Java PDU类代码示例

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * 向接收器发送Trap 信息
 * 
 * @throws IOException
 */
public void sendPDU() throws IOException {
	PDU pdu = new PDU();
	pdu.add(new VariableBinding(
			new OID(".1.3.6.1.2.1.1.1.0"),
			new OctetString("SNMP Trap Test.see more:http://www.micmiu.com")));
	pdu.add(new VariableBinding(SnmpConstants.sysUpTime, new TimeTicks(
			new UnsignedInteger32(System.currentTimeMillis() / 1000)
					.getValue())));
	pdu.add(new VariableBinding(SnmpConstants.snmpTrapOID, new OID(
			".1.3.6.1.6.3.1.1.4.3")));

	// 向Agent发送PDU
	pdu.setType(PDU.TRAP);
	snmp.send(pdu, target);
	System.out.println("----> Trap Send END <----");
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
private void processResponse(PDU response) {
    try {
        if (log().isDebugEnabled()) {
            log().debug("Received a tracker PDU of type "+PDU.getTypeString(response.getType())+" from "+getAddress()+" of size "+response.size()+", errorStatus = "+response.getErrorStatus()+", errorStatusText = "+response.getErrorStatusText()+", errorIndex = "+response.getErrorIndex());
        }
        if (response.getType() == PDU.REPORT) {
            handleAuthError("A REPORT PDU was returned from the agent.  This is most likely an authentication problem.  Please check the config");
        } else {
            if (!processErrors(response.getErrorStatus(), response.getErrorIndex())) {
                if (response.size() == 0) { // NMS-6484
                    handleError("A PDU with no errors and 0 varbinds was returned from the agent at " + getAddress() + ". This seems to be related with a broken SNMP agent.");
                } else {
                    for (int i = 0; i < response.size(); i++) {
                        VariableBinding vb = response.get(i);
                        SnmpObjId receivedOid = SnmpObjId.get(vb.getOid().getValue());
                        SnmpValue val = new Snmp4JValue(vb.getVariable());
                        Snmp4JWalker.this.processResponse(receivedOid, val);
                    }
                }
            }
            buildAndSendNextPdu();
        }
    } catch (Throwable e) {
        handleFatalError(e);
    }
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * TODO: Merge this logic with {@link Snmp4JWalker.Snmp4JResponseListener#processResponse(PDU response)}
 */
private static SnmpValue[] processResponse(Snmp4JAgentConfig agentConfig, ResponseEvent responseEvent) throws IOException {
    SnmpValue[] retvalues = { null };

    if (responseEvent.getResponse() == null) {
        log().warn("processResponse: Timeout.  Agent: "+agentConfig);
    } else if (responseEvent.getError() != null) {
        log().warn("processResponse: Error during get operation.  Error: "+responseEvent.getError().getLocalizedMessage(), responseEvent.getError());
    } else if (responseEvent.getResponse().getType() == PDU.REPORT) {
        log().warn("processResponse: Error during get operation.  Report returned with varbinds: "+responseEvent.getResponse().getVariableBindings());
    } else if (responseEvent.getResponse().getVariableBindings().size() < 1) {
        log().warn("processResponse: Received PDU with 0 varbinds.");
    } else if (responseEvent.getResponse().get(0).getSyntax() == SMIConstants.SYNTAX_NULL) {
        log().info("processResponse: Null value returned in varbind: " + responseEvent.getResponse().get(0));
    } else {
        retvalues = convertResponseToValues(responseEvent);

        if (log().isDebugEnabled()) {
            log().debug("processResponse: SNMP operation successful, value: "+Arrays.toString(retvalues));
        }
    }

    return retvalues;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * walk的方式获取监控值
 * 通过获得的总值除数量的逻辑
 * @param session
 * @param oid
 * @return
 * @throws IOException
 */
private static CollectObject walkForSumDivCount(SNMPV3Session session, String oid) throws IOException {
    CollectObject collectObject = new CollectObject();
    List<PDU> pduList = session.walk(oid);

    int count = pduList.size();
    long value = 0;

    for (PDU pdu : pduList) {
        value += Long.parseLong(SNMPHelper.getValueFromPDU(pdu));
    }

    collectObject.setSession(session);
    collectObject.setMetrics(metricsName);
    collectObject.setValue(0 + "");
    if(count > 0){
        collectObject.setValue(String.valueOf(value / count));
    }
    collectObject.setTime(new Date());

    return collectObject;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
private static CollectObject getOldHuawei_Mem(SNMPV3Session session, String oid) throws IOException {
    CollectObject collectObject = new CollectObject();
    collectObject.setSession(session);
    collectObject.setMetrics(metricsName);
    collectObject.setTime(new Date());

