使用SNMP4J接收Trap示例

    SNMP4J文檔中給的example不完整，在網上找了一天也沒有找到一個好的例子，現在自己終於摸索出來了，就給大家做個參考吧。使用SNMP4JV2.0.2測試正常。

 /* 發送端使用net-snmp,命令如下：
         * snmptrap -e 0x0102030405 -v 3 -u myuser -a MD5 -A mypassword -l authNoPriv 218.195.60.1 42 .1.3.6.1.6.3.1.1.5.4 .1.3.6.1.2.1.2.2.1.1 i 7 .1.3.6.1.2.1.2.2.1.7 i 1 .1.3.6.1.2.1.2.2.1.8 i 1
         */

 

public class TrapDeamon implements CommandResponder
{
    private Snmp snmp;

    public void init() throws Exception
    {
        //create a threadpool to process the traps
        ThreadPool threadPool = ThreadPool.create("TrapDeamon", 3);
        MultiThreadedMessageDispatcher dispatcher = new MultiThreadedMessageDispatcher(threadPool,  new MessageDispatcherImpl());
        String nsap = "udp:" + InetAddress.getLocalHost().getHostAddress() + "/162";
        Address listenAddress = GenericAddress.parse(System.getProperty("snmp4j.listenAddress", nsap));
        TransportMapping transport = null;
        // tcp or udp
        if (listenAddress instanceof UdpAddress)
        {
            transport = new DefaultUdpTransportMapping((UdpAddress) listenAddress);
        }
        else
        {
            transport = new DefaultTcpTransportMapping((TcpAddress) listenAddress);
        }
        //construct a "snmp" instance to handle the snmp massage
        snmp = new Snmp(dispatcher, transport);
        //add msg handling module
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());
        snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());

        //add the enginID in the trap
        OctetString engineID = new OctetString(MPv3.createLocalEngineID());
       //create and add the userSecurityModel
        USM usm = new USM(SecurityProtocols.getInstance(),engineID, 0);
        SecurityModels.getInstance().addSecurityModel(usm);

        //add the securityProtocols,you can skip it if your users are noAuthNoPriv
        SecurityProtocols.getInstance().addDefaultProtocols();


        //create and add the user
        OctetString userName = new OctetString("myuser");
        OctetString password = new OctetString ("mypassword");
        UsmUser usmUser = new UsmUser(userName, AuthMD5.ID, password, null, null);
        snmp.getUSM().addUser(usmUser);

//add other users here...

        snmp.listen();
        snmp.addCommandResponder(this);
        System.out.println("Listening..");

    }

    public void processPdu(CommandResponderEvent respEvnt)
    {
        String peerAddr = respEvnt.getPeerAddress().toString();
        try
        {
            String [] remoteAddr = peerAddr.split("/");
            String ip = remoteAddr[0];

            if (respEvnt != null && respEvnt.getPDU() != null)
            {
                PDU pdu = respEvnt.getPDU();
                switch (pdu.getType())
                {
                    case -89://0xA7 represents V2,V3Trap
                        parsePduV2(ip, pdu);
                        break;
                    case -92://0xA4 represents V1Trap
                        parsePduV1(ip, pdu);
                        break;
                    default://not a Trap,ignore it
                    break;
                }
            }
        }
        catch (Exception e)
        {
            System.out.println("Error occured in processPdu() of " + peerAddr);
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
    }
}