Send trap v2 in Java

Question

How can I send snmpv2 traps from a Java application. I tried to make an example on snmp4j, but that did not work.

Answer 1

I am using SNMP4J for this.

This javadoc can help you write your code. You can use the Snmp.trap () method

Edit:

Well, at the moment I don't have my own code, but you can reference this . You should use Snmp.notify () to send V2 traps instead of Snmp.trap (), since trap () only supports sending V1 traps.

Answer 2

, , , , SNMP4J : , .

  public static void main(String[] args) throws Exception {
      // Create PDU           
      PDU trap = new PDU();
      trap.setType(PDU.TRAP);

      OID oid = new OID("1.2.3.4.5");
      trap.add(new VariableBinding(SnmpConstants.snmpTrapOID, oid));
      trap.add(new VariableBinding(SnmpConstants.sysUpTime, new TimeTicks(5000))); // put your uptime here
      trap.add(new VariableBinding(SnmpConstants.sysDescr, new OctetString("System Description"))); 

      //Add Payload
      Variable var = new OctetString("some string");          
      trap.add(new VariableBinding(oid, var));          

      // Specify receiver
      Address targetaddress = new UdpAddress("10.101.21.32/162");
      CommunityTarget target = new CommunityTarget();
      target.setCommunity(new OctetString("public"));
      target.setVersion(SnmpConstants.version2c);
      target.setAddress(targetaddress);

      // Send
      Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
      snmp.send(trap, target, null, null);                      
}

Answer 3

, V1 V2. 162 sysUpTime V1 V2.

snmp4j-1.10.1 snmp4j-2.1.0.

http://www.techdive.in/snmp/snmp4j-trap-sender

package snippet;

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import java.util.Date;

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.PDUv1;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.IpAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.TimeTicks;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class TrapSender {
    public static final String community = "public";

    // Sending Trap for sysLocation of RFC1213
    public static final String trapOid = ".1.3.6.1.2.1.1.6";

    public static final String ipAddress = "192.168.1.52";

    public static final int port = 162;

    public TrapSender() {
    }

    public static void main(String[] args) {
        TrapSender snmp4JTrap = new TrapSender();

        /* Sending V1 Trap */
        snmp4JTrap.sendSnmpV1Trap();

        /* Sending V2 Trap */
        snmp4JTrap.sendSnmpV2Trap();
    }

    /**
     * This methods sends the V1 trap to the Localhost in port 163
     */
    public void sendSnmpV1Trap() {
        try {
            // Create Transport Mapping
            TransportMapping transport = new DefaultUdpTransportMapping();
            transport.listen();

            // Create Target
            CommunityTarget comtarget = new CommunityTarget();
            comtarget.setCommunity(new OctetString(community));
            comtarget.setVersion(SnmpConstants.version1);
            comtarget.setAddress(new UdpAddress(ipAddress + "/" + port));
            comtarget.setRetries(2);
            comtarget.setTimeout(5000);

            // Create PDU for V1
            PDUv1 pdu = new PDUv1();
            pdu.setType(PDU.V1TRAP);
            pdu.setEnterprise(new OID(trapOid));
            pdu.setGenericTrap(PDUv1.ENTERPRISE_SPECIFIC);
            pdu.setSpecificTrap(1);
            pdu.setAgentAddress(new IpAddress(ipAddress));
                    long sysUpTime = 111111;
        pdu.setTimestamp(sysUpTime);

            // Send the PDU
            Snmp snmp = new Snmp(transport);
            System.out.println("Sending V1 Trap to " + ipAddress + " on Port " + port);
            snmp.send(pdu, comtarget);
            snmp.close();
        } catch (Exception e) {
            System.err.println("Error in Sending V1 Trap to " + ipAddress + " on Port " + port);
            System.err.println("Exception Message = " + e.getMessage());
        }
    }

    /**
     * This methods sends the V2 trap to the Localhost in port 163
     */
    public void sendSnmpV2Trap() {
        try {
            // Create Transport Mapping
            TransportMapping transport = new DefaultUdpTransportMapping();
            transport.listen();

            // Create Target
            CommunityTarget comtarget = new CommunityTarget();
            comtarget.setCommunity(new OctetString(community));
            comtarget.setVersion(SnmpConstants.version2c);
            comtarget.setAddress(new UdpAddress(ipAddress + "/" + port));
            comtarget.setRetries(2);
            comtarget.setTimeout(5000);

            // Create PDU for V2
            PDU pdu = new PDU();

            // need to specify the system up time
                    long sysUpTime = 111111;
            pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new TimeTicks(sysUpTime)));
            pdu.add(new VariableBinding(SnmpConstants.snmpTrapOID, new OID(trapOid)));
            pdu.add(new VariableBinding(SnmpConstants.snmpTrapAddress, new IpAddress(ipAddress)));

            // variable binding for Enterprise Specific objects, Severity (should be defined in MIB file)
            pdu.add(new VariableBinding(new OID(trapOid), new OctetString("Major")));
            pdu.setType(PDU.NOTIFICATION);

            // Send the PDU
            Snmp snmp = new Snmp(transport);
            System.out.println("Sending V2 Trap to " + ipAddress + " on Port " + port);
            snmp.send(pdu, comtarget);
            snmp.close();
        } catch (Exception e) {
            System.err.println("Error in Sending V2 Trap to " + ipAddress + " on Port " + port);
            System.err.println("Exception Message = " + e.getMessage());
        }
    }
}

Answer 4

snmp4j http://www.snmp4j.org/.

import org.snmp4j.*; 
import org.snmp4j.event.*;

...
CommunityTarget target = new CommunityTarget(); 
target.setCommunity(new OctetString("public")); 
target.setAddress(targetAddress); 
target.setVersion(SnmpConstants.version2c); 

PDU request = new PDU(); 
request.setType(PDU.V2TRAP); 
request.setGenericTrap(PDUv2.COLDSTART); 

Snmp snmp = new Snmp(new DefaultUdpTransportMapping()); 
snmp.listen(); 
snmp.sendPDU(request, target, null, listener);

Answer 5

:

http://shivasoft.in/blog/java/snmp/create-snmp-client-in-java-using-snmp4j/

Answer 6

how to send priority (clear, major, fatal) also along with the trap that we send from Java code. I updated the MIB file, but do not know how to use it.

TrapDescWarn OBJECT-TYPE
SYNTAX INTEGER { critical(1),
    major(2),
    informational(3),
    clear(4)
    } 
MAX-ACCESS read-only 
STATUS current
DESCRIPTION "Warning from the payment interface"
 ::= { TrapDefs 10 }