diff options
Diffstat (limited to 'lib/dns/rdata/generic/nsec_47.c')
| -rw-r--r-- | lib/dns/rdata/generic/nsec_47.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/nsec_47.c b/lib/dns/rdata/generic/nsec_47.c new file mode 100644 index 0000000..77700be --- /dev/null +++ b/lib/dns/rdata/generic/nsec_47.c @@ -0,0 +1,291 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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. + */ + +/* 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 | DNS_RDATATYPEATTR_ZONECUTAUTH | \ + DNS_RDATATYPEATTR_ATCNAME) + +static 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, + 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, false)); +} + +static 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, false, target)); + /* + * Don't leave a trailing space when there's no typemap present. + */ + if (sr.length > 0) { + RETERR(str_totext(" ", target)); + } + return (typemap_totext(&sr, NULL, target)); +} + +static 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, false)); + RETERR(mem_tobuffer(target, sr.base, sr.length)); + isc_buffer_forward(source, sr.length); + return (ISC_R_SUCCESS); +} + +static 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 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 isc_result_t +fromstruct_nsec(ARGS_FROMSTRUCT) { + dns_rdata_nsec_t *nsec = source; + isc_region_t region; + + REQUIRE(type == dns_rdatatype_nsec); + REQUIRE(nsec != 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, ®ion); + RETERR(isc_buffer_copyregion(target, ®ion)); + + region.base = nsec->typebits; + region.length = nsec->len; + RETERR(typemap_test(®ion, false)); + return (mem_tobuffer(target, nsec->typebits, nsec->len)); +} + +static 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(nsec != 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, ®ion); + dns_name_fromregion(&name, ®ion); + isc_region_consume(®ion, name_length(&name)); + dns_name_init(&nsec->next, NULL); + 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 void +freestruct_nsec(ARGS_FREESTRUCT) { + dns_rdata_nsec_t *nsec = source; + + REQUIRE(nsec != 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 isc_result_t +additionaldata_nsec(ARGS_ADDLDATA) { + REQUIRE(rdata->type == dns_rdatatype_nsec); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static 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 bool +checkowner_nsec(ARGS_CHECKOWNER) { + REQUIRE(type == dns_rdatatype_nsec); + + UNUSED(name); + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (true); +} + +static bool +checknames_nsec(ARGS_CHECKNAMES) { + REQUIRE(rdata->type == dns_rdatatype_nsec); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (true); +} + +static 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, ®ion1); + dns_rdata_toregion(rdata2, ®ion2); + + dns_name_fromregion(&name1, ®ion1); + dns_name_fromregion(&name2, ®ion2); + + order = dns_name_rdatacompare(&name1, &name2); + if (order != 0) { + return (order); + } + + isc_region_consume(®ion1, name_length(&name1)); + isc_region_consume(®ion2, name_length(&name2)); + + return (isc_region_compare(®ion1, ®ion2)); +} +#endif /* RDATA_GENERIC_NSEC_47_C */ |