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280 lines
6.2 KiB
C
280 lines
6.2 KiB
C
/*
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* Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1998-2002 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 ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: opt_41.c,v 1.31 2005/04/29 00:23:14 marka Exp $ */
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/* Reviewed: Thu Mar 16 14:06:44 PST 2000 by gson */
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/* RFC2671 */
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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 | \
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DNS_RDATATYPEATTR_META | \
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DNS_RDATATYPEATTR_NOTQUESTION)
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static inline isc_result_t
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fromtext_opt(ARGS_FROMTEXT) {
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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(type);
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UNUSED(rdclass);
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UNUSED(lexer);
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UNUSED(origin);
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UNUSED(options);
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UNUSED(target);
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UNUSED(callbacks);
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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(ARGS_TOTEXT) {
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isc_region_t r;
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isc_region_t or;
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isc_uint16_t option;
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isc_uint16_t length;
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char buf[sizeof("64000 64000")];
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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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dns_rdata_toregion(rdata, &r);
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while (r.length > 0) {
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option = uint16_fromregion(&r);
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isc_region_consume(&r, 2);
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length = uint16_fromregion(&r);
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isc_region_consume(&r, 2);
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sprintf(buf, "%u %u", option, length);
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RETERR(str_totext(buf, target));
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INSIST(r.length >= length);
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if (length > 0) {
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(str_totext(" (", target));
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RETERR(str_totext(tctx->linebreak, target));
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or = r;
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or.length = length;
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RETERR(isc_base64_totext(&or, tctx->width - 2,
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tctx->linebreak, target));
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isc_region_consume(&r, length);
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(str_totext(" )", target));
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}
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if (r.length > 0)
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RETERR(str_totext(" ", target));
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}
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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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fromwire_opt(ARGS_FROMWIRE) {
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isc_region_t sregion;
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isc_region_t tregion;
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isc_uint16_t length;
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unsigned int total;
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REQUIRE(type == 41);
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UNUSED(type);
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UNUSED(rdclass);
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UNUSED(dctx);
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UNUSED(options);
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isc_buffer_activeregion(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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/*
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* Eat the 16bit option code. There is nothing to
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* be done with it currently.
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*/
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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_activeregion(source, &sregion);
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isc_buffer_availableregion(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(ARGS_TOWIRE) {
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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(ARGS_COMPARE) {
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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 (isc_region_compare(&r1, &r2));
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}
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static inline isc_result_t
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fromstruct_opt(ARGS_FROMSTRUCT) {
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dns_rdata_opt_t *opt = source;
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isc_region_t region;
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isc_uint16_t length;
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REQUIRE(type == 41);
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REQUIRE(source != NULL);
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REQUIRE(opt->common.rdtype == type);
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REQUIRE(opt->common.rdclass == rdclass);
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REQUIRE(opt->options != NULL || opt->length == 0);
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UNUSED(type);
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UNUSED(rdclass);
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region.base = opt->options;
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region.length = opt->length;
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while (region.length >= 4) {
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isc_region_consume(®ion, 2); /* opt */
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length = uint16_fromregion(®ion);
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isc_region_consume(®ion, 2);
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if (region.length < length)
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return (ISC_R_UNEXPECTEDEND);
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isc_region_consume(®ion, length);
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}
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if (region.length != 0)
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return (ISC_R_UNEXPECTEDEND);
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return (mem_tobuffer(target, opt->options, opt->length));
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}
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static inline isc_result_t
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tostruct_opt(ARGS_TOSTRUCT) {
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dns_rdata_opt_t *opt = target;
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isc_region_t r;
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REQUIRE(rdata->type == 41);
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REQUIRE(target != NULL);
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opt->common.rdclass = rdata->rdclass;
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opt->common.rdtype = rdata->type;
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ISC_LINK_INIT(&opt->common, link);
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dns_rdata_toregion(rdata, &r);
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opt->length = r.length;
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opt->options = mem_maybedup(mctx, r.base, r.length);
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if (opt->options == NULL)
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return (ISC_R_NOMEMORY);
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opt->offset = 0;
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opt->mctx = mctx;
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return (ISC_R_SUCCESS);
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}
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static inline void
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freestruct_opt(ARGS_FREESTRUCT) {
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dns_rdata_opt_t *opt = source;
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REQUIRE(source != NULL);
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REQUIRE(opt->common.rdtype == 41);
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if (opt->mctx == NULL)
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return;
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if (opt->options != NULL)
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isc_mem_free(opt->mctx, opt->options);
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opt->mctx = NULL;
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}
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static inline isc_result_t
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additionaldata_opt(ARGS_ADDLDATA) {
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REQUIRE(rdata->type == 41);
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UNUSED(rdata);
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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(ARGS_DIGEST) {
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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(rdata);
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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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static inline isc_boolean_t
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checkowner_opt(ARGS_CHECKOWNER) {
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REQUIRE(type == 41);
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UNUSED(type);
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UNUSED(rdclass);
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UNUSED(wildcard);
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return (dns_name_equal(name, dns_rootname));
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}
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static inline isc_boolean_t
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checknames_opt(ARGS_CHECKNAMES) {
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REQUIRE(rdata->type == 41);
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UNUSED(rdata);
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UNUSED(owner);
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UNUSED(bad);
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return (ISC_TRUE);
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}
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#endif /* RDATA_GENERIC_OPT_41_C */
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