caa_257.c revision 0c27b3fe77ac1d5094ba3521e8142d9e7973133f
/*
* Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef GENERIC_CAA_257_C
#define GENERIC_CAA_257_C 1
#define RRTYPE_CAA_ATTRIBUTES (0)
static unsigned char const alphanumeric[256] = {
/* 0x00-0x0f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x10-0x1f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x20-0x2f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x30-0x3f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
/* 0x40-0x4f */ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* 0x50-0x5f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
/* 0x60-0x6f */ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
/* 0x70-0x7f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
/* 0x80-0x8f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0x90-0x9f */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xa0-0xaf */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xb0-0xbf */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xc0-0xcf */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xd0-0xdf */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xe0-0xef */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xf0-0xff */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static inline isc_result_t
fromtext_caa(ARGS_FROMTEXT) {
isc_token_t token;
isc_textregion_t tr;
isc_uint8_t flags;
unsigned int i;
REQUIRE(type == dns_rdatatype_caa);
UNUSED(type);
UNUSED(rdclass);
UNUSED(origin);
UNUSED(options);
UNUSED(callbacks);
/* Flags. */
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE));
if (token.value.as_ulong > 255U)
RETTOK(ISC_R_RANGE);
flags = (isc_uint8_t)(token.value.as_ulong & 255U);
RETERR(uint8_tobuffer(flags, target));
/*
* Tag
*/
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
tr = token.value.as_textregion;
for (i = 0; i < tr.length; i++)
if (!alphanumeric[(unsigned char) tr.base[i]])
RETTOK(DNS_R_SYNTAX);
RETERR(uint8_tobuffer(tr.length, target));
RETERR(mem_tobuffer(target, tr.base, tr.length));
/*
* Value
*/
RETERR(isc_lex_getmastertoken(lexer, &token,
isc_tokentype_qstring, ISC_FALSE));
if (token.type != isc_tokentype_qstring &&
token.type != isc_tokentype_string)
RETERR(DNS_R_SYNTAX);
RETERR(multitxt_fromtext(&token.value.as_textregion, target));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
totext_caa(ARGS_TOTEXT) {
isc_region_t region;
isc_uint8_t flags;
char buf[256];
UNUSED(tctx);
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(rdata->length >= 3U);
REQUIRE(rdata->data != NULL);
dns_rdata_toregion(rdata, &region);
/*
* Flags
*/
flags = uint8_consume_fromregion(&region);
sprintf(buf, "%u ", flags);
RETERR(str_totext(buf, target));
/*
* Tag
*/
RETERR(txt_totext(&region, ISC_FALSE, target));
RETERR(str_totext(" ", target));
/*
* Value
*/
RETERR(multitxt_totext(&region, target));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_caa(ARGS_FROMWIRE) {
isc_region_t sr;
unsigned int len, i;
REQUIRE(type == dns_rdatatype_caa);
UNUSED(type);
UNUSED(rdclass);
UNUSED(dctx);
UNUSED(options);
/*
* Flags
*/
isc_buffer_activeregion(source, &sr);
if (sr.length < 2)
return (ISC_R_UNEXPECTEDEND);
/*
* Flags, tag length
*/
RETERR(mem_tobuffer(target, sr.base, 2));
len = sr.base[1];
isc_region_consume(&sr, 2);
isc_buffer_forward(source, 2);
/*
* Zero length tag fields are illegal.
