1 files changed, 477 insertions, 0 deletions

diff --git a/src/libcharon/tnc/tnccs/tnccs_manager.c b/src/libcharon/tnc/tnccs/tnccs_manager.c
new file mode 100644
index 000000000..7e522b870
--- /dev/null
+++ b/src/libcharon/tnc/tnccs/tnccs_manager.c
@@ -0,0 +1,477 @@
+/*
+ * Copyright (C) 2010 Andreas Steffen
+ * HSR 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 "tnccs_manager.h"
+
+#include <tnc/imv/imv_recommendations.h>
+
+#include <debug.h>
+#include <daemon.h>
+#include <utils/linked_list.h>
+#include <threading/rwlock.h>
+
+typedef struct private_tnccs_manager_t private_tnccs_manager_t;
+typedef struct tnccs_entry_t tnccs_entry_t;
+typedef struct tnccs_connection_entry_t tnccs_connection_entry_t;
+
+/**
+ * TNCCS constructor entry
+ */
+struct tnccs_entry_t {
+
+	/**
+	 * TNCCS protocol type
+	 */
+	tnccs_type_t type;
+
+	/**
+	 * constructor function to create instance
+	 */
+	tnccs_constructor_t constructor;
+};
+
+/**
+ * TNCCS connection entry
+ */
+struct tnccs_connection_entry_t {
+
+	/**
+	 * TNCCS connection ID
+	 */
+	TNC_ConnectionID id;
+
+	/**
+	 * TNCCS instance
+	 */
+	tnccs_t *tnccs;
+
+	/**
+	 * TNCCS send message function
+	 */
+	tnccs_send_message_t send_message;
+
+	/**
+	 * TNCCS request handshake retry flag
+	 */
+	bool *request_handshake_retry;
+
+	/**
+	 * collection of IMV recommendations
+	 */
+	recommendations_t *recs;
+};
+
+/**
+ * private data of tnccs_manager
+ */
+struct private_tnccs_manager_t {
+
+	/**
+	 * public functions
+	 */
+	tnccs_manager_t public;
+
+	/**
+	 * list of TNCCS protocol entries
+	 */
+	linked_list_t *protocols;
+
+	/**
+	 * rwlock to lock the TNCCS protocol entries
+	 */
+	rwlock_t *protocol_lock;
+
+	/**
+	 * connection ID counter
+	 */
+	TNC_ConnectionID connection_id;
+
+	/**
+	 * list of TNCCS connection entries
+	 */
+	linked_list_t *connections;
+
+	/**
+	 * rwlock to lock TNCCS connection entries
+	 */
+	rwlock_t *connection_lock;
+
+};
+
+METHOD(tnccs_manager_t, add_method, void,
+	private_tnccs_manager_t *this, tnccs_type_t type,
+	tnccs_constructor_t constructor)
+{
+	tnccs_entry_t *entry;
+
+	entry = malloc_thing(tnccs_entry_t);
+	entry->type = type;
+	entry->constructor = constructor;
+
+	this->protocol_lock->write_lock(this->protocol_lock);
+	this->protocols->insert_last(this->protocols, entry);
+	this->protocol_lock->unlock(this->protocol_lock);
+}
+
+METHOD(tnccs_manager_t, remove_method, void,
+	private_tnccs_manager_t *this, tnccs_constructor_t constructor)
+{
+	enumerator_t *enumerator;
+	tnccs_entry_t *entry;
+
+	this->protocol_lock->write_lock(this->protocol_lock);
+	enumerator = this->protocols->create_enumerator(this->protocols);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (constructor == entry->constructor)
+		{
+			this->protocols->remove_at(this->protocols, enumerator);
+			free(entry);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->protocol_lock->unlock(this->protocol_lock);
+}
+
+METHOD(tnccs_manager_t, create_instance, tnccs_t*,
+	private_tnccs_manager_t *this, tnccs_type_t type, bool is_server)
+{
+	enumerator_t *enumerator;
+	tnccs_entry_t *entry;
+	tnccs_t *protocol = NULL;
+
+	this->protocol_lock->read_lock(this->protocol_lock);
+	enumerator = this->protocols->create_enumerator(this->protocols);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (type == entry->type)
+		{
+			protocol = entry->constructor(is_server);
+			if (protocol)
+			{
+				break;
+			}
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->protocol_lock->unlock(this->protocol_lock);
+
+	return protocol;
+}
+
+METHOD(tnccs_manager_t, create_connection, TNC_ConnectionID,
+	private_tnccs_manager_t *this, tnccs_t *tnccs, 
