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/*
This file is part of GNUnet.
Copyright (C) 2013, 2014 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet 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
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian M. Fuchs
* @author Gaurav Kukreja
*
* @file
* API to the scalarproduct service
*
* @defgroup scalarproduct Scalar Product service
*
* @{
*/
#ifndef GNUNET_SCALARPRODUCT_SERVICE_H
#define GNUNET_SCALARPRODUCT_SERVICE_H
#define GCRYPT_NO_DEPRECATED
#include <gcrypt.h>
#ifdef __cplusplus
extern "C" {
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
/**
* Version of the scalarproduct API.
*/
#define GNUNET_SCALARPRODUCT_VERSION 0x00000044
/**
* Result status values for the computation.
*/
enum GNUNET_SCALARPRODUCT_ResponseStatus
{
/**
* Operation is still active (never returned, used internally).
*/
GNUNET_SCALARPRODUCT_STATUS_INIT = 0,
/**
* Operation is still active (never returned, used internally).
*/
GNUNET_SCALARPRODUCT_STATUS_ACTIVE = 1,
/**
* The computation was successful.
*/
GNUNET_SCALARPRODUCT_STATUS_SUCCESS,
/**
* We encountered some error.
*/
GNUNET_SCALARPRODUCT_STATUS_FAILURE,
/**
* We got an invalid response.
*/
GNUNET_SCALARPRODUCT_STATUS_INVALID_RESPONSE,
/**
* We got disconnected from the SCALARPRODUCT service.
*/
GNUNET_SCALARPRODUCT_STATUS_DISCONNECTED
};
/**
* Opaque declaration of the SP-Handle
*/
struct GNUNET_SCALARPRODUCT_Handle;
GNUNET_NETWORK_STRUCT_BEGIN
/**
* An element key-value pair for scalarproduct
*/
struct GNUNET_SCALARPRODUCT_Element
{
/**
* Key used to identify matching pairs of values to multiply.
*/
struct GNUNET_HashCode key;
/**
* Value to multiply in scalar product, in NBO.
*/
int64_t value GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END
/**
* Continuation called to notify client about result of the
* operation.
*
* @param cls closure
* @param status Status of the request
*/
typedef void
(*GNUNET_SCALARPRODUCT_ContinuationWithStatus) (void *cls,
enum GNUNET_SCALARPRODUCT_ResponseStatus status);
/**
* Process a datum that was stored in the scalarproduct.
*
* @param cls closure
* @param status Status of the request
* @param result result of the computation
*/
typedef void
(*GNUNET_SCALARPRODUCT_DatumProcessor) (void *cls,
enum GNUNET_SCALARPRODUCT_ResponseStatus status,
gcry_mpi_t result);
/**
* Entry in the request queue per client
*/
struct GNUNET_SCALARPRODUCT_ComputationHandle;
/**
* Request by Alice's client for computing a scalar product
*
* @param cfg the gnunet configuration handle
* @param session_key Session key should be unique to the requesting client
* @param peer PeerID of the other peer
* @param elements Array of elements of the vector
* @param element_count Number of elements in the @a elements vector
* @param cont Callback function
* @param cont_cls Closure for the @a cont callback function
* @return a new handle for this computation
*/
struct GNUNET_SCALARPRODUCT_ComputationHandle *
GNUNET_SCALARPRODUCT_start_computation (const struct GNUNET_CONFIGURATION_Handle *cfg,
const struct GNUNET_HashCode *session_key,
const struct GNUNET_PeerIdentity *peer,
const struct GNUNET_SCALARPRODUCT_Element *elements,
uint32_t element_count,
GNUNET_SCALARPRODUCT_DatumProcessor cont,
void *cont_cls);
/**
* Used by Bob's client to cooperate with Alice,
*
* @param cfg the gnunet configuration handle
* @param session_key Session key unique to the requesting client
* @param elements Array of elements of the vector
* @param element_count Number of elements in the @a elements vector
* @param cont Callback function
* @param cont_cls Closure for the @a cont callback function
* @return a new handle for this computation
*/
struct GNUNET_SCALARPRODUCT_ComputationHandle *
GNUNET_SCALARPRODUCT_accept_computation (const struct GNUNET_CONFIGURATION_Handle *cfg,
const struct GNUNET_HashCode *key,
const struct GNUNET_SCALARPRODUCT_Element *elements,
uint32_t element_count,
GNUNET_SCALARPRODUCT_ContinuationWithStatus cont,
void *cont_cls);
/**
* Cancel an ongoing computation or revoke our collaboration offer.
* Closes the connection to the service
*
* @param h computation handle to terminate
*/
void
GNUNET_SCALARPRODUCT_cancel (struct GNUNET_SCALARPRODUCT_ComputationHandle *h);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
#endif
/** @} */ /* end of group */
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