forked from extern/shorewall_code
6120a8358d
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5586 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
496 lines
14 KiB
Perl
496 lines
14 KiB
Perl
#
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# Shorewall 3.9 -- /usr/share/shorewall/Shorewall/Tc.pm
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#
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# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
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#
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# (c) 2007 - Tom Eastep (teastep@shorewall.net)
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#
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# Traffic Control is from tc4shorewall Version 0.5
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# (c) 2005 Arne Bernin <arne@ucbering.de>
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# Modified by Tom Eastep for integration into the Shorewall distribution
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# published under GPL Version 2#
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
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#
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#
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package Shorewall::Tc;
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require Exporter;
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use Shorewall::Common;
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use Shorewall::Config;
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use Shorewall::Zones;
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use Shorewall::Chains;
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use strict;
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our @ISA = qw(Exporter);
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our @EXPORT = qw( process_tcrules setup_traffic_shaping );
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our @EXPORT_OK = qw( process_tc_rule );
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our @VERSION = 1.00;
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my %tcs = ( t => { chain => 'tcpost',
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connmark => 0,
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fw => 1
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} ,
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ct => { chain => 'tcpost' ,
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target => 'CONNMARK --set-mark' ,
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connmark => 1 ,
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fw => 1
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} ,
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c => { target => 'CONNMARK --set-mark' ,
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connmark => 1 ,
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fw => 1
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} ,
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p => { chain => 'tcpre' ,
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connmark => 0 ,
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fw => 0
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} ,
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cp => { chain => 'tcpre' ,
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target => 'CONNMARK --set-mark' ,
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connmark => 1 ,
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fw => 0
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} ,
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f => { chain => 'tcfor' ,
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connmark => 0 ,
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fw => 0
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} ,
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cf => { chain => 'tcfor' ,
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fw => 0 ,
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connmark => 1 ,
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} ,
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t => { chain => 'tcpost' ,
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connmark => 0 ,
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fw => 0
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} ,
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ct => { chain => 'tcpost' ,
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target => 'CONNMARK --set-mark' ,
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connmark => 1 ,
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fw => 0
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} ,
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c => { target => 'CONNMARK --set-mark' ,
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connmark => 1 ,
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fw => 0
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}
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);
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use constant { NOMARK => 0 ,
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SMALLMARK => 1 ,
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HIGHMARK => 2
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};
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my @tccmd = ( { pattern => 'SAVE' ,
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target => 'CONNMARK --save-mark --mask' ,
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mark => SMALLMARK ,
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mask => '0xFF'
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} ,
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{ pattern => 'RESTORE' ,
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target => 'CONNMARK --restore-mark --mask' ,
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mark => SMALLMARK ,
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mask => '0xFF'
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} ,
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{ pattern => 'CONTINUE',
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target => 'RETURN' ,
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mark => NOMARK ,
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mask => ''
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} ,
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{ pattern => '\|.*' ,
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target => 'MARK --or-mark' ,
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mark => HIGHMARK ,
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mask => '' } ,
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{ pattern => '&.*' ,
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target => 'MARK --and-mark ' ,
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mark => HIGHMARK ,
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mask => ''
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}
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);
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sub process_tc_rule( $$$$$$$$$$ ) {
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my ( $mark, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $extra ) = @_;
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my $original_mark = $mark;
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( $mark, my $designator ) = split /:/, $mark;
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my $chain = $env{MARKING_CHAIN};
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my $target = 'MARK --set-mark';
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my $tcsref;
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my $connmark = 0;
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my $classid = 0;
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if ( $source ) {
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if ( $source eq $firewall_zone ) {
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$chain = 'tcout';
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$source = '';
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} else {
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$chain = 'tcout' if $source =~ s/^($firewall_zone)://;
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}
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}
