mirror of
https://gitlab.com/shorewall/code.git
synced 2024-12-21 22:01:57 +01:00
e1c1468e82
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8485 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
1022 lines
21 KiB
Plaintext
1022 lines
21 KiB
Plaintext
# 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)
|
|
#
|
|
# Options are:
|
|
#
|
|
# -n Don't alter Routing
|
|
# -v and -q Standard Shorewall Verbosity control
|
|
#
|
|
# Commands are:
|
|
#
|
|
# start Starts the firewall
|
|
# refresh Refresh the firewall
|
|
# restart Restarts the firewall
|
|
# reload Reload the firewall
|
|
# clear Removes all firewall rules
|
|
# stop Stops the firewall
|
|
# status Displays firewall status
|
|
# version Displays the version of Shorewall that
|
|
# generated this program
|
|
#
|
|
################################################################################
|
|
# Functions imported from /usr/share/shorewall/lib.base
|
|
################################################################################
|
|
#
|
|
# 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
|
|
|
|
if [ $LOG_VERBOSE -gt 1 ]; then
|
|
timestamp="$(date +'%b %_d %T') "
|
|
echo "${timestamp}$@" >> $STARTUP_LOG
|
|
fi
|
|
}
|
|
|
|
progress_message2() # $* = Message
|
|
{
|
|
local timestamp
|
|
timestamp=
|
|
|
|
if [ $VERBOSE -gt 0 ]; then
|
|
[ -n "$TIMESTAMP" ] && timestamp="$(date +%H:%M:%S) "
|
|
echo "${timestamp}$@"
|
|
fi
|
|
|
|
if [ $LOG_VERBOSE -gt 0 ]; then
|
|
timestamp="$(date +'%b %_d %T') "
|
|
echo "${timestamp}$@" >> $STARTUP_LOG
|
|
fi
|
|
}
|
|
|
|
progress_message3() # $* = Message
|
|
{
|
|
local timestamp
|
|
timestamp=
|
|
|
|
if [ $VERBOSE -ge 0 ]; then
|
|
[ -n "$TIMESTAMP" ] && timestamp="$(date +%H:%M:%S) "
|
|
echo "${timestamp}$@"
|
|
fi
|
|
|
|
if [ $LOG_VERBOSE -ge 0 ]; then
|
|
timestamp="$(date +'%b %_d %T') "
|
|
echo "${timestamp}$@" >> $STARTUP_LOG
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Split a colon-separated list into a space-separated list
|
|
#
|
|
split() {
|
|
local ifs
|
|
ifs=$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$1" ] && return 0
|
|
done
|
|
|
|
return 1
|
|
}
|
|
|
|
#
|
|
# Suppress all output for a command
|
|
#
|
|
qt()
|
|
{
|
|
"$@" >/dev/null 2>&1
|
|
}
|
|
|
|
qt1()
|
|
{
|
|
local status
|
|
|
|
while [ 1 ]; do
|
|
"$@" >/dev/null 2>&1
|
|
status=$?
