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22 * @author Christian M. Fuchs
23 * @author Gaurav Kukreja
26 * API to the scalarproduct service
28 * @defgroup scalarproduct Scalar Product service
32 #ifndef GNUNET_SCALARPRODUCT_SERVICE_H
33 #define GNUNET_SCALARPRODUCT_SERVICE_H
34 #define GCRYPT_NO_DEPRECATED
39 #if 0 /* keep Emacsens' auto-indent happy */
45 * Version of the scalarproduct API.
47 #define GNUNET_SCALARPRODUCT_VERSION 0x00000044
50 * Result status values for the computation.
52 enum GNUNET_SCALARPRODUCT_ResponseStatus
56 * Operation is still active (never returned, used internally).
58 GNUNET_SCALARPRODUCT_STATUS_ACTIVE = 0,
61 * The computation was successful.
63 GNUNET_SCALARPRODUCT_STATUS_SUCCESS,
66 * We encountered some error.
68 GNUNET_SCALARPRODUCT_STATUS_FAILURE,
71 * We got an invalid response.
73 GNUNET_SCALARPRODUCT_STATUS_INVALID_RESPONSE,
76 * We got disconnected from the SCALARPRODUCT service.
78 GNUNET_SCALARPRODUCT_STATUS_DISCONNECTED
83 * Opaque declaration of the SP-Handle
85 struct GNUNET_SCALARPRODUCT_Handle;
88 GNUNET_NETWORK_STRUCT_BEGIN
91 * An element key-value pair for scalarproduct
93 struct GNUNET_SCALARPRODUCT_Element
96 * Key used to identify matching pairs of values to multiply.
98 struct GNUNET_HashCode key;
101 * Value to multiply in scalar product, in NBO.
103 int64_t value GNUNET_PACKED;
106 GNUNET_NETWORK_STRUCT_END
110 * Continuation called to notify client about result of the
114 * @param status Status of the request
117 (*GNUNET_SCALARPRODUCT_ContinuationWithStatus) (void *cls,
118 enum GNUNET_SCALARPRODUCT_ResponseStatus status);
122 * Process a datum that was stored in the scalarproduct.
125 * @param status Status of the request
126 * @param result result of the computation
129 (*GNUNET_SCALARPRODUCT_DatumProcessor) (void *cls,
130 enum GNUNET_SCALARPRODUCT_ResponseStatus status,
135 * Entry in the request queue per client
137 struct GNUNET_SCALARPRODUCT_ComputationHandle;
141 * Request by Alice's client for computing a scalar product
143 * @param cfg the gnunet configuration handle
144 * @param session_key Session key should be unique to the requesting client
145 * @param peer PeerID of the other peer
146 * @param elements Array of elements of the vector
147 * @param element_count Number of elements in the @a elements vector
148 * @param cont Callback function
149 * @param cont_cls Closure for the @a cont callback function
150 * @return a new handle for this computation
152 struct GNUNET_SCALARPRODUCT_ComputationHandle *
153 GNUNET_SCALARPRODUCT_start_computation (const struct GNUNET_CONFIGURATION_Handle *cfg,
154 const struct GNUNET_HashCode *session_key,
155 const struct GNUNET_PeerIdentity *peer,
156 const struct GNUNET_SCALARPRODUCT_Element *elements,
157 uint32_t element_count,
158 GNUNET_SCALARPRODUCT_DatumProcessor cont,
163 * Used by Bob's client to cooperate with Alice,
165 * @param cfg the gnunet configuration handle
166 * @param session_key Session key unique to the requesting client
167 * @param elements Array of elements of the vector
168 * @param element_count Number of elements in the @a elements vector
169 * @param cont Callback function
170 * @param cont_cls Closure for the @a cont callback function
171 * @return a new handle for this computation
173 struct GNUNET_SCALARPRODUCT_ComputationHandle *
174 GNUNET_SCALARPRODUCT_accept_computation (const struct GNUNET_CONFIGURATION_Handle *cfg,
175 const struct GNUNET_HashCode *key,
176 const struct GNUNET_SCALARPRODUCT_Element *elements,
177 uint32_t element_count,
178 GNUNET_SCALARPRODUCT_ContinuationWithStatus cont,
183 * Cancel an ongoing computation or revoke our collaboration offer.
184 * Closes the connection to the service
186 * @param h computation handle to terminate
189 GNUNET_SCALARPRODUCT_cancel (struct GNUNET_SCALARPRODUCT_ComputationHandle *h);
192 #if 0 /* keep Emacsens' auto-indent happy */
201 /** @} */ /* end of group */