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/*
This file is part of GNUnet
(C)
GNUnet 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 3, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file include/gnunet_sensor_service.h
* @brief API to the sensor service
* @author Omar Tarabai
*/
#ifndef GNUNET_SENSOR_SERVICE_H
#define GNUNET_SENSOR_SERVICE_H
#include "platform.h"
#include "gnunet_util_lib.h"
#ifdef __cplusplus
extern "C"
{
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
/**
* Handle to the sensor service.
*/
struct GNUNET_SENSOR_Handle;
/**
* Structure containing brief info about sensor
*/
struct SensorInfoShort
{
/*
* Sensor name
*/
char *name;
/*
* First part of version number
*/
uint16_t version_major;
/*
* Second part of version number
*/
uint16_t version_minor;
/*
* Sensor description
*/
char *description;
};
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Used to communicate sensor readings to
* collection points (SENSORDASHBAORD service)
*/
struct GNUNET_SENSOR_Reading
{
/**
* GNUNET general message header
*/
struct GNUNET_MessageHeader *header;
/**
* Size of the sensor name value, allocated
* at position 0 after this struct
*/
size_t sensorname_size;
/**
* First part of sensor version number
*/
uint16_t sensorversion_major;
/**
* Second part of sensor version number
*/
uint16_t sensorversion_minor;
/**
* Timestamp of recorded reading
*/
uint64_t timestamp;
/**
* Size of reading value, allocation
* at poistion 1 after this struct
*/
size_t value_size;
};
GNUNET_NETWORK_STRUCT_END
/**
* Type of an iterator over sensor definitions.
*
* @param cls closure
* @param hello hello message for the peer (can be NULL)
* @param error message
*/
typedef void (*GNUNET_SENSOR_SensorIteratorCB) (void *cls,
const struct SensorInfoShort *sensor,
const char *err_msg);
/**
* Continuation called with a status result.
*
* @param cls closure
* @param emsg error message, NULL on success
*/
typedef void (*GNUNET_SENSOR_Continuation)(void *cls,
const char *emsg);
/**
* Connect to the sensor service.
*
* @return NULL on error
*/
struct GNUNET_SENSOR_Handle *
GNUNET_SENSOR_connect (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
* Disconnect from the sensor service
*
* @param h handle to disconnect
*/
void
GNUNET_SENSOR_disconnect(struct GNUNET_SENSOR_Handle *h);
/**
* Client asking to iterate all available sensors
*
* @param h Handle to SENSOR service
* @param timeout how long to wait until timing out
* @param sensorname information on one sensor only, can be NULL to get all
* @param sensorname_len length of the sensorname parameter
* @param callback the method to call for each sensor
* @param callback_cls closure for callback
* @return iterator context
*/
struct GNUNET_SENSOR_SensorIteratorContext *
GNUNET_SENSOR_iterate_sensors (struct GNUNET_SENSOR_Handle *h,
struct GNUNET_TIME_Relative timeout,
const char* sensorname, size_t sensorname_len,
GNUNET_SENSOR_SensorIteratorCB callback, void *callback_cls);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
#endif
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