe -a -x $tripectl || exit 0

case `$tripe --tunnel` in
  linux)
    case `uname -s` in
      Linux)
	if { test -f /proc/misc && grep -q net/tun /proc/misc; } ||
	   modprobe -q tun; then
	  : good
	else
	  echo >&2 "$tripe needs the Linux TUN/TAP driver to run."
	  exit 1
	fi
	if test -c /dev/net/tun; then
	  : good
	else
	  echo >&2 "$tripe needs /dev/net/tun, which is missing."
	  exit 1
	fi
	;;
      *)
	echo >&2 "CONFIGURATION ERROR"
	echo >&2 "  $tripe is compiled to use a Linux tunnel device, but"
	echo >&2 "  this system is `uname -s`"
	exit 1
	;;
    esac
    ;;
  unet)
    case `uname -s` in
      Linux)
	if { test -f /proc/devices && grep -q unet /proc/devices; } ||
	   modprobe -q unet; then
	  : good
	else
	  echo >&2 "$tripe needs the Linux UNET driver to run."
	  exit 1
	fi
	if test -c /dev/unet; then
	  : good
	else
	  echo >&2 "$tripe needs /dev/unet, which is missing."
	  exit 1
	fi
	;;
      *)
	echo >&2 "CONFIGURATION ERROR"
	echo >&2 "  $tripe is compiled to use a Linux tunnel device, but"
	echo >&2 "  this system is `uname -s`"
	exit 1
	;;
    esac
    ;;
  bsd)
    case `uname -s` in
      *BSD)
	# Don't know how to check the device is working.
	if test -c /dev/tun0; then
	  : good
	else
	  echo >&2 "$tripe needs /dev/tun0, which is missing."
	  exit 1
	fi
	;;
      *)
	echo >&2 "CONFIGURATION ERROR"
	echo >&2 "  $tripe is compiled to use a BSD tunnel device, but"
	echo >&2 "  this system is `uname -s`"
	exit 1
	;;
    esac
    ;;
esac
  
# --- Do what was wanted ---

case "$1" in
  start)
    echo -n "Starting TrIPE VPN daemon:"
    if $tripectl help >/dev/null 2>/dev/null; then
      echo " already running"
      exit 0
    fi
    $tripectl -D -s -p$tripe \
      -f${logfile-@logfile@} \
      -P${pidfile-@pidfile@} \
      ${keytag+-S-t}$keytag \
      ${addr+-S-b}$addr \
      ${port+-S-p}${port} \
      ${user+-S-u}${user} \
      ${group+-S-g}${group} \
      ${trace+-S-T}${trace} \
      ${miscopts}
    for i in 1 2 3 4 give-up; do
      $tripectl help >/dev/null 2>/dev/null && break
      sleep 1
    done
    if [ $i = give-up ]; then
      echo " wouldn't start"
      exit 1
    fi
    echo -n " tripe"
    for i in $TRIPEDIR/peers/*; do
      [ -x $i ] || continue
      name=`basename $i`
      case $name in *~|\#*) continue;; esac
      if $i; then 
	echo -n " $name"
      else
        echo -n " ($name failed)"
      fi
    done
    echo " done"
    ;;
  stop)
    echo -n "Stopping TrIPE VPN daemon:"
    $tripectl quit
    echo " done"
    ;;
  status)
    for i in `$tripectl list`; do
      echo "Peer \`$i':"
      $tripectl stats $i | sed 's/^/  /'
    done
    ;;
  restart | force-reload)
    sh $0 stop
    sh $0 start
    ;;
  *)
    echo >&2 "usage: $0 start|stop|restart|status|force-reload"
    exit 1
    ;;
esac