#!/bin/sh
# Pluto control daemon
# Copyright (C) 1998, 1999, 2001  Henry Spencer.
# 
# 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 2 of the License, or (at your
# option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
# 
# 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.
#
# RCSID $Id: _plutorun.in,v 1.9 2005/10/16 13:28:15 as Exp $

me='ipsec _plutorun'		# for messages

info=/var/run/ipsec.info

popts=
stderrlog=
plutorestartoncrash=true

wherelog=daemon.error
pidfile=/var/run/pluto.pid
verb="Starting"
for dummy
do
	case "$1" in
	--re)	verb="Restarting"	;;
	--plutorestartoncrash) plutorestartoncrash="$2"; shift ;;
	--debug)	plutodebug="$2" ; shift	;;
	--uniqueids)	uniqueids="$2" ; shift	;;
	--nat_traversal)    nat_traversal="$2" ; shift  ;;
	--keep_alive)   keep_alive="$2" ; shift ;;
	--force_keepalive)   force_keepalive="$2" ; shift ;;
	--disable_port_floating)    disable_port_floating="$2" ; shift  ;;
	--virtual_private)  virtual_private="$2" ; shift ;; 	
	--nocrsend)	nocrsend="$2" ; shift	;;
	--strictcrlpolicy)	strictcrlpolicy="$2" ; shift ;;
	--crlcheckinterval)	crlcheckinterval="$2"; shift ;;
	--cachecrls)		cachecrls="$2" ; shift	;;
	--pkcs11module)		pkcs11module="$2"; shift ;;
	--pkcs11keepstate)	pkcs11keepstate="$2"; shift ;;
	--pkcs11proxy)		pkcs11proxy="$2"; shift	;;
	--dump)	dumpdir="$2" ; shift	;;
	--opts)	popts="$2" ; shift	;;
	--stderrlog) stderrlog="$2" ; shift	;;
	--wait)	plutowait="$2" ; shift	;;
	--pre)	prepluto="$2" ; shift	;;
	--post)	postpluto="$2" ; shift	;;
	--log)	wherelog="$2" ; shift	;;
	--pid)	pidfile="$2" ; shift	;;
	--)	shift ; break	;;
	-*)	echo "$me: unknown option \`$1'" >&2 ; exit 2	;;
	*)	break	;;
	esac
	shift
done

# initially we are in the foreground, with parent looking after logging

# precautions
if test -f $pidfile
then
	echo "pluto appears to be running already (\`$pidfile' exists), will not start another"
	exit 1
fi
if test ! -e /dev/urandom
then
	echo "cannot start Pluto, system lacks \`/dev/urandom'!?!"
	exit 1
fi

# sort out options
for d in $plutodebug
do
	popts="$popts --debug-$d"
done
case "$uniqueids" in
yes)	popts="$popts --uniqueids"	;;
no|'')				;;
*)	echo "unknown uniqueids value (not yes/no) \`$IPSECuniqueids'"	;;
esac
case "$nocrsend" in
yes)  popts="$popts --nocrsend"       ;;
no|'')                                ;;
*)    echo "unknown nocrsend value (not yes/no) \`$IPSECnocrsend'"    ;;
esac
case "$strictcrlpolicy" in
yes)  popts="$popts --strictcrlpolicy"        ;;
no|'')                                ;;
*)    echo "unknown strictcrlpolicy value (not yes/no) \`$IPSECstrictcrlpolicy'"      ;;
esac
case "$cachecrls" in
yes)  popts="$popts --cachecrls"        ;;
no|'')                                ;;
*)    echo "unknown cachecrls value (not yes/no) \`$IPSECcachecrls'"      ;;
esac
case "$nat_traversal" in
yes)  popts="$popts --nat_traversal"  ;;
no|'')                ;;
*)    echo "unknown nat_traversal value (not yes/no) \`$IPSECnat_traversal'" ;;
esac
[ -n "$keep_alive" ] && popts="$popts --keep_alive $keep_alive"
case "$force_keepalive" in
yes)  popts="$popts --force_keepalive"  ;;
no|'')                ;;
*)    echo "unknown force_keepalive value (not yes/no) \`$IPSECforce_keepalive'" ;;
esac
case "$disable_port_floating" in
yes)  popts="$popts --disable_port_floating"  ;;
no|'')                ;;
*)    echo "unknown disable_port_floating (not yes/no) \`$disable_port_floating'" ;;
esac
case "$pkcs11keepstate" in
yes)  popts="$popts --pkcs11keepstate" ;;
no|'')                ;;
*)    echo "unknown pkcs11keepstate value (not yes/no) \`$IPSECpkcs11keepstate'" ;;
esac
case "$pkcs11proxy" in
yes)  popts="$popts --pkcs11proxy" ;;
no|'')                ;;
*)    echo "unknown pkcs11proxy value (not yes/no) \`$IPSECpkcs11proxy'" ;;
esac

