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First truly working u32 filters

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8305 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep 2008-03-19 16:02:16 +00:00
parent 2daa5705d9
commit affa4684b8
2 changed files with 35 additions and 27 deletions
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7
Shorewall-perl/Shorewall/Config.pm
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@ -57,6 +57,7 @@ our %EXPORT_TAGS = ( internal => [ qw( create_temp_object
numeric_value numeric_value
in_hex in_hex
in_hex2 in_hex2
in_hex3
in_hex4 in_hex4
in_hex8 in_hex8
emit emit
@ -357,7 +358,6 @@ sub initialize() {
DONT_LOAD => '', DONT_LOAD => '',
BROKEN_ROUTING => '', BROKEN_ROUTING => '',
AUTO_COMMENT => '' , AUTO_COMMENT => '' ,
BROKEN_NEXTHDR => '' ,
# #
# Packet Disposition # Packet Disposition
# #
@ -536,6 +536,10 @@ sub in_hex2( $ ) {
sprintf '0x%02x', $_[0]; sprintf '0x%02x', $_[0];
} }
sub in_hex3( $ ) {
sprintf '%03x', $_[0];
}
sub in_hex4( $ ) { sub in_hex4( $ ) {
sprintf '0x%04x', $_[0]; sprintf '0x%04x', $_[0];
} }
@ -1910,7 +1914,6 @@ sub get_configuration( $ ) {
default_yes_no 'DELETE_THEN_ADD' , 'Yes'; default_yes_no 'DELETE_THEN_ADD' , 'Yes';
default_yes_no 'BROKEN_ROUTING' , ''; default_yes_no 'BROKEN_ROUTING' , '';
default_yes_no 'AUTO_COMMENT' , 'Yes'; default_yes_no 'AUTO_COMMENT' , 'Yes';
default_yes_no 'BROKEN_NEXTHDR' , '';
default_yes_no 'MULTICAST' , ''; default_yes_no 'MULTICAST' , '';
default_yes_no 'MARK_IN_FORWARD_CHAIN' , ''; default_yes_no 'MARK_IN_FORWARD_CHAIN' , '';

