#
# Shorewall 4.4 -- /usr/share/shorewall/lib.cli-std.
#
#     This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
#     (c) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 - Tom Eastep (teastep@shorewall.net)
#
#	Complete documentation is available at http://shorewall.net
#
#	This program is free software; you can redistribute it and/or modify
#	it under the terms of Version 2 of the GNU General Public License
#	as published by the Free Software Foundation.
#
#	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.
#
#	You should have received a copy of the GNU General Public License
#	along with this program; if not, write to the Free Software
#	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# This library contains the command processing code common to /sbin/shorewall and /sbin/shorewall6.
#
####################################################################################################
# Set the configuration variables from the .conf file
#
#     $1 = Yes: read the params file
#     $2 = Yes: check for STARTUP_ENABLED
#     $3 = Yes: Check for LOGFILE
#
get_config() {
    local prog

    ensure_config_path

    if [ "$1" = Yes ]; then
	params=$(find_file params)

	if [ -f $params ]; then
	    . $params
	fi
    fi

    config=$(find_file $g_program.conf)

    if [ -f $config ]; then
	if [ -r $config ]; then
	    . $config
	else
	    echo "Cannot read $config! (Hint: Are you root?)" >&2
	    exit 1
	fi
    else
	echo "$config does not exist!" >&2
	exit 2
    fi

    ensure_config_path

    if [ -z "$g_export" -a "$(id -u)" = 0 ]; then
	#
	# This block is avoided for compile for export and when the user isn't root
	#
	if [ "$3" = Yes ]; then
	    if [ -n "$LOGFILE" ]; then
		if [ -n "$(syslog_circular_buffer)" ]; then
		    g_logread="logread | tac"
		elif [ -r $LOGFILE ]; then
		    g_logread="tac $LOGFILE"
		else
		    echo "LOGFILE ($LOGFILE) does not exist!" >&2
		    exit 2
		fi
	    fi
	fi

	if [ $g_family -eq 4 ]; then
	    if [ -n "$IPTABLES" ]; then
		if [ ! -x "$IPTABLES" ]; then
		    echo "   ERROR: The program specified in IPTABLES does not exist or is not executable" >&2
		    exit 2
		fi
	    else
		IPTABLES=$(mywhich iptables 2> /dev/null)
		if [ -z "$IPTABLES" ] ; then
		    echo "   ERROR: Can't find iptables executable" >&2
		    exit 2
		fi
	    fi
	    
	    g_tool=$IPTABLES
	else
	    if [ -n "$IP6TABLES" ]; then
		if [ ! -x "$IP6TABLES" ]; then
		    echo "   ERROR: The program specified in IP6TABLES does not exist or is not executable" >&2
		    exit 2
		fi
	    else
		IP6TABLES=$(mywhich ip6tables 2> /dev/null)
		if [ -z "$IP6TABLES" ] ; then
		    echo "   ERROR: Can't find ip6tables executable" >&2
		    exit 2
		fi
	    fi

	    g_tool=$IP6TABLES
	fi

	if [ -n "$IP" ]; then
	    case "$IP" in
		*/*)
		    if [ ! -x "$IP" ] ; then
			echo "   ERROR: The program specified in IP ($IP) does not exist or is not executable" >&2
			exit 2
		    fi
		    ;;
		*)
		    prog="$(mywhich $IP 2> /dev/null)"
		    if [ -z "$prog" ] ; then
			echo "   ERROR: Can't find $IP executable" >&2
			exit 2
		    fi
		    IP=$prog
		    ;;
	    esac
	else
	    IP='ip'
	fi

	if [ -n "$IPSET" ]; then
	    case "$IPSET" in
		*/*)
		    if [ ! -x "$IPSET" ] ; then
			echo "   ERROR: The program specified in IPSET ($IPSET) does not exist or is not executable" >&2
			exit 2
		    fi
		    ;;
		*)
		    prog="$(mywhich $IPSET 2> /dev/null)"
		    if [ -z "$prog" ] ; then
			echo "   ERROR: Can't find $IPSET executable" >&2
			exit 2
		    fi
		    IPSET=$prog
		    ;;
	    esac
	else
	    IPSET='ipset'
	fi

	if [ -n "$TC" ]; then
	    case "$TC" in
		*/*)
		    if [ ! -x "$TC" ] ; then
			echo "   ERROR: The program specified in TC ($TC) does not exist or is not executable" >&2
			exit 2
		    fi
		    ;;
		*)
		    prog="$(mywhich $TC 2> /dev/null)"
		    if [ -z "$prog" ] ; then
			echo "   ERROR: Can't find $TC executable" >&2
			exit 2
		    fi
		    TC=$prog
		    ;;
	    esac
	else
	    TC='tc'
	fi
	#
	# Compile by non-root needs no restore file
	#
	[ -n "$RESTOREFILE" ] || RESTOREFILE=restore

