rdata/in_1/srv_33.c

	srv_33.c revision 06ec9f45f46306e2da011b23814ed4be8a4abf8e
/*
 * 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: srv_33.c,v 1.15 2000/03/17 21:03:33 bwelling Exp $ */

/* Reviewed: Fri Mar 17 13:01:00 PST 2000 by bwelling */

/* RFC 2782 */

#ifndef RDATA_IN_1_SRV_33_C
#define RDATA_IN_1_SRV_33_C

static inline isc_result_t
fromtext_in_srv(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;

    REQUIRE(type == 33);
    REQUIRE(rdclass == 1);

    /* priority */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /* weight */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /* port */
    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /* target */
    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 inline isc_result_t
totext_in_srv(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;
    char buf[sizeof "64000"];
    unsigned short num;

    REQUIRE(rdata->type == 33);
    REQUIRE(rdata->rdclass == 1);

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

    /* priority */
    dns_rdata_toregion(rdata, &region);
    num = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    sprintf(buf, "%u", num);
    RETERR(str_totext(buf, target));
    RETERR(str_totext(" ", target));

    /* weight */
    num = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    sprintf(buf, "%u", num);
    RETERR(str_totext(buf, target));
    RETERR(str_totext(" ", target));

    /* port */
    num = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    sprintf(buf, "%u", num);
    RETERR(str_totext(buf, target));
    RETERR(str_totext(" ", target));

    /* target */
    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_in_srv(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;
    isc_region_t sr;

    REQUIRE(type == 33);
    REQUIRE(rdclass == 1);

    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);

    /* priority, weight, port */
    isc_buffer_active(source, &sr);
    if (sr.length < 6)
        return (DNS_R_UNEXPECTEDEND);
    RETERR(mem_tobuffer(target, sr.base, 6));
    isc_buffer_forward(source, 6);

    /* target */
    return (dns_name_fromwire(&name, source, dctx, downcase, target));
}

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

    REQUIRE(rdata->type == 33);

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

    /* priority, weight, port */
    dns_rdata_toregion(rdata, &sr);
    RETERR(mem_tobuffer(target, sr.base, 6));
    isc_region_consume(&sr, 6);

    /* target */
    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &sr);
    return (dns_name_towire(&name, cctx, target));
}

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

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 33);
    REQUIRE(rdata1->rdclass == 1);

    /* priority, weight, port */
    result = memcmp(rdata1->data, rdata2->data, 6);
    if (result != 0)
        return (result < 0 ? -1 : 1);

    /* target */
    dns_name_init(&name1, NULL);
    dns_name_init(&name2, NULL);

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

    isc_region_consume(&region1, 6);
    isc_region_consume(&region2, 6);

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

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

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

    REQUIRE(type == 33);
    REQUIRE(rdclass == 1);

    return (DNS_R_NOTIMPLEMENTED);
}

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

    REQUIRE(rdata->type == 33);
    REQUIRE(rdata->rdclass == 1);

    return (DNS_R_NOTIMPLEMENTED);
}

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

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

    REQUIRE(rdata->type == 33);
    REQUIRE(rdata->rdclass == 1);

    dns_name_init(&name, NULL);
    dns_rdata_toregion(rdata, &region);
    isc_region_consume(&region, 6);
    dns_name_fromregion(&name, &region);

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

static inline isc_result_t
digest_in_srv(dns_rdata_t *rdata, dns_digestfunc_t digest, void *arg) {
    isc_region_t r1, r2;
    dns_name_t name;

    REQUIRE(rdata->type == 33);
    REQUIRE(rdata->rdclass == 1);

    dns_rdata_toregion(rdata, &r1);
    r2 = r1;
    isc_region_consume(&r2, 6);
    r1.length = 6;
    RETERR((digest)(arg, &r1));
    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &r2);
    return (dns_name_digest(&name, digest, arg));
}

#endif  /* RDATA_IN_1_SRV_33_C */