[AGENT++] snmp++ request and response mismatch

[Jochen Katz]

Hi,

for SNMPv2 such message mismatch should only occur if a request id is
used twice, but this should be avoided by a mutex.

Which proxy functionality do you use? I assume that you did define _SNMPv3.

If you see an invalid response, do you get a timeout for another request?

Is it possible to reproduce this with logging enabled and all log levels
set to 15 for both client and proxy? For the client, please log the
request id of the pdu after each call to Snmp::get/next...

Regards,
  Jochen


Am 25.08.2010 11:29, schrieb Wang Fang:
> I am using snmp++v3.2.24.tar.gz, agent++v3.5.30.tar.tar, crypt-1.17.tar.bz2,
> libdes-l-4.01a.tar.gz, SNMPv2.
> The requst:
> requst id:1061
> 1.3.6.1.4.1.2863.1.1.1.10.1.0
> 1.3.6.1.4.1.2863.1.1.1.10.2.0
> 1.3.6.1.4.1.2863.1.1.1.10.4.0
> 1.3.6.1.4.1.2863.1.1.1.100.1.0
> 
> The response:
> request id:1061
> 1.3.6.1.4.1.2863.1.1.1.11.1.0
> 1.3.6.1.4.1.2863.1.1.1.11.2.0
> 1.3.6.1.4.1.2863.1.1.1.11.3.0
> 1.3.6.1.4.1.2863.1.1.1.11.5.0
> 
> There is only one callback function, and the request oids is passed to
> callback through the last parameter. The proxy is running in Ubuntu and it's
> written with snmp++v3.2.24.tar.gz, agent++v3.5.30.tar.tar. The proxy works
> fine with serial requests.
> 
> On Wed, Aug 25, 2010 at 3:35 AM, Jochen Katz <katz at agentpp.com> wrote:
> 
>> Hi,
>>
>>> I am currently using snmp++ in vc++ 2008. In my app, multi-thread use the
>>> same snmp instance to send async request to a snmp proxy. The snmp proxy
>>> distribute the requests to separate agents and return the result to my
>> app.
>>> But sometimes the vb count returned in the callback function is different
>> to
>>> the vb count in the request. Is that a bug? How can I avoid it? Thanks.
>>
>> what version of snmp++ do you use? Maybe this does not occur with the
>> latest version. For SNMPv3 message d creation was fixed in 3.2.23.
>>
>> In what way do the Vbs differ? Is the wrong callback called? Is there
>> just one additional Vb? At the end or at the front? What is the Oid?
>> Which proxy do you use? ... More details please...
>>
>> Regards,
>>  Jochen
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>>
> 
> 
>