[__bird_radv] fix MTU setting, link routing tables to __object_id, add preference parameters

type/__bird_radv/man.rst

@@ -26,6 +26,13 @@ OPTIONAL PARAMETERS
 mtu
   An optional MTU setting to include in the router advertisements.
 
+default-preference
+  This option specifies the Default Router Preference value to advertise to
+  hosts. Default: medium.
+
+route-preference
+  This option specifies the default value of advertised route preference for
+  specific routes. Default: medium.
 
 OPTIONAL MULTIPLE PARAMETERS
 ----------------------------

type/__bird_radv/manifest

@@ -58,27 +58,41 @@ fi
 MTU=
 if [ -f "${__object:?}/parameter/mtu" ];
 then
-	MTU="link mtu $(cat "${__object:?}/parameter/mtu")"
+	MTU="link mtu $(cat "${__object:?}/parameter/mtu");"
+fi
+
+DEFAULT_PREFERENCE=
+if [ -f "${__object:?}/parameter/default-preference" ];
+then
+	DEFAULT_PREFERENCE="default preference $(cat "${__object:?}/parameter/default-preference");"
+fi
+
+ROUTE_PREFERENCE=
+if [ -f "${__object:?}/parameter/route-preference" ];
+then
+	ROUTE_PREFERENCE="route preference $(cat "${__object:?}/parameter/route-preference");"
 fi
 
 __file "${confdir:?}/radv-${__object_id:?}.conf" \
 	--mode 0640 --owner root --group bird \
 	--source - << EOF
-ipv6 table radv_routes;
+ipv6 table radv_routes_${__object_id};
 
 protocol static {
 	description "Routes advertised via RAs";
-	ipv6 { table radv_routes; };
+	ipv6 { table radv_routes_${__object_id}; };
 
 $(sed -e 's/^/\troute /' -e 's/$/ unreachable;/' "${__object:?}/parameter/route")
 }
 
 protocol radv ${__object_id:?} {
 	propagate routes ${have_routes:?};
-	ipv6 { table radv_routes; export all; };
+	ipv6 { table radv_routes_${__object_id}; export all; };
 
 	interface "$(cat "${__object:?}/parameter/interface")" {
 	$MTU
+	$DEFAULT_PREFERENCE
+	$ROUTE_PREFERENCE
 	};
 
 $RDNS

type/__bird_radv/parameter/optional

@@ -1 +1,3 @@
 mtu
+default-preference
+route-preference