snmp4j 實現 trap監聽

snmp4j 實現 trap監聽

以下代碼可實現基本的trap監聽，僅供參考。

監聽器

package top.leiax00.snmp;

import org.snmp4j.*;
import org.snmp4j.mp.MPv1;
import org.snmp4j.mp.MPv2c;
import org.snmp4j.mp.MPv3;
import org.snmp4j.security.SecurityModels;
import org.snmp4j.security.SecurityProtocols;
import org.snmp4j.security.USM;
import org.snmp4j.smi.*;
import org.snmp4j.transport.DefaultTcpTransportMapping;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.util.MultiThreadedMessageDispatcher;
import org.snmp4j.util.ThreadPool;

import java.io.IOException;
import java.net.UnknownHostException;
import java.util.Vector;

public class MultiThreadedTrapReceiver implements CommandResponder {
    private MultiThreadedMessageDispatcher dispatcher;
    private Snmp snmp = null;
    private Address listenAddress;
    private ThreadPool threadPool;

    public MultiThreadedTrapReceiver() {
        // BasicConfigurator.configure();
    }

    private void init() throws UnknownHostException, IOException {
        threadPool = ThreadPool.create("Trap", 2);
        dispatcher = new MultiThreadedMessageDispatcher(threadPool,
                new MessageDispatcherImpl());
        listenAddress = GenericAddress.parse(System.getProperty(
                "snmp4j.listenAddress", "udp:127.0.0.1/162")); // 本地IP與監聽端口
        TransportMapping transport;
        // 對TCP與UDP協議進行處理
        if (listenAddress instanceof UdpAddress) {
            transport = new DefaultUdpTransportMapping(
                    (UdpAddress) listenAddress);
        } else {
            transport = new DefaultTcpTransportMapping(
                    (TcpAddress) listenAddress);
        }
        snmp = new Snmp(dispatcher, transport);
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());
        USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(MPv3
                .createLocalEngineID()), 0);
        SecurityModels.getInstance().addSecurityModel(usm);
        snmp.listen();
    }


    public void run() {
        try {
            init();
            snmp.addCommandResponder(this);
            System.out.println("開始監聽Trap信息!");
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * 實現CommandResponder的processPdu方法, 用於處理傳入的請求、PDU等信息
     * 當接收到trap時，會自動進入這個方法
     *
     * @param respEvnt
     */
    public void processPdu(CommandResponderEvent respEvnt) {
        // 解析Response
        if (respEvnt != null && respEvnt.getPDU() != null) {
            Vector<? extends VariableBinding> recVBs = respEvnt.getPDU().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) {
        MultiThreadedTrapReceiver multithreadedtrapreceiver = new MultiThreadedTrapReceiver();
        multithreadedtrapreceiver.run();
    }
}

發送trap

package top.leiax00.snmp;

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;

/**
 * 本類用於向管理進程發送Trap信息
 *
 */
public class SnmpUtilSendTrap {

    private Snmp snmp = null;

    private Address targetAddress = null;

    public void initComm() throws IOException {

        // 設置管理進程的IP和端口  
        targetAddress = GenericAddress.parse("udp:127.0.0.1/162");
        TransportMapping transport = new DefaultUdpTransportMapping();
        snmp = new Snmp(transport);
        transport.listen();

    }

    /**
     * 向管理進程發送Trap報文
     *
     * @throws IOException
     */
    public void sendPDU() throws IOException {

        // 設置 target  
        CommunityTarget target = new CommunityTarget();
        target.setAddress(targetAddress);

        // 通信不成功時的重試次數  
        target.setRetries(2);
        // 超時時間  
        target.setTimeout(1500);
        // snmp版本  
        target.setVersion(SnmpConstants.version2c);

        // 創建 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.add(new VariableBinding(new OID(".1.3.6.1.2.3377.10.1.1.1.2"),
                new OctetString("JavaEE")));
        pdu.setType(PDU.TRAP);

        // 向Agent發送PDU，並接收Response  
        ResponseEvent respEvnt = snmp.send(pdu, target);

        // 解析Response  
        if (respEvnt != null && respEvnt.getResponse() != null) {
            Vector<? extends 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 {
            SnmpUtilSendTrap util = new SnmpUtilSendTrap();
            util.initComm();
            util.sendPDU();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}