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/*
* Copyright (C) 2015 Tobias Brunner
* 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 redirect_manager redirect_manager
* @{ @ingroup sa
*/
#ifndef REDIRECT_MANAGER_H_
#define REDIRECT_MANAGER_H_
typedef struct redirect_manager_t redirect_manager_t;
#include <sa/redirect_provider.h>
/**
* Manages redirect providers.
*/
struct redirect_manager_t {
/**
* Add a redirect provider.
*
* All registered providers are queried until one of them decides to
* redirect a client.
*
* A provider may be called concurrently for different IKE_SAs.
*
* @param provider provider to register
*/
void (*add_provider)(redirect_manager_t *this,
redirect_provider_t *provider);
/**
* Remove a redirect provider.
*
* @param provider provider to unregister
*/
void (*remove_provider)(redirect_manager_t *this,
redirect_provider_t *provider);
/**
* Determine whether a client should be redirected upon receipt of the
* IKE_SA_INIT message.
*
* @param ike_sa IKE_SA for which this is called
* @param gateway[out] new IKE gateway (IP or FQDN)
* @return TRUE if client should be redirected, FALSE otherwise
*/
bool (*redirect_on_init)(redirect_manager_t *this, ike_sa_t *ike_sa,
identification_t **gateway);
/**
* Determine whether a client should be redirected after the IKE_AUTH has
* been handled. Should be called after the client is authenticated and
* when the server authenticates itself.
*
* @param ike_sa IKE_SA for which this is called
* @param gateway[out] new IKE gateway (IP or FQDN)
* @return TRUE if client should be redirected, FALSE otherwise
*/
bool (*redirect_on_auth)(redirect_manager_t *this, ike_sa_t *ike_sa,
identification_t **gateway);
/**
* Destroy this instance.
*/
void (*destroy)(redirect_manager_t *this);
};
/**
* Create a redirect manager instance.
*
* @return manager instance
*/
redirect_manager_t *redirect_manager_create();
/**
* Create notification data of a REDIRECT or REDIRECT_FROM payload using the
* given gateway identity and optional nonce (only used during IKE_SA_INIT).
*
* @param gw gateway identity (IP or FQDN), gets cloned
* @param nonce nonce value, or chunk_empty, gets cloned
* @return notify data, chunk_empty if ID type is not supported
*/
chunk_t redirect_data_create(identification_t *gw, chunk_t nonce);
/**
* Parse notification data of a REDIRECT or REDIRECTED_FROM notify payload.
*
* @param data notification data to parse
* @param[out] nonce nonce data (allocated), if any was provided
* @return gateway identity, NULL if data is invalid
*/
identification_t *redirect_data_parse(chunk_t data, chunk_t *nonce);
#endif /** REDIRECT_MANAGER_H_ @}*/
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