	validate_restorefile RESTOREFILE

	if [ "$2" = Yes ]; then
	    case $STARTUP_ENABLED in
		No|no|NO)
		    echo "   ERROR: $g_product startup is disabled. To enable startup, set STARTUP_ENABLED=Yes in ${CONFDIR}/${g_program}.conf" >&2
		    exit 2
		    ;;
		Yes|yes|YES)
		    ;;
		*)
		    if [ -n "$STARTUP_ENABLED" ]; then
			echo "   ERROR: Invalid Value for STARTUP_ENABLED: $STARTUP_ENABLED" >&2
			exit 2
		    fi
		    ;;
	    esac
	fi

	case ${SHOREWALL_COMPILER:=perl} in
	    perl|Perl)
		;;
	    shell|Shell)
		echo "   WARNING: SHOREWALL_COMPILER=shell ignored. Shorewall-shell support has been removed in this release" >&2
		;;
	    *)
		echo "   ERROR: Invalid value ($SHOREWALL_COMPILER) for SHOREWALL_COMPILER" >&2
		exit 2
		;;
	esac

	case ${TC_ENABLED:=Internal} in
	    No|NO|no)
	        TC_ENABLED=
		;;
	esac

	[ -z "$LOGFORMAT" ] && LOGFORMAT='Shorewall:%s.%s'

	[ -n "$LOGFORMAT" ] && LOGFORMAT="${LOGFORMAT%%%*}"

	if [ -n "$STARTUP_LOG" ]; then
	    if [ -n "$LOG_VERBOSITY" ]; then
		case $LOG_VERBOSITY in
		    -1)
			;;
		    0|1|2)
			;;
		    *)
		        echo "  ERROR: Invalid LOG_VERBOSITY ($LOG_VERBOSITY)" >&2
			exit 2;
			;;
		esac
	    else
		LOG_VERBOSITY=2;
	    fi
	else
	    LOG_VERBOSITY=-1;
	fi

    else
	STARTUP_LOG=
	LOG_VERBOSITY=-1
    fi

    if [ -n "$SHOREWALL_SHELL" ]; then
	if [ ! -x "$SHOREWALL_SHELL" ]; then
	    echo "   WARNING: The program specified in SHOREWALL_SHELL does not exist or is not executable; falling back to /bin/sh" >&2
	    SHOREWALL_SHELL=/bin/sh
	fi
    fi

    case $VERBOSITY in
	-1|0|1|2)
	    ;;
	*)
	    if [ -n "$VERBOSITY" ]; then
		echo "   ERROR: Invalid VERBOSITY setting ($VERBOSITY)" >&2
		exit 2
	    else
		VERBOSITY=2
	    fi
	    ;;
    esac

    [ -n "$g_use_verbosity" ] && VERBOSITY=$g_use_verbosity || VERBOSITY=$(($g_verbose_offset + $VERBOSITY))

    if [ $VERBOSITY -lt -1 ]; then
	VERBOSITY=-1
    elif [ $VERBOSITY -gt 2 ]; then
	VERBOSITY=2
    fi

    g_hostname=$(hostname 2> /dev/null)

    [ -n "$RSH_COMMAND" ] || RSH_COMMAND='ssh ${root}@${system} ${command}'
    [ -n "$RCP_COMMAND" ] || RCP_COMMAND='scp ${files} ${root}@${system}:${destination}'

    case $MANGLE_ENABLED in
	Yes|yes)
	    ;;
	No|no)
	    MANGLE_ENABLED=
	    ;;
	*)
	    if [ -n "$MANGLE_ENABLED" ]; then
		echo "   ERROR: Invalid MANGLE_ENABLED setting ($MANGLE_ENABLED)" >&2
		exit 2
	    fi
	    ;;
    esac

    case $AUTOMAKE in
	Yes|yes)
	    ;;
	No|no)
	    AUTOMAKE=
	    ;;
	*)
	    if [ -n "$AUTOMAKE" ]; then
		echo "   ERROR: Invalid AUTOMAKE setting ($AUTOMAKE)" >&2
		exit 1
	    fi
	    ;;
    esac

    case $LOAD_HELPERS_ONLY in
	Yes|yes)
	    ;;
	No|no)
	    LOAD_HELPERS_ONLY=
	    ;;
	*)
	    if [ -n "$LOAD_HELPERS_ONLY" ]; then
		echo "   ERROR: Invalid LOAD_HELPERS_ONLY setting ($LOAD_HELPERS_ONLY)" >&2
		exit 1
	    fi
	    ;;
    esac

    case $LEGACY_FASTSTART in
	Yes|yes)
	    ;;
	No|no)
	    LEGACY_FASTSTART=
	    ;;
	*)
	    if [ -n "$LEGACY_FASTSTART" ]; then
		echo "   ERROR: Invalid LEGACY_FASTSTART setting ($LEGACY_FASTSTART)" >&2
		exit 1
	    fi

