Send trap v2 in Java
It took me some time but I finally figured out how to use SNMP4J to send a trap: Hope that helps..
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);
}
I use SNMP4J for this.
This javadoc might help you write your code. You can use the Snmp.trap() method
Edit:
Well, I dont have code of my own at this moment, but you may refer this one . You have to use Snmp.notify() for sending V2 trap instead of Snmp.trap() as trap() only supports sending V1 traps.
A good example that sends trap V1 and notification V2. I just needed to modify the port to 162 and the way to set the sysUpTime for both version V1 and V2.
Tested with snmp4j-1.10.1 and 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());
}
}
}