updown: Use plugin features to register listener and attribute handler
[strongswan.git] / src / libcharon / plugins / updown / updown_plugin.c
index 2ce2d32..3c1aba5 100644 (file)
 
 #include "updown_plugin.h"
 #include "updown_listener.h"
+#include "updown_handler.h"
 
 #include <daemon.h>
+#include <hydra.h>
 
 typedef struct private_updown_plugin_t private_updown_plugin_t;
 
@@ -34,6 +36,11 @@ struct private_updown_plugin_t {
         * Listener interface, listens to CHILD_SA state changes
         */
        updown_listener_t *listener;
+
+       /**
+        * Attribute handler, to pass DNS servers to updown
+        */
+       updown_handler_t *handler;
 };
 
 METHOD(plugin_t, get_name, char*,
@@ -42,11 +49,52 @@ METHOD(plugin_t, get_name, char*,
        return "updown";
 }
 
+/**
+ * Register listener
+ */
+static bool plugin_cb(private_updown_plugin_t *this,
+                                         plugin_feature_t *feature, bool reg, void *cb_data)
+{
+       if (reg)
+       {
+               if (lib->settings->get_bool(lib->settings,
+                                                                       "charon.plugins.updown.dns_handler", FALSE))
+               {
+                       this->handler = updown_handler_create();
+                       hydra->attributes->add_handler(hydra->attributes,
+                                                                                  &this->handler->handler);
+               }
+               this->listener = updown_listener_create(this->handler);
+               charon->bus->add_listener(charon->bus, &this->listener->listener);
+       }
+       else
+       {
+               charon->bus->remove_listener(charon->bus, &this->listener->listener);
+               this->listener->destroy(this->listener);
+               if (this->handler)
+               {
+                       this->handler->destroy(this->handler);
+                       hydra->attributes->remove_handler(hydra->attributes,
+                                                                                         &this->handler->handler);
+               }
+       }
+       return TRUE;
+}
+
+METHOD(plugin_t, get_features, int,
+       private_updown_plugin_t *this, plugin_feature_t *features[])
+{
+       static plugin_feature_t f[] = {
+               PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
+                       PLUGIN_PROVIDE(CUSTOM, "updown"),
+       };
+       *features = f;
+       return countof(f);
+}
+
 METHOD(plugin_t, destroy, void,
        private_updown_plugin_t *this)
 {
-       charon->bus->remove_listener(charon->bus, &this->listener->listener);
-       this->listener->destroy(this->listener);
        free(this);
 }
 
@@ -61,15 +109,11 @@ plugin_t *updown_plugin_create()
                .public = {
                        .plugin = {
                                .get_name = _get_name,
-                               .reload = (void*)return_false,
+                               .get_features = _get_features,
                                .destroy = _destroy,
                        },
                },
-               .listener = updown_listener_create(),
        );
 
-       charon->bus->add_listener(charon->bus, &this->listener->listener);
-
        return &this->public.plugin;
 }
-