rdata/generic/csync_62.c

/*
 * Copyright (C) 2015-2017  Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

/* RFC 7477 */

#ifndef RDATA_GENERIC_CSYNC_62_C
#define RDATA_GENERIC_CSYNC_62_C

#define RRTYPE_CSYNC_ATTRIBUTES 0

static inline isc_result_t
fromtext_csync(ARGS_FROMTEXT) {
    isc_token_t token;

    REQUIRE(type == dns_rdatatype_csync);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(origin);
    UNUSED(options);
    UNUSED(callbacks);

    /* Serial. */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    RETERR(uint32_tobuffer(token.value.as_ulong, target));

    /* Flags. */
    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
                      ISC_FALSE));
    if (token.value.as_ulong > 0xffffU)
        RETTOK(ISC_R_RANGE);
    RETERR(uint16_tobuffer(token.value.as_ulong, target));

    /* Type Map */
    return (typemap_fromtext(lexer, target, ISC_TRUE));
}

static inline isc_result_t
totext_csync(ARGS_TOTEXT) {
    unsigned long num;
    char buf[sizeof("0123456789")]; /* Also TYPE65535 */
    isc_region_t sr;

    REQUIRE(rdata->type == dns_rdatatype_csync);
    REQUIRE(rdata->length >= 6);

    UNUSED(tctx);

    dns_rdata_toregion(rdata, &sr);

    num = uint32_fromregion(&sr);
    isc_region_consume(&sr, 4);
    snprintf(buf, sizeof(buf), "%lu", num);
    RETERR(str_totext(buf, target));

    RETERR(str_totext(" ", target));

    num = uint16_fromregion(&sr);
    isc_region_consume(&sr, 2);
    snprintf(buf, sizeof(buf), "%lu", num);
    RETERR(str_totext(buf, target));

    return (typemap_totext(&sr, NULL, target));
}

static /* inline */ isc_result_t
fromwire_csync(ARGS_FROMWIRE) {
    isc_region_t sr;

    REQUIRE(type == dns_rdatatype_csync);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(options);
    UNUSED(dctx);

    /*
     * Serial + Flags
     */
    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);
    isc_region_consume(&sr, 6);

    RETERR(typemap_test(&sr, ISC_TRUE));

    RETERR(mem_tobuffer(target, sr.base, sr.length));
    isc_buffer_forward(source, sr.length);
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_csync(ARGS_TOWIRE) {

    REQUIRE(rdata->type == dns_rdatatype_csync);
    REQUIRE(rdata->length >= 6);

    UNUSED(cctx);

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

static inline int
compare_csync(ARGS_COMPARE) {
    isc_region_t r1;
    isc_region_t r2;

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

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

static inline isc_result_t
fromstruct_csync(ARGS_FROMSTRUCT) {
    dns_rdata_csync_t *csync = source;
    isc_region_t region;

    REQUIRE(type == dns_rdatatype_csync);
    REQUIRE(source != NULL);
    REQUIRE(csync->common.rdtype == type);
    REQUIRE(csync->common.rdclass == rdclass);
    REQUIRE(csync->typebits != NULL || csync->len == 0);

    UNUSED(type);
    UNUSED(rdclass);

    RETERR(uint32_tobuffer(csync->serial, target));
    RETERR(uint16_tobuffer(csync->flags, target));

    region.base = csync->typebits;
    region.length = csync->len;
    RETERR(typemap_test(&region, ISC_TRUE));
    return (mem_tobuffer(target, csync->typebits, csync->len));
}

static inline isc_result_t
tostruct_csync(ARGS_TOSTRUCT) {
    isc_region_t region;
    dns_rdata_csync_t *csync = target;

    REQUIRE(rdata->type == dns_rdatatype_csync);
    REQUIRE(target != NULL);
    REQUIRE(rdata->length != 0);

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

    dns_rdata_toregion(rdata, &region);

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

    csync->flags = uint16_fromregion(&region);
    isc_region_consume(&region, 2);

    csync->len = region.length;
    csync->typebits = mem_maybedup(mctx, region.base, region.length);
    if (csync->typebits == NULL)
        goto cleanup;

    csync->mctx = mctx;
    return (ISC_R_SUCCESS);

 cleanup:
    return (ISC_R_NOMEMORY);
}

static inline void
freestruct_csync(ARGS_FREESTRUCT) {
    dns_rdata_csync_t *csync = source;

    REQUIRE(source != NULL);
    REQUIRE(csync->common.rdtype == dns_rdatatype_csync);

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

    if (csync->typebits != NULL)
        isc_mem_free(csync->mctx, csync->typebits);
    csync->mctx = NULL;
}

static inline isc_result_t
additionaldata_csync(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == dns_rdatatype_csync);

    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_csync(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == dns_rdatatype_csync);

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

static inline isc_boolean_t
checkowner_csync(ARGS_CHECKOWNER) {

       REQUIRE(type == dns_rdatatype_csync);

       UNUSED(name);
       UNUSED(type);
       UNUSED(rdclass);
       UNUSED(wildcard);

       return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_csync(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == dns_rdatatype_csync);

    UNUSED(rdata);
    UNUSED(owner);
    UNUSED(bad);

    return (ISC_TRUE);
}

static inline int
casecompare_csync(ARGS_COMPARE) {
    isc_region_t region1;
    isc_region_t region2;

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

    dns_rdata_toregion(rdata1, &region1);
    dns_rdata_toregion(rdata2, &region2);
    return (isc_region_compare(&region1, &region2));
}
#endif  /* RDATA_GENERIC_CSYNC_62_C */