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1109. [bug] nsupdate accepted illegal ttl values.

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e.g. "update add foo -0 IN A 1.2.3.4"
simlified ttl range processing by using unsigned long.
This commit is contained in:
Mark Andrews
2001-11-07 04:44:09 +00:00
parent a89d1aea0c
commit 3842a051ba
2 changed files with 8 additions and 15 deletions
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2
CHANGES
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@@ -1,3 +1,5 @@
1109. [bug] nsupdate accepted illegal ttl values.
1108. [bug] On Win32 rndc was hanging when named was not running.
Fix to look for exceptions in the socket.c select
code to catch and report the errors. Miscellaneous

21
bin/nsupdate/nsupdate.c
View File

@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: nsupdate.c,v 1.111 2001/11/06 20:21:42 gson Exp $ */
/* $Id: nsupdate.c,v 1.112 2001/11/07 04:44:09 marka Exp $ */
#include <config.h>
@@ -1101,7 +1101,7 @@ static isc_uint16_t
update_addordelete(char *cmdline, isc_boolean_t isdelete) {
isc_result_t result;
dns_name_t *name = NULL;
long ttl;
unsigned long ttl;
char *word;
dns_rdataclass_t rdataclass;
dns_rdatatype_t rdatatype;
@@ -1147,29 +1147,20 @@ update_addordelete(char *cmdline, isc_boolean_t isdelete) {
goto doneparsing;
}
}
errno = 0;
ttl = strtol(word, &endp, 0);
if (*endp != '\0') {
ttl = strtoul(word, &endp, 0);
if (!isdigit((unsigned char)*word) || *endp != '\0') {
if (isdelete) {
ttl = 0;
goto parseclass;
} else {
fprintf(stderr, "ttl '%s' is not numeric\n", word);
fprintf(stderr, "ttl '%s' is not legal\n", word);
goto failure;
}
}
if (isdelete)
ttl = 0;
else if (ttl < 0 || ttl > TTL_MAX ||
(ttl == LONG_MAX && errno == ERANGE))
{
/*
* The errno test is needed to catch when strtol()
* overflows on a platform where sizeof(int) ==
* sizeof(long), because ttl will be set to LONG_MAX,
* which will be equal to TTL_MAX.
*/
else if (ttl > TTL_MAX) {
fprintf(stderr, "ttl '%s' is out of range (0 to %d)\n",
word, TTL_MAX);
goto failure;