|
|
[ $status -ne 4 ] && return $status
|
|
done
|
|
}
|
|
|
|
#
|
|
# Determine if Shorewall is "running"
|
|
#
|
|
shorewall_is_started() {
|
|
qt1 $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
|
|
}
|
|
|
|
#
|
|
# Set a standard chain's policy
|
|
#
|
|
setpolicy() # $1 = name of chain, $2 = policy
|
|
{
|
|
run_iptables -P $1 $2
|
|
}
|
|
|
|
#
|
|
# Set a standard chain to enable established and related connections
|
|
#
|
|
setcontinue() # $1 = name of chain
|
|
{
|
|
run_iptables -A $1 -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
}
|
|
|
|
#
|
|
# Flush one of the NAT table chains
|
|
#
|
|
flushnat() # $1 = name of chain
|
|
{
|
|
run_iptables -t nat -F $1
|
|
}
|
|
|
|
#
|
|
# Flush one of the Mangle table chains
|
|
#
|
|
flushmangle() # $1 = name of chain
|
|
{
|
|
run_iptables -t mangle -F $1
|
|
}
|
|
|
|
#
|
|
# Flush and delete all user-defined chains in the filter table
|
|
#
|
|
deleteallchains() {
|
|
run_iptables -F
|
|
run_iptables -X
|
|
}
|
|
|
|
#
|
|
# 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 $DONT_LOAD $MODULES; 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
|
|
|
|
if ! qt mywhich modprobe; then
|
|
moduleloader=insmod
|
|
fi
|
|
|
|
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
|
|
|
|
[ -z "$MODULESDIR" ] && MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv4/netfilter:/lib/modules/$(uname -r)/kernel/net/netfilter
|
|
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=${1:-Yes} # So old compiled scripts still work
|
|
|
|
if ! qt mywhich modprobe; then
|
|
moduleloader=insmod
|
|
fi
|
|
|
|
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
|
|
|
|
[ -z "$MODULESDIR" ] && \
|
|
MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv4/netfilter:/lib/modules/$(uname -r)/kernel/net/netfilter
|
|
|
|
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
|
|
}
|
|
|
|
#
|
|
# 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='<<'
|
|
|
|
#
|
|
# 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 $y
|
|
}
|
|
|
|
#
|
|
# Netmask from CIDR
|
|
#
|
|
ip_netmask() {
|
|
local vlsm
|
|
vlsm=${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)
|
|
#
|
|
# Use string comparison to work around a broken BusyBox ash in OpenWRT
|
|
#
|
|
test $(( $(decodeaddr $1) & $netmask)) = $(( $(decodeaddr ${2%/*}) & $netmask ))
|
|
}
|
|
|
|
#
|
|
# Query NetFilter about the existence of a filter chain
|
|
#
|
|
chain_exists() # $1 = chain name
|
|
{
|
|
qt1 $IPTABLES -L $1 -n
|
|
}
|
|
|
|
#
|
|
# Find the value 'dev' in the passed arguments then echo the next value
|
|
#
|
|
|
|
find_device() {
|
|
while [ $# -gt 1 ]; do
|
|
[ "x$1" = xdev ] && echo $2 && return
|
|
shift
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find the value 'via' in the passed arguments then echo the next value
|
|
#
|
|
|
|
find_gateway() {
|
|
while [ $# -gt 1 ]; do
|
|
[ "x$1" = xvia ] && echo $2 && return
|
|
shift
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find the value 'mtu' in the passed arguments then echo the next value
|
|
#
|
|
|
|
find_mtu() {
|
|
while [ $# -gt 1 ]; do
|
|
[ "x$1" = xmtu ] && echo $2 && return
|
|
shift
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find the value 'peer' in the passed arguments then echo the next value up to
|
|
# "/"
|
|
#
|
|
|
|
find_peer() {
|
|
while [ $# -gt 1 ]; do
|
|
[ "x$1" = xpeer ] && echo ${2%/*} && return
|
|
shift
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find the interfaces that have a route to the passed address - the default
