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First cut at mangle actions

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep 2016-03-06 12:42:22 -08:00
parent 89b2c2fb55
commit ba6dc9c5c0
2 changed files with 208 additions and 55 deletions
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255
Shorewall/Perl/Shorewall/Rules.pm
View File

@ -1779,7 +1779,9 @@ my %builtinops = ( 'dropBcast' => \&dropBcast,
'Limit' => \&Limit,
);
sub process_rule ( $$$$$$$$$$$$$$$$$$$$ );
sub process_mangle_rule1( $$$$$$$$$$$$$$$$$$ );
#
# Populate an action invocation chain. As new action tuples are encountered,
@ -1793,13 +1795,20 @@ sub process_action(\$\$$) {
my $wholeaction = ${$wholeactionref};
my $chainref = ${$chainrefref};
my ( $action, $level, $tag, undef, $param ) = split /:/, $wholeaction, ACTION_TUPLE_ELEMENTS;
my $type = $targets{$action};
if ( $targets{$action} & BUILTIN ) {
if ( $type & BUILTIN ) {
$level = '' if $level =~ /none!?/;
$builtinops{$action}->( $chainref, $level, $tag, $param );
return 0;
}
if ( $type & MANGLE_TABLE ) {
fatal_error "Action $action may only be used in the mangle file" unless $chainref->{table} eq 'mangle';
} else {
fatal_error "Action $action may not be used in the mangle file" if $chainref->{table} eq 'mangle';
}
my $actionfile = find_file "action.$action";
fatal_error "Missing Action File ($actionfile)" unless -f $actionfile;
@ -1818,47 +1827,130 @@ sub process_action(\$\$$) {
my $save_comment = push_comment;
while ( read_a_line( NORMAL_READ ) ) {
if ( $type & MANGLE_TABLE ) {
my ( $originalmark, $source, $dest, $protos, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time );
my ($target, $source, $dest, $proto, $ports, $sports, $origdest, $rate, $user, $mark, $connlimit, $time, $headers, $condition, $helper );
if ( $family == F_IPV4 ) {
( $originalmark, $source, $dest, $protos, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $probability, $dscp, $state, $time ) =
split_line2( 'mangle file',
{ mark => 0,
action => 0,
source => 1,
dest => 2,
proto => 3,
dport => 4,
sport => 5,
user => 6,
test => 7,
length => 8,
tos => 9,
connbytes => 10,
helper => 11,
probability => 12 ,
scp => 13,
state => 14,
time => 15,
},
{},
16,
1 );
$headers = '-';
} else {
( $originalmark, $source, $dest, $protos, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability, $dscp, $state, $time ) =
split_line2( 'action file',
{ mark => 0,
action => 0,
source => 1,
dest => 2,
proto => 3,
dport => 4,
sport => 5,
user => 6,
test => 7,
length => 8,
tos => 9,
connbytes => 10,
helper => 11,
headers => 12,
probability => 13,
dscp => 14,
state => 15,
time => 16,
},
{},
17,
1 );
}
if ( $file_format == 1 ) {
fatal_error( "FORMAT-1 actions are no longer supported" );
fatal_error 'ACTION must be specified' if $originalmark eq '-';
if ( $originalmark eq 'DEFAULTS' ) {
default_action_params( $action, split_list $source, 'defaults' );
next;
}
for my $proto (split_list( $protos, 'Protocol' ) ) {
process_mangle_rule1( $chainref,
$originalmark,
$source,
$dest,
$proto,
$ports,
$sports,
$user,
$testval,
$length,
$tos ,
$connbytes,
$helper,
$headers,
$probability ,
$dscp ,
$state,
$time );
}
} else {
($target, $source, $dest, $proto, $ports, $sports, $origdest, $rate, $user, $mark, $connlimit, $time, $headers, $condition, $helper )
= split_line2( 'action file',
\%rulecolumns,
$action_commands,
undef,
1 );
my ($target, $source, $dest, $proto, $ports, $sports, $origdest, $rate, $user, $mark, $connlimit, $time, $headers, $condition, $helper );
if ( $file_format == 1 ) {
fatal_error( "FORMAT-1 actions are no longer supported" );
} else {
