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shorewall_code/Shorewall/lib.base
Tom Eastep 4bf55883ee Auto-load cls_flow
2009-12-03 12:15:23 -08:00

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#!/bin/sh
#
# Shorewall 4.2 -- /usr/share/shorewall/lib.base
#
# 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 - 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 code common to all Shorewall components.
#
# - It is loaded by /sbin/shorewall.
# - It is loaded by /usr/share/shorewall/firewall.
# - It is released as part of Shorewall Lite where it is used by /sbin/shorewall-lite
# and /usr/share/shorewall-lite/shorecap.
#
SHOREWALL_LIBVERSION=40000
SHOREWALL_CAPVERSION=40402
[ -n "${VARDIR:=/var/lib/shorewall}" ]
[ -n "${SHAREDIR:=/usr/share/shorewall}" ]
[ -n "${CONFDIR:=/etc/shorewall}" ]
#
# Message to stderr
#
error_message() # $* = Error Message
{
echo " $@" >&2
}
#
# Conditionally produce message
#
progress_message() # $* = Message
{
local timestamp
timestamp=
if [ $VERBOSE -gt 1 ]; then
[ -n "$TIMESTAMP" ] && timestamp="$(date +%H:%M:%S) "
echo "${timestamp}$@"
fi
}
progress_message2() # $* = Message
{
local timestamp
timestamp=
if [ $VERBOSE -gt 0 ]; then
[ -n "$TIMESTAMP" ] && timestamp="$(date +%H:%M:%S) "
echo "${timestamp}$@"
fi
}
progress_message3() # $* = Message
{
local timestamp
timestamp=
if [ $VERBOSE -ge 0 ]; then
[ -n "$TIMESTAMP" ] && timestamp="$(date +%H:%M:%S) "
echo "${timestamp}$@"
fi
}
#
# Split a colon-separated list into a space-separated list
#
split() {
local ifs
ifs=$IFS
IFS=:
echo $*
IFS=$ifs
}
#
# Search a list looking for a match -- returns zero if a match found
# 1 otherwise
#
list_search() # $1 = element to search for , $2-$n = list
{
local e
e=$1
while [ $# -gt 1 ]; do
shift
[ "x$e" = "x$1" ] && return 0
done
return 1
}
#
# Undo the effect of 'separate_list()'
#
combine_list()
{
local f
local o
o=
for f in $* ; do
o="${o:+$o,}$f"
done
echo $o
}
#
# Suppress all output for a command
#
qt()
{
"$@" >/dev/null 2>&1
}
#
# Determine if Shorewall is "running"
#
shorewall_is_started() {
qt $IPTABLES -L shorewall -n
}
#
# Echos the fully-qualified name of the calling shell program
#
my_pathname() {
cd $(dirname $0)
echo $PWD/$(basename $0)
}
#
# Source a user exit file if it exists
#
run_user_exit() # $1 = file name
{
local user_exit
user_exit=$(find_file $1)
if [ -f $user_exit ]; then
progress_message "Processing $user_exit ..."
