merged the modularization branch (credentials) back to trunk

1 files changed, 129 insertions, 0 deletions

diff --git a/src/libstrongswan/plugins/plugin_loader.c b/src/libstrongswan/plugins/plugin_loader.c
new file mode 100644
index 000000000..215ed53d6
--- /dev/null
+++ b/src/libstrongswan/plugins/plugin_loader.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2007 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * $Id$
+ */
+
+#include "plugin_loader.h"
+
+#include <dlfcn.h>
+
+#include <debug.h>
+#include <utils/linked_list.h>
+#include <plugins/plugin.h>
+
+typedef struct private_plugin_loader_t private_plugin_loader_t;
+
+/**
+ * private data of plugin_loader
+ */
+struct private_plugin_loader_t {
+
+	/**
+	 * public functions
+	 */
+	plugin_loader_t public;
+	
+	/**
+	 * list of loaded plugins
+	 */
+	linked_list_t *plugins;
+};
+
+/**
+ * Implementation of plugin_loader_t.load_plugins.
+ */
+static int load(private_plugin_loader_t *this, char *path, char *prefix)
+{
+	enumerator_t *enumerator;
+	char *file, *ending, *rel;
+	void *handle;
+	int count = 0;
+	
+	enumerator = enumerator_create_directory(path);
+	if (!enumerator)
+	{
+		DBG1("opening plugin directory %s failed", path);
+		return 0;
+	}
+	DBG1("loading plugins from %s", path);
+	while (enumerator->enumerate(enumerator, &rel, &file, NULL))
+	{
+		plugin_t *plugin;
+		plugin_constructor_t constructor;
+		
+		ending = file + strlen(file) - 3;
+		if (ending <= file || !streq(ending, ".so"))
+		{	/* only process .so libraries */
+			continue;
+		}
+		if (!strneq(prefix, rel, strlen(prefix)))
+		{
+			continue;
+		}
+		handle = dlopen(file, RTLD_LAZY);
+		if (handle == NULL)
+		{
+			DBG1("loading plugin %s failed: %s", rel, dlerror());
+			continue;
+		}
+		constructor = dlsym(handle, "plugin_create");
+		if (constructor == NULL)
+		{
+			DBG1("plugin %s has no plugin_create() function, skipped", rel);
+			dlclose(handle);
+			continue;
+		}
+		plugin = constructor();
+		if (plugin == NULL)
+		{
+			DBG1("plugin %s constructor failed, skipping", rel);
+			dlclose(handle);
+			continue;
+		}
+		DBG1("plugin %s loaded successfully", rel);
+		/* insert in front to destroy them in reverse order */
+		this->plugins->insert_last(this->plugins, plugin);
+		/* we do not store or free dlopen() handles, leak_detective requires
+		 * the modules to keep loaded until leak report */
+		count++;
+	}
+	enumerator->destroy(enumerator);
+	return count;
+}
+
+/**
+ * Implementation of plugin_loader_t.destroy
+ */
+static void destroy(private_plugin_loader_t *this)
+{
+	this->plugins->destroy_offset(this->plugins, offsetof(plugin_t, destroy));
+	free(this);
+}
+
+/*
+ * see header file
+ */
+plugin_loader_t *plugin_loader_create()
+{
+	private_plugin_loader_t *this = malloc_thing(private_plugin_loader_t);
+	
+	this->public.load = (int(*)(plugin_loader_t*, char *path, char *prefix))load;
+	this->public.destroy = (void(*)(plugin_loader_t*))destroy;
+	
+	this->plugins = linked_list_create();
+	
+	return &this->public;
+}
+