forked from extern/shorewall_code
Remove Rules module
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5530 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
0b03e47766
commit
119587d501
@ -1,630 +0,0 @@
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package Shorewall::Rules;
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require Exporter;
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use strict;
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use Shorewall::Common;
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use Shorewall::Config;
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use Shorewall::Chains;
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use Shorewall::Zones;
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use Shorewall::Interfaces;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( STANDARD
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NATRULE
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BUILTIN
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NONAT
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NATONLY
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REDIRECT
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ACTION
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MACRO
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LOGRULE
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do_proto
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mac_match
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numeric_value
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verify_mark
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verify_small_mark
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validate_mark
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do_test
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do_ratelimit
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do_user
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iprange_match
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match_source_net
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match_dest_net
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match_orig_dest
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match_ipsec_in
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match_ipsec_out
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log_rule_limit
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log_rule
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expand_rule
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addnatjump
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insertnatjump
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%targets
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);
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our @EXPORT_OK = ();
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our @VERSION = 1.00;
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#
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#
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# Handle parsing of PROTO, DEST PORT(S) , SOURCE PORTS(S). Returns the appropriate match string.
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#
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sub do_proto( $$$ )
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{
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my ($proto, $ports, $sports ) = @_;
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my $output = '';
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$proto = '' unless defined $proto;
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$ports = '' unless defined $ports;
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$sports = '' unless defined $sports;
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$proto = '' if $proto eq '-';
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$ports = '' if $ports eq '-';
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$sports = '' if $sports eq '-';
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if ( $proto ) {
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if ( $proto =~ /^(tcp|udp|6|17)$/i ) {
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$output = "-p $proto ";
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if ( $ports ) {
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my @ports = split /,/, $ports;
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my $count = @ports;
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if ( $count > 1 ) {
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fatal_error "Port list requires Multiport support in your kernel/iptables: $ports" unless $capabilities{MULTIPORT};
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fatal_error "Port range in a list requires Extended Multiport Support in your kernel/iptables: $ports" unless $capabilities{XMULTIPORT};
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for my $port ( @ports ) {
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$count++ if $port =~ /:/;
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}
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fatal_error "Too many entries in port list: $ports" if $count > 15;
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$output .= "-m multiport --dports $ports ";
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} else {
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$output .= "--dport $ports ";
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}
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}
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if ( $sports ) {
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my @ports = split /,/, $sports;
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my $count = @ports;
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if ( $count > 1 ) {
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fatal_error "Port list requires Multiport support in your kernel/iptables: $sports" unless $capabilities{MULTIPORT};
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fatal_error "Port range in a list requires Extended Multiport Support in your kernel/iptables: $sports" unless $capabilities{XMULTIPORT};
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for my $port ( @ports ) {
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$count++ if $port =~ /:/;
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}
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fatal_error "Too many entries in port list: $sports" if $count > 15;
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$output .= "-m multiport --sports $sports ";
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} else {
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$output .= "--sport $sports ";
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}
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}
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} elsif ( $proto =~ /^(icmp|1)$/i ) {
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$output .= "-p icmp --icmp-type $ports " if $ports;
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fatal_error 'SOURCE PORT(S) not permitted with ICMP' if $sports;
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} elsif ( $proto =~ /^(ipp2p(:(tcp|udp|all)))?$/i ) {
