Frank:
I played around with the hostname as "localhost" and the IPv6 address
For the hostname=localhost, it always resolves to IPv4 address, hence the
trap will not be sent from IPv6 bind application.
For the hostname=<IPv6 Address>, it goes through fine
For the hostname=<HostName mapped to IPv6 Address>, it goes through fine.
localhost gets resolved to IPv4 address always may be because the machine
is dual stack configured. I will check by making the machine pure IPv6.
Thanks much for all the help.
Best Regards,
Parash
On Thu, Mar 7, 2013 at 5:15 PM, Hallur,Parashuram <hallur....@gmail.com>wrote:
> Thanks much Frank.
>
> Here is the behavior with the jar snm4j-2.0.jar
>
> I changed the parsing code as you suggested -
> Address targetAddress =
> GenericAddress.parse("udp:<HostName>/<TrapReceiverPort>");
>
> Good news is now this works fine if the trap sending application is bind
> to dual stack addresses. However it does not work if the application is
> bind only to IPv6 address. No exception/error message is generated and
> there is no trap received at the receiver side. Is there a modification
> required for IPv6 only address application to be able to send the trap?
>
> Also, just out of the curiosity, with the snm4j-1.0.jar, the following
> code to parse the address use to work perfect for IPv4 & IPv6
> Address targetAddress =
> GenericAddress.parse("udp:<HostName>:<TrapReceiverPort>/162");
> Does this mean, there is a changing in the parsing logic from now and then?
>
> Thanks again,
> Parash
>
>
>
> On Thu, Mar 7, 2013 at 1:10 PM, Frank Fock <f...@agentpp.com> wrote:
>
>> The format is probably wrong:
>>
>> Address targetAddress = GenericAddress.parse("udp:<**
>> HostName>:<TrapReceiverPort>/**162");
>>
>> Correct would be:
>> Address targetAddress = GenericAddress.parse("udp:<**
>> HostName>/<TrapReceiverPort>")**;
>>
>> Frank
>>
>> Am 07.03.2013 01:18, schrieb Hallur,Parashuram:
>>
>> Frank:
>>> Could you please answer my follow up questions?
>>>
>>> I may attempt test program today my day time.
>>>
>>> Thanks,
>>> Parash
>>>
>>>
>>> On Wed, Mar 6, 2013 at 6:50 PM, Hallur,Parashuram <hallur....@gmail.com
>>> >wrote:
>>>
>>> Frank:
>>>> Thanks again for your response. I'm sorry if I was unclear.
>>>>
>>>> Let me add little more elaboration.
>>>>
>>>> 1. With snmp4j-1.0.jar : Application is bind to IPv6 socket address.
>>>> In this case trying to send the trap fails with the
>>>> java.nio.**BufferOverFlowException is thrown.
>>>>
>>>> 2. With snmp4j-2.0.jar : Application is bind to all machine IP
>>>> addresses.
>>>> Here the application is running/listening on dual stack mode.
>>>> In this case I get the "UnknownHostException" while parsing the target
>>>> address.
>>>>
>>>> 3. With snmp4j-2.0.jar : Application is bind to only IPv6 socket
>>>> address.
>>>> The application is running/listening on IPv6 only address
>>>> In this case also, I get the "UnknownHostException" while parsing the
>>>> target address
>>>>
>>>> A question about the address parsing
>>>> This piece of code works for the application running on Ipv6 only, which
>>>> tries to send the trap?
>>>>
>>>> Address targetAddress =
>>>> GenericAddress.parse("udp:<**HostName>:<TrapReceiverPort>/**162");
>>>>
>>>>
>>>> I will make an attempt to write test program and let you know how it
>>>> goes.
>>>>
>>>> Thanks,
>>>> Parash
>>>>
>>>>
>>>>
>>>> On Wed, Mar 6, 2013 at 6:35 PM, Frank Fock <frank.f...@t-online.de>
>>>> wrote:
>>>>
>>>> Hi Parash,
>>>>>
>>>>> The scenario with the three cases you described below does not make any
>>>>> sense to me.
>>>>> With "the application is bind to an address" you probably mean, the
>>>>> SNMP4J listen
>>>>> address. If so, this could not relate to the exception of case 1.
>>>>> Regarding case 2 and 3, seems to be simply a wrong target address and
>>>>> is
>>>>> unrelated to
>>>>> the local address SNMP4J is bound too.
>>>>>
>>>>> I think you should investigate this further and write a small - only
>>>>> SNMP4J based application
>>>>> that reproduces the error. I do not think that we can get any progress
>>>>> otherwise.
