rdata/hs_4/a_1.c

/*
 * Copyright (C) 1999-2002, 2004, 2007, 2009, 2014-2016  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/.
 */

/* $Id: a_1.c,v 1.33 2009/12/04 22:06:37 tbox Exp $ */

/* reviewed: Thu Mar 16 15:58:36 PST 2000 by brister */

#ifndef RDATA_HS_4_A_1_C
#define RDATA_HS_4_A_1_C

#include <isc/net.h>

#define RRTYPE_A_ATTRIBUTES (0)

static inline isc_result_t
fromtext_hs_a(ARGS_FROMTEXT) {
    isc_token_t token;
    struct in_addr addr;
    isc_region_t region;

    REQUIRE(type == dns_rdatatype_a);
    REQUIRE(rdclass == dns_rdataclass_hs);

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

    RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
                      ISC_FALSE));

    if (getquad(DNS_AS_STR(token), &addr, lexer, callbacks) != 1)
        RETTOK(DNS_R_BADDOTTEDQUAD);
    isc_buffer_availableregion(target, &region);
    if (region.length < 4)
        return (ISC_R_NOSPACE);
    memmove(region.base, &addr, 4);
    isc_buffer_add(target, 4);
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
totext_hs_a(ARGS_TOTEXT) {
    isc_region_t region;

    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);
    REQUIRE(rdata->length == 4);

    UNUSED(tctx);

    dns_rdata_toregion(rdata, &region);
    return (inet_totext(AF_INET, &region, target));
}

static inline isc_result_t
fromwire_hs_a(ARGS_FROMWIRE) {
    isc_region_t sregion;
    isc_region_t tregion;

    REQUIRE(type == dns_rdatatype_a);
    REQUIRE(rdclass == dns_rdataclass_hs);

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

    isc_buffer_activeregion(source, &sregion);
    isc_buffer_availableregion(target, &tregion);
    if (sregion.length < 4)
        return (ISC_R_UNEXPECTEDEND);
    if (tregion.length < 4)
        return (ISC_R_NOSPACE);

    memmove(tregion.base, sregion.base, 4);
    isc_buffer_forward(source, 4);
    isc_buffer_add(target, 4);
    return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_hs_a(ARGS_TOWIRE) {
    isc_region_t region;

    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);
    REQUIRE(rdata->length == 4);

    UNUSED(cctx);

    isc_buffer_availableregion(target, &region);
    if (region.length < rdata->length)
        return (ISC_R_NOSPACE);
    memmove(region.base, rdata->data, rdata->length);
    isc_buffer_add(target, 4);
    return (ISC_R_SUCCESS);
}

static inline int
compare_hs_a(ARGS_COMPARE) {
    int order;

    REQUIRE(rdata1->type == rdata2->type);
    REQUIRE(rdata1->rdclass == rdata2->rdclass);
    REQUIRE(rdata1->type == dns_rdatatype_a);
    REQUIRE(rdata1->rdclass == dns_rdataclass_hs);
    REQUIRE(rdata1->length == 4);
    REQUIRE(rdata2->length == 4);

    order = memcmp(rdata1->data, rdata2->data, 4);
    if (order != 0)
        order = (order < 0) ? -1 : 1;

    return (order);
}

static inline isc_result_t
fromstruct_hs_a(ARGS_FROMSTRUCT) {
    dns_rdata_hs_a_t *a = source;
    isc_uint32_t n;

    REQUIRE(type == dns_rdatatype_a);
    REQUIRE(rdclass == dns_rdataclass_hs);
    REQUIRE(source != NULL);
    REQUIRE(a->common.rdtype == type);
    REQUIRE(a->common.rdclass == rdclass);

    UNUSED(type);
    UNUSED(rdclass);

    n = ntohl(a->in_addr.s_addr);

    return (uint32_tobuffer(n, target));
}

static inline isc_result_t
tostruct_hs_a(ARGS_TOSTRUCT) {
    dns_rdata_hs_a_t *a = target;
    isc_uint32_t n;
    isc_region_t region;

    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);
    REQUIRE(rdata->length == 4);

    UNUSED(mctx);

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

    dns_rdata_toregion(rdata, &region);
    n = uint32_fromregion(&region);
    a->in_addr.s_addr = htonl(n);

    return (ISC_R_SUCCESS);
}

static inline void
freestruct_hs_a(ARGS_FREESTRUCT) {
    UNUSED(source);

    REQUIRE(source != NULL);
}

static inline isc_result_t
additionaldata_hs_a(ARGS_ADDLDATA) {
    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);

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

    return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_hs_a(ARGS_DIGEST) {
    isc_region_t r;

    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);

    dns_rdata_toregion(rdata, &r);

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

static inline isc_boolean_t
checkowner_hs_a(ARGS_CHECKOWNER) {

    REQUIRE(type == dns_rdatatype_a);
    REQUIRE(rdclass == dns_rdataclass_hs);

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

    return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_hs_a(ARGS_CHECKNAMES) {

    REQUIRE(rdata->type == dns_rdatatype_a);
    REQUIRE(rdata->rdclass == dns_rdataclass_hs);

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

    return (ISC_TRUE);
}

static inline int
casecompare_hs_a(ARGS_COMPARE) {
    return (compare_hs_a(rdata1, rdata2));
}

#endif  /* RDATA_HS_4_A_1_C */