Re: 5.4 perl - missing indices in bulkwalk result

On 05/04/07, Florian Jauernig <[email protected]> wrote:
> > Note that the SNMP perl module does include a flag to control the
> > behaviour when such bogus results are returned:
>
> I already tried this - but unfortunately when creating session objects
> using "new" with the "NonIncreasing" key set to 1, I do not get any errors
> in the session object.

Hmmm....

I've never actually used this flag (and it's a bit difficult to trigger).
But comparing the code in SNMP.xs with the equivalent code in
apps/snmpbulkwalk,  I can see a suspicious difference:

SNMP.xs:
         if (__oid_cmp(vars->name, vars->name_length,
                                   context->reqbase[pix].last_oid,
                                   context->reqbase[pix].last_len) == 0)  {
            if (check) {
               DBPRT(2, (DBOUT "Error: OID not increasing: %s\n",
               // etc
            }
       }

snmpbulkwalk.c:
          if (check && snmp_oid_compare(name, name_length,
                                                vars->name,
                                                vars->name_length) >= 0) {
                            fprintf(stderr, "Error: OID not increasing: ");
                            // etc
           }


The command-line tool picks up on anything other than
strictly increasing OIDs.   The perl module only spots
a repeasted OID (so wouldn't recognise your situation,
where the OID actually goes backwards).


Try tweaking the SNMP.xs code to use the test   "<="  instead of "==",
(since the two OIDs are presented in the opposite order!)
recompile, and re-install.   Does that make any difference?

Dave

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