forked from extern/shorewall_code
Allow a protocol to be associated with an action
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
4fc572f664
commit
6ba1d5413b
@ -12,7 +12,6 @@ DEFAULTS ACCEPT
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@1 - - icmp fragmentation-needed {comment="Needed ICMP types"}
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@1 - - icmp time-exceeded {comment="Needed ICMP types"}
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?else
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CONTINUE - - !ipv6-icmp
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?COMMENT Needed ICMP types (RFC4890)
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@1 - - ipv6-icmp destination-unreachable
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@1 - - ipv6-icmp packet-too-big
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@ -927,6 +927,28 @@ sub process_policies()
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#
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sub process_inline ($$$$$$$$$$$$$$$$$$$$$$);
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#
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# Determine the protocol to be used in the jump to the passed action
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#
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sub determine_action_protocol( $$ ) {
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my ( $action, $proto ) = @_;
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if ( my $actionproto = $actions{$action}{proto} ) {
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if ( $proto eq '-' ) {
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$proto = $actionproto;
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} else {
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if ( defined( my $protonum = resolve_proto( $proto ) ) ) {
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fatal_error( "The $action action is only usable with " . proto_name( $actionproto ) ) unless $actionproto == $protonum;
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$proto = $protonum;
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} else {
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fatal_error( "Unknown protocol ($proto)" );
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}
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}
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}
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$proto;
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}
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sub add_policy_rules( $$$$$ ) {
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my ( $chainref , $target, $loglevel, $pactions, $dropmulticast ) = @_;
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@ -944,7 +966,11 @@ sub add_policy_rules( $$$$$ ) {
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#
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# Default action is a regular action -- jump to the action chain
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#
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add_ijump $chainref, j => use_policy_action( $paction, $chainref->{name} );
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if ( ( my $proto = determine_action_protocol( $action, '-' ) ) ne '-' ) {
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add_ijump( $chainref, j => use_policy_action( $paction, $chainref->{name} ), p => $proto );
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} else {
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add_ijump $chainref, j => use_policy_action( $paction, $chainref->{name} );
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}
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} else {
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#
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# Default action is an inline
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@ -1417,13 +1443,13 @@ sub external_name( $ ) {
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#
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# Define an Action
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#
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sub new_action( $$$$$ ) {
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sub new_action( $$$$$$ ) {
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my ( $action , $type, $options , $actionfile , $state ) = @_;
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my ( $action , $type, $options , $actionfile , $state, $proto ) = @_;
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fatal_error "Invalid action name($action)" if reserved_name( $action );
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$actions{$action} = { file => $actionfile, actchain => '' , type => $type, options => $options , state => $state };
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$actions{$action} = { file => $actionfile, actchain => '' , type => $type, options => $options , state => $state, proto => $proto };
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$targets{$action} = $type;
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}
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@ -2049,6 +2075,7 @@ sub process_actions() {
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my $opts = $type == INLINE ? NOLOG_OPT : 0;
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my $state = '';
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my $proto = 0;
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if ( $action =~ /:/ ) {
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warning_message 'Default Actions are now specified in /etc/shorewall/shorewall.conf';
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@ -2065,6 +2092,8 @@ sub process_actions() {
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} else {
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fatal_error( q(The 'state' option is reserved for use in the actions.std file) );
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}
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} elsif ( /^proto=(.+)$/ ) {
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fatal_error "Unknown Protocol ($1)" unless defined( $proto = resolve_proto( $1 ) );
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} else {
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fatal_error "Invalid option ($_)" unless $options{$_};
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$opts |= $options{$_};
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@ -2097,6 +2126,8 @@ sub process_actions() {
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}
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if ( $opts & BUILTIN_OPT ) {
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warning_message( "The 'proto' option has no effect when specified on a builtin action" ) if $proto;
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my $actiontype = USERBUILTIN | OPTIONS;
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$actiontype |= MANGLE_TABLE if $opts & MANGLE_OPT;
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$actiontype |= RAW_TABLE if $opts & RAW_OPT;
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@ -2129,7 +2160,7 @@ sub process_actions() {
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fatal_error "Missing Action File ($actionfile)" unless -f $actionfile;
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new_action ( $action, $type, $opts, $actionfile , $state );
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new_action ( $action, $type, $opts, $actionfile , $state , $proto );
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}
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}
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}
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@ -3012,6 +3043,10 @@ sub process_rule ( $$$$$$$$$$$$$$$$$$$$ ) {
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my $actionchain; # Name of the action chain
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if ( $actiontype & ACTION ) {
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#
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# Verify action 'proto', if any
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#
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$proto = determine_action_protocol( $basictarget, $proto );
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#
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# Save NAT-oriented column contents
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#
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@ -4736,6 +4771,10 @@ sub process_mangle_rule1( $$$$$$$$$$$$$$$$$$$ ) {
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function => sub() {
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fatal_error( qq(Action $cmd may not be used in the mangle file) ) unless $actiontype & MANGLE_TABLE;
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#
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# Verify action 'proto', if any
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#
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$proto = determine_action_protocol( $cmd, $proto );
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#
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# Create the action:level:tag:param tuple.
