Cleanup if IPv6 provider work

Signed-off-by: Tom Eastep <teastep@shorewall.net>

Shorewall/Perl/Shorewall/Providers.pm

@@ -217,6 +217,9 @@ sub balance_default_route( $$$$ ) {
 		emit "DEFAULT_ROUTE=\"nexthop dev $interface weight $weight $realm\"";
 	    }
 	} else {
+	    #
+	    # IPv6 doesn't support multi-hop routes
+	    #
 	    if ( $gateway ) {
 		emit "DEFAULT_ROUTE=\"via $gateway dev $interface $realm\"";
 	    } else {
@@ -251,6 +254,9 @@ sub balance_fallback_route( $$$$ ) {
 		emit "FALLBACK_ROUTE=\"nexthop dev $interface weight $weight $realm\"";
 	    }
 	} else {
+	    #
+	    # IPv6 doesn't support multi-hop routes
+	    #
 	    if ( $gateway ) {
 		emit "FALLBACK_ROUTE=\"via $gateway dev $interface $realm\"";
 	    } else {
@@ -657,6 +663,9 @@ sub add_a_provider( $$ ) {
 		    emit qq(add_gateway "nexthop dev $physical weight $weight $realm" ) . $tbl;
 		}
 	    } else {
+		#
+		# IPv6 doesn't support multi-hop routes
+		#
 		if ( $gateway ) {
 		    emit qq(add_gateway "via $gateway dev $physical $realm" ) . $tbl;
 		} else {
@@ -737,7 +746,7 @@ sub add_a_provider( $$ ) {
 		$via = "dev $physical";
 	    }
 
-	    $via .= " weight $weight" unless $weight < 0 or $family == F_IPV6;
+	    $via .= " weight $weight" unless $weight < 0 or $family == F_IPV6; # IPv6 doesn't support route weights
 	    $via .= " $realm"         if $realm;
 
 	    emit( qq(delete_gateway "$via" $tbl $physical) );

Shorewall/Perl/prog.footer6

@@ -5,7 +5,21 @@
 # Give Usage Information
 #
 usage() {
-    echo "Usage: $0 [ options ] [ start|stop|clear|down|reset|refresh|restart|status|up|version ]"
+    echo "Usage: $0 [ options ] <command>"
+    echo
+    echo "<command> is one of:"
+    echo "   start"
+    echo "   stop"
+    echo "   clear"
+    echo "   disable <interface>"
+    echo "   down <interface>"
+    echo "   enable <interface>"
+    echo "   reset"
+    echo "   refresh"
+    echo "   restart"
+    echo "   status"
+    echo "   up <interface>"
+    echo "   version"
     echo
     echo "Options are:"
     echo
@@ -330,6 +344,26 @@ case "$COMMAND" in
 	updown $1
 	status=0
 	;;
+    enable)
+	[ $# -eq 1 ] && exit 0
+	shift
+	[ $# -ne 1 ] && usage 2
+	if shorewall6_is_started; then
+	    detect_configuration
+	    enable_provider $1
+	fi
+	status=0
+	;;
+    disable)
+	[ $# -eq 1 ] && exit 0
+	shift
+	[ $# -ne 1 ] && usage 2
+	if shorewall6_is_started; then
+	    detect_configuration
+	    disable_provider $1
+	fi
+	status=0
+	;;
     version)
 	[ $# -ne 1 ] && usage 2
 	echo $SHOREWALL_VERSION

Shorewall/Perl/prog.header6

@@ -196,6 +196,35 @@ find_interface_full_addresses() # $1 = interface
     $IP -f inet6 addr show $1 2> /dev/null | grep 'inet6 ' | sed 's/\s*inet6 //;s/ scope.*//;s/ peer.*//'
 }
 
+#
+# Add an additional gateway to the default route
+#
+add_gateway() # $1 = Delta $2 = Table Number
+{
+    local route
+    local weight
+    local delta
+    local dev
+    
+    run_ip route add default scope global table $2 $1
+}
+
+#
+# Remove a gateway from the default route
+#
+delete_gateway() # $! = Description of the Gateway $2 = table number $3 = device
+{
+    local route
+    local gateway
+    local dev
+
+    route=`$IP -6 -o route ls table $2 | grep ^default | sed 's/[\]//g'`
+    gateway=$1
+  
+    dev=$(find_device $route)
+    [ "$dev" = "$3" ] && run_ip route delete default table $2
+}
+
 #
 #  echo the list of networks routed out of a given interface
 #

manpages6/shorewall6-providers.xml

@@ -141,6 +141,30 @@
           embedded whitespace.</para>
 
           <variablelist>
+            <varlistentry>
+              <term><emphasis role="bold">balance</emphasis></term>
+
+              <listitem>
+                <para>Added in Shorewall 4.4.25. Causes a default route to
+                this provider's gateway to be added to the <emphasis
+                role="bold">main</emphasis> routing table (USE_DEFAULT_RT=No)
+                or to the <emphasis role="bold">balance</emphasis> routing
+                table (USE_DEFAULT_RT=Yes). At most one provider can specify
+                this option.</para>
+              </listitem>
+            </varlistentry>
+
+            <varlistentry>
+              <term><emphasis role="bold">fallback</emphasis></term>
+
+              <listitem>
+                <para>Added in Shorewall 4.4.25. Causes a default route to
+                this provider's gateway to be added to the <emphasis
+                role="bold">default</emphasis> routing table.At most one
+                provider can specify this option.</para>
+              </listitem>
+            </varlistentry>
+
             <varlistentry>
               <term><emphasis role="bold">track</emphasis></term>