[SNMP4J] SNMP agent implementation

[Pankaj Arora]

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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