. $user_exit
fi
}
#
# Load a Kernel Module -- assumes that the variable 'moduledirectories' contains
# a space-separated list of directories to search for
# the module and that 'moduleloader' contains the
# module loader command.
#
loadmodule() # $1 = module name, $2 - * arguments
{
local modulename
modulename=$1
local modulefile
local suffix
if ! list_search $modulename $MODULES $DONT_LOAD ; then
shift
for suffix in $MODULE_SUFFIX ; do
for directory in $moduledirectories; do
modulefile=$directory/${modulename}.${suffix}
if [ -f $modulefile ]; then
case $moduleloader in
insmod)
insmod $modulefile $*
;;
*)
modprobe $modulename $*
;;
esac
break 2
fi
done
done
fi
}
#
# Reload the Modules
#
reload_kernel_modules() {
local save_modules_dir
save_modules_dir=$MODULESDIR
local directory
local moduledirectories
moduledirectories=
local moduleloader
moduleloader=modprobe
local uname
if ! qt mywhich modprobe; then
moduleloader=insmod
fi
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
[ -z "$MODULESDIR" ] && \
uname=$(uname -r) && \
MODULESDIR=/lib/modules/$uname/kernel/net/ipv4/netfilter:/lib/modules/$uname/kernel/net/netfilterr:/lib/modules/$uname/kernel/net/sched:/lib/modules/$uname/extra:/lib/modules/$uname/extra/ipset
MODULES=$(lsmod | cut -d ' ' -f1)
for directory in $(split $MODULESDIR); do
[ -d $directory ] && moduledirectories="$moduledirectories $directory"
done
[ -n "$moduledirectories" ] && while read command; do
eval $command
done
MODULESDIR=$save_modules_dir
}
#
# Load kernel modules required for Shorewall
#
load_kernel_modules() # $1 = Yes, if we are to save moduleinfo in $VARDIR
{
local save_modules_dir
save_modules_dir=$MODULESDIR
local directory
local moduledirectories
moduledirectories=
local moduleloader
moduleloader=modprobe
local savemoduleinfo
savemoduleinfo=${1:-Yes} # So old compiled scripts still work
local uname
if ! qt mywhich modprobe; then
moduleloader=insmod
fi
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
[ -z "$MODULESDIR" ] && \
uname=$(uname -r) && \
MODULESDIR=/lib/modules/$uname/kernel/net/ipv4/netfilter:/lib/modules/$uname/kernel/net/netfilterr:/lib/modules/$uname/kernel/net/sched:/lib/modules/$uname/extra:/lib/modules/$uname/extra/ipset
for directory in $(split $MODULESDIR); do
[ -d $directory ] && moduledirectories="$moduledirectories $directory"
done
modules=$(find_file modules)
if [ -f $modules -a -n "$moduledirectories" ]; then
MODULES=$(lsmod | cut -d ' ' -f1)
progress_message "Loading Modules..."
. $modules
if [ $savemoduleinfo = Yes ]; then
[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
echo MODULESDIR="$MODULESDIR" > ${VARDIR}/.modulesdir
cp -f $modules ${VARDIR}/.modules
fi
elif [ $savemoduleinfo = Yes ]; then
[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
> ${VARDIR}/.modulesdir
> ${VARDIR}/.modules
fi
MODULESDIR=$save_modules_dir
}
#
# Call this function to assert mutual exclusion with Shorewall. If you invoke the
# /sbin/shorewall program while holding mutual exclusion, you should pass "nolock" as
# the first argument. Example "shorewall nolock refresh"
#
# This function uses the lockfile utility from procmail if it exists.
# Otherwise, it uses a somewhat race-prone algorithm to attempt to simulate the
# behavior of lockfile.
#
mutex_on()
{
local try
try=0
local lockf
lockf=${LOCKFILE:=${VARDIR}/lock}
MUTEX_TIMEOUT=${MUTEX_TIMEOUT:-60}
if [ $MUTEX_TIMEOUT -gt 0 ]; then
[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
if qt mywhich lockfile; then
lockfile -${MUTEX_TIMEOUT} -r1 ${lockf}
else
while [ -f ${lockf} -a ${try} -lt ${MUTEX_TIMEOUT} ] ; do
sleep 1
try=$((${try} + 1))
done
if [ ${try} -lt ${MUTEX_TIMEOUT} ] ; then
# Create the lockfile
echo $$ > ${lockf}
else
echo "Giving up on lock file ${lockf}" >&2
fi
fi
fi
}
#
# Call this function to release mutual exclusion
#
mutex_off()
{
rm -f ${LOCKFILE:=${VARDIR}/lock}
}
#
# Note: The following set of IP address manipulation functions have anomalous
# behavior when the shell only supports 32-bit signed arithmetic and
# the IP address is 128.0.0.0 or 128.0.0.1.
#
LEFTSHIFT='<<'
#
# Validate an IP address
#
valid_address() {
local x
local y
local ifs
ifs=$IFS
IFS=.
for x in $1; do
case $x in
[0-9]|[0-9][0-9]|[1-2][0-9][0-9])
[ $x -lt 256 ] || { IFS=$ifs; return 2; }
;;
*)
IFS=$ifs
return 2
;;
esac
done
IFS=$ifs
return 0
}
#
# Convert an IP address in dot quad format to an integer
#
decodeaddr() {
local x
local temp
temp=0
local ifs
ifs=$IFS
IFS=.
