/*
* Copyright (C) 2003, 2004, 2007-2009, 2011, 2015, 2016 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 http://mozilla.org/MPL/2.0/.
*/
/* $Id: nsec_47.c,v 1.15 2011/01/13 04:59:26 tbox Exp $ */
/* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
/* RFC 3845 */
#ifndef RDATA_GENERIC_NSEC_47_C
#define RDATA_GENERIC_NSEC_47_C
/*
* The attributes do not include DNS_RDATATYPEATTR_SINGLETON
* because we must be able to handle a parent/child NSEC pair.
*/
#define RRTYPE_NSEC_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC)
static inline isc_result_t
fromtext_nsec(ARGS_FROMTEXT) {
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
REQUIRE(type == dns_rdatatype_nsec);
UNUSED(type);
UNUSED(rdclass);
UNUSED(callbacks);
/*
* Next domain.
*/
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
dns_name_init(&name, NULL);
buffer_fromregion(&buffer, &token.value.as_region);
if (origin == NULL)
origin = dns_rootname;
RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
return (typemap_fromtext(lexer, target, ISC_FALSE));
}
static inline isc_result_t
totext_nsec(ARGS_TOTEXT) {
isc_region_t sr;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_nsec);
REQUIRE(rdata->length != 0);
UNUSED(tctx);
dns_name_init(&name, NULL);
dns_rdata_toregion(rdata, &sr);
dns_name_fromregion(&name, &sr);
isc_region_consume(&sr, name_length(&name));
RETERR(dns_name_totext(&name, ISC_FALSE, target));
return (typemap_totext(&sr, NULL, target));
}
static /* inline */ isc_result_t
fromwire_nsec(ARGS_FROMWIRE) {
isc_region_t sr;
dns_name_t name;
REQUIRE(type == dns_rdatatype_nsec);
UNUSED(type);
UNUSED(rdclass);
dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
dns_name_init(&name, NULL);
RETERR(dns_name_fromwire(&name, source, dctx, options, target));
isc_buffer_activeregion(source, &sr);
RETERR(typemap_test(&sr, ISC_FALSE));
RETERR(mem_tobuffer(target, sr.base, sr.length));
isc_buffer_forward(source, sr.length);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
towire_nsec(ARGS_TOWIRE) {
isc_region_t sr;
dns_name_t name;
dns_offsets_t offsets;
REQUIRE(rdata->type == dns_rdatatype_nsec);
REQUIRE(rdata->length != 0);
dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
dns_name_init(&name, offsets);
dns_rdata_toregion(rdata, &sr);
dns_name_fromregion(&name, &sr);
isc_region_consume(&sr, name_length(&name));
RETERR(dns_name_towire(&name, cctx, target));
return (mem_tobuffer(target, sr.base, sr.length));
}
static inline int
compare_nsec(ARGS_COMPARE) {
isc_region_t r1;
isc_region_t r2;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == dns_rdatatype_nsec);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
return (isc_region_compare(&r1, &r2));
}
static inline isc_result_t
fromstruct_nsec(ARGS_FROMSTRUCT) {
dns_rdata_nsec_t *nsec = source;
isc_region_t region;
REQUIRE(type == dns_rdatatype_nsec);
REQUIRE(source != NULL);
REQUIRE(nsec->common.rdtype == type);
REQUIRE(nsec->common.rdclass == rdclass);
REQUIRE(nsec->typebits != NULL || nsec->len == 0);
UNUSED(type);
UNUSED(rdclass);
dns_name_toregion(&nsec->next, &region);
RETERR(isc_buffer_copyregion(target, &region));
region.base = nsec->typebits;
region.length = nsec->len;
RETERR(typemap_test(&region, ISC_FALSE));
return (mem_tobuffer(target, nsec->typebits, nsec->len));
}
static inline isc_result_t
tostruct_nsec(ARGS_TOSTRUCT) {
isc_region_t region;
dns_rdata_nsec_t *nsec = target;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_nsec);
REQUIRE(target != NULL);
REQUIRE(rdata->length != 0);
nsec->common.rdclass = rdata->rdclass;
nsec->common.rdtype = rdata->type;
ISC_LINK_INIT(&nsec->common, link);
dns_name_init(&name, NULL);
dns_rdata_toregion(rdata, &region);
dns_name_fromregion(&name, &region);
isc_region_consume(&region, name_length(&name));
dns_name_init(&nsec->next, NULL);
RETERR(name_duporclone(&name, mctx, &nsec->next));
nsec->len = region.length;
nsec->typebits = mem_maybedup(mctx, region.base, region.length);
if (nsec->typebits == NULL)
goto cleanup;
nsec->mctx = mctx;
return (ISC_R_SUCCESS);
cleanup:
if (mctx != NULL)
dns_name_free(&nsec->next, mctx);
return (ISC_R_NOMEMORY);
}
static inline void
freestruct_nsec(ARGS_FREESTRUCT) {
dns_rdata_nsec_t *nsec = source;
REQUIRE(source != NULL);
REQUIRE(nsec->common.rdtype == dns_rdatatype_nsec);
if (nsec->mctx == NULL)
return;
dns_name_free(&nsec->next, nsec->mctx);
if (nsec->typebits != NULL)
isc_mem_free(nsec->mctx, nsec->typebits);
nsec->mctx = NULL;
}
static inline isc_result_t
additionaldata_nsec(ARGS_ADDLDATA) {
REQUIRE(rdata->type == dns_rdatatype_nsec);
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_nsec(ARGS_DIGEST) {
isc_region_t r;
REQUIRE(rdata->type == dns_rdatatype_nsec);
dns_rdata_toregion(rdata, &r);
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_nsec(ARGS_CHECKOWNER) {
REQUIRE(type == dns_rdatatype_nsec);
UNUSED(name);
UNUSED(type);
UNUSED(rdclass);
UNUSED(wildcard);
return (ISC_TRUE);
}
static inline isc_boolean_t
checknames_nsec(ARGS_CHECKNAMES) {
REQUIRE(rdata->type == dns_rdatatype_nsec);
UNUSED(rdata);
UNUSED(owner);
UNUSED(bad);
return (ISC_TRUE);
}
static inline int
casecompare_nsec(ARGS_COMPARE) {
isc_region_t region1;
isc_region_t region2;
dns_name_t name1;
dns_name_t name2;
int order;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == dns_rdatatype_nsec);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_name_init(&name1, NULL);
dns_name_init(&name2, NULL);
dns_rdata_toregion(rdata1, &region1);
dns_rdata_toregion(rdata2, &region2);
dns_name_fromregion(&name1, &region1);
dns_name_fromregion(&name2, &region2);
order = dns_name_rdatacompare(&name1, &name2);
if (order != 0)
return (order);
isc_region_consume(&region1, name_length(&name1));
isc_region_consume(&region2, name_length(&name2));
return (isc_region_compare(&region1, &region2));
}
#endif /* RDATA_GENERIC_NSEC_47_C */