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/*!
* \file query.h
*
* \author Lubos Slovak <lubos.slovak@nic.cz>
*
* \brief API for manipulating queries.
*
* \addtogroup libknot
* @{
*/
/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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 <http://www.gnu.org/licenses/>.
*/
#ifndef _KNOT_QUERY_H_
#define _KNOT_QUERY_H_
#include <stdint.h>
#include <string.h>
#include "libknot/packet/packet.h"
#include "libknot/dname.h"
#include "libknot/rrset.h"
#include "libknot/edns.h"
/*----------------------------------------------------------------------------*/
/*!
* \brief Checks if DNSSEC was requested in the query (i.e. the DO bit was set).
*
* \param query Packet where the parsed query is stored.
*
* \retval 0 if the DO bit was not set in the query, or the query is not yet
* parsed.
* \retval > 0 if DO bit was set in the query.
*/
int knot_query_dnssec_requested(const knot_packet_t *query);
/*!
* \brief Checks if NSID was requested in the query (i.e. the NSID option was
* present in the query OPT RR).
*
* \param query Packet where the parsed query is stored.
*
* \retval 0 if the NSID option was not present in the query, or the query is
* not yet parsed.
* \retval > 0 if the NSID option was present in the query.
*/
int knot_query_nsid_requested(const knot_packet_t *query);
int knot_query_edns_supported(const knot_packet_t *query);
int knot_query_init(knot_packet_t *query);
int knot_query_set_question(knot_packet_t *query,
const knot_dname_t *qname,
uint16_t qclass, uint16_t qtype);
int knot_query_set_opcode(knot_packet_t *query, uint8_t opcode);
/*!
* \brief Adds a RRSet to the Authority section of the query.
*
* \param query Query to add the RRSet into.
* \param rrset RRSet to be added.
*
* \retval KNOT_EOK if successful, or the RRSet was already in the query.
* \retval KNOT_ENOMEM
* \retval KNOT_ESPACE
*/
int knot_query_add_rrset_authority(knot_packet_t *query,
const knot_rrset_t *rrset);
#endif /* _KNOT_QUERY_H_ */
/*! @} */
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