Use a string to identify xauth backends, no need for integer types

src/libcharon/plugins/xauth_null/xauth_null.c

@@ -72,12 +72,6 @@ METHOD(xauth_method_t, initiate_server, status_t,
 	return NEED_MORE;
 }
 
-METHOD(xauth_method_t, get_type, xauth_type_t,
-	private_xauth_null_t *this, u_int32_t *vendor)
-{
-	return XAUTH_NULL;
-}
-
 METHOD(xauth_method_t, destroy, void,
 	private_xauth_null_t *this)
 {
@@ -89,7 +83,7 @@ METHOD(xauth_method_t, destroy, void,
  * Described in header.
  */
 xauth_null_t *xauth_null_create_peer(identification_t *server,
-										 identification_t *peer)
+									 identification_t *peer)
 {
 	private_xauth_null_t *this;
 
@@ -98,7 +92,6 @@ xauth_null_t *xauth_null_create_peer(identification_t *server,
 			.xauth_method = {
 				.initiate = _initiate_peer,
 				.process = _process_peer,
-				.get_type = _get_type,
 				.destroy = _destroy,
 			},
 		},
@@ -121,7 +114,6 @@ xauth_null_t *xauth_null_create_server(identification_t *server,
 			.xauth_method = {
 				.initiate = _initiate_server,
 				.process = _process_server,
-				.get_type = _get_type,
 				.destroy = _destroy,
 			},
 		},

src/libcharon/plugins/xauth_null/xauth_null.h

@@ -44,7 +44,7 @@ struct xauth_null_t {
  * @return			xauth_null_t object
  */
 xauth_null_t *xauth_null_create_server(identification_t *server,
-										   identification_t *peer);
+									   identification_t *peer);
 
 /**
  * Creates the XAuth method XAuth NULL, acting as peer.
@@ -54,6 +54,6 @@ xauth_null_t *xauth_null_create_server(identification_t *server,
  * @return			xauth_null_t object
  */
 xauth_null_t *xauth_null_create_peer(identification_t *server,
-										 identification_t *peer);
+									 identification_t *peer);
 
 #endif /** XAUTH_NULL_H_ @}*/

src/libcharon/plugins/xauth_null/xauth_null_plugin.c

@@ -29,9 +29,9 @@ METHOD(plugin_t, get_features, int,
 {
 	static plugin_feature_t f[] = {
 		PLUGIN_CALLBACK(xauth_method_register, xauth_null_create_server),
-			PLUGIN_PROVIDE(XAUTH_SERVER, XAUTH_NULL),
+			PLUGIN_PROVIDE(XAUTH_SERVER, "null"),
 		PLUGIN_CALLBACK(xauth_method_register, xauth_null_create_peer),
-			PLUGIN_PROVIDE(XAUTH_PEER, XAUTH_NULL),
+			PLUGIN_PROVIDE(XAUTH_PEER, "null"),
 	};
 	*features = f;
 	return countof(f);