rdata/generic/dname_39.c

	dname_39.c revision 6e49e91bd08778d7eae45a2229dcf41ed97cc636
/*
 * Copyright (C) 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: dname_39.c,v 1.18 2000/04/27 00:02:25 tale Exp $ */

/* Reviewed: Wed Mar 15 16:52:38 PST 2000 by explorer */

/* draft-ietf-dnsind-dname-02.txt */

#ifndef RDATA_GENERIC_DNAME_39_C
#define RDATA_GENERIC_DNAME_39_C

#define RRTYPE_DNAME_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON)

static inline isc_result_t
fromtext_dname(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 == 39);

    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_dname(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 == 39);

    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_dname(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 == 39);

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

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

static inline isc_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);

    if (dns_compress_getedns(cctx) >= 1)
        dns_compress_setmethods(cctx, DNS_COMPRESS_ALL);
    else
        dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);

    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_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->rdclass == rdata2->rdclass);
    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);

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

static inline isc_result_t
fromstruct_dname(dns_rdataclass_t rdclass, dns_rdatatype_t type, void *source,
         isc_buffer_t *target)
{
    UNUSED(rdclass);
    UNUSED(source);
    UNUSED(target);

    REQUIRE(type == 39);

    return (ISC_R_NOTIMPLEMENTED);
}

static inline isc_result_t
tostruct_dname(dns_rdata_t *rdata, void *target, isc_mem_t *mctx)
{
    UNUSED(target);
    UNUSED(mctx);

    REQUIRE(rdata->type == 39);
    REQUIRE(target != NULL);

    return (ISC_R_NOTIMPLEMENTED);
}

static inline void
freestruct_dname(void *source)
{
    REQUIRE(source != NULL);
    REQUIRE(ISC_FALSE); /* XXX */
}

static inline isc_result_t
additionaldata_dname(dns_rdata_t *rdata, dns_additionaldatafunc_t add,
             void *arg)
{
    UNUSED(add);
    UNUSED(arg);

    REQUIRE(rdata->type == 39);

    return (ISC_R_SUCCESS);
}

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

    REQUIRE(rdata->type == 39);

    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_DNAME_39_C */