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#
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my $normalized_target = normalize_action( $cmd, '', $params );
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@ -5694,6 +5733,10 @@ sub process_snat1( $$$$$$$$$$$$ ) {
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if ( $actiontype & ACTION ) {
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fatal_error( qq(Action $target may not be used in the snat file) ) unless $actiontype & NAT_TABLE;
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#
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# Verify action 'proto', if any
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#
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$proto = determine_action_protocol( $target, $proto );
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#
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# Create the action:level:tag:param tuple. Since we don't allow logging out of nat POSTROUTING, we store
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# the interface name in the log tag
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#
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@ -26,18 +26,19 @@ Broadcast inline,audit # Handles Broadcast/Anycast
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?else
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Broadcast noinline,audit # Handles Broadcast/Anycast
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?endif
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DNSAmp # Matches one-question recursive DNS queries
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DNSAmp proto=17 # Matches one-question recursive DNS queries
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Drop # Default Action for DROP policy (deprecated)
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dropBcast inline # Silently Drop Broadcast
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dropBcasts inline # Silently Drop Broadcast
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dropInvalid inline # Drops packets in the INVALID conntrack state
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dropMcast inline # Silently Drop Multicast
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dropNotSyn noinline # Silently Drop Non-syn TCP packets
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DropDNSrep inline # Drops DNS replies
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dropNotSyn noinline,proto=6 # Silently Drop Non-syn TCP packets
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DropDNSrep inline,proto=17 # Drops DNS replies
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DropSmurfs noinline # Drop smurf packets
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Established inline,\ # Handles packets in the ESTABLISHED state
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state=ESTABLISHED #
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FIN inline,audit # Handles ACK,FIN,PSH packets
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FIN inline,audit,\ # Handles ACK,FIN,PSH packets
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proto=6
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forwardUPnP noinline # Allow traffic that upnpd has redirected from 'upnp' interfaces.
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GlusterFS inline # Handles GlusterFS
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IfEvent noinline # Perform an action based on an event
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@ -50,14 +51,16 @@ Multicast inline,audit # Handles Multicast
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Multicast noinline,audit # Handles Multicast
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?endif
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New inline,state=NEW # Handles packets in the NEW conntrack state
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NotSyn inline,audit # Handles TCP packets which do not have SYN=1 and ACK=0
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rejNotSyn noinline # Silently Reject Non-syn TCP packets
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NotSyn inline,audit,\ # Handles TCP packets which do not have SYN=1 and ACK=0
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proto=6
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rejNotSyn noinline,proto=6 # Silently Reject Non-syn TCP packets
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Reject # Default Action for REJECT policy (deprecated)
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Related inline,\ # Handles packets in the RELATED conntrack state
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state=RELATED #
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ResetEvent inline # Reset an Event
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RST inline,audit # Handle packets with RST set
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RST inline,audit,\ # Handle packets with RST set
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proto=6
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SetEvent inline # Initialize an event
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TCPFlags # Handle bad flag combinations.
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TCPFlags proto=6 # Handle bad flag combinations.
