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Interface lists in masq and nat files
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8068 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep
parent
3eb254c0b6
commit
545dd7dbc3
@ -115,187 +115,189 @@ sub do_ipsec_options($)
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#
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sub setup_one_masq($$$$$$$)
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{
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my ($fullinterface, $networks, $addresses, $proto, $ports, $ipsec, $mark) = @_;
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my ($interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark) = @_;
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my $rule = '';
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my $pre_nat;
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my $add_snat_aliases = $config{ADD_SNAT_ALIASES};
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my $destnets = '';
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my $target = '-j MASQUERADE ';
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#
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# Handle IPSEC options, if any
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#
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if ( $ipsec ne '-' ) {
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fatal_error "Non-empty IPSEC column requires policy match support in your kernel and iptables" unless $globals{ORIGINAL_POLICY_MATCH};
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if ( $ipsec =~ /^yes$/i ) {
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$rule .= '-m policy --pol ipsec --dir out ';
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} elsif ( $ipsec =~ /^no$/i ) {
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$rule .= '-m policy --pol none --dir out ';
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} else {
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$rule .= do_ipsec_options $ipsec;
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}
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} elsif ( $capabilities{POLICY_MATCH} ) {
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$rule .= '-m policy --pol none --dir out ';
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}
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#
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# Leading '+'
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#
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$pre_nat = 1 if $fullinterface =~ s/^\+//;
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$pre_nat = 1 if $interfacelist =~ s/^\+//;
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#
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# Parse the remaining part of the INTERFACE column
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#
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if ( $fullinterface =~ /^([^:]+)::([^:]*)$/ ) {
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if ( $interfacelist =~ /^([^:]+)::([^:]*)$/ ) {
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$add_snat_aliases = 0;
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$destnets = $2;
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$fullinterface = $1;
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} elsif ( $fullinterface =~ /^([^:]+:[^:]+):([^:]+)$/ ) {
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$interfacelist = $1;
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} elsif ( $interfacelist =~ /^([^:]+:[^:]+):([^:]+)$/ ) {
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$destnets = $2;
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$fullinterface = $1;
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} elsif ( $fullinterface =~ /^([^:]+):$/ ) {
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$interfacelist = $1;
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} elsif ( $interfacelist =~ /^([^:]+):$/ ) {
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$add_snat_aliases = 0;
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$fullinterface = $1;
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} elsif ( $fullinterface =~ /^([^:]+):([^:]*)$/ ) {
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$interfacelist = $1;
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} elsif ( $interfacelist =~ /^([^:]+):([^:]*)$/ ) {
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my ( $one, $two ) = ( $1, $2 );
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if ( $2 =~ /\./ ) {
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$fullinterface = $one;
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$interfacelist = $one;
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$destnets = $two;
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}
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}
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#
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# Isolate and verify the interface part
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#
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( my $interface = $fullinterface ) =~ s/:.*//;
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if ( $interface =~ /(.*)[(](\w*)[)]$/ ) {
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$interface = $1;
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my $realm = $2;
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$fullinterface =~ s/[(]\w*[)]//;
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$realm = lookup_provider( $realm ) unless $realm =~ /^\d+$/;
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$rule .= "-m realm --realm $realm ";
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}
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fatal_error "Unknown interface ($interface)" unless find_interface( $interface )->{root};
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my $chainref = ensure_chain('nat', $pre_nat ? snat_chain $interface : masq_chain $interface);
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#
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# If there is no source or destination then allow all addresses
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#
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$networks = ALLIPv4 if $networks eq '-';
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$destnets = ALLIPv4 if $destnets eq '-';
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#
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# Handle Protocol and Ports
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#
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$rule .= do_proto $proto, $ports, '';
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#
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# Handle Mark
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#
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$rule .= do_test( $mark, 0xFF) if $mark ne '-';
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my $detectaddress = 0;
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my $exceptionrule = '';
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my $randomize = '';
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#
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# Parse the ADDRESSES column
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#
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if ( $addresses ne '-' ) {
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if ( $addresses eq 'random' ) {
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$randomize = '--random ';
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} else {
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$addresses =~ s/:random$// and $randomize = '--random ';
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for my $fullinterface (split /,/, $interfacelist ) {
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my $rule = '';
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my $target = '-j MASQUERADE ';
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#
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# Isolate and verify the interface part
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#
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( my $interface = $fullinterface ) =~ s/:.*//;
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if ( $addresses =~ /^SAME:nodst:/ ) {
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fatal_error "':random' is not supported by the SAME target" if $randomize;
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$target = '-j SAME --nodst ';
