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unknown rr type parsing code deuglification.

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This commit is contained in:
Brian Wellington 2000-11-20 21:29:41 +00:00
parent 48b5493b2c
commit 93ed317bb4
1 changed files with 55 additions and 40 deletions
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95
lib/dns/rdata.c
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@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rdata.c,v 1.129 2000/11/20 13:02:18 marka Exp $ */
/* $Id: rdata.c,v 1.130 2000/11/20 21:29:41 bwelling Exp $ */
#include <config.h>
#include <ctype.h>
@ -535,39 +535,68 @@ dns_rdata_towire(dns_rdata_t *rdata, dns_compress_t *cctx,
}
static isc_result_t
rdata_valid(isc_buffer_t *buf, unsigned int len, dns_rdataclass_t rdclass,
dns_rdatatype_t type, isc_mem_t *mctx)
rdata_valid(isc_buffer_t *src, isc_buffer_t *dest, dns_rdataclass_t rdclass,
dns_rdatatype_t type)
{
isc_buffer_t *tbuf = NULL;
isc_buffer_t rdatabuf;
dns_decompress_t dctx;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_region_t r;
isc_result_t result;
dns_decompress_init(&dctx, -1, DNS_DECOMPRESS_NONE);
result = isc_buffer_allocate(mctx, &tbuf, isc_buffer_usedlength(buf));
if (result == ISC_R_SUCCESS) {
isc_buffer_remainingregion(buf, &r);
isc_buffer_init(&rdatabuf, r.base, r.length);
isc_buffer_add(&rdatabuf, r.length);
INSIST(r.length >= len);
isc_buffer_forward(&rdatabuf, r.length - len);
isc_buffer_setactive(&rdatabuf, len);
result = dns_rdata_fromwire(&rdata, rdclass, type, &rdatabuf,
&dctx, ISC_FALSE, tbuf);
isc_buffer_subtract(buf, len);
if (result == ISC_R_SUCCESS) {
isc_buffer_usedregion(tbuf, &r);
(void)isc_buffer_copyregion(buf, &r);
}
isc_buffer_free(&tbuf);
}
isc_buffer_setactive(src, isc_buffer_usedlength(src));
result = dns_rdata_fromwire(&rdata, rdclass, type, src,
&dctx, ISC_FALSE, dest);
dns_decompress_invalidate(&dctx);
return (result);
}
static isc_result_t
unknown_fromtext(dns_rdataclass_t rdclass, dns_rdatatype_t type,
isc_lex_t *lexer, isc_mem_t *mctx, isc_buffer_t *target)
{
isc_result_t result;
isc_buffer_t *buf = NULL;
isc_token_t token;
if (dns_rdatatype_ismeta(type))
return (DNS_R_METATYPE);
result = isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE);
if (result == ISC_R_SUCCESS && token.value.as_ulong > 65535)
return (ISC_R_RANGE);
result = isc_buffer_allocate(mctx, &buf,
isc_buffer_availablelength(target));
if (result != ISC_R_SUCCESS)
return (result);
result = isc_hex_tobuffer(lexer, buf, token.value.as_ulong);
if (result != ISC_R_SUCCESS)
goto failure;
if (isc_buffer_usedlength(buf) != token.value.as_ulong) {
result = ISC_R_UNEXPECTEDEND;
goto failure;
}
if (dns_rdatatype_isknown(type)) {
result = rdata_valid(buf, target, rdclass, type);
} else {
isc_region_t r;
isc_buffer_usedregion(buf, &r);
result = isc_buffer_copyregion(target, &r);
}
if (result != ISC_R_SUCCESS)
goto failure;
isc_buffer_free(&buf);
return (ISC_R_SUCCESS);
failure:
isc_buffer_free(&buf);
return (result);
}
isc_result_t
dns_rdata_fromtext(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
dns_rdatatype_t type, isc_lex_t *lexer,
@ -597,23 +626,9 @@ dns_rdata_fromtext(dns_rdata_t *rdata, dns_rdataclass_t rdclass,
ISC_FALSE);
if (result != ISC_R_SUCCESS)
return (result);
if (strcmp((char *)token.value.as_pointer, "\\#") == 0) {
result = isc_lex_getmastertoken(lexer, &token,
isc_tokentype_number,
ISC_FALSE);
if (result == ISC_R_SUCCESS && token.value.as_ulong > 65535)
result = ISC_R_RANGE;
if (result == ISC_R_SUCCESS)
result = isc_hex_tobuffer(lexer, target,
token.value.as_ulong);
if (result == ISC_R_SUCCESS && dns_rdatatype_ismeta(type))
result = DNS_R_METATYPE;
if (result == ISC_R_SUCCESS && dns_rdatatype_isknown(type)) {
unsigned int len = isc_buffer_usedlength(target) -
isc_buffer_usedlength(&st);
result = rdata_valid(target, len, rdclass, type, mctx);
}
} else {
if (strcmp((char *)token.value.as_pointer, "\\#") == 0)
result = unknown_fromtext(rdclass, type, lexer, mctx, target);
else {
isc_lex_ungettoken(lexer, &token);
FROMTEXTSWITCH