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Untracked inline,\ # Handles packets in the UNTRACKED conntrack state
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state=UNTRACKED #
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@ -191,6 +191,27 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>proto</option>=<replaceable>protocol</replaceable></term>
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<listitem>
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<para>Added in Shorewall 5.1.10. Specifies that the action is
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only usable with the specified
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<replaceable>protocol</replaceable> (name or number). When the
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action is invoked with no protocol specified in the PROTO
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column, or if the action is used as a Policy Action, the named
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<replaceable>protocol</replaceable> will be assumed. If a
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protocol is specified in the PROTO column of an invocation,
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then it must match the named
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<replaceable>protocol</replaceable>.</para>
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<para>The <option>proto</option> option has no effect if the
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<option>inline</option> or <option>builtin</option> option is
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specified. A warning is issued if <option>proto</option> is
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specified along with <option>builtin</option>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>section</option></term>
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@ -8,42 +8,43 @@
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#
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###############################################################################
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#ACTION
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A_Drop # Audited Default Action for DROP policy
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A_Reject # Audited Default Action for REJECT policy
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A_AllowICMPs # Audited Accept needed ICMP6 types
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AllowICMPs # Accept needed ICMP6 types
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A_Drop # Audited Default Action for DROP policy
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A_Reject # Audited Default Action for REJECT policy
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A_AllowICMPs proto=58 # Audited Accept needed ICMP6 types
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AllowICMPs proto=58 # Accept needed ICMP6 types
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allowBcast inline # Silently Allow Broadcast
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allowInvalid inline # Accepts packets in the INVALID conntrack state
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allowMcast inline # Silently Allow Multicast
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AutoBL noinline # Auto-blacklist IPs that exceed thesholds
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AutoBLL noinline # Helper for AutoBL
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AutoBL noinline # Auto-blacklist IPs that exceed thesholds
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AutoBLL noinline # Helper for AutoBL
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BLACKLIST logjump,section # Add sender to the dynamic blacklist
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Broadcast noinline # Handles Broadcast/Anycast
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Drop # Default Action for DROP policy (deprecated)
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Broadcast noinline # Handles Broadcast/Anycast
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Drop # Default Action for DROP policy (deprecated)
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dropBcast inline # Silently Drop Broadcast
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dropBcasts inline # Silently Drop Broadcast
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dropInvalid inline # Drops packets in the INVALID conntrack state
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dropMcast inline # Silently Drop Multicast
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dropNotSyn noinline # Silently Drop Non-syn TCP packets
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DropDNSrep inline # Drops DNS replies
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DropSmurfs noinline # Handles packets with a broadcast source address
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dropNotSyn noinline,proto=6 # Silently Drop Non-syn TCP packets
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DropDNSrep inline,proto=17 # Drops DNS replies
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DropSmurfs noinline # Handles packets with a broadcast source address
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Established inline,\ # Handles packets in the ESTABLISHED state
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state=ESTABLISHED
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FIN inline,audit # Handles ACK,FIN,PSH packets
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FIN inline,audit,\ # Handles ACK,FIN,PSH packets
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proto=6
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forwardUPnP noinline # Allow traffic that upnpd has redirected from 'upnp' interfaces.
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IfEvent noinline # Perform an action based on an event
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Invalid inline,audit,\ # Handles packets in the INVALID conntrack state
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state=INVALID
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Multicast noinline # Handles Multicast
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IfEvent noinline # Perform an action based on an event
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Invalid inline,audit,\ # Handles packets in the INVALID conntrack state
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state=INVALID
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Multicast noinline # Handles Multicast
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New inline,state=NEW # Handles packets in the NEW conntrack state
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NotSyn inline # Handles TCP packets that do not have SYN=1 and ACK=0
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Reject # Default Action for REJECT policy (deprecated)
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rejNotSyn noinline # Silently Reject Non-syn TCP packets
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Related inline,\ # Handles packets in the RELATED conntrack state
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state=RELATED
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NotSyn inline,proto=6 # Handles TCP packets that do not have SYN=1 and ACK=0
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Reject # Default Action for REJECT policy (deprecated)
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rejNotSyn noinline,proto=6 # Silently Reject Non-syn TCP packets
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Related inline,\ # Handles packets in the RELATED conntrack state
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state=RELATED
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ResetEvent inline # Reset an Event
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RST inline # Handle packets with RST set
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RST inline,proto=6 # Handle packets with RST set
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SetEvent inline # Initialize an event
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TCPFlags # Handles bad flags combinations
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Untracked inline,\ # Handles packets in the UNTRACKED conntrack state
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TCPFlags proto=6 # Handles bad flags combinations
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Untracked inline,\ # Handles packets in the UNTRACKED conntrack state
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state=UNTRACKED
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