/*

 * 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.

 */

#ifndef RDATA_GENERIC_CNAME_5_C

#define RDATA_GENERIC_CNAME_5_C

#define RRTYPE_CNAME_ATTRIBUTES \

  (DNS_RDATATYPEATTR_EXCLUSIVE | DNS_RDATATYPEATTR_SINGLETON)

static isc_result_t

fromtext_cname(ARGS_FROMTEXT) {

  isc_token_t token;

  isc_buffer_t buffer;

  REQUIRE(type == dns_rdatatype_cname);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(callbacks);

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,

              false));

  buffer_fromregion(&buffer, &token.value.as_region);

  if (origin == NULL) {

    origin = dns_rootname;

  }

  RETTOK(dns_name_wirefromtext(&buffer, origin, options, target));

  return ISC_R_SUCCESS;

}

static isc_result_t

totext_cname(ARGS_TOTEXT) {

  isc_region_t region;

  dns_name_t name;

  dns_name_t prefix;

  unsigned int opts;

  REQUIRE(rdata->type == dns_rdatatype_cname);

  REQUIRE(rdata->length != 0);

  dns_name_init(&name);

  dns_name_init(&prefix);

  dns_rdata_toregion(rdata, &region);

  dns_name_fromregion(&name, &region);

  opts = name_prefix(&name, tctx->origin, &prefix) ? DNS_NAME_OMITFINALDOT

               : 0;

  return dns_name_totext(&prefix, opts, target);

}

static isc_result_t

fromwire_cname(ARGS_FROMWIRE) {

  dns_name_t name;

  REQUIRE(type == dns_rdatatype_cname);

  UNUSED(type);

  UNUSED(rdclass);

  dctx = dns_decompress_setpermitted(dctx, true);

  dns_name_init(&name);

  return dns_name_fromwire(&name, source, dctx, target);

}

static isc_result_t

towire_cname(ARGS_TOWIRE) {

  dns_name_t name;

  isc_region_t region;

  REQUIRE(rdata->type == dns_rdatatype_cname);

  REQUIRE(rdata->length != 0);

  dns_compress_setpermitted(cctx, true);

  dns_name_init(&name);

  dns_rdata_toregion(rdata, &region);

  dns_name_fromregion(&name, &region);

  return dns_name_towire(&name, cctx, target);

}

static int

compare_cname(ARGS_COMPARE) {

  dns_name_t name1;

  dns_name_t name2;

  isc_region_t region1;

  isc_region_t region2;

  REQUIRE(rdata1->type == rdata2->type);

  REQUIRE(rdata1->rdclass == rdata2->rdclass);

  REQUIRE(rdata1->type == dns_rdatatype_cname);

  REQUIRE(rdata1->length != 0);

  REQUIRE(rdata2->length != 0);

  dns_name_init(&name1);

  dns_name_init(&name2);

  dns_rdata_toregion(rdata1, &region1);

  dns_rdata_toregion(rdata2, &region2);

  dns_name_fromregion(&name1, &region1);

  dns_name_fromregion(&name2, &region2);

  return dns_name_rdatacompare(&name1, &name2);

}

static isc_result_t

fromstruct_cname(ARGS_FROMSTRUCT) {

  dns_rdata_cname_t *cname = source;

  isc_region_t region;

  REQUIRE(type == dns_rdatatype_cname);

  REQUIRE(cname != NULL);

  REQUIRE(cname->common.rdtype == type);

  REQUIRE(cname->common.rdclass == rdclass);

  UNUSED(type);

  UNUSED(rdclass);

  dns_name_toregion(&cname->cname, &region);

  return isc_buffer_copyregion(target, &region);

}

static isc_result_t

tostruct_cname(ARGS_TOSTRUCT) {

  isc_region_t region;

  dns_rdata_cname_t *cname = target;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_cname);

  REQUIRE(cname != NULL);

  REQUIRE(rdata->length != 0);

  DNS_RDATACOMMON_INIT(cname, rdata->type, rdata->rdclass);

  dns_name_init(&name);

  dns_rdata_toregion(rdata, &region);

  dns_name_fromregion(&name, &region);

  dns_name_init(&cname->cname);

  name_duporclone(&name, mctx, &cname->cname);

  cname->mctx = mctx;

  return ISC_R_SUCCESS;

}

static void

freestruct_cname(ARGS_FREESTRUCT) {

  dns_rdata_cname_t *cname = source;

  REQUIRE(cname != NULL);

  if (cname->mctx == NULL) {

    return;

  }

  dns_name_free(&cname->cname, cname->mctx);

  cname->mctx = NULL;

}

static isc_result_t

additionaldata_cname(ARGS_ADDLDATA) {

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(add);

  UNUSED(arg);

  REQUIRE(rdata->type == dns_rdatatype_cname);

  return ISC_R_SUCCESS;

}

static isc_result_t

digest_cname(ARGS_DIGEST) {

  isc_region_t r;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_cname);

  dns_rdata_toregion(rdata, &r);

  dns_name_init(&name);

  dns_name_fromregion(&name, &r);

  return dns_name_digest(&name, digest, arg);

}

static bool

checkowner_cname(ARGS_CHECKOWNER) {

  REQUIRE(type == dns_rdatatype_cname);

  UNUSED(name);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(wildcard);

  return true;

}

static bool

checknames_cname(ARGS_CHECKNAMES) {

  REQUIRE(rdata->type == dns_rdatatype_cname);

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(bad);

  return true;

}

static int

casecompare_cname(ARGS_COMPARE) {

  return compare_cname(rdata1, rdata2);

}

#endif /* RDATA_GENERIC_CNAME_5_C */