>>>>>
>>>>> Best regards,
>>>>> Frank
>>>>>
>>>>> Am 06.03.2013 09:27, schrieb Hallur,Parashuram:
>>>>>
>>>>> Reposting the complete thread with currect subject
>>>>> ------------------------------**------------------------------**
>>>>> -------------
>>>>>
>>>>> Hi Frank:
>>>>>
>>>>> As I mentioned in my original email, the host is not getting
>>>>> recognized,
>>>>> it throws the "UnknownHostException" at the
>>>>> InetAddress.getByName("**HostName"). The reason is the host name will
>>>>> be sent
>>>>> by snmp4j as "localhost:1622" to this underneath api, ideally it
>>>>> should not
>>>>> be sent with the trap receiver port. I tried this both for IPv4 and
>>>>> IPv6
>>>>> address application, in both cases I see the same issue with
>>>>> snmp4j-2.0.jar.
>>>>>
>>>>> My application is configurable to bind to particular address, it can be
>>>>> configured to bind to single socket address or multiple socket
>>>>> addresses.
>>>>>
>>>>> Following are the cases I tried
>>>>> 1. With snmp4j-1.0.jar : Application is bind to IPv6 socket address,
>>>>> the
>>>>> java.nio.**BufferOverFlowException is thrown.
>>>>> 2. With snmp4j-2.0.jar : Application is bind to all machine IP
>>>>> addresses.
>>>>> "UnknownHostException" while parsing the target address
>>>>> 3. With snmp4j-2.0.jar : Application is bind to only IPv6 socket
>>>>> address.
>>>>> "UnknownHostException" while parsing the target address
>>>>>
>>>>> The code used to parse the address is -
>>>>>
>>>>> Address targetAddress =
>>>>> GenericAddress.parse("udp:<**HostName>:<TrapReceiverPort>/**162");
>>>>>
>>>>> Am I missing something here? Appreciate your help very much. Please let
>>>>> me know if you need more details.
>>>>>
>>>>> Thanks,
>>>>> Parash
>>>>>
>>>>> --------
>>>>>
>>>>> OK, that'a no problem. So then why do you get an exception?
>>>>>
>>>>> Am 06.03.2013 01:15, schrieb Hallur,Parashuram:
>>>>>
>>>>> --------
>>>>>
>>>>> Thank you so much for the response Frank.
>>>>>
>>>>> What do you exactly mean by "trap is bound to IPv6 address"?
>>>>>
>>>>> This means, the application which is running on IPv6 address is trying
>>>>> to
>>>>> send a notification to the trap receiver running on a dual stack IP (
>>>>> both
>>>>> Ipv4 & IPv6 )mode machine.
>>>>>
>>>>> Thanks,
>>>>> Parash
>>>>>
>>>>> ----------
>>>>>
>>>>> Hi Parash,
>>>>>
>>>>> What do you exactly mean by "trap is bound to IPv6 address"?
>>>>>
>>>>> (If you tried to set the agentAddress field in a trap/notification
>>>>> with a
>>>>> IPv6 address
>>>>> you will fail, as SNMP supports IPv4 addresses only for this field.
>>>>>
>>>>> Best regards,
>>>>> Frank
>>>>>
>>>>> Am 06.03.2013 01:05, schrieb Hallur,Parashuram:
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Mar 6, 2013 at 5:39 AM, Hallur,Parashuram <
>>>>> hallur....@gmail.com>wrote:
>>>>>
>>>>> 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....@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 <f...@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
>>>>>>>>> ______________________________**_________________
>>>>>>>>> SNMP4J mailing list
>>>>>>>>> SNMP4J@agentpp.org
>>>>>>>>> http://lists.agentpp.org/**mailman/listinfo/snmp4j<http://lists.agentpp.org/mailman/listinfo/snmp4j>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>> ---
>>>>>>>> AGENT++
>>>>>>>> Maximilian-Kolbe-Str. 10
>>>>>>>> 73257 Koengen, Germany
>>>>>>>> https://agentpp.com
>>>>>>>> Phone: +49 7024 8688230
>>>>>>>> Fax: +49 7024 8688231
>>>>>>>>
>>>>>>>> ______________________________**_________________
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>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>> ______________________________**_________________
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>>>
>>
>> --
>> ---
>> AGENT++
>> Maximilian-Kolbe-Str. 10
>> 73257 Koengen, Germany
>> https://agentpp.com
>> Phone: +49 7024 8688230
>> Fax: +49 7024 8688231
>>
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