($target, $source, $dest, $proto, $ports, $sports, $origdest, $rate, $user, $mark, $connlimit, $time, $headers, $condition, $helper )
= split_line2( 'action file',
\%rulecolumns,
$action_commands,
undef,
1 );
}
fatal_error 'TARGET must be specified' if $target eq '-';
if ( $target eq 'DEFAULTS' ) {
default_action_params( $action, split_list $source, 'defaults' ), next if $file_format == 2;
fatal_error 'DEFAULTS only allowed in FORMAT-2 actions';
}
process_rule( $chainref,
'',
'',
$nolog ? $target : merge_levels( join(':', @actparms{'chain','loglevel','logtag'}), $target ),
'',
$source,
$dest,
$proto,
$ports,
$sports,
$origdest,
$rate,
$user,
$mark,
$connlimit,
$time,
$headers,
$condition,
$helper,
0 );
}
fatal_error 'TARGET must be specified' if $target eq '-';
if ( $target eq 'DEFAULTS' ) {
default_action_params( $action, split_list $source, 'defaults' ), next if $file_format == 2;
fatal_error 'DEFAULTS only allowed in FORMAT-2 actions';
}
process_rule( $chainref,
'',
'',
$nolog ? $target : merge_levels( join(':', @actparms{'chain','loglevel','logtag'}), $target ),
'',
$source,
$dest,
$proto,
$ports,
$sports,
$origdest,
$rate,
$user,
$mark,
$connlimit,
$time,
$headers,
$condition,
$helper,
0 );
}
pop_comment( $save_comment );
@ -1980,7 +2072,9 @@ sub process_actions() {
$opts |= $options{$_};
}
$type = INLINE if $opts & INLINE_OPT;
unless ( $type & INLINE ) {
$type = INLINE if $opts & INLINE_OPT;
}
}
fatal_error "Conflicting OPTIONS ($options)" if ( $opts & NOINLINE_OPT && $type == INLINE ) || ( $opts & INLINE_OPT && $opts & BUILTIN_OPT );
@ -2020,7 +2114,9 @@ sub process_actions() {
make_terminating( $action ) if $opts & TERMINATING_OPT
} else {
fatal_error "Table names are only allowed for builtin actions" if $opts & ( MANGLE_OPT | RAW_OPT | NAT_OPT | FILTER_OPT );
fatal_error "Only the 'mangle' and 'filter' table may be specified for non-builtin actions" if $opts & ( RAW_OPT | NAT_OPT );
$type |= MANGLE_TABLE if $opts & MANGLE_OPT;
new_action $action, $type, ( $opts & NOINLINE_OPT ) != 0 , ( $opts & NOLOG_OPT ) != 0;
@ -2028,7 +2124,10 @@ sub process_actions() {
fatal_error "Missing Action File ($actionfile)" unless -f $actionfile;
$inlines{$action} = { file => $actionfile, nolog => $opts & NOLOG_OPT } if $type == INLINE;
if ( $type & INLINE ) {
fatal_error "Mangle actions may not be inlined" if $type & MANGLE_TABLE;
$inlines{$action} = { file => $actionfile, nolog => $opts & NOLOG_OPT };
}
}
}
}
@ -3614,8 +3713,8 @@ sub process_rules() {
#
# Process a rule from the mangle file
#
sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
our ( $action, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time ) = @_;
sub process_mangle_rule1( $$$$$$$$$$$$$$$$$$ ) {
our ( $chainref, $action, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time ) = @_;
use constant {
PREROUTING => 1, #Actually tcpre
@ -3652,6 +3751,7 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
128 => 'PREROUTING',
);
our $inaction = defined $chainref;
our $target = '';
my $junk = '';
our $raw_matches = '';
@ -3668,6 +3768,7 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
our $ttl = 0;
my $fw = firewall_zone;
my $usergenerated;
my $actiontype;
sub handle_mark_param( $$ ) {
my ( $option, $marktype ) = @_;
@ -4222,14 +4323,57 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
}
},
},
);
my $actionref = {
defaultchain => 0,
allowedchains => ALLCHAINS ,
minparams => 0 ,
maxparams => 16 ,
function => sub() {
fatal_error "A chain desginator may not be specified within an action body" if $designator;
fatal_error q('$FW' may not be specified within an action body) if $chain;
