rdata/in_1/srv_33.c

	srv_33.c revision 499b34cea04a46823d003d4c0520c8b03e8513cb
/*
 * Copyright (C) 1999-2001  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 1.32 2001/01/09 21:55:19 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

#define RRTYPE_SRV_ATTRIBUTES (0)

static inline isc_result_t
fromtext_in_srv(ARGS_FROMTEXT) {
    isc_token_t token;
    dns_name_t name;
    isc_buffer_t buffer;

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

    UNUSED(rdclass);

    /*
     * Priority.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (ISC_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Weight.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (ISC_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Port.
     */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffff)
        return (ISC_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /*
     * Target.
     */
    RETERR(isc_lex_getmastertoken(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_in_srv(ARGS_TOTEXT) {
    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);
    REQUIRE(rdata->length != 0);

    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(ARGS_FROMWIRE) {
        dns_name_t name;
    isc_region_t sr;

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

    UNUSED(rdclass);

    dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

        dns_name_init(&name, NULL);

    /*
     * Priority, weight, port.
     */
    isc_buffer_activeregion(source, &sr);
    if (sr.length < 6)
        return (ISC_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(ARGS_TOWIRE) {
    dns_name_t name;
    isc_region_t sr;

    REQUIRE(rdata->type == 33);
    REQUIRE(rdata->length != 0);

    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(ARGS_COMPARE) {
    dns_name_t name1;
    dns_name_t name2;
    isc_region_t region1;
    isc_region_t region2;
    int order;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 33);
    REQUIRE(rdata1->rdclass == 1);
    REQUIRE(rdata1->length != 0);
    REQUIRE(rdata2->length != 0);

    /*
     * Priority, weight, port.
     */
    order = memcmp(rdata1->data, rdata2->data, 6);
    if (order != 0)
        return (order < 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(ARGS_FROMSTRUCT) {
    dns_rdata_in_srv_t *srv = source;
    isc_region_t region;

    REQUIRE(type == 33);
    REQUIRE(rdclass == 1);
    REQUIRE(source != NULL);
    REQUIRE(srv->common.rdtype == type);
    REQUIRE(srv->common.rdclass == rdclass);

    UNUSED(rdclass);

    RETERR(uint16_tobuffer(srv->priority, target));
    RETERR(uint16_tobuffer(srv->weight, target));
    RETERR(uint16_tobuffer(srv->port, target));
    dns_name_toregion(&srv->target, &region);
    return (isc_buffer_copyregion(target, &region));
}

static inline isc_result_t
tostruct_in_srv(ARGS_TOSTRUCT) {
    isc_region_t region;
    dns_rdata_in_srv_t *srv = target;
    dns_name_t name;

    REQUIRE(rdata->rdclass == 1);
    REQUIRE(rdata->type == 33);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

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

    dns_name_init(&name, NULL);
    dns_rdata_toregion(rdata, &region);
    srv->priority = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    srv->weight = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    srv->port = uint16_fromregion(&region);
    isc_region_consume(&region, 2);
    dns_name_fromregion(&name, &region);
    dns_name_init(&srv->target, NULL);
    RETERR(name_duporclone(&name, mctx, &srv->target));
    srv->mctx = mctx;
    return (ISC_R_SUCCESS);
}

static inline void
freestruct_in_srv(ARGS_FREESTRUCT) {
    dns_rdata_in_srv_t *srv = source;

    REQUIRE(source != NULL);
    REQUIRE(srv->common.rdclass == 1);
    REQUIRE(srv->common.rdtype == 33);

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

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

static inline isc_result_t
additionaldata_in_srv(ARGS_ADDLDATA) {
    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(ARGS_DIGEST) {
    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 */