[SNMP4J] How to implement MIB?

[Brian Kirwan]

or else an easier (but not free for commercial use) option would be to use 
the AgenPro tool to generate an implementation of your MIB and then override 
the getValue() method of the generated MO classes to call your external 
method.

Brian.

----- Original Message ----- 
From: "Deon van der Merwe" <dvdm at truteq.co.za>
To: <jj777 at speakeasy.net>
Cc: "SNMP4J" <snmp4j at agentpp.org>
Sent: Wednesday, July 13, 2005 8:17 AM
Subject: Re: [SNMP4J] How to implement MIB?


| Hi Jozef,
|
| Here is a very basic example of an application that can receive and 
respond
| to GET requests.  Hope that it helps you...
|
|
| >Date: Thu, 19 Aug 2004 10:28:38 +0200
| >To: snmp4j at agentpp.org
| >From: Deon van der Merwe <dvdm at truteq.co.za>
| >Subject: Re: [SNMP4J] Example Agent
| >
| >Hi Hector,
| >
| >At 08:18 PM 8/18/2004, Hector Aquiles Aranguren Gonzalez wrote:
| >
| >>  Hi, where can i found an example about Make a SNMP Agent with SNMP4J?
| >>    Receive and respond the message to a NMS??
| >
| >I have been able to do this (if I understand your question
| >correctly...)  Here is
| >a little snippet of how I did it.  This was done using the
| >CommandResponder (as
| >Frank suggested)
| >
| >This is part of an existing system, and I removed what I could that has 
no
| >direct
| >relation on this.  Hope that it makes more or less some sense...
| >
| >
| >
| >public class Handler
| >      implements org.snmp4j.CommandResponder {
| >   protected java.lang.String mAddress = null;
| >   protected int mPort = 0;
| >   protected java.lang.String mMyCommunityName = null;
| >   protected org.snmp4j.TransportMapping mServerSocket = null;
| >   protected org.snmp4j.Snmp mSNMP = null;
| >   public Handler() {
| >   }
| >   public void configure(
| >       com.truteq.Configuration aConfiguration)
| >        throws com.truteq.ConfigurationException {
| >     mAddress = aConfiguration.getChild(Constants.ADDRESS).getAsString();
| >     mPort = aConfiguration.getChild(Constants.PORT).getAsInt();
| >     mMyCommunityName =
| > aConfiguration.getChild(Constants.COMMUNITY).getAsString();
| >   }
| >   public void start()
| >        throws com.truteq.ServiceException {
| >     try {
| >       mServerSocket = new
| > org.snmp4j.transport.DefaultUdpTransportMapping(new
| > org.snmp4j.smi.UdpAddress(java.net.InetAddress.getByName(mAddress), 
mPort));
| >       mSNMP = new org.snmp4j.Snmp(mServerSocket);
| >       mSNMP.addCommandResponder(this);
| >       mServerSocket.listen();
| >     } catch (java.net.UnknownHostException vException) {
| >       mLogger.error(vException.getMessage(), vException);
| >     } catch (java.io.IOException vException) {
| >       mLogger.error(vException.getMessage(), vException);
| >     }
| >   }
| >   /**
| >    * this is called by the application that processed the actual SNMP
| > request in
| >    * order to send response...
| >    */
| >   public synchronized void submit(
| >       com.truteq.protocol.Message aMessage)
| >        throws com.truteq.net.HandlerException {
| >     if (aMessage.getType() == com.truteq.protocol.Message.SNMP4J) {
| >       com.truteq.protocol.counter.snmp4j.Message vMessage =
| > (com.truteq.protocol.counter.snmp4j.Message) aMessage;
| >       org.snmp4j.CommandResponderEvent vEvent = vMessage.getPDU();
| >       org.snmp4j.PDU vPDU = vEvent.getPdu();
| >       if (mLogger.isDebugEnabled()) {
| >         mLogger.debug("(snd) " + vPDU.toString());
| >       } else {
| >       }
| >       org.snmp4j.mp.StatusInformation statusInformation = new
| > org.snmp4j.mp.StatusInformation();
| >       org.snmp4j.mp.StateReference ref = vEvent.getStateReference();
| >       try {
| >
| 
 >vEvent.getMessageDispatcher().returnResponsePdu(vEvent.getMessageProcessingModel(),
| >vEvent.getSecurityModel(), vEvent.getSecurityName(),
| >vEvent.getSecurityLevel(), vPDU, vEvent.getMaxSizeResponsePDU(), ref,
| >statusInformation);
| >       } catch (org.snmp4j.MessageException vException) {
| >         mLogger.error(vException.getMessage(), vException);
| >       }
| >     } else {
| >     }
| >   }
| >   public synchronized void processPdu(
| >       org.snmp4j.CommandResponderEvent aEvent) {
| >     java.lang.String vCommunityName = new
| > java.lang.String(aEvent.getSecurityName());
| >     if (mMyCommunityName.equals(vCommunityName)) {
| >       org.snmp4j.PDU vPDU = aEvent.getPdu();
| >       if (vPDU == null) {
| >       } else {
| >         if (mLogger.isDebugEnabled()) {
| >           mLogger.debug("(rcv) " + vPDU.toString());
| >         } else {
| >         }
| >         switch (vPDU.getType()) {
| >           case org.snmp4j.PDU.GET:
| >           case org.snmp4j.PDU.GETNEXT:
| >             try {
| >               setChanged();
| >               notifyObservers(new
| > com.truteq.protocol.counter.snmp4j.Message(aEvent));
| >             } catch (java.lang.Exception vNotifyException) {
| >               mLogger.error(vNotifyException.getMessage(), 
vNotifyException);
| >             }
| >             break;
| >         }
| >       }
| >     } else {
| >       mLogger.warning("supplied community string does not match mine...
| > ignore request: " + aEvent);
| >     }
| >   }
| >}
|
|
|
|
| At 10:03 PM 7/12/2005, jj777 at speakeasy.net wrote:
| >Hello,
| >
| >I have managed to compile and run both SnmpRequest and TestAgent.
| >Now, I am trying to figure out how to write an agent which would
| >implement my simple enterprise MIB. Basically, I would need the
| >agent to properly respond to a GET PDU. It should lunch a proper
| >method on an external object based on the OID, receive the return
| >value from the method and then send the response with the return
| >value back to the client. Which classes should I look at? Can
| >someone point me to the right direction, please?
| >
| >Jozef
| >
| >
| >_______________________________________________
| >SNMP4J mailing list
| >SNMP4J at agentpp.org
| >http://lists.agentpp.org/mailman/listinfo/snmp4j
|
|
| -Deon
| _____________________________________________________
| TruTeq Wireless (Pty) Ltd.  | Tel: +27 (0)12 667 1530
| http://www.truteq.co.za     | Fax: +27 (0)12 667 1531
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