[SNMP4J] UnknowHost Exception while sending the snmp trap

[Hallur,Parashuram]

Frank or any body else on the forum:

Would you please help me with pointers on how to fix this issue? What needs
to be done to be able to send the traps from IPv6 application?
Thanks for any pointers.

Parash


On Tue, Mar 5, 2013 at 7:24 AM, Hallur,Parashuram <hallur.p.t at gmail.com>wrote:

> Thanks Frank for the response. Yes the application which is trying to send
> the trap is bound to IPv6 address, would you please help me with how to fix
> this issue?
>
> Thanks,
> Parash
>
>
> On Mon, Mar 4, 2013 at 11:44 PM, Frank Fock <fock at agentpp.com> wrote:
>
>> Hi,
>>
>> I think you are trying to sent an IPv6 address as IpAddress BER encoded
>> on the wire. This is not possible, because the SNMP standard defines
>> IpAddress as IPv4 address and nothing else.
>> If this worked with 1.0 then this was an error in 1.0.
>>
>> Best regards,
>> Frank
>>
>> Am 04.03.2013 12:24, schrieb Hallur,Parashuram:
>>
>>> Hi,
>>>
>>> I'm using the following code to create the target address.
>>>
>>> Address targetAddress =
>>> GenericAddress.parse("udp:<**HostName>:<TrapReceiverPort>/**162");
>>>
>>> This goes through fine when I use the snmp4j1.0.jar. However, this
>>> particular version seems does not support the IPv6 addresses. For IPv6
>>> requests it throws the java.nio.**BufferOverFlowException.
>>> java.nio.**BufferOverflowException
>>>      at java.nio.Buffer.nextPutIndex(**Unknown Source)
>>>      at java.nio.HeapByteBuffer.put(**Unknown Source)
>>>      at org.snmp4j.asn1.**BEROutputStream.write(**
>>> BEROutputStream.java:65)
>>>      at org.snmp4j.asn1.BER.encodeOID(**BER.java:437)
>>>      at org.snmp4j.smi.OID.encodeBER(**OID.java:205)
>>>      at org.snmp4j.smi.**VariableBinding.encodeBER(**
>>> VariableBinding.java:176)
>>>      at org.snmp4j.PDUv1.encodeBER(**PDUv1.java:207)
>>>      at org.snmp4j.mp.MPv1.**prepareOutgoingMessage(MPv1.**java:108)
>>>      at
>>> org.snmp4j.**MessageDispatcherImpl.sendPdu(**MessageDispatcherImpl.java:
>>> **376)
>>>      at org.snmp4j.Snmp.sendMessage(**Snmp.java:900)
>>>      at org.snmp4j.Snmp.send(Snmp.**java:779)
>>>      at org.snmp4j.Snmp.send(Snmp.**java:771)
>>>
>>> To fix the above issue, I picked up the latest jars snmp4j2.1.0.jar,
>>> snmp4j1.11.3.jar, and snmp4j1.10.jar. All of these throw the unknown host
>>> exception. What I notice is that snm4j sends hostname as
>>> "hostname:trapreceiverport" to underneath java api to resolve the
>>> address,
>>> hence the issue unknownhostexception. The same code works with 1.0
>>> version
>>> of jar. Are there any difference from now and then? Any help is very much
>>> appreciated.
>>>
>>> Thanks,
>>> Parash
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