rdata/generic/soa_6.c

	soa_6.c revision 90f9d00f087ddb4442d1ebf628c1bcaff18226a0
/*
 * 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: soa_6.c,v 1.34 2000/04/27 23:57:56 gson Exp $ */

/* Reviewed: Thu Mar 16 15:18:32 PST 2000 by explorer */

#ifndef RDATA_GENERIC_SOA_6_C
#define RDATA_GENERIC_SOA_6_C

#define RRTYPE_SOA_ATTRIBUTES (DNS_RDATATYPEATTR_SINGLETON)

static inline isc_result_t
fromtext_soa(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;
    int i;
    isc_uint32_t n;

    UNUSED(rdclass);

    REQUIRE(type == 6);

    origin = (origin != NULL) ? origin : dns_rootname;

    for (i = 0 ; i < 2 ; i++) {
        RETERR(gettoken(lexer, &token, isc_tokentype_string,
                ISC_FALSE));

        dns_name_init(&name, NULL);
        buffer_fromregion(&buffer, &token.value.as_region);
        RETERR(dns_name_fromtext(&name, &buffer, origin,
                     downcase, target));
    }

    RETERR(gettoken(lexer, &token, isc_tokentype_number, ISC_FALSE));
    RETERR(uint32_tobuffer(token.value.as_ulong, target));

    for (i = 0; i < 4; i++) {
        RETERR(gettoken(lexer, &token, isc_tokentype_string,
                ISC_FALSE));
        RETERR(dns_counter_fromtext(&token.value.as_textregion, &n));
        RETERR(uint32_tobuffer(n, target));
    }

    return (ISC_R_SUCCESS);
}

static char *soa_fieldnames[5] = {
    "serial", "refresh", "retry", "expire", "minimum"
};

static inline isc_result_t
totext_soa(dns_rdata_t *rdata, dns_rdata_textctx_t *tctx,
       isc_buffer_t *target)
{
    isc_region_t dregion;
    dns_name_t mname;
    dns_name_t rname;
    dns_name_t prefix;
    isc_boolean_t sub;
    int i;

    REQUIRE(rdata->type == 6);

    dns_name_init(&mname, NULL);
    dns_name_init(&rname, NULL);
    dns_name_init(&prefix, NULL);

    dns_rdata_toregion(rdata, &dregion);

    dns_name_fromregion(&mname, &dregion);
    isc_region_consume(&dregion, name_length(&mname));

    dns_name_fromregion(&rname, &dregion);
    isc_region_consume(&dregion, name_length(&rname));

    sub = name_prefix(&mname, tctx->origin, &prefix);
    RETERR(dns_name_totext(&prefix, sub, target));

    RETERR(str_totext(" ", target));

    sub = name_prefix(&rname, tctx->origin, &prefix);
    RETERR(dns_name_totext(&prefix, sub, target));

    RETERR(str_totext(" (" , target));
    RETERR(str_totext(tctx->linebreak, target));

    for (i = 0; i < 5 ; i++) {
        char buf[sizeof "2147483647"];
        unsigned long num;
        unsigned int numlen;
        num = uint32_fromregion(&dregion);
        isc_region_consume(&dregion, 4);
        numlen = sprintf(buf, "%lu", num);
        INSIST(numlen > 0 && numlen < sizeof "2147483647");
        RETERR(str_totext(buf, target));
        if ((tctx->flags & (DNS_STYLEFLAG_MULTILINE |
                    DNS_STYLEFLAG_COMMENT)) ==
                   (DNS_STYLEFLAG_MULTILINE |
                    DNS_STYLEFLAG_COMMENT)) {
            RETERR(str_totext("           ; " + numlen, target));
            RETERR(str_totext(soa_fieldnames[i], target));
            /* Print times in week/day/hour/minute/second form */
            if (i >= 1) {
                RETERR(str_totext(" (", target));
                RETERR(dns_ttl_totext(num, ISC_TRUE, target));
                RETERR(str_totext(")", target));
            }
            RETERR(str_totext(tctx->linebreak, target));
        } else {
            RETERR(str_totext(" ", target));
        }
    }

    RETERR(str_totext(")", target));

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_soa(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 mname;
        dns_name_t rname;
    isc_region_t sregion;
    isc_region_t tregion;

    UNUSED(rdclass);

    REQUIRE(type == 6);

    if (dns_decompress_edns(dctx) >= 1 || !dns_decompress_strict(dctx))
        dns_decompress_setmethods(dctx, DNS_COMPRESS_ALL);
    else
        dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&mname, NULL);
        dns_name_init(&rname, NULL);