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$addresses =~ s/.*://;
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for my $addr ( split /,/, $addresses ) {
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$target .= "--to $addr ";
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}
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} elsif ( $addresses =~ /^SAME:/ ) {
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fatal_error "':random' is not supported by the SAME target" if $randomize;
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$target = '-j SAME ';
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$addresses =~ s/.*://;
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for my $addr ( split /,/, $addresses ) {
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$target .= "--to $addr ";
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}
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} elsif ( $addresses eq 'detect' ) {
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my $variable = get_interface_address $interface;
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$target = "-j SNAT --to-source $variable";
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if ( interface_is_optional $interface ) {
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add_commands( $chainref,
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'',
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"if [ \"$variable\" != 0.0.0.0 ]; then" );
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incr_cmd_level( $chainref );
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$detectaddress = 1;
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}
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if ( $interface =~ /(.*)[(](\w*)[)]$/ ) {
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$interface = $1;
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my $realm = $2;
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$fullinterface =~ s/[(]\w*[)]//;
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$realm = lookup_provider( $realm ) unless $realm =~ /^\d+$/;
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$rule .= "-m realm --realm $realm ";
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}
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fatal_error "Unknown interface ($interface)" unless find_interface( $interface )->{root};
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my $chainref = ensure_chain('nat', $pre_nat ? snat_chain $interface : masq_chain $interface);
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#
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# Handle IPSEC options, if any
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#
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if ( $ipsec ne '-' ) {
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fatal_error "Non-empty IPSEC column requires policy match support in your kernel and iptables" unless $globals{ORIGINAL_POLICY_MATCH};
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if ( $ipsec =~ /^yes$/i ) {
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$rule .= '-m policy --pol ipsec --dir out ';
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} elsif ( $ipsec =~ /^no$/i ) {
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$rule .= '-m policy --pol none --dir out ';
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} else {
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my $addrlist = '';
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for my $addr ( split /,/, $addresses ) {
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if ( $addr =~ /^.*\..*\..*\./ ) {
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$target = '-j SNAT ';
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$addrlist .= "--to-source $addr ";
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$exceptionrule = do_proto( $proto, '', '' ) if $addr =~ /:/;
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} else {
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$addr =~ s/^://;
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$addrlist .= "--to-ports $addr ";
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$exceptionrule = do_proto( $proto, '', '' );
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}
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}
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$rule .= do_ipsec_options $ipsec;
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}
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} elsif ( $capabilities{POLICY_MATCH} ) {
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$rule .= '-m policy --pol none --dir out ';
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}
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#
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# Handle Protocol and Ports
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#
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$rule .= do_proto $proto, $ports, '';
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#
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# Handle Mark
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#
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$rule .= do_test( $mark, 0xFF) if $mark ne '-';
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my $detectaddress = 0;
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my $exceptionrule = '';
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my $randomize = '';
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#
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# Parse the ADDRESSES column
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#
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if ( $addresses ne '-' ) {
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if ( $addresses eq 'random' ) {
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$randomize = '--random ';
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} else {
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$addresses =~ s/:random$// and $randomize = '--random ';
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$target .= $addrlist;
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if ( $addresses =~ /^SAME:nodst:/ ) {
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fatal_error "':random' is not supported by the SAME target" if $randomize;
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$target = '-j SAME --nodst ';
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$addresses =~ s/.*://;
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for my $addr ( split /,/, $addresses ) {
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$target .= "--to $addr ";
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}
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} elsif ( $addresses =~ /^SAME:/ ) {
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fatal_error "':random' is not supported by the SAME target" if $randomize;
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$target = '-j SAME ';
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$addresses =~ s/.*://;
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for my $addr ( split /,/, $addresses ) {
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$target .= "--to $addr ";
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}
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} elsif ( $addresses eq 'detect' ) {
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my $variable = get_interface_address $interface;
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$target = "-j SNAT --to-source $variable";
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if ( interface_is_optional $interface ) {
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add_commands( $chainref,
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'',
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"if [ \"$variable\" != 0.0.0.0 ]; then" );
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incr_cmd_level( $chainref );
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$detectaddress = 1;
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}
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} else {
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my $addrlist = '';
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for my $addr ( split /,/, $addresses ) {
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if ( $addr =~ /^.*\..*\..*\./ ) {
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$target = '-j SNAT ';
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$addrlist .= "--to-source $addr ";
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$exceptionrule = do_proto( $proto, '', '' ) if $addr =~ /:/;
