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shorewall_code/Shorewall/lib.cli
teastep 97817453e6 Update copyrights to 2007 
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5217 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
2007-01-12 22:06:29 +00:00

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#!/bin/sh
#
# Shorewall 3.4 -- /usr/share/shorewall/lib.cli.
#
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
#
# (c) 1999,2000,2001,2002,2003,2004,2005,2006,2007 - 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., 675 Mass Ave, Cambridge, MA 02139, 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 tty flags cputime path args 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() # $1 = number of messages
{
local options
[ -n "$realtail" ] && options="-n$1"
if [ -n "$SHOWMACS" -o $VERBOSE -gt 2 ]; then
$LOGREAD | grep 'IN=.* OUT=' | sed 's/ kernel://; s/\[.*\] //' | sed s/" $host $LOGFORMAT"/" "/ | tail $options
else
$LOGREAD | grep 'IN=.* OUT=' | sed 's/ kernel://; s/MAC=.* SRC=/SRC=/; s/\[.*\] '// | sed s/" $host $LOGFORMAT"/" "/ | tail $options
fi
}
#
# Show traffic control information
#
show_tc() {
show_one_tc() {
local device=${1%@*}
qdisc=$(tc qdisc list dev $device)
if [ -n "$qdisc" ]; then
echo Device $device:
tc -s -d qdisc show dev $device
tc -s -d class show dev $device
echo
fi
}
ip link list | \
while read inx interface details; do
case $inx in
[0-9]*)
show_one_tc ${interface%:}
;;
*)
;;
esac
done
}
#
# Show classifier information
#
show_classifiers() {
show_one_classifier() {
local device=${1%@*}
qdisc=$(tc qdisc list dev $device)
if [ -n "$qdisc" ]; then
echo Device $device:
tc -s filter ls dev $device
echo
fi
}
ip link list | \
while read inx interface details; do
case $inx in
[0-9]*)
show_one_classifier ${interface%:}
;;
*)
;;
esac
done
}
#
# Watch the Firewall Log
#
logwatch() # $1 = timeout -- if negative, prompt each time that
# an 'interesting' packet count changes
{
host=$(echo $HOSTNAME | sed 's/\..*$//')
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"
$RING_BELL
packet_log 40
if [ "$pause" = "Yes" ]; then
echo
echo $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
#
save_config() {
if shorewall_is_started ; then
[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
if [ -f $RESTOREPATH -a ! -x $RESTOREPATH ]; then
echo " ERROR: $RESTOREPATH exists and is not a saved $PRODUCT configuration"
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"
;;
*)
validate_restorefile RESTOREFILE
if $IPTABLES -L dynamic -n > ${VARDIR}/save; then
echo " Dynamic Rules Saved"
if [ -f ${VARDIR}/.restore ]; then
if iptables-save | iptablesbug > ${VARDIR}/restore-$$; then
cp -f ${VARDIR}/.restore $RESTOREPATH
mv -f ${VARDIR}/restore-$$ ${RESTOREPATH}-iptables
chmod +x $RESTOREPATH
echo " Currently-running Configuration Saved to $RESTOREPATH"
rm -f ${RESTOREPATH}-ipsets
case ${SAVE_IPSETS:-No} in
[Yy][Ee][Ss])
RESTOREPATH=${RESTOREPATH}-ipsets
f=${VARDIR}/restore-$$
echo "#!/bin/sh" > $f
echo "#This ipset restore file generated $(date) by Shorewall $version" >> $f
echo >> $f
echo ". ${SHAREDIR}/lib.base" >> $f
echo >> $f
cat ${VARDIR}/.modulesdir >> $f
echo >> $f
echo "reload_kernel_modules << __EOF__" >> $f
grep 'loadmodule ip_set' ${VARDIR}/.modules >> $f
echo "__EOF__" >> $f
echo >> $f
echo "ipset -U :all: :all:" >> $f
echo "ipset -F" >> $f
echo "ipset -X" >> $f
echo "ipset -R << __EOF__" >> $f
ipset -S >> $f
echo "__EOF__" >> $f
mv -f $f $RESTOREPATH
chmod +x $RESTOREPATH
echo " Current Ipset Contents Saved to $RESTOREPATH"
;;
[Nn][Oo])
;;
*)
echo " WARNING: Invalid value ($SAVE_IPSETS) for SAVE_IPSETS. Ipset contents not saved"
;;
esac
else
rm -f ${VARDIR}/restore-$$
echo " ERROR: Currently-running Configuration Not Saved"
fi
else
echo " ERROR: ${VARDIR}/.restore does not exist"
fi
else
echo "Error Saving the Dynamic Rules"
fi
;;
esac
fi
else
echo "Shorewall isn't started"
fi
}
#
# Show routing configuration
#
show_routing() {
if [ -n "$(ip rule ls)" ]; then
heading "Routing Rules"
ip rule ls
ip rule ls | while read rule; do
echo ${rule##* }
done | sort -u | while read table; do
heading "Table $table:"
ip route ls table $table
done
else
heading "Routing Table"
ip route ls
fi
}
#
# Show Command Executor
#
show_command() {
local finished=0 local table=filter
show_macro() {
foo=`grep 'This macro' $macro | sed 's/This macro //'`
if [ -n "$foo" ]; then
macro=${macro#*.}
foo=${foo%.*}
