[SNMP4J] Need help:Unable to run sample snmp code with OIDs
Hi, I have tried running code by commenting hte line u have asked but error is still coming ERROR: Exception in thread "DefaultUDPTransportMapping_192.168.2.2/0" java.lang.NullPointerException at org.snmp4j.transport.DefaultUdpTransportMapping$ListenThread.run(Unknown Source) at java.lang.Thread.run(Unknown Source) at org.snmp4j.util.DefaultThreadFactory$WorkerThread.run(Unknown Source) java.lang.NullPointerException at SNMP4JHelper.snmpGet(SNMP4JHelper.java:132) at SNMP4JHelper.main(SNMP4JHelper.java:45)Response= ___ SNMP4J mailing list SNMP4J@agentpp.org http://lists.agentpp.org/mailman/listinfo/snmp4j
[SNMP4J] Need help:Unable to run sample snmp code with OIDs
Hi,
I have one more code the output is coming NULL for it i dont why.Please if u
can help me on this and the output language is not understandable
import java.io.IOException;
import org.snmp4j.*;
import org.snmp4j.smi.Address;
import org.snmp4j.CommandResponder;
import org.snmp4j.CommandResponderEvent;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.ScopedPDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.UserTarget;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.MPv3;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.security.AuthMD5;
import org.snmp4j.security.PrivDES;
import org.snmp4j.security.SecurityLevel;
import org.snmp4j.security.SecurityModels;
import org.snmp4j.security.SecurityProtocols;
import org.snmp4j.security.USM;
import org.snmp4j.security.UsmUser;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.Snmp;
import org.snmp4j.CommunityTarget;
public class Main
{
public static void main(String[] args) throws IOException{
// TODO code application logic here
Address targetAddress = GenericAddress.parse("udp:127.0.0.1/161");
TransportMapping transport = new DefaultUdpTransportMapping();
Snmp snmp = new Snmp(transport);
//USM - User Based Security Model
USM usm = new USM(SecurityProtocols.getInstance(),
new OctetString(MPv3.createLocalEngineID()), 0);
SecurityModels.getInstance().addSecurityModel(usm);
transport.getListenAddress();
if(transport.getListenAddress()!=null)
System.out.println("Adresa de ascultare
este:"+transport.getListenAddress());
else System.out.println("Nu exista");
byte a[]=new byte[]{1,2};
transport.sendMessage(targetAddress, a);
transport.listen();
if(transport.isListening())
System.out.println("Marimea maxima a mesajul este:
"+transport.getMaxInboundMessageSize());
System.out.println(snmp.getNextRequestID());
snmp.getUSM().addUser(new OctetString("MD5DES"),
new UsmUser(new OctetString("MD5DES"),
AuthMD5.ID,
new
OctetString("MD5DESUserAuthPassword"),
PrivDES.ID,
new
OctetString("MD5DESUserPrivPassword")));
// creare target
UserTarget target = new UserTarget();
target.setAddress(targetAddress);
target.setRetries(1);
target.setTimeout(5000);
target.setVersion(SnmpConstants.version3);
target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
target.setSecurityName(new OctetString("MD5DES"));
System.out.println("User~ul: "+snmp.getUSM());
System.out.println("Adresa la care va fi trimis mesajul:
"+target.getAddress());
// creare PDU
PDU pdu = new ScopedPDU();
pdu.add(new VariableBinding(new OID("1.3.6")));
pdu.setType(PDU.GETNEXT);
System.out.println("Tip PDU: "+pdu.getType());
// trimitere PDU
ResponseEvent response = snmp.send(pdu, target);
// extrage raspunsul PDU (poate fi null daca timpul expira)
PDU responsePDU = response.getResponse();
System.out.println("Raspuns: "+response.getResponse());
//extrage adresa folosita de agent pentru a trimite raspunsul
Address peerAddress = response.getPeerAddress();
System.out.println(response.getRequest());
snmp.listen();
CommunityTarget communityTarget = new CommunityTarget();
communityTarget.setCommunity(new OctetString("public"));
communityTarget.setAddress(targetAddress);
communityTarget.setRetries(3);
communityTarget.setTimeout(3000);
communityTarget.setVersion(SnmpConstants.version1);
System.out.println("Comunity target: "+communityTarget.getCommunity());
// creare PDU
pdu = new PDU();
pdu.add(new VariableBinding(new OID(new int[] {1,3,6,1,2,1,1,1})));
pdu.add(new VariableBinding(new OID(new int[] {1,3,6,1,2,1,1,2})));
pdu.add(new VariableBinding(new OID(new int[] {1,3,6,1,2,1,1,3})));
pdu.add(new VariableBinding(new OID(new int[] {1,3,6,1,2,1,1,4})));
pdu.add(new VariableBinding(new OID(new int[] {1,3,6,1,2,1,1,5})));
pdu.setType(PDU.GETNEXT);
snmp.listen();
ResponseListener listener = new ResponseListener() {
public void onResponse(ResponseEvent event) {
PDU response = event.getResponse();
PDU requ
[SNMP4J] Need help:Unable to run sample snmp code with OIDs
Hi,
I am sending the code with the error line no.