for x in $1; do
temp=$(( $(( $temp $LEFTSHIFT 8 )) | $x ))
done
echo $temp
IFS=$ifs
}
#
# convert an integer to dot quad format
#
encodeaddr() {
addr=$1
local x
local y
y=$(($addr & 255))
for x in 1 2 3 ; do
addr=$(($addr >> 8))
y=$(($addr & 255)).$y
done
echo $y
}
#
# Miserable Hack to work around broken BusyBox ash in OpenWRT
#
addr_comp() {
test $(bc <<EOF
$1 > $2
EOF
) -eq 1
}
#
# Enumerate the members of an IP range -- When using a shell supporting only
# 32-bit signed arithmetic, the range cannot span 128.0.0.0.
#
# Comes in two flavors:
#
# ip_range() - produces a mimimal list of network/host addresses that spans
# the range.
#
# ip_range_explicit() - explicitly enumerates the range.
#
ip_range() {
local first
local last
local l
local x
local y
local z
local vlsm
case $1 in
!*)
#
# Let iptables complain if it's a range
#
echo $1
return
;;
[0-9]*.*.*.*-*.*.*.*)
;;
*)
echo $1
return
;;
esac
first=$(decodeaddr ${1%-*})
last=$(decodeaddr ${1#*-})
if addr_comp $first $last; then
fatal_error "Invalid IP address range: $1"
fi
l=$(( $last + 1 ))
while addr_comp $l $first; do
vlsm=
x=31
y=2
z=1
while [ $(( $first % $y )) -eq 0 ] && ! addr_comp $(( $first + $y )) $l; do
vlsm=/$x
x=$(( $x - 1 ))
z=$y
y=$(( $y * 2 ))
done
echo $(encodeaddr $first)$vlsm
first=$(($first + $z))
done
}
ip_range_explicit() {
local first
local last
case $1 in
[0-9]*.*.*.*-*.*.*.*)
;;
*)
echo $1
return
;;
esac
first=$(decodeaddr ${1%-*})
last=$(decodeaddr ${1#*-})
if addr_comp $first $last; then
fatal_error "Invalid IP address range: $1"
fi
while ! addr_comp $first $last; do
echo $(encodeaddr $first)
first=$(($first + 1))
done
}
#
# Netmask from CIDR
#
ip_netmask() {
local vlsm
vlsm=${1#*/}
[ $vlsm -eq 0 ] && echo 0 || echo $(( -1 $LEFTSHIFT $(( 32 - $vlsm )) ))
}
#
# Network address from CIDR
#
ip_network() {
local decodedaddr
decodedaddr=$(decodeaddr ${1%/*})
local netmask
netmask=$(ip_netmask $1)
echo $(encodeaddr $(($decodedaddr & $netmask)))
}
#
# The following hack is supplied to compensate for the fact that many of
# the popular light-weight Bourne shell derivatives don't support XOR ("^").
#
ip_broadcast() {
local x
x=$(( 32 - ${1#*/} ))
[ $x -eq 32 ] && echo -1 || echo $(( $(( 1 $LEFTSHIFT $x )) - 1 ))
}
#
# Calculate broadcast address from CIDR
#
broadcastaddress() {
local decodedaddr
decodedaddr=$(decodeaddr ${1%/*})
local netmask
netmask=$(ip_netmask $1)
local broadcast
broadcast=$(ip_broadcast $1)
echo $(encodeaddr $(( $(($decodedaddr & $netmask)) | $broadcast )))
}
#
# Test for network membership
#
in_network() # $1 = IP address, $2 = CIDR network
{
local netmask
netmask=$(ip_netmask $2)
#
# We compare the values as strings rather than integers to work around broken BusyBox ash on OpenWRT
#
test $(( $(decodeaddr $1) & $netmask)) = $(( $(decodeaddr ${2%/*}) & $netmask ))
}
#
# Netmask to VLSM
#
ip_vlsm() {
local mask
mask=$(decodeaddr $1)
local vlsm
vlsm=0
local x
x=$(( 128 << 24 )) # 0x80000000
while [ $(( $x & $mask )) -ne 0 ]; do
[ $mask -eq $x ] && mask=0 || mask=$(( $mask $LEFTSHIFT 1 )) # Not all shells shift 0x80000000 left properly.
