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/* Copyright (C) 2021 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 "libknot/packet/pkt.h"
#include "knot/include/module.h"
#include "knot/nameserver/process_query.h"
/*! \brief Don't follow CNAME/DNAME chain beyond this depth. */
#define CNAME_CHAIN_MAX 5
/*!
* \brief Answer query from an IN class zone.
*
* \retval KNOT_STATE_FAIL if it encountered an error.
* \retval KNOT_STATE_DONE if finished.
*/
int internet_process_query(knot_pkt_t *pkt, knotd_qdata_t *qdata);
/*! \brief Require given QUERY TYPE or return error code. */
#define NS_NEED_QTYPE(qdata, qtype_want, error_rcode) \
if (knot_pkt_qtype((qdata)->query) != (qtype_want)) { \
qdata->rcode = (error_rcode); \
return KNOT_STATE_FAIL; \
}
/*! \brief Require given QUERY NAME or return error code. */
#define NS_NEED_QNAME(qdata, qname_want, error_rcode) \
if (!knot_dname_is_equal(knot_pkt_qname((qdata)->query), (qname_want))) { \
qdata->rcode = (error_rcode); \
return KNOT_STATE_FAIL; \
}
/*! \brief Require existing zone or return failure. */
#define NS_NEED_ZONE(qdata, error_rcode) \
if ((qdata)->extra->zone == NULL) { \
qdata->rcode = (error_rcode); \
if ((error_rcode) == KNOT_RCODE_REFUSED) { \
qdata->rcode_ede = KNOT_EDNS_EDE_NOTAUTH; \
} \
return KNOT_STATE_FAIL; \
}
/*! \brief Require existing zone contents or return failure. */
#define NS_NEED_ZONE_CONTENTS(qdata) \
if ((qdata)->extra->contents == NULL) { \
qdata->rcode = KNOT_RCODE_SERVFAIL; \
qdata->rcode_ede = KNOT_EDNS_EDE_INV_DATA; \
return KNOT_STATE_FAIL; \
}
/*! \brief Require authentication. */
#define NS_NEED_AUTH(qdata, action) \
if (!process_query_acl_check(conf(), (action), (qdata)) || \
process_query_verify(qdata) != KNOT_EOK) { \
return KNOT_STATE_FAIL; \
}
/*! \brief Require the zone not to be frozen. */
#define NS_NEED_NOT_FROZEN(qdata) \
if ((qdata)->extra->zone->events.ufrozen) { \
(qdata)->rcode = KNOT_RCODE_REFUSED; \
(qdata)->rcode_ede = KNOT_EDNS_EDE_NOT_READY; \
return KNOT_STATE_FAIL; \
}
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