bind/lib/dns/rdata/generic/md_3.c

/*
 * Copyright (C) 1998, 1999, 2000  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.
 */

/* $Id: md_3.c,v 1.31 2000/05/22 12:37:41 marka Exp $ */

/* Reviewed: Wed Mar 15 17:48:20 PST 2000 by bwelling */

#ifndef RDATA_GENERIC_MD_3_C
#define RDATA_GENERIC_MD_3_C

#define RRTYPE_MD_ATTRIBUTES (0)

static inline isc_result_t
fromtext_md(dns_rdataclass_t rdclass, 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;

	UNUSED(rdclass);

	REQUIRE(type == 3);

	RETERR(gettoken(lexer, &token, isc_tokentype_string, ISC_FALSE));

	dns_name_init(&name, NULL);
	buffer_fromregion(&buffer, &token.value.as_region);
	origin = (origin != NULL) ? origin : dns_rootname;
	return (dns_name_fromtext(&name, &buffer, origin, downcase, target));
}

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

	REQUIRE(rdata->type == 3);

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

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

	sub = name_prefix(&name, tctx->origin, &prefix);

	return (dns_name_totext(&prefix, sub, target));
}

static inline isc_result_t
fromwire_md(dns_rdataclass_t rdclass, dns_rdatatype_t type,
	    isc_buffer_t *source, dns_decompress_t *dctx,
	    isc_boolean_t downcase, isc_buffer_t *target)
{
        dns_name_t name;

	UNUSED(rdclass);

	REQUIRE(type == 3);

	dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

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

static inline isc_result_t
towire_md(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target) {
	dns_name_t name;
	isc_region_t region;

	REQUIRE(rdata->type == 3);

	dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

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

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

static inline int
compare_md(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->rdclass == rdata2->rdclass);
	REQUIRE(rdata1->type == 3);

	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);

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

static inline isc_result_t
fromstruct_md(dns_rdataclass_t rdclass, dns_rdatatype_t type, void *source,
	      isc_buffer_t *target)
{
	dns_rdata_md_t *md = source;
	isc_region_t region;

	REQUIRE(type == 3);
	REQUIRE(source != NULL);
	REQUIRE(md->common.rdtype == type);
	REQUIRE(md->common.rdclass == rdclass);

	dns_name_toregion(&md->md, &region);
	return (isc_buffer_copyregion(target, &region));
}

static inline isc_result_t
tostruct_md(dns_rdata_t *rdata, void *target, isc_mem_t *mctx) {
	dns_rdata_md_t *md = target;
	isc_region_t r;
	dns_name_t name;

	REQUIRE(rdata->type == 3);
	REQUIRE(target != NULL);

	md->common.rdclass = rdata->rdclass;
	md->common.rdtype = rdata->type;
	ISC_LINK_INIT(&md->common, link);

	dns_name_init(&name, NULL);
	dns_rdata_toregion(rdata, &r);
	dns_name_fromregion(&name, &r);
	dns_name_init(&md->md, NULL);
	RETERR(name_duporclone(&name, mctx, &md->md));
	md->mctx = mctx;
	return (ISC_R_SUCCESS);
}

static inline void
freestruct_md(void *source) {
	dns_rdata_md_t *md = source;

	REQUIRE(source != NULL);
	REQUIRE(md->common.rdtype == 3);

	if (md->mctx == NULL)
		return;

	dns_name_free(&md->md, md->mctx);
	md->mctx = NULL;
}

static inline isc_result_t
additionaldata_md(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
		  void *arg)
{
	dns_name_t name;
	isc_region_t region;

	REQUIRE(rdata->type == 3);

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

	return ((add)(arg, &name, dns_rdatatype_a));
}

static inline isc_result_t
digest_md(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {
	isc_region_t r;
	dns_name_t name;

	REQUIRE(rdata->type == 3);

	dns_rdata_toregion(rdata, &r);
	dns_name_init(&name, NULL);
	dns_name_fromregion(&name, &r);

	return (dns_name_digest(&name, digest, arg));
}

#endif	/* RDATA_GENERIC_MD_3_C */