shorewall_code/Shorewall/lib.cli

#!/bin/sh
#
# Shorewall 4.4 -- /usr/share/shorewall/lib.cli.
#
#     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 - 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/shorewall-lite.
#

#
# Fatal Error
#
fatal_error() # $@ = Message
{
    echo "   $@" >&2
    exit 2
}

#
# Display a chain if it exists
#

showfirstchain() # $1 = name of chain
{
    awk \
    'BEGIN	 {prnt=0; rslt=1; }; \
    /^$/	 { next; };\
    /^Chain/	 {if ( prnt == 1 ) { rslt=0; exit 0; }; };\
    /Chain '$1'/ { prnt=1; }; \
		 { if (prnt == 1)  print; };\
    END		 { exit rslt; }' $TMPFILE
}

showchain() # $1 = name of chain
{
    if [ "$firstchain" = "Yes" ]; then
	if showfirstchain $1; then
	    firstchain=
	fi
    else
	awk \
	'BEGIN	     {prnt=0;};\
	/^$|^ pkts/  { next; };\
	/^Chain/     {if ( prnt == 1 ) exit; };\
	/Chain '$1'/ { prnt=1; };\
		     { if (prnt == 1)  print; }' $TMPFILE
    fi
}

#
# The 'awk' hack that compensates for bugs in iptables-save (or rather in the extension modules).
#

iptablesbug()
{
    if qt mywhich awk ; then
	awk 'BEGIN           { sline=""; };\
             /^-j/           { print sline $0; next };\
             /-m policy.*-j/ { print $0; next };\
             /-m policy/     { sline=$0; next };\
             /--mask ff/     { sub( /--mask ff/, "--mask 0xff" ) };\
                             { print ; sline="" }'
    else
	echo "   WARNING: You don't have 'awk' on this system so the output of the save command may be unusable" >&2
	cat
    fi
}

#
# Validate the value of RESTOREFILE
#
validate_restorefile() # $* = label
{
    case $RESTOREFILE in
	*/*)
	    error_message "ERROR: $@ must specify a simple file name: $RESTOREFILE"
	    exit 2
	    ;;
	.safe|.try)
	    ;;
	.*|NONE)
	    error_message "ERROR: Reserved File Name: $RESTOREFILE"
	    exit 2
	    ;;
    esac
}

#
# Clear descriptor 1 if it is a terminal
#
clear_term() {
    [ -t 1 ] && clear
}

#
# Delay $timeout seconds -- if we're running on a recent bash2 then allow
# <enter> to terminate the delay
#
timed_read ()
{
    read -t $timeout foo 2> /dev/null

    test $? -eq 2 && sleep $timeout
}

#
# Determine if 'syslog -C' is running
#
syslog_circular_buffer() {
    local pid
    local tty
    local flags
    local cputime
    local path
    local args
    local arg

    ps ax 2> /dev/null | while read pid tty flags cputime path args; do
	case $path in
	    syslogd|*/syslogd)
		for arg in $args; do
		    if [ x$arg = x-C ]; then
			echo Yes
			return
		    fi
		done
		;;
	esac
    done
}

#
# Display the last $1 packets logged
#
packet_log() # $1 = number of messages
{
    if [ -n "$g_showmacs" -o $VERBOSITY -gt 2 ]; then
	$g_logread | grep 'IN=.* OUT=.*SRC=.*\..*DST=' | head -n$1 | tac | sed 's/ kernel://; s/\[.*\] //' | sed s/" $host $LOGFORMAT"/" "/
    else
	$g_logread | grep 'IN=.* OUT=.*SRC=.*\..*DST=' |  head -n$1 | tac | sed 's/ kernel://; s/MAC=.* SRC=/SRC=/; s/\[.*\] '// | sed s/" $host $LOGFORMAT"/" "/
    fi
}

search_log() # $1 = IP address to search for
{
    if [ -n "$g_showmacs" -o $VERBOSITY -gt 2 ]; then
	$g_logread | grep 'IN=.* OUT=.*SRC=.*\..*DST=' | grep "$1" | tac | sed 's/ kernel://; s/\[.*\] //' | sed s/" $host $LOGFORMAT"/" "/
    else
	$g_logread | grep 'IN=.* OUT=.*SRC=.*\..*DST=' |  grep "$1" | tac | sed 's/ kernel://; s/MAC=.* SRC=/SRC=/; s/\[.*\] '// | sed s/" $host $LOGFORMAT"/" "/
    fi
}

#
# Show traffic control information
#
show_tc() {

    show_one_tc() {
	local device
	device=${1%@*}
	qdisc=$(tc qdisc list dev $device)

	if [ -n "$qdisc" ]; then
	    echo Device $device:
	    tc -s -d qdisc show dev $device
	    echo
	    tc -s -d class show dev $device
	    echo
	fi
    }

    if [ $# -gt 0 ]; then
	show_one_tc $1
    else
	ip -o link list | while read inx interface details; do
	    show_one_tc ${interface%:}
	done
    fi

}

#
# Show classifier information
#
show_classifiers() {

    show_one_classifier() {
	local device
	device=${1%@*}
	qdisc=$(tc qdisc list dev $device)

	if [ -n "$qdisc" ]; then
	    echo Device $device:
	    tc -s filter ls dev $device
	    echo
	fi
    }

    ip -o link list | while read inx interface details; do
	show_one_classifier ${interface%:}
    done

}

#
# Watch the Firewall Log
#
logwatch() # $1 = timeout -- if negative, prompt each time that
	   #		     an 'interesting' packet count changes
{
    if [ -z "$LOGFILE" ]; then
	LOGFILE=/var/log/messages

	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

    host=$(echo $g_hostname | sed 's/\..*$//')
    oldrejects=$($IPTABLES -L -v -n | grep 'LOG')

    if [ $1 -lt 0 ]; then
	timeout=$((- $1))
	pause="Yes"
    else
	pause="No"
	timeout=$1
    fi

    qt mywhich awk && haveawk=Yes || haveawk=

    while true; do
	clear_term
	echo "$banner $(date)"
	echo

	echo "Dropped/Rejected Packet Log ($LOGFILE)"
	echo

	show_reset

	rejects=$($IPTABLES -L -v -n | grep 'LOG')

	if [ "$rejects" != "$oldrejects" ]; then
	    oldrejects="$rejects"

	    $g_ring_bell

	    packet_log 40

	    if [ "$pause" = "Yes" ]; then
		echo
		echo $g_echo_n 'Enter any character to continue: '
		read foo
	    else
		timed_read
	    fi
	else
	    echo
	    packet_log 40
	    timed_read
	fi
    done
}