	    LEGACY_FASTSTART=Yes
	    ;;
    esac
}

#
# Determine if there are config files newer than the passed object
#
uptodate() {
    [ -x $1 ] || return 1

    local dir
    local ifs

    ifs="$IFS"
    IFS=':'

    for dir in $CONFIG_PATH; do
	if [ -n "$(find ${dir} -newer $1)" ]; then
	    IFS="$ifs"
	    return 1;
	fi
    done

    IFS="$ifs"

    return 0
}

#
# Run the compiler
#
compiler() {
    local pc
    pc=$g_libexec/shorewall/compiler.pl

    if [ $(id -u) -ne 0 ]; then
	if [ -z "$g_shorewalldir" -o "$g_shorewalldir" = /etc/$g_program ]; then
	    startup_error "Ordinary users may not compile the /etc/$g_program configuration"
	fi
    fi
    #
    # We've now set g_shorewalldir so recalculate CONFIG_PATH
    #
    ensure_config_path
    #
    # Get the config from $g_shorewalldir
    #
    [ -n "$g_shorewalldir" -a "$g_shorewalldir" != /etc/$g_program ] && get_config

    case $COMMAND in
	*start|try|refresh)
	    ;;
	*)
	    STARTUP_LOG=
	    LOG_VERBOSITY=-1
	    ;;
    esac

    debugflags="-w"
    [ -n "$g_debug" ]   && debugflags='-wd'
    [ -n "$g_profile" ] && debugflags='-wd:DProf'

    # Perl compiler only takes the output file as a argument

    [ "$1" = debug -o "$1" = trace ]  && shift;
    [ "$1" = nolock ] && shift;
    shift

    options="--verbose=$VERBOSITY --family=$g_family --config_path=$CONFIG_PATH"
    [ -n "$STARTUP_LOG" ] && options="$options --log=$STARTUP_LOG"
    [ -n "$LOG_VERBOSITY" ] && options="$options --log_verbosity=$LOG_VERBOSITY";
    [ -n "$g_export" ] && options="$options --export"
    [ -n "$g_shorewalldir" ] && options="$options --directory=$g_shorewalldir"
    [ -n "$g_timestamp" ] && options="$options --timestamp"
    [ -n "$g_test" ] && options="$options --test"
    [ -n "$g_preview" ] && options="$options --preview"
    [ "$g_debugging" = trace ] && options="$options --debug"
    [ -n "$g_refreshchains" ] && options="$options --refresh=$g_refreshchains"
    [ -n "$g_confess" ] && options="$options --confess"
    [ -n "$g_update" ] && options="$options --update"
    [ -n "$g_convert" ] && options="$options --convert"
    [ -n "$g_annotate" ] && options="$options --annotate"

    if [ -n "$PERL" ]; then
	if [ ! -x "$PERL" ]; then
	    echo "   WARNING: The program specified in the PERL option does not exist or is not executable; falling back to /usr/bin/perl" >&2
	    PERL=/usr/bin/perl
	fi
    else
	PERL=/usr/bin/perl
    fi

    if [ $g_perllib = ${g_libexec}/shorewall ]; then
	$PERL $debugflags $pc $options $@
    else
	PERL5LIB=$g_perllib
	export PERL5LIB
	$PERL $debugflags $pc $options $@
    fi
}

#
# Start Command Executor
#
start_command() {
    local finished
    finished=0
    local object
    local rc
    rc=0

    do_it() {
	if [ -n "$AUTOMAKE" ]; then
	    [ -n "$nolock" ] || mutex_on
	    run_it ${VARDIR}/firewall $g_debugging start
	    rc=$?
	    [ -n "$nolock" ] || mutex_off
	else
	    progress_message3 "Compiling..."

