+
+/** @defgroup GRAS_msg_rpc RPC specific functions
+ * @ingroup GRAS_msg
+ *
+ * Remote Procedure Call (RPC) are a classical mecanism to request a service
+ * from a remote host. Using this set of functions, you let GRAS doing most of
+ * the work of sending the request, wait for an answer, make sure it is the
+ * right answer from the right host and so on. Any exception raised on the
+ * server is also passed over the network to the client.
+ *
+ * Callbacks are attached to RPC incomming messages the regular way using
+ * \ref gras_cb_register.
+ *
+ * For an example of use, check the examples/gras/rpc directory of the distribution.
+ */
+/** @{ */
+
+/* declaration */
+void gras_msgtype_declare_rpc(const char *name,
+ gras_datadesc_type_t payload_request,
+ gras_datadesc_type_t payload_answer);
+
+void gras_msgtype_declare_rpc_v(const char *name,
+ short int version,
+ gras_datadesc_type_t payload_request,
+ gras_datadesc_type_t payload_answer);
+
+/* client side */
+void gras_msg_rpccall(gras_socket_t server,
+ double timeOut,
+ gras_msgtype_t msgtype,
+ void *request, void *answer);
+gras_msg_cb_ctx_t
+gras_msg_rpc_async_call(gras_socket_t server,
+ double timeOut,
+ gras_msgtype_t msgtype,
+ void *request);
+void gras_msg_rpc_async_wait(gras_msg_cb_ctx_t ctx,
+ void *answer);
+
+/* server side */
+void gras_msg_rpcreturn(double timeOut, gras_msg_cb_ctx_t ctx,void *answer);
+
+
+/** @} */
+