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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8954 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep 2008-12-09 01:59:27 +00:00
parent 65745cd6a2
commit aadf5e41c6
4 changed files with 948 additions and 47 deletions
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4
Shorewall-perl/Shorewall/Config.pm
View File

@ -253,8 +253,8 @@ our $Product;
use constant { MIN_VERBOSITY => -1,
MAX_VERBOSITY => 2 ,
F_IPV4 => 1,
F_IPV6 => 2,
F_IPV4 => 4,
F_IPV6 => 6,
};
#

18
Shorewall-perl/Shorewall/IPAddrs.pm
View File

@ -34,6 +34,15 @@ use strict;
our @ISA = qw(Exporter);
our @EXPORT = qw( ALLIPv4
ALLIPv6
IPv6_MULTICAST
IPv6_LINKLOCAL
IPv6_SITELOCAL
IPv6_LINKLOCAL
IPv6_LOOPBACK
IPv6_LINK_ALLNODES
IPv6_LINK_ALLRTRS
IPv6_SITE_ALLNODES
IPv6_SITE_ALLRTRS
ALLIP
ALL
TCP
@ -73,6 +82,15 @@ our $family;
use constant { ALLIPv4 => '0.0.0.0/0' ,
ALLIPv6 => '::/0' ,
IPv6_MULTICAST => 'FF00::/10' ,
IPv6_LINKLOCAL => 'FF80::/10' ,
IPv6_SITELOCAL => 'FFC0::/10' ,
IPv6_LINKLOCAL => 'FF80::/10' ,
IPv6_LOOPBACK => '::1' ,
IPv6_LINK_ALLNODES => 'FF01::1' ,
IPv6_LINK_ALLRTRS => 'FF01::2' ,
IPv6_SITE_ALLNODES => 'FF02::1' ,
IPv6_SITE_ALLRTRS => 'FF02::2' ,
ICMP => 1,
TCP => 6,
UDP => 17,

24
Shorewall-perl/Shorewall/Rules.pm
View File

@ -528,11 +528,11 @@ sub add_common_rules() {
setup_blacklist;
if ( $family == F_IPV4 ) {
$list = find_hosts_by_option 'nosmurfs';
$chainref = new_standard_chain 'smurfs';
if ( $family == F_IPV4 ) {
if ( $capabilities{ADDRTYPE} ) {
add_rule $chainref , '-s 0.0.0.0 -j RETURN';
add_rule_pair $chainref, '-m addrtype --src-type BROADCAST ', 'DROP', $config{SMURF_LOG_LEVEL} ;
@ -546,7 +546,6 @@ sub add_common_rules() {
}
add_rule_pair $chainref, '-s 224.0.0.0/4 ', 'DROP', $config{SMURF_LOG_LEVEL} ;
}
if ( $capabilities{ADDRTYPE} ) {
add_rule $rejectref , '-m addrtype --src-type BROADCAST -j DROP';
@ -559,6 +558,11 @@ sub add_common_rules() {
}
add_rule $rejectref , '-s 224.0.0.0/4 -j DROP';
} else {
my $predicate = '-s ' . IPv6_MULTICAST . ' ';
add_rule_pair $chainref , $predicate, 'DROP' , $config{SMURF_LOG_LEVEL};
add_rule $rejectref, "$predicate -j DROP";
}
if ( @$list ) {
progress_message2 'Adding Anti-smurf Rules';
@ -583,6 +587,7 @@ sub add_common_rules() {
add_rule $rejectref , '-j REJECT';
}
if ( $family == F_IPV4 ) {
$list = find_interfaces_by_option 'dhcp';
if ( @$list ) {
@ -597,7 +602,6 @@ sub add_common_rules() {
}
}
if ( $family == F_IPV4 ) {
$list = find_hosts_by_option 'norfc1918';
setup_rfc1918_filteration $list if @$list;
}
@ -799,7 +803,7 @@ sub setup_mac_lists( $ ) {
add_commands( $chainref,
"for address in $variable; do" );
if ( $family == F_IPV4 ) {
if ( $bridgeref->{broadcasts} ) {
for my $address ( @{$bridgeref->{broadcasts}}, '255.255.255.255' ) {
add_commands( $chainref ,
@ -814,9 +818,17 @@ sub setup_mac_lists( $ ) {
" done" );
}
add_commands( $chainref, " echo \"-A $chainref->{name} -s \$address -d 224.0.0.0/4 -j RETURN\" >&3" );
} else {
my $variable1 = get_interface_bcasts $bridge;
add_commands( $chainref,
" echo \"-A $chainref->{name} -s \$address -d 224.0.0.0/4 -j RETURN\" >&3",
'done' );
" for address1 in $variable1; do" ,
" echo \"-A $chainref->{name} -s \$address -d \$address1 -j RETURN\" >&3",
" done" );
}
add_command( $chainref, 'done' );
}
}

871
Shorewall-perl/prog.header6 Normal file
View File

@ -0,0 +1,871 @@
# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
# (c) 1999-2008 - 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 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/$(uname -r)/kernel/net/ipv6/netfilter:/lib/modules/$(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/ipv6/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
}
#
# 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
}
#
# Try to find the gateway through an interface looking for 'nexthop'
find_nexthop() # $1 = interface
{
echo $(find_gateway `ip -6 route list | grep "[[:space:]]nexthop.* $1"`)
}
#
# Find the default route's interface
#
find_default_interface() {
ip -6 route list | while read first rest; do
[ "$first" = default ] && echo $(find_device $rest) && return
done
}
#
# 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 $1 2> /dev/null | grep 'inet6 .* global' | head -n1)
#
# If there wasn't one, bail out now
#
[ -n "$addr" ] || fatal_error "Can't determine the IPv6 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
{
if interface_is_usable $2 ; then
qt ping -nc 1 -t 2 -I $2 $1
local result
result=$(ip neigh list | awk "/^$1 / {print \$5}")
case $result in
\<*\>)
;;
*)
[ -n "$result" ] && echo $result
;;
esac
fi
}
#
# 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
################################################################################