On Mon, Jul 13, 2015 at 10:27 AM, Turbo Fredriksson <tu...@bayour.com>
wrote:
> On Jul 10, 2015, at 11:30 PM, Bill Fenner wrote:
>
> Can you try this patch?
>
> --- a/agent/mibgroup/ucd-snmp/pass_common.c+++
> b/agent/mibgroup/ucd-snmp/pass_common.c
> @@ -135,7 +135,7 @@ netsnmp_internal_pass_parse(char * buf,
> c64.high = (unsigned long)(v64 >> 32);
> c64.low = (unsigned long)(v64 & 0xffffffff);
> *var_len = sizeof(c64);- vp->type = ASN_INTEGER64;+
> vp->type = ASN_OPAQUE_I64;
> return ((unsigned char *) &c64);
> }
> #endif
>
> The user that reported the int64 issue on my agent pointed
> out to me that this patch isn't quite right. And not complete…
>
> Since it's checking for a "integer64" in that code, it should
> return a "signed char *", no?
>
No. As with much code that started as pre-ANSI, net-snmp uses (unsigned
char *) to stand in for (void *).
> And since that and "unsigned" exists, it seems reasonable that
> the code should/could return a "unsigned64" as well...
>
> How about the enclosed patch? Tested with the enclosed
> test script (a modification on the one I found at an earlier
> message - see previous mail in thread):
>
> $ snmpget -uro -v2c -cpublic localhost .1.3.6.1.4.1.22222.42.2.0
> SNMPv2-SMI::enterprises.22222.42.2.0 = Opaque: Int64: 9223372036854775806
> $ snmpget -uro -v2c -cpublic localhost .1.3.6.1.4.1.22222.42.5.0
> SNMPv2-SMI::enterprises.22222.42.5.0 = Gauge32: 4294967294
> $ snmpget -uro -v2c -cpublic localhost .1.3.6.1.4.1.22222.42.6.0
> SNMPv2-SMI::enterprises.22222.42.6.0 = Opaque: UInt64: 18446744073709551614
>
> Although I'm not sure "Gauge32" is correct, but considering that
> it returns the correct value...
>
SMI defines "Unsigned32" and "Gauge32" identically, so without a MIB loaded
to distinguish, the command-line tool just reports Gauge32 since it has no
way to know.
Bill
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