private void requestAndVerifyResponse(int pduType, int version) throws Exception {
PDU pdu = createPDU(version);
for (AnticipatedRequest a : m_requestedVarbinds) {
pdu.add(a.getRequestVarbind());
}
pdu.setType(pduType);
PDU response = sendRequest(pdu, version);
assertNotNull("request timed out", response);
System.err.println("Response is: " + response);
assertTrue(
"unexpected report pdu: "
+ ((VariableBinding) response.getVariableBindings().get(0)).getOid(),
response.getType() != PDU.REPORT);
assertEquals(
"Unexpected number of varbinds returned.",
m_requestedVarbinds.size(),
response.getVariableBindings().size());
for (int i = 0; i < m_requestedVarbinds.size(); i++) {
AnticipatedRequest a = m_requestedVarbinds.get(i);
VariableBinding vb = response.get(i);
a.verify(vb);
}
reset();
}
public String snmpGet(String strAddress, String community, String strOID) // SNMPget
{
String str = "";
try {
OctetString community1 = new OctetString(community);
strAddress = strAddress + "/" + 161; // Direccion + Puerto SNMP
Address targetaddress = new UdpAddress(strAddress); // direccion con puerto
TransportMapping transport = new DefaultUdpTransportMapping();
transport.listen();
/*
* Este metodo regresa un Target, que contiene informacion acerca de los
* datos y como deben ser mostrados y sus rangos.
*/
CommunityTarget comtarget = new CommunityTarget();
comtarget.setCommunity(community1);
comtarget.setVersion(SnmpConstants.version1);
comtarget.setAddress(targetaddress);
comtarget.setRetries(2);
comtarget.setTimeout(5000);
PDU pdu = new PDU();
ResponseEvent response;
Snmp snmp;
pdu.add(new VariableBinding(new OID(strOID)));
pdu.setType(PDU.GET);
snmp = new Snmp(transport);
response = snmp.get(pdu, comtarget);
if (response != null) {
if (response.getResponse().getErrorStatusText().equalsIgnoreCase("Success")) {
PDU pduresponse = response.getResponse();
str = pduresponse.getVariableBindings().firstElement().toString();
if (str.contains("=")) {
int len = str.indexOf("=");
str = str.substring(len + 1, str.length());
}
}
} else {
System.out.println("Feeling like a TimeOut occured ");
}
// En caso de que ocurra un Time out
snmp.close(); // cierra conexión
} catch (Exception e) {
}
System.out.println("Response= " + str); // en caso de ocurrio error lo arroja
return str;
}
@Override
public void onResponse(ResponseEvent event) {
SnmpUriResponse response = new SnmpUriResponse(SnmpUriResponse.Type.TIMEOUT);
PDU responsePDU = event.getResponse();
if (responsePDU != null) {
if (responsePDU.getErrorStatus() != PDU.noError) {
response = new SnmpUriResponse(responsePDU.getErrorStatus());
} else {
response =
new SnmpUriResponse(
Collections.singletonList(
responsePDU
.getVariableBindings()
.toArray(new VariableBinding[responsePDU.size()])));
}
}
callback.onResponse(response, url, event.getUserObject());
}
public void SentGetSnmp() throws IOException {
TransportMapping transport = new DefaultUdpTransportMapping();
transport.listen();
// Target
CommunityTarget target = CreateAndSetTarget();
// PDU
PDU pdu = CreateAndSetPdu();
// SNMP
Snmp snmp = new Snmp(transport);
// System.out.println("Sending request to " + ipFromInput + " ...");
ResponseEvent response = snmp.get(pdu, target);
if (response != null) {
// System.out.println("Got response from " + ipFromInput);
PDU responsePdu = response.getResponse();
if (responsePdu != null) {
int errorStatus = responsePdu.getErrorStatus();
int errorIndex = responsePdu.getErrorIndex();
String errorStatusText = responsePdu.getErrorStatusText();
if (errorStatus == PDU.noError) {
readResponse(responsePdu.getVariableBindings());
// System.out.println(responsePdu.getVariableBindings().getClass());
// System.out.println("SNMP get response: " + responsePdu.getVariableBindings());
} else {
System.out.println("Error: Request Failed");
System.out.println("Error Status: " + errorStatus);
System.out.println("Error Index: " + errorIndex);
System.out.println("Error Status Text: " + errorStatusText);
}
} else {
System.out.println("Error: PDU response is null");
}
} else {
System.out.println("Error: Agent Timeout");
}
snmp.close();
}
/**
* The method get can be specified with an Array of requested OIDs. A Vector with elements of the
* subclass VariableBinding will be returned. OID requested from the method GET can only return a
* value. Therefore the OIDd must be a scalar and not a branch.