#
# Save currently running configuration
#
do_save() {
    local status
    status=0

    if [ -f ${VARDIR}/firewall ]; then
	if $iptables_save | iptablesbug > ${VARDIR}/restore-$$; then
	    cp -f ${VARDIR}/firewall $g_restorepath
	    mv -f ${VARDIR}/restore-$$ ${g_restorepath}-iptables
	    chmod +x $g_restorepath
	    echo "   Currently-running Configuration Saved to $g_restorepath"
	    run_user_exit save
	else
	    rm -f ${VARDIR}/restore-$$
	    echo "   ERROR: Currently-running Configuration Not Saved" >&2
	    status=1
	fi
    else
	echo "   ERROR: ${VARDIR}/firewall does not exist" >&2
	status=1
    fi

    case ${SAVE_IPSETS:=No} in
	[Yy]es)
	    case ${IPSET:=ipset} in
		*/*)
		    if [ ! -x "$IPSET" ]; then
			error_message "ERROR: IPSET=$IPSET does not exist or is not executable - ipsets are not saved"
			IPSET=
		    fi
		    ;;
		*)
		    IPSET="$(mywhich $IPSET)"
		    [ -n "$IPSET" ] || error_message "ERROR: The ipset utility cannot be located - ipsets are not saved"
		    ;;
	    esac

	    if [ -n "$IPSET" ]; then
		if [ -f /etc/debian_version ] && [ $(cat /etc/debian_version) = 5.0.3 ]; then
                    #
                    # The 'grep -v' is a hack for a bug in ipset's nethash implementation when xtables-addons is applied to Lenny
                    #
		    hack='| grep -v /31'
		else
		    hack=
		fi

		if eval $IPSET -S $hack > ${VARDIR}/ipsets.tmp; then
                    #
                    # Don't save an 'empty' file
                    #
		    grep -q '^-N' ${VARDIR}/ipsets.tmp && mv -f ${VARDIR}/ipsets.tmp ${g_restorepath}-ipsets
		fi
	    fi
	    ;;
	[Nn]o)
	    ;;
	*)
	    error_message "WARNING: Invalid value ($SAVE_IPSETS) for SAVE_IPSETS"
	    ;;
    esac

    return $status
}

save_config() {

    local result
    result=1

    iptables_save=${IPTABLES}-save

    [ -x $iptables_save ] || echo "$iptables-save does not exist or is not executable" >&2

    if shorewall_is_started ; then
	[ -d ${VARDIR} ] || mkdir -p ${VARDIR}

	if [ -f $g_restorepath -a ! -x $g_restorepath ]; then
	    echo "   ERROR: $g_restorepath exists and is not a saved $g_product configuration" >&2
	else
	    case $RESTOREFILE in
		capabilities|chains|default_route|firewall|firewall.conf|nat|proxyarp|restarted|rt_tables|save|state|undo_routing|zones)
		    echo "   ERROR: Reserved file name: $RESTOREFILE" >&2
		    ;;
		*)
		    validate_restorefile RESTOREFILE
		    do_save && rm -f ${VARDIR}/save
		    ;;
	    esac
	fi
    else
	echo "Shorewall isn't started" >&2
    fi

    return 0

}

#
# Show routing configuration
#
show_routing() {
    if [ -n "$(ip rule list)" ]; then
	heading "Routing Rules"
	ip rule list
	ip rule list | while read rule; do
	    echo ${rule##* }
	done | sort -u | while read table; do
	    heading "Table $table:"
	    ip route list table $table
	done
    else
	heading "Routing Table"
	ip route list
    fi
}

#
# 'list dynamic' command executor
#
find_sets() {
    local junk
    local setname

    ipset -L -n | grep "^Name: ${1}_" | while read junk setname; do echo $setname; done
}

list_zone() {

    local sets
    local setname

    [ -n "$(mywhich ipset)" ] || fatal_error "The ipset utility cannot be located"

    sets=$(find_sets $1)

    for setname in $sets; do
	echo "${setname#${1}_}:"
	ipset -L $setname -n | awk 'BEGIN        {prnt=0;}; \
                                    /^Members:/  {prnt=1; next; }; \
                                    /^Bindings:/ {prnt=0; }; \
                                                 { if (prnt == 1) print "   ", $1; };'
    done
}

#
# Show Filter - For Shorewall-lite, if there was an scfilter file at compile-time,
#               then the compiler generated another version of this function and
#               embedded it in the firewall.conf file. That version supersedes this
#               one.
#
show_connections_filter() {
    local filter
    local command
    local first

    command=${SHOREWALL_SHELL}

    filter=$(find_file scfilter)

    if [ -f $filter ]; then
	first=$(head -n1 $filter)

	case $first in
	    \#!*)
		command=${first#\#!}
		;;
	esac

	$command $filter
    else
	cat -
    fi
}

#
# Show Command Executor
#
show_command() {
    local finished
    finished=0
    local table
    table=filter
    local table_given
    table_given=

    show_macro() {
	foo=`grep 'This macro' $macro | sed 's/This macro //'`
	if [ -n "$foo" ]; then
	    macro=${macro#*.}
	    foo=${foo%.*}
	    if [ ${#macro} -gt 10 ]; then
		echo "   $macro  ${foo#\#}"
	    else
		$g_echo_e "   $macro  \t${foo#\#}"
	    fi
	fi
    }

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

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			v*)
			    VERBOSITY=$(($VERBOSITY + 1 ))
			    option=${option#v}
			    ;;
			x*)
			    g_ipt_options="-xnv"
			    option=${option#x}
			    ;;
			m*)
			    g_showmacs=Yes
			    option=${option#m}
			    ;;
			f*)
			    g_filemode=Yes
			    option=${option#f}
			    ;;
			t)
			    [ $# -eq 1 ] && usage 1

			    case $2 in
				mangle|nat|filter|raw)
				    table=$2
				    table_given=Yes
				    ;;
				*)
				    fatal_error "Invalid table name ($s)"
				    ;;
			    esac

			    option=
			    shift
			    ;;
			l*)
			    g_ipt_options1="--line-numbers"
			    option=${option#l}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    g_ipt_options="$g_ipt_options $g_ipt_options1"


    [ -n "$g_debugging" ] && set -x
    case "$1" in
	connections)
	    [ $# -gt 1 ] && usage 1

	    if [ -d /proc/sys/net/netfilter/ ]; then
		local count
		local max
		count=$(cat /proc/sys/net/netfilter/nf_conntrack_count)
		max=$(cat /proc/sys/net/netfilter/nf_conntrack_max)
		echo "$g_product $SHOREWALL_VERSION Connections ($count out of $max) at $g_hostname - $(date)"
	    else
		echo "$g_product $SHOREWALL_VERSION Connections at $g_hostname - $(date)"
	    fi

	    echo

	    if qt mywhich conntrack ; then
		conntrack -f ipv4 -L | show_connections_filter
	    else
		if [ -f /proc/net/ip_conntrack ]; then
		    cat /proc/net/ip_conntrack | show_connections_filter
		else
		    grep -v '^ipv6' /proc/net/nf_conntrack | show_connections_filter
		fi
	    fi
	    ;;
	nat)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION NAT Table at $g_hostname - $(date)"
	    echo
	    show_reset
	    $IPTABLES -t nat -L $g_ipt_options
	    ;;
	raw)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION RAW Table at $g_hostname - $(date)"
	    echo
	    show_reset
	    $IPTABLES -t raw -L $g_ipt_options
	    ;;
	tos|mangle)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION Mangle Table at $g_hostname - $(date)"
	    echo
	    show_reset
	    $IPTABLES -t mangle -L $g_ipt_options
	    ;;
	log)
	    [ $# -gt 2 ] && usage 1

	    if [ -z "$LOGFILE" ]; then
		LOGFILE=/var/log/messages

		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

	    echo "$g_product $SHOREWALL_VERSION Log ($LOGFILE) at $g_hostname - $(date)"
	    echo
	    show_reset
	    host=$(echo $g_hostname | sed 's/\..*$//')

