Allow adding IPv6 addresses to keepalived groups, and optionally use IPv6 for the signalling protocol

interface-templates/vrrp/vrrp-group/node.tag/multicast-on-ipv6/node.def

@@ -0,0 +1,3 @@
+type: bool
+help: Send multicasts over IPv6 instead of IPv4
+default: true

interface-templates/vrrp/vrrp-group/node.tag/virtual-address/node.def

@@ -1,9 +1,11 @@
 multi:
-type: ipv4,ipv4net
+type: txt
 help: Virtual address [REQUIRED]
 
 syntax:expression: exec "
        if [[ '$VAR(@)' == '*/' ]]; then /opt/vyatta/sbin/valid_address $VAR(@); fi"
 
 val_help: ipv4; Virtual IP address (up to 20 per group)
 val_help: ipv4net; Virtual IP address with prefix (up to 20 per group)
+val_help: ipv6; Virtual IPv6 address (up to 20 per group)
+val_help: ipv6net; Virtual IPv6 address with prefix (up to 20 per group)

scripts/vyatta-keepalived.pl

@@ -145,6 +145,11 @@ sub keepalived_get_values {
       next;
     }
 
+    my $multicast_on_ipv6 = 0;
+    if ($config->exists("multicast-on-ipv6")) {
+        $multicast_on_ipv6 = 1;
+    }
+
     my $use_vmac = 0;
     my $transition_intf = $intf;
     if ( $config->exists("rfc3768-compatibility") ) {
@@ -275,6 +280,9 @@ sub keepalived_get_values {
     $output .= "\tstate $init_state\n";
     $output .= "\tinterface $intf\n";
     $output .= "\tvirtual_router_id $group\n";
+    if ($multicast_on_ipv6) {
+        $output .= "\tnative_ipv6\n";
+    }
     if ($use_vmac) {
 	$output .= "\tuse_vmac $intf";
 	$output .= "v";