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https://gitlab.com/shorewall/code.git
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Preserve shell variables when converting masq -> snat
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
6398756647
commit
1b82dedb77
@ -175,6 +175,7 @@ our %EXPORT_TAGS = ( internal => [ qw( create_temp_script
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$doing
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$done
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$currentline
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$rawcurrentline
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$currentfilename
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$debug
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$file_format
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@ -60,12 +60,12 @@ sub initialize($) {
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#
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# Process a single rule from the the masq file
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#
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sub process_one_masq1( $$$$$$$$$$$$ )
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sub process_one_masq1( $$$$$$$$$$$ )
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{
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my ( $snat, $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) = @_;
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my ( $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) = @_;
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my $pre_nat;
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my $add_snat_aliases = ! $snat && $family == F_IPV4 && $config{ADD_SNAT_ALIASES};
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my $add_snat_aliases = $family == F_IPV4 && $config{ADD_SNAT_ALIASES};
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my $destnets = '';
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my $baserule = '';
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my $inlinematches = '';
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@ -226,7 +226,7 @@ sub process_one_masq1( $$$$$$$$$$$$ )
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} elsif ( $addresses eq 'NONAT' ) {
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fatal_error "'persistent' may not be specified with 'NONAT'" if $persistent;
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fatal_error "'random' may not be specified with 'NONAT'" if $randomize;
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$target = $snat ? 'CONTINUE' : 'RETURN';
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$target = 'RETURN';
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$add_snat_aliases = 0;
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} elsif ( $addresses ) {
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my $addrlist = '';
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@ -249,33 +249,31 @@ sub process_one_masq1( $$$$$$$$$$$$ )
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#
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$target = 'SNAT ';
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unless ( $snat ) {
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if ( $interface =~ /^{([a-zA-Z_]\w*)}$/ ) {
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if ( $interface =~ /^{([a-zA-Z_]\w*)}$/ ) {
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#
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# User-defined address variable
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#
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$conditional = conditional_rule( $chainref, $addr );
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$addrlist .= '--to-source ' . "\$${1}${ports} ";
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} else {
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if ( $conditional = conditional_rule( $chainref, $addr ) ) {
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#
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# User-defined address variable
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# Optional Interface -- rule is conditional
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#
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$conditional = conditional_rule( $chainref, $addr );
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$addrlist .= '--to-source ' . "\$${1}${ports} ";
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$addr = get_interface_address $interface;
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} else {
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if ( $conditional = conditional_rule( $chainref, $addr ) ) {
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#
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# Optional Interface -- rule is conditional
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#
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$addr = get_interface_address $interface;
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} else {
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#
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# Interface is not optional
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#
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$addr = record_runtime_address( $type, $interface );
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}
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if ( $ports ) {
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$addr =~ s/ $//;
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$addr = $family == F_IPV4 ? "${addr}${ports} " : "[$addr]$ports ";
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}
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$addrlist .= '--to-source ' . $addr;
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#
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# Interface is not optional
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#
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$addr = record_runtime_address( $type, $interface );
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}
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if ( $ports ) {
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$addr =~ s/ $//;
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$addr = $family == F_IPV4 ? "${addr}${ports} " : "[$addr]$ports ";
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}
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$addrlist .= '--to-source ' . $addr;
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}
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} elsif ( $family == F_IPV4 ) {
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if ( $addr =~ /^.*\..*\..*\./ ) {
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@ -362,39 +360,37 @@ sub process_one_masq1( $$$$$$$$$$$$ )
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#
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# And Generate the Rule(s)
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#
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unless ( $snat ) {
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expand_rule( $chainref ,
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POSTROUTE_RESTRICT ,
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$prerule ,
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$baserule . $inlinematches . $rule ,
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$networks ,
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$destnets ,
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$origdest ,
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$target ,
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'' ,
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'' ,
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$exceptionrule ,
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'' )
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unless unreachable_warning( 0, $chainref );
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expand_rule( $chainref ,
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POSTROUTE_RESTRICT ,
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$prerule ,
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$baserule . $inlinematches . $rule ,
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$networks ,
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$destnets ,
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$origdest ,
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$target ,
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'' ,
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'' ,
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$exceptionrule ,
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'' )
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unless unreachable_warning( 0, $chainref );
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conditional_rule_end( $chainref ) if $detectaddress || $conditional;
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conditional_rule_end( $chainref ) if $detectaddress || $conditional;
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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_list $addresses, 'address' ) {
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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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$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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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_list $addresses, 'address' ) {
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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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$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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@ -402,8 +398,87 @@ sub process_one_masq1( $$$$$$$$$$$$ )
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}
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}
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progress_message " Masq record \"$currentline\" $done";
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}
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sub convert_one_masq1( $$$$$$$$$$$$ )
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{
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my ( $snat, $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) = @_;
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my $pre_nat;
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my $destnets = '';
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my $savelist;
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#
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# Leading '+'
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#
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$pre_nat = ( $interfacelist =~ s/^\+// );
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#
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# Check for INLINE