	    if [ $# -eq 2 ]; then
		search_log $2
	    else
		packet_log 20
	    fi
	    ;;
	tc)
	    [ $# -gt 2 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION Traffic Control at $g_hostname - $(date)"
	    echo
	    shift
	    show_tc $1
	    ;;
	classifiers|filters)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION Classifiers at $g_hostname - $(date)"
	    echo
	    show_classifiers
	    ;;
	zones)
	    [ $# -gt 1 ] && usage 1
	    if [ -f ${VARDIR}/zones ]; then
		echo "$g_product $SHOREWALL_VERSION Zones at $g_hostname - $(date)"
		echo
		while read zone type hosts; do
		    echo "$zone ($type)"
		    for host in $hosts; do
			case $host in
			    exclude)
				echo "  exclude:"
				;;
			    *)
				echo "   $host"
				;;
			esac
		    done
		done < ${VARDIR}/zones
		echo
	    else
		echo "   ERROR: ${VARDIR}/zones does not exist" >&2
		exit 1
	    fi
	    ;;
	capabilities)
	    [ $# -gt 1 ] && usage 1
	    determine_capabilities
	    VERBOSITY=2
	    if [ -n "$g_filemode" ]; then
		report_capabilities1
	    else
		report_capabilities
	    fi
	    ;;
	ip)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION IP at $g_hostname - $(date)"
	    echo
	    ip -4 addr list
	    ;;
	routing)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION Routing at $g_hostname - $(date)"
	    echo
	    show_routing
	    ;;
	config)
	    . ${SHAREDIR}/configpath
	    if [ -n "$g_filemode" ]; then
		echo "CONFIG_PATH=$CONFIG_PATH"
		echo "VARDIR=$VARDIR"
		echo "LIBEXEC=$g_libexec"
		[ -n "$LITEDIR" ] && echo "LITEDIR=$LITEDIR"
	    else
		echo "Default CONFIG_PATH is $CONFIG_PATH"
		echo "Default VARDIR is $VARDIR"
		echo "LIBEXEC is $g_libexec"
		[ -n "$LITEDIR" ] && echo "LITEDIR is $LITEDIR"
	    fi
	    ;;
	chain)
	    shift
	    echo "$g_product $SHOREWALL_VERSION $([ $# -gt 1 ] && echo "Chains " || [ $# -gt 0 ] && echo "Chain " || echo $table Table)$* at $g_hostname - $(date)"
	    echo
	    show_reset
	    if [ $# -gt 0 ]; then
		for chain in $*; do
		    $IPTABLES -t $table -L $chain $g_ipt_options
		    echo
		done
	    else
		$IPTABLES -t $table -L $g_ipt_options
	    fi
	    ;;
	vardir)
	    echo $VARDIR;
	    ;;
	policies)
	    [ $# -gt 1 ] && usage 1
	    echo "$g_product $SHOREWALL_VERSION Policies at $g_hostname - $(date)"
	    echo
	    [ -f ${VARDIR}/policies ] && cat ${VARDIR}/policies;
	    ;;
	ipa)
	    echo "$g_product $SHOREWALL_VERSION per-IP Accounting at $g_hostname - $(date)"
	    echo
	    [ $# -gt 1 ] && usage 1
	    perip_accounting
	    ;;
	*)
	    if [ "$g_product" = Shorewall ]; then
		case $1 in
		    actions)
			[ $# -gt 1 ] && usage 1
			echo "allowBcast          # Silently Allow Broadcast/multicast"
			echo "allowInvalid        # Accept packets that are in the INVALID conntrack state."
			echo "allowinUPnP         # Allow UPnP inbound (to firewall) traffic"
			echo "allowoutUPnP        # Allow traffic from local command 'upnpd' (does not work with kernels after 2.6.13)"
			echo "dropBcast           # Silently Drop Broadcast/multicast"
			echo "dropInvalid         # Silently Drop packets that are in the INVALID conntrack state"
			echo "dropNotSyn          # Silently Drop Non-syn TCP packets"
			echo "drop1918src         # Drop packets with an RFC 1918 source address"
			echo "drop1918dst         # Drop packets with an RFC 1918 original dest address"
			echo "forwardUPnP         # Allow traffic that upnpd has redirected from"
			echo "rejNotSyn           # Silently Reject Non-syn TCP packets"
			echo "rej1918src          # Reject packets with an RFC 1918 source address"
			echo "rej1918dst          # Reject packets with an RFC 1918 original dest address"

			if [ -f ${CONFDIR}/actions ]; then
			    cat ${SHAREDIR}/actions.std ${CONFDIR}/actions | grep -Ev '^\#|^$'
			else
			    grep -Ev '^\#|^$' ${SHAREDIR}/actions.std
			fi

			return
			;;
		    macro)
			[ $# -ne 2 ] && usage 1
			for directory in $(split $CONFIG_PATH); do
			    if [ -f ${directory}/macro.$2 ]; then
				echo "Shorewall $SHOREWALL_VERSION Macro $2 at $g_hostname - $(date)"
				cat ${directory}/macro.$2
				return
			    fi
			done
			echo "   WARNING: Macro $2 not found" >&2
			return
			;;
		    macros)
			[ $# -gt 1 ] && usage 1

			for directory in $(split $CONFIG_PATH); do
			    temp=
			    for macro in ${directory}/macro.*; do
				case $macro in
				    *\*)
                                        ;;
				    *)
				        if [ -z "$temp" ]; then
					    echo
					    echo "Macros in $directory:"
					    echo
					    temp=Yes
					fi
					show_macro
					;;
				esac
			    done
			done
			return
			;;
		esac
	    fi


	    if [ $# -gt 0 ]; then
		if [ $1 = dynamic -a $# -gt 1 ]; then
		    shift
		    [ $# -eq 1 ] || usage 1
		    list_zone $1
		    return;
                fi

		[ -n "$table_given" ] || for chain in $*; do
		    if ! qt $IPTABLES -t $table -L $chain $g_ipt_options; then
			error_message "ERROR: Chain '$chain' is not recognized by $IPTABLES."
			exit 1
		    fi
		done

		echo "$g_product $SHOREWALL_VERSION $([ $# -gt 1 ] && echo "Chains " || echo "Chain ")$* at $g_hostname - $(date)"
		echo
		show_reset
		for chain in $*; do
		    $IPTABLES -t $table -L $chain $g_ipt_options
		    echo
		done
	    else
		echo "$g_product $SHOREWALL_VERSION $table Table at $g_hostname - $(date)"
		echo
		show_reset
		$IPTABLES -t $table -L $g_ipt_options
	    fi
	    ;;
    esac
}

perip_accounting() {
    if qt mywhich iptaccount; then
	local hnames
	local hname

	hnames=$(iptaccount -a | grep '^Found table:' | cut -d ' ' -f 3)

	if [ -n "$hnames" ]; then
	    for hname in $hnames; do
		iptaccount -l $hname | egrep '^IP:|^Show' 
		echo
	    done
	else
	    echo "   No IP Accounting Tables Defined"
	    echo 
	fi
    else
	echo "   iptaccount is not installed"
    fi
}