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fatal_error 'PROTO = ipp2p requires IPP2P match support in your kernel/iptables' unless $capabilities{IPP2P};
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$proto = $2 ? $3 : 'tcp';
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$ports = 'ipp2p' unless $ports;
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$output .= "-p $proto -m ipp2p --$ports ";
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}
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} elsif ( $ports || $sports ) {
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fatal_error "SOURCE/DEST PORT(S) not allowed without PROTO, rule \"$line\""
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}
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$output;
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}
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sub mac_match( $ ) {
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my $mac = $_[0];
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$mac =~ s/^(!?)~//;
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$mac =~ s/^!// if my $invert = $1 ? '! ' : '';
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$mac =~ s/-/:/g;
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"--match mac --mac-source ${invert}$mac ";
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}
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#
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# Convert value to decimal number
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#
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sub numeric_value ( $ ) {
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my $mark = $_[0];
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$mark =~ /^0x/ ? hex $mark : $mark =~ /^0/ ? oct $mark : $mark;
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}
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#
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# Mark validatation functions
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#
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sub verify_mark( $ ) {
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my $mark = $_[0];
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my $limit = $config{HIGH_ROUTE_MARKS} ? 0xFFFF : 0xFF;
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fatal_error "Invalid Mark or Mask value: $mark"
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unless "\L$mark" =~ /^(0x[a-f0-9]+|0[0-7]*|[0-9]*)$/ && numeric_value( $mark ) <= $limit;
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}
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sub verify_small_mark( $ ) {
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verify_mark ( (my $mark) = $_[0] );
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fatal_error "Mark value ($mark) too large" if numeric_value( $mark ) > 0xFF;
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}
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sub validate_mark( $ ) {
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for ( split '/', $_[0] ) {
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verify_mark $_;
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}
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}
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#
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# Generate an appropriate -m [conn]mark match string for the contents of a MARK column
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#
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sub do_test ( $$ )
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{
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my ($testval, $mask) = @_;
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return '' unless $testval and $testval ne '-';
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my $invert = $testval =~ s/^!// ? '! ' : '';
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my $match = $testval =~ s/:C$// ? '-m connmark ' : '-m mark ';
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$testval .= '/0xFF' unless ( $testval =~ '/' );
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"${invert}$match $testval ";
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}
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#
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# Create a "-m limit" match for the passed LIMIT/BURST
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#
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sub do_ratelimit( $ ) {
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my $rate = $_[0];
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return '' unless $rate and $rate ne '-';
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if ( $rate =~ /^([^:]+):([^:]+)$/ ) {
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"-m limit --limit $1 --limit-burst $2 ";
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} else {
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"-m limit --limit $rate ";
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}
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}
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#
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# Create a "-m owner" match for the passed USER/GROUP
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#
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sub do_user( $ ) {
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my $user = $_[0];
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my $rule = ' -m owner';
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return '' unless $user and $user ne '-';
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if ( $user =~ /^(!)?(.*)\+(.*)$/ ) {
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$rule .= "! --cmd-owner $2 " if $2;
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$user = "!$1";
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} elsif ( $user =~ /^(.*)\+(.*)$/ ) {
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$rule .= "--cmd-owner $2 " if $2;
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$user = $1;
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}
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if ( $user =~ /^!(.*):(.*)$/ ) {
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$rule .= "! --uid-owner $1 " if $1;
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$rule .= "! --gid-owner $2 " if $2;
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} elsif ( $user =~ /^(.*):(.*)$/ ) {
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$rule .= "--uid-owner $1 " if $1;
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$rule .= "--gid-owner $2 " if $2;
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} elsif ( $user =~ /^!/ ) {
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$rule .= "! --uid-owner $user ";
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} else {
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$rule .= "--uid-owner $user ";
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}
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$rule;
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}
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#
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# Avoid generating a second '-m iprange' in a single rule.
