oneechanhax/phunix
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
phunix/external/bsd/bind/dist/lib/dns/rdatalist.c
David van Moolenbroek 00b67f09dd Import NetBSD named(8) 
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
2017-03-21 22:00:06 +00:00

373 lines
8.5 KiB
C
Raw Permalink Blame History

/* $NetBSD: rdatalist.c,v 1.6 2015/07/08 17:28:59 christos Exp $ */
/*
* Copyright (C) 2004, 2005, 2007, 2008, 2010-2012, 2014 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2001, 2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* Id */
/*! \file */
#include <config.h>
#include <stddef.h>
#include <isc/util.h>
#include <dns/name.h>
#include <dns/nsec3.h>
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include "rdatalist_p.h"
static dns_rdatasetmethods_t methods = {
isc__rdatalist_disassociate,
isc__rdatalist_first,
isc__rdatalist_next,
isc__rdatalist_current,
isc__rdatalist_clone,
isc__rdatalist_count,
isc__rdatalist_addnoqname,
isc__rdatalist_getnoqname,
isc__rdatalist_addclosest,
isc__rdatalist_getclosest,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
void
dns_rdatalist_init(dns_rdatalist_t *rdatalist) {
REQUIRE(rdatalist != NULL);
/*
* Initialize rdatalist.
*/
rdatalist->rdclass = 0;
rdatalist->type = 0;
rdatalist->covers = 0;
rdatalist->ttl = 0;
ISC_LIST_INIT(rdatalist->rdata);
ISC_LINK_INIT(rdatalist, link);
}
isc_result_t
dns_rdatalist_tordataset(dns_rdatalist_t *rdatalist,
dns_rdataset_t *rdataset)
{
/*
* Make 'rdataset' refer to the rdata in 'rdatalist'.
*/
REQUIRE(rdatalist != NULL);
REQUIRE(DNS_RDATASET_VALID(rdataset));
REQUIRE(! dns_rdataset_isassociated(rdataset));
rdataset->methods = &methods;
rdataset->rdclass = rdatalist->rdclass;
rdataset->type = rdatalist->type;
rdataset->covers = rdatalist->covers;
rdataset->ttl = rdatalist->ttl;
rdataset->trust = 0;
rdataset->private1 = rdatalist;
rdataset->private2 = NULL;
rdataset->private3 = NULL;
rdataset->privateuint4 = 0;
rdataset->private5 = NULL;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_rdatalist_fromrdataset(dns_rdataset_t *rdataset,
dns_rdatalist_t **rdatalist)
{
REQUIRE(rdatalist != NULL && rdataset != NULL);
*rdatalist = rdataset->private1;
return (ISC_R_SUCCESS);
}
void
isc__rdatalist_disassociate(dns_rdataset_t *rdataset) {
UNUSED(rdataset);
}
isc_result_t
isc__rdatalist_first(dns_rdataset_t *rdataset) {
dns_rdatalist_t *rdatalist;
rdatalist = rdataset->private1;
rdataset->private2 = ISC_LIST_HEAD(rdatalist->rdata);
if (rdataset->private2 == NULL)
return (ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
isc_result_t
isc__rdatalist_next(dns_rdataset_t *rdataset) {
dns_rdata_t *rdata;
REQUIRE(rdataset != NULL);
rdata = rdataset->private2;
if (rdata == NULL)
return (ISC_R_NOMORE);
rdataset->private2 = ISC_LIST_NEXT(rdata, link);
if (rdataset->private2 == NULL)
return (ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
void
isc__rdatalist_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
dns_rdata_t *list_rdata;
REQUIRE(rdataset != NULL);
list_rdata = rdataset->private2;
INSIST(list_rdata != NULL);
dns_rdata_clone(list_rdata, rdata);
}
void
isc__rdatalist_clone(dns_rdataset_t *source, dns_rdataset_t *target) {
REQUIRE(source != NULL);
REQUIRE(target != NULL);
*target = *source;
/*
* Reset iterator state.
*/
target->private2 = NULL;
}
unsigned int
isc__rdatalist_count(dns_rdataset_t *rdataset) {
dns_rdatalist_t *rdatalist;
dns_rdata_t *rdata;
unsigned int count;
REQUIRE(rdataset != NULL);
rdatalist = rdataset->private1;
count = 0;
for (rdata = ISC_LIST_HEAD(rdatalist->rdata);
rdata != NULL;
rdata = ISC_LIST_NEXT(rdata, link))
count++;
return (count);
}
isc_result_t
isc__rdatalist_addnoqname(dns_rdataset_t *rdataset, dns_name_t *name) {
dns_rdataset_t *neg = NULL;
dns_rdataset_t *negsig = NULL;
dns_rdataset_t *rdset;
dns_ttl_t ttl;
REQUIRE(rdataset != NULL);
for (rdset = ISC_LIST_HEAD(name->list);
rdset != NULL;
rdset = ISC_LIST_NEXT(rdset, link))
{
if (rdset->rdclass != rdataset->rdclass)
continue;
if (rdset->type == dns_rdatatype_nsec ||
rdset->type == dns_rdatatype_nsec3)
neg = rdset;
}
if (neg == NULL)
return (ISC_R_NOTFOUND);
for (rdset = ISC_LIST_HEAD(name->list);
rdset != NULL;
rdset = ISC_LIST_NEXT(rdset, link))
{
if (rdset->type == dns_rdatatype_rrsig &&
rdset->covers == neg->type)
negsig = rdset;
}
if (negsig == NULL)
return (ISC_R_NOTFOUND);
/*
* Minimise ttl.