#
# Dump Filter - For Shorewall-lite, if there was a dumpfilter file at compile-time,
#               then the compiler generated another version of this function and
#               embedded it in the firewall.conf file. That version supersedes this
#               one.
#
dump_filter() {
    local filter
    local command
    local first

    command=${SHOREWALL_SHELL}

    filter=$(find_file dumpfilter)

    if [ -f $filter ]; then
	first=$(head -n1 $filter)

	case $first in
	    \#!*)
		command=${first#\#!}
		;;
	esac

	$command $filter
    else
	cat -
    fi
}

#
# Dump Command Executor
#
do_dump_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 $option in
			-)
			    finished=1
			    option=
			    ;;
			x*)
			    g_ipt_options="-xnv"
			    option=${option#x}
			    ;;
			m*)
			    g_showmacs=Yes
			    option=${option#m}
			    ;;
			l*)
			    g_ipt_options1="--line-numbers"
			    option=${option#l}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    if [ -z "$LOGFILE" ]; then
	LOGFILE=/var/log/messages

	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

    g_ipt_options="$g_ipt_options $g_ipt_options1"

    [ $VERBOSITY -lt 2 ] && VERBOSITY=2

    [ -n "$g_debugging" ] && set -x
    [ $# -eq 0 ] || usage 1
    clear_term
    echo "$g_product $SHOREWALL_VERSION Dump at $g_hostname - $(date)"
    echo

    show_reset
    host=$(echo $g_hostname | sed 's/\..*$//')
    $IPTABLES -L $g_ipt_options

    heading "Log ($LOGFILE)"
    packet_log 20

    if qt $IPTABLES -t nat -L -n; then
	heading "NAT Table"
	$IPTABLES -t nat -L $g_ipt_options
    fi

    if qt $IPTABLES -t mangle -L -n; then
	heading "Mangle Table"
	$IPTABLES -t mangle -L $g_ipt_options
    fi

    if qt $IPTABLES -t raw -L -n; then
	heading "Raw Table"
	$IPTABLES -t raw -L $g_ipt_options
    fi

    local count=$(cat /proc/sys/net/netfilter/nf_conntrack_count)
    local max=$(cat /proc/sys/net/netfilter/nf_conntrack_max)

    heading "Conntrack Table ($count out of $max)"
    [ -f /proc/net/ip_conntrack ] && cat /proc/net/ip_conntrack || grep -v '^ipv6' /proc/net/nf_conntrack

    heading "IP Configuration"
    ip -4 addr list

    heading "IP Stats"
    ip -stat link list

    if qt mywhich brctl; then
	heading "Bridges"
	brctl show
    fi

    heading "Per-IP Counters"

    perip_accounting

    if qt mywhich setkey; then
	heading "PFKEY SPD"
	setkey -DP
	heading "PFKEY SAD"
	setkey -D | grep -Ev '^[[:space:]](A:|E:)'  # Don't divulge the keys
    fi

    heading "/proc"
    show_proc /proc/version
    show_proc /proc/sys/net/ipv4/ip_forward
    show_proc /proc/sys/net/ipv4/icmp_echo_ignore_all

    for directory in /proc/sys/net/ipv4/conf/*; do
	for file in proxy_arp arp_filter arp_ignore rp_filter log_martians; do
	    show_proc $directory/$file
	done
    done

    show_routing

    heading "ARP"
    arp -na

    if qt mywhich lsmod; then
	heading "Modules"
	lsmod | grep -E '^(ip_|ipt_|iptable_|nf_|xt_)' | sort
    fi

    determine_capabilities
    echo
    report_capabilities

    echo
    netstat -tunap

    if [ -n "$TC_ENABLED" ]; then
	heading "Traffic Control"
	show_tc
	heading "TC Filters"
	show_classifiers
	fi
}

dump_command() {
    do_dump_command | dump_filter
}

#
# Restore Comand Executor
#
restore_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 $option in
			-)
			    finished=1
			    option=
			    ;;
			n*)
			    g_noroutes=Yes
			    option=${option#n}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    case $# in
    0)
	;;
    1)
	RESTOREFILE="$1"
	validate_restorefile '<restore file>'
	;;
    *)
	usage 1
	;;
    esac

    if [ -z "$STARTUP_ENABLED" ]; then
	error_message "ERROR: Startup is disabled"
	exit 2
    fi

    g_restorepath=${VARDIR}/$RESTOREFILE

    [ -n "$nolock" ] || mutex_on

    if [ -x $g_restorepath ]; then
	progress_message3 "Restoring Shorewall..."

	run_it $g_restorepath restore && progress_message3 "$g_product restored from ${VARDIR}/$RESTOREFILE"

	[ -n "$nolock" ] || mutex_off
    else
	echo "File $g_restorepath: file not found"
	[ -n "$nolock" ] || mutex_off
	exit 2
    fi
}

#
# Display the time that the counters were last reset
#
show_reset() {
    [ -f ${VARDIR}/restarted ] && \
	echo "Counters reset $(cat ${VARDIR}/restarted)" && \
	echo
}

#
# Display's the passed file name followed by "=" and the file's contents.
#
show_proc() # $1 = name of a file
{
    [ -f $1 ] && echo "   $1 = $(cat $1)"
}

read_yesno_with_timeout() {
    read -t 60 yn 2> /dev/null
    if [ $? -eq 2 ]
    then
	# read doesn't support timeout
	test -x /bin/bash || return 2 # bash is not installed so the feature is not available
	/bin/bash -c 'read -t 60 yn ; if [ "$yn" == "y" ] ; then exit 0 ; else exit 1 ; fi' # invoke bash and use its version of read
	return $?
    else
	# read supports timeout
	case "$yn" in
	    y|Y)
		return 0
		;;
	    *)
		return 1
		;;
	esac
    fi
}

#
# Print a heading with leading and trailing black lines
#
heading() {
    echo
    echo "$@"
    echo
}

#
# Create the appropriate -q option to pass onward
#
make_verbose() {
    local v
    v=$g_verbose_offset
    local option
    option=-

    if [ -n "$g_use_verbosity" ]; then
	echo "-v$g_use_verbosity"
    elif [ $g_verbose_offset -gt 0 ]; then
	while [ $v -gt 0 ]; do
	    option="${option}v"
	    v=$(($v - 1))
	done

	echo $option
    elif [ $g_verbose_offset -lt 0 ]; then
	while [ $v -lt 0 ]; do
	    option="${option}q"
	    v=$(($v + 1))
	done

	echo $option
    fi
}

#
# Executor for drop,reject,... commands
#
block() # $1 = command, $2 = Finished, $3 - $n addresses
{
    local chain
    chain=$1
    local finished
    finished=$2
    local which
    which='-s'
    local range
    range='--src-range'

    if ! chain_exists dynamic; then
	echo "Dynamic blacklisting is not enabled in the current $g_product configuration" >&2
	[ -n "$nolock" ] || mutex_off
	exit 2
    fi

    shift 3

    while [ $# -gt 0 ]; do
	case $1 in
	    from)
		which='-s'
		range='--src-range'
		shift
		continue
		;;
	    to)
		which='-d'
		range='--dst-range'
		shift
		continue
		;;
	    *-*)
		qt $IPTABLES -D dynamic -m iprange $range $1 -j reject
		qt $IPTABLES -D dynamic -m iprange $range  $1 -j DROP
		qt $IPTABLES -D dynamic -m iprange $range $1 -j logreject
		qt $IPTABLES -D dynamic -m iprange $range $1 -j logdrop
		$IPTABLES -A dynamic -m iprange $range $1 -j $chain || break 1
		;;
	    *)
		qt $IPTABLES -D dynamic $which $1 -j reject
		qt $IPTABLES -D dynamic $which $1 -j DROP
		qt $IPTABLES -D dynamic $which $1 -j logreject
		qt $IPTABLES -D dynamic $which $1 -j logdrop
		$IPTABLES -A dynamic $which $1 -j $chain || break 1
		;;
	esac

