Thanks Shivani for the example!

I didn't know "agent-addr" is a standardized SNMPv1 trap element.
I've found it in the SNMPv1 RFC too. [1]

Unfortunately, syslog-ng only supports snmpv2c and snmpv3 versions.
I've checked the code of snmp-dest() and I think it would be _relatively_ easy to add snmpv1 support.
I can open a feature request on GitHub, as I'm not sure when we could get to this in the near future, or is there any reason against SNMPv1.

Regards,
Gabor


[1] https://datatracker.ietf.org/doc/html/rfc1157/#section-4.1.6
From: syslog-ng <syslog-ng-bounces@lists.balabit.hu> on behalf of Fabien Wernli <wernli@in2p3.fr>
Sent: Tuesday, March 22, 2022 8:12
To: Maurya, Shivani <shivani.maurya@intel.com>
Cc: Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu>
Subject: Re: [syslog-ng] Customizing syslog-ng snmp() destination option
 
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Hi again,

On Tue, Mar 22, 2022 at 06:09:32AM +0000, Maurya, Shivani wrote:
> But this is how I want an extra field to be added in trap itself before the variable-binding -
>
> [cid:image002.png@01D83DE1.7C82C330]

As I said, I think you can achieve this using `snmp-obj()`.
Try the following:

    snmp-obj('.1.3.6.1.6.3.18.1.3.0', 'Ipaddress', "${SOURCEIP}")

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