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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#pragma once
#include <inttypes.h>
#include <isc/lang.h>
#include <isc/netaddr.h>
#include <isc/types.h>
#include <dns/rdatatype.h>
#include <dns/types.h>
/*%
* Maximum scope values for IPv4 and IPv6.
*/
#ifndef ECS_MAX_V4_SCOPE
#define ECS_MAX_V4_SCOPE 24
#endif
#ifndef ECS_MAX_V6_SCOPE
#define ECS_MAX_V6_SCOPE 56
#endif
/*
* Any updates to this structure should also be applied in
* contrib/modules/dlz/dlz_minmal.h.
*/
struct dns_ecs {
isc_netaddr_t addr;
uint8_t source;
uint8_t scope;
};
/* <address>/NNN/NNN */
#define DNS_ECS_FORMATSIZE (ISC_NETADDR_FORMATSIZE + 9)
ISC_LANG_BEGINDECLS
void
dns_ecs_init(dns_ecs_t *ecs);
/*%<
* Initialize a DNS ECS structure.
*
* Requires:
* \li 'ecs' is not NULL and points to a valid dns_ecs structure.
*/
bool
dns_ecs_equals(const dns_ecs_t *ecs1, const dns_ecs_t *ecs2);
/*%<
* Determine whether two ECS address prefixes are equal (except the
* scope prefix-length field).
*
* 'ecs1->source' must exactly match 'ecs2->source'; the address families
* must match; and the first 'ecs1->source' bits of the addresses must
* match. Subsequent address bits and the 'scope' values are ignored.
*/
void
dns_ecs_format(const dns_ecs_t *ecs, char *buf, size_t size);
/*%<
* Format an ECS record as text. Result is guaranteed to be null-terminated.
*
* Requires:
* \li 'ecs' is not NULL.
* \li 'buf' is not NULL.
* \li 'size' is at least DNS_ECS_FORMATSIZE
*/
ISC_LANG_ENDDECLS
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