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/*
* 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: nxt_30.c,v 1.6 2020/02/24 17:43:52 florian Exp $ */
/* reviewed: Wed Mar 15 18:21:15 PST 2000 by brister */
/* RFC2535 */
#ifndef RDATA_GENERIC_NXT_30_C
#define RDATA_GENERIC_NXT_30_C
/*
* The attributes do not include DNS_RDATATYPEATTR_SINGLETON
* because we must be able to handle a parent/child NXT pair.
*/
#define RRTYPE_NXT_ATTRIBUTES (0)
static inline isc_result_t
totext_nxt(ARGS_TOTEXT) {
isc_region_t sr;
unsigned int i, j;
dns_name_t name;
dns_name_t prefix;
isc_boolean_t sub;
REQUIRE(rdata->type == dns_rdatatype_nxt);
REQUIRE(rdata->length != 0);
dns_name_init(&name, NULL);
dns_name_init(&prefix, NULL);
dns_rdata_toregion(rdata, &sr);
dns_name_fromregion(&name, &sr);
isc_region_consume(&sr, name_length(&name));
sub = name_prefix(&name, tctx->origin, &prefix);
RETERR(dns_name_totext(&prefix, sub, target));
for (i = 0; i < sr.length; i++) {
if (sr.base[i] != 0)
for (j = 0; j < 8; j++)
if ((sr.base[i] & (0x80 >> j)) != 0) {
dns_rdatatype_t t = i * 8 + j;
RETERR(str_totext(" ", target));
if (dns_rdatatype_isknown(t)) {
RETERR(dns_rdatatype_totext(t,
target));
} else {
char buf[sizeof("65535")];
snprintf(buf, sizeof(buf),
"%u", t);
RETERR(str_totext(buf,
target));
}
}
}
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_nxt(ARGS_FROMWIRE) {
isc_region_t sr;
dns_name_t name;
REQUIRE(type == dns_rdatatype_nxt);
UNUSED(type);
UNUSED(rdclass);
dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
dns_name_init(&name, NULL);
RETERR(dns_name_fromwire(&name, source, dctx, options, target));
isc_buffer_activeregion(source, &sr);
if (sr.length > 0 && (sr.base[0] & 0x80) == 0 &&
((sr.length > 16) || sr.base[sr.length - 1] == 0))
return (DNS_R_BADBITMAP);
RETERR(mem_tobuffer(target, sr.base, sr.length));
isc_buffer_forward(source, sr.length);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
towire_nxt(ARGS_TOWIRE) {
isc_region_t sr;
dns_name_t name;
dns_offsets_t offsets;
REQUIRE(rdata->type == dns_rdatatype_nxt);
REQUIRE(rdata->length != 0);
dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
dns_name_init(&name, offsets);
dns_rdata_toregion(rdata, &sr);
dns_name_fromregion(&name, &sr);
isc_region_consume(&sr, name_length(&name));
RETERR(dns_name_towire(&name, cctx, target));
return (mem_tobuffer(target, sr.base, sr.length));
}
static inline isc_result_t
fromstruct_nxt(ARGS_FROMSTRUCT) {
dns_rdata_nxt_t *nxt = source;
isc_region_t region;
REQUIRE(type == dns_rdatatype_nxt);
REQUIRE(source != NULL);
REQUIRE(nxt->common.rdtype == type);
REQUIRE(nxt->common.rdclass == rdclass);
REQUIRE(nxt->typebits != NULL || nxt->len == 0);
if (nxt->typebits != NULL && (nxt->typebits[0] & 0x80) == 0) {
REQUIRE(nxt->len <= 16);
REQUIRE(nxt->typebits[nxt->len - 1] != 0);
}
UNUSED(type);
UNUSED(rdclass);
dns_name_toregion(&nxt->next, ®ion);
RETERR(isc_buffer_copyregion(target, ®ion));
return (mem_tobuffer(target, nxt->typebits, nxt->len));
}
static inline isc_result_t
tostruct_nxt(ARGS_TOSTRUCT) {
isc_region_t region;
dns_rdata_nxt_t *nxt = target;
dns_name_t name;
REQUIRE(rdata->type == dns_rdatatype_nxt);
REQUIRE(target != NULL);
REQUIRE(rdata->length != 0);
nxt->common.rdclass = rdata->rdclass;
nxt->common.rdtype = rdata->type;
ISC_LINK_INIT(&nxt->common, link);
dns_name_init(&name, NULL);
dns_rdata_toregion(rdata, ®ion);
dns_name_fromregion(&name, ®ion);
isc_region_consume(®ion, name_length(&name));
dns_name_init(&nxt->next, NULL);
RETERR(name_duporclone(&name, &nxt->next));
nxt->len = region.length;
nxt->typebits = mem_maybedup(region.base, region.length);
if (nxt->typebits == NULL)
goto cleanup;
return (ISC_R_SUCCESS);
cleanup:
dns_name_free(&nxt->next);
return (ISC_R_NOMEMORY);
}
#endif /* RDATA_GENERIC_NXT_30_C */
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