/*
 * Copyright (C) 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: cname_5.c,v 1.9 2020/09/14 08:40:43 florian Exp $ */

/* reviewed: Wed Mar 15 16:48:45 PST 2000 by brister */

#ifndef RDATA_GENERIC_CNAME_5_C
#define RDATA_GENERIC_CNAME_5_C

static inline isc_result_t
totext_cname(ARGS_TOTEXT) {
        isc_region_t region;
        dns_name_t name;
        dns_name_t prefix;
        int sub;

        REQUIRE(rdata->type == dns_rdatatype_cname);
        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_cname(ARGS_FROMWIRE) {
        dns_name_t name;

        REQUIRE(type == dns_rdatatype_cname);

        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_cname(ARGS_TOWIRE) {
        dns_name_t name;
        dns_offsets_t offsets;
        isc_region_t region;

        REQUIRE(rdata->type == dns_rdatatype_cname);
        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 isc_result_t
tostruct_cname(ARGS_TOSTRUCT) {
        isc_region_t region;
        dns_rdata_cname_t *cname = target;
        dns_name_t name;

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

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

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

static inline void
freestruct_cname(ARGS_FREESTRUCT) {
        dns_rdata_cname_t *cname = source;

        REQUIRE(source != NULL);

        dns_name_free(&cname->cname);
}

#endif  /* RDATA_GENERIC_CNAME_5_C */