ns_2.c

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/*
 * Copyright (C) 2004, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1998-2001  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: ns_2.c,v 1.48 2009/12/04 22:06:37 tbox Exp $ */

/* Reviewed: Wed Mar 15 18:15:00 PST 2000 by bwelling */

#ifndef RDATA_GENERIC_NS_2_C
#define RDATA_GENERIC_NS_2_C

#define RRTYPE_NS_ATTRIBUTES (DNS_RDATATYPEATTR_ZONECUTAUTH)

static inline isc_result_t
fromtext_ns(ARGS_FROMTEXT) {
        isc_token_t token;
        dns_name_t name;
        isc_buffer_t buffer;
        isc_boolean_t ok;

        REQUIRE(type == 2);

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

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

        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));
        ok = ISC_TRUE;
        if ((options & DNS_RDATA_CHECKNAMES) != 0)
                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);
        return (ISC_R_SUCCESS);
}

static inline isc_result_t
totext_ns(ARGS_TOTEXT) {
        isc_region_t region;
        dns_name_t name;
        dns_name_t prefix;
        isc_boolean_t sub;

        REQUIRE(rdata->type == 2);
        REQUIRE(rdata->length != 0);

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

        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);

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

        return (dns_name_totext(&prefix, sub, target));
}

static inline isc_result_t
fromwire_ns(ARGS_FROMWIRE) {
        dns_name_t name;

        REQUIRE(type == 2);

        UNUSED(type);
        UNUSED(rdclass);

        dns_decompress_setmethods(dctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&name, NULL);
        return (dns_name_fromwire(&name, source, dctx, options, target));
}

static inline isc_result_t
towire_ns(ARGS_TOWIRE) {
        dns_name_t name;
        dns_offsets_t offsets;
        isc_region_t region;

        REQUIRE(rdata->type == 2);
        REQUIRE(rdata->length != 0);

        dns_compress_setmethods(cctx, DNS_COMPRESS_GLOBAL14);

        dns_name_init(&name, offsets);
        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);

        return (dns_name_towire(&name, cctx, target));
}

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

        REQUIRE(rdata1->type == rdata2->type);
        REQUIRE(rdata1->rdclass == rdata2->rdclass);
        REQUIRE(rdata1->type == 2);
        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);

        return (dns_name_rdatacompare(&name1, &name2));
}

static inline isc_result_t
fromstruct_ns(ARGS_FROMSTRUCT) {
        dns_rdata_ns_t *ns = source;
        isc_region_t region;

        REQUIRE(type == 2);
        REQUIRE(source != NULL);
        REQUIRE(ns->common.rdtype == type);
        REQUIRE(ns->common.rdclass == rdclass);

        UNUSED(type);
        UNUSED(rdclass);

        dns_name_toregion(&ns->name, &region);
        return (isc_buffer_copyregion(target, &region));
}

static inline isc_result_t
tostruct_ns(ARGS_TOSTRUCT) {
        isc_region_t region;
        dns_rdata_ns_t *ns = target;
        dns_name_t name;

        REQUIRE(rdata->type == 2);
        REQUIRE(target != NULL);
        REQUIRE(rdata->length != 0);

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

        dns_name_init(&name, NULL);
        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);
        dns_name_init(&ns->name, NULL);
        RETERR(name_duporclone(&name, mctx, &ns->name));
        ns->mctx = mctx;
        return (ISC_R_SUCCESS);
}

static inline void
freestruct_ns(ARGS_FREESTRUCT) {
        dns_rdata_ns_t *ns = source;

        REQUIRE(source != NULL);

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

        dns_name_free(&ns->name, ns->mctx);
        ns->mctx = NULL;
}

static inline isc_result_t
additionaldata_ns(ARGS_ADDLDATA) {
        dns_name_t name;
        dns_offsets_t offsets;
        isc_region_t region;

        REQUIRE(rdata->type == 2);

        dns_name_init(&name, offsets);
        dns_rdata_toregion(rdata, &region);
        dns_name_fromregion(&name, &region);

        return ((add)(arg, &name, dns_rdatatype_a));
}

static inline isc_result_t
digest_ns(ARGS_DIGEST) {
        isc_region_t r;
        dns_name_t name;

        REQUIRE(rdata->type == 2);

        dns_rdata_toregion(rdata, &r);
        dns_name_init(&name, NULL);
        dns_name_fromregion(&name, &r);

        return (dns_name_digest(&name, digest, arg));
}

static inline isc_boolean_t
checkowner_ns(ARGS_CHECKOWNER) {

        REQUIRE(type == 2);

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

        return (ISC_TRUE);
}

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

        REQUIRE(rdata->type == 2);

        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_ns(ARGS_COMPARE) {
        return (compare_ns(rdata1, rdata2));
}

#endif  /* RDATA_GENERIC_NS_2_C */

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