rdata/generic/null_10.c

	null_10.c revision 9281e7aa775026dc47c01745fdcc438645146877
/*
 * 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: null_10.c,v 1.23 2000/05/05 05:50:00 marka Exp $ */

/* Reviewed: Thu Mar 16 13:57:50 PST 2000 by explorer */

#ifndef RDATA_GENERIC_NULL_10_C
#define RDATA_GENERIC_NULL_10_C

#define RRTYPE_NULL_ATTRIBUTES (0)

static inline isc_result_t
fromtext_null(dns_rdataclass_t rdclass, dns_rdatatype_t type,
          isc_lex_t *lexer, dns_name_t *origin,
          isc_boolean_t downcase, isc_buffer_t *target)
{
    UNUSED(rdclass);
    UNUSED(type);
    UNUSED(lexer);
    UNUSED(origin);
    UNUSED(downcase);
    UNUSED(target);

    REQUIRE(type == 10);

    return (DNS_R_SYNTAX);
}

static inline isc_result_t
totext_null(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
        isc_buffer_t *target)
{
    UNUSED(rdata);
    UNUSED(tctx);
    UNUSED(target);

    REQUIRE(rdata->type == 10);

    return (DNS_R_SYNTAX);
}

static inline isc_result_t
fromwire_null(dns_rdataclass_t rdclass, dns_rdatatype_t type,
          isc_buffer_t *source, dns_decompress_t *dctx,
          isc_boolean_t downcase, isc_buffer_t *target)
{
    isc_region_t sr;

    UNUSED(rdclass);
    UNUSED(dctx);
    UNUSED(downcase);

    REQUIRE(type == 10);

    isc_buffer_activeregion(source, &sr);
    isc_buffer_forward(source, sr.length);
    return (mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_null(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target)
{
    UNUSED(cctx);

    REQUIRE(rdata->type == 10);

    return (mem_tobuffer(target, rdata->data, rdata->length));
}

static inline int
compare_null(dns_rdata_t *rdata1, dns_rdata_t *rdata2)
{
    isc_region_t r1;
    isc_region_t r2;

    REQUIRE(rdata1->type == rdata1->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 10);

    dns_rdata_toregion(rdata1, &r1);
    dns_rdata_toregion(rdata2, &r2);
    return (compare_region(&r1, &r2));
}

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

    REQUIRE(type == 10);

    return (ISC_R_NOTIMPLEMENTED);
}

static inline isc_result_t
tostruct_null(dns_rdata_t *rdata, void *target, isc_mem_t *mctx)
{
    dns_rdata_null_t *null = target;
    isc_region_t r;

    REQUIRE(rdata->type == 10);
    REQUIRE(target != NULL);

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

    dns_rdata_toregion(rdata, &r);
    null->length = r.length;
    if (null->length != 0) {
        null->data = mem_maybedup(mctx, r.base, r.length);
        if (null->data == NULL)
            return (ISC_R_NOMEMORY);
    } else
        null->data = NULL;

    null->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_null(void *source)
{
    dns_rdata_null_t *null = source;

    REQUIRE(source != NULL);
    REQUIRE(null->common.rdtype == 10);

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

    if (null->data != NULL)
        isc_mem_free(null->mctx, null->data);
    null->mctx = NULL;
}

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

    REQUIRE(rdata->type == 10);

    return (ISC_R_SUCCESS);
}

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

    REQUIRE(rdata->type == 10);

    dns_rdata_toregion(rdata, &r);

    return ((digest)(arg, &r));
}

#endif  /* RDATA_GENERIC_NULL_10_C */