[ -n "$virtual_private" ] && popts="$popts --virtual_private $virtual_private"

# add crl check interval
if test ${crlcheckinterval:-0} -gt 0
then
	popts="$popts --crlcheckinterval $crlcheckinterval"
fi

if test -n "$pkcs11module"
then
	popts="$popts --pkcs11module $pkcs11module"
fi

if test -n "$stderrlog"
then
	popts="$popts --stderrlog 2>>$stderrlog"

	if test -f $stderrlog
	then
		if test ! -w $stderrlog
		then
			echo Cannot write to \"$stderrlog\".
			exit 1
		fi
	else
		if test ! -w "`dirname $stderrlog`"
		then
			echo Cannot write to directory to create \"$stderrlog\".
			exit 1
		fi
	fi

	echo "Plutorun started on "`date` >$stderrlog
fi

# set up dump directory
if test " $dumpdir" = " "
then
	ulimit -c 0			# preclude core dumps
elif test ! -d "$dumpdir"
then
	echo "dumpdir \`$dumpdir' does not exist, ignored"
	ulimit -c 0			# preclude core dumps
elif cd $dumpdir			# put them where desired
then
	ulimit -c unlimited		# permit them
else
	echo "cannot cd to dumpdir \`$dumpdir', ignored"
	ulimit -c 0			# preclude them
fi

# execute any preliminaries
if test " $prepluto" != " "
then
	$prepluto
	st=$?
	if test " $st" -ne 0
	then
		echo "...prepluto command exited with status $st"
	fi
fi

IPSEC_SECRETS=${IPSEC_CONFS}/ipsec.secrets
if test ! -f "${IPSEC_SECRETS}"
then
    ( logger -p authpriv.info -t ipsec__plutorun No file ${IPSEC_SECRETS}, generating key.
      ipsec scepclient --out pkcs1 --out cert-self --quiet
      echo -e "# /etc/ipsec.secrets - strongSwan IPsec secrets file\n" > ${IPSEC_SECRETS}
      chmod 600 ${IPSEC_SECRETS}
      echo ": RSA myKey.der" >> ${IPSEC_SECRETS}

      # tell pluto to go re-read the file
      ipsec auto --rereadsecrets
    ) &
fi

# 
# make sure that the isakmp port is open!
#
if test -f /etc/sysconfig/ipchains
then
    if egrep -q 500:500 /etc/sysconfig/ipchains
    then
	:
    else
	ipchains -I input 1 -p udp -s 0.0.0.0/0.0.0.0 -d 0.0.0.0/0.0.0.0 500:500 -j ACCEPT
	# if it redhat, then save the rules again.
	if [ -f /etc/redhat-release ]
	then
	    sh /etc/rc.d/init.d/ipchains save
	fi
    fi
fi

# spin off into the background, with our own logging
echo "$verb Pluto subsystem..." | logger -p authpriv.error -t ipsec__plutorun
execdir=${IPSEC_EXECDIR-@IPSEC_EXECDIR@}
libdir=${IPSEC_LIBDIR-@IPSEC_LIBDIR@}
until (
	if test -s $info
	then
		. $info
		export defaultroutephys defaultroutevirt defaultrouteaddr defaultroutenexthop
	fi
	# eval allows $popts to contain redirection and other magic
	eval $execdir/pluto --nofork --secretsfile "$IPSEC_SECRETS" --policygroupsdir "${IPSEC_CONFS}/ipsec.d/policies" $popts
	status=$?
	echo "exit"
	echo $status
	) | $libdir/_plutoload --wait "$plutowait" --post "$postpluto"
do
	status=$?
	case "$status" in
	13)	echo "internal failure in pluto scripts, impossible to carry on"
		exit 1
		;;
	10)	echo "pluto apparently already running (?!?), giving up"
		exit 1
		;;
	137)	echo "pluto killed by SIGKILL, terminating without restart or unlock"
		exit 0
		;;
	143)	echo "pluto killed by SIGTERM, terminating without restart"
		# pluto now does its own unlock for this
		exit 0
		;;
	*)	st=$status
	        if $plutorestartoncrash
		then
		    :
		else
		    exit 0
		fi

		if test $st -gt 128
		then
			st="$st (signal `expr $st - 128`)"
		fi
		echo "!pluto failure!:  exited with error status $st"
		echo "restarting IPsec after pause..."
		(
			sleep 10
			ipsec setup _autorestart
		) </dev/null >/dev/null 2>&1 &
		exit 1
		###sleep 10
		###rm -rf $pidfile
		#### and go around the loop again
		;;
	esac
done </dev/null 2>&1 |
	logger -s -p $wherelog -t ipsec__plutorun >/dev/null 2>/dev/null &

exit 0