Cache list of plugin names to further simplify its usage.

Also helpful for ipsec statusall to avoid having to enumerate plugins.

src/libcharon/daemon.c

@@ -201,18 +201,6 @@ METHOD(daemon_t, start, void,
 											   DEFAULT_THREADS));
 }
 
-/**
- * Log loaded plugins
- */
-static void print_plugins()
-{
-	char *plugins;
-
-	plugins = lib->plugins->loaded_plugins(lib->plugins);
-	DBG1(DBG_DMN, "loaded plugins: %s", plugins);
-	free(plugins);
-}
-
 METHOD(daemon_t, initialize, bool,
 	private_daemon_t *this)
 {
@@ -233,8 +221,8 @@ METHOD(daemon_t, initialize, bool,
 	{
 		return FALSE;
 	}
-
-	print_plugins();
+	DBG1(DBG_DMN, "loaded plugins: %s",
+		 lib->plugins->loaded_plugins(lib->plugins));
 
 	this->public.ike_sa_manager = ike_sa_manager_create();
 	if (this->public.ike_sa_manager == NULL)

src/libcharon/plugins/stroke/stroke_list.c

@@ -414,8 +414,7 @@ METHOD(stroke_list_t, status, void,
 	if (all)
 	{
 		peer_cfg_t *peer_cfg;
-		plugin_t *plugin;
-		char *pool, *plugins;
+		char *pool;
 		host_t *host;
 		u_int32_t dpd;
 		time_t since, now;
@@ -449,9 +448,8 @@ METHOD(stroke_list_t, status, void,
 		}
 		fprintf(out, ", scheduled: %d\n",
 				lib->scheduler->get_job_load(lib->scheduler));
-		plugins = lib->plugins->loaded_plugins(lib->plugins);
-		fprintf(out, "  loaded plugins: %s\n", plugins);
-		free(plugins);
+		fprintf(out, "  loaded plugins: %s\n",
+				lib->plugins->loaded_plugins(lib->plugins));
 
 		first = TRUE;
 		enumerator = this->attribute->create_pool_enumerator(this->attribute);

src/libstrongswan/plugins/plugin_loader.c

@@ -45,6 +45,11 @@ struct private_plugin_loader_t {
 	 * List of plugins, as plugin_entry_t
 	 */
 	linked_list_t *plugins;
+
+	/**
+	 * List of names of loaded plugins
+	 */
+	char *loaded_plugins;
 };
 
 /**
@@ -203,6 +208,38 @@ METHOD(plugin_loader_t, create_plugin_enumerator, enumerator_t*,
 							(void*)plugin_filter, NULL, NULL);
 }
 
+/**
+ * Create a list of the names of all loaded plugins
+ */
+static char* loaded_plugins_list(private_plugin_loader_t *this)
+{
+	int buf_len = 128, len = 0;
+	char *buf, *name;
+	enumerator_t *enumerator;
+	plugin_t *plugin;
+
+	buf = malloc(buf_len);
+	buf[0] = '\0';
+	enumerator = create_plugin_enumerator(this);
+	while (enumerator->enumerate(enumerator, &plugin, NULL))
+	{
+		name = plugin->get_name(plugin);
+		if (len + (strlen(name) + 1) >= buf_len)
+		{
+			buf_len <<= 1;
+			buf = realloc(buf, buf_len);
+		}
+		len += snprintf(&buf[len], buf_len - len, "%s ", name);
+	}
+	enumerator->destroy(enumerator);
+	if (len > 0 && buf[len - 1] == ' ')
+	{
+		buf[len - 1] = '\0';
+	}
+	return buf;
+}
+
+
 /**
  * Check if a plugin is already loaded
  */
@@ -516,6 +553,11 @@ METHOD(plugin_loader_t, load_plugins, bool,
 		/* unload plugins that we were not able to load any features for */
 		purge_plugins(this);
 	}
+	if (!critical_failed)
+	{
+		free(this->loaded_plugins);
+		this->loaded_plugins = loaded_plugins_list(this);
+	}
 	return !critical_failed;
 }
 
@@ -558,6 +600,8 @@ METHOD(plugin_loader_t, unload, void,
 		}
 		enumerator->destroy(enumerator);
 	}
+	free(this->loaded_plugins);
+	this->loaded_plugins = NULL;
 }
 
