Imported Upstream version 5.0.1

1 files changed, 201 insertions, 0 deletions

diff --git a/src/libcharon/sa/eap/eap_manager.c b/src/libcharon/sa/eap/eap_manager.c
new file mode 100644
index 000000000..520c0ce56
--- /dev/null
+++ b/src/libcharon/sa/eap/eap_manager.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2008 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.
+ */
+
+#include "eap_manager.h"
+
+#include <utils/linked_list.h>
+#include <threading/rwlock.h>
+
+typedef struct private_eap_manager_t private_eap_manager_t;
+typedef struct eap_entry_t eap_entry_t;
+
+/**
+ * EAP constructor entry
+ */
+struct eap_entry_t {
+
+	/**
+	 * EAP method type, vendor specific if vendor is set
+	 */
+	eap_type_t type;
+
+	/**
+	 * vendor ID, 0 for default EAP methods
+	 */
+	u_int32_t vendor;
+
+	/**
+	 * Role of the method returned by the constructor, EAP_SERVER or EAP_PEER
+	 */
+	eap_role_t role;
+
+	/**
+	 * constructor function to create instance
+	 */
+	eap_constructor_t constructor;
+};
+
+/**
+ * private data of eap_manager
+ */
+struct private_eap_manager_t {
+
+	/**
+	 * public functions
+	 */
+	eap_manager_t public;
+
+	/**
+	 * list of eap_entry_t's
+	 */
+	linked_list_t *methods;
+
+	/**
+	 * rwlock to lock methods
+	 */
+	rwlock_t *lock;
+};
+
+METHOD(eap_manager_t, add_method, void,
+	private_eap_manager_t *this, eap_type_t type, u_int32_t vendor,
+	eap_role_t role, eap_constructor_t constructor)
+{
+	eap_entry_t *entry = malloc_thing(eap_entry_t);
+
+	entry->type = type;
+	entry->vendor = vendor;
+	entry->role = role;
+	entry->constructor = constructor;
+
+	this->lock->write_lock(this->lock);
+	this->methods->insert_last(this->methods, entry);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(eap_manager_t, remove_method, void,
+	private_eap_manager_t *this, eap_constructor_t constructor)
+{
+	enumerator_t *enumerator;
+	eap_entry_t *entry;
+
+	this->lock->write_lock(this->lock);
+	enumerator = this->methods->create_enumerator(this->methods);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (constructor == entry->constructor)
+		{
+			this->methods->remove_at(this->methods, enumerator);
+			free(entry);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+}
+
+/**
+ * filter the registered methods
+ */
+static bool filter_methods(uintptr_t role, eap_entry_t **entry,
+						   eap_type_t *type, void *in, u_int32_t *vendor)
+{
+	if ((*entry)->role != (eap_role_t)role)
+	{
+		return FALSE;
+	}
+	if ((*entry)->vendor == 0 &&
+	   ((*entry)->type < 4 || (*entry)->type == EAP_EXPANDED ||
+	    (*entry)->type > EAP_EXPERIMENTAL))
+	{	/* filter invalid types */
+		return FALSE;
+	}
+	if (type)
+	{
+		*type = (*entry)->type;
+	}
+	if (vendor)
+	{
+		*vendor = (*entry)->vendor;
+	}
+	return TRUE;
+}
+
+METHOD(eap_manager_t, create_enumerator, enumerator_t*,
+	private_eap_manager_t *this, eap_role_t role)
+{
+	this->lock->read_lock(this->lock);
+	return enumerator_create_cleaner(
+				enumerator_create_filter(
+					this->methods->create_enumerator(this->methods),
+					(void*)filter_methods, (void*)(uintptr_t)role, NULL),
+				(void*)this->lock->unlock, this->lock);
+}
+
+METHOD(eap_manager_t, create_instance, eap_method_t*,
+	private_eap_manager_t *this, eap_type_t type, u_int32_t vendor,
+	eap_role_t role, identification_t *server, identification_t *peer)
+{
+	enumerator_t *enumerator;
+	eap_entry_t *entry;
+	eap_method_t *method = NULL;
+
+	this->lock->read_lock(this->lock);
+	enumerator = this->methods->create_enumerator(this->methods);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (type == entry->type && vendor == entry->vendor &&
+			role == entry->role)
+		{
+			method = entry->constructor(server, peer);
+			if (method)
+			{
+				break;
+			}
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+	return method;
+}
+
+METHOD(eap_manager_t, destroy, void,
+	private_eap_manager_t *this)
+{
+	this->methods->destroy_function(this->methods, free);
+	this->lock->destroy(this->lock);
+	free(this);
+}
+
+/*
+ * See header
+ */
+eap_manager_t *eap_manager_create()
+{
+	private_eap_manager_t *this;
+
+	INIT(this,
+			.public = {
+				.add_method = _add_method,
+				.remove_method = _remove_method,
+				.create_enumerator = _create_enumerator,
+				.create_instance = _create_instance,
+				.destroy = _destroy,
+			},
+			.methods = linked_list_create(),
+			.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+	);
+
+	return &this->public;
+}