[SNMP4J] SNMP agent implementation

Tue May 19 06:52:39 CEST 2009

Thats right.

On Mon, May 18, 2009 at 9:41 PM, Pankaj Arora <parora at castiron.com> wrote:
> Hi frank,
> Just to clarify. After reading your mail and the document I think
> writing a command Responder and overriding processPdu is not right thing
> to do for my requirements. I need to instrument my Mib using agent
> pro(which is commercial product) or manullay( may be only for oids I
> care). Then register it with the server like you have in test example:
> protected void registerManagedObjects() {
>    try {
> //      server.register(createStaticIfTable(), null);
>      agentppSimulationMIB.registerMOs(server, null);
>      heartbeatMIB.registerMOs(server, null);
>    }
>    catch (DuplicateRegistrationException ex) {
>      ex.printStackTrace();
>    }
>  }
>
> And when the poll event comes the agent will get the right value from
> the instrumented Mib class and reply back.
>
> Do correct me if I am going in wrong direction?
>
> Thanks,
> Pankaj Arora
>
> -----Original Message-----
> From: Frank Fock [mailto:fock at agentpp.com]
> Sent: Monday, May 18, 2009 2:37 AM
> To: Pankaj Arora
> Cc: Senthil Muniswamy; snmp4j
> Subject: Re: [SNMP4J] SNMP agent implementation
>
> Pankaj,
>
> Although you not necessarily need AgenPro to instrument
> your agent, it could be helpful to understand the
> instrumentation concepts. I suggest reading the
> SNMP4J-Agent instrumentation How-To PDF contained in the
> AgenPro download.
>
> Best regards,
> Frank
>
> Pankaj Arora wrote:
>> My requirements are as follows:
>> I have a SNMP service running on my machine. I have a MIB which user
> can
>> poll(snmpwalk, snmpget etc) and I need to reply to specific requests.
>> For that I am using snmp4j agent implementation which gives an option
> to
>> write an agent to which snmp service can forward the incoming
> requests.
>> I am using the TestAgent implementation provided in the snmp4j-agent
>> download as mentioned below. I am looking forward for some help to
>> understand how to hook my replies in that agent so that when a request
>> comes for particular oid's I can reply in a fashioned manner.
>>
>> Thanks a lot for your reply and help.
>> Thanks,
>> Pankaj Arora
>>
>> -----Original Message-----
>> From: Senthil Muniswamy [mailto:senthil.muniswamy at gmail.com]
>> Sent: Sunday, May 17, 2009 7:34 PM
>> To: Pankaj Arora
>> Cc: snmp4j
>> Subject: Re: [SNMP4J] SNMP agent implementation
>>
>> If your MIB is simple then you can implement the agent without
> AgenPro.
>>
>> Sub-agent? Is that Java application you are referring is an another
> SNMP
>> Agent?
>>
>> Could you be clear on your exact requirement?
>>
>>
>> On Sun, May 17, 2009 at 10:25 PM, Pankaj Arora <parora at castiron.com>
>> wrote:
>>> Thanks for the reply.
>>> We are registered with IANA and have our Mib's in hand. I also know
>>> specific Oid's I have to reply to.
>>>
>>> I believe that
>>> TestAgent.java(snmp4j-agent/src/org/snmp4j/agent/test/TestAgent.java)
>>> available as code example in snmp4j-agent implementation has a
>> starting
>>> point to write an agent. It gives gives a sample implementation of
> the
>>> agent. I am trying to hook my code in this as when I configure SNMP
> to
>>> forward the requests to this sub-agent it reaches here. My aim is to
>>> reply to the requests reaching here with right information. I am not
>>> sure how to do this. Why I need agentPro here?
>>> Can you give some more insight on that?
>>> After putting this mail to group I wrote a custom command Responder
>> and
>>> added it to the TestAgent and now requests are dispatched to my
>>> processRequest method in the commandResponder. I am not sure how to
>>> construct the right reply for the request. Is there any example on
> how
>>> to prepare the right reply for requests coming in and how to put your
>>> text in that reply?
>>> Aim is to get some oid's request in the sub-agent and reply in right
>>> format and with some custom information.
>>>
>>> Thanks,
>>> Pankaj Arora
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Senthil Muniswamy [mailto:senthil.muniswamy at gmail.com]
>>> Sent: Friday, May 15, 2009 10:27 PM
>>> To: Pankaj Arora
>>> Cc: snmp4j
>>> Subject: Re: [SNMP4J] SNMP agent implementation
>>>
>>> Pankaj,
>>>
>>> All you need is an SNMP Agent implementation and not the Proxy
>>> Forwarder.
>>>
>>> 1) Get familiar with SNMP Protocol & MIBs.
>>> 2) Register with IANA for enterprise number if your employer don't
>>> have one already.
>>> 3) Find out the information that you want to expose from the Java
>>> application.
>>> 3) Define them in MIBs. Tools like MIB Designer
>>> http://www.mibdesigner.com will help you write easily
>>> 4) Use AgenPro http://www.agentpp.com/agen/agen.html to generate the
>>> SNMP4J code for the MIBs
>>> 5) Implement the generated methods i.e. call the Java application
>>>
>>> HTH.
>>>
>>> On Fri, May 15, 2009 at 6:38 PM, Pankaj Arora <parora at castiron.com>
>>> wrote:
>>>> To give more details:
>>>> I'm writing a SNMP agent. The agent is getting GET requests from
>>>> external
>>>> SNMP compliant program. My agent should process the request (using
>> the
>>>> OID)
>>>> and call another external program (written in java) to fetch this
>>>> requested
>>>> data. Then the agent should return this data to the SNMP compliant
>>>> program
>>>> which requested the data, using the response process.
>>>> I am able to get the request forwarded to the TestAgent provided. I
>> am
>>>> not able to figure out how to hook responder so that for particular
>>>> oid's I can use my code?
>>>> Please give me some pointers.
>>>>
>>>> -----Original Message-----
>>>> From: snmp4j-bounces at agentpp.org [mailto:snmp4j-bounces at agentpp.org]
>>> On
>>>> Behalf Of Pankaj Arora
>>>> Sent: Friday, May 15, 2009 10:50 AM
>>>> To: snmp4j at agentpp.org
>>>> Subject: [SNMP4J] SNMP agent implementation
>>>>
>>>> Hi,
>>>>
>>>> I am new to SNMP development. I have a requirement to create a proxy
>>>> agent which gets the requests forwarded from SNMP and replies to
>> them.
>>> I
>>>> took the TestAgent example provided in snmp4j-agent package and ran
>>> it.
>>>> I am at stage where when I do snmpWalk the request are getting
>>> forwarded
>>>> to the TestAgent class, but I am not sure how to hook my code to
>> reply
>>>> to those requests. Can anyone of you provide some tutorials or
>>>> instructions on how to proceed on this?
>>>>
>>>>
>>>>
>>>> Thanks,
>>>>
>>>> Pankaj Arora
>>>>
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