	    if compiler $g_debugging $nolock compile ${VARDIR}/.start; then
		[ -n "$nolock" ] || mutex_on
		run_it ${VARDIR}/.start $g_debugging start
		rc=$?
		[ -n "$nolock" ] || mutex_off
	    else
		rc=$?
		logger -p kern.err "ERROR:$g_product start failed"
	    fi
	fi

	exit $rc
    }

    if product_is_started; then
	error_message "Shorewall is already running"
	exit 0
    fi

    [ -n "$STARTUP_ENABLED" ] || fatal_error "Startup is disabled"

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			d*)
			    g_debug=Yes
			    option=${option#d}
			    ;;
			f*)
			    g_fast=Yes
			    option=${option#f}
			    ;;
			p*)
			    [ -n "$(which conntrack)" ] || fatal_error "The '-p' option requires the conntrack utility which does not appear to be installed on this system"
			    g_purge=Yes
			    option=${option%p}
			    ;;
			c*)
			    AUTOMAKE=
			    option=${option#c}
			    ;;			    
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    ;;
	1)
	    [ -n "$g_shorewalldir" -o -n "$g_fast" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    AUTOMAKE=
	    ;;
	*)
	    usage 1
	    ;;
    esac

    if [ -n "${g_fast}${AUTOMAKE}" ]; then
	if [ -z "$g_fast" -o -z "$LEGACY_FASTSTART" ]; then
	    #
	    # Automake or LEGACY_FASTSTART=No -- use the last compiled script
	    #
	    object=firewall
	else
	    #
	    # 'start -f' with LEGACY_FASTSTART=Yes -- use last saved configuration
	    #
	    object=$RESTOREFILE
	fi

	if ! uptodate ${VARDIR}/$object; then
	    g_fast=
	    AUTOMAKE=
	fi

	if [ -n "$g_fast" -a $object = $RESTOREFILE ]; then
	    g_restorepath=${VARDIR}/$object
	    [ -n "$nolock" ] || mutex_on
	    echo Restoring Shorewall...
	    run_it $g_restorepath restore
	    rc=$?
	    [ -n "$nolock" ] || mutex_off
	    [ $rc -eq 0 ] && progress_message3 "$g_product restored from $g_restorepath"
	    exit $rc
	else
	    do_it
	fi
    else
	do_it
    fi
}

#
# Compile Command Executor
#
compile_command() {
    local finished
    finished=0

    while [ $finished -eq 0 ]; do
	[ $# -eq 0 ] && break
	option=$1
	case $option in
	    -*)
		shift
		option=${option#-}

		[ -z "$option" ] && usage 1

		while [ -n "$option" ]; do
		    case $option in
			e*)
			    g_export=Yes
			    option=${option#e}
			    ;;
			p*)
			    g_profile=Yes
			    option=${option#p}
			    ;;
			t*)
			    g_test=Yes
			    option=${option#t}
			    ;;
			d*)
			    g_debug=Yes;
			    option=${option#d}
			    ;;
			T*)
			    g_confess=Yes
			    option=${option#T}
			    ;;
			-)
			    finished=1
			    option=
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		;;
	    *)
		finished=1
		;;
	esac
    done

    file=

    case $# in
	0)
	    file=${VARDIR}/firewall
	    ;;
	1)
	    file=$1
	    [ -d $file ] && echo "   ERROR: $file is a directory" >&2 && exit 2;
	    ;;
	2)
	    [ -n "$g_shorewalldir" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    file=$2
	    ;;
	*)
	    usage 1
	    ;;
    esac

    [ "x$file" = x- ] || progress_message3 "Compiling..."

    compiler $g_debugging compile $file
}

#
# Check Command Executor
#
check_command() {
    local finished
    finished=0

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			e*)
			    g_export=Yes
			    option=${option#e}
			    ;;
			p*)
			    g_profile=Yes
			    option=${option#p}
			    ;;
			d*)
			    g_debug=Yes;
			    option=${option#d}
			    ;;
			r*)
			    g_preview=Yes
			    option=${option#r}
			    ;;
			T*)
			    g_confess=Yes
			    option=${option#T}
			    ;;
			a*)
			    g_annotate=Yes
			    option=${option#a}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    ;;
	1)
	    [ -n "$g_shorewalldir" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    ;;
	*)
	    usage 1
	    ;;
    esac

    progress_message3 "Checking..."

