[AGENT++] unable to decode message

[Padala]

Hi All
   
  My Application using SNMP4J API  is to give response for snmp v3 requests.
 
I have given the following netsnmp command from my linux box.
 
snmpget -v 3 -a MD5 -A 'hello1234'  -l authPriv  -u 'snmpuser1' -x DES -X hello1234 annra01-xp1 1.3.6.1.2.1.2.2.1.2.1 -t 30 -d
 
 
   
My Agent application is responding to snmp request and it is sending the response but NetSNMP Get command unable to decode the message.
 
I also attaching netsnmp output.
   
 
  
class MySNMPResponse extends Thread implements CommandResponder 
{
  
public MySNMPResponse()
  
{
try 
  
{
  
udpAddress = new UdpAddress('0.0.0.0/161');
  
TransportMapping transport = new DefaultUdpTransportMapping(udpAddress); 
  
snmp = new Snmp(transport);
  
localEngineID = ((MPv3)snmp.getMessageProcessingModel
   
  (MessageProcessingModel.MPv3)).createLocalEngineID();
  
USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(localEngineID), 0);
  
SecurityModels.getInstance().addSecurityModel(usm);
  
snmp.getUSM().addUser(new OctetString('snmpuser1'),

  new UsmUser(new OctetString('snmpuser1'),

  AuthMD5.ID, new OctetString('hello1234'),

  PrivDES.ID, new OctetString('hello1234')));
   
  snmp.setLocalEngine(localEngineID, 0, 0);

  snmp.addCommandResponder(this);

  transport.listen();

  start();

  }

  catch(Exception e)

  {

  e.printStackTrace();

  }

  }//MySNMPResponse()

   

  public void run()

  {

  //infinite loop

  while(1);

  }//Run()

   

   

  public synchronized void processPdu(CommandResponderEvent e) 

  {
   
  System.out.println('in ProcessPDU');

   
  //System.out.println(e.getSecurityLevel());
   
  /*Creating Target Object*/

  PDU pdu = e.getPDU();

  TransportMapping tm = e.getTransportMapping();

  if(pdu != null ) 

  {

  int snmpVersion = e.getMessageProcessingModel();

  PDU responsePDU = null;

  Target target = null;

  if(snmpVersion == MessageProcessingModel.MPv1 || snmpVersion == 
   
  MessageProcessingModel.MPv2c ||snmpVersion == MessageProcessingModel.MPv2u)

  { 

  //Create an object of CommunityTarget and assing to target

  //Create an object of PDU and assign to responsePDU

  }

  else if(snmpVersion == MessageProcessingModel.MPv3)

  {

  UserTarget userTarget = new UserTarget();

  userTarget.setAddress((UdpAddress) e.getPeerAddress());

  userTarget.setRetries(1);

  // set timeout to 500 milliseconds -> 2*500ms = 1s total timeout

  userTarget.setTimeout(500);

  userTarget.setVersion(SnmpConstants.version3);

  System.out.println(e.getSecurityLevel());

  System.out.println(new OctetString(e.getSecurityName()));

  userTarget.setSecurityLevel(e.getSecurityLevel());

  userTarget.setSecurityName(new OctetString(e.getSecurityName()));

  ScopedPDU scopedPDU = new ScopedPDU();

  scopedPDU.setContextName(new OctetString('snmpuser1'));

  scopedPDU.setContextEngineID(new OctetString('123456789123456789'));

  responsePDU = scopedPDU;

  target = userTarget;
   
  }

  }

  try

  { 

  //Setting Response Packet Attributes

  responsePDU.setRequestID(new Integer32(pdu.getRequestID().getValue())); 

  responsePDU.setType(PDU.RESPONSE);

  responsePDU.setErrorStatus(PDU.noError);

  responsePDU.setErrorIndex(0); // NO ERROR
   
  Vector variableBindings = pdu.getVariableBindings();
   
  for(int index = 0;index < variableBindings.size();index++)

  {

  Variable value = null;

  VariableBinding var = (VariableBinding)variableBindings.get(index);

  OID oid = var.getOid();

  VariableBinding vbObj = new VariableBinding(oid,new Integer32(4));

  responsePDU.add(vbObj);

  }

  snmp.send(responsePDU, target, tm);

  }

  catch(Exception e)

  {

  e.printStackTrace();

  }
   
  }//ProcessPDU

  public void main(String s[])

  {

  MySNMPResponse resObj = new MySNMPResponse();

  }//main

  }//MySnmpResponse

   

  I would appreciate if you provide any inputs to solve porblem.

   

  Thanks in advance,
  
 Sai

       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.