189 lines
4.3 KiB
C
189 lines
4.3 KiB
C
/*
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* Copyright (C) 1998, 1999, 2000 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/* $Id: opt_41.c,v 1.8 2000/04/14 20:13:49 explorer Exp $ */
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/* Reviewed: Thu Mar 16 14:06:44 PST 2000 by gson */
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/* RFC 2671 */
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#ifndef RDATA_GENERIC_OPT_41_C
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#define RDATA_GENERIC_OPT_41_C
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#define RRTYPE_OPT_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON | DNS_RDATATYPEATTR_META | DNS_RDATATYPEATTR_NOTQUESTION)
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static inline isc_result_t
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fromtext_opt(dns_rdataclass_t rdclass, dns_rdatatype_t type,
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isc_lex_t *lexer, dns_name_t *origin,
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isc_boolean_t downcase, isc_buffer_t *target)
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{
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/*
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* OPT records do not have a text format.
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*/
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REQUIRE(type == 41);
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UNUSED(rdclass);
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UNUSED(lexer);
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UNUSED(origin);
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UNUSED(downcase);
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UNUSED(target);
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return (ISC_R_NOTIMPLEMENTED);
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}
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static inline isc_result_t
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totext_opt(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
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isc_buffer_t *target)
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{
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/*
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* OPT records do not have a text format.
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*/
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REQUIRE(rdata->type == 41);
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UNUSED(tctx);
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UNUSED(target);
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return (ISC_R_NOTIMPLEMENTED);
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}
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static inline isc_result_t
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fromwire_opt(dns_rdataclass_t rdclass, dns_rdatatype_t type,
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isc_buffer_t *source, dns_decompress_t *dctx,
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isc_boolean_t downcase, isc_buffer_t *target)
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{
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isc_region_t sregion;
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isc_region_t tregion;
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isc_uint16_t option, length;
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unsigned int total;
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REQUIRE(type == 41);
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UNUSED(rdclass);
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UNUSED(dctx);
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UNUSED(downcase);
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isc_buffer_active(source, &sregion);
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total = 0;
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while (sregion.length != 0) {
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if (sregion.length < 4)
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return (ISC_R_UNEXPECTEDEND);
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option = uint16_fromregion(&sregion);
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isc_region_consume(&sregion, 2);
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length = uint16_fromregion(&sregion);
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isc_region_consume(&sregion, 2);
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total += 4;
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if (sregion.length < length)
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return (ISC_R_UNEXPECTEDEND);
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isc_region_consume(&sregion, length);
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total += length;
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}
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isc_buffer_active(source, &sregion);
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isc_buffer_available(target, &tregion);
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if (tregion.length < total)
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return (ISC_R_NOSPACE);
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memcpy(tregion.base, sregion.base, total);
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isc_buffer_forward(source, total);
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isc_buffer_add(target, total);
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return (ISC_R_SUCCESS);
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}
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static inline isc_result_t
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towire_opt(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
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REQUIRE(rdata->type == 41);
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UNUSED(cctx);
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return (mem_tobuffer(target, rdata->data, rdata->length));
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}
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static inline int
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compare_opt(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
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isc_region_t r1;
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isc_region_t r2;
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REQUIRE(rdata1->type == rdata2->type);
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REQUIRE(rdata1->rdclass == rdata2->rdclass);
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REQUIRE(rdata1->type == 41);
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dns_rdata_toregion(rdata1, &r1);
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dns_rdata_toregion(rdata2, &r2);
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return (compare_region(&r1, &r2));
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}
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static inline isc_result_t
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fromstruct_opt(dns_rdataclass_t rdclass, dns_rdatatype_t type, void *source,
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isc_buffer_t *target)
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{
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REQUIRE(type == 41);
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UNUSED(rdclass);
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UNUSED(source);
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UNUSED(target);
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return (ISC_R_NOTIMPLEMENTED);
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}
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static inline isc_result_t
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tostruct_opt(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
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REQUIRE(rdata->type == 41);
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UNUSED(target);
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UNUSED(mctx);
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return (ISC_R_NOTIMPLEMENTED);
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}
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static inline void
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freestruct_opt(void *source) {
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UNUSED(source);
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}
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static inline isc_result_t
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additionaldata_opt(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
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void *arg)
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{
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REQUIRE(rdata->type == 41);
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UNUSED(add);
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UNUSED(arg);
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return (ISC_R_SUCCESS);
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}
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static inline isc_result_t
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digest_opt(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {
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/*
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* OPT records are not digested.
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*/
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REQUIRE(rdata->type == 41);
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UNUSED(digest);
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UNUSED(arg);
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return (ISC_R_NOTIMPLEMENTED);
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}
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#endif /* RDATA_GENERIC_OPT_41_C */
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