nxt_30.c revision 70e5a7403f0e0a3bd292b8287c5fed5772c15270
/*
* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2003 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: nxt_30.c,v 1.63 2007/06/19 23:47:17 tbox 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
fromtext_nxt(ARGS_FROMTEXT) {
isc_token_t token;
dns_name_t name;
isc_buffer_t buffer;
char *e;
unsigned char bm[8*1024]; /* 64k bits */
dns_rdatatype_t covered;
dns_rdatatype_t maxcovered = 0;
isc_boolean_t first = ISC_TRUE;
long n;
REQUIRE(type == 30);
UNUSED(type);
UNUSED(rdclass);
UNUSED(callbacks);
/*
* Next domain.
*/
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));
memset(bm, 0, sizeof(bm));
do {
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_string, ISC_TRUE));
if (token.type != isc_tokentype_string)
break;
n = strtol(DNS_AS_STR(token), &e, 10);
if (e != DNS_AS_STR(token) && *e == '\0') {
covered = (dns_rdatatype_t)n;
} else if (dns_rdatatype_fromtext(&covered,
&token.value.as_textregion) == DNS_R_UNKNOWN)
RETTOK(DNS_R_UNKNOWN);
/*
* NXT is only specified for types 1..127.
*/
if (covered < 1 || covered > 127)
return (ISC_R_RANGE);
if (first || covered > maxcovered)
maxcovered = covered;
first = ISC_FALSE;
bm[covered/8] |= (0x80>>(covered%8));
} while (1);
isc_lex_ungettoken(lexer, &token);
if (first)
return (ISC_R_SUCCESS);
n = (maxcovered + 8) / 8;
return (mem_tobuffer(target, bm, n));
}
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 == 30);
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")];
sprintf(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 == 30);
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 == 30);
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 int
compare_nxt(ARGS_COMPARE) {
isc_region_t r1;
isc_region_t r2;
dns_name_t name1;
dns_name_t name2;
int order;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == 30);
REQUIRE(rdata1->length != 0);
REQUIRE(rdata2->length != 0);
dns_name_init(&name1, NULL);
dns_name_init(&name2, NULL);
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
dns_name_fromregion(&name1, &r1);
dns_name_fromregion(&name2, &r2);
order = dns_name_rdatacompare(&name1, &name2);
if (order != 0)
return (order);
return (isc_region_compare(&r1, &r2));
}
static inline isc_result_t
fromstruct_nxt(ARGS_FROMSTRUCT) {
dns_rdata_nxt_t *nxt = source;
isc_region_t region;
REQUIRE(type == 30);
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, &region);
RETERR(isc_buffer_copyregion(target, &region));
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 == 30);
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, &region);
dns_name_fromregion(&name, &region);
isc_region_consume(&region, name_length(&name));
dns_name_init(&nxt->next, NULL);
RETERR(name_duporclone(&name, mctx, &nxt->next));
nxt->len = region.length;
nxt->typebits = mem_maybedup(mctx, region.base, region.length);
if (nxt->typebits == NULL)
goto cleanup;
nxt->mctx = mctx;
return (ISC_R_SUCCESS);
cleanup:
if (mctx != NULL)
dns_name_free(&nxt->next, mctx);
return (ISC_R_NOMEMORY);
}
static inline void
freestruct_nxt(ARGS_FREESTRUCT) {
dns_rdata_nxt_t *nxt = source;
REQUIRE(source != NULL);
REQUIRE(nxt->common.rdtype == 30);
if (nxt->mctx == NULL)
return;
dns_name_free(&nxt->next, nxt->mctx);
if (nxt->typebits != NULL)
isc_mem_free(nxt->mctx, nxt->typebits);
nxt->mctx = NULL;
}
static inline isc_result_t
additionaldata_nxt(ARGS_ADDLDATA) {
REQUIRE(rdata->type == 30);
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_nxt(ARGS_DIGEST) {
isc_region_t r;
dns_name_t name;
isc_result_t result;
REQUIRE(rdata->type == 30);
dns_rdata_toregion(rdata, &r);
dns_name_init(&name, NULL);
dns_name_fromregion(&name, &r);
result = dns_name_digest(&name, digest, arg);
if (result != ISC_R_SUCCESS)
return (result);
isc_region_consume(&r, name_length(&name));
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_nxt(ARGS_CHECKOWNER) {
REQUIRE(type == 30);
UNUSED(name);
UNUSED(type);
UNUSED(rdclass);
UNUSED(wildcard);
return (ISC_TRUE);
}
static inline isc_boolean_t
checknames_nxt(ARGS_CHECKNAMES) {
REQUIRE(rdata->type == 30);
UNUSED(rdata);
UNUSED(owner);
UNUSED(bad);
return (ISC_TRUE);
}
#endif /* RDATA_GENERIC_NXT_30_C */