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if ( $designator ) {
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$tcsref = $tcs{$designator};
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if ( $tcsref ) {
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if ( $chain eq 'tcout' ) {
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fatal_error "Invalid chain designator for source $firewall_zone; rule \"$line\"" unless $tcsref->{fw};
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}
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$chain = $tcsref->{chain} if $tcsref->{chain};
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$target = $tcsref->{target} if $tcsref->{target};
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$mark = "$mark/0xFF" if $connmark = $tcsref->{connmark};
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} else {
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fatal_error "Invalid MARK ($original_mark) in rule \"$line\"" unless $mark =~ /^([0-9]+|0x[0-9a-f]+)$/ and $designator =~ /^([0-9]+|0x[0-9a-f]+)$/;
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$chain = 'tcpost';
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$classid = 1;
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$mark = $original_mark;
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$target = 'CLASSIFY --set-class';
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}
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}
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my $mask = 0xffff;
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my ($cmd, $rest) = split '/', $mark;
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unless ( $classid )
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{
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MARK:
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{
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PATTERN:
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for my $tccmd ( @tccmd ) {
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if ( $cmd =~ /^($tccmd->{pattern})$/ ) {
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fatal_error "$mark not valid with :C[FP]" if $connmark;
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$target = "$tccmd->{target} ";
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my $marktype = $tccmd->{mark};
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$mark =~ s/^[!&]//;
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if ( $rest ) {
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fatal_error "Invalid MARK ($original_mark)" if $marktype == NOMARK;
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$mark = $rest if $tccmd->{mask};
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if ( $marktype == SMALLMARK ) {
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verify_small_mark $mark;
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} else {
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validate_mark $mark;
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}
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} elsif ( $tccmd->{mask} ) {
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$mark = $tccmd->{mask};
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}
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last MARK;
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}
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}
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}
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validate_mark $mark;
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fatal_error 'Marks < 256 may not be set in the PREROUTING chain when HIGH_ROUTE_MARKS=Yes'
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if $cmd && $chain eq 'tcpre' && numeric_value( $cmd ) < 0xFF && $config{HIGH_ROUTE_MARKS};
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}
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expand_rule
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ensure_chain( 'mangle' , $chain ) ,
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NO_RESTRICT ,
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do_proto( $proto, $ports, $sports) . do_test( $testval, $mask ) ,
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$source ,
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$dest ,
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'' ,
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"-j $target $mark" ,
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'' ,
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'' ,
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'';
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progress_message " TC Rule \"$line\" $done";
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}
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#
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# Process the tcrules file
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#
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sub process_tcrules() {
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open TC, "$ENV{TMP_DIR}/tcrules" or fatal_error "Unable to open stripped tcrules file: $!";
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while ( $line = <TC> ) {
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chomp $line;
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$line =~ s/\s+/ /g;
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my ( $mark, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $extra ) = split /\s+/, $line;
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if ( $mark eq 'COMMENT' ) {
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if ( $capabilities{COMMENTS} ) {
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( $comment = $line ) =~ s/^\s*COMMENT\s*//;
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$comment =~ s/\s*$//;
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} else {
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warning_message "COMMENT ignored -- requires comment support in iptables/Netfilter";
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}
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} else {
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fatal_error "Invalid tcrule: \"$line\"" if $extra;
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process_tc_rule $mark, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos
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}
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}
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close TC;
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$comment = '';
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}
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#
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# Perl version of Arn Bernin's 'tc4shorewall'.
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#
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# TCDevices Table
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#
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# %tcdevices { <interface> -> {in_bandwidth => <value> ,
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# out_bandwidth => <value>
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# number => <ordinal>
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# default => <default class mark value> }
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#
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my @tcdevices;
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my %tcdevices;
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#
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# TCClasses Table
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#
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# %tcclasses { device => <device> ,
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# mark => <mark> ,
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# rate => <rate> ,
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# ceiling => <ceiling> ,
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# priority => <priority> ,
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# options => { tos => [ <value1> , <value2> , ... ];
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# tcp_ack => 1 ,
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# ...
