(updated wrong subject)
Frank,
My old versions before upgrade were snmp4j-1.11 and snmp4j-agent-1.4
My new versions are snmp4j-2.2.3 and snmp4j-agent-2.0.10a
The line numbers for code in question in
org.snmp4j.agent.DefaultMOServer class:
=== snmp4j-agent-2.0.10a ===
271 public void register(ManagedObject mo, OctetString context)
272 throws DuplicateRegistrationException
273 {
274 if ((context == null) || (context.length() == 0)) {
=== snmp4j-agent-1.4 ===
282 public void register(ManagedObject mo, OctetString context)
283 throws DuplicateRegistrationException
284 {
285 if (context == null) {
Compare lines #274 and #285 for the above versions.
With default context (empty string) for the SNMPv3 the additional
verification in line #274 "(context.length() == 0)" breaks my agent.
It's possible that my BaseAgent implementation has bugs.
However, it was working with snmp4j-1.11/snmp4j-agent-1.4
and failed with snmp4j-2.2.3/snmp4j-agent-2.0.10a
The problem appears for registering managed objects for different
contexts:
v2 and default (empty string) v3.
Thanks,
Mark
On 2013-12-28 04:28, Frank Fock wrote:
Hi Mark,
You wrote that you upgraded SNMP4J but quoted SNMP4J-Agent
code. Have updated SNMP4J-Agent as well? To which version?
Why do you think that user (USM user?) contexts are related
to the MOServer.register(..) method?
(I would claim that they are not related)
Best regards,
Frank
Am 25.12.2013 22:15, schrieb [email protected]:
Hi,
I upgraded my working application from SNMP4J v1.11 to v2.2.3...
There were some minor updates required in my code to use generics.
I discovered a serious problem in my code with SNMP4J v2.2.3:
empty default context for v3 user is not allowed any more
if there is a v2 user defined as well.
The problem is in a org.snmp4j.agent.DefaultMOServer class.
The method register(ManagedObject mo, OctetString context) in v2.2.3
makes following validation:
if ((context == null) || (context.length() == 0)) {
} else ...
The v1.11 implementation had
if (context == null) {
} else ...
The v2.2.3 validates default v3 empty context as v2 and
throws DuplicateRegistrationException if v2 user is present.
Am I missing something or this is a bug?
Thanks,
Mark
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