    compiler $g_debugging $nolock check
}

#
# Update Command Executor
#
update_command() {
    local finished
    finished=0

    g_update=Yes

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			e*)
			    g_export=Yes
			    option=${option#e}
			    ;;
			p*)
			    g_profile=Yes
			    option=${option#p}
			    ;;
			d*)
			    g_debug=Yes;
			    option=${option#d}
			    ;;
			r*)
			    g_preview=Yes
			    option=${option#r}
			    ;;
			T*)
			    g_confess=Yes
			    option=${option#T}
			    ;;
			a*)
			    g_annotate=Yes
			    option=${option#a}
			    ;;
			b*)
			    g_convert=Yes
			    option=${option#b}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    ;;
	1)
	    [ -n "$g_shorewalldir" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    ;;
	*)
	    usage 1
	    ;;
    esac

    progress_message3 "Updating..."

    compiler $g_debugging $nolock check
}

#
# Restart Command Executor
#
restart_command() {
    local finished
    finished=0
    local rc
    rc=0
    local restorefile

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			d*)
			    g_debug=Yes
			    option=${option#d}
			    ;;
			f*)
			    g_fast=Yes
			    option=${option#f}
			    ;;
			c*)
			    AUTOMAKE=
			    option=${option#c}
			    ;;			    
			n*)
			    g_noroutes=Yes
			    option=${option#n}
			    ;;
			p*)
			    [ -n "$(which conntrack)" ] || fatal_error "The '-p' option requires the conntrack utility which does not appear to be installed on this system"
			    g_purge=Yes
			    option=${option%p}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    ;;
	1)
	    [ -n "$g_shorewalldir" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    [ -n "$g_fast" ] && fatal_error "Directory may not be specified with the -f option"
	    AUTOMAKE=
	    ;;
	*)
	    usage 1
	    ;;
    esac

    [ -n "$STARTUP_ENABLED" ] || fatal_error "Startup is disabled"

    if [ -z "$g_fast" -a -n "$AUTOMAKE" ]; then
	uptodate ${VARDIR}/firewall && g_fast=Yes
    fi

    if [ -z "$g_fast" ]; then
	progress_message3 "Compiling..."

	if compiler $g_debugging $nolock compile ${VARDIR}/.restart; then
	    [ -n "$nolock" ] || mutex_on
	    run_it ${VARDIR}/.restart $g_debugging restart
	    rc=$?
	    [ -n "$nolock" ] || mutex_off
	else
	    rc=$?
	    logger -p kern.err "ERROR:$g_product restart failed"
	fi
    else
	[ -x ${VARDIR}/firewall ] || fatal_error "No ${VARDIR}/firewall file found"
	[ -n "$nolock" ] || mutex_on
	run_it ${VARDIR}/firewall $g_debugging restart
	rc=$?
	[ -n "$nolock" ] || mutex_off
    fi

    return $rc
}

#
# Refresh Command Executor
#
refresh_command() {
    local finished
    finished=0

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    if [ $# -gt 0 ]; then
	g_refreshchains=$1
	shift

	while [ $# -gt 0 ]; do
	    g_refreshchains="$g_refreshchains,$1"
	    shift
	done
    else
	g_refreshchains=:refresh:
    fi

    product_is_started || fatal_error "$g_product is not running"

    [ -n "$STARTUP_ENABLED" ] || fatal_error "Startup is disabled"

    progress_message3 "Compiling..."

    if compiler $g_debugging $nolock compile ${VARDIR}/.refresh; then
	[ -n "$nolock" ] || mutex_on
	run_it ${VARDIR}/.refresh $g_debugging refresh
	rc=$?
	[ -n "$nolock" ] || mutex_off
    else
	rc=$?
    fi

    return $rc
}

#
# Safe-start/safe-restart Command Executor
#
safe_commands() {
    local finished
    finished=0
    local command
    local timeout
    timeout=60

    # test is the shell supports timed read
    read -t 0 junk 2> /dev/null
    if [ $? -eq 2 -a ! -x /bin/bash ];then
	echo "Your shell does not support a feature required to execute this command".
	exit 2
    fi

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			n*)
			    g_noroutes=Yes
			    option=${option#n}
			    ;;
			t)
			    [ $# -eq 1 ] && fatal_error "The -t option requires a timeout value"
			    echo $2 | egrep -q '[[:digit:]]+[smh]' || fatal_error "The timeout value must be numeric, optionally followed by a suffix (s, m or h)"
			    timeout=$2
			    option=
			    shift;
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    ;;
	1)
	    [ -n "$g_shorewalldir" ] && usage 2

	    if [ ! -d $1 ]; then
		if [ -e $1 ]; then
		    echo "$1 is not a directory" >&2 && exit 2
		else
		    echo "Directory $1 does not exist" >&2 && exit 2
		fi
	    fi

	    g_shorewalldir=$(resolve_file $1)
	    ;;
	*)
	    usage 1
	    ;;
    esac

    [ -n "$STARTUP_ENABLED" ] || fatal_error "Startup is disabled"

    if product_is_started; then
	running=Yes
    else
	running=
    fi

    if [ "$COMMAND" = "safe-start" -a  -n "$running" ]; then
	# the command is safe-start but the firewall is already running
	error_message "Shorewall is already started"
	exit 0
    fi

    if [ "$COMMAND" = "safe-start" -o -z "$running" ]; then
	# the command is safe-start or shorewall[6] is not started yet
	command="start"
    else
	# the command is safe-restart and the firewall is already running
	command="restart"
    fi

    progress_message3 "Compiling..."