*/
if (sr.length < len || len == 0)
RETERR(DNS_R_FORMERR);
/* Check the Tag's value */
for (i = 0; i < len; i++)
if (!alphanumeric[sr.base[i]])
RETERR(DNS_R_FORMERR);
/*
* Tag + Value
*/
isc_buffer_forward(source, sr.length);
return (mem_tobuffer(target, sr.base, sr.length));
}
static inline isc_result_t
towire_caa(ARGS_TOWIRE) {
isc_region_t region;
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(rdata->length >= 3U);
REQUIRE(rdata->data != NULL);
UNUSED(cctx);
dns_rdata_toregion(rdata, &region);
return (mem_tobuffer(target, region.base, region.length));
}
static inline int
compare_caa(ARGS_COMPARE) {
isc_region_t r1, r2;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == dns_rdatatype_caa);
REQUIRE(rdata1->length >= 3U);
REQUIRE(rdata2->length >= 3U);
REQUIRE(rdata1->data != NULL);
REQUIRE(rdata2->data != NULL);
dns_rdata_toregion(rdata1, &r1);
dns_rdata_toregion(rdata2, &r2);
return (isc_region_compare(&r1, &r2));
}
static inline isc_result_t
fromstruct_caa(ARGS_FROMSTRUCT) {
dns_rdata_caa_t *caa = source;
isc_region_t region;
unsigned int i;
REQUIRE(type == dns_rdatatype_caa);
REQUIRE(source != NULL);
REQUIRE(caa->common.rdtype == type);
REQUIRE(caa->common.rdclass == rdclass);
REQUIRE(caa->tag != NULL && caa->tag_len != 0);
REQUIRE(caa->value != NULL);
UNUSED(type);
UNUSED(rdclass);
/*
* Flags
*/
RETERR(uint8_tobuffer(caa->flags, target));
/*
* Tag length
*/
RETERR(uint8_tobuffer(caa->tag_len, target));
/*
* Tag
*/
region.base = caa->tag;
region.length = caa->tag_len;
for (i = 0; i < region.length; i++)
if (!alphanumeric[region.base[i]])
RETERR(DNS_R_SYNTAX);
RETERR(isc_buffer_copyregion(target, &region));
/*
* Value
*/
region.base = caa->value;
region.length = caa->value_len;
return (isc_buffer_copyregion(target, &region));
}
static inline isc_result_t
tostruct_caa(ARGS_TOSTRUCT) {
dns_rdata_caa_t *caa = target;
isc_region_t sr;
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(target != NULL);
REQUIRE(rdata->length >= 3U);
REQUIRE(rdata->data != NULL);
caa->common.rdclass = rdata->rdclass;
caa->common.rdtype = rdata->type;
ISC_LINK_INIT(&caa->common, link);
dns_rdata_toregion(rdata, &sr);
/*
* Flags
*/
if (sr.length < 1)
return (ISC_R_UNEXPECTEDEND);
caa->flags = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
/*
* Tag length
*/
if (sr.length < 1)
return (ISC_R_UNEXPECTEDEND);
caa->tag_len = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
/*
* Tag
*/
if (sr.length < caa->tag_len)
return (ISC_R_UNEXPECTEDEND);
caa->tag = mem_maybedup(mctx, sr.base, caa->tag_len);
if (caa->tag == NULL)
return (ISC_R_NOMEMORY);
isc_region_consume(&sr, caa->tag_len);
/*
* Value
*/
caa->value_len = sr.length;
caa->value = mem_maybedup(mctx, sr.base, sr.length);
if (caa->value == NULL)
return (ISC_R_NOMEMORY);
caa->mctx = mctx;
return (ISC_R_SUCCESS);
}
static inline void
freestruct_caa(ARGS_FREESTRUCT) {
dns_rdata_caa_t *caa = (dns_rdata_caa_t *) source;
REQUIRE(source != NULL);
REQUIRE(caa->common.rdtype == dns_rdatatype_caa);
if (caa->mctx == NULL)
return;
if (caa->tag != NULL)
isc_mem_free(caa->mctx, caa->tag);
if (caa->value != NULL)
isc_mem_free(caa->mctx, caa->value);
caa->mctx = NULL;
}
static inline isc_result_t
additionaldata_caa(ARGS_ADDLDATA) {
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(rdata->data != NULL);
REQUIRE(rdata->length >= 3U);
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_caa(ARGS_DIGEST) {
isc_region_t r;
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(rdata->data != NULL);
REQUIRE(rdata->length >= 3U);
dns_rdata_toregion(rdata, &r);
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_caa(ARGS_CHECKOWNER) {
REQUIRE(type == dns_rdatatype_caa);
UNUSED(name);
UNUSED(type);
UNUSED(rdclass);
UNUSED(wildcard);
return (ISC_TRUE);
}
static inline isc_boolean_t
checknames_caa(ARGS_CHECKNAMES) {
REQUIRE(rdata->type == dns_rdatatype_caa);
REQUIRE(rdata->data != NULL);
REQUIRE(rdata->length >= 3U);
UNUSED(rdata);
UNUSED(owner);
UNUSED(bad);
return (ISC_TRUE);
}
static inline int
casecompare_caa(ARGS_COMPARE) {
return (compare_caa(rdata1, rdata2));
}
#endif /* GENERIC_CAA_257_C */