diff options
Diffstat (limited to 'contrib/bind9/lib/dns/rdatalist.c')
| -rw-r--r-- | contrib/bind9/lib/dns/rdatalist.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/contrib/bind9/lib/dns/rdatalist.c b/contrib/bind9/lib/dns/rdatalist.c new file mode 100644 index 0000000..d6f11ae --- /dev/null +++ b/contrib/bind9/lib/dns/rdatalist.c @@ -0,0 +1,347 @@ +/* + * Copyright (C) 2004, 2005, 2007, 2008 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: rdatalist.c,v 1.36 2008/09/24 02:46:22 marka Exp $ */ + +/*! \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 +}; + +void +dns_rdatalist_init(dns_rdatalist_t *rdatalist) { + + /* + * 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; + + 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; + + 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) { + *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; + + 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; + + 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->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; + + 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->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); +} |