	echo "$1 $finished"
	shift
    done
}

#
# Replace commas with spaces and echo the result
#
separate_list() {
    local list
    list="$@"
    local part
    local newlist
    local firstpart
    local lastpart
    local enclosure

    case "$list" in
	*,|,*|*,,*|*[[:space:]]*)
	    #
	    # There's been whining about us not catching embedded white space in
	    # comma-separated lists. This is an attempt to snag some of the cases.
	    #
            echo "WARNING -- invalid comma-separated list \"$@\"" >&2
	    ;;
	*\[*\]*)
	    #
	    # Where we need to embed comma-separated lists within lists, we enclose them
	    # within square brackets.
	    #
	    firstpart=${list%%\[*}
	    lastpart=${list#*\[}
	    enclosure=${lastpart%%\]*}
	    lastpart=${lastpart#*\]}
	    case $lastpart in
		\,*)
		    case $firstpart in
			*\,)
			    echo "$(separate_list ${firstpart%,}) [$enclosure] $(separate_list ${lastpart#,})"
			    ;;
			*)
			    echo "$(separate_list $firstpart)[$enclosure] $(separate_list ${lastpart#,})"
			    ;;
		    esac
		    ;;
		*)
		    case $firstpart in
			*\,)
			    echo "$(separate_list ${firstpart%,}) [$enclosure]$(separate_list $lastpart)"
			    ;;
			*)
			    echo "$(separate_list $firstpart)[$enclosure]$(separate_list $lastpart)"
			    ;;
		    esac
		    ;;
	    esac
	    return
	    ;;
    esac

    list="$@"
    part="${list%%,*}"
    newlist="$part"

    while [ "x$part" != "x$list" ]; do
	list="${list#*,}";
	part="${list%%,*}";
	newlist="$newlist $part";
    done

    echo "$newlist"
}

#
# add command executor
#
add_command() {
    local interface host hostlist zone ipset
    if ! shorewall_is_started ; then
	echo "Shorewall Not Started" >&2
	exit 2
    fi

    case "$IPSET" in
	*/*)
	    ;;
	*)
	    [ -n "$(mywhich $IPSET)" ] || fatal_error "The $IPSET utility cannot be located"
	    ;;
    esac
    #
    # Normalize host list
    #
    while [ $# -gt 1 ]; do
	interface=${1%%:*}
	host=${1#*:}
	[ "$host" = "$1" ] && host=

	if [ -z "$host" ]; then
	    hostlist="$hostlist $interface:0.0.0.0/0"
	else
	    for h in $(separate_list $host); do
		hostlist="$hostlist $interface:$h"
	    done
	fi

	shift
    done

    zone=$1

    for host in $hostlist; do
	interface=${host%:*}

	ipset=${zone}_${interface};

	if ! qt $IPSET -L $ipset -n; then
	    fatal_error "Zone $zone, interface $interface is does not have a dynamic host list"
	fi

	host=${host#*:}

	if $IPSET -A $ipset $host; then
	    echo "Host $interface:$host added to zone $zone"
	else
	    fatal_error "Unable to add $interface:$host to zone $zone"
	fi
    done

}

#
# delete command executor
#
delete_command() {
    local interface host hostent hostlist zone ipset
    if ! shorewall_is_started ; then
	echo "Shorewall Not Started" >&2
	exit 2;
    fi

    case "$IPSET" in
	*/*)
	    ;;
	*)
	    [ -n "$(mywhich $IPSET)" ] || fatal_error "The $IPSET utility cannot be located"
	    ;;
    esac

    #
    # Normalize host list
    #
    while [ $# -gt 1 ]; do
	interface=${1%%:*}
	host=${1#*:}
	[ "$host" = "$1" ] && host=

	if [ -z "$host" ]; then
	    hostlist="$hostlist $interface:0.0.0.0/0"
	else
	    for h in $(separate_list $host); do
		hostlist="$hostlist $interface:$h"
	    done
	fi

	shift
    done

    zone=$1

    for hostent in $hostlist; do
	interface=${hostent%:*}

	ipset=${zone}_${interface};

	if ! qt $IPSET -L $ipset -n; then
	    fatal_error "Zone $zone, interface $interface is does not have a dynamic host list"
	fi

	host=${hostent#*:}

	if $IPSET -D $ipset $host; then
	    echo "Host $hostend deleted from zone $zone"
	else
	    echo "   WARNING: Unable to delete host $hostent to zone $zone" >&2
	fi
    done

}

#
# 'hits' commmand executor
#
hits_command() {
    local finished
    finished=0
    local today
    today=

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

		while [ -n "$option" ]; do
		    case $option in
			-)
			    finished=1
			    option=
			    ;;
			t*)
			    today=$(date +'^%b %_d.*')
			    option=${option#t}
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    [ $# -eq 0 ] || usage 1

    clear_term
    echo "$g_product $SHOREWALL_VERSION Hits at $g_hostname - $(date)"
    echo

    timeout=30

    if $g_logread | grep -q "${today}IN=.* OUT=" ; then
	echo "   HITS IP	        DATE"
	echo "   ---- --------------- ------"
	$g_logread | grep "${today}IN=.* OUT=" | sed 's/\(.\{6\}\)\(.*SRC=\)\(.*\)\( DST=.*\)/\3	\1/' | sort | uniq -c | sort -rn | while read count address month day; do
	    printf '%7d %-15s %3s %2d\n' $count $address $month $day
	done

	echo ""

	echo "   HITS IP	        PORT"
	echo "   ---- --------------- -----"
	$g_logread | grep  "${today}IN=.* OUT=" | sed 's/\(.*SRC=\)\(.*\)\( DST=.*DPT=\)\([0-9]\{1,5\}\)\(.*\)/\2	\4/
						t
						s/\(.*SRC=\)\(.*\)\( DST=.*\)/\2/' | sort | uniq -c | sort -rn | while read count address port; do
	    printf '%7d %-15s %d\n' $count $address $port
	done

	echo ""

	echo "   HITS DATE"
	echo "   ---- ------"
	$g_logread | grep  "${today}IN=.* OUT=" | sed 's/\(.\{6\}\)\(.*\)/\1/' | sort | uniq -c | sort -rn | while read count month day; do
	    printf '%7d %3s %2d\n' $count $month $day
	done

	echo ""

	echo "   HITS  PORT SERVICE(S)"
	echo "   ---- ----- ----------"
	$g_logread | grep "${today}IN=.* OUT=.*DPT" | sed 's/\(.*DPT=\)\([0-9]\{1,5\}\)\(.*\)/\2/' | sort | uniq -c | sort -rn | while read count port ; do
	    # List all services defined for the given port
	    srv=$(grep "^[^#].*\\b$port/" /etc/services | cut -f 1 | cut -f 1 -d' ' | sort -u)
	    srv=$(echo $srv | sed 's/ /,/g')

	    if [ -n "$srv" ] ; then
		printf '%7d %5d %s\n' $count $port $srv
	    else
		printf '%7d %5d\n' $count $port
	    fi
	done
    fi
}

