dname_39.c 4.16 KB
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/*
 * Copyright (C) 1999 Internet Software Consortium.
 * 
 * Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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.
 */

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 /* $Id: dname_39.c,v 1.7 1999/06/08 10:35:09 gson Exp $ */
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 /* draft-ietf-dnsind-dname-02.txt */

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#ifndef RDATA_GENERIC_DNAME_39_C
#define RDATA_GENERIC_DNAME_39_C
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static dns_result_t
fromtext_dname(dns_rdataclass_t class, dns_rdatatype_t type,
	       isc_lex_t *lexer, dns_name_t *origin,
	       isc_boolean_t downcase, isc_buffer_t *target)
{
	isc_token_t token;
	dns_name_t name;
	isc_buffer_t buffer;

	REQUIRE(type == 39);
	class = class;	/*unused*/
	
	RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));
	
	dns_name_init(&name, NULL);
	buffer_fromregion(&buffer, &token.value.as_region,
			  ISC_BUFFERTYPE_TEXT);
	origin = (origin != NULL) ? origin : dns_rootname;
	return (dns_name_fromtext(&name, &buffer, origin, downcase, target));
}

static dns_result_t
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totext_dname(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx, 
	     isc_buffer_t *target) 
{
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	isc_region_t region;
	dns_name_t name;
	dns_name_t prefix;
	isc_boolean_t sub;

	REQUIRE(rdata->type == 39);

	dns_name_init(&name, NULL);
	dns_name_init(&prefix, NULL);

	dns_rdata_toregion(rdata, &region);
	dns_name_fromregion(&name, &region);

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	sub = name_prefix(&name, tctx->origin, &prefix);
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	return (dns_name_totext(&prefix, sub, target));
}

static dns_result_t
fromwire_dname(dns_rdataclass_t class, dns_rdatatype_t type,
	       isc_buffer_t *source, dns_decompress_t *dctx,
	       isc_boolean_t downcase, isc_buffer_t *target)
{
	dns_name_t name;

	REQUIRE(type == 39);
	class = class;	/*unused*/

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	if (dns_decompress_edns(dctx) >= 1 || !dns_decompress_strict(dctx))
		dns_decompress_setmethods(dctx, DNS_COMPRESS_ALL);
	else
		dns_decompress_setmethods(dctx, DNS_COMPRESS_LOCAL);

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	dns_name_init(&name, NULL);
	return(dns_name_fromwire(&name, source, dctx, downcase, target));
}

static dns_result_t
towire_dname(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
	dns_name_t name;
	isc_region_t region;

	REQUIRE(rdata->type == 39);

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	if (dns_compress_getedns(cctx) >= 1)
		dns_compress_setmethods(cctx, DNS_COMPRESS_ALL);
	else
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		dns_compress_setmethods(cctx, DNS_COMPRESS_LOCAL);
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	dns_name_init(&name, NULL);
	dns_rdata_toregion(rdata, &region);
	dns_name_fromregion(&name, &region);

	return (dns_name_towire(&name, cctx, target));
}

static int
compare_dname(dns_rdata_t *rdata1, dns_rdata_t *rdata2) {
	dns_name_t name1;
	dns_name_t name2;
	isc_region_t region1;
	isc_region_t region2;

	REQUIRE(rdata1->type == rdata2->type);
	REQUIRE(rdata1->class == rdata2->class);
	REQUIRE(rdata1->type == 39);

	dns_name_init(&name1, NULL);
	dns_name_init(&name2, NULL);

	dns_rdata_toregion(rdata1, &region1);
	dns_rdata_toregion(rdata2, &region2);

	dns_name_fromregion(&name1, &region1);
	dns_name_fromregion(&name2, &region2);

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	return (dns_name_rdatacompare(&name1, &name2));
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}

static dns_result_t
fromstruct_dname(dns_rdataclass_t class, dns_rdatatype_t type, void *source,
		 isc_buffer_t *target)
{

	REQUIRE(type == 39);

	class = class;	/*unused*/

	source = source;
	target = target;

	return (DNS_R_NOTIMPLEMENTED);
}

static dns_result_t
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tostruct_dname(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
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	REQUIRE(rdata->type == 39);
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	REQUIRE(target != NULL && target == NULL);
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	target = target;
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	mctx = mctx;
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	return (DNS_R_NOTIMPLEMENTED);
}
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static void
freestruct_dname(void *source) {
	REQUIRE(source != NULL && source != NULL);
	REQUIRE(ISC_FALSE);	/* XXX */
}
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#endif	/* RDATA_GENERIC_DNAME_39_C */