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#
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my @tcclasses;
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my %tcclasses;
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my $r2q = 10;
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my $prefix = '1';
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sub rate_to_kbit( $ ) {
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my $rate = $_[0];
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return $1 if $rate =~ /^(\d+)kbit$/i;
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return $1 * 1024 if $rate =~ /^(\d+)mbit$/i;
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return $1 * 8192 if $rate =~ /^(\d+)mbps$/i;
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return $1 * 8 if $rate =~ /^(\d+)kbps$/i;
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return $rate / 128 if $rate =~ /^\d+$/;
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fatal_error "Invalid Rate ( $rate ) in tcdevice \"$line\"";
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}
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sub calculate_quantum( $ ) {
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my $rate = rate_to_kbit $_[0];
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int( $rate * ( 128 / $r2q ));
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}
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sub validate_tc_device( $$$ ) {
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my ( $device, $inband, $outband ) = @_;
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fatal_error "Duplicate device ( $device ) in tcdevice \"$line\"" if $tcdevices{$device};
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fatal_error "Invalid device name ( $device ) in tcdevice \"$line\"" if $device =~ /[:+]/;
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$tcdevices{$device} = {};
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$tcdevices{$device}{in_bandsidth} = rate_to_kbit $inband;
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$tcdevices{$device}{out_bandwidth} = rate_to_kbit $outband;
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push @tcdevices, $device;
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}
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sub convert_rate( $$ ) {
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my ($full, $rate) = @_;
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$rate =~ s/\bfull\b/$full/g;
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int( $rate );
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}
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sub validate_tc_class( $$$$$$ ) {
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my ( $device, $mark, $rate, $ceil, $prio, $options ) = @_;
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my %tosoptions = ( 'tos-minimize-delay' => 'tos=0x10/0x10' ,
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'tos-maximize-throughput' => 'tos=0x08/0x08' ,
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'tos-maximize-reliability' => 'tos=0x04/0x04' ,
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'tos-minimize-cost' => 'tos=0x02/0x02' ,
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'tos-normal-service' => 'tos=0x00/0x1e' );
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my $devref = $tcdevices{$device};
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fatal_error "Unknown Device ( $device ) in tcclass \"$line\"" unless $devref;
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my $full = $devref->{out_bandwidth};
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$tcclasses{$device} = {} unless $tcclasses{$device};
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my $tcref = $tcclasses{$device};
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fatal_error "Invalid Mark ( $mark ) in tcclass \"$line\"" unless $mark =~ /^([0-9]+|0x[0-9a-f]+)$/ && numeric_value( $mark ) < 0xff;
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my $markval = numeric_value( $mark );
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fatal_error "Duplicate Mark ( $mark ) in tcclass \"$line\"" if $tcref->{$markval};
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$tcref->{$markval} = {};
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$tcref = $tcref->{$markval};
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$tcref->{tos} = [];
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$tcref->{rate} = convert_rate $full, $rate;
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$tcref->{ceiling} = convert_rate $full, $ceil;
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$tcref->{priority} = defined $prio ? $prio : 1;
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for my $option ( split /,/, "\L$options" ) {
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my $optval = $tosoptions{$option};
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$option = $optval if $optval;
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if ( $option eq 'default' ) {
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fatal_error "Only one default class may be specified for device $device" if $devref->{default};
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$devref->{default} = $markval;
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} elsif ( $option eq 'tcp-ack' ) {
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$tcref->{tcp_ack} = 1;
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} elsif ( $option =~ /^tos=0x[0-9a-f]{2}$/ ) {
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push @{$tcref->{tos}}, "$option/0xff";
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} elsif ( $option =~ /^tos=0x[0-9a-f]{2}\/0x[0-9a-f]{2}$/ ) {
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push @{$tcref->{tos}}, "$option/0xff";
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} else {
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fatal_error "Unknown option ( $option ) for tcclass \"$line\"";
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}
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}
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push @tcclasses, "$device:$markval";
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}
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sub setup_traffic_shaping() {
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if ( -s "$ENV{TMP_DIR}/tcdevices" ) {
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save_progress_message "Setting up Traffic Control...";
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my $fn = find_file 'tcdevices';
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progress_message2 "$doing $fn...";
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open TD, "$ENV{TMP_DIR}/tcdevices" or fatal_error "Unable to open stripped tcdevices file: $!";
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while ( $line = <TD> ) {
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chomp $line;
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$line =~ s/\s+/ /g;
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my ( $device, $inband, $outband, $extra ) = split /\s+/, $line;
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fatal_error "Invalid tcdevices entry: \"$line\"" if $extra || ! $outband;