#
# 'allow' command executor
#
allow_command() {
    [ -n "$g_debugging" ] && set -x
    [ $# -eq 1 ] && usage 1
    if shorewall_is_started ; then
	local which
	which='-s'
	local range
	range='--src-range'

	if ! chain_exists dynamic; then
	    echo "Dynamic blacklisting is not enabled in the current $g_product configuration" >&2
	    exit 2
	fi

	[ -n "$nolock" ] || mutex_on
	while [ $# -gt 1 ]; do
	    shift
	    case $1 in
		from)
		    which='-s'
		    range='--src-range'
		    continue
		    ;;
		to)
		    which='-d'
		    range='--dst-range'
		    continue
		    ;;
		*-*)
		    if  qt $IPTABLES -D dynamic -m iprange $range $1 -j reject    ||\
			qt $IPTABLES -D dynamic -m iprange $range $1 -j DROP      ||\
			qt $IPTABLES -D dynamic -m iprange $range $1 -j logdrop   ||\
			qt $IPTABLES -D dynamic -m iprange $range $1 -j logreject
			then
			echo "$1 Allowed"
		    else
			echo "$1 Not Dropped or Rejected"
		    fi
		    ;;
		*)
		    if  qt $IPTABLES -D dynamic $which $1 -j reject    ||\
			qt $IPTABLES -D dynamic $which $1 -j DROP      ||\
			qt $IPTABLES -D dynamic $which $1 -j logdrop   ||\
			qt $IPTABLES -D dynamic $which $1 -j logreject
			then
			echo "$1 Allowed"
		    else
			echo "$1 Not Dropped or Rejected"
		    fi
		    ;;
	    esac
	done
	[ -n "$nolock" ] || mutex_off
    else
	error_message "ERROR: $g_product is not started"
	exit 2
    fi
}

#
# 'logwatch' command executor
#
logwatch_command() {
    shift

    finished=0

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

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

		while [ -n "$option" ]; do
		    case $option in
			v*)
			    VERBOSITY=$(($VERBOSITY + 1 ))
			    option=${option#v}
			    ;;
			q*)
			    VERBOSITY=$(($VERBOSITY - 1 ))
			    option=${option#q}
			    ;;
			m*)
			    g_showmacs=Yes
			    option=${option#m}
			    ;;
			-)
			    finished=1
			    option=
			    ;;
			*)
			    usage 1
			    ;;
		    esac
		done
		shift
		;;
	    *)
		finished=1
		;;
	esac
    done

    [ -n "$g_debugging" ] && set -x

    if [ $# -eq 1 ]; then
	logwatch $1
    elif [ $# -eq 0 ]; then
	logwatch 30
    else
	usage 1
    fi
}

#
# Determine which optional facilities are supported by iptables/netfilter
#
determine_capabilities() {
    [ -n "$IPTABLES" ] || IPTABLES=$(mywhich iptables)

    if [ -z "$IPTABLES" ]; then
	echo "   ERROR: No executable iptables binary can be found on your PATH" >&2
	exit 1
    fi

    [ "$IP" = ip -o -z "$IP" ] && IP=$(which ip)

    [ -n "$IP" -a -x "$IP" ] || IP=

    [ "$TC" = tc -o -z "$TC" ] && TC=$(which tc)

    [ -n "$TC" -a -x "$TC" ] || TC=

    qt $IPTABLES -t nat    -L -n && NAT_ENABLED=Yes    || NAT_ENABLED=
    qt $IPTABLES -t mangle -L -n && MANGLE_ENABLED=Yes || MANGLE_ENABLED=

    CONNTRACK_MATCH=
    NEW_CONNTRACK_MATCH=
    OLD_CONNTRACK_MATCH=
    MULTIPORT=
    XMULTIPORT=
    POLICY_MATCH=
    PHYSDEV_MATCH=
    PHYSDEV_BRIDGE=
    IPRANGE_MATCH=
    RECENT_MATCH=
    OWNER_MATCH=
    IPSET_MATCH=
    OLD_IPSET_MATCH=
    CONNMARK=
    XCONNMARK=
    CONNMARK_MATCH=
    XCONNMARK_MATCH=
    RAW_TABLE=
    IPP2P_MATCH=
    OLD_IPP2P_MATCH=
    LENGTH_MATCH=
    CLASSIFY_TARGET=
    ENHANCED_REJECT=
    USEPKTTYPE=
    KLUDGEFREE=
    MARK=
    XMARK=
    EXMARK=
    TPROXY_TARGET=
    MANGLE_FORWARD=
    COMMENTS=
    ADDRTYPE=
    TCPMSS_MATCH=
    HASHLIMIT_MATCH=
    NFQUEUE_TARGET=
    REALM_MATCH=
    HELPER_MATCH=
    CONNLIMIT_MATCH=
    TIME_MATCH=
    GOTO_TARGET=
    LOGMARK_TARGET=
    IPMARK_TARGET=
    LOG_TARGET=Yes
    PERSISTENT_SNAT=
    FLOW_FILTER=
    FWMARK_RT_MASK=
    MARK_ANYWHERE=
    HEADER_MATCH=
    ACCOUNT_TARGET=

    chain=fooX$$

    if [ -n "$NAT_ENABLED" ]; then
	if qt $IPTABLES -t nat -N $chain; then
	    qt $IPTABLES -t nat -A $chain -j SNAT --to-source 1.2.3.4 --persistent && PERSISTENT_SNAT=Yes
	    qt $IPTABLES -t nat -F $chain
	    qt $IPTABLES -t nat -X $chain
	fi
    fi

    qt $IPTABLES -F $chain
    qt $IPTABLES -X $chain
    if ! $IPTABLES -N $chain; then
	echo "   ERROR: The command \"$IPTABLES -N $chain\" failed" >&2
	exit 1
    fi

    chain1=${chain}1

    qt $IPTABLES -F $chain1
    qt $IPTABLES -X $chain1
    if ! $IPTABLES -N $chain1; then
	echo "   ERROR: The command \"$IPTABLES -N $chain1\" failed" >&2
	exit 1
    fi

    if ! qt $IPTABLES -A $chain -m state --state ESTABLISHED,RELATED -j ACCEPT &&
       ! qt $IPTABLES -A $chain -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT; then
	echo "   ERROR: Your kernel lacks connection tracking and/or state matching -- Shorewall will not run on this system" >&2
	exit 1
    fi

    qt $IPTABLES -A $chain -m conntrack --ctorigdst 192.168.1.1 -j ACCEPT && CONNTRACK_MATCH=Yes

    if [ -n "$CONNTRACK_MATCH" ]; then
	qt $IPTABLES -A $chain -m conntrack -p tcp --ctorigdstport 22 -j ACCEPT && NEW_CONNTRACK_MATCH=Yes
	qt $IPTABLES -A $chain -m conntrack ! --ctorigdst 1.2.3.4 || OLD_CONNTRACK_MATCH=Yes
    fi

    if qt $IPTABLES -A $chain -p tcp -m multiport --dports 21,22 -j ACCEPT; then
	MULTIPORT=Yes
	qt $IPTABLES -A $chain -p tcp -m multiport --sports 60 -m multiport --dports 99 -j ACCEPT && KLUDEFREE=Yes
    fi