+	tnccs_send_message_t send_message, bool* request_handshake_retry,
+	recommendations_t **recs)
+{
+	tnccs_connection_entry_t *entry;
+
+	entry = malloc_thing(tnccs_connection_entry_t);
+	entry->tnccs = tnccs;
+	entry->send_message = send_message;
+	entry->request_handshake_retry = request_handshake_retry;
+	if (recs)
+	{
+		/* we assume a TNC Server needing recommendations from IMVs */
+		if (!charon->imvs)
+		{
+ 			DBG1(DBG_TNC, "no IMV manager available!");
+			free(entry);
+			return 0;
+		}
+		entry->recs = charon->imvs->create_recommendations(charon->imvs);
+		*recs = entry->recs;
+	}
+	else
+	{
+		/* we assume a TNC Client */
+		if (!charon->imcs)
+		{
+			DBG1(DBG_TNC, "no IMC manager available!");
+			free(entry);
+			return 0;
+		}
+		entry->recs = NULL;
+	}
+	this->connection_lock->write_lock(this->connection_lock);
+	entry->id = ++this->connection_id;
+	this->connections->insert_last(this->connections, entry);
+	this->connection_lock->unlock(this->connection_lock);
+
+	DBG1(DBG_TNC, "assigned TNCCS Connection ID %u", entry->id);
+	return entry->id;
+}
+
+METHOD(tnccs_manager_t, remove_connection, void,
+	private_tnccs_manager_t *this, TNC_ConnectionID id)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+
+	this->connection_lock->write_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == entry->id)
+		{
+			this->connections->remove_at(this->connections, enumerator);
+			if (entry->recs)
+			{
+				entry->recs->destroy(entry->recs);
+			}
+			free(entry);
+			DBG1(DBG_TNC, "removed TNCCS Connection ID %u", id);
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+}
+
+METHOD(tnccs_manager_t,	request_handshake_retry, TNC_Result,
+	private_tnccs_manager_t *this, bool is_imc, TNC_UInt32 imcv_id,
+												TNC_ConnectionID id,
+												TNC_RetryReason reason)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+
+	if (id == TNC_CONNECTIONID_ANY)
+	{
+		DBG2(DBG_TNC, "%s %u requests handshake retry for all connections "
+					  "(reason: %u)", is_imc ? "IMC":"IMV", reason);
+	}
+	else
+	{
+		DBG2(DBG_TNC, "%s %u requests handshake retry for connection ID %u "
+					  "(reason: %u)", is_imc ? "IMC":"IMV", id, reason);
+	}
+	this->connection_lock->read_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == TNC_CONNECTIONID_ANY || id == entry->id)
+		{
+			*entry->request_handshake_retry = TRUE;
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+
+	return TNC_RESULT_SUCCESS;
+}
+
+METHOD(tnccs_manager_t, send_message, TNC_Result,
+	private_tnccs_manager_t *this, TNC_IMCID imc_id, TNC_IMVID imv_id,
+								   TNC_ConnectionID id,
+								   TNC_BufferReference msg,
+								   TNC_UInt32 msg_len,
+								   TNC_MessageType msg_type)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+	tnccs_send_message_t send_message = NULL;
+	tnccs_t *tnccs = NULL;
+
+	this->connection_lock->read_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == entry->id)
+		{
+			tnccs = entry->tnccs;
+			send_message = entry->send_message;
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+
+	if (tnccs && send_message)
+	{
+		send_message(tnccs, imc_id, imv_id, msg, msg_len, msg_type);
+		return TNC_RESULT_SUCCESS;
+	 }
+	return TNC_RESULT_FATAL;
+}
+
+METHOD(tnccs_manager_t, provide_recommendation, TNC_Result,
+	private_tnccs_manager_t *this, TNC_IMVID imv_id,
+								   TNC_ConnectionID id,
+								   TNC_IMV_Action_Recommendation rec,
+								   TNC_IMV_Evaluation_Result eval)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+	recommendations_t *recs = NULL;
+
+	this->connection_lock->read_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == entry->id)
+		{
+			recs = entry->recs;