#
# Create the action:level:tag:param tuple.
#
my $normalized_target = normalize_action( $cmd, '', $params );
fatal_error( "Action $cmd invoked Recursively (" . join( '->', map( external_name( $_ ), @actionstack , $normalized_target ) ) . ')' ) if $active{$cmd};
if ( my $ref = use_action( $normalized_target ) ) {
#
# First reference to this tuple
#
my $savestatematch = $statematch;
#
# process_action may modify both $normalized_target and $ref!!!
#
process_action( $normalized_target, $ref, $chain );
#
# Capture the name of the action chain
#
$target = $ref->{name};
} else {
#
# We've seen this tuple before
#
$target = $usedactions{$normalized_target}->{name};
}
}
};
#
# Function Body
#
if ( $inaction ) {
( $inaction , undef ) = split( /:/, $chainref->{name}, 2 ) if $chainref->{action};
$chain = $chainref->{name};
$restriction = $chainref->{restriction} || 0;
}
( $cmd, $designator ) = split_action( $action );
if ( supplied $designator ) {
fatal_error "A chain designator may not be specified in an action body" if $inaction;
my $temp = $designators{$designator};
fatal_error "Invalid chain designator ( $designator )" unless $temp;
$designator = $temp;
@ -4237,9 +4381,14 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
( $cmd , $params ) = get_target_param1( $cmd );
$actiontype = $builtin_target{$cmd} || $targets{$cmd};
my $commandref = $commands{$cmd};
fatal_error "Invalid ACTION ($cmd)" unless $commandref;
unless ( $commandref ) {
fatal_error "Invalid ACTION ($cmd)" unless $actiontype & ACTION;
$commandref = $actionref;
}
if ( $cmd eq 'INLINE' ) {
( $target, $cmd, $params, $junk, $raw_matches ) = handle_inline( MANGLE_TABLE, 'mangle', $action, $cmd, $params, '' );
@ -4294,6 +4443,7 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
fatal_error "The $cmd ACTION requires at least $commandref->{maxparams} parmeters";
}
}
if ( $state ne '-' ) {
my @state = split_list( $state, 'state' );
my %state = %validstates;
@ -4317,11 +4467,13 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$ ) {
$chain ||= $commandref->{defaultchain};
$chain ||= $default_chain;
fatal_error "$cmd rules are not allowed in the $chainlabels{$chain} chain" unless $chain & $commandref->{allowedchains};
unless ( $inaction ) {
fatal_error "$cmd rules are not allowed in the $chainlabels{$chain} chain" unless $commandref->{allowedchains};
$chain = $chainnames{$chain};
$chainref = ensure_chain( 'mangle', $chain );
}
$chain = $chainnames{$chain};
if ( ( my $result = expand_rule( ensure_chain( 'mangle' , $chain ) ,
if ( ( my $result = expand_rule( $chainref ,
( $restrictions{$chain} || 0 ) | $restriction,
'',
do_proto( $proto, $ports, $sports) . $matches .
@ -4570,7 +4722,8 @@ sub process_tc_rule( ) {
}
}
sub process_mangle_rule( ) {
sub process_mangle_rule( $ ) {
my ( $chainref ) = @_;
my ( $originalmark, $source, $dest, $protos, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time );
if ( $family == F_IPV4 ) {
( $originalmark, $source, $dest, $protos, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $probability, $dscp, $state, $time ) =
@ -4625,7 +4778,7 @@ sub process_mangle_rule( ) {
}
for my $proto (split_list( $protos, 'Protocol' ) ) {
process_mangle_rule1( $originalmark, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time );
process_mangle_rule1( $chainref, $originalmark, $source, $dest, $proto, $ports, $sports, $user, $testval, $length, $tos , $connbytes, $helper, $headers, $probability , $dscp , $state, $time );
}
}

2
Shorewall/Perl/Shorewall/Tc.pm
View File

@ -2269,7 +2269,7 @@ sub setup_tc( $ ) {
first_entry "$doing $fn...";
process_mangle_rule while read_a_line( NORMAL_READ );
process_mangle_rule(undef) while read_a_line( NORMAL_READ );
}
if ( my $fn = open_file( 'secmarks', 1, 1 ) ) {