echo " $macro ${foo#\#}"
fi
}
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
v*)
VERBOSE=$(($VERBOSE + 1 ))
option=${option#v}
;;
x*)
IPT_OPTIONS="-xnv"
option=${option#x}
;;
m*)
SHOWMACS=Yes
option=${option#m}
;;
f*)
FILEMODE=Yes
option=${option#f}
;;
t)
[ $# -eq 1 ] && usage 1
case $2 in
mangle|nat|filter|raw)
table=$2
;;
*)
fatal_error "Invalid table name ($s)"
;;
esac
option=
shift
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ -n "$debugging" ] && set -x
case "$1" in
connections)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Connections at $HOSTNAME - $(date)"
echo
cat /proc/net/ip_conntrack
;;
nat)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version NAT Table at $HOSTNAME - $(date)"
echo
show_reset
$IPTABLES -t nat -L $IPT_OPTIONS
;;
tos|mangle)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Mangle Table at $HOSTNAME - $(date)"
echo
show_reset
$IPTABLES -t mangle -L $IPT_OPTIONS
;;
log)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Log ($LOGFILE) at $HOSTNAME - $(date)"
echo
show_reset
host=$(echo $HOSTNAME | sed 's/\..*$//')
packet_log 20
;;
tc)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Traffic Control at $HOSTNAME - $(date)"
echo
show_tc
;;
classifiers)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Clasifiers at $HOSTNAME - $(date)"
echo
show_classifiers
;;
zones)
[ $# -gt 1 ] && usage 1
if [ -f ${VARDIR}/zones ]; then
echo "$PRODUCT $version Zones at $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)
[ $# -gt 1 ] && usage 1
determine_capabilities
VERBOSE=2
if [ -n "$FILEMODE" ]; then
report_capabilities1
else
report_capabilities
fi
;;
ip)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version IP at $HOSTNAME - $(date)"
echo
ip addr ls
;;
routing)
[ $# -gt 1 ] && usage 1
echo "$PRODUCT $version Routing at $HOSTNAME - $(date)"
echo
show_routing
;;
config)
. ${SHAREDIR}/configpath
echo "Default CONFIG_PATH is $CONFIG_PATH"
echo "LITEDIR is $LITEDIR"
;;
*)
if [ "$PRODUCT" = Shorewall ]; then
case $1 in
actions)
[ $# -gt 1 ] && usage 1
echo "allowBcast # Silently Allow Broadcast/multicast"
echo "dropBcast # Silently Drop Broadcast/multicast"
echo "dropNotSyn # Silently Drop Non-syn TCP packets"
echo "rejNotSyn # Silently Reject Non-syn TCP packets"
echo "dropInvalid # Silently Drop packets that are in the INVALID conntrack state"
echo "allowInvalid # Accept packets that are in the INVALID conntrack state."
echo "allowoutUPnP # Allow traffic from local command 'upnpd'"
echo "allowinUPnP # Allow UPnP inbound (to firewall) traffic"
echo "forwardUPnP # Allow traffic that upnpd has redirected from"
cat ${SHAREDIR}/actions.std ${CONFDIR}/actions | grep -Ev '^\#|^$'
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 $directory:"
echo
temp=Yes
fi
show_macro
;;
esac
done
done
return
;;
esac
fi
echo "$PRODUCT $version $([ $# -gt 1 ] && echo "Chains " || [ $# -gt 0 ] && echo "Chain " || echo $table Table)$* at $HOSTNAME - $(date)"
echo
show_reset
if [ $# -gt 0 ]; then
for chain in $*; do
$IPTABLES -t $table -L $chain $IPT_OPTIONS
done
else
$IPTABLES -t $table -L $IPT_OPTIONS
fi
;;
esac
}
#
# Dump Command Executor
#
dump_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
x*)
IPT_OPTIONS="-xnv"
option=${option#x}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ $VERBOSE -lt 2 ] && VERBOSE=2
[ -n "$debugging" ] && set -x
[ $# -eq 0 ] || usage 1
clear_term
echo "$PRODUCT $version Dump at $HOSTNAME - $(date)"
echo
show_reset
host=$(echo $HOSTNAME | sed 's/\..*$//')
$IPTABLES -L $IPT_OPTIONS
heading "Log ($LOGFILE)"
packet_log 20
heading "NAT Table"
$IPTABLES -t nat -L $IPT_OPTIONS
heading "Mangle Table"
$IPTABLES -t mangle -L $IPT_OPTIONS
heading "Conntrack Table"
cat /proc/net/ip_conntrack
heading "IP Configuration"
ip addr ls
heading "IP Stats"
ip -stat link ls
if qt mywhich brctl; then
heading "Bridges"
brctl show
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_'
fi
determine_capabilities
echo
report_capabilities
if [ -n "$TC_ENABLED" ]; then
heading "Traffic Control"
show_tc
heading "TC Filters"
show_classifiers
fi
}
#
# Restore Comand Executor
#
restore_command() {
local finished=0
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
n*)
NOROUTES=Yes
option=${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
RESTOREPATH=${VARDIR}/$RESTOREFILE
export NOROUTES
[ -n "$nolock" ] || mutex_on
if [ -x $RESTOREPATH ]; then
if [ -x ${RESTOREPATH}-ipsets ] ; then
echo Restoring Ipsets...