    String memTotalOid = "1.3.6.1.4.1.2011.6.1.2.1.1.2";
    List<PDU> snmpMemTotal = session.walk(memTotalOid);

    String memFreeOid = "1.3.6.1.4.1.2011.6.1.2.1.1.3";
    List<PDU> snmpMemFree = session.walk(memFreeOid);

    if(snmpMemFree.isEmpty() || snmpMemTotal.isEmpty()){
        log.warn("{} No Such Object available on this agent at this OID",session);
        return null;
    }

    int memTotal = Integer.parseInt(SNMPHelper.getValueFromPDU(snmpMemTotal.get(0)));
    int memFree = Integer.parseInt(SNMPHelper.getValueFromPDU(snmpMemFree.get(0)));
    collectObject.setValue(String.valueOf(((float) memTotal - (float)memFree) / (float)memTotal));

    return collectObject;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
static CollectObject getH3CHWcpumem(String metricsName,SNMPV3Session session, String oid) throws IOException {
    CollectObject collectObject = new CollectObject();

    List<PDU> pduList = session.walk(oid);
    String value = "";
    for (PDU pdu : pduList) {
        if(pdu.get(0).getVariable().toLong() != 0){
            value = SNMPHelper.getValueFromPDU(pdu);
            break;
        }
    }
    collectObject.setSession(session);
    collectObject.setMetrics(metricsName);
    collectObject.setValue(value);
    collectObject.setTime(new Date());

    return collectObject;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
private static CollectObject getCisco_ASA_Mem(SNMPV3Session session, String oid) throws IOException {
    String memUsedOid = "1.3.6.1.4.1.9.9.221.1.1.1.1.18";
    List<PDU> memUsedListPDU = session.walk(memUsedOid);
    String memFreeOid = "1.3.6.1.4.1.9.9.221.1.1.1.1.20";
    List<PDU> memFreeListPDU = session.walk(memFreeOid);

    CollectObject collectObject = new CollectObject();
    collectObject.setMetrics(metricsName);
    collectObject.setSession(session);
    collectObject.setTime(new Date());

    if(SNMPHelper.isValidPDU(memFreeListPDU.get(0)) && SNMPHelper.isValidPDU(memUsedListPDU.get(0))){
        int memUsed = Integer.parseInt(SNMPHelper.getValueFromPDU(memUsedListPDU.get(0)));
        int memFree = Integer.parseInt(SNMPHelper.getValueFromPDU(memFreeListPDU.get(0)));
        if(memUsed+memFree != 0){
            collectObject.setValue(String.valueOf((double)memUsed / ((double)memUsed + (double)memFree)));
        }
    }

    return collectObject;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
private static CollectObject getCisco_IOS_XR_Mem(SNMPV3Session session, String oid) throws IOException {
    CollectObject collectObject = new CollectObject();
    collectObject.setMetrics(metricsName);
    collectObject.setSession(session);
    collectObject.setTime(new Date());

    String cpuIndex = "1.3.6.1.4.1.9.9.109.1.1.1.1.2";
    PDU cpuIndexPDU = session.getNext(cpuIndex);
    if(cpuIndexPDU.get(0) != null){
        int index  = Integer.parseInt(SNMPHelper.getValueFromPDU(cpuIndexPDU));
        String memUsedOid = "1.3.6.1.4.1.9.9.221.1.1.1.1.18." + index + ".1";
        String memFreeOid = "1.3.6.1.4.1.9.9.221.1.1.1.1.20." + index + ".1";
        PDU memUsedPDU = session.get(memUsedOid);
        PDU memFreePDU = session.get(memFreeOid);
        setRatioValueHelper(memUsedPDU,memFreePDU,collectObject);
    }

    return collectObject;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * 获取指定OID的 get
 *
 * @param snmp
 * @param target
 * @param oid
 * @return
 * @throws IOException
 */
public static PDU snmpGet(Snmp snmp, Target target, String oid) throws IOException {
    ScopedPDU pdu = new ScopedPDU();
    pdu.setType(PDU.GET);
    pdu.add(new VariableBinding(new OID(oid)));

