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/* Copyright (C) 2019 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 <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "knot/nameserver/log.h"
#include "libknot/packet/pkt.h"
/*!
* \brief EDNS data.
*/
struct query_edns_data {
uint16_t max_payload;
bool do_flag;
};
/*!
* \brief Initialize new packet.
*
* Clear the packet and generate random transaction ID.
*
* \param pkt Packet to initialize.
*/
void query_init_pkt(knot_pkt_t *pkt);
/*!
* \brief Initialize EDNS parameters from server configuration.
*
* \param[out] edns EDNS parameters to initialize.
* \param[in] conf Server configuration.
* \param[in] zone Zone name.
* \param[in] remote_family Address family for remote host.
*
* \return KNOT_E*
*/
int query_edns_data_init(struct query_edns_data *edns, conf_t *conf,
const knot_dname_t *zone, int remote_family);
/*!
* \brief Append EDNS into the packet.
*
* \param pkt Packet to add EDNS into.
* \param edns EDNS data.
*
* \return KNOT_E*
*/
int query_put_edns(knot_pkt_t *pkt, const struct query_edns_data *edns);
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