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/* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * 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. */ #ifndef DNS_CLIENTINFO_H #define DNS_CLIENTINFO_H 1 /***** ***** Module Info *****/ /*! \file dns/clientinfo.h * \brief * The DNS clientinfo interface allows libdns to retrieve information * about the client from the caller. * * The clientinfo interface is used by the DNS DB and DLZ interfaces; * it allows databases to modify their answers on the basis of information * about the client, such as source IP address. * * dns_clientinfo_t contains a pointer to an opaque structure containing * client information in some form. dns_clientinfomethods_t contains a * list of methods which operate on that opaque structure to return * potentially useful data. Both structures also contain versioning * information. */ /***** ***** Imports *****/ #include <inttypes.h> #include <isc/sockaddr.h> #include <isc/types.h> ISC_LANG_BEGINDECLS /***** ***** Types *****/ #define DNS_CLIENTINFO_VERSION 2 typedef struct dns_clientinfo { uint16_t version; void *data; void *dbversion; } dns_clientinfo_t; typedef isc_result_t (*dns_clientinfo_sourceip_t)(dns_clientinfo_t *client, isc_sockaddr_t **addrp); #define DNS_CLIENTINFOMETHODS_VERSION 2 #define DNS_CLIENTINFOMETHODS_AGE 1 typedef struct dns_clientinfomethods { uint16_t version; uint16_t age; dns_clientinfo_sourceip_t sourceip; } dns_clientinfomethods_t; /***** ***** Methods *****/ void dns_clientinfomethods_init(dns_clientinfomethods_t *methods, dns_clientinfo_sourceip_t sourceip); void dns_clientinfo_init(dns_clientinfo_t *ci, void *data, void *versionp); ISC_LANG_ENDDECLS #endif /* DNS_CLIENTINFO_H */