55
Shorewall-perl/Shorewall/Tc.pm
View File

@ -150,6 +150,7 @@ our %restrictions = ( tcpre => PREROUTE_RESTRICT ,
tcpost => POSTROUTE_RESTRICT , tcpost => POSTROUTE_RESTRICT ,
tcfor => NO_RESTRICT , tcfor => NO_RESTRICT ,
tcout => OUTPUT_RESTRICT ); tcout => OUTPUT_RESTRICT );
# #
# Initialize globals -- we take this novel approach to globals initialization to allow # Initialize globals -- we take this novel approach to globals initialization to allow
# the compiler to run multiple times in the same process. The # the compiler to run multiple times in the same process. The
@ -381,7 +382,8 @@ sub validate_tc_device( $$$$$ ) {
out_bandwidth => rate_to_kbit( $outband ) . 'kbit' , out_bandwidth => rate_to_kbit( $outband ) . 'kbit' ,
number => $devnumber, number => $devnumber,
classify => $classify , classify => $classify ,
redirected => \@redirected }; tablenumber => 64 ,
redirected => \@redirected } ,
push @tcdevices, $device; push @tcdevices, $device;
@ -545,35 +547,34 @@ sub process_tc_filter( $$$$$$ ) {
$protonumber = resolve_proto $proto; $protonumber = resolve_proto $proto;
fatal_error "Unknown PROTO ($proto)" unless defined $protonumber; fatal_error "Unknown PROTO ($proto)" unless defined $protonumber;
my $pnumber = in_hex2 $protonumber; if ( $protonumber ) {
my $pnumber = in_hex2 $protonumber;
$rule .= "\\\n match u8 $pnumber 0xFF at 9"; $rule .= "\\\n match u8 $pnumber 0xFF at 9";
}
} }
unless ( $port eq '-' ) { unless ( $port eq '-' ) {
fatal_error "Only TCP, UDP, SCTP and ICMP may specify DEST PORT" fatal_error "Only TCP, UDP, SCTP and ICMP may specify DEST PORT"
unless $protonumber == TCP || $protonumber == UDP || $protonumber == SCTP || $protonumber == ICMP; unless $protonumber == TCP || $protonumber == UDP || $protonumber == SCTP || $protonumber == ICMP;
my $tnum = in_hex3 $devref->{tablenumber}++;
emit( "run_tc filter add dev $device parent $devref->{number}:0 protocol ip pref 10 handle $tnum: u32 divisor 1" );
emit( "run_tc $rule link $tnum:0 offset at 0 mask 0x0F00 shift 6 plus 0 eat" );
$rule = "filter add dev $device protocol ip parent $devref->{number}:0 pref 10 u32 ht $tnum:0";
if ( $protonumber == ICMP ) { if ( $protonumber == ICMP ) {
my ( $icmptype , $icmpcode ) = split '//', validate_icmp( $port ); my ( $icmptype , $icmpcode ) = split '//', validate_icmp( $port );
$icmptype = in_hex2 numeric_value $icmptype; $icmptype = in_hex2 numeric_value $icmptype;
$icmpcode = in_hex2 numeric_value $icmpcode if defined $icmpcode; $icmpcode = in_hex2 numeric_value $icmpcode if defined $icmpcode;
if ( $config{BROKEN_NEXTHDR} ) { $rule .= "\\\n match u8 $icmptype 0xFF at nexthdr+0";
$rule .= "\\\n match u8 $icmptype 0xFF at 20"; $rule .= "\\\n match u8 $icmpcode 0xFF at nexthdr+1" if defined $icmpcode;
$rule .= "\\\n match u8 $icmpcode 0xFF at 21" if defined $icmpcode;
} else {
$rule .= "\\\n match u8 $icmptype 0xFF at nexthdr+0";
$rule .= "\\\n match u8 $icmpcode 0xFF at nexthdr+1" if defined $icmpcode;
}
} else { } else {
my $portnumber = in_hex8 validate_port( $protonumber , $port ); my $portnumber = in_hex8 validate_port( $protonumber , $port );
if ( $config{BROKEN_NEXTHDR} ) { $rule .= "\\\n match u32 $portnumber 0x0000FFFF at nexthdr+0";
$rule .= "\\\n match u32 $portnumber 0x0000FFFF at 20";
} else {
$rule .= "\\\n match u32 $portnumber 0x0000FFFF at nexthdr+0";
}
} }
} }
@ -582,13 +583,17 @@ sub process_tc_filter( $$$$$$ ) {
unless $protonumber == TCP || $protonumber == UDP || $protonumber == SCTP; unless $protonumber == TCP || $protonumber == UDP || $protonumber == SCTP;
my $portnumber = in_hex8 validate_port( $protonumber , $sport ); my $portnumber = in_hex8 validate_port( $protonumber , $sport );
$portnumber =~ s/0x0000/0x/; if ( $port eq '-' ) {
my $tnum = in_hex3 $devref->{tablenumber}++;
if ( $config{BROKEN_NEXTHDR} ) {
$rule .= "\\\n match u32 ${portnumber}0000 0xFFFF0000 at 20"; emit( "run_tc filter add dev $device parent $devref->{number}:0 protocol ip pref 10 handle $tnum: u32 divisor 1" );
} else { emit( "run_tc $rule link $tnum:0 offset at 0 mask 0x0F00 shift 6 plus 0 eat" );
$rule .= "\\\n match u32 ${portnumber}0000 0xFFFF0000 at nexthdr+0";
$rule = "filter add dev $device protocol ip parent $devref->{number}:0 pref 10 u32 ht $tnum:0";
} }
$portnumber =~ s/0x0000/0x/;
$rule .= "\\\n match u32 ${portnumber}0000 0xFFFF0000 at nexthdr+0";
} }
emit( "run_tc $rule\\" , emit( "run_tc $rule\\" ,
@ -660,7 +665,7 @@ sub setup_traffic_shaping() {
if ( $inband ) { if ( $inband ) {
emit ( "run_tc qdisc add dev $device handle ffff: ingress", emit ( "run_tc qdisc add dev $device handle ffff: ingress",
"run_tc filter add dev $device parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate ${inband}kbit burst 10k drop flowid :1" "run_tc filter add dev $device parent ffff: protocol ip pref 10 u32 match ip src 0.0.0.0/0 police rate ${inband}kbit burst 10k drop flowid :1"
); );
} }
@ -713,11 +718,11 @@ sub setup_traffic_shaping() {
# #
# add filters # add filters
# #
emit "run_tc filter add dev $device protocol ip parent $devicenumber:0 prio 1 handle $mark fw classid $classid" unless $devref->{classify}; emit "run_tc filter add dev $device protocol ip parent $devicenumber:0 pref 10 handle $mark fw classid $classid" unless $devref->{classify};
# #
#options #options
# #
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}; emit "run_tc filter add dev $device parent $devref->{number}:0 protocol ip pref 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};
for my $tospair ( @{$tcref->{tos}} ) { for my $tospair ( @{$tcref->{tos}} ) {
my ( $tos, $mask ) = split q(/), $tospair; my ( $tos, $mask ) = split q(/), $tospair;