Imported Upstream version 5.1.0

1 files changed, 235 insertions, 0 deletions

diff --git a/src/libstrongswan/networking/streams/stream_manager.c b/src/libstrongswan/networking/streams/stream_manager.c
new file mode 100644
index 000000000..2cbd6127e
--- /dev/null
+++ b/src/libstrongswan/networking/streams/stream_manager.c
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * 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 "stream_manager.h"
+
+#include <threading/rwlock.h>
+
+typedef struct private_stream_manager_t private_stream_manager_t;
+
+/**
+ * Private data of an stream_manager_t object.
+ */
+struct private_stream_manager_t {
+
+	/**
+	 * Public stream_manager_t interface.
+	 */
+	stream_manager_t public;
+
+	/**
+	 * List of registered stream constructors, as stream_entry_t
+	 */
+	linked_list_t *streams;
+
+	/**
+	 * List of registered service constructors, as service_entry_t
+	 */
+	linked_list_t *services;
+
+	/**
+	 * Lock for all lists
+	 */
+	rwlock_t *lock;
+};
+
+/**
+ * Registered stream backend
+ */
+typedef struct {
+	/** URI prefix */
+	char *prefix;
+	/** constructor function */
+	stream_constructor_t create;
+} stream_entry_t;
+
+/**
+ * Registered service backend
+ */
+typedef struct {
+	/** URI prefix */
+	char *prefix;
+	/** constructor function */
+	stream_service_constructor_t create;
+} service_entry_t;
+
+METHOD(stream_manager_t, connect_, stream_t*,
+	private_stream_manager_t *this, char *uri)
+{
+	enumerator_t *enumerator;
+	stream_entry_t *entry;
+	stream_t *stream = NULL;
+
+	this->lock->read_lock(this->lock);
+	enumerator = this->streams->create_enumerator(this->streams);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (strpfx(uri, entry->prefix))
+		{
+			stream = entry->create(uri);
+			if (stream)
+			{
+				break;
+			}
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+
+	return stream;
+}
+
+METHOD(stream_manager_t, create_service, stream_service_t*,
+	private_stream_manager_t *this, char *uri, int backlog)
+{
+	enumerator_t *enumerator;
+	service_entry_t *entry;
+	stream_service_t *service = NULL;
+
+	this->lock->read_lock(this->lock);
+	enumerator = this->services->create_enumerator(this->services);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (strpfx(uri, entry->prefix))
+		{
+			service = entry->create(uri, backlog);
+			if (service)
+			{
+				break;
+			}
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+
+	return service;
+}
+
+METHOD(stream_manager_t, add_stream, void,
+	private_stream_manager_t *this, char *prefix, stream_constructor_t create)
+{
+	stream_entry_t *entry;
+
+	INIT(entry,
+		.prefix = strdup(prefix),
+		.create = create,
+	);
+
+	this->lock->write_lock(this->lock);
+	this->streams->insert_last(this->streams, entry);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(stream_manager_t, remove_stream, void,
+	private_stream_manager_t *this, stream_constructor_t create)
+{
+	enumerator_t *enumerator;
+	stream_entry_t *entry;
+
+	this->lock->write_lock(this->lock);
+	enumerator = this->streams->create_enumerator(this->streams);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (entry->create == create)
+		{
+			this->streams->remove_at(this->streams, enumerator);
+			free(entry->prefix);
+			free(entry);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(stream_manager_t, add_service, void,
+	private_stream_manager_t *this, char *prefix,
+	stream_service_constructor_t create)
+{
+	service_entry_t *entry;
+
+	INIT(entry,
+		.prefix = strdup(prefix),
+		.create = create,
+	);
+
+	this->lock->write_lock(this->lock);
+	this->services->insert_last(this->services, entry);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(stream_manager_t, remove_service, void,
+	private_stream_manager_t *this, stream_service_constructor_t create)
+{
+	enumerator_t *enumerator;
+	service_entry_t *entry;
+
+	this->lock->write_lock(this->lock);
+	enumerator = this->services->create_enumerator(this->services);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (entry->create == create)
+		{
+			this->services->remove_at(this->services, enumerator);
+			free(entry->prefix);
+			free(entry);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->lock->unlock(this->lock);
+}
+
+METHOD(stream_manager_t, destroy, void,
+	private_stream_manager_t *this)
+{
+	remove_stream(this, stream_create_unix);
+	remove_stream(this, stream_create_tcp);
+	remove_service(this, stream_service_create_unix);
+	remove_service(this, stream_service_create_tcp);
+
+	this->streams->destroy(this->streams);
+	this->services->destroy(this->services);
+	this->lock->destroy(this->lock);
+	free(this);
+}
+
+/**
+ * See header
+ */
+stream_manager_t *stream_manager_create()
+{
+	private_stream_manager_t *this;
+
+	INIT(this,
+		.public = {
+			.connect = _connect_,
+			.create_service = _create_service,
+			.add_stream = _add_stream,
+			.remove_stream = _remove_stream,
+			.add_service = _add_service,
+			.remove_service = _remove_service,
+			.destroy = _destroy,
+		},
+		.streams = linked_list_create(),
+		.services = linked_list_create(),
+		.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+	);
+
+	add_stream(this, "unix://", stream_create_unix);
+	add_stream(this, "tcp://", stream_create_tcp);
+	add_service(this, "unix://", stream_service_create_unix);
+	add_service(this, "tcp://", stream_service_create_tcp);
+
+	return &this->public;
+}