    if ! compiler $g_debugging nolock compile ${VARDIR}/.$command; then
	status=$?
	exit $status
    fi

    case $command in
	start)
	    RESTOREFILE=NONE
	    progress_message3 "Starting..."
	    ;;
	restart)
	    RESTOREFILE=.safe
	    g_restorepath=${VARDIR}/.safe
	    save_config
	    progress_message3 "Restarting..."
	    ;;
    esac

    [ -n "$nolock" ] || mutex_on

    if run_it ${VARDIR}/.$command $g_debugging $command; then

	echo -n "Do you want to accept the new firewall configuration? [y/n] "

	if read_yesno_with_timeout $timeout ; then
	    echo "New configuration has been accepted"
	else
	    if [ "$command" = "restart" ]; then
		run_it ${VARDIR}/.safe restore
	    else
		run_it ${VARDIR}/.$command clear
	    fi

	    [ -n "$nolock" ] || mutex_off

	    echo "New configuration has been rejected and the old one restored"
	    exit 2
	fi

    fi

    [ -n "$nolock" ] || mutex_off
}

#
# 'try' Command Executor
#
try_command() {
    local finished
    finished=0
    local timeout
    timeout=

    handle_directory() {
	[ -n "$g_shorewalldir" ] && usage 2

	if [ ! -d $1 ]; then
	    if [ -e $1 ]; then
		echo "$1 is not a directory" >&2 && exit 2
	    else
		echo "Directory $1 does not exist" >&2 && exit 2
	    fi
	fi

	g_shorewalldir=$(resolve_file $1)
    }

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			n*)
			    g_noroutes=Yes
			    option=${option#n}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	0)
	    usage 1
	    ;;
	1)
	    handle_directory $1
	    ;;
	2)
	    handle_directory $1
	    echo $2 | egrep -q '[[:digit:]]+[smh]' || fatal_error "The timeout value must be numeric, optionally followed by a suffix (s, m or h)"
	    timeout=$2
	    ;;
	*)
	    usage 1
	    ;;
    esac

    [ -n "$STARTUP_ENABLED" ] || fatal_error "Startup is disabled"

    if product_is_started; then
	running=Yes
    else
	running=
    fi

    if [ -z "$running" ]; then
	# shorewall[6] is not started yet
	command="start"
    else
	# the firewall is already running
	command="restart"
    fi

    progress_message3 "Compiling..."

    if ! compiler $g_debugging $nolock compile ${VARDIR}/.$command; then
	status=$?
	exit $status
    fi

    case $command in
	start)
	    RESTOREFILE=NONE
	    progress_message3 "Starting..."
	    ;;
	restart)
	    RESTOREFILE=.try
	    g_restorepath=${VARDIR}/.try
	    save_config
	    progress_message3 "Restarting..."
	    ;;
    esac

    [ -n "$nolock" ] || mutex_on

    if run_it ${VARDIR}/.$command $command && [ -n "$timeout" ]; then
	sleep $timeout

	if [ "$command" = "restart" ]; then
	    run_it ${VARDIR}/.try restore
	else
	    run_it ${VARDIR}/.$command clear
	fi
    fi

    [ -n "$nolock" ] || mutex_off

    return 0
}

rsh_command() {
    command="$*"

    eval $RSH_COMMAND
}

rcp_command() {
    files="$1"
    destination=$2

    eval $RCP_COMMAND
}

#
# [Re]load command executor
#
reload_command() # $* = original arguments less the command.
{
    local verbose
    verbose=$(make_verbose)
    local file
    file=
    local capabilities
    capabilities=
    local finished
    finished=0
    local saveit
    saveit=
    local result
    local directory
    local system
    local getcaps
    getcaps=
    local root
    root=root
    local libexec
    libexec=/usr/share

    litedir=/var/lib/${g_program}-lite

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			s*)
			    saveit=Yes
			    option=${option#s}
			    ;;
			c*)
			    getcaps=Yes
			    option=${option#c}
			    ;;
			r)
			    [ $# -gt 1 ] || fatal_error "Missing Root User name"
			    root=$2
			    option=
			    shift
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	1)
	    directory="."
	    system=$1
	    ;;
	2)
	    directory=$1
	    system=$2
	    ;;
	*)
	    usage 1
	    ;;
    esac

    temp=$(rsh_command /sbin/${g_program}-lite show config 2> /dev/null | grep ^LITEDIR | sed 's/LITEDIR is //')