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+
+	if (recs)
+	{
+		recs->provide_recommendation(recs, imv_id, rec, eval);
+		return TNC_RESULT_SUCCESS;
+	 }
+	return TNC_RESULT_FATAL;
+}
+
+METHOD(tnccs_manager_t, get_attribute, TNC_Result,
+	private_tnccs_manager_t *this, TNC_IMVID imv_id,
+								   TNC_ConnectionID id,
+								   TNC_AttributeID attribute_id,
+								   TNC_UInt32 buffer_len,
+								   TNC_BufferReference buffer,
+								   TNC_UInt32 *out_value_len)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+	recommendations_t *recs = NULL;
+
+	if (id == TNC_CONNECTIONID_ANY ||
+		attribute_id != TNC_ATTRIBUTEID_PREFERRED_LANGUAGE)
+	{
+		return TNC_RESULT_INVALID_PARAMETER;
+	}
+
+	this->connection_lock->read_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == entry->id)
+		{
+			recs = entry->recs;
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+
+	if (recs)
+	{
+		chunk_t pref_lang;
+
+		pref_lang = recs->get_preferred_language(recs);
+		if (pref_lang.len == 0)
+		{
+			return TNC_RESULT_INVALID_PARAMETER;
+		}
+		*out_value_len = pref_lang.len;
+		if (buffer && buffer_len <= pref_lang.len)
+		{
+			memcpy(buffer, pref_lang.ptr, pref_lang.len);
+		}
+		return TNC_RESULT_SUCCESS;
+	 }
+	return TNC_RESULT_INVALID_PARAMETER;
+}
+
+METHOD(tnccs_manager_t, set_attribute, TNC_Result,
+	private_tnccs_manager_t *this, TNC_IMVID imv_id,
+								   TNC_ConnectionID id,
+								   TNC_AttributeID attribute_id,
+								   TNC_UInt32 buffer_len,
+								   TNC_BufferReference buffer)
+{
+	enumerator_t *enumerator;
+	tnccs_connection_entry_t *entry;
+	recommendations_t *recs = NULL;
+
+	if (id == TNC_CONNECTIONID_ANY ||
+		(attribute_id != TNC_ATTRIBUTEID_REASON_STRING &&
+		 attribute_id != TNC_ATTRIBUTEID_REASON_LANGUAGE))
+	{
+		return TNC_RESULT_INVALID_PARAMETER;
+	}
+
+	this->connection_lock->read_lock(this->connection_lock);
+	enumerator = this->connections->create_enumerator(this->connections);
+	while (enumerator->enumerate(enumerator, &entry))
+	{
+		if (id == entry->id)
+		{
+			recs = entry->recs;
+			break;
+		}
+	}
+	enumerator->destroy(enumerator);
+	this->connection_lock->unlock(this->connection_lock);
+
+	if (recs)
+	{
+		chunk_t attribute = { buffer, buffer_len };
+
+		if (attribute_id == TNC_ATTRIBUTEID_REASON_STRING)
+		{
+			return recs->set_reason_string(recs, imv_id, attribute);
+		}
+		else
+		{
+			return recs->set_reason_language(recs, imv_id, attribute);
+		}
+	}
+	return TNC_RESULT_INVALID_PARAMETER;
+}
+
+METHOD(tnccs_manager_t, destroy, void,
+	private_tnccs_manager_t *this)
+{
+	this->protocols->destroy_function(this->protocols, free);
+	this->protocol_lock->destroy(this->protocol_lock);
+	this->connections->destroy_function(this->connections, free);
+	this->connection_lock->destroy(this->connection_lock);
+	free(this);
+}
+
+/*
+ * See header
+ */
+tnccs_manager_t *tnccs_manager_create()
+{
+	private_tnccs_manager_t *this;
+
+	INIT(this,
+			.public = {
+				.add_method = _add_method,
+				.remove_method = _remove_method,
+				.create_instance = _create_instance,
+				.create_connection = _create_connection,
+				.remove_connection = _remove_connection,
+				.request_handshake_retry = _request_handshake_retry,
+				.send_message = _send_message,
+				.provide_recommendation = _provide_recommendation,
+				.get_attribute = _get_attribute,
+				.set_attribute = _set_attribute,
+				.destroy = _destroy,
+			},
+			.protocols = linked_list_create(),
+			.connections = linked_list_create(),
+			.protocol_lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+			.connection_lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
+	);
+
+	return &this->public;
+}
+