vlsm=$(($vlsm + 1))
done
if [ $(( $mask & 2147483647 )) -ne 0 ]; then # 2147483647 = 0x7fffffff
echo "Invalid net mask: $1" >&2
else
echo $vlsm
fi
}
#
# Query NetFilter about the existence of a filter chain
#
chain_exists() # $1 = chain name
{
qt $IPTABLES -L $1 -n
}
#
# Find the interface with the passed MAC address
#
find_interface_by_mac() {
local mac
mac=$1
local first
local second
local rest
local dev
ip link list | while read first second rest; do
case $first in
*:)
dev=$second
;;
*)
if [ "$second" = $mac ]; then
echo ${dev%:}
return
fi
esac
done
}
#
# Find interface address--returns the first IP address assigned to the passed
# device
#
find_first_interface_address() # $1 = interface
{
#
# get the line of output containing the first IP address
#
addr=$(ip -f inet addr show $1 2> /dev/null | grep 'inet .* global' | head -n1)
#
# If there wasn't one, bail out now
#
[ -n "$addr" ] || fatal_error "Can't determine the IP address of $1"
#
# Strip off the trailing VLSM mask (or the peer IP in case of a P-t-P link)
# along with everything else on the line
#
echo $addr | sed 's/\s*inet //;s/\/.*//;s/ peer.*//'
}
find_first_interface_address_if_any() # $1 = interface
{
#
# get the line of output containing the first IP address
#
addr=$(ip -f inet addr show $1 2> /dev/null | grep 'inet .* global' | head -n1)
#
# Strip off the trailing VLSM mask (or the peer IP in case of a P-t-P link)
# along with everything else on the line
#
[ -n "$addr" ] && echo $addr | sed 's/\s*inet //;s/\/.*//;s/ peer.*//' || echo 0.0.0.0
}
#
# Internal version of 'which'
#
mywhich() {
local dir
for dir in $(split $PATH); do
if [ -x $dir/$1 ]; then
echo $dir/$1
return 0
fi
done
return 2
}
#
# Set default config path
#
ensure_config_path() {
local F
F=${SHAREDIR}/configpath
if [ -z "$CONFIG_PATH" ]; then
[ -f $F ] || { echo " ERROR: $F does not exist"; exit 2; }
. $F
fi
if [ -n "$SHOREWALL_DIR" ]; then
[ "${CONFIG_PATH%%:*}" = "$SHOREWALL_DIR" ] || CONFIG_PATH=$SHOREWALL_DIR:$CONFIG_PATH
fi
}
#
# Find a File -- For relative file name, look in each ${CONFIG_PATH} then ${CONFDIR}
#
find_file()
{
local saveifs
saveifs=
local directory
case $1 in
/*)
echo $1
;;
*)
for directory in $(split $CONFIG_PATH); do
if [ -f $directory/$1 ]; then
echo $directory/$1
return
fi
done
echo ${CONFDIR}/$1
;;
esac
}
#
# Get fully-qualified name of file
#
resolve_file() # $1 = file name
{
local pwd
pwd=$PWD
case $1 in
/*)
echo $1
;;
.)
echo $pwd
;;
./*)
echo ${pwd}${1#.}
;;
..)
cd ..
echo $PWD
cd $pwd
;;
../*)
cd ..
resolve_file ${1#../}
cd $pwd
;;
*)
echo $pwd/$1
;;
esac
}
#
# Perform variable substitution on the passed argument and echo the result
#
expand() # $@ = contents of variable which may be the name of another variable
{
eval echo \"$@\"
}
#
# Function for including one file into another
#
INCLUDE() {
. $(find_file $(expand $@))
}
#
# Set the Shorewall state
#
set_state () # $1 = state
{
echo "$1 ($(date))" > ${VARDIR}/state
}
#
# 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
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=
CONNMARK=
XCONNMARK=
CONNMARK_MATCH=
XCONNMARK_MATCH=
RAW_TABLE=
IPP2P_MATCH=
OLD_IPP2P_MATCH=
LENGTH_MATCH=
CLASSIFY_TARGET=
ENHANCED_REJECT=
USEPKTTYPE=
KLUDGEFREE=
MARK=
XMARK=
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=
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; 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
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 -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 --set $chain src -j ACCEPT; then
qt $IPTABLES -D $chain -m set --set $chain src -j ACCEPT
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 $chain --hashlimit-mode dstip -j ACCEPT && NEW_HL_MATCH=Yes
HASHLIMIT_MATCH=$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 -F $chain
qt $IPTABLES -X $chain
