/*

 * 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.

 */

/* RFC1183 */

#ifndef RDATA_GENERIC_AFSDB_18_C

#define RDATA_GENERIC_AFSDB_18_C

#define RRTYPE_AFSDB_ATTRIBUTES (0)

static isc_result_t

fromtext_afsdb(ARGS_FROMTEXT) {

  isc_token_t token;

  isc_buffer_t buffer;

  dns_fixedname_t fn;

  dns_name_t *name = dns_fixedname_initname(&fn);

  bool ok;

  REQUIRE(type == dns_rdatatype_afsdb);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(callbacks);

  /*

   * Subtype.

   */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  if (token.value.as_ulong > 0xffffU) {

    RETTOK(ISC_R_RANGE);

  }

  RETERR(uint16_tobuffer(token.value.as_ulong, target));

  /*

   * Hostname.

   */

  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_fromtext(name, &buffer, origin, options));

  RETTOK(dns_name_towire(name, NULL, target));

  ok = true;

  if ((options & DNS_RDATA_CHECKNAMES) != 0) {

    ok = dns_name_ishostname(name, false);

  }

  if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0) {

    RETTOK(DNS_R_BADNAME);

  }

  if (!ok && callbacks != NULL) {

    warn_badname(name, lexer, callbacks);

  }

  return ISC_R_SUCCESS;

}

static isc_result_t

totext_afsdb(ARGS_TOTEXT) {

  dns_name_t name;

  dns_name_t prefix;

  isc_region_t region;

  char buf[sizeof("64000 ")];

  unsigned int num, opts;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  REQUIRE(rdata->length != 0);

  dns_name_init(&name);

  dns_name_init(&prefix);

  dns_rdata_toregion(rdata, &region);

  num = uint16_fromregion(&region);

  isc_region_consume(&region, 2);

  snprintf(buf, sizeof(buf), "%u ", num);

  RETERR(str_totext(buf, target));

  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_afsdb(ARGS_FROMWIRE) {

  dns_name_t name;

  isc_region_t sr;

  isc_region_t tr;

  REQUIRE(type == dns_rdatatype_afsdb);

  UNUSED(type);

  UNUSED(rdclass);

  /*

   * RFC 3597 section 4 asks receivers to decompress this type,

   * even though senders must not compress it.

   */

  dctx = dns_decompress_setpermitted(dctx, true);

  dns_name_init(&name);

  isc_buffer_activeregion(source, &sr);

  isc_buffer_availableregion(target, &tr);

  if (tr.length < 2) {

    return ISC_R_NOSPACE;

  }

  if (sr.length < 2) {

    return ISC_R_UNEXPECTEDEND;

  }

  memmove(tr.base, sr.base, 2);

  isc_buffer_forward(source, 2);

  isc_buffer_add(target, 2);

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

}

static isc_result_t

towire_afsdb(ARGS_TOWIRE) {

  isc_region_t tr;

  isc_region_t sr;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  REQUIRE(rdata->length != 0);

  dns_compress_setpermitted(cctx, false);

  isc_buffer_availableregion(target, &tr);

  dns_rdata_toregion(rdata, &sr);

  if (tr.length < 2) {

    return ISC_R_NOSPACE;

  }

  memmove(tr.base, sr.base, 2);

  isc_region_consume(&sr, 2);

  isc_buffer_add(target, 2);

  dns_name_init(&name);

  dns_name_fromregion(&name, &sr);

  return dns_name_towire(&name, cctx, target);

}

static int

compare_afsdb(ARGS_COMPARE) {

  int result;

  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_afsdb);

  REQUIRE(rdata1->length != 0);

  REQUIRE(rdata2->length != 0);

  result = memcmp(rdata1->data, rdata2->data, 2);

  if (result != 0) {

    return result < 0 ? -1 : 1;

  }

  dns_name_init(&name1);

  dns_name_init(&name2);

  dns_rdata_toregion(rdata1, &region1);

  dns_rdata_toregion(rdata2, &region2);

  isc_region_consume(&region1, 2);

  isc_region_consume(&region2, 2);

  dns_name_fromregion(&name1, &region1);

  dns_name_fromregion(&name2, &region2);

  return dns_name_rdatacompare(&name1, &name2);

}

static isc_result_t

fromstruct_afsdb(ARGS_FROMSTRUCT) {

  dns_rdata_afsdb_t *afsdb = source;

  isc_region_t region;

  REQUIRE(type == dns_rdatatype_afsdb);

  REQUIRE(afsdb != NULL);

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

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

  UNUSED(type);

  UNUSED(rdclass);

  RETERR(uint16_tobuffer(afsdb->subtype, target));

  dns_name_toregion(&afsdb->server, &region);

  return isc_buffer_copyregion(target, &region);

}

static isc_result_t

tostruct_afsdb(ARGS_TOSTRUCT) {

  isc_region_t region;

  dns_rdata_afsdb_t *afsdb = target;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  REQUIRE(afsdb != NULL);

  REQUIRE(rdata->length != 0);

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

  dns_name_init(&afsdb->server);

  dns_rdata_toregion(rdata, &region);

  afsdb->subtype = uint16_fromregion(&region);

  isc_region_consume(&region, 2);

  dns_name_init(&name);

  dns_name_fromregion(&name, &region);

  dns_name_clone(&name, &afsdb->server);

  return ISC_R_SUCCESS;

}

static isc_result_t

additionaldata_afsdb(ARGS_ADDLDATA) {

  dns_name_t name;

  isc_region_t region;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  UNUSED(owner);

  dns_name_init(&name);

  dns_rdata_toregion(rdata, &region);

  isc_region_consume(&region, 2);

  dns_name_fromregion(&name, &region);

  return (add)(arg, &name, dns_rdatatype_a, NULL DNS__DB_FILELINE);

}

static isc_result_t

digest_afsdb(ARGS_DIGEST) {

  isc_region_t r1, r2;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  dns_rdata_toregion(rdata, &r1);

  r2 = r1;

  isc_region_consume(&r2, 2);

  r1.length = 2;

  RETERR((digest)(arg, &r1));

  dns_name_init(&name);

  dns_name_fromregion(&name, &r2);

  return dns_name_digest(&name, digest, arg);

}

static bool

checkowner_afsdb(ARGS_CHECKOWNER) {

  REQUIRE(type == dns_rdatatype_afsdb);

  UNUSED(name);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(wildcard);

  return true;

}

static bool

checknames_afsdb(ARGS_CHECKNAMES) {

  isc_region_t region;

  dns_name_t name;

  REQUIRE(rdata->type == dns_rdatatype_afsdb);

  UNUSED(owner);

  dns_rdata_toregion(rdata, &region);

  isc_region_consume(&region, 2);

  dns_name_init(&name);

  dns_name_fromregion(&name, &region);

  if (!dns_name_ishostname(&name, false)) {

    if (bad != NULL) {

      dns_name_clone(&name, bad);

    }

    return false;

  }

  return true;

}

static int

casecompare_afsdb(ARGS_COMPARE) {

  return compare_afsdb(rdata1, rdata2);

}

#endif /* RDATA_GENERIC_AFSDB_18_C */