    ResponseEvent responseEvent = snmp.send(pdu, target);
    PDU response = responseEvent.getResponse();
    if(response == null){
        log.warn("response null - error:{} peerAddress:{} source:{} request:{}",
                responseEvent.getError(),
                responseEvent.getPeerAddress(),
                responseEvent.getSource(),
                responseEvent.getRequest());
    }
    return response;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * walk方式获取指定的oid value
 *
 * @param snmp
 * @param target
 * @param oid
 * @return
 * @throws IOException
 */
public static List<PDU> snmpWalk(Snmp snmp, Target target, String oid) throws IOException {
    List<PDU> pduList = new ArrayList<>();

    ScopedPDU pdu = new ScopedPDU();
    OID targetOID = new OID(oid);
    pdu.add(new VariableBinding(targetOID));

    boolean finished = false;
    while (!finished) {
        VariableBinding vb = null;
        ResponseEvent respEvent = snmp.getNext(pdu, target);

        PDU response = respEvent.getResponse();

        if (null == response) {
            break;
        } else {
            vb = response.get(0);
        }
        // check finish
        finished = checkWalkFinished(targetOID, pdu, vb);
        if (!finished) {
            pduList.add(response);

            // Set up the variable binding for the next entry.
            pdu.setRequestID(new Integer32(0));
            pdu.set(0, vb);
        }
    }

    return pduList;
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
private static boolean checkWalkFinished(OID targetOID, PDU pdu, VariableBinding vb) {
    boolean finished = false;
    if (pdu.getErrorStatus() != 0) {
        finished = true;
    } else if (vb.getOid() == null) {
        finished = true;
    } else if (vb.getOid().size() < targetOID.size()) {
        finished = true;
    } else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {
        finished = true;
    } else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
        finished = true;
    } else if (vb.getOid().compareTo(targetOID) <= 0) {
        finished = true;
    }
    return finished;

}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * 获取设备描述字符串
 *
 * @return
 * @throws IOException
 */
public String getSysDesc() throws IOException {
    String key = getInfoCacheKey() + CACHE_KEY_SYS_DESC;
    String sysDesc = (String) infoCache.get(key);
    if(sysDesc != null){
        return sysDesc;
    }
    PDU pdu = this.get(SNMPHelper.SYS_DESC_OID);
    if(pdu != null){
        sysDesc = pdu.get(0).getVariable().toString();
        infoCache.put(key,sysDesc);
        return sysDesc;
    }else {
        return "";
    }

}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * 获取设备描述字符串
 *
 * @return
 * @throws IOException
 */
public String getSysDesc() throws IOException {
    String key = getInfoCacheKey() + cacheKey_sysDesc;
    String sysDesc = (String) infoCache.get(key);
    if(sysDesc != null){
        return sysDesc;
    }
    PDU pdu = this.get(SNMPHelper.sysDescOid);
    if(pdu != null){
        sysDesc = pdu.get(0).getVariable().toString();
        infoCache.put(key,sysDesc);
        return sysDesc;
    }else {
        return "";
    }

}
 

import org.snmp4j.PDU; //导入依赖的package包/类
public void onResponse(ResponseEvent event) {
    // Always cancel async request when response has been received
    // otherwise a memory leak is created! Not canceling a request
    // immediately can be useful when sending a request to a broadcast address.
    ((Snmp)event.getSource()).cancel(event.getRequest(), this);

    // check for valid response
    if (event.getRequest() == null || event.getResponse() == null) {
        // ignore null requests/responses
        LOG.debug("Received invalid SNMP event. Request: " + event.getRequest() + " / Response: " + event.getResponse());
        return;
    }
    
    PDU pdu = event.getResponse();
    processPDU(pdu);
}
 

import org.snmp4j.PDU; //导入依赖的package包/类
/**
 * {@inheritDoc}
 */
@Override
protected void validateResponse(ResponseEvent event) {
  super.validateResponse(event);
  PDU response = event.getResponse();
  final int responseSize = response.size();
  
  if (responseSize <= nonRepeaters) {
    throw new TruncatedResponseException(
        "response contains no repeaters; too many non-repeaters?");
  }
  
  if (nonRepeaters + repeaters >= responseSize) {
    if (context.getConfig().isWalkAllowsTruncatedRepetition()) {
      this.repeaters = responseSize - nonRepeaters;
    }
    else {
      throw new TruncatedResponseException(
          "response contains partial first repetition; "
          + "set walkAllowsTruncatedRepetition if you wish to allow it");
    }
  }
}