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# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2008 Vyatta, Inc.
# All Rights Reserved.
# **** End License ****
package Vyatta::Qos::Match;
require Vyatta::Config;
use Vyatta::Qos::Util qw(getIfIndex getDsfield getProtocol);
use strict;
use warnings;
sub new {
my ( $that, $config ) = @_;
my $self = {};
my $class = ref($that) || $that;
bless $self, $class;
foreach my $proto (qw(ip ipv6 ether)) {
next unless $config->exists($proto);
foreach my $t (qw(vif dev)) {
die "can not match on $proto and $t\n" if $config->exists($t);
}
my %fields;
if ( $proto eq 'ether' ) {
$fields{protocol} =
getProtocol( $config->returnValue("ether protocol") );
$fields{src} = $config->returnValue("ether source");
$fields{dst} = $config->returnValue("ether destination");
}
else {
$fields{dsfield} =
getDsfield( $config->returnValue("$proto dscp") );
$fields{protocol} =
getProtocol( $config->returnValue("$proto protocol") );
$fields{src} = $config->returnValue("$proto source address");
$fields{dst} = $config->returnValue("$proto destination address");
$fields{sport} = $config->returnValue("$proto source port");
$fields{dport} = $config->returnValue("$proto destination port");
}
$self->{$proto} = \%fields;
}
$self->{_vif} = $config->returnValue("vif");
$self->{_dev} = getIfIndex( $config->returnValue("interface") );
return $self;
}
sub filter {
my ( $self, $dev, $parent, $classid, $prio, $dsmark, $police ) = @_;
# empty match
return unless %{$self};
# Special case for when dsmarking is used with ds matching
# original dscp is saved in tc_index
if ($dsmark) {
foreach my $ipver (qw(ip ipv6)) {
my $ip = $self->{$ipver};
next unless $ip && $$ip{dsfield};
printf "filter add dev %s parent %x: protocol %s prio $prio",
$dev, $parent, $ipver;
printf " handle %s tcindex classid %x:%x\n",
$$ip{dsfield}, $parent, $classid;
$prio += 1;
}
return;
}
foreach my $proto (qw(ip ipv6 ether)) {
my $p = $self->{$proto};
next unless $p;
printf "filter add dev %s parent %x:", $dev, $parent;
if ($prio) {
printf " prio %d", $prio;
$prio += 1;
}
if ($proto eq 'ether') {
my $type = $$p{protocol};
$type = 'all' unless $type;
if (defined($$p{src}) || defined($$p{dest})) {
print " protocol $type u32";
print " match ether src $$p{src}" if $$p{src};
print " match ether dst $$p{dst}" if $$p{dst};
} else {
# u32 requires some options to work but basic works
print " protocol $type basic";
}
} else {
print " protocol $proto u32";
# workaround inconsistent usage in tc u32 match
my $sel = $proto;
if ($proto eq 'ipv6') {
$sel = 'ip6';
printf " match u16 0x%x 0x0ff0 at 0", hex($$p{dsfield}) << 4,
if $$p{dsfield};
} else {
print " match $sel dsfield $$p{dsfield} 0xff" if $$p{dsfield};
}
print " match $sel protocol $$p{protocol} 0xff" if $$p{protocol};
print " match $sel src $$p{src}" if $$p{src};
print " match $sel sport $$p{sport} 0xffff" if $$p{sport};
print " match $sel dst $$p{dst}" if $$p{dst};
print " match $sel dport $$p{dport} 0xffff" if $$p{dport};
}
print " $police" if $police;
printf " flowid %x:%x\n", $parent, $classid;
}
my $indev = $self->{_indev};
my $vif = $self->{_vif};
if ( defined($vif) || defined($indev) ) {
printf "filter add dev %s parent %x: prio %d", $dev, $parent, $prio;
print " protocol all basic";
print " match meta\(rt_iif eq $indev\)" if $indev;
print " match meta\(vlan mask 0xfff eq $vif\)" if $vif;
print " $police" if $police;
printf " flowid %x:%x\n", $parent, $classid;
}
}
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