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#
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sub iprange_match() {
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my $match = '';
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unless ( $iprangematch ) {
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$match = '-m iprange ';
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$iprangematch = 1;
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}
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$match;
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}
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#
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# Match a Source. Currently only handles IP addresses and ranges
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#
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sub match_source_net( $ ) {
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my $net = $_[0];
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if ( $net =~ /^(!?).*\..*\..*\..*-.*\..*\..*\..*/ ) {
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$net =~ s/!// if my $invert = $1 ? '! ' : '';
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iprange_match . "${invert}--src-range $net ";
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} elsif ( $net =~ /^(!?)~(.*)$/ ) {
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( $net = $2 ) =~ s/-/:/g;
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"-m mac --mac-source $1 $net "
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} elsif ( $net =~ /^!/ ) {
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$net =~ s/!//;
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"-s ! $net ";
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} else {
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$net eq ALLIPv4 ? '' : "-s $net ";
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}
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}
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#
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# Match a Source. Currently only handles IP addresses and ranges
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#
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sub match_dest_net( $ ) {
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my $net = $_[0];
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if ( $net =~ /^(!?).*\..*\..*\..*-.*\..*\..*\..*/ ) {
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$net =~ s/!// if my $invert = $1 ? '! ' : '';
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iprange_match . "${invert}--src-range $net ";
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} elsif ( $net =~ /^!/ ) {
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$net =~ s/!//;
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"-d ! $net ";
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} else {
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$net eq ALLIPv4 ? '' : "-d $net ";
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}
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}
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#
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# Match original destination
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#
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sub match_orig_dest ( $ ) {
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my $net = $_[0];
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return '' if $net eq ALLIPv4;
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if ( $net =~ /^!/ ) {
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$net =~ s/!//;
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"-m conntrack --ctorigdst ! $net ";
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} else {
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$net eq ALLIPv4 ? '' : "-m conntrack --ctorigdst $net ";
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}
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}
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#
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# Match Source IPSEC
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#
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sub match_ipsec_in( $$ ) {
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my ( $zone , $hostref ) = @_;
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my $match = '-m policy --dir in --pol ';
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my $zoneref = $zones{$zone};
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my $optionsref = $zoneref->{options};
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if ( $zoneref->{type} eq 'ipsec4' ) {
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$match .= "ipsec $optionsref->{in_out}{ipsec}$optionsref->{in}{ipsec}";
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} elsif ( $capabilities{POLICY_MATCH} ) {
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$match .= "$hostref->{ipsec} $optionsref->{in_out}{ipsec}$optionsref->{in}{ipsec}";
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} else {
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'';
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}
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}
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#
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# Match Dest IPSEC
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#
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sub match_ipsec_out( $$ ) {
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my ( $zone , $hostref ) = @_;
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my $match = '-m policy --dir out --pol ';
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my $zoneref = $zones{$zone};
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my $optionsref = $zoneref->{options};
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if ( $zoneref->{type} eq 'ipsec4' ) {
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$match .= "ipsec $optionsref->{in_out}{ipsec}$optionsref->{out}{ipsec}";
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} elsif ( $capabilities{POLICY_MATCH} ) {
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$match .= "$hostref->{ipsec} $optionsref->{in_out}{ipsec}$optionsref->{out}{ipsec}"
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} else {
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'';
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}
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}
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#
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# Generate a log message
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#
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sub log_rule_limit( $$$$$$$$ ) {
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my ($level, $chainref, $chain, $disposition, $limit, $tag, $command, $predicates ) = @_;
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my $prefix;
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$limit = $env{LOGLIMIT} unless $limit;
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if ( $tag ) {
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if ( $config{LOGTAGONLY} ) {
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$chain = $tag;
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$tag = '';
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} else {
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$tag .= ' ';
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}
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} else {
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$tag = '' unless defined $tag;
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}
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if ( $env{LOGRULENUMBERS} ) {
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$prefix = (sprintf $config{LOGFORMAT} , $chain , $chainref->{log}++, $disposition ) . $tag;
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} else {
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$prefix = (sprintf $config{LOGFORMAT} , $chain , $disposition) . $tag;
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}
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if ( length $prefix > 29 ) {
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$prefix = substr $prefix, 0, 29;
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warning_message "Log Prefix shortened to \"$prefix\"";
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}
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if ( $level eq 'ULOG' ) {
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$prefix = "-j ULOG $env{LOGPARMS} --ulog-prefix \"$prefix\" ";
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} else {
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$prefix = "-j LOG $env{LOGPARMS} --log-level $level --log-prefix \"$prefix\" ";
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}
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if ( $command eq 'add' ) {
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add_rule ( $chainref, $predicates . $prefix );
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} else {
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insert_rule ( $chainref , 1 , $predicates . $prefix );
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}
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}
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sub log_rule( $$$$ ) {
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my ( $level, $chainref, $disposition, $predicates ) = @_;
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log_rule_limit $level, $chainref, $chainref->{name} , $disposition, $env{LOGLIMIT}, '', 'add', $predicates;
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}
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#
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# This function provides a uniform way to generate rules (something the original Shorewall sorely needed).