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#
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if ( $interfacelist =~ /^INLINE\((.+)\)$/ ) {
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$interfacelist = $1;
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}
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$savelist = $interfacelist;
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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 ( $family == F_IPV4 ) {
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if ( $interfacelist =~ /^([^:]+)::([^:]*)$/ ) {
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$destnets = $2;
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$interfacelist = $1;
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} elsif ( $interfacelist =~ /^([^:]+:[^:]+):([^:]+)$/ ) {
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$destnets = $2;
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$interfacelist = $1;
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} elsif ( $interfacelist =~ /^([^:]+):$/ ) {
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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 =~ /\./ || $2 =~ /^%/ ) {
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$interfacelist = $one;
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$destnets = $two;
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}
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}
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} elsif ( $interfacelist =~ /^(.+?):(.+)$/ ) {
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$interfacelist = $1;
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$destnets = $2;
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}
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#
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# If there is no source or destination then allow all addresses
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#
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$networks = ALLIP if $networks eq '-';
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$destnets = ALLIP if $destnets eq '-';
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my $target;
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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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my $saveaddresses = $addresses;
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if ( $addresses ne 'random' ) {
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$addresses =~ s/:persistent$//;
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$addresses =~ s/:random$//;
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if ( $addresses eq 'detect' ) {
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$target = 'SNAT';
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} elsif ( $addresses eq 'NONAT' ) {
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$target = 'CONTINUE';
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} elsif ( $addresses ) {
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if ( $addresses =~ /^:/ ) {
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$target = 'MASQUERADE';
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} else {
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$target = 'SNAT';
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}
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}
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}
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$addresses = $saveaddresses;
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} else {
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$target = 'MASQUERADE';
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}
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if ( $snat ) {
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$target =~ s/ .*//;
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$target .= '+' if $pre_nat;
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if ( $addresses ne '-' && $addresses ne 'NONAT' ) {
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@ -424,7 +499,7 @@ sub process_one_masq1( $$$$$$$$$$$$ )
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print $snat "$line\n";
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}
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progress_message " Masq record \"$currentline\" $done";
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progress_message " Masq record \"$rawcurrentline\" Converted";
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}
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@ -432,17 +507,37 @@ sub process_one_masq( $ )
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{
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my ( $snat ) = @_;
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my ($interfacelist, $networks, $addresses, $protos, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) =
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split_line2( 'masq file',
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{ interface => 0, source => 1, address => 2, proto => 3, port => 4, ipsec => 5, mark => 6, user => 7, switch => 8, origdest => 9, probability => 10 },
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{}, #Nopad
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undef, #Columns
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1 ); #Allow inline matches
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if ( $snat ) {
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unless ( $rawcurrentline =~ /^\s*(?:#.*)?$/ ) {
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#
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# Line was not blank or all comment
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#
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my ($interfacelist, $networks, $addresses, $protos, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) =
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split_rawline2( 'masq file',
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{ interface => 0, source => 1, address => 2, proto => 3, port => 4, ipsec => 5, mark => 6, user => 7, switch => 8, origdest => 9, probability => 10 },
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{}, #Nopad
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undef, #Columns
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1 ); #Allow inline matches
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fatal_error 'INTERFACE must be specified' if $interfacelist eq '-';
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if ( $interfacelist ne '-' ) {
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for my $proto ( split_list $protos, 'Protocol' ) {
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convert_one_masq1( $snat, $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability );
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}
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}
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}
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} else {
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my ($interfacelist, $networks, $addresses, $protos, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability ) =
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split_line2( 'masq file',
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{ interface => 0, source => 1, address => 2, proto => 3, port => 4, ipsec => 5, mark => 6, user => 7, switch => 8, origdest => 9, probability => 10 },
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{}, #Nopad
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undef, #Columns
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1 ); #Allow inline matches
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for my $proto ( split_list $protos, 'Protocol' ) {
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process_one_masq1( $snat, $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability );
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fatal_error 'INTERFACE must be specified' if $interfacelist eq '-';
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for my $proto ( split_list $protos, 'Protocol' ) {
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process_one_masq1( $interfacelist, $networks, $addresses, $proto, $ports, $ipsec, $mark, $user, $condition, $origdest, $probability );
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}
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}
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}
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@ -497,7 +592,19 @@ sub convert_masq() {
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my $have_masq_rules;
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directive_callback( sub () { print $snat "$_[1]\n"; 0; } );
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directive_callback(
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sub ()
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{
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if ( $_[0] eq 'OMITTED' ) {
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#
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# Convert the raw rule
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#
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process_one_masq( $snat) if $snat;
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} else {
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print $snat "$_[1]\n"; 0;
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}
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}
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);
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first_entry(
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sub {
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@ -510,7 +617,18 @@ sub convert_masq() {
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}
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);
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process_one_masq($snat), $have_masq_rules++ while read_a_line( NORMAL_READ );
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while ( read_a_line( NORMAL_READ ) ) {
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#
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# Process the file normally
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#
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process_one_masq(0);
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#
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# Now Convert it
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#
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process_one_masq($snat);
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$have_masq_rules++;
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}
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if ( $have_masq_rules ) {
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progress_message2 "Converted $fn to $fn1";
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