    [ -n "$temp" ] && litedir="$temp"

    temp=$(rsh_command /sbin/${g_program}-lite show config 2> /dev/null | grep ^LIBEXEC | sed 's/LIBEXEC is //')

    if [ -n "$temp" ]; then
	case $temp in
	    /*)
		libexec="$temp"
		;;
	    *)
		libexec=/usr/$temp
		;;
	esac
    fi

    if [ -z "$getcaps" ]; then
	g_shorewalldir=$(resolve_file $directory)
	ensure_config_path
	capabilities=$(find_file capabilities)
	[ -f $capabilities ] || getcaps=Yes
    fi

    if [ -f $directory/${g_program}.conf ]; then
	if [ -f $directory/params ]; then
	    . $directory/params
	fi

	. $directory/$g_program.conf
	
	ensure_config_path
    fi

    if [ -n "$getcaps" ]; then
	[ -n "$DONT_LOAD" ] && DONT_LOAD="$(echo $DONT_LOAD | tr ',' ' ')"

	progress_message "Getting Capabilities on system $system..."
	if [ $g_family -eq 4 ]; then
	    if ! rsh_command "MODULESDIR=$MODULESDIR MODULE_SUFFIX=\"$MODULE_SUFFIX\" IPTABLES=$IPTABLES DONT_LOAD=\"$DONT_LOAD\" $libexec/shorewall-lite/shorecap" > $directory/capabilities; then
	        fatal_error "Capturing capabilities on system $system failed"
	    fi
	elif ! rsh_command "MODULESDIR=$MODULESDIR MODULE_SUFFIX=\"$MODULE_SUFFIX\" IP6TABLES=$IP6TABLES DONT_LOAD=\"$DONT_LOAD\" $libexec/shorewall6-lite/shorecap" > $directory/capabilities; then
	    fatal_error "Capturing capabilities on system $system failed"
	fi
    fi

    file=$(resolve_file $directory/firewall)

    [ -n "$g_timestamp" ] && timestamp='-t' || timestamp=

    if $g_program $g_debugging $verbose $timestamp compile -e $directory $directory/firewall && \
	progress_message3 "Copying $file and ${file}.conf to ${system}:${litedir}..." && \
	rcp_command "$directory/firewall $directory/firewall.conf" ${litedir}
    then
	save=$(find_file save);

	[ -f $save ] && progress_message3 "Copying $save to ${system}:/etc/${g_program}-lite/" && rcp_command $save /etc/shorewall-lite/

	progress_message3 "Copy complete"
	if [ $COMMAND = reload ]; then
	    rsh_command "/sbin/${g_program}-lite $g_debugging $verbose $timestamp restart" && \
	    progress_message3 "System $system reloaded" || saveit=
	else
	    rsh_command "/sbin/${g_program}-lite $g_debugging $verbose $timestamp start" && \
	    progress_message3 "System $system loaded" || saveit=
	fi

	if [ -n "$saveit" ]; then
	    rsh_command "/sbin/${g_program}-lite $g_debugging $verbose $timestamp save" && \
	    progress_message3 "Configuration on system $system saved"
	fi
    fi
}

#
# Export command executor
#
export_command() # $* = original arguments less the command.
{
    local verbose
    verbose=$(make_verbose)
    local file
    file=
    local finished
    finished=0
    local directory
    local target

    while [ $finished -eq 0 -a $# -gt 0 ]; do
	option=$1
	case $option in
	    -*)
		option=${option#-}

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			*)
			    fatal_error "Unrecognized option \"$option\""
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
	1)
	    directory="."
	    target=$1
	    ;;
	2)
	    directory=$1
	    target=$2
	    ;;
	*)
	    fatal_error "Invalid command syntax (\"man $g_program\" for help)"
	    ;;
    esac

    case $target in
	*:*)
	    ;;
	*)
	    target=$target:
	    ;;
    esac

    file=$(resolve_file $directory/firewall)

    if $g_program $g_debugging $verbose compile -e $directory $directory/firewall && \
	echo "Copying $file and ${file}.conf to ${target#*@}..." && \
	scp $directory/firewall $directory/firewall.conf $target
    then
	save=$(find_file save);

