使用snmp4j监听和发送消息

MultiThreadedTrapReceiver类：用于接收trap消息

 

package com.snmp.trap;

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

import org.snmp4j.CommandResponder;
import org.snmp4j.CommandResponderEvent;
import org.snmp4j.MessageDispatcherImpl;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
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.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.TcpAddress;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultTcpTransportMapping;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.util.MultiThreadedMessageDispatcher;
import org.snmp4j.util.ThreadPool;

/**
 * 服务器端，监听162端口
 * 
 */
public class MultiThreadedTrapReceiver implements CommandResponder {
	private MultiThreadedMessageDispatcher dispatcher;
	private Snmp snmp = null;
	private Address listenAddress;
	private ThreadPool threadPool;

	public MultiThreadedTrapReceiver() {
	}

	private void init() throws UnknownHostException, IOException {
		threadPool = ThreadPool.create("Trap", 2);
		dispatcher = new MultiThreadedMessageDispatcher(threadPool,
				new MessageDispatcherImpl());
		listenAddress = GenericAddress.parse("udp:127.0.0.1/162"); // 本地IP与监听端口
		TransportMapping transport;
		// 对TCP与UDP协议进行处理
		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("开始监听Trap信息!");
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	/**
	 * 当监听到消息时，会自动调用该方法
	 */
	public void processPdu(CommandResponderEvent respEvnt) {
		// 解析Response
		if (respEvnt != null && respEvnt.getPDU() != null) {
			Vector<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();
	}

}

 

 SendTrap类：用于发送trap消息

 

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;  
  
/** 
 * 代理端，发送trap消息 
 * 
 */  
public class SendTrap {  
    private Snmp snmp = null;  
  
    private Address targetAddress = null;  
  
    public void initComm() throws IOException {  
  
        // 设置管理进程的IP和端口  
        targetAddress = GenericAddress.parse("udp:127.0.0.1/162");  
        TransportMapping transport = new DefaultUdpTransportMapping();  
        snmp = new Snmp(transport);  
        transport.listen();  
  
    }  
  
    /** 
     * 向管理进程发送Trap报文 
     *  
     * @throws IOException 
     */  
    public void sendPDU() throws IOException {  
  
        // 设置 target  
        CommunityTarget target = new CommunityTarget();  
        target.setAddress(targetAddress);  
  
        // 通信不成功时的重试次数  
        target.setRetries(2);  
        // 超时时间  
        target.setTimeout(1500);  
        // snmp版本  
        target.setVersion(SnmpConstants.version2c);  
  
        // 创建 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 {  
            SendTrap sender = new SendTrap();  
            sender.initComm();  
            sender.sendPDU();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
}

1、运行MultiThreadedTrapReceiver类，提示“开始监听Trap信息!”并处理监听状态

 

2、运行SendTrap类，运行完毕后，将会在“开始监听Trap信息!”后面显示：

1.3.6.1.2.3377.10.1.1.1.1 : SnmpTrap

1.3.6.1.2.3377.10.1.1.1.2 : JavaEE

MultiThreadedTrapReceiver输出面板中显示以上两行即表示测试成功！