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/* Copyright (C) 2020 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/zone/contents.h"
#include "knot/updates/zone-update.h"
typedef struct {
const zone_contents_t *zone;
zone_tree_t *changed_nodes;
bool nsec3_param_changed;
} adjust_ctx_t;
typedef int (*adjust_cb_t)(zone_node_t *, adjust_ctx_t *);
/*
* \brief Various callbacks for adjusting zone node's params and pointers.
*
* \param node Node to be adjusted. Must be already inside the zone contents!
* \param zone Zone being adjusted.
*
* \return KNOT_E*
*/
// fix NORMAL node flags, like NODE_FLAGS_NONAUTH, NODE_FLAGS_DELEG etc.
int adjust_cb_flags(zone_node_t *node, adjust_ctx_t *ctx);
// reset pointer to NSEC3 node
int unadjust_cb_point_to_nsec3(zone_node_t *node, adjust_ctx_t *ctx);
// fix NORMAL node pointer to NSEC3 node proving nonexistence of wildcard
int adjust_cb_wildcard_nsec3(zone_node_t *node, adjust_ctx_t *ctx);
// fix NSEC3 node flags: NODE_FLAGS_IN_NSEC3_CHAIN
int adjust_cb_nsec3_flags(zone_node_t *node, adjust_ctx_t *ctx);
// fix pointer at corresponding NSEC3 node
int adjust_cb_nsec3_pointer(zone_node_t *node, adjust_ctx_t *ctx);
// fix NORMAL node flags to additionals, like NS records and glue...
int adjust_cb_additionals(zone_node_t *node, adjust_ctx_t *ctx);
// adjust_cb_flags and adjust_cb_nsec3_pointer at once
int adjust_cb_flags_and_nsec3(zone_node_t *node, adjust_ctx_t *ctx);
// adjust_cb_nsec3_pointer, adjust_cb_wildcard_nsec3 and adjust_cb_additionals at once
int adjust_cb_nsec3_and_additionals(zone_node_t *node, adjust_ctx_t *ctx);
// adjust_cb_wildcard_nsec3 and adjust_cb_nsec3_pointer at once
int adjust_cb_nsec3_and_wildcard(zone_node_t *node, adjust_ctx_t *ctx);
// dummy callback, just make prev pointers adjusting and zone size measuring work
int adjust_cb_void(zone_node_t *node, adjust_ctx_t *ctx);
/*!
* \brief Apply callback to NSEC3 and NORMAL nodes. Fix PREV pointers and measure zone size.
*
* \param zone Zone to be adjusted.
* \param nodes_cb Callback for NORMAL nodes.
* \param nsec3_cb Callback for NSEC3 nodes.
* \param measure_zone While adjusting, count the size and max TTL of the zone.
* \param adjust_prevs Also (re-)generate node->prev pointers.
* \param threads Operate in parallel using specified threads.
* \param add_changed Special tree to add any changed node (by adjusting) into.
*
* \return KNOT_E*
*/
int zone_adjust_contents(zone_contents_t *zone, adjust_cb_t nodes_cb, adjust_cb_t nsec3_cb,
bool measure_zone, bool adjust_prevs, unsigned threads,
zone_tree_t *add_changed);
/*!
* \brief Apply callback to nodes affected by the zone update.
*
* \note Fixing PREV pointers and zone measurement does not make sense since we are not
* iterating over whole zone. The same applies for callback that reference other
* (unchanged, but indirectly affected) zone nodes.
*
* \param update Zone update being finalized.
* \param nodes_cb Callback for NORMAL nodes.
* \param nsec3_cb Callback for NSEC3 nodes.
* \param measure_diff While adjusting, count the size difference and max TTL change.
*
* \return KNOT_E*
*/
int zone_adjust_update(zone_update_t *update, adjust_cb_t nodes_cb, adjust_cb_t nsec3_cb, bool measure_diff);
/*!
* \brief Do a general-purpose full update.
*
* This operates in two phases, first fix basic node flags and prev pointers,
* than nsec3-related pointers and additionals.
*
* \param zone Zone to be adjusted.
* \param threads Parallelize some adjusting using specified threads.
*
* \return KNOT_E*
*/
int zone_adjust_full(zone_contents_t *zone, unsigned threads);
/*!
* \brief Do a generally approved adjust after incremental update.
*
* \param update Zone update to be adjusted incrementally.
* \param threads Parallelize some adjusting using specified threads.
*
* \return KNOT_E*
*/
int zone_adjust_incremental_update(zone_update_t *update, unsigned threads);
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