00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
174 lines
4.5 KiB
C
174 lines
4.5 KiB
C
/* $NetBSD: byaddr.h,v 1.4 2014/12/10 04:37:58 christos Exp $ */
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/*
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* Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2000-2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: byaddr.h,v 1.22 2007/06/19 23:47:16 tbox Exp */
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#ifndef DNS_BYADDR_H
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#define DNS_BYADDR_H 1
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/*****
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***** Module Info
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*****/
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/*! \file dns/byaddr.h
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* \brief
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* The byaddr module provides reverse lookup services for IPv4 and IPv6
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* addresses.
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*
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* MP:
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*\li The module ensures appropriate synchronization of data structures it
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* creates and manipulates.
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*
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* Reliability:
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*\li No anticipated impact.
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*
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* Resources:
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*\li TBS
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*
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* Security:
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*\li No anticipated impact.
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*
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* Standards:
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*\li RFCs: 1034, 1035, 2181, TBS
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*\li Drafts: TBS
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*/
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#include <isc/lang.h>
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#include <isc/event.h>
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#include <dns/types.h>
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ISC_LANG_BEGINDECLS
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/*%
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* A 'dns_byaddrevent_t' is returned when a byaddr completes.
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* The sender field will be set to the byaddr that completed. If 'result'
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* is ISC_R_SUCCESS, then 'names' will contain a list of names associated
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* with the address. The recipient of the event must not change the list
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* and must not refer to any of the name data after the event is freed.
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*/
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typedef struct dns_byaddrevent {
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ISC_EVENT_COMMON(struct dns_byaddrevent);
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isc_result_t result;
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dns_namelist_t names;
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} dns_byaddrevent_t;
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/*
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* This option is deprecated since we now only consider nibbles.
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#define DNS_BYADDROPT_IPV6NIBBLE 0x0001
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*/
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/*% Note DNS_BYADDROPT_IPV6NIBBLE is now deprecated. */
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#define DNS_BYADDROPT_IPV6INT 0x0002
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isc_result_t
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dns_byaddr_create(isc_mem_t *mctx, isc_netaddr_t *address, dns_view_t *view,
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unsigned int options, isc_task_t *task,
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isc_taskaction_t action, void *arg, dns_byaddr_t **byaddrp);
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/*%<
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* Find the domain name of 'address'.
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*
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* Notes:
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*
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*\li There is a reverse lookup format for IPv6 addresses, 'nibble'
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*
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*\li The 'nibble' format for that address is
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*
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* \code
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* 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa.
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* \endcode
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*
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*\li #DNS_BYADDROPT_IPV6INT can be used to get nibble lookups under ip6.int.
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*
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* Requires:
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*
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*\li 'mctx' is a valid mctx.
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*
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*\li 'address' is a valid IPv4 or IPv6 address.
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*
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*\li 'view' is a valid view which has a resolver.
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*
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*\li 'task' is a valid task.
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*
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*\li byaddrp != NULL && *byaddrp == NULL
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*
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* Returns:
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*
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*\li #ISC_R_SUCCESS
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*\li #ISC_R_NOMEMORY
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*
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*\li Any resolver-related error (e.g. #ISC_R_SHUTTINGDOWN) may also be
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* returned.
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*/
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void
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dns_byaddr_cancel(dns_byaddr_t *byaddr);
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/*%<
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* Cancel 'byaddr'.
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*
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* Notes:
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*
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*\li If 'byaddr' has not completed, post its #DNS_EVENT_BYADDRDONE
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* event with a result code of #ISC_R_CANCELED.
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*
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* Requires:
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*
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*\li 'byaddr' is a valid byaddr.
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*/
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void
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dns_byaddr_destroy(dns_byaddr_t **byaddrp);
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/*%<
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* Destroy 'byaddr'.
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*
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* Requires:
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*
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*\li '*byaddrp' is a valid byaddr.
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*
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*\li The caller has received the #DNS_EVENT_BYADDRDONE event (either because
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* the byaddr completed or because dns_byaddr_cancel() was called).
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*
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* Ensures:
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*
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*\li *byaddrp == NULL.
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*/
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isc_result_t
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dns_byaddr_createptrname(isc_netaddr_t *address, isc_boolean_t nibble,
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dns_name_t *name);
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isc_result_t
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dns_byaddr_createptrname2(isc_netaddr_t *address, unsigned int options,
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dns_name_t *name);
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/*%<
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* Creates a name that would be used in a PTR query for this address. The
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* nibble flag indicates that the 'nibble' format is to be used if an IPv6
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* address is provided, instead of the 'bitstring' format. Since we dropped
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* the support of the bitstring labels, it is expected that the flag is always
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* set. 'options' are the same as for dns_byaddr_create().
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*
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* Requires:
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*
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* \li 'address' is a valid address.
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* \li 'name' is a valid name with a dedicated buffer.
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*/
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ISC_LANG_ENDDECLS
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#endif /* DNS_BYADDR_H */
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