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Java实现snmp的get和walk代码示例

    博客分类：
  • SNMP
JavaSNMP企业应用SNMP getSNMP walk 
阅读更多
    blog迁移至:http://www.micmiu.com

依赖于第三方SNMP4j来实现snmp的get、walk功能,主要实现了如下功能：
  • 一、snmp get 获取单个OID的值
  • 二、snmp get 同步和异步的方式获取多个OID的值
  • 三、snmp walk的方式
  • 四、补充SnmpUtil.java代码

[一]、 snmp get 获取单个OID的值
SnmpGet.java
package com.michael.snmp4j;

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

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

import com.michael.snmp4j.util.SnmpUtil;

/**
 * @see http://sjsky.iteye.com
 * @author Michael
 */
public class SnmpGet {

    private static int version = SnmpConstants.version1;
    private static String protocol = "udp";
    private static int port = 161;

    /**
     * 
     * @param args
     */
    public static void main(String[] args) {

        String ip = "192.168.8.254";
        String community = "public";
        String oidval = "1.3.6.1.2.1.1.3.0";
        SnmpGet tester = new SnmpGet();
        tester.snmpGet(ip, community, oidval);

    }

    @SuppressWarnings("unchecked")
    private void snmpGet(String ip, String community, String oid) {

        String address = protocol + ":" + ip + "/" + port;
        CommunityTarget target = SnmpUtil.createCommunityTarget(address,
                community, version, 2 * 1000L, 3);
        DefaultUdpTransportMapping udpTransportMapping = null;
        Snmp snmp = null;
        try {
            PDU pdu = new PDU();
            // pdu.add(new VariableBinding(new OID(new int[]
            // {1,3,6,1,2,1,1,2})));
            pdu.add(new VariableBinding(new OID(oid)));
            pdu.setType(PDU.GET);

            udpTransportMapping = new DefaultUdpTransportMapping();
            udpTransportMapping.listen();
            snmp = new Snmp(udpTransportMapping);

            // 发送同步消息
            ResponseEvent response = snmp.send(pdu, target);
            System.out.println("PeerAddress:" + response.getPeerAddress());
            PDU responsePdu = response.getResponse();

            if (responsePdu == null) {
                System.out.println(ip + ":Request time out");
            } else {
                Vector vbVect = responsePdu.getVariableBindings();
                System.out.println("vb size:" + vbVect.size());
                if (vbVect.size() == 0) {
                    System.out.println(" pdu vb size is 0 ");
                } else {
                    Object obj = vbVect.firstElement();
                    VariableBinding vb = (VariableBinding) obj;
                    System.out.println(vb.getOid() + " = " + vb.getVariable());
                }

            }
            System.out.println("success finish snmp get the oid!");
        } catch (Exception e) {
            System.out.println("SNMP Get Exception:" + e);
        } finally {
            if (snmp != null) {
                try {
                    snmp.close();
                } catch (IOException ex1) {
                    snmp = null;
                }
            }
            if (udpTransportMapping != null) {
                try {
                    udpTransportMapping.close();
                } catch (IOException ex2) {
                    udpTransportMapping = null;
                }
            }
        }
    }
}


[二]、snmp get 同步和异步的方式获取多个OID的值
同步实现方法:SnmpGetList.java
package com.michael.snmp4j;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

import com.michael.snmp4j.util.SnmpUtil;

/**
 * @see http://sjsky.iteye.com
 * @author Michael
 * 
 */
public class SnmpGetList {

    private static int version = SnmpConstants.version1;
    private static String protocol = "udp";
    private static int port = 161;

    /**
     * 
     * @param args
     */
    public static void main(String[] args) {

        String ip = "192.168.8.254";
        String community = "public";
        SnmpGetList tester = new SnmpGetList();
        List<String> oidList = new ArrayList<String>();
        oidList.add(".1.3.6.1.2.1.1.1.0");
        oidList.add(".1.3.6.1.2.1.1.3.0");
        oidList.add(".1.3.6.1.2.1.1.5.0");
        // synchronous
        tester.snmpGet(ip, community, oidList);

    }

    /**
     * 
     * @param ipAddress
     * @param community
     * @param oid
     */
    private void snmpGet(String ipAddress, String community,
            List<String> oidList) {
        String address = protocol + ":" + ipAddress + "/" + port;
        CommunityTarget target = SnmpUtil.createCommunityTarget(address,
                community, version, 2 * 1000L, 3);
        DefaultUdpTransportMapping transport = null;
        Snmp snmp = null;
        try {
            PDU pdu = new PDU();
            pdu.setType(PDU.GET);
            for (String oid : oidList) {
                pdu.add(new VariableBinding(new OID(oid)));
            }

            transport = new DefaultUdpTransportMapping();
            transport.listen();
            snmp = new Snmp(transport);