|
|
# route is not used.
|
|
#
|
|
|
|
find_rt_interface() {
|
|
ip route list | while read addr rest; do
|
|
case $addr in
|
|
*/*)
|
|
in_network ${1%/*} $addr && echo $(find_device $rest)
|
|
;;
|
|
default)
|
|
;;
|
|
*)
|
|
if [ "$addr" = "$1" -o "$addr/32" = "$1" ]; then
|
|
echo $(find_device $rest)
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
#
|
|
# Try to find the gateway through an interface looking for 'nexthop'
|
|
|
|
find_nexthop() # $1 = interface
|
|
{
|
|
echo $(find_gateway `ip route list | grep "[[:space:]]nexthop.* $1"`)
|
|
}
|
|
|
|
#
|
|
# Find the default route's interface
|
|
#
|
|
find_default_interface() {
|
|
ip route list | while read first rest; do
|
|
[ "$first" = default ] && echo $(find_device $rest) && return
|
|
done
|
|
}
|
|
|
|
#
|
|
# Echo the name of the interface(s) that will be used to send to the
|
|
# passed address
|
|
#
|
|
|
|
find_interface_by_address() {
|
|
local dev
|
|
dev="$(find_rt_interface $1)"
|
|
local first
|
|
local rest
|
|
|
|
[ -z "$dev" ] && dev=$(find_default_interface)
|
|
|
|
[ -n "$dev" ] && echo $dev
|
|
}
|
|
|
|
#
|
|
# 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 ${dev%:}
|
|
return
|
|
fi
|
|
esac
|
|
done
|
|
}
|
|
|
|
#
|
|
# Determine if Interface is up
|
|
#
|
|
interface_is_up() {
|
|
[ -n "$(ip link list dev $1 2> /dev/null | grep -e '[<,]UP[,>]')" ]
|
|
}
|
|
|
|
#
|
|
# 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
|
|
}
|
|
|
|
#
|
|
# Determine if interface is usable from a Netfilter prespective
|
|
#
|
|
interface_is_usable() # $1 = interface
|
|
{
|
|
interface_is_up $1 && [ "$(find_first_interface_address_if_any $1)" != 0.0.0.0 ] && run_isusable_exit $1
|
|
}
|
|
|
|
#
|
|
# Find interface addresses--returns the set of addresses assigned to the passed
|
|
# device
|
|
#
|
|
find_interface_addresses() # $1 = interface
|
|
{
|
|
ip -f inet addr show $1 2> /dev/null | grep inet\ | sed 's/\s*inet //;s/\/.*//;s/ peer.*//'
|
|
}
|
|
|
|
#
|
|
# echo the list of networks routed out of a given interface
|
|
#
|
|
get_routed_networks() # $1 = interface name, $2-n = Fatal error message
|
|
{
|
|
local address
|
|
local rest
|
|
|
|
ip route show dev $1 2> /dev/null |
|
|
while read address rest; do
|
|
case "$address" in
|
|
default)
|
|
if [ $# -gt 1 ]; then
|
|
shift
|
|
fatal_error "$@"
|
|
else
|
|
echo "WARNING: default route ignored on interface $1" >&2
|
|
fi
|
|
;;
|
|
multicast|broadcast|prohibit|nat|throw|nexthop)
|
|
;;
|
|
*)
|
|
[ "$address" = "${address%/*}" ] && address="${address}/32"
|
|
echo $address
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
get_interface_bcasts() # $1 = interface
|
|
{
|
|
local addresses
|
|
addresses=
|
|
|
|
ip -f inet addr show dev $1 2> /dev/null | grep 'inet.*brd' | sed 's/inet.*brd //; s/scope.*//;' | sort -u
|
|
}
|
|
|
|
#
|
|
# 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
|
|
}
|
|
|
|
#
|
|
# 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
|
|
}
|
|
|
|
#
|
|
# Set the Shorewall state
|
|
#
|
|
set_state () # $1 = state
|
|
{
|
|
echo "$1 ($(date))" > ${VARDIR}/state
|
|
}
|
|
|
|
#
|
|
# 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 $@))
|
|
}
|
|
|
|
#
|
|
# Delete IP address
|
|
#
|
|
del_ip_addr() # $1 = address, $2 = interface
|
|
{
|
|
[ $(find_first_interface_address_if_any $2) = $1 ] || qt ip addr del $1 dev $2
|
|
}
|
|
|
|
# Add IP Aliases
|
|
#
|
|
add_ip_aliases() # $* = List of addresses
|
|
{
|
|
local local
|
|
local addresses
|
|
local external
|
|
local interface
|
|
local inet
|
|
local cidr
|
|
local rest
|
|
local val
|
|
local arping
|
|
arping=$(mywhich arping)
|
|
|
|
address_details()
|
|
{
|
|
#
|
|
# Folks feel uneasy if they don't see all of the same
|
|
# decoration on these IP addresses that they see when their
|
|
# distro's net config tool adds them. In an attempt to reduce
|
|
# the anxiety level, we have the following code which sets
|
|
# the VLSM and BRD from an existing address in the same networks
|
|
#
|
|
# Get all of the lines that contain inet addresses with broadcast
|
|
#
|
|
ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | while read inet cidr rest ; do
|
|
case $cidr in
|
|
*/*)
|
|
if in_network $external $cidr; then
|
|
echo "/${cidr#*/} brd $(broadcastaddress $cidr)"
|
|
break
|
|
fi
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
do_one()
|
|
{
|
|
val=$(address_details)
|
|
|
|
ip addr add ${external}${val} dev $interface $label
|
|
[ -n "$arping" ] && qt $arping -U -c 2 -I $interface $external
|
|
echo "$external $interface" >> $VARDIR/nat
|
|
[ -n "$label" ] && label="with $label"
|
|
progress_message " IP Address $external added to interface $interface $label"
|
|
}
|
|
|
|
progress_message "Adding IP Addresses..."