iptables -F
iptables -X
$SHOREWALL_SHELL ${RESTOREPATH}-ipsets
fi
progress_message3 "Restoring Shorewall..."
$SHOREWALL_SHELL $RESTOREPATH restore && progress_message3 "$PRODUCT restored from ${VARDIR}/$RESTOREFILE"
[ -n "$nolock" ] || mutex_off
else
echo "File ${VARDIR}/$RESTOREFILE: 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 "$@"
echo
}
#
# Create the appropriate -q option to pass onward
#
make_verbose() {
local v=$VERBOSE_OFFSET option=-
if [ $VERBOSE_OFFSET -gt 0 ]; then
while [ $v -gt 0 ]; do
option="${option}v"
v=$(($v - 1))
done
echo $option
elif [ $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 = Original Command $4 - $n addresses
{
local chain=$1 finished=$2
shift 3
while [ $# -gt 0 ]; do
case $1 in
*-*)
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j reject
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j DROP
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j logreject
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j logdrop
$IPTABLES -A dynamic -m iprange --src-range $1 -j $chain || break 1
;;
*)
qt $IPTABLES -D dynamic -s $1 -j reject
qt $IPTABLES -D dynamic -s $1 -j DROP
qt $IPTABLES -D dynamic -s $1 -j logreject
qt $IPTABLES -D dynamic -s $1 -j logdrop
$IPTABLES -A dynamic -s $1 -j $chain || break 1
;;
esac
echo "$1 $finished"
shift
done
}
#
# 'hits' commmand executor
#
hits_command() {
clear_term
echo "$PRODUCT $version Hits at $HOSTNAME - $(date)"
echo
timeout=30
if [ $( $LOGREAD | grep -c 'IN=.* OUT=' ) -gt 0 ] ; then
echo " HITS IP DATE"
echo " ---- --------------- ------"
$LOGREAD | grep '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 " ---- --------------- -----"
$LOGREAD | grep '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 " ---- ------"
$LOGREAD | grep '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 " ---- ----- ----------"
$LOGREAD | grep '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 $port
fi
done
fi
}
#
# 'allow' command executor
#
allow_command() {
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
mutex_on
while [ $# -gt 1 ]; do
shift
case $1 in
*-*)
if qt $IPTABLES -D dynamic -m iprange --src-range $1 -j reject ||\
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j DROP ||\
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j logdrop ||\
qt $IPTABLES -D dynamic -m iprange --src-range $1 -j logreject
then
echo "$1 Allowed"
else
echo "$1 Not Dropped or Rejected"
fi
;;
*)
if qt $IPTABLES -D dynamic -s $1 -j reject ||\
qt $IPTABLES -D dynamic -s $1 -j DROP ||\
qt $IPTABLES -D dynamic -s $1 -j logdrop ||\
qt $IPTABLES -D dynamic -s $1 -j logreject
then
echo "$1 Allowed"
else
echo "$1 Not Dropped or Rejected"
fi
;;
esac
done
mutex_off
else
error_message "ERROR: $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 $option in
v*)
VERBOSE=$(($VERBOSE + 1 ))
option=${option#v}
;;
q*)
VERBOSE=$(($VERBOSE - 1 ))
option=${option#q}
;;
m*)
SHOWMACS=Yes
option=${option#m}
;;
-)
finished=1
option=
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ -n "$debugging" ] && set -x
if [ $# -eq 1 ]; then
logwatch $1
elif [ $# -eq 0 ]; then
logwatch 30
else
usage 1
fi
}
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