snmp4j SnmpGetNext Example

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SnmpGetNextExample {
	private static String ipAddress = "127.0.0.1";

	private static String port = "161";

	// sysDescr OID of MIB RFC 1213; Scalar Object =
	// .iso.org.dod.internet.mgmt.mib-2.system.sysDescr
	private static String oidValue = ".1.3.6.1.2.1.1.1.0"; // ends with 0 for scalar object

	private static int snmpVersion = SnmpConstants.version1;

	private static String community = "public";

	public static void main(String[] args) throws Exception {
		System.out.println("SNMP GET-NEXT Demo");

		// Create TransportMapping and Listen
		TransportMapping transport = new DefaultUdpTransportMapping();
		transport.listen();

		// Create Target Address object
		CommunityTarget comtarget = new CommunityTarget();
		comtarget.setCommunity(new OctetString(community));
		comtarget.setVersion(snmpVersion);
		comtarget.setAddress(new UdpAddress(ipAddress + "/" + port));
		comtarget.setRetries(2);
		comtarget.setTimeout(1000);

		// Create the PDU object
		PDU pdu = new PDU();
		pdu.add(new VariableBinding(new OID(oidValue))); // Querying GetNext of sysDescr will get the sysObjectID OID
															// value
		pdu.setRequestID(new Integer32(1));
		pdu.setType(PDU.GETNEXT);

		// Create Snmp object for sending data to Agent
		Snmp snmp = new Snmp(transport);

		System.out.println("Request:\n[ Note: GetNext Request is sent for sysDescr oid in RFC 1213 MIB.");
		System.out.println("GetNext Response should get the sysObjectID value rather than sysDescr value ]");
		System.out.println("Sending GetNext Request to Agent for sysDescr ...");

		ResponseEvent response = snmp.getNext(pdu, comtarget);

		// Process Agent Response
		if (response != null) {
			System.out.println("\nResponse:\nGot GetNext Response from Agent...");
			PDU responsePDU = response.getResponse();

			if (responsePDU != null) {
				int errorStatus = responsePDU.getErrorStatus();
				int errorIndex = responsePDU.getErrorIndex();
				String errorStatusText = responsePDU.getErrorStatusText();

				if (errorStatus == PDU.noError) {
					System.out.println("Snmp GetNext Response for sysObjectID = " + responsePDU.getVariableBindings());
				} else {
					System.out.println("Error: Request Failed");
					System.out.println("Error Status = " + errorStatus);
					System.out.println("Error Index = " + errorIndex);
					System.out.println("Error Status Text = " + errorStatusText);
				}
			} else {
				System.out.println("Error: GetNextResponse PDU is null");
			}
		} else {
			System.out.println("Error: Agent Timeout... ");
		}
		snmp.close();
	}
}

输出：

SNMP GET-NEXT Demo
Request:
[ Note: GetNext Request is sent for sysDescr oid in RFC 1213 MIB.
GetNext Response should get the sysObjectID value rather than sysDescr value ]
Sending GetNext Request to Agent for sysDescr ...

Response:
Got GetNext Response from Agent...
Snmp GetNext Response for sysObjectID = [1.3.6.1.2.1.1.2.0 = 1.3.6.1.4.1.311.1.1.3.1.1]