Imported Upstream version 5.1.0

1 files changed, 36 insertions, 5 deletions

diff --git a/src/libcharon/plugins/farp/farp_plugin.c b/src/libcharon/plugins/farp/farp_plugin.c
index a30c11962..4b74da3b9 100644
--- a/src/libcharon/plugins/farp/farp_plugin.c
+++ b/src/libcharon/plugins/farp/farp_plugin.c
@@ -49,11 +49,38 @@ METHOD(plugin_t, get_name, char*,
 	return "farp";
 }
 
+/**
+ * Register listener
+ */
+static bool plugin_cb(private_farp_plugin_t *this,
+					  plugin_feature_t *feature, bool reg, void *cb_data)
+{
+	if (reg)
+	{
+		charon->bus->add_listener(charon->bus, &this->listener->listener);
+	}
+	else
+	{
+		charon->bus->remove_listener(charon->bus, &this->listener->listener);
+	}
+	return TRUE;
+}
+
+METHOD(plugin_t, get_features, int,
+	private_farp_plugin_t *this, plugin_feature_t *features[])
+{
+	static plugin_feature_t f[] = {
+		PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
+			PLUGIN_PROVIDE(CUSTOM, "farp"),
+	};
+	*features = f;
+	return countof(f);
+}
+
 METHOD(plugin_t, destroy, void,
 	private_farp_plugin_t *this)
 {
 	DESTROY_IF(this->spoofer);
-	charon->bus->remove_listener(charon->bus, &this->listener->listener);
 	this->listener->destroy(this->listener);
 	free(this);
 }
@@ -65,19 +92,24 @@ plugin_t *farp_plugin_create()
 {
 	private_farp_plugin_t *this;
 
+	if (!lib->caps->keep(lib->caps, CAP_NET_RAW))
+	{	/* required to open ARP socket (AF_PACKET). according to capabilities(7)
+		 * it is also require to use the socket */
+		DBG1(DBG_NET, "farp plugin requires CAP_NET_RAW capability");
+		return NULL;
+	}
+
 	INIT(this,
 		.public = {
 			.plugin = {
 				.get_name = _get_name,
-				.reload = (void*)return_false,
+				.get_features = _get_features,
 				.destroy = _destroy,
 			},
 		},
 		.listener = farp_listener_create(),
 	);
 
-	charon->bus->add_listener(charon->bus, &this->listener->listener);
-
 	this->spoofer = farp_spoofer_create(this->listener);
 	if (!this->spoofer)
 	{
@@ -86,4 +118,3 @@ plugin_t *farp_plugin_create()
 	}
 	return &this->public.plugin;
 }
-