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Add new capability for persistent SNAT

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This commit is contained in:
Tom Eastep 2009-08-15 08:35:54 -07:00
parent 55f75604b3
commit c908edab34
5 changed files with 38 additions and 9 deletions
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12
Shorewall/Perl/Shorewall/Config.pm
View File

@ -241,6 +241,7 @@ our %capdesc = ( NAT_ENABLED => 'NAT',
LOG_TARGET => 'LOG Target',
LOGMARK_TARGET => 'LOGMARK Target',
IPMARK_TARGET => 'IPMARK Target',
PERSISTENT_SNAT => 'Persistent SNAT',
CAPVERSION => 'Capability Version',
);
#
@ -328,7 +329,7 @@ sub initialize( $ ) {
EXPORT => 0,
UNTRACKED => 0,
VERSION => "4.4.1",
CAPVERSION => 40310 ,
CAPVERSION => 40401 ,
);
#
@ -613,6 +614,7 @@ sub initialize( $ ) {
LOGMARK_TARGET => undef,
IPMARK_TARGET => undef,
LOG_TARGET => 1, # Assume that we have it.
PERSISTENT_SNAT => undef,
CAPVERSION => undef,
);
#
@ -1923,6 +1925,14 @@ sub determine_capabilities( $ ) {
$capabilities{NAT_ENABLED} = qt1( "$iptables -t nat -L -n" ) if $family == F_IPV4;
if ( $capabilities{NAT_ENABLED} ) {
if ( qt1( "$iptables -t nat -N $sillyname" ) ) {
$capabilities{PERSISTENT_SNAT} = qt1( "$iptables -t nat -A $sillyname -j SNAT --to source 1.2.3.4 --persistent" );
qt1( "$iptables -t NAT -F $sillyname" );
qt1( "$iptables -t NAT -X $sillyname" );
}
}
$capabilities{MANGLE_ENABLED} = qt1( "$iptables -t mangle -L -n" );
qt1( "$iptables -N $sillyname" );

2
Shorewall/Perl/Shorewall/Nat.pm
View File

@ -225,6 +225,8 @@ sub process_one_masq( )
$addresses =~ s/:persistent$// and $persistent = '--persistent ';
$addresses =~ s/:random$// and $randomize = '--random ';
require_capability 'PERSISTENT_SNAT', ':random', 's' if $randomize;
if ( $addresses =~ /^SAME/ ) {
fatal_error "The SAME target is no longer supported";
} elsif ( $addresses eq 'detect' ) {

23
Shorewall/lib.base
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@ -30,7 +30,7 @@
#
SHOREWALL_LIBVERSION=40000
SHOREWALL_CAPVERSION=40310
SHOREWALL_CAPVERSION=40401
[ -n "${VARDIR:=/var/lib/shorewall}" ]
[ -n "${SHAREDIR:=/usr/share/shorewall}" ]
@ -777,6 +777,13 @@ set_state () # $1 = state
# Determine which optional facilities are supported by iptables/netfilter
#
determine_capabilities() {
[ -n "$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=
@ -820,14 +827,16 @@ determine_capabilities() {
LOGMARK_TARGET=
IPMARK_TARGET=
LOG_TARGET=Yes
PERSISTENT_SNAT=
chain=fooX$$
[ -n "$IPTABLES" ] || IPTABLES=$(mywhich iptables)
if [ -z "$IPTABLES" ]; then
echo " ERROR: No executable iptables binary can be found on your PATH" >&2
exit 1
if [ -n "$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
$IPTABLES -t nat -F $chain
$IPTABLES -t nat -X $chain
fi
fi
qt $IPTABLES -F $chain
@ -1011,6 +1020,7 @@ report_capabilities() {
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=
@ -1068,6 +1078,7 @@ report_capabilities1() {
report_capability1 LOGMARK_TARGET
report_capability1 IPMARK_TARGET
report_capability1 LOG_TARGET
report_capability1 PERSISTENT_SNAT
echo CAPVERSION=$SHOREWALL_CAPVERSION
}

8
Shorewall/releasenotes.txt
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@ -179,7 +179,13 @@ None.
Example:
#INTERFACE SOURCE ADDRESS
eth0 0.0.0.0/0 206.124.146.177-206.124.146.179:persistent
eth0 0.0.0.0/0 206.124.146.177-206.124.146.179:persistent
This feature requires Persistent SNAT support in your kernel and
iptables.
If you use a capabilities file, you will need to create a new one
as a result of this feature.
----------------------------------------------------------------------------
N E W F E A T U R E S I N 4 . 4

2
Shorewall6/lib.base
View File

@ -33,7 +33,7 @@
#
SHOREWALL_LIBVERSION=40300
SHOREWALL_CAPVERSION=40310
SHOREWALL_CAPVERSION=40401
[ -n "${VARDIR:=/var/lib/shorewall6}" ]
[ -n "${SHAREDIR:=/usr/share/shorewall6}" ]