rdata/generic/dname_39.c

	dname_39.c revision 40f53fa8d9c6a4fc38c0014495e7a42b08f52481
/*
 * 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 1.25 2000/08/01 01:25:13 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(ARGS_FROMTEXT) {
    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(ARGS_TOTEXT) {
    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(ARGS_FROMWIRE) {
    dns_name_t name;

    UNUSED(rdclass);

    REQUIRE(type == 39);

    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(ARGS_TOWIRE) {
    dns_name_t name;
    isc_region_t region;

    REQUIRE(rdata->type == 39);

    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(ARGS_COMPARE) {
    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(ARGS_FROMSTRUCT) {
    dns_rdata_dname_t *dname = source;
    isc_region_t region;

    REQUIRE(type == 39);
    REQUIRE(source != NULL);
    REQUIRE(dname->common.rdtype == type);
    REQUIRE(dname->common.rdclass == rdclass);

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

static inline isc_result_t
tostruct_dname(ARGS_TOSTRUCT) {
    isc_region_t region;
    dns_rdata_dname_t *dname = target;
    dns_name_t name;

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

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

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

static inline void
freestruct_dname(ARGS_FREESTRUCT) {
    dns_rdata_dname_t *dname = source;

    REQUIRE(source != NULL);
    REQUIRE(dname->common.rdtype == 39);

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

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

static inline isc_result_t
additionaldata_dname(ARGS_ADDLDATA) {
    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    REQUIRE(rdata->type == 39);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_dname(ARGS_DIGEST) {
    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 */