            ResponseEvent response = snmp.send(pdu, target);
            PDU resPdu = response.getResponse();
            if (resPdu == null) {
                System.out.println(ipAddress + ":Request time out");
            } else {
                System.out.println(" response pdu vb size is " + resPdu.size());
                for (int i = 0; i < resPdu.size(); i++) {
                    VariableBinding vb = resPdu.get(i);
                    System.out.println(vb.getOid() + "=" + vb.getVariable());
                }
            }
        } catch (Exception e) {
            System.out.println("SNMP GetNext Exception:" + e);
        } finally {
            if (snmp != null) {
                try {
                    snmp.close();
                } catch (IOException ex1) {
                    snmp = null;
                }
            }
            if (transport != null) {
                try {
                    transport.close();
                } catch (IOException ex2) {
                    transport = null;
                }
            }
        }

    }

}

异步实现方法：SnmpGetListAsyn.java 
package michael.snmp.snmp4j;

import java.util.ArrayList;
import java.util.List;

import michael.snmp.util.SnmpUtil;

import org.snmp4j.CommunityTarget;
import org.snmp4j.MessageDispatcherImpl;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.MPv1;
import org.snmp4j.mp.MPv2c;
import org.snmp4j.mp.MPv3;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.util.MultiThreadedMessageDispatcher;
import org.snmp4j.util.ThreadPool;
import org.snmp4j.util.WorkerPool;

/**
 * asynchronous send PDU
 * @see http://sjsky.iteye.com
 * @author Michael
 * 
 */
public class SnmpGetListAsyn {

    private static int version = SnmpConstants.version1;
    private static String protocol = "udp";
    private static int port = 161;

    /**
     * 
     * @param args
     */
    public static void main(String[] args) {

        String ip = "192.168.8.254";
        String community = "public";
        SnmpGetListAsyn tester = new SnmpGetListAsyn();
        List<String> oidList = new ArrayList<String>();
        oidList.add(".1.3.6.1.2.1.1.1.0");
        oidList.add(".1.3.6.1.2.1.1.3.0");
        oidList.add(".1.3.6.1.2.1.1.5.0");
        // asynchronous
        tester.snmpAsynGet(ip, community, oidList);

    }

    /**
     * 
     * @param ipAddress
     * @param community
     * @param oid
     */
    private void snmpAsynGet(String ipAddress, String community,
            List<String> oidList) {
        String address = protocol + ":" + ipAddress + "/" + port;
        CommunityTarget target = SnmpUtil.createCommunityTarget(address,
                community, version, 2 * 1000L, 3);
        DefaultUdpTransportMapping transport = null;
        Snmp snmp = null;
        try {
            WorkerPool threadPool = ThreadPool.create("TestSNMPWorkPool", 2);
            MultiThreadedMessageDispatcher dispatcher = new MultiThreadedMessageDispatcher(
                    threadPool, new MessageDispatcherImpl());
            transport = new DefaultUdpTransportMapping();
            snmp = new Snmp(dispatcher, transport);
            snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());
            snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());
            snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());
            snmp.listen();

            PDU pdu = new PDU();
            pdu.setType(PDU.GET);
            for (String oid : oidList) {
                pdu.add(new VariableBinding(new OID(oid)));
            }

            ResponseListener listener = new ResponseListener() {
                public void onResponse(ResponseEvent event) {
                    ((Snmp) event.getSource()).cancel(event.getRequest(), this);
                    PDU response = event.getResponse();
                    PDU request = event.getRequest();
                    System.out.println("[request]:" + request);
                    if (response == null) {
                        System.out.println("[ERROR]: response is null");
                    } else if (response.getErrorStatus() != 0) {
                        System.out.println("[ERROR]: response status"
                                + response.getErrorStatus() + " Text:"
                                + response.getErrorStatusText());
                    } else {
                        System.out.println("Received response Success!!!");
                        for (int i = 0; i < response.size(); i++) {
                            VariableBinding vb = response.get(i);
                            System.out.println(vb);
                        }

                    }
                }
            };

            snmp.send(pdu, target, null, listener);

            System.out.println("asynchronous send pdu wait for response...");
        } catch (Exception e) {
            System.out.println("SNMP GetNext Exception:" + e);
        }

    }
}

[三]、 SnmpWalk.java 
package com.michael.snmp4j;

import java.io.IOException;

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.Null;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

import com.michael.snmp4j.util.SnmpUtil;

/**
 * SnmpWalk
 * @see http://sjsky.iteye.com
 * @author Michael
 * 
 */
public class SnmpWalk {
    private static int version = SnmpConstants.version1;
    private static String protocol = "udp";
    private static int port = 161;

