#2 Setting MIB values fails if multiple groups are registered.

[Jakob]

Hi,
the error is reproducable at the following

Configuration:

- session:AgentXSession is instantiated and connected
to the local master agent Net-SNMP via
connection:AgentXConnection.

- group groupA:AgentXGroup is registered to session to
handle MIB requests for .1.2.3.1.1

- groupA comprises one scalar MIB object of type
integer with OID .1.2.3.1.1.1.0

- group groupB:AgentXGroup is registered to session to
handle MIB requests for .1.2.3.1.1.2

- groupB comprises one scalar MIB object of type
integer with OID .1.2.3.1.1.2.1.0

- snmpset -v2c -cprivate localhost .1.2.3.1.1.2.1.0 i 5
returns INCONSISTENT_NAME although the MIB object
obviously exists.

Reason:

In method AgentXSession.handleSetRequest() groups are
unsufficiently tested on whether they comprise a given
OID or not:

...
int x = oid.compareTo(group.getOID());
if ((x == 0) || (x > group.getOID().getLength())) break;
...

These lines only test, if the OIDs are exactly the same
or the
the OID to be set resides in a subtree of the group
OID. Comparing .1.2.3.1.1 and .1.2.3.1.1.2.1.0 the
latter holds true, i.e. .1.2.3.1.1.2.1.0 indeed seems
to reside in a subtree of .1.2.3.1.1. The second
registered group is never tested. Anyway groupA does
not contain a scalar with such an OID,
INCONSISTENT_NAME is returned.

Solution:

All registered groups must be tested, to actually
contain the scalar MIB object in question. For this
purpose group.getElement() must be called for each
registered group.
I am going to attach the fixed AgentXSession.java. Any
comments are very much appreciated.

Kind regards

Jakob

[Jakob]

Fixed AgentXSession.java