rdata/generic/talink_58.c

/*
 * Copyright (C) 2015, 2016  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/.
 */

#ifndef RDATA_GENERIC_TALINK_58_C
#define RDATA_GENERIC_TALINK_58_C

#define RRTYPE_TALINK_ATTRIBUTES 0

static inline isc_result_t
fromtext_talink(ARGS_FROMTEXT) {
    isc_token_t token;
    dns_name_t name;
    isc_buffer_t buffer;
    int i;

    REQUIRE(type == dns_rdatatype_talink);

    UNUSED(type);
    UNUSED(rdclass);
    UNUSED(callbacks);

    if (origin == NULL)
        origin = dns_rootname;

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

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
totext_talink(ARGS_TOTEXT) {
    isc_region_t dregion;
    dns_name_t prev;
    dns_name_t next;
    dns_name_t prefix;
    isc_boolean_t sub;

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

    dns_name_init(&prev, NULL);
    dns_name_init(&next, NULL);
    dns_name_init(&prefix, NULL);

    dns_rdata_toregion(rdata, &dregion);

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

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

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

    RETERR(str_totext(" ", target));

    sub = name_prefix(&next, tctx->origin, &prefix);
    return(dns_name_totext(&prefix, sub, target));
}

static inline isc_result_t
fromwire_talink(ARGS_FROMWIRE) {
    dns_name_t prev;
    dns_name_t next;

    REQUIRE(type == dns_rdatatype_talink);

    UNUSED(type);
    UNUSED(rdclass);

    dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);

    dns_name_init(&prev, NULL);
    dns_name_init(&next, NULL);

    RETERR(dns_name_fromwire(&prev, source, dctx, options, target));
    return(dns_name_fromwire(&next, source, dctx, options, target));
}

static inline isc_result_t
towire_talink(ARGS_TOWIRE) {
    isc_region_t sregion;
    dns_name_t prev;
    dns_name_t next;
    dns_offsets_t moffsets;
    dns_offsets_t roffsets;

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

    dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);

    dns_name_init(&prev, moffsets);
    dns_name_init(&next, roffsets);

    dns_rdata_toregion(rdata, &sregion);

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

    dns_name_fromregion(&next, &sregion);
    isc_region_consume(&sregion, name_length(&next));
    return(dns_name_towire(&next, cctx, target));
}

static inline int
compare_talink(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_talink);
    REQUIRE(rdata1->length != 0);
    REQUIRE(rdata2->length != 0);

    dns_rdata_toregion(rdata1, &region1);
    dns_rdata_toregion(rdata2, &region2);
    return (isc_region_compare(&region1, &region2));
}

static inline isc_result_t
fromstruct_talink(ARGS_FROMSTRUCT) {
    dns_rdata_talink_t *talink = source;
    isc_region_t region;

    REQUIRE(type == dns_rdatatype_talink);
    REQUIRE(source != NULL);
    REQUIRE(talink->common.rdtype == type);
    REQUIRE(talink->common.rdclass == rdclass);

    UNUSED(type);
    UNUSED(rdclass);

    dns_name_toregion(&talink->prev, &region);
    RETERR(isc_buffer_copyregion(target, &region));
    dns_name_toregion(&talink->next, &region);
    return(isc_buffer_copyregion(target, &region));
}

static inline isc_result_t
tostruct_talink(ARGS_TOSTRUCT) {
    isc_region_t region;
    dns_rdata_talink_t *talink = target;
    dns_name_t name;
    isc_result_t result;

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

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

    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(&talink->prev, NULL);
    RETERR(name_duporclone(&name, mctx, &talink->prev));

    dns_name_fromregion(&name, &region);
    isc_region_consume(&region, name_length(&name));
    dns_name_init(&talink->next, NULL);
    result = name_duporclone(&name, mctx, &talink->next);
    if (result != ISC_R_SUCCESS)
        goto cleanup;

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

 cleanup:
    if (mctx != NULL)
        dns_name_free(&talink->prev, mctx);
    return (ISC_R_NOMEMORY);
}

static inline void
freestruct_talink(ARGS_FREESTRUCT) {
    dns_rdata_talink_t *talink = source;

    REQUIRE(source != NULL);
    REQUIRE(talink->common.rdtype == dns_rdatatype_talink);

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

    dns_name_free(&talink->prev, talink->mctx);
    dns_name_free(&talink->next, talink->mctx);
    talink->mctx = NULL;
}

static inline isc_result_t
additionaldata_talink(ARGS_ADDLDATA) {
    UNUSED(rdata);
    UNUSED(add);
    UNUSED(arg);

    REQUIRE(rdata->type == dns_rdatatype_talink);

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_talink(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == dns_rdatatype_talink);

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

static inline isc_boolean_t
checkowner_talink(ARGS_CHECKOWNER) {

    REQUIRE(type == dns_rdatatype_talink);

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

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_talink(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == dns_rdatatype_talink);

    UNUSED(bad);
    UNUSED(owner);

    return (ISC_TRUE);
}

static inline int
casecompare_talink(ARGS_COMPARE) {
    return (compare_talink(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_TALINK_58_C */