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/*
* Copyright (C) 2010-2013 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.
*/
/**
* @defgroup tnccs_manager tnccs_manager
* @{ @ingroup tnccs
*/
#ifndef TNCCS_MANAGER_H_
#define TNCCS_MANAGER_H_
typedef struct tnccs_manager_t tnccs_manager_t;
#include "tnccs.h"
#include "tnc/imv/imv_recommendations.h"
/**
* The TNCCS manager manages all TNCCS implementations and creates instances.
*
* A plugin registers its implemented TNCCS protocol with the manager by
* providing type and a constructor function. The manager then creates
* TNCCS protocol instances via the provided constructor.
*/
struct tnccs_manager_t {
/**
* Register a TNCCS protocol implementation.
*
* @param type TNCCS protocol type
* @param constructor constructor, returns a TNCCS protocol implementation
*/
void (*add_method)(tnccs_manager_t *this, tnccs_type_t type,
tnccs_constructor_t constructor);
/**
* Unregister a TNCCS protocol implementation using it's constructor.
*
* @param constructor constructor function to remove, as added in add_method
*/
void (*remove_method)(tnccs_manager_t *this, tnccs_constructor_t constructor);
/**
* Create a new TNCCS protocol instance.
*
* @param type type of the TNCCS protocol
* @param is_server TRUE if TNC Server, FALSE if TNC Client
* @param server Server identity
* @param peer Client identity
* @param transport Underlying TNC IF-T transport protocol used
* @param cb Callback function if TNC Server, NULL if TNC Client
* @return TNCCS protocol instance, NULL if no constructor found
*/
tnccs_t* (*create_instance)(tnccs_manager_t *this, tnccs_type_t type,
bool is_server, identification_t *server,
identification_t *peer,
tnc_ift_type_t transport, tnccs_cb_t cb);
/**
* Create a TNCCS connection and assign a unique connection ID as well a
* callback function for adding a message to a TNCCS batch and create
* an empty set for collecting IMV recommendations
*
* @param type TNCCS protocol type
* @param tnccs TNCCS connection instance
* @param send_message TNCCS callback function
* @param request_handshake_retry pointer to boolean variable
* @param max_msg_len maximum PA-TNC message size
* @param recs pointer to IMV recommendation set
* @return assigned connection ID
*/
TNC_ConnectionID (*create_connection)(tnccs_manager_t *this,
tnccs_type_t type, tnccs_t *tnccs,
tnccs_send_message_t send_message,
bool *request_handshake_retry,
u_int32_t max_msg_len,
recommendations_t **recs);
/**
* Remove a TNCCS connection using its connection ID.
*
* @param id ID of the connection to be removed
* @param is_server TNC Server if TRUE, TNC Client if FALSE
*/
void (*remove_connection)(tnccs_manager_t *this, TNC_ConnectionID id,
bool is_server);
/**
* Request a handshake retry
*
* @param is_imc TRUE if IMC, FALSE if IMV
* @param imcv_id ID of IMC or IMV requesting the retry
* @param id ID of a specific connection or any connection
* @param reason reason for the handshake retry
* @return return code
*/
TNC_Result (*request_handshake_retry)(tnccs_manager_t *this, bool is_imc,
TNC_UInt32 imcv_id,
TNC_ConnectionID id,
TNC_RetryReason reason);
/**
* Add an IMC/IMV message to the batch of a given connection ID.
*
* @param imc_id ID of IMC or TNC_IMCID_ANY
* @param imv_id ID of IMV or TNC_IMVID_ANY
* @param id ID of target connection
* @param msg_flags message flags
* @param msg message to be added
* @param msg_len message length
* @param msg_vid message vendor ID
* @param msg_subtype message subtype
* @return return code
*/
TNC_Result (*send_message)(tnccs_manager_t *this,
TNC_IMCID imc_id,
TNC_IMVID imv_id,
TNC_ConnectionID id,
TNC_UInt32 msg_flags,
TNC_BufferReference msg,
TNC_UInt32 msg_len,
TNC_VendorID msg_vid,
TNC_MessageSubtype msg_subtype);
/**
* Deliver an IMV Action Recommendation and IMV Evaluation Result to the TNCS
*
* @param imv_id ID of the IMV providing the recommendation
* @param id ID of target connection
* @param rec action recommendation
* @param eval evaluation result
* @return return code
*/
TNC_Result (*provide_recommendation)(tnccs_manager_t *this,
TNC_IMVID imv_id,
TNC_ConnectionID id,
TNC_IMV_Action_Recommendation rec,
TNC_IMV_Evaluation_Result eval);
/**
* Get the value of an attribute associated with a connection or with the
* TNCS as a whole.
*
* @param is_imc TRUE if IMC, FALSE if IMV
* @param imcv_id ID of the IMC/IMV requesting the attribute
* @param id ID of target connection
* @param attribute_id ID of the requested attribute
* @param buffer_len length of the buffer in bytes
* @param buffer pointer to the buffer
* @param value_len actual length of the returned attribute
* @return return code
*/
TNC_Result (*get_attribute)(tnccs_manager_t *this, bool is_imc,
TNC_UInt32 imcv_id,
TNC_ConnectionID id,
TNC_AttributeID attribute_id,
TNC_UInt32 buffer_len,
TNC_BufferReference buffer,
TNC_UInt32 *value_len);
/**
* Set the value of an attribute associated with a connection or with the
* TNCS as a whole.
*
* @param is_imc TRUE if IMC, FALSE if IMV
* @param imcv_id ID of the IMC/IMV setting the attribute
* @param id ID of target connection
* @param attribute_id ID of the attribute to be set
* @param buffer_len length of the buffer in bytes
* @param buffer pointer to the buffer
* @return return code
*/
TNC_Result (*set_attribute)(tnccs_manager_t *this, bool is_imc,
TNC_UInt32 imcv_id,
TNC_ConnectionID id,
TNC_AttributeID attribute_id,
TNC_UInt32 buffer_len,
TNC_BufferReference buffer);
/**
* Destroy a tnccs_manager instance.
*/
void (*destroy)(tnccs_manager_t *this);
};
/**
* Helper function to (un-)register TNCCS methods from plugin features.
*
* This function is a plugin_feature_callback_t and can be used with the
* PLUGIN_CALLBACK macro to register a TNCCS method constructor.
*
* @param plugin plugin registering the TNCCS method constructor
* @param feature associated plugin feature
* @param reg TRUE to register, FALSE to unregister.
* @param data data passed to callback, a tnccs_constructor_t
*/
bool tnccs_method_register(plugin_t *plugin, plugin_feature_t *feature,
bool reg, void *data);
#endif /** TNCCS_MANAGER_H_ @}*/
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