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validate_tc_device( $device, $inband, $outband );
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}
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}
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close TD;
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if ( -s "$ENV{TMP_DIR}/tcclasses" ) {
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my $fn = find_file 'tcdevices';
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progress_message2 "$doing $fn...";
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open TC, "$ENV{TMP_DIR}/tcclasses" or fatal_error "Unable to open stripped tcclasses file: $!";
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while ( $line = <TC> ) {
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chomp $line;
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$line =~ s/\s+/ /g;
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my ( $device, $mark, $rate, $ceil, $prio, $options, $extra ) = split /\s+/, $line;
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fatal_error "Invalid tcclasses entry: \"$line\"" if $extra || ! $ceil;
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validate_tc_class( $device, $mark, $rate, $ceil, $prio, $options );
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}
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}
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close TC;
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my $devnum = 0;
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$prefix = '10' if @tcdevices > 10;
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for my $device ( @tcdevices ) {
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my $dev = chain_base( $device );
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my $devref = $tcdevices{$device};
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my $defmark = $devref->{default};
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fatal_error "Option default is not defined for any class in tcclasses for interface $device" unless $defmark;
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emit "if interface_is_usable $device; then";
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push_indent;
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emit "${dev}_exists=Yes";
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emit "qt tc qdisc del dev $device root";
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emit "qt tc qdisc del dev $device ingress";
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emit "${dev}_mtu=\$(get_device_mtu $device)";
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emit qq(run_tc "class add dev $device parent $devnum: classid $devnum:1 htb rate $devref->{out_bandwidth} mtu \$${dev}_mtu");
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my $inband = rate_to_kbit $devref->{in_band};
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if ( $inband ) {
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emit "run_tc add dev $device handle ffff: ingress";
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emit "run_tc filter add dev $device parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate $inband burst 10k drop flowid :1";
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}
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$devref->{number} = $devnum++;
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save_progress_message_short " TC Device $device defined.";
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pop_indent;
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emit 'else';
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push_indent;
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emit qq(error_message "\"WARNING: Device $device not up and configured -- traffic-shaping configuration skipped\"");
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emit "${dev}_exists=";
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pop_indent;
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emit "fi\n";
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}
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for my $class ( @tcclasses ) {
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my ( $device, $mark ) = split /:/, $class;
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my $devref = $tcdevices{$device};
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my $tcref = $tcclasses{$device}{$mark};
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my $classid = "$devref->{number}:${prefix}${mark}";
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my $rate = $tcref->{rate};
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my $quantum = calculate_quantum $rate;
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my $dev = chain_base $device;
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emit "[ \$${dev}_mtu -gt $quantum ] && quantum=\$${dev}_mtu || quantum=$quantum";
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emit qq(run_tc "class add dev $device parent $devref->{number}:1 classid $classid htb rate $rate ceil $tcref->{ceiling} prio $tcref->{priority} mtu \$${dev}_mtu quantum \$quantum");
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emit qq(run_tc qdisc add dev $device parent $classid handle ${prefix}${mark}: sfq perturb 10);
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#
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# add filters
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#
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if ( "$capabilities{CLASSIFY_TARGET}" && known_interface $device ) {
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emit "run_iptables -t mangle -A tcpost -o $device -m mark --mark $mark/0xFF -j CLASSIFY --set-class $classid";
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} else {
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emit "run_tc filter add dev $device protocol ip parent $devnum:0 prio 1 handle $mark fw classid $classid";
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}
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#
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#options
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#
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emit "run_tc filter add dev $device parent $devref->{number}:0 protocol ip prio 10 u32 match ip protocol 6 0xff match u8 0x05 0x0f at 0 match u16 0x0000 0xffc0 at 2 match u8 0x10 0xff at 33 flowid $classid" if $tcref->{tcp_ack};
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for my $tospair ( @{$devref->{tos}} ) {
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my ( $tos, $mask ) = split q(//), $tospair;
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emit "run_tc filter add dev $device parent $devnum:0 protocol ip prio 10 u32 match ip tos $tos $mask flowid $classid";
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}
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save_progress_message_short " TC Class $device:$mark defined.";
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}
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}
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1;
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