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#
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sub expand_rule( $$$$$$$$$ )
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{
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my ($chainref , $rule, $source, $dest, $origdest, $target, $loglevel , $disposition, $exceptionrule ) = @_;
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my ($iiface, $diface, $inets, $dnets, $iexcl, $dexcl, $onets , $oexcl );
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#
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# Isolate Source Interface, if any
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#
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if ( $source ) {
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if ( $source eq '-' ) {
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$source = '';
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} elsif ( $source =~ /^([^:]+):([^:]+)$/ ) {
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$iiface = $1;
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$inets = $2;
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} elsif ( $source =~ /\+|~|\..*\./ ) {
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$inets = $source;
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} else {
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$iiface = $source;
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}
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} else {
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$source = '';
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}
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#
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# Verify Inteface, if any
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#
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if ( $iiface ) {
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fatal_error "Unknown Interface ($iiface): \"$line\"" unless known_interface $iiface;
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$rule .= "-i $iiface ";
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}
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#
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# Isolate Destination Interface, if any
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#
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if ( $dest ) {
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if ( $dest eq '-' ) {
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$dest = '';
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} elsif ( $dest =~ /^([^:]+):([^:]+)$/ ) {
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$diface = $1;
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$dnets = $2;
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} elsif ( $dest =~ /\+|~|\..*\./ ) {
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$dnets = $dest;
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} else {
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$diface = $dest;
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}
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} else {
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$dest = '';
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}
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#
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# Verify Destination Interface, if any
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#
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if ( $diface ) {
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fatal_error "Unknown Interface ($diface) in rule \"$line\"" unless known_interface $diface;
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$rule .= "-o $diface ";
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}
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#
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# Handle Log Level
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#
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my $logtag;
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if ( $loglevel ) {
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( $loglevel, $logtag ) = split /:/, $loglevel;
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if ( $loglevel =~ /^none!?$/i ) {
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return 1 if $disposition eq 'LOG';
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$loglevel = $logtag = '';
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}
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}
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#
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# Determine if there is Source Exclusion
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#
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if ( $inets ) {
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if ( $inets =~ /^([^!]+)?!([^!]+)$/ ) {
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$inets = $1;
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$iexcl = $2;
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} else {
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$iexcl = '';
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}
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if ( ! $inets ) {
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my @iexcl = split /,/, $iexcl;
