/*

 * 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 7477 */

#ifndef RDATA_GENERIC_CSYNC_62_C

#define RDATA_GENERIC_CSYNC_62_C

#define RRTYPE_CSYNC_ATTRIBUTES 0

static isc_result_t

fromtext_csync(ARGS_FROMTEXT) {

  isc_token_t token;

  REQUIRE(type == dns_rdatatype_csync);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(origin);

  UNUSED(options);

  UNUSED(callbacks);

  /* Serial. */

  RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,

              false));

  RETERR(uint32_tobuffer(token.value.as_ulong, target));

  /* Flags. */

  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));

  /* Type Map */

  return typemap_fromtext(lexer, target, true);

}

static isc_result_t

totext_csync(ARGS_TOTEXT) {

  unsigned long num;

  char buf[sizeof("0123456789")]; /* Also TYPE65535 */

  isc_region_t sr;

  REQUIRE(rdata->type == dns_rdatatype_csync);

  REQUIRE(rdata->length >= 6);

  UNUSED(tctx);

  dns_rdata_toregion(rdata, &sr);

  num = uint32_fromregion(&sr);

  isc_region_consume(&sr, 4);

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

  RETERR(str_totext(buf, target));

  RETERR(str_totext(" ", target));

  num = uint16_fromregion(&sr);

  isc_region_consume(&sr, 2);

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

  RETERR(str_totext(buf, 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_csync(ARGS_FROMWIRE) {

  isc_region_t sr;

  REQUIRE(type == dns_rdatatype_csync);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(dctx);

  /*

   * Serial + Flags

   */

  isc_buffer_activeregion(source, &sr);

  if (sr.length < 6) {

    return ISC_R_UNEXPECTEDEND;

  }

  RETERR(mem_tobuffer(target, sr.base, 6));

  isc_buffer_forward(source, 6);

  isc_region_consume(&sr, 6);

  RETERR(typemap_test(&sr, true));

  RETERR(mem_tobuffer(target, sr.base, sr.length));

  isc_buffer_forward(source, sr.length);

  return ISC_R_SUCCESS;

}

static isc_result_t

towire_csync(ARGS_TOWIRE) {

  REQUIRE(rdata->type == dns_rdatatype_csync);

  REQUIRE(rdata->length >= 6);

  UNUSED(cctx);

  return mem_tobuffer(target, rdata->data, rdata->length);

}

static int

compare_csync(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_csync);

  REQUIRE(rdata1->length >= 6);

  REQUIRE(rdata2->length >= 6);

  dns_rdata_toregion(rdata1, &r1);

  dns_rdata_toregion(rdata2, &r2);

  return isc_region_compare(&r1, &r2);

}

static isc_result_t

fromstruct_csync(ARGS_FROMSTRUCT) {

  dns_rdata_csync_t *csync = source;

  isc_region_t region;

  REQUIRE(type == dns_rdatatype_csync);

  REQUIRE(csync != NULL);

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

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

  REQUIRE(csync->typebits != NULL || csync->len == 0);

  UNUSED(type);

  UNUSED(rdclass);

  RETERR(uint32_tobuffer(csync->serial, target));

  RETERR(uint16_tobuffer(csync->flags, target));

  region.base = csync->typebits;

  region.length = csync->len;

  RETERR(typemap_test(&region, true));

  return mem_tobuffer(target, csync->typebits, csync->len);

}

static isc_result_t

tostruct_csync(ARGS_TOSTRUCT) {

  isc_region_t region;

  dns_rdata_csync_t *csync = target;

  REQUIRE(rdata->type == dns_rdatatype_csync);

  REQUIRE(csync != NULL);

  REQUIRE(rdata->length != 0);

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

  dns_rdata_toregion(rdata, &region);

  csync->serial = uint32_fromregion(&region);

  isc_region_consume(&region, 4);

  csync->flags = uint16_fromregion(&region);

  isc_region_consume(&region, 2);

  csync->len = region.length;

  csync->typebits = mem_maybedup(mctx, region.base, region.length);

  csync->mctx = mctx;

  return ISC_R_SUCCESS;

}

static void

freestruct_csync(ARGS_FREESTRUCT) {

  dns_rdata_csync_t *csync = source;

  REQUIRE(csync != NULL);

  REQUIRE(csync->common.rdtype == dns_rdatatype_csync);

  if (csync->mctx == NULL) {

    return;

  }

  if (csync->typebits != NULL) {

    isc_mem_free(csync->mctx, csync->typebits);

  }

  csync->mctx = NULL;

}

static isc_result_t

additionaldata_csync(ARGS_ADDLDATA) {

  REQUIRE(rdata->type == dns_rdatatype_csync);

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(add);

  UNUSED(arg);

  return ISC_R_SUCCESS;

}

static isc_result_t

digest_csync(ARGS_DIGEST) {

  isc_region_t r;

  REQUIRE(rdata->type == dns_rdatatype_csync);

  dns_rdata_toregion(rdata, &r);

  return (digest)(arg, &r);

}

static bool

checkowner_csync(ARGS_CHECKOWNER) {

  REQUIRE(type == dns_rdatatype_csync);

  UNUSED(name);

  UNUSED(type);

  UNUSED(rdclass);

  UNUSED(wildcard);

  return true;

}

static bool

checknames_csync(ARGS_CHECKNAMES) {

  REQUIRE(rdata->type == dns_rdatatype_csync);

  UNUSED(rdata);

  UNUSED(owner);

  UNUSED(bad);

  return true;

}

static int

casecompare_csync(ARGS_COMPARE) {

  isc_region_t region1;

  isc_region_t region2;

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

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

  REQUIRE(rdata1->type == dns_rdatatype_csync);

  REQUIRE(rdata1->length >= 6);

  REQUIRE(rdata2->length >= 6);

  dns_rdata_toregion(rdata1, &region1);

  dns_rdata_toregion(rdata2, &region2);

  return isc_region_compare(&region1, &region2);

}

#endif /* RDATA_GENERIC_CSYNC_62_C */