|
|
|
|
while [ $# -gt 0 ]; do
|
|
external=$1
|
|
interface=$2
|
|
label=
|
|
|
|
if [ "$interface" != "${interface%:*}" ]; then
|
|
label="${interface#*:}"
|
|
interface="${interface%:*}"
|
|
label="label $interface:$label"
|
|
fi
|
|
|
|
shift 2
|
|
|
|
list_search $external $(find_interface_addresses $interface) || do_one
|
|
done
|
|
}
|
|
|
|
detect_gateway() # $1 = interface
|
|
{
|
|
local interface
|
|
interface=$1
|
|
#
|
|
# First assume that this is some sort of point-to-point interface
|
|
#
|
|
gateway=$( find_peer $(ip addr list $interface ) )
|
|
#
|
|
# Maybe there's a default route through this gateway already
|
|
#
|
|
[ -n "$gateway" ] || gateway=$(find_gateway $(ip route list dev $interface))
|
|
#
|
|
# Last hope -- is there a load-balancing route through the interface?
|
|
#
|
|
[ -n "$gateway" ] || gateway=$(find_nexthop $interface)
|
|
#
|
|
# Be sure we found one
|
|
#
|
|
[ -n "$gateway" ] && echo $gateway
|
|
}
|
|
|
|
#
|
|
# Disable IPV6
|
|
#
|
|
disable_ipv6() {
|
|
local foo
|
|
foo="$(ip -f inet6 addr list 2> /dev/null)"
|
|
|
|
if [ -n "$foo" ]; then
|
|
if qt mywhich ip6tables; then
|
|
ip6tables -P FORWARD DROP
|
|
ip6tables -P INPUT DROP
|
|
ip6tables -P OUTPUT DROP
|
|
ip6tables -F
|
|
ip6tables -X
|
|
ip6tables -A OUTPUT -o lo -j ACCEPT
|
|
ip6tables -A INPUT -i lo -j ACCEPT
|
|
else
|
|
error_message "WARNING: DISABLE_IPV6=Yes in shorewall.conf but this system does not appear to have ip6tables"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# 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}
|
|
}
|
|
|
|
delete_tc1()
|
|
{
|
|
clear_one_tc() {
|
|
tc qdisc del dev $1 root 2> /dev/null
|
|
tc qdisc del dev $1 ingress 2> /dev/null
|
|
|
|
}
|
|
|
|
run_user_exit tcclear
|
|
|
|
run_ip link list | \
|
|
while read inx interface details; do
|
|
case $inx in
|
|
[0-9]*)
|
|
clear_one_tc ${interface%:}
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
#
|
|
# Detect a device's MTU -- echos the passed device's MTU
|
|
#
|
|
get_device_mtu() # $1 = device
|
|
{
|
|
local output
|
|
output="$(ip link list dev $1 2> /dev/null)" # quotes required for /bin/ash
|
|
|
|
if [ -n "$output" ]; then
|
|
echo $(find_mtu $output)
|
|
else
|
|
echo 1500
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Version of the above that doesn't generate any output for MTU 1500.
