[svn-upgrade] Integrating new upstream version, strongswan (4.2.4)

1 files changed, 193 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..4c5095e4a
--- /dev/null
+++ b/src/libstrongswan/plugins/plugin_loader.c
@@ -0,0 +1,193 @@
+/*
+ * 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: plugin_loader.c 4108 2008-06-25 14:53:49Z martin $
+ */
+
+#define _GNU_SOURCE
+#include "plugin_loader.h"
+
+#include <string.h>
+#include <dlfcn.h>
+#include <limits.h>
+#include <stdio.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;
+	
+	/**
+	 * names of loaded plugins
+	 */
+	linked_list_t *names;
+};
+
+/**
+ * load a single plugin
+ */
+static plugin_t* load_plugin(private_plugin_loader_t *this,
+							 char *path, char *name)
+{
+	char file[PATH_MAX];
+	void *handle;
+	plugin_t *plugin;
+	plugin_constructor_t constructor;
+	
+	snprintf(file, sizeof(file), "%s/libstrongswan-%s.so", path, name);
+	
+	handle = dlopen(file, RTLD_LAZY);
+	if (handle == NULL)
+	{
+		DBG1("loading plugin '%s' failed: %s", name, dlerror());
+		return NULL;
+	}
+	constructor = dlsym(handle, "plugin_create");
+	if (constructor == NULL)
+	{
+		DBG1("loading plugin '%s' failed: no plugin_create() function", name);
+		dlclose(handle);
+		return NULL;
+	}
+	plugin = constructor();
+	if (plugin == NULL)
+	{
+		DBG1("loading plugin '%s' failed: plugin_create() returned NULL", name);
+		dlclose(handle);
+		return NULL;
+	}
+	DBG2("plugin '%s' loaded successfully", name);
+	
+	/* we do not store or free dlopen() handles, leak_detective requires
+	 * the modules to keep loaded until leak report */
+	return plugin;
+}
+
+/**
+ * Implementation of plugin_loader_t.load_plugins.
+ */
+static int load(private_plugin_loader_t *this, char *path, char *list)
+{
+	plugin_t *plugin;
+	char *pos;
+	int count = 0;
+	
+	list = strdupa(list);
+	while (TRUE)
+	{
+		/* eat any whitespace in front */
+		while (*list == ' ')
+		{
+			list++;
+		}
+		/* have we reached the end of the list? */
+		if (!*list)
+		{
+			break;
+		}
+		pos = strchr(list, ' ');
+		if (pos)
+		{
+			*pos++ = '\0';
+		}
+		plugin = load_plugin(this, path, list);
+		if (plugin)
+		{	/* insert in front to destroy them in reverse order */
+			this->plugins->insert_last(this->plugins, plugin);
+			this->names->insert_last(this->names, strdup(list));
+			count++;
+		}
+		if (pos)
+		{
+			list = pos;
+		}
+		else
+		{
+			break;
+		}
+	}
+	return count;
+}
+
+/**
+ * Implementation of plugin_loader_t.unload
+ */
+static void unload(private_plugin_loader_t *this)
+{
+	plugin_t *plugin;
+	char *name;
+	
+	while (this->plugins->remove_first(this->plugins,
+									   (void**)&plugin) == SUCCESS)
+	{
+		plugin->destroy(plugin);
+	}
+	while (this->names->remove_first(this->names, (void**)&name) == SUCCESS)
+	{
+		free(name);
+	}
+}
+
+/**
+ * Implementation of plugin_loader_t.create_plugin_enumerator
+ */
+static enumerator_t* create_plugin_enumerator(private_plugin_loader_t *this)
+{
+	return this->names->create_enumerator(this->names);
+}	 
+
+/**
+ * Implementation of plugin_loader_t.destroy
+ */
+static void destroy(private_plugin_loader_t *this)
+{
+	this->plugins->destroy_offset(this->plugins, offsetof(plugin_t, destroy));
+	this->names->destroy_function(this->names, free);
+	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.unload = (void(*)(plugin_loader_t*))unload;
+	this->public.create_plugin_enumerator = (enumerator_t*(*)(plugin_loader_t*))create_plugin_enumerator;
+	this->public.destroy = (void(*)(plugin_loader_t*))destroy;
+	
+	this->plugins = linked_list_create();
+	this->names = linked_list_create();
+	
+	return &this->public;
+}
+