    /**
     * 
     * @param args
     */
    public static void main(String[] args) {
        String ip = "192.168.8.254";
        String community = "public";
        String targetOid = "1.3.6.1.2.1.2.2.1.2";
        SnmpWalk tester = new SnmpWalk();
        tester.snmpWalk(ip, community, targetOid);

    }

    /**
     * 1)responsePDU == null<br>
     * 2)responsePDU.getErrorStatus() != 0<br>
     * 3)responsePDU.get(0).getOid() == null<br>
     * 4)responsePDU.get(0).getOid().size() < targetOID.size()<br>
     * 5)targetOID.leftMostCompare(targetOID.size(),responsePDU.get(0).getOid())!=0<br>
     * 6)Null.isExceptionSyntax(responsePDU.get(0).getVariable().getSyntax())<br>
     * 7)responsePDU.get(0).getOid().compareTo(targetOID) <= 0<br>
     * @param ipAddress
     * @param community
     * @param oid
     */
    @SuppressWarnings("unused")
    private void snmpWalk(String ip, String community, String targetOid) {
        String address = protocol + ":" + ip + "/" + port;

        OID targetOID = new OID(targetOid);

        PDU requestPDU = new PDU();
        requestPDU.setType(PDU.GETNEXT);
        requestPDU.add(new VariableBinding(targetOID));

        CommunityTarget target = SnmpUtil.createCommunityTarget(address,
                community, version, 2 * 1000L, 3);
        TransportMapping transport = null;
        Snmp snmp = null;
        try {
            transport = new DefaultUdpTransportMapping();
            snmp = new Snmp(transport);
            transport.listen();

            boolean finished = false;
            while (!finished) {
                VariableBinding vb = null;
                ResponseEvent response = snmp.send(requestPDU, target);
                PDU responsePDU = response.getResponse();

                if (null == responsePDU) {
                    System.out.println("responsePDU == null");
                    finished = true;
                    break;
                } else {
                    vb = responsePDU.get(0);
                }
                // check finish
                finished = checkWalkFinished(targetOID, responsePDU, vb);
                if (!finished) {
                    // Dump response.
                    System.out.println("----"+vb.toString());
                    System.out.println("----"+vb.getOid().toString());
                    System.out.println("----"+vb.getVariable().toString());

                    // Set up the variable binding for the next entry.
                    requestPDU.setRequestID(new Integer32(0));
                    requestPDU.set(0, vb);
                }
            }
            System.out.println("success finish snmp walk!");
        } catch (Exception e) {
            System.out.println("SNMP walk Exception: " + e);
        } finally {
            if (snmp != null) {
                try {
                    snmp.close();
                } catch (IOException ex1) {
                    snmp = null;
                }
            }
            if (transport != null) {
                try {
                    transport.close();
                } catch (IOException ex2) {
                    transport = null;
                }
            }
        }

    }

    /**
     * check snmp walk finish
     * @param resquestPDU
     * @param targetOID
     * @param responsePDU
     * @param vb
     * @return
     */
    private boolean checkWalkFinished(OID targetOID, PDU responsePDU,
            VariableBinding vb) {
        boolean finished = false;
        if (responsePDU.getErrorStatus() != 0) {
            System.out.println("responsePDU.getErrorStatus() != 0 ");
            System.out.println(responsePDU.getErrorStatusText());
            finished = true;
        } else if (vb.getOid() == null) {
            System.out.println("vb.getOid() == null");
            finished = true;
        } else if (vb.getOid().size() < targetOID.size()) {
            System.out.println("vb.getOid().size() < targetOID.size()");
            finished = true;
        } else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {
            System.out.println("targetOID.leftMostCompare() != 0");
            finished = true;
        } else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
            System.out
                    .println("Null.isExceptionSyntax(vb.getVariable().getSyntax())");
            finished = true;
        } else if (vb.getOid().compareTo(targetOID) <= 0) {
            System.out.println("Variable received is not "
                    + "lexicographic successor of requested " + "one:");
            System.out.println(vb.toString() + " <= " + targetOID);
            finished = true;
        }
        return finished;

    }

}


[四]、SnmpUtil.java 

package michael.snmp.util;

import org.snmp4j.CommunityTarget;
import org.snmp4j.UserTarget;
import org.snmp4j.mp.SnmpConstants;
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;

/**
 * @see http://sjsky.iteye.com
 * @author michael
 * 
 */
public class SnmpUtil {

    public static final int DEFAULT_VERSION = SnmpConstants.version2c;
    public static final String DEFAULT_PROTOCOL = "udp";
    public static final int DEFAULT_PORT = 161;
    public static final long DEFAULT_TIMEOUT = 3 * 1000L;
    public static final int DEFAULT_RETRY = 3;