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if ( @iexcl == 1 ) {
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$rule .= match_source_net "!$iexcl ";
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$iexcl = '';
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}
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}
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} else {
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$iexcl = '';
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}
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#
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# Determine if there is Destination Exclusion
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# $dexcl = '';
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if ( $dnets ) {
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if ( $dnets =~ /^([^!]+)?!([^!]+)$/ ) {
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$dnets = $1;
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$dexcl = $2;
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} else {
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$dexcl = '';
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}
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if ( ! $dnets ) {
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my @dexcl = split /,/, $dexcl;
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if ( @dexcl == 1 ) {
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$rule .= match_dest_net "!$dexcl ";
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$dexcl = '';
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}
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}
|
||||
} else {
|
||||
$dexcl = '';
|
||||
}
|
||||
|
||||
if ( $origdest ) {
|
||||
if ( $origdest =~ /^([^!]+)?!([^!]+)$/ ) {
|
||||
$onets = $1;
|
||||
$oexcl = $2;
|
||||
} else {
|
||||
$oexcl = '';
|
||||
}
|
||||
|
||||
if ( ! $onets ) {
|
||||
my @oexcl = split /,/, $oexcl;
|
||||
if ( @oexcl == 1 ) {
|
||||
$rule .= "-m conntrack --ctorigdst ! $oexcl ";
|
||||
$oexcl = '';
|
||||
}
|
||||
}
|
||||
} else {
|
||||
$oexcl = '';
|
||||
}
|
||||
|
||||
$inets = ALLIPv4 unless $inets;
|
||||
$dnets = ALLIPv4 unless $dnets;
|
||||
$onets = ALLIPv4 unless $onets;
|
||||
|
||||
if ( $iexcl || $dexcl || $oexcl ) {
|
||||
#
|
||||
# We have non-trivial exclusion -- need to create an exclusion chain
|
||||
#
|
||||
my $echain = newexclusionchain;
|
||||
|
||||
#
|
||||
# Use the current rule and sent all possible matches to the exclusion chain
|
||||
#
|
||||
for my $onet ( split /,/, $onets ) {
|
||||
$onet = match_orig_dest $onet;
|
||||
for my $inet ( split /,/, $inets ) {
|
||||
$inet = match_source_net $inet;
|
||||
for my $dnet ( split /,/, $dnets ) {
|
||||
add_rule $chainref, $rule . $inet . ( match_dest_net $dnet ) . $onet . "-j $echain";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#
|
||||
# The final rule in the exclusion chain will not qualify the source or destination
|
||||
#
|
||||
$inets = ALLIPv4;
|
||||
$dnets = ALLIPv4;
|
||||
|
||||
#
|
||||
# Create the Exclusion Chain
|
||||
#
|
||||
my $echainref = new_chain $chainref->{table}, $echain;
|
||||
|
||||
#
|
||||
# Generate RETURNs for each exclusion
|
||||
#
|
||||
for my $net ( split ',', $iexcl ) {
|
||||
add_rule $echainref, ( match_source_net $net ) . '-j RETURN';
|
||||
}
|
||||
|
||||
for my $net ( split ',', $dexcl ) {
|
||||
add_rule $echainref, ( match_dest_net $net ) . '-j RETURN';
|
||||
}
|
||||
|
||||
for my $net ( split ',', $oexcl ) {
|
||||
add_rule $echainref, ( match_orig_dest $net ) . '-j RETURN';
|
||||
}
|
||||
|
||||
#
|
||||
# Log rule
|
||||
#
|
||||
log_rule_limit $loglevel , $echainref , $chainref->{name}, $disposition , '', $logtag , 'add' , '' if $loglevel;
|
||||
#
|
||||
# Generate Final Rule
|
||||
#
|
||||
add_rule $echainref, $exceptionrule . $target unless $disposition eq 'LOG';
|
||||
|
||||
} else {
|
||||
#
|
||||
# No exclusions
|
||||
#
|
||||
for my $onet ( split /,/, $onets ) {
|
||||
$onet = match_orig_dest $onet;
|
||||
for my $inet ( split /,/, $inets ) {
|
||||
$inet = match_source_net $inet;
|
||||
for my $dnet ( split /,/, $dnets ) {
|
||||
log_rule_limit $loglevel , $chainref , $chainref->{name}, $disposition , '' , $logtag , 'add' , $rule . $inet . match_dest_net( $dnet ) . $onet if $loglevel;
|
||||
add_rule $chainref, $rule . $inet . match_dest_net( $dnet ) . $onet . $target unless $disposition eq 'LOG';
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#
|
||||
# If the destination chain exists, then at the end of the source chain add a jump to the destination.
|
||||
#
|
||||
sub addnatjump( $$$ ) {
|
||||
my ( $source , $dest, $predicates ) = @_;
|
||||
|
||||
my $destref = $nat_table->{$dest} || {};
|
||||
|
||||
if ( $destref->{referenced} ) {
|
||||
add_rule $nat_table->{$source} , $predicates . "-j $dest";
|
||||
} else {
|
||||
clearrule;
|
||||
}
|
||||
}
|
||||
#
|
||||
# If the destination chain exists, then at the position in the source chain given by $$countref, add a jump to the destination.
|
||||
#
|
||||
sub insertnatjump( $$$$ ) {
|
||||
my ( $source, $dest, $countref, $predicates ) = @_;
|
||||
|
||||
my $destref = $nat_table->{$dest} || {};
|
||||
|
||||
if ( $destref->{referenced} ) {
|
||||
insert_rule $nat_table->{$source} , ($$countref)++, $predicates . "-j $dest";
|
||||
} else {
|
||||
clearrule;
|
||||
}
|
||||
}
|
||||
|
||||
1;
|
||||
Loading…
Reference in New Issue
Block a user