//import java.net.InetAddress;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.*;
import org.snmp4j.transport.DefaultUdpTransportMapping;
//import java.lang.NullPointerException;
public class SNMP4JHelper
{
public static final int SNMP_PORT = 161;
public static final String READ_COMMUNITY = "public";
public static final String WRITE_COMMUNITY= "private";
public static final int mSNMPVersion =0; // 0 represents SNMP version=1
public static final String OID_Hard_disk = "1.3.6.1.2.1.1.3.0";
// "1.3.6.1.4.1.2021.9.1.7.1";
// ".1.3.6.1.4.1.2021.4.4.0";
// "1.3.6.1.4.1.311.1.1.3.1.1.5.1.3";
//"1.3.6.1.4.1.318.1.1.1.12.3.2.1.3.1";
//public static final String
OID_UPS_BATTERY_CAPACITY="1.3.6.1.4.1.318.1.1.1.2.2.1.0";
public static void main(String[] args)
{
try
{
// "172.20.1.150"
String strIPAddress = "127.0.0.1";
SNMP4JHelper objSNMP = new SNMP4JHelper();
//objSNMP.snmpSet();
int Value = 1;
///
//Set Value=2 to trun OFF UPS OUTLET Group1
//Value=1 to trun ON UPS OUTLET Group1
//
// "strIPAddress, WRITE_COMMUNITY,OID_Hard_disk, Value"
// UPS_OUTLET_GROUP1
objSNMP.snmpSet(strIPAddress, WRITE_COMMUNITY,OID_Hard_disk, Value);
//
//Get Basic state of UPS
/
//line 45//
String batteryCap =objSNMP.snmpGet(strIPAddress,READ_COMMUNITY,OID_Hard_disk);
}
catch (Exception e)
{
e.printStackTrace();
}
}
/*
* The following code valid only SNMP version1. This
* method is very useful to set a parameter on remote device.
* */
public void snmpSet(String strAddress, String community, String strOID, int
Value)
{
strAddress= strAddress+"/"+SNMP_PORT;
Address targetAddress = GenericAddress.parse(strAddress);
Snmp snmp;
try
{
TransportMapping transport = new DefaultUdpTransportMapping();
snmp = new Snmp(transport);
transport.listen();
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(5000);
target.setVersion(SnmpConstants.version1);
PDU pdu = new PDU();
// pdu.add(new VariableBinding(new OID(strOID), new
Integer32(Value)));
pdu.setType(PDU.SET);
ResponseListener listener = new ResponseListener()
{
public void onResponse(ResponseEvent event)
{
// Always cancel async request when response has been
received
// otherwise a memory leak is created! Not canceling a
request
// immediately can be useful when sending a request to a
broadcast
// address
((Snmp)event.getSource()).cancel(event.getRequest(), this);
if ( event.getResponse() != null )
{
System.out.println("Set Status
is:"+event.getResponse().getErrorStatusText());
}
}
};
snmp.send(pdu, target, null, listener);
snmp.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
/*
* The code is valid only SNMP version1. SnmpGet method
* return Response for given OID from the Device.
*/
public String snmpGet(String strAddress, String community, String strOID)
{
String str="";
try
{
OctetString comm1 = new OctetString(community);
strAddress= strAddress+"/"+ SNMP_PORT;
Address targetaddress = new UdpAddress(strAddress);
TransportMapping transport = new DefaultUdpTransportMapping();
transport.listen();
CommunityTarget comtarget = new CommunityTarget();
comtarget.setCommunity(comm1);
comtarget.setVersion(SnmpConstants.version1);
comtarget.setAddress(targetaddress);
comtarget.setRetries(2);
comtarget.setTimeout(5000);
PDU pdu = new PDU();
ResponseEvent response;
Snmp snmp;
pdu.add(new VariableBinding(new OID(strO
