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/* Copyright (C) 2022 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/journal/journal_read.h"
#include "knot/nameserver/process_query.h"
#include "knot/nameserver/xfr.h"
#include "libknot/packet/pkt.h"
/*! \brief IXFR-in processing states. */
enum ixfr_state {
IXFR_INVALID = 0,
IXFR_START, /* IXFR-in starting, expecting final SOA. */
IXFR_SOA_DEL, /* Expecting starting SOA. */
IXFR_SOA_ADD, /* Expecting ending SOA. */
IXFR_DEL, /* Expecting RR to delete. */
IXFR_ADD, /* Expecting RR to add. */
IXFR_DONE /* Processing done, IXFR-in complete. */
};
/*! \brief Extended structure for IXFR-in/IXFR-out processing. */
struct ixfr_proc {
/* Processing state. */
struct xfr_proc proc;
enum ixfr_state state;
bool in_remove_section;
/* Changes to be sent. */
journal_read_t *journal_ctx;
/* Currently processed RRSet. */
knot_rrset_t cur_rr;
/* Processing context. */
knotd_qdata_t *qdata;
knot_mm_t *mm;
uint32_t soa_from;
uint32_t soa_to;
uint32_t soa_last;
};
/*!
* \brief IXFR query processing module.
*
* \retval PRODUCE if it has an answer, but not yet finished.
* \retval FAIL if it encountered an error.
* \retval DONE if finished.
*/
int ixfr_process_query(knot_pkt_t *pkt, knotd_qdata_t *qdata);
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