    /**
     * 创建共同体对象communityTarget
     * @param address
     * @param community
     * @return CommunityTarget
     */
    public static CommunityTarget createMyDefaultTarget(String address,
            String community) {
        Address targetAddress = GenericAddress.parse(address);
        CommunityTarget target = new CommunityTarget();
        target.setCommunity(new OctetString(community));
        target.setAddress(targetAddress);
        target.setVersion(DEFAULT_VERSION);
        target.setTimeout(DEFAULT_TIMEOUT);// milliseconds
        target.setRetries(DEFAULT_RETRY);
        return target;
    }

    /**
     * 创建共同体对象communityTarget
     * @param targetAddress
     * @param community
     * @param version
     * @return CommunityTarget
     */
    public static CommunityTarget createCommunityTarget(Address targetAddress,
            String community, int version) {
        CommunityTarget target = new CommunityTarget();
        target.setCommunity(new OctetString(community));
        target.setAddress(targetAddress);
        target.setVersion(version);
        return target;
    }

    /**
     * 创建共同体对象communityTarget
     * @param targetAddress
     * @param community
     * @param version
     * @param timeOut
     * @param retry
     * @return CommunityTarget
     */
    public static CommunityTarget createCommunityTarget(Address targetAddress,
            String community, int version, long timeOut, int retry) {
        CommunityTarget target = new CommunityTarget();
        target.setCommunity(new OctetString(community));
        target.setAddress(targetAddress);
        target.setVersion(version);
        target.setTimeout(timeOut); // milliseconds
        target.setRetries(retry);
        return target;
    }

    /**
     * 创建共同体对象communityTarget
     * @param address
     * @param community
     * @param version
     * @param timeOut
     * @param retry
     * @return CommunityTarget
     */
    public static CommunityTarget createCommunityTarget(String address,
            String community, int version, long timeOut, int retry) {
        Address targetAddress = GenericAddress.parse(address);
        return createCommunityTarget(targetAddress, community, version,
                timeOut, retry);
    }

    /**
     * 创建snmp Address
     * @param protocol
     * @param ip
     * @param port
     * @return Address
     */
    public static Address createAddress(String protocol, String ip, int port) {
        String address = protocol + ":" + ip + "/" + port;
        return GenericAddress.parse(address);
    }

    /**
     * 创建snmp udp Address
     * @param ip
     * @param port
     * @return Address
     */
    public static Address createUdpAddress(String ip, int port) {
        String address = ip + "/" + port;
        return new UdpAddress(address);
    }

    /**
     * 创建snmp tcp Address
     * @param ip
     * @param port
     * @return Address
     */
    public static TcpAddress createTcpAddress(String ip, int port) {
        String address = ip + "/" + port;
        return new TcpAddress(address);
    }

    /**
     * 创建 UserTarget
     * @param targetAddress
     * @param version
     * @param timeOut
     * @param level
     * @param securityName
     * @return UserTarget
     */
    public static UserTarget createUserTarget(Address targetAddress,
            int version, long timeOut, int level, String securityName) {
        UserTarget target = new UserTarget();
        target.setAddress(targetAddress);
        target.setRetries(1);
        target.setTimeout(timeOut); // milliseconds
        target.setVersion(version);
        target.setSecurityLevel(level);
        target.setSecurityName(new OctetString(securityName));
        return target;
    }

    /**
     * 创建 UserTarget
     * @param address
     * @param version
     * @param timeOut
     * @param level
     * @param securityName
     * @return UserTarget
     */
    public static UserTarget createUserTarget(String address, int version,
            long timeOut, int level, String securityName) {
        Address targetAddress = GenericAddress.parse(address);
        return createUserTarget(targetAddress, version, timeOut, level,
                securityName);
    }
}


转载请注明来自：Michael's blog @ http://sjsky.iteye.com

-----------------------------------分 ------------------------------------隔 ------------------------------------线 --------------------------------------

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评论
5 楼 muzi_tao 2012-01-13  
为什么不贴上snmp  SET的例子呢？
4 楼 sjsky 2011-08-10  
iamblackwolf 写道
代码好强大，thanks

3 楼 iamblackwolf 2011-08-10  
代码好强大，thanks
2 楼 sjsky 2011-06-17  
chen4w 写道
文章简洁扼要，有帮助，谢谢！但为什么不贴SnmpUtil的代码呢？


这个util类里有很多其他的东西，这里的示例中只引用了一个方法，创建共同体SnmpUtil.createCommunityTarget(....)，当时懒了点 没有贴的，已把SnmpUtil的代码清理了下，贴出了部分
1 楼 chen4w 2011-06-16  
文章简洁扼要，有帮助，谢谢！但为什么不贴SnmpUtil的代码呢？
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