a_1.c

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/*
 * Copyright (C) 2004, 2007, 2009, 2014  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2002  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC 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: a_1.c,v 1.55 2009/12/04 22:06:37 tbox Exp $ */

/* Reviewed: Thu Mar 16 16:52:50 PST 2000 by bwelling */

#ifndef RDATA_IN_1_A_1_C
#define RDATA_IN_1_A_1_C

#include <string.h>

#include <isc/net.h>

#define RRTYPE_A_ATTRIBUTES (0)

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

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

        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_in_a(ARGS_TOTEXT) {
        isc_region_t region;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);
        REQUIRE(rdata->length == 4);

        UNUSED(tctx);

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

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

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

        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_in_a(ARGS_TOWIRE) {
        isc_region_t region;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);
        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_in_a(ARGS_COMPARE) {
        isc_region_t r1;
        isc_region_t r2;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 1);
        REQUIRE(rdata1->rdclass == 1);
        REQUIRE(rdata1->length == 4);
        REQUIRE(rdata2->length == 4);

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

static inline isc_result_t
fromstruct_in_a(ARGS_FROMSTRUCT) {
        dns_rdata_in_a_t *a = source;
        isc_uint32_t n;

        REQUIRE(type == 1);
        REQUIRE(rdclass == 1);
        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_in_a(ARGS_TOSTRUCT) {
        dns_rdata_in_a_t *a = target;
        isc_uint32_t n;
        isc_region_t region;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);
        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_in_a(ARGS_FREESTRUCT) {
        dns_rdata_in_a_t *a = source;

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

        UNUSED(a);
}

static inline isc_result_t
additionaldata_in_a(ARGS_ADDLDATA) {
        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_in_a(ARGS_DIGEST) {
        isc_region_t r;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);

        dns_rdata_toregion(rdata, &r);

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

static inline isc_boolean_t
checkowner_in_a(ARGS_CHECKOWNER) {

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

        UNUSED(type);
        UNUSED(rdclass);

        return (dns_name_ishostname(name, wildcard));
}

static inline isc_boolean_t
checknames_in_a(ARGS_CHECKNAMES) {

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == 1);

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

        return (ISC_TRUE);
}

static inline int
casecompare_in_a(ARGS_COMPARE) {
        return (compare_in_a(rdata1, rdata2));
}

#endif  /* RDATA_IN_1_A_1_C */

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