qt $IPTABLES -F $chain1
qt $IPTABLES -X $chain1
CAPVERSION=$SHOREWALL_CAPVERSION
}
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 [ $VERBOSE -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
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
report_capability "Ipset Match" $IPSET_MATCH
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" $IPP2P_MATCH
[ -n "$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
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
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" $PERSISTENT_SNAT
fi
[ -n "$PKTTYPE" ] || USEPKTTYPE=
}
report_capabilities1() {
report_capability1() # $1 = Capability
{
eval echo $1=\$$1
}
echo "#"
echo "# Shorewall $VERSION detected the following iptables/netfilter capabilities - $(date)"
echo "#"
report_capability1 NAT_ENABLED
report_capability1 MANGLE_ENABLED
report_capability1 MULTIPORT
report_capability1 XMULTIPORT
report_capability1 CONNTRACK_MATCH
report_capability1 NEW_CONNTRACK_MATCH
report_capability1 OLD_CONNTRACK_MATCH
report_capability1 USEPKTTYPE
report_capability1 POLICY_MATCH
report_capability1 PHYSDEV_MATCH
report_capability1 PHYSDEV_BRIDGE
report_capability1 LENGTH_MATCH
report_capability1 IPRANGE_MATCH
report_capability1 RECENT_MATCH
report_capability1 OWNER_MATCH
report_capability1 IPSET_MATCH
report_capability1 CONNMARK
report_capability1 XCONNMARK
report_capability1 CONNMARK_MATCH
report_capability1 XCONNMARK_MATCH
report_capability1 RAW_TABLE
report_capability1 IPP2P_MATCH
report_capability1 OLD_IPP2P_MATCH
report_capability1 CLASSIFY_TARGET
report_capability1 ENHANCED_REJECT
report_capability1 KLUDGEFREE
report_capability1 MARK
report_capability1 XMARK
report_capability1 MANGLE_FORWARD
report_capability1 COMMENTS
report_capability1 ADDRTYPE
report_capability1 TCPMSS_MATCH
report_capability1 HASHLIMIT_MATCH
report_capability1 OLD_HL_MATCH
report_capability1 NFQUEUE_TARGET
report_capability1 REALM_MATCH
report_capability1 HELPER_MATCH
report_capability1 CONNLIMIT_MATCH
report_capability1 TIME_MATCH
report_capability1 GOTO_TARGET
report_capability1 LOGMARK_TARGET
report_capability1 IPMARK_TARGET
report_capability1 LOG_TARGET
report_capability1 PERSISTENT_SNAT
echo CAPVERSION=$SHOREWALL_CAPVERSION
}
# Function to truncate a string -- It uses 'cut -b -<n>'
# rather than ${v:first:last} because light-weight shells like ash and
# dash do not support that form of expansion.
#
truncate() # $1 = length
{
cut -b -${1}
}
#
# Determine how to do "echo -e"
#
find_echo() {
local result
result=$(echo "a\tb")
[ ${#result} -eq 3 ] && { echo echo; return; }
result=$(echo -e "a\tb")
[ ${#result} -eq 3 ] && { echo "echo -e"; return; }
result=$(which echo)
[ -n "$result" ] && { echo "$result -e"; return; }
echo echo
}
# Determine which version of mktemp is present (if any) and set MKTEMP accortingly:
#
# None - No mktemp
# BSD - BSD mktemp (Mandrake)
# STD - mktemp.org mktemp
#
find_mktemp() {
local mktemp
mktemp=`mywhich mktemp 2> /dev/null`
if [ -n "$mktemp" ]; then
if qt mktemp -V ; then
MKTEMP=STD
else
MKTEMP=BSD
fi
else
MKTEMP=None
fi
}
#
# create a temporary file. If a directory name is passed, the file will be created in
# that directory. Otherwise, it will be created in a temporary directory.
#
mktempfile() {
[ -z "$MKTEMP" ] && find_mktemp
if [ $# -gt 0 ]; then
case "$MKTEMP" in
BSD)
mktemp $1/shorewall.XXXXXX
;;
STD)
mktemp -p $1 shorewall.XXXXXX
;;
None)
> $1/shorewall-$$ && echo $1/shorewall-$$
;;
*)
error_message "ERROR:Internal error in mktempfile"
;;
esac
else
case "$MKTEMP" in
BSD)
mktemp /tmp/shorewall.XXXXXX
;;
STD)
mktemp -t shorewall.XXXXXX
;;
None)
rm -f /tmp/shorewall-$$
> /tmp/shorewall-$$ && echo /tmp/shorewall-$$
;;
*)
error_message "ERROR:Internal error in mktempfile"
;;
esac
fi
}
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