        RETERR(dns_name_fromwire(&mname, source, dctx, downcase, target));
        RETERR(dns_name_fromwire(&rname, source, dctx, downcase, target));

    isc_buffer_activeregion(source, &sregion);
    isc_buffer_availableregion(target, &tregion);

    if (sregion.length < 20)
        return (ISC_R_UNEXPECTEDEND);
    if (tregion.length < 20)
        return (ISC_R_NOSPACE);

    memcpy(tregion.base, sregion.base, 20);
    isc_buffer_forward(source, 20);
    isc_buffer_add(target, 20);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_soa(dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target)
{
    isc_region_t sregion;
    isc_region_t tregion;
    dns_name_t mname;
    dns_name_t rname;

    REQUIRE(rdata->type == 6);

    if (dns_compress_getedns(cctx) >= 1)
        dns_compress_setmethods(cctx, DNS_COMPRESS_ALL);
    else
        dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

    dns_name_init(&mname, NULL);
    dns_name_init(&rname, NULL);

    dns_rdata_toregion(rdata, &sregion);

    dns_name_fromregion(&mname, &sregion);
    isc_region_consume(&sregion, name_length(&mname));
    RETERR(dns_name_towire(&mname, cctx, target));

    dns_name_fromregion(&rname, &sregion);
    isc_region_consume(&sregion, name_length(&rname));
    RETERR(dns_name_towire(&rname, cctx, target));

    isc_buffer_availableregion(target, &tregion);
    if (tregion.length < 20)
        return (ISC_R_NOSPACE);

    memcpy(tregion.base, sregion.base, 20);
    isc_buffer_add(target, 20);
    return (ISC_R_SUCCESS);
}

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

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == 6);

    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);

    order = dns_name_rdatacompare(&name1, &name2);
    if (order != 0)
        return (order);

    isc_region_consume(&region1, name_length(&name1));
    isc_region_consume(&region2, name_length(&name2));

    dns_name_init(&name1, NULL);
    dns_name_init(&name2, NULL);

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

    order = dns_name_rdatacompare(&name1, &name2);
    if (order != 0)
        return (order);

    isc_region_consume(&region1, name_length(&name1));
    isc_region_consume(&region2, name_length(&name2));

    return (compare_region(&region1, &region2));
}

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

    REQUIRE(type == 6);

    return (ISC_R_NOTIMPLEMENTED);
}

static inline isc_result_t
tostruct_soa(dns_rdata_t *rdata, void *target, isc_mem_t *mctx)
{
    isc_region_t region;
    dns_rdata_soa_t *soa = target;
    dns_name_t name;

    REQUIRE(rdata->type == 6);
    REQUIRE(target != NULL);

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

    soa->mctx = mctx;

    dns_rdata_toregion(rdata, &region);

    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &region);
    isc_region_consume(&region, name_length(&name));
    dns_name_init(&soa->origin, NULL);
    RETERR(dns_name_dup(&name, soa->mctx, &soa->origin));

    dns_name_fromregion(&name, &region);
    isc_region_consume(&region, name_length(&name));
    dns_name_init(&soa->mname, NULL);
    RETERR(dns_name_dup(&name, soa->mctx, &soa->mname));

    soa->serial = uint32_fromregion(&region);
    isc_region_consume(&region, 4);

    soa->refresh = uint32_fromregion(&region);
    isc_region_consume(&region, 4);

    soa->retry = uint32_fromregion(&region);
    isc_region_consume(&region, 4);

    soa->expire = uint32_fromregion(&region);
    isc_region_consume(&region, 4);

    soa->minimum = uint32_fromregion(&region);

    return (ISC_R_SUCCESS);
}

static inline void
freestruct_soa(void *source)
{
    dns_rdata_soa_t *soa = source;

    REQUIRE(source != NULL);
    REQUIRE(soa->common.rdtype == 6);

    dns_name_free(&soa->origin, soa->mctx);
    dns_name_free(&soa->mname, soa->mctx);
    soa->mctx = NULL;
}

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

    REQUIRE(rdata->type == 6);

    return (ISC_R_SUCCESS);
}

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

    REQUIRE(rdata->type == 6);

    dns_rdata_toregion(rdata, &r);

    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &r);
    RETERR(dns_name_digest(&name, digest, arg));
    isc_region_consume(&r, name_length(&name));

    dns_name_init(&name, NULL);
    dns_name_fromregion(&name, &r);
    RETERR(dns_name_digest(&name, digest, arg));
    isc_region_consume(&r, name_length(&name));

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

#endif  /* RDATA_GENERIC_SOA_6_C */