/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: nsec_47.c,v 1.13 2020/09/14 08:40:43 florian Exp $ */

/* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */

/* RFC 3845 */

#ifndef RDATA_GENERIC_NSEC_47_C
#define RDATA_GENERIC_NSEC_47_C

/*
 * The attributes do not include DNS_RDATATYPEATTR_SINGLETON
 * because we must be able to handle a parent/child NSEC pair.
 */

static inline isc_result_t
totext_nsec(ARGS_TOTEXT) {
	isc_region_t sr;
	dns_name_t name;

	REQUIRE(rdata->type == dns_rdatatype_nsec);
	REQUIRE(rdata->length != 0);

	UNUSED(tctx);

	dns_name_init(&name, NULL);
	dns_rdata_toregion(rdata, &sr);
	dns_name_fromregion(&name, &sr);
	isc_region_consume(&sr, name_length(&name));
	RETERR(dns_name_totext(&name, 0, target));
	/*
	 * Don't leave a trailing space when there's no typemap present.
	 */
	if (sr.length > 0) {
		RETERR(isc_str_tobuffer(" ", target));
	}
	return (typemap_totext(&sr, NULL, target));
}

static /* inline */ isc_result_t
fromwire_nsec(ARGS_FROMWIRE) {
	isc_region_t sr;
	dns_name_t name;

	REQUIRE(type == dns_rdatatype_nsec);

	UNUSED(type);
	UNUSED(rdclass);

	dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

	dns_name_init(&name, NULL);
	RETERR(dns_name_fromwire(&name, source, dctx, options, target));

	isc_buffer_activeregion(source, &sr);
	RETERR(typemap_test(&sr, 0));
	RETERR(isc_mem_tobuffer(target, sr.base, sr.length));
	isc_buffer_forward(source, sr.length);
	return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_nsec(ARGS_TOWIRE) {
	isc_region_t sr;
	dns_name_t name;
	dns_offsets_t offsets;

	REQUIRE(rdata->type == dns_rdatatype_nsec);
	REQUIRE(rdata->length != 0);

	dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
	dns_name_init(&name, offsets);
	dns_rdata_toregion(rdata, &sr);
	dns_name_fromregion(&name, &sr);
	isc_region_consume(&sr, name_length(&name));
	RETERR(dns_name_towire(&name, cctx, target));

	return (isc_mem_tobuffer(target, sr.base, sr.length));
}

#endif	/* RDATA_GENERIC_NSEC_47_C */