 /**
@@ -609,25 +653,7 @@ METHOD(plugin_loader_t, reload, u_int,
 METHOD(plugin_loader_t, loaded_plugins, char*,
 	private_plugin_loader_t *this)
 {
-#define BUF_LEN 512
-	char *buf = malloc(BUF_LEN);
-	int len = 0;
-	enumerator_t *enumerator;
-	plugin_t *plugin;
-
-	buf[0] = '\0';
-	enumerator = create_plugin_enumerator(this);
-	while (len < BUF_LEN && enumerator->enumerate(enumerator, &plugin, NULL))
-	{
-		len += snprintf(&buf[len], BUF_LEN - len, "%s ",
-						plugin->get_name(plugin));
-	}
-	enumerator->destroy(enumerator);
-	if (len > 0 && buf[len - 1] == ' ')
-	{
-		buf[len - 1] = '\0';
-	}
-	return buf;
+	return this->loaded_plugins ?: "";
 }
 
 METHOD(plugin_loader_t, destroy, void,
@@ -635,6 +661,7 @@ METHOD(plugin_loader_t, destroy, void,
 {
 	unload(this);
 	this->plugins->destroy(this->plugins);
+	free(this->loaded_plugins);
 	free(this);
 }
 

src/libstrongswan/plugins/plugin_loader.h

@@ -71,7 +71,9 @@ struct plugin_loader_t {
 	/**
 	 * Get a simple list the names of all loaded plugins.
 	 *
-	 * @return				list of the names of all loaded plugins (allocated)
+	 * The function returns internal data, do not free.
+	 *
+	 * @return				list of the names of all loaded plugins
 	 */
 	char* (*loaded_plugins)(plugin_loader_t *this);
 

src/pki/command.c

@@ -179,9 +179,8 @@ int command_usage(char *error)
 
 	if (active == help_idx)
 	{
-		char *plugins = lib->plugins->loaded_plugins(lib->plugins);
-		fprintf(out, "loaded plugins: %s\n", plugins);
-		free(plugins);
+		fprintf(out, "loaded plugins: %s\n",
+				lib->plugins->loaded_plugins(lib->plugins));
 	}
 
 	fprintf(out, "usage:\n");

src/pluto/log.c

@@ -868,11 +868,8 @@ DBG_dump(const char *label, const void *p, size_t len)
 
 static void show_loaded_plugins()
 {
-	char *plugins;
-
-	plugins = lib->plugins->loaded_plugins(lib->plugins);
-	whack_log(RC_COMMENT, "loaded plugins: %s", plugins);
-	free(plugins);
+	whack_log(RC_COMMENT, "loaded plugins: %s",
+			  lib->plugins->loaded_plugins(lib->plugins));
 }
 
 void show_status(bool all, const char *name)

src/pluto/plutomain.c

@@ -264,18 +264,6 @@ static const char *pkcs11_init_args = NULL;
 /* options read by optionsfrom */
 options_t *options;
 
-/**
- * Log loaded plugins
- */
-static void print_plugins()
-{
-	char *plugins;
-
-	plugins = lib->plugins->loaded_plugins(lib->plugins);
-	DBG1(DBG_DMN, "loaded plugins: %s", plugins);
-	free(plugins);
-}
-
 int main(int argc, char **argv)
 {
 	bool fork_desired = TRUE;
@@ -693,7 +681,8 @@ int main(int argc, char **argv)
 	{
 		exit(SS_RC_INITIALIZATION_FAILED);
 	}
-	print_plugins();
+	DBG1(DBG_DMN, "loaded plugins: %s",
+		 lib->plugins->loaded_plugins(lib->plugins));
 
 	init_builder();
 	if (!init_secret() || !init_crypto())

src/scepclient/scepclient.c

@@ -275,18 +275,6 @@ usage(const char *message)
 	exit_scepclient(message);
 }
 
-/**
- * Log loaded plugins
- */
-static void print_plugins()
-{
-	char *plugins;
-
-	plugins = lib->plugins->loaded_plugins(lib->plugins);
-	DBG1(DBG_LIB, "  loaded plugins: %s", plugins);
-	free(plugins);
-}
-
 /**
  * @brief main of scepclient
  *
@@ -752,7 +740,8 @@ int main(int argc, char **argv)
 	{
 		exit_scepclient("plugin loading failed");
 	}
-	print_plugins();
+	DBG1(DBG_LIB, "  loaded plugins: %s",
+		 lib->plugins->loaded_plugins(lib->plugins));
 
 	if ((filetype_out == 0) && (!request_ca_certificate))
 	{