SNMP++ V3 - USM userName Query

[Jochen Katz]

Hi,

> If two SNMP V3 agents have the same USM userName, but different
> passwords, then I am faced with a problem.

yes, as this is not the standard way.

> In the SNMP Manager, when I call add_usm_user API on the USM object,
> the first entry for Agent1 is replaced by the entry for Agent2. This
> is because UserName is the same.

This is intended, as otherwise the USM does not know which password to 
use to create localized keys.

> Can I based on the two agents' EngineID differentiate between the two
> agents? I request you to kindly inform me of the APIs that can be
> made use of.

Yes, if you know the engineID of the agents, you could use 
USM::add_localized_user(). As this method requires the localized key 
(not the password) you will have to use AuthPriv::password_to_key_XXX() 
to create the keys.
Search "add a new user:" in usm_v3.cpp for an example.

Regards,
   Jochen