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} else {
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$addr =~ s/^://;
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$addrlist .= "--to-ports $addr ";
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$exceptionrule = do_proto( $proto, '', '' );
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}
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}
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$target .= $addrlist;
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}
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}
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$target .= $randomize;
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} else {
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$add_snat_aliases = 0;
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}
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$target .= $randomize;
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} else {
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$add_snat_aliases = 0;
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}
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#
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# And Generate the Rule(s)
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#
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expand_rule( $chainref ,
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POSTROUTE_RESTRICT ,
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$rule ,
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$networks ,
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$destnets ,
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'' ,
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$target ,
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'' ,
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'' ,
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$exceptionrule );
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if ( $detectaddress ) {
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decr_cmd_level( $chainref );
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add_command( $chainref , 'fi' );
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}
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if ( $add_snat_aliases ) {
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my ( $interface, $alias , $remainder ) = split( /:/, $fullinterface, 3 );
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fatal_error "Invalid alias ($alias:$remainder)" if defined $remainder;
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for my $address ( split /,/, $addresses ) {
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my ( $addrs, $port ) = split /:/, $address;
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next unless $addrs;
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next if $addrs eq 'detect';
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for my $addr ( ip_range_explicit $addrs ) {
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unless ( $addresses_to_add{$addr} ) {
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emit "del_ip_addr $addr $interface" unless $config{RETAIN_ALIASES};
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$addresses_to_add{$addr} = 1;
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if ( defined $alias ) {
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push @addresses_to_add, $addr, "$interface:$alias";
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$alias++;
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} else {
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push @addresses_to_add, $addr, $interface;
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#
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# And Generate the Rule(s)
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#
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expand_rule( $chainref ,
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POSTROUTE_RESTRICT ,
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$rule ,
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$networks ,
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$destnets ,
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'' ,
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$target ,
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'' ,
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'' ,
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$exceptionrule );
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if ( $detectaddress ) {
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decr_cmd_level( $chainref );
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add_command( $chainref , 'fi' );
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}
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if ( $add_snat_aliases ) {
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my ( $interface, $alias , $remainder ) = split( /:/, $fullinterface, 3 );
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fatal_error "Invalid alias ($alias:$remainder)" if defined $remainder;
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for my $address ( split /,/, $addresses ) {
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my ( $addrs, $port ) = split /:/, $address;
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next unless $addrs;
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next if $addrs eq 'detect';
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for my $addr ( ip_range_explicit $addrs ) {
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unless ( $addresses_to_add{$addr} ) {
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emit "del_ip_addr $addr $interface" unless $config{RETAIN_ALIASES};
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$addresses_to_add{$addr} = 1;
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if ( defined $alias ) {
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push @addresses_to_add, $addr, "$interface:$alias";
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$alias++;
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} else {
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push @addresses_to_add, $addr, $interface;
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}
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}
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}
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}
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}
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}
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progress_message " Masq record \"$currentline\" $done";
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}
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@ -399,7 +401,6 @@ sub do_one_nat( $$$$$ )
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}
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}
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progress_message " NAT entry \"$currentline\" $done";
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}
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#
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@ -413,12 +414,20 @@ sub setup_nat() {
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while ( read_a_line ) {
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my ( $external, $interface, $internal, $allints, $localnat ) = split_line1 3, 5, 'nat file';
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my ( $external, $interfacelist, $internal, $allints, $localnat ) = split_line1 3, 5, 'nat file';
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if ( $external eq 'COMMENT' ) {
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process_comment;
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} else {
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do_one_nat $external, $interface, $internal, $allints, $localnat;
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( $interfacelist, my $digit ) = split /:/, $interfacelist;
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$digit = defined $digit ? ":$digit" : '';
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for my $interface ( split /,/, $interfacelist ) {
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do_one_nat $external, "${interface}${digit}", $internal, $allints, $localnat;
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}
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progress_message " NAT entry \"$currentline\" $done";
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}
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}
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