a_1.c

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/*
 * Copyright (C) 2005, 2007, 2009, 2014  Internet Systems Consortium, Inc. ("ISC")
 *
 * 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 1.8 2009/12/04 22:06:37 tbox Exp $ */

/* by Bjorn.Victor@it.uu.se, 2005-05-07 */
/* Based on generic/soa_6.c and generic/mx_15.c */

#ifndef RDATA_CH_3_A_1_C
#define RDATA_CH_3_A_1_C

#include <isc/net.h>

#define RRTYPE_A_ATTRIBUTES (0)

static inline isc_result_t
fromtext_ch_a(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_name_t name;
        isc_buffer_t buffer;

        REQUIRE(type == 1);
        REQUIRE(rdclass == dns_rdataclass_ch); /* 3 */

        UNUSED(type);
        UNUSED(callbacks);

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

        /* get domain name */
        dns_name_init(&name, NULL);
        buffer_fromregion(&buffer, &token.value.as_region);
        origin = (origin != NULL) ? origin : dns_rootname;
        RETTOK(dns_name_fromtext(&name, &buffer, origin, options, target));
        if ((options & DNS_RDATA_CHECKNAMES) != 0 &&
            (options & DNS_RDATA_CHECKREVERSE) != 0) {
                isc_boolean_t ok;
                ok = dns_name_ishostname(&name, ISC_FALSE);
                if (!ok && (options & DNS_RDATA_CHECKNAMESFAIL) != 0)
                        RETTOK(DNS_R_BADNAME);
                if (!ok && callbacks != NULL)
                        warn_badname(&name, lexer, callbacks);
        }

        /* 16-bit octal address */
        RETERR(isc_lex_getoctaltoken(lexer, &token, ISC_FALSE));
        if (token.value.as_ulong > 0xffffU)
                RETTOK(ISC_R_RANGE);
        return (uint16_tobuffer(token.value.as_ulong, target));
}

static inline isc_result_t
totext_ch_a(ARGS_TOTEXT) {
        isc_region_t region;
        dns_name_t name;
        dns_name_t prefix;
        isc_boolean_t sub;
        char buf[sizeof("0177777")];
        isc_uint16_t addr;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == dns_rdataclass_ch); /* 3 */
        REQUIRE(rdata->length != 0);

        dns_name_init(&name, NULL);
        dns_name_init(&prefix, NULL);

        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);
        isc_region_consume(&region, name_length(&name));
        addr = uint16_fromregion(&region);

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

        sprintf(buf, "%o", addr); /* note octal */
        RETERR(str_totext(" ", target));
        return (str_totext(buf, target));
}

static inline isc_result_t
fromwire_ch_a(ARGS_FROMWIRE) {
        isc_region_t sregion;
        isc_region_t tregion;
        dns_name_t name;

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

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&name, NULL);

        RETERR(dns_name_fromwire(&name, source, dctx, options, target));

        isc_buffer_activeregion(source, &sregion);
        isc_buffer_availableregion(target, &tregion);
        if (sregion.length < 2)
                return (ISC_R_UNEXPECTEDEND);
        if (tregion.length < 2)
                return (ISC_R_NOSPACE);

        memmove(tregion.base, sregion.base, 2);
        isc_buffer_forward(source, 2);
        isc_buffer_add(target, 2);

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
towire_ch_a(ARGS_TOWIRE) {
        dns_name_t name;
        dns_offsets_t offsets;
        isc_region_t sregion;
        isc_region_t tregion;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == dns_rdataclass_ch);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&name, offsets);

        dns_rdata_toregion(rdata, &sregion);

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

        isc_buffer_availableregion(target, &tregion);
        if (tregion.length < 2)
                return (ISC_R_NOSPACE);

        memmove(tregion.base, sregion.base, 2);
        isc_buffer_add(target, 2);
        return (ISC_R_SUCCESS);
}

static inline int
compare_ch_a(ARGS_COMPARE) {
        dns_name_t name1;
        dns_name_t name2;
        isc_region_t region1;
        isc_region_t region2;
        int order;

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 1);
        REQUIRE(rdata1->rdclass == dns_rdataclass_ch);
        REQUIRE(rdata1->length != 0);
        REQUIRE(rdata2->length != 0);

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

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

        order = memcmp(rdata1->data, rdata2->data, 2);
        if (order != 0)
                order = (order < 0) ? -1 : 1;
        return (order);
}

static inline isc_result_t
fromstruct_ch_a(ARGS_FROMSTRUCT) {
        dns_rdata_ch_a_t *a = source;
        isc_region_t region;

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

        UNUSED(type);
        UNUSED(rdclass);

        dns_name_toregion(&a->ch_addr_dom, &region);
        RETERR(isc_buffer_copyregion(target, &region));

        return (uint16_tobuffer(ntohs(a->ch_addr), target));
}

static inline isc_result_t
tostruct_ch_a(ARGS_TOSTRUCT) {
        dns_rdata_ch_a_t *a = target;
        isc_region_t region;
        dns_name_t name;

        REQUIRE(rdata->type == 1);
        REQUIRE(rdata->rdclass == dns_rdataclass_ch);
        REQUIRE(rdata->length != 0);

        a->common.rdclass = rdata->rdclass;
        a->common.rdtype = rdata->type;
        ISC_LINK_INIT(&a->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(&a->ch_addr_dom, NULL);
        RETERR(name_duporclone(&name, mctx, &a->ch_addr_dom));
        a->ch_addr = htons(uint16_fromregion(&region));
        a->mctx = mctx;
        return (ISC_R_SUCCESS);
}

static inline void
freestruct_ch_a(ARGS_FREESTRUCT) {
        dns_rdata_ch_a_t *a = source;

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

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

        dns_name_free(&a->ch_addr_dom, a->mctx);
        a->mctx = NULL;
}

static inline isc_result_t
additionaldata_ch_a(ARGS_ADDLDATA) {

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

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

        return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_ch_a(ARGS_DIGEST) {
        isc_region_t r;

        dns_name_t name;

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

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

static inline isc_boolean_t
checkowner_ch_a(ARGS_CHECKOWNER) {

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

        UNUSED(type);

        return (dns_name_ishostname(name, wildcard));
}

static inline isc_boolean_t
checknames_ch_a(ARGS_CHECKNAMES) {
        isc_region_t region;
        dns_name_t name;

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

        UNUSED(owner);

        dns_rdata_toregion(rdata, &region);
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &region);
        if (!dns_name_ishostname(&name, ISC_FALSE)) {
                if (bad != NULL)
                        dns_name_clone(&name, bad);
                return (ISC_FALSE);
        }

        return (ISC_TRUE);
}

static inline int
casecompare_ch_a(ARGS_COMPARE) {
        return (compare_ch_a(rdata1, rdata2));
}
#endif  /* RDATA_CH_3_A_1_C */

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