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2319. [bug] Silence Coverity warnings in

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lib/dns/rdata/in_1/apl_42.c. [RT #174]
This commit is contained in:
Mark Andrews
2008-01-22 23:17:31 +00:00
parent a59640bf27
commit e951a79d90
2 changed files with 58 additions and 4 deletions
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3
CHANGES
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@@ -1,3 +1,6 @@
2319. [bug] Silence Coverity warnings in
lib/dns/rdata/in_1/apl_42.c. [RT #174]
2318. [port] ISC_PLATFORM_NEEDTIMESPEC missing from
lib/bind/config.h.in. [RT #17514]

59
lib/dns/rdata/in_1/apl_42.c
View File

@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: apl_42.c,v 1.12 2007/06/19 23:47:17 tbox Exp $ */
/* $Id: apl_42.c,v 1.13 2008/01/22 23:17:31 marka Exp $ */
/* RFC3123 */
@@ -306,37 +306,88 @@ freestruct_in_apl(ARGS_FREESTRUCT) {
isc_result_t
dns_rdata_apl_first(dns_rdata_in_apl_t *apl) {
isc_uint32_t length;
REQUIRE(apl != NULL);
REQUIRE(apl->common.rdtype == 42);
REQUIRE(apl->common.rdclass == 1);
REQUIRE(apl->apl != NULL || apl->apl_len == 0);
/*
* If no APL return ISC_R_NOMORE.
*/
if (apl->apl == NULL)
return (ISC_R_NOMORE);
/*
* Sanity check data.
*/
INSIST(apl->apl_len > 3U);
length = apl->apl[apl->offset + 3] & 0x7f;
INSIST(length <= apl->apl_len);
apl->offset = 0;
return ((apl->apl_len != 0) ? ISC_R_SUCCESS : ISC_R_NOMORE);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_rdata_apl_next(dns_rdata_in_apl_t *apl) {
isc_uint32_t length;
REQUIRE(apl != NULL);
REQUIRE(apl->common.rdtype == 42);
REQUIRE(apl->common.rdclass == 1);
REQUIRE(apl->apl != NULL || apl->apl_len == 0);
if (apl->offset + 3 < apl->apl_len)
/*
* No APL or have already reached the end return ISC_R_NOMORE.
*/
if (apl->apl == NULL || apl->offset == apl->apl_len)
return (ISC_R_NOMORE);
/*
* Sanity check data.
*/
INSIST(apl->offset < apl->apl_len);
INSIST(apl->apl_len > 3U);
INSIST(apl->offset <= apl->apl_len - 4U);
length = apl->apl[apl->offset + 3] & 0x7f;
/*
* 16 to 32 bits promotion as 'length' is 32 bits so there is
* no overflow problems.
*/
INSIST(length + apl->offset <= apl->apl_len);
apl->offset += apl->apl[apl->offset + 3] & 0x7f;
return ((apl->offset >= apl->apl_len) ? ISC_R_SUCCESS : ISC_R_NOMORE);
}
isc_result_t
dns_rdata_apl_current(dns_rdata_in_apl_t *apl, dns_rdata_apl_ent_t *ent) {
isc_uint32_t length;
REQUIRE(apl != NULL);
REQUIRE(apl->common.rdtype == 42);
REQUIRE(apl->common.rdclass == 1);
REQUIRE(ent != NULL);
REQUIRE(apl->apl != NULL || apl->apl_len == 0);
REQUIRE(apl->offset <= apl->apl_len);
if (apl->offset >= apl->apl_len)
if (apl->offset == apl->apl_len)
return (ISC_R_NOMORE);
/*
* Sanity check data.
*/
INSIST(apl->apl_len > 3U);
INSIST(apl->offset <= apl->apl_len - 4U);
length = apl->apl[apl->offset + 3] & 0x7f;
/*
* 16 to 32 bits promotion as 'length' is 32 bits so there is
* no overflow problems.
*/
INSIST(length + apl->offset <= apl->apl_len);
ent->family = (apl->apl[apl->offset] << 8) + apl->apl[apl->offset + 1];
ent->prefix = apl->apl[apl->offset + 2];
ent->length = apl->apl[apl->offset + 3] & 0x7f;