*/
ttl = rdataset->ttl;
if (neg->ttl < ttl)
ttl = neg->ttl;
if (negsig->ttl < ttl)
ttl = negsig->ttl;
rdataset->ttl = neg->ttl = negsig->ttl = ttl;
rdataset->attributes |= DNS_RDATASETATTR_NOQNAME;
rdataset->private6 = name;
return (ISC_R_SUCCESS);
}
isc_result_t
isc__rdatalist_getnoqname(dns_rdataset_t *rdataset, dns_name_t *name,
dns_rdataset_t *neg, dns_rdataset_t *negsig)
{
dns_rdataclass_t rdclass = rdataset->rdclass;
dns_rdataset_t *tneg = NULL;
dns_rdataset_t *tnegsig = NULL;
dns_name_t *noqname = rdataset->private6;
REQUIRE(rdataset != NULL);
REQUIRE((rdataset->attributes & DNS_RDATASETATTR_NOQNAME) != 0);
(void)dns_name_dynamic(noqname); /* Sanity Check. */
for (rdataset = ISC_LIST_HEAD(noqname->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link))
{
if (rdataset->rdclass != rdclass)
continue;
if (rdataset->type == dns_rdatatype_nsec ||
rdataset->type == dns_rdatatype_nsec3)
tneg = rdataset;
}
if (tneg == NULL)
return (ISC_R_NOTFOUND);
for (rdataset = ISC_LIST_HEAD(noqname->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link))
{
if (rdataset->type == dns_rdatatype_rrsig &&
rdataset->covers == tneg->type)
tnegsig = rdataset;
}
if (tnegsig == NULL)
return (ISC_R_NOTFOUND);
dns_name_clone(noqname, name);
dns_rdataset_clone(tneg, neg);
dns_rdataset_clone(tnegsig, negsig);
return (ISC_R_SUCCESS);
}
isc_result_t
isc__rdatalist_addclosest(dns_rdataset_t *rdataset, dns_name_t *name) {
dns_rdataset_t *neg = NULL;
dns_rdataset_t *negsig = NULL;
dns_rdataset_t *rdset;
dns_ttl_t ttl;
REQUIRE(rdataset != NULL);
for (rdset = ISC_LIST_HEAD(name->list);
rdset != NULL;
rdset = ISC_LIST_NEXT(rdset, link))
{
if (rdset->rdclass != rdataset->rdclass)
continue;
if (rdset->type == dns_rdatatype_nsec ||
rdset->type == dns_rdatatype_nsec3)
neg = rdset;
}
if (neg == NULL)
return (ISC_R_NOTFOUND);
for (rdset = ISC_LIST_HEAD(name->list);
rdset != NULL;
rdset = ISC_LIST_NEXT(rdset, link))
{
if (rdset->type == dns_rdatatype_rrsig &&
rdset->covers == neg->type)
negsig = rdset;
}
if (negsig == NULL)
return (ISC_R_NOTFOUND);
/*
* Minimise ttl.
*/
ttl = rdataset->ttl;
if (neg->ttl < ttl)
ttl = neg->ttl;
if (negsig->ttl < ttl)
ttl = negsig->ttl;
rdataset->ttl = neg->ttl = negsig->ttl = ttl;
rdataset->attributes |= DNS_RDATASETATTR_CLOSEST;
rdataset->private7 = name;
return (ISC_R_SUCCESS);
}
isc_result_t
isc__rdatalist_getclosest(dns_rdataset_t *rdataset, dns_name_t *name,
dns_rdataset_t *neg, dns_rdataset_t *negsig)
{
dns_rdataclass_t rdclass = rdataset->rdclass;
dns_rdataset_t *tneg = NULL;
dns_rdataset_t *tnegsig = NULL;
dns_name_t *closest = rdataset->private7;
REQUIRE(rdataset != NULL);
REQUIRE((rdataset->attributes & DNS_RDATASETATTR_CLOSEST) != 0);
(void)dns_name_dynamic(closest); /* Sanity Check. */
for (rdataset = ISC_LIST_HEAD(closest->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link))
{
if (rdataset->rdclass != rdclass)
continue;
if (rdataset->type == dns_rdatatype_nsec ||
rdataset->type == dns_rdatatype_nsec3)
tneg = rdataset;
}
if (tneg == NULL)
return (ISC_R_NOTFOUND);
for (rdataset = ISC_LIST_HEAD(closest->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link))
{
if (rdataset->type == dns_rdatatype_rrsig &&
rdataset->covers == tneg->type)
tnegsig = rdataset;
}
if (tnegsig == NULL)
return (ISC_R_NOTFOUND);
dns_name_clone(closest, name);
dns_rdataset_clone(tneg, neg);
dns_rdataset_clone(tnegsig, negsig);
return (ISC_R_SUCCESS);
}
Reference in New Issue View Git Blame Copy Permalink