|
|
# Generates 'mtu <mtu+>' otherwise, where <mtu+> is the device's MTU + 100
|
|
#
|
|
get_device_mtu1() # $1 = device
|
|
{
|
|
local output
|
|
output="$(ip link list dev $1 2> /dev/null)" # quotes required for /bin/ash
|
|
local mtu
|
|
|
|
if [ -n "$output" ]; then
|
|
mtu=$(find_mtu $output)
|
|
if [ -n "$mtu" ]; then
|
|
[ $mtu = 1500 ] || echo mtu $(($mtu + 100))
|
|
fi
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# Undo changes to routing
|
|
#
|
|
undo_routing() {
|
|
|
|
if [ -z "$NOROUTES" ]; then
|
|
#
|
|
# Restore rt_tables database
|
|
#
|
|
if [ -f ${VARDIR}/rt_tables ]; then
|
|
[ -w /etc/iproute2/rt_table -a -z "$KEEP_RT_TABLES" ] && cp -f ${VARDIR}/rt_tables /etc/iproute2/ && progress_message "/etc/iproute2/rt_tables database restored"
|
|
rm -f ${VARDIR}/rt_tables
|
|
fi
|
|
#
|
|
# Restore the rest of the routing table
|
|
#
|
|
if [ -f ${VARDIR}/undo_routing ]; then
|
|
. ${VARDIR}/undo_routing
|
|
progress_message "Shorewall-generated routing tables and routing rules removed"
|
|
rm -f ${VARDIR}/undo_routing
|
|
fi
|
|
fi
|
|
|
|
}
|
|
|
|
restore_default_route() {
|
|
if [ -z "$NOROUTES" -a -f ${VARDIR}/default_route ]; then
|
|
local default_route
|
|
default_route=
|
|
local route
|
|
|
|
while read route ; do
|
|
case $route in
|
|
default*)
|
|
if [ -n "$default_route" ]; then
|
|
case "$default_route" in
|
|
*metric*)
|
|
#
|
|
# Don't restore a route with a metric -- we only replace the one with metric == 0
|
|
#
|
|
qt ip route delete default metric 0 && \
|
|
progress_message "Default Route with metric 0 deleted"
|
|
;;
|
|
*)
|
|
qt ip route replace $default_route && \
|
|
progress_message "Default Route (${default_route# }) restored"
|
|
;;
|
|
esac
|
|
|
|
break
|
|
fi
|
|
|
|
default_route="$default_route $route"
|
|
;;
|
|
*)
|
|
default_route="$default_route $route"
|
|
;;
|
|
esac
|
|
done < ${VARDIR}/default_route
|
|
|
|
rm -f ${VARDIR}/default_route
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Determine how to do "echo -e"
|
|
#
|
|
|
|
find_echo() {
|
|
local result
|
|
|
|
result=$(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 the MAC address of the passed IP through the passed interface
|
|
#
|
|
find_mac() # $1 = IP address, $2 = interface
|
|
{
|
|
qt ping -nc 1 -t 2 -I $2 $1
|
|
|
|
local result
|
|
result=$(arp -na | awk "/[(]$1[)].* $2$/ {print \$4}")
|
|
|
|
case $result in
|
|
\<*\>)
|
|
;;
|
|
*)
|
|
[ -n "$result" ] && echo $result
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Flush the conntrack table if $PURGE is non-empty
|
|
#
|
|
conditionally_flush_conntrack() {
|
|
|
|
if [ -n "$PURGE" ]; then
|
|
if [ -n $(which conntrack) ]; then
|
|
conntrack -F
|
|
else
|
|
error_message "WARNING: The '-p' option requires the conntrack utility which does not appear to be installed on this system"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
################################################################################
|
|
# End of functions imported from /usr/share/shorewall/lib.base
|
|
################################################################################
|