SNMP实例

1. 获取网络设备信息：

import java.io.IOException;

import java.util.Vector;


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.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;


public class SnmpUtil {


       private Snmp snmp = null;


       private Address targetAddress = null;


       public void initComm() throws IOException {

              

              // 设置Agent方的IP和端口

              targetAddress = GenericAddress.parse("udp:127.0.0.1/161");

              TransportMapping transport = new DefaultUdpTransportMapping();

              snmp = new Snmp(transport);

              transport.listen();

       }


       public void sendPDU() throws IOException 
	   {

              // 设置 target

              CommunityTarget target = new CommunityTarget();

              target.setCommunity(new OctetString("public"));

              target.setAddress(targetAddress);

              // 通信不成功时的重试次数

              target.setRetries(2);

              // 超时时间

              target.setTimeout(1500);

              target.setVersion(SnmpConstants.version1);

              // 创建 PDU

              PDU pdu = new PDU();

              pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 5, 0 })));

              // MIB的访问方式

              pdu.setType(PDU.GET);

              // 向Agent发送PDU，并接收Response

              ResponseEvent respEvnt = snmp.send(pdu, target);

              // 解析Response

              if (respEvnt != null && respEvnt.getResponse() != null) {

                     Vector<VariableBinding> recVBs = respEvnt.getResponse()

                                   .getVariableBindings();

                     for (int i = 0; i < recVBs.size(); i++) {

                            VariableBinding recVB = recVBs.elementAt(i);

                            System.out.println(recVB.getOid() + " : " + recVB.getVariable());

                     }

              }

       }


       public static void main(String[] args) {

              try {

                     SnmpUtil util = new SnmpUtil();

                     util.initComm();

                     util.sendPDU();

              } catch (IOException e) {

                     e.printStackTrace();

              }

       }

}

2. 更改设备名

import java.io.IOException;

import java.util.Vector;


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.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;


public class SnmpUtil {


       private Snmp snmp = null;


       private Address targetAddress = null;


       public void initComm() throws IOException {

              

              // 设置Agent方的IP和端口

              targetAddress = GenericAddress.parse("udp:127.0.0.1/161");

              TransportMapping transport = new DefaultUdpTransportMapping();

              snmp = new Snmp(transport);

              transport.listen();

       }


       public ResponseEvent sendPDU(PDU pdu) throws IOException {

              // 设置 target

              CommunityTarget target = new CommunityTarget();

              target.setCommunity(new OctetString("public"));

              target.setAddress(targetAddress);

              // 通信不成功时的重试次数

              target.setRetries(2);

              // 超时时间

              target.setTimeout(1500);

              target.setVersion(SnmpConstants.version1);

              // 向Agent发送PDU，并返回Response

              return snmp.send(pdu, target);

       }

       

       public void setPDU() throws IOException {

              // set PDU

              PDU pdu = new PDU();

              pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 5, 0 }), new OctetString("SNMPTEST")));

              pdu.setType(PDU.SET);

              sendPDU(pdu);

       }

       

       public void getPDU() throws IOException {

              // get PDU

              PDU pdu = new PDU();

              pdu.add(new VariableBinding(new OID(new int[] { 1, 3, 6, 1, 2, 1, 1, 5, 0 })));

              pdu.setType(PDU.GET);

              readResponse(sendPDU(pdu));

       }

       

       public void readResponse(ResponseEvent respEvnt) {

              // 解析Response

              if (respEvnt != null && respEvnt.getResponse() != null) {

                     Vector<VariableBinding> recVBs = respEvnt.getResponse()

                                   .getVariableBindings();

                     for (int i = 0; i < recVBs.size(); i++) {

                            VariableBinding recVB = recVBs.elementAt(i);

                            System.out.println(recVB.getOid() + " : " + recVB.getVariable());

                     }

              }

       }

       

       public static void main(String[] args) {

              try {

                     SnmpUtil util = new SnmpUtil();

                     util.initComm();

                     util.setPDU();

                     util.getPDU();

              } catch (IOException e) {

                     e.printStackTrace();

              }

       }

}

3. 接受trap信息

private TransportMapping transport = null;


       public void initComm() throws IOException {


              // 设置Agent方的IP和端口

              targetAddress = GenericAddress.parse("udp:192.168.1.1/161");

              // 设置接收trap的IP和端口

              transport = new DefaultUdpTransportMapping(new UdpAddress(

                            "192.168.1.2/162"));

              snmp = new Snmp(transport);


              CommandResponder trapRec = new CommandResponder() {

                     public synchronized void processPdu(CommandResponderEvent e) {

                            // 接收trap

                            PDU command = e.getPDU();

                            if (command != null) {

                                   System.out.println(command.toString());

                            }

                     }

              };

              snmp.addCommandResponder(trapRec);


              transport.listen();

       }

public void setTrap() throws IOException {

        // 构造Trap PDU

        PDU pdu = new PDU();

        pdu.add(new VariableBinding(new OID(".1.3.6.1.2.3377.10.1.1.1.1"),

                      new OctetString("SnmpTrap")));

        pdu.setType(PDU.TRAP);

        sendPDU(pdu);

        System.out.println("Trap sent successfully.");

    }

public synchronized void listen() {

              System.out.println("Waiting for traps..");

              try {

                     this.wait();//Wait for traps to come in

              } catch (InterruptedException ex) {

                     System.out.println("Interrupted while waiting for traps: " + ex);

                     System.exit(-1);

              }

       }

       

       public static void main(String[] args) {

              try {

                     SnmpUtil util = new SnmpUtil();

                     util.initComm();

                     util.listen();

              } catch (IOException e) {

                     e.printStackTrace();

              }

       }