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#!/bin/sh
#
# Copyright (c) 2007 Javier Fernandez-Sanguino <jfs@debian.org>
# Modified by Andrew Shadura <bugzilla@tut.by>
#
# This is free software; you may redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2,
# or (at your option) any later version.
#
# This 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 with
# the Debian operating system, in /usr/share/common-licenses/GPL; if
# not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA 02111-1307 USA
#
### BEGIN INIT INFO
# Provides: tayga
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: $remote_fs
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: userspace NAT64
# Description: TAYGA is a stateless NAT64 userspace daemon. Using the
# in-kernel TUN network driver, TAYGA receives IPv4 and
# IPv6 packets, translates them to the other protocol,
# and sends the translated packets back using the same
# TUN interface.
### END INIT INFO
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/tayga # Introduce the server's location here
NAME=tayga # Introduce the short server's name here
DESC="userspace NAT64" # Introduce a short description here
PIDFILE=/var/run/$NAME.pid
test -x "$DAEMON" || exit 0
. /lib/lsb/init-functions
# Default options, these can be overriden by the information
# at /etc/default/$NAME
DAEMON_OPTS="--nodetach" # Additional options given to the server
DIETIME=10 # Time to wait for the server to die, in seconds
# If this value is set too low you might not
# let some servers to die gracefully and
# 'restart' will not work
STARTTIME=2 # Time to wait for the server to start, in seconds
# If this value is set each time the server is
# started (on start or restart) the script will
# stall to try to determine if it is running
# If it is not set and the server takes time
# to setup a pid file the log message might
# be a false positive (says it did not start
# when it actually did)
TUN_DEVICE=$(sed -rn "/^[ \t]*tun-device/s/^[ \t]*tun-device[ \t]+//p" /etc/tayga.conf)
IPV6_PREFIX=$(sed -rn "/^[ \t]*prefix/s/^[ \t]*prefix[ \t]+//p" /etc/tayga.conf)
DYNAMIC_POOL=$(sed -rn "/^[ \t]*dynamic-pool/s/^[ \t]*dynamic-pool[ \t]+//p" /etc/tayga.conf)
CONFIGURE_IFACE="no"
CONFIGURE_NAT44="no"
# Include defaults if available
if [ -f "/etc/default/$NAME" ] ; then
. "/etc/default/$NAME"
fi
if [ "$RUN" != "yes" ] ; then
log_failure_msg "$NAME disabled, please adjust the configuration to your needs "
log_failure_msg "and then set RUN to 'yes' in /etc/default/$NAME to enable it."
exit 0
fi
set -e
running_pid() {
# Check if a given process pid's cmdline matches a given name
pid="$1"
name="$2"
[ -z "$pid" ] && return 1
[ ! -d "/proc/$pid" ] && return 1
return 0
}
running() {
# Check if the process is running looking at /proc
# (works for all users)
# No pidfile, probably no daemon present
[ ! -f "$PIDFILE" ] && return 1
pid=$(cat $PIDFILE)
running_pid "$pid" "$DAEMON" || return 1
return 0
}
start_server() {
if [ "$CONFIGURE_IFACE" = "yes" ] ; then
"$DAEMON" --mktun | logger -t "$NAME" -i
ip link set "$TUN_DEVICE" up
[ -n "$DYNAMIC_POOL" ] && ip route add "$DYNAMIC_POOL" dev "$TUN_DEVICE"
[ -n "$IPV6_PREFIX" ] && ip route add "$IPV6_PREFIX" dev "$TUN_DEVICE"
[ -n "$IPV4_TUN_ADDR" ] && ip addr add "$IPV4_TUN_ADDR" dev "$TUN_DEVICE"
[ -n "$IPV6_TUN_ADDR" ] && ip addr add "$IPV6_TUN_ADDR" dev "$TUN_DEVICE"
fi
[ "$CONFIGURE_NAT44" = "yes" ] && [ -n "$DYNAMIC_POOL" ] && iptables -t nat -A POSTROUTING -s "$DYNAMIC_POOL" -j MASQUERADE || true
start-stop-daemon --start --quiet \
-b --exec "$DAEMON" -- --pidfile "$PIDFILE" $DAEMON_OPTS
}
stop_server() {
start-stop-daemon --stop --quiet --pidfile "$PIDFILE"
errcode=$?
if [ "$CONFIGURE_IFACE" = "yes" ] ; then
ip link set "$TUN_DEVICE" down
"$DAEMON" --rmtun | logger -t "$NAME" -i
fi
[ "$CONFIGURE_NAT44" = "yes" ] && [ -n "$DYNAMIC_POOL" ] && iptables -t nat -D POSTROUTING -s "$DYNAMIC_POOL" -j MASQUERADE || true
rm -f "$PIDFILE"
return $errcode
}
force_stop() {
# Force the process to die killing it manually
[ ! -e "$PIDFILE" ] && return
if running ; then
kill -15 $pid
# Is it really dead?
sleep "$DIETIME"s
if running ; then
kill -9 $pid
sleep "$DIETIME"s
if running ; then
echo "Cannot kill $NAME (pid=$pid)!"
exit 1
fi
fi
fi
rm -f "$PIDFILE"
}
case "$1" in
start)
log_daemon_msg "Starting $DESC" "$NAME"
# Check if it's running first
if running ; then
log_progress_msg "apparently already running"
log_end_msg 0
exit 0
fi
if start_server ; then
# NOTE: Some servers might die some time after they start,
# this code will detect this issue if STARTTIME is set
# to a reasonable value
[ -n "$STARTTIME" ] && sleep $STARTTIME # Wait some time
if running ; then
# It's ok, the server started and is running
log_end_msg 0
else
# It is not running after we did start
log_end_msg 1
fi
else
# Either we could not start it
log_end_msg 1
fi
;;
stop)
log_daemon_msg "Stopping $DESC" "$NAME"
if running ; then
# Only stop the server if we see it running
errcode=0
stop_server || errcode=$?
log_end_msg $errcode
else
# If it's not running don't do anything
log_progress_msg "apparently not running"
log_end_msg 0
exit 0
fi
;;
force-stop)
# First try to stop gracefully the program
$0 stop
if running; then
# If it's still running try to kill it more forcefully
log_daemon_msg "Stopping (force) $DESC" "$NAME"
errcode=0
force_stop || errcode=$?
log_end_msg $errcode
fi
;;
restart|force-reload)
log_daemon_msg "Restarting $DESC" "$NAME"
errcode=0
stop_server || errcode=$?
# Wait some sensible amount, some server need this
[ -n "$DIETIME" ] && sleep $DIETIME
start_server || errcode=$?
[ -n "$STARTTIME" ] && sleep $STARTTIME
running || errcode=$?
log_end_msg $errcode
;;
status)
log_daemon_msg "Checking status of $DESC" "$NAME"
if running ; then
log_progress_msg "running"
log_end_msg 0
else
log_progress_msg "apparently not running"
log_end_msg 1
exit 1
fi
;;
# Use this if the daemon cannot reload
reload)
log_warning_msg "Reloading $NAME daemon: not implemented, as the daemon"
log_warning_msg "cannot re-read the config file (use restart)."
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|force-stop|restart|force-reload|status}" >&2
exit 1
;;
esac
exit 0
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