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/* Copyright (C) 2017 Farsight Security, Inc. <software@farsightsecurity.com>
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 3 of the License, or
(at your option) any later version.
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*!
* \brief Dnstap file reader.
*/
#pragma once
#include <fstrm.h>
#include <protobuf-c/protobuf-c.h>
#include "contrib/dnstap/dnstap.pb-c.h"
/*! \brief Structure for dnstap file reader. */
typedef struct {
/*!< Input reader. */
struct fstrm_reader *fr;
} dt_reader_t;
/*!
* \brief Creates dnstap file reader structure.
*
* \param file_path Name of file to read input from.
*
* \retval reader if success.
* \retval NULL if error.
*/
dt_reader_t* dt_reader_create(const char *file_path);
/*!
* \brief Close dnstap file reader.
*
* \param reader dnstap file reader structure.
*/
void dt_reader_free(dt_reader_t *reader);
/*!
* \brief Read a dnstap protobuf from a dnstap file reader.
*
* Caller must deallocate the returned protobuf with the
* dnstap__dnstap__free_unpacked() function.
*
* \param[in] reader dnstap file reader structure.
* \param[out] d Unpacked dnstap protobuf.
*
* \retval KNOT_EOK
* \retval KNOT_ERROR
* \retval KNOT_EOF
* \retval KNOT_ENOMEM
*/
int dt_reader_read(dt_reader_t *reader, Dnstap__Dnstap **d);
/*!
* \brief free the frame allocated by dt_read_data.
*
* \param reader Dnstap reader context.
* \param d The frame to be freed.
*/
void dt_reader_free_frame(dt_reader_t *reader, Dnstap__Dnstap **d);
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