	[ -f $save ] && progress_message3 "Copying $save to ${target#*}..." && rcp_command $save $target

	progress_message3 "Copy complete"
    fi
}

#
# Give Usage Information
#
usage() # $1 = exit status
{
    echo "Usage: $(basename $0) [debug|trace] [nolock] [ -q ] [ -v[-1|{0-2}] ] [ -t ] <command>"
    echo "where <command> is one of:"
    echo "   add <interface>[:<host-list>] ... <zone>"
    echo "   allow <address> ..."
    echo "   check [ -e ] [ -r ] [ -p ] [ -r ] [ -T ] [ <directory> ]"
    echo "   clear"
    echo "   compile [ -e ] [ -d ] [ <directory name> ] [ <path name> ]"
    echo "   delete <interface>[:<host-list>] ... <zone>"
    echo "   disable <interface>"
    echo "   drop <address> ..."
    echo "   dump [ -x ]"
    echo "   enable <interface>"
    echo "   export [ <directory1> ] [<user>@]<system>[:<directory2>]"
    echo "   forget [ <file name> ]"
    echo "   help"

    if [ $g_family -eq 4 ]; then
	echo "   hits [ -t ]"
	echo "   ipcalc { <address>/<vlsm> | <address> <netmask> }"
	echo "   ipdecimal { <address> | <integer> }"
	echo "   iprange <address>-<address>"
    fi

    echo "   iptrace <iptables match expression>"
    echo "   load [ -s ] [ -c ] [ -r <root user> ] [ <directory> ] <system>"
    echo "   logdrop <address> ..."
    echo "   logreject <address> ..."
    echo "   logwatch [<refresh interval>]"

    if [ $g_family -eq 4 ]; then
	echo "   noiptrace <iptables match expression>"
    else
	echo "   noiptrace <ip6tables match expression>"
    fi

    echo "   refresh [ <chain>... ]"
    echo "   reject <address> ..."
    echo "   reload [ -s ] [ -c ] [ -r <root user> ] [ <directory> ] <system>"
    echo "   reset [ <chain> ... ]"
    echo "   restart [ -n ] [ -p ] [-d] [ -f ] [ -c ][ <directory> ]"
    echo "   restore [ -n ] [ <file name> ]"
    echo "   safe-restart [ -t <timeout> ] [ <directory> ]"
    echo "   safe-start [ -t <timeout> ] [ <directory> ]"
    echo "   save [ <file name> ]"
    echo "   show [ -x ] [ -t {filter|mangle|nat|raw|rawpost} ] [ {chain [<chain> [ <chain> ... ]"
    echo "   show actions"
    echo "   show [ -f ] capabilities"
    echo "   show classifiers"
    echo "   show config"
    echo "   show connections"
    echo "   show dynamic <zone>"
    echo "   show filters"
    echo "   show ip"
    
    if [ $g_family -eq 4 ]; then
	echo "   show ipa"
    fi

    echo "   show [ -m ] log [<regex>]"
    echo "   show macro <macro>"
    echo "   show macros"
    echo "   show marks"
    echo "   show [ -x ] mangle|nat|raw|rawpost|routing"
    echo "   show policies"
    echo "   show tc [ device ]"
    echo "   show vardir"
    echo "   show zones"
    echo "   start [ -f ] [ -n ] [ -p ] [ -c ] [ <directory> ]"
    echo "   status"
    echo "   stop"
    echo "   try <directory> [ <timeout> ]"
    echo "   update [ -b ] [ -r ] [ -T ] [ <directory> ]"
    echo "   version [ -a ]"
    echo
    exit $1
}

compiler_command() {

    case $COMMAND in
	compile)
	    get_config Yes
	    shift
	    compile_command $@
	    ;;
	refresh)
	    get_config Yes Yes
	    shift
	    refresh_command $@
	    ;;
	check)
	    get_config Yes
	    shift
	    check_command $@
	    ;;
	update)
	    get_config Yes
	    shift
	    update_command $@
	    ;;
	load|reload)
	    get_config Yes
	    shift
	    reload_command $@
	    ;;
	export)
	    get_config Yes
	    shift
	    export_command $@
	    ;;
	try)
	    get_config Yes
	    shift
	    try_command $@
	    ;;
	safe-restart|safe-start)
	    get_config Yes
	    shift
	    safe_commands $@
	    ;;
	*)
	    usage 1
	    ;;
    esac

}