    qt $IPTABLES -A $chain -p tcp -m multiport --dports 21:22 -j ACCEPT           && XMULTIPORT=Yes
    qt $IPTABLES -A $chain -m policy --pol ipsec --mode tunnel --dir in -j ACCEPT && POLICY_MATCH=Yes

    if qt $IPTABLES -A $chain -m physdev --physdev-out eth0 -j ACCEPT; then
	PHYSDEV_MATCH=Yes
	qt $IPTABLES -A $chain -m physdev --physdev-is-bridged --physdev-in eth0 --physdev-out eth0 -j ACCEPT && PHYSDEV_BRIDGE=Yes
	if [ -z "${KLUDGEFREE}" ]; then
	    qt $IPTABLES -A $chain -m physdev --physdev-in eth0 -m physdev --physdev-out eth0 -j ACCEPT && KLUDGEFREE=Yes
	fi
    fi

    if qt $IPTABLES -A $chain -m iprange --src-range 192.168.1.5-192.168.1.124 -j ACCEPT; then
	IPRANGE_MATCH=Yes
	if [ -z "${KLUDGEFREE}" ]; then
	    qt $IPTABLES -A $chain -m iprange --src-range 192.168.1.5-192.168.1.124 -m iprange --dst-range 192.168.1.5-192.168.1.124 -j ACCEPT && KLUDGEFREE=Yes
	fi
    fi

    qt $IPTABLES -A $chain -m recent --update -j ACCEPT     && RECENT_MATCH=Yes
    qt $IPTABLES -A $chain -m owner --uid-owner 0 -j ACCEPT && OWNER_MATCH=Yes

    if qt $IPTABLES -A $chain -m connmark --mark 2  -j ACCEPT; then
	CONNMARK_MATCH=Yes
	qt $IPTABLES -A $chain -m connmark --mark 2/0xFF -j ACCEPT && XCONNMARK_MATCH=Yes
    fi

    qt $IPTABLES -A $chain -p tcp -m ipp2p --edk -j ACCEPT       && IPP2P_MATCH=Yes
    if [ -n "$IPP2P_MATCH" ]; then
	qt $IPTABLES -A $chain -p tcp -m ipp2p --ipp2p -j ACCEPT && OLD_IPP2P_MATCH=Yes
    fi

    qt $IPTABLES -A $chain -m length --length 10:20 -j ACCEPT           && LENGTH_MATCH=Yes
    qt $IPTABLES -A $chain -j REJECT --reject-with icmp-host-prohibited && ENHANCED_REJECT=Yes

    qt $IPTABLES -A $chain -j ACCEPT -m comment --comment "This is a comment" && COMMENTS=Yes

    if [ -n "$MANGLE_ENABLED" ]; then
	qt $IPTABLES -t mangle -N $chain

	if qt $IPTABLES -t mangle -A $chain -j MARK --set-mark 1; then
	    MARK=Yes
	    qt $IPTABLES -t mangle -A $chain -j MARK --and-mark 0xFF && XMARK=Yes
	    qt $IPTABLES -t mangle -A $chain -j MARK --set-mark 1/0xFF && EXMARK=Yes
	fi

	if qt $IPTABLES -t mangle -A $chain -j CONNMARK --save-mark; then
	    CONNMARK=Yes
	    qt $IPTABLES -t mangle -A $chain -j CONNMARK --save-mark --mask 0xFF && XCONNMARK=Yes
	fi

	qt $IPTABLES -t mangle -A $chain -j CLASSIFY --set-class 1:1 && CLASSIFY_TARGET=Yes
	qt $IPTABLES -t mangle -A $chain -j IPMARK --addr src && IPMARK_TARGET=Yes
	qt $IPTABLES -t mangle -A $chain -p tcp -j TPROXY --on-port 0 --tproxy-mark 1 && TPROXY_TARGET=Yes
	qt $IPTABLES -t mangle -F $chain
	qt $IPTABLES -t mangle -X $chain
	qt $IPTABLES -t mangle -L FORWARD -n && MANGLE_FORWARD=Yes
    fi

    qt $IPTABLES -t raw	   -L -n && RAW_TABLE=Yes

    if qt mywhich ipset; then
	qt ipset -X $chain # Just in case something went wrong the last time

	if qt ipset -N $chain iphash ; then
	    if qt $IPTABLES -A $chain -m set --match-set $chain src -j ACCEPT; then
		qt $IPTABLES -D $chain -m set --match-set $chain src -j ACCEPT
		IPSET_MATCH=Yes
	    elif qt $IPTABLES -A $chain -m set --set $chain src -j ACCEPT; then
		qt $IPTABLES -D $chain -m set --set $chain src -j ACCEPT
		IPSET_MATCH=Yes
		OLD_IPSET_MATCH=Yes
	    fi
	    qt ipset -X $chain
	fi
    fi

    qt $IPTABLES -A $chain -m pkttype --pkt-type broadcast -j ACCEPT && USEPKTTYPE=Yes
    qt $IPTABLES -A $chain -m addrtype --src-type BROADCAST -j ACCEPT && ADDRTYPE=Yes
    qt $IPTABLES -A $chain -p tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1000:1500 -j ACCEPT && TCPMSS_MATCH=Yes
    qt $IPTABLES -A $chain -m hashlimit --hashlimit-upto 4 --hashlimit-burst 5 --hashlimit-name $chain --hashlimit-mode dstip -j ACCEPT && HASHLIMIT_MATCH=Yes
    if [ -z "$HASHLIMIT_MATCH" ]; then
	qt $IPTABLES -A $chain -m hashlimit --hashlimit 4 --hashlimit-burst 5 --hashlimit-name $chain --hashlimit-mode dstip -j ACCEPT && OLD_HL_MATCH=Yes
	HASHLIMIT_MATCH=$OLD_HL_MATCH
    fi
    qt $IPTABLES -A $chain -j NFQUEUE --queue-num 4 && NFQUEUE_TARGET=Yes
    qt $IPTABLES -A $chain -m realm --realm 4 && REALM_MATCH=Yes
    qt $IPTABLES -A $chain -m helper --helper "ftp" && HELPER_MATCH=Yes
    qt $IPTABLES -A $chain -m connlimit --connlimit-above 8 -j DROP && CONNLIMIT_MATCH=Yes
    qt $IPTABLES -A $chain -m time --timestart 23:00 -j DROP && TIME_MATCH=Yes
    qt $IPTABLES -A $chain -g $chain1 && GOTO_TARGET=Yes
    qt $IPTABLES -A $chain -j LOGMARK && LOGMARK_TARGET=Yes
    qt $IPTABLES -A $chain -j LOG || LOG_TARGET=
    qt $IPTABLES -A $chain -j MARK --set-mark 5 && MARK_ANYWHERE=Yes
    qt $IPTABLES -A $chain -j ACCOUNT --addr 192.168.1.0/29 --tname $chain && ACCOUNT_TARGET=Yes

    qt $IPTABLES -F $chain
    qt $IPTABLES -X $chain
    qt $IPTABLES -F $chain1
    qt $IPTABLES -X $chain1

    [ -n "$TC" ] && $TC filter add flow help 2>&1 | grep -q ^Usage && FLOW_FILTER=Yes
    [ -n "$IP" ] && $IP rule add help 2>&1 | grep -q /MASK && FWMARK_RT_MASK=Yes

