[SNMP4J] A Simple Trap Receiver using snmp4j

[Shlomo]

Hi,
I used :
http://code.google.com/p/snmphibernate/source/browse/trunk/project/org.opengoss.snmphibernate.impl.snmp4j/src/org/snmp4j/test/MultiThreadedTrapReceiver.java?spec=svn15&r=15

As a reference for my SNMP trap receiver and it works fine. How are you
sending traps themselves?  are you sure the traps are being sent?

I used a UNIX script I found somewhere for sending traps:

classdir=/home/snmp4j/snmp4j/1.10.1
classpath="-classpath ${classdir}/snmp4j-1.10.1.jar"
snmpRequest=org.snmp4j.tools.console.SnmpRequest
uptime="-Cu 42420"
community="-c public"
trapoid="-Ct 1.3.6.1.4069.5.6.7.8.0.9"
target="10.101.2.212/9000"

version_v2c="-v 2c"
pdutype_v2c="-p TRAP"
pdutype_v2c_inform="-p INFORM"

version_v1="-v 1"
pdutype_v1="-p V1TRAP"
specific="-Cs 9"
generic="-Cg 6"
enterprise="-Ce 1.3.6.1.4.1.4069"

options_v1="${version_v1} ${pdutype_v1} ${community} ${uptime} ${enterprise}
${generic} ${specific}"
options_v2c="${version_v2c} ${pdutype_v2c} ${community} ${uptime}
${trapoid}"
options_v2c_inform="${version_v2c} ${pdutype_v2c_inform} ${community}
${uptime} ${trapoid}"

java ${classpath} ${snmpRequest} ${options_v2c} ${target}
"1.3.6.1.4.4.4.4.23={i}42" "1.3.6.1.4.5.6.7.8.0={s}simple trap sender"

Hope it helps you, or you can use the org.snmp4j.tools.console.SnmpRequest
class directly from java.


On Tue, Aug 17, 2010 at 8:36 AM, Tsiyona <tsiyona at gmail.com> wrote:

> Hello,
>
> I am trying to write a simple snmp manager that listens to traps on port
> 162
> and processes them. This manager will only handle traps, and does not need
> to send commands to agents.
>
> Attached is the code I wrote. It is straightforward, but it does not work -
> I do not get any snmp traps.
> I make sure that the snmp agent really constantly generates traps, by using
> a network sniffer, so my
> problem is not lack of traps on the agent side. I am probably doing
> something wrong.
>
> Can anyone please help me?
>
> Thanks,
> Tsiyona
>
>
>
> ---------------------------------------------------------------------------------
>                            My code:
>
> ---------------------------------------------------------------------------------
>
> package snmpmanager;
>
> import java.io.IOException;
>
> import org.snmp4j.CommandResponder;
> import org.snmp4j.CommandResponderEvent;
> import org.snmp4j.PDU;
> import org.snmp4j.Snmp;
> import org.snmp4j.TransportMapping;
> import org.snmp4j.smi.UdpAddress;
> import org.snmp4j.transport.DefaultUdpTransportMapping;
> import org.snmp4j.transport.TransportMappings;
>
> /**
> * A Simple Trap receiver using snmp4j.
> */
> public class SnmpClient
> {
>
> public static final String TRAP_ADDRESS = "127.0.0.1/162";        //"udp:
> 127.0.0.1/162";
>  private TransportMapping transport;
> private String listeningAddress;
>  private Snmp snmp;
>
> public SnmpClient(String address)
> {
>  this.listeningAddress = address;
> try {
> start();
>  } catch (IOException e) {
> e.printStackTrace();
> throw new RuntimeException(e);
>  }
> }
>
> private void start() throws IOException
>  {
> UdpAddress udpAddress = new UdpAddress(this.listeningAddress);
> transport = new DefaultUdpTransportMapping(udpAddress);
>  snmp = new Snmp(transport);
> transport.listen();
>  CommandResponder pduHandler = new CommandResponder() {
>     public synchronized void processPdu(CommandResponderEvent e) {
>       PDU pdu = e.getPDU();
>       if (pdu != null) {
>       System.out.println(pdu);
>       }
>     }
> };
>  snmp.addCommandResponder(pduHandler);
> }
>  public void stop() throws IOException
> {
>  snmp.close();
> }
>
> public static void main(String[] args)
>  {
> SnmpClient client = new SnmpClient(TRAP_ADDRESS);
> System.out.println("Listening for traps on address " + TRAP_ADDRESS);
>  }
> }
>
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>
>