    CAPVERSION=$SHOREWALL_CAPVERSION
    KERNELVERSION=$(printf "%d%02d%02d" $(uname -r 2> /dev/null | sed -e 's/-.*//' -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*$/\1 \2 \3/g'))
}

report_capabilities() {
    report_capability() # $1 = Capability Description , $2 Capability Setting (if any)
    {
	local setting
	setting=

	[ "x$2" = "xYes" ] && setting="Available" || setting="Not available"

	echo "  " $1: $setting
    }

    if [ $VERBOSITY -gt 1 ]; then
	echo "Shorewall has detected the following iptables/netfilter capabilities:"
	report_capability "NAT" $NAT_ENABLED
	report_capability "Packet Mangling" $MANGLE_ENABLED
	report_capability "Multi-port Match" $MULTIPORT
	[ -n "$MULTIPORT" ] && report_capability "Extended Multi-port Match" $XMULTIPORT
	report_capability "Connection Tracking Match" $CONNTRACK_MATCH
	if [ -n "$CONNTRACK_MATCH" ]; then
	    report_capability "Extended Connection Tracking Match Support" $NEW_CONNTRACK_MATCH
	    [ -n "$OLD_CONNTRACK_MATCH" ] && report_capability "Old Connection Tracking Match Syntax" $OLD_CONNTRACK_MATCH
	fi
	report_capability "Packet Type Match" $USEPKTTYPE
	report_capability "Policy Match" $POLICY_MATCH
	report_capability "Physdev Match" $PHYSDEV_MATCH
	report_capability "Physdev-is-bridged Support" $PHYSDEV_BRIDGE
	report_capability "Packet length Match" $LENGTH_MATCH
	report_capability "IP range Match" $IPRANGE_MATCH
	report_capability "Recent Match" $RECENT_MATCH
	report_capability "Owner Match" $OWNER_MATCH
	if [ -n "$IPSET_MATCH" ]; then
	    report_capability "Ipset Match" $IPSET_MATCH
	    [ -n "$OLD_IPSET_MATCH" ] && report_capability "OLD_Ipset Match" $OLD_IPSET_MATCH
	fi
	report_capability "CONNMARK Target" $CONNMARK
	[ -n "$CONNMARK" ] && report_capability "Extended CONNMARK Target" $XCONNMARK
	report_capability "Connmark Match" $CONNMARK_MATCH
	[ -n "$CONNMARK_MATCH" ] && report_capability "Extended Connmark Match" $XCONNMARK_MATCH
	report_capability "Raw Table" $RAW_TABLE
	report_capability "IPP2P Match" $IPP2P_MATCH
	[ -n "$OLD_IPP2P_MATCH" ] && report_capability "Old IPP2P Match Syntax" $OLD_IPP2P_MATCH
	report_capability "CLASSIFY Target" $CLASSIFY_TARGET
	report_capability "Extended REJECT" $ENHANCED_REJECT
	report_capability "Repeat match" $KLUDGEFREE
	report_capability "MARK Target" $MARK
	[ -n "$MARK" ] && report_capability "Extended MARK Target" $XMARK
	[ -n "$XMARK" ] && report_capability "Extended MARK Target 2" $EXMARK
	report_capability "Mangle FORWARD Chain" $MANGLE_FORWARD
	report_capability "Comments" $COMMENTS
	report_capability "Address Type Match" $ADDRTYPE
	report_capability "TCPMSS Match" $TCPMSS_MATCH
	report_capability "Hashlimit Match" $HASHLIMIT_MATCH
	[ -n "$OLD_HL_MATCH" ] && report_capability "Old Hashlimit Match" $OLD_HL_MATCH
	report_capability "NFQUEUE Target" $NFQUEUE_TARGET
	report_capability "Realm Match" $REALM_MATCH
	report_capability "Helper Match" $HELPER_MATCH
	report_capability "Connlimit Match" $CONNLIMIT_MATCH
	report_capability "Time Match" $TIME_MATCH
	report_capability "Goto Support" $GOTO_TARGET
	report_capability "LOGMARK Target" $LOGMARK_TARGET
	report_capability "IPMARK Target" $IPMARK_TARGET
	report_capability "LOG Target" $LOG_TARGET
	report_capability "Persistent SNAT" $PERSISTENT_SNAT
	report_capability "TPROXY Target" $TPROXY_TARGET
	report_capability "FLOW Classifier" $FLOW_FILTER
	report_capability "fwmark route mask" $FWMARK_RT_MASK
	report_capability "Mark in any table" $MARK_ANYWHERE
	report_capability "Header Match" $HEADER_MATCH
        report_capability "ACCOUNT Target" $ACCOUNT_TARGET
    fi

    [ -n "$PKTTYPE" ] || USEPKTTYPE=

}

report_capabilities1() {
    report_capability1() # $1 = Capability
    {
	eval echo $1=\$$1
    }

    echo "#"
    echo "# Shorewall $SHOREWALL_VERSION detected the following iptables/netfilter capabilities - $(date)"
    echo "#"
    report_capability1 NAT_ENABLED
    report_capability1 MANGLE_ENABLED
    report_capability1 MULTIPORT
    report_capability1 XMULTIPORT
    report_capability1 CONNTRACK_MATCH
    report_capability1 NEW_CONNTRACK_MATCH
    report_capability1 OLD_CONNTRACK_MATCH
    report_capability1 USEPKTTYPE
    report_capability1 POLICY_MATCH
    report_capability1 PHYSDEV_MATCH
    report_capability1 PHYSDEV_BRIDGE
    report_capability1 LENGTH_MATCH
    report_capability1 IPRANGE_MATCH
    report_capability1 RECENT_MATCH
    report_capability1 OWNER_MATCH
    report_capability1 IPSET_MATCH
    report_capability1 OLD_IPSET_MATCH
    report_capability1 CONNMARK
    report_capability1 XCONNMARK
    report_capability1 CONNMARK_MATCH
    report_capability1 XCONNMARK_MATCH
    report_capability1 RAW_TABLE
    report_capability1 IPP2P_MATCH
    report_capability1 OLD_IPP2P_MATCH
    report_capability1 CLASSIFY_TARGET
    report_capability1 ENHANCED_REJECT
    report_capability1 KLUDGEFREE
    report_capability1 MARK
    report_capability1 XMARK
    report_capability1 EXMARK
    report_capability1 MANGLE_FORWARD
    report_capability1 COMMENTS
    report_capability1 ADDRTYPE
    report_capability1 TCPMSS_MATCH
    report_capability1 HASHLIMIT_MATCH
    report_capability1 OLD_HL_MATCH
    report_capability1 NFQUEUE_TARGET
    report_capability1 REALM_MATCH
    report_capability1 HELPER_MATCH
    report_capability1 CONNLIMIT_MATCH
    report_capability1 TIME_MATCH
    report_capability1 GOTO_TARGET
    report_capability1 LOGMARK_TARGET
    report_capability1 IPMARK_TARGET
    report_capability1 LOG_TARGET
    report_capability1 PERSISTENT_SNAT
    report_capability1 TPROXY_TARGET
    report_capability1 FLOW_FILTER
    report_capability1 FWMARK_RT_MASK
    report_capability1 MARK_ANYWHERE
    report_capability1 HEADER_MATCH
    report_capability1 ACCOUNT_TARGET

    echo CAPVERSION=$SHOREWALL_CAPVERSION
    echo KERNELVERSION=$KERNELVERSION
}