*
* @param oids - the requested OIDs
* @return - a Vector with VariableBindings
* @throws SNMPTimeOutException - will be thrown if a timeout with request happens
* @throws PDURequestFailedException - will be thrown if an error occurs within the request
* @see org.snmp4j.smi.VariableBinding
*/
public Vector<? extends VariableBinding> get(OID[] oids)
throws SNMPTimeOutException, PDURequestFailedException {
ResponseEvent responseEvent = null;
Vector<? extends VariableBinding> vbs = null;
try {
// send the PDU
responseEvent = snmp.send(createPDU(PDU.GET, oids), authentication.getTarget());
Logger.getLogger(SnmpManager.class.getName()).log(Level.INFO, responseEvent.toString());
} catch (IOException e) {
System.err.println(e.getMessage());
}
// extract the response PDU (could be null if timed out)
if (responseEvent != null) {
PDU responsePDU = responseEvent.getResponse();
if (checkResponsePDU(responsePDU)) vbs = responsePDU.getVariableBindings();
} else {
throw new SNMPTimeOutException();
}
return vbs;
}
public static List<String> get(
Snmp snmp, String address, String community, int version, int retry, String[] oids) {
List<String> list = new ArrayList<String>();
Address targetAddress = GenericAddress.parse(address);
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(community));
target.setAddress(targetAddress);
target.setVersion(version);
target.setTimeout(1000);
target.setRetries(retry);
PDU pdu = new PDU();
pdu.setType(PDU.GET);
for (String oid : oids) {
pdu.add(new VariableBinding(new OID(oid)));
}
try {
ResponseEvent response = snmp.send(pdu, target);
PDU resposePdu = response.getResponse();
if (resposePdu != null) {
Vector<?> v = resposePdu.getVariableBindings();
for (Object o : v) {
if (o instanceof VariableBinding) {
VariableBinding vb = (VariableBinding) o;
String r = vb.getVariable().toString();
list.add(r);
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
return list;
}
/**
* Read a variable saved into @DriverConfiguration object
*
* @param propertyConfiguration driver configuration object
* @throws GenericException if configuration fatal error
*/
@Override
public void readValue(DriverConfiguration propertyConfiguration) throws GenericException {
try {
ResponseEvent response = snmpGet(String.valueOf(propertyConfiguration.getValue()));
if (response != null) {
if (log.isDebugEnabled()) {
log.debug("Got Snmp Get Response from Agent");
}
PDU responsePDU = response.getResponse();
if (responsePDU != null) {
int errorStatus = responsePDU.getErrorStatus();
if (errorStatus == PDU.noError) {
Vector<? extends VariableBinding> variableBindings = responsePDU.getVariableBindings();
if (log.isDebugEnabled()) {
log.debug(String.format("Snmp Get Response = %s", variableBindings));
}
VariableBinding variableBinding = variableBindings.get(0);
Variable variable = variableBinding.getVariable();
Object value = convert(variable, getValueType(variable));
setValue(propertyConfiguration, value);
} else {
notifyResponse(response, propertyConfiguration.getName());
}
} else {
if (log.isDebugEnabled()) {
log.debug("Error: Response PDU is null");
}
}
} else {
notifyResponse(response, propertyConfiguration.getName());
}
} catch (Exception e) {
throw new GenericException(e);
}
}
private static Vector<VariableBinding> getTableRow(
Snmp snmp, CommunityTarget target, String[] colOids, String firstOid) {
PDU pdu = new PDU();
pdu.setType(PDU.GETNEXT);
for (String oid : colOids) {
pdu.add(new VariableBinding(new OID(oid)));
}
Vector<VariableBinding> v = null;
try {
ResponseEvent response = snmp.send(pdu, target);
PDU resposePdu = response.getResponse();
if (resposePdu != null) {
v = resposePdu.getVariableBindings();
if (v != null && v.size() > 0) {
VariableBinding vb = v.get(0);
String oid = vb.getOid().toString();
if (!oid.startsWith(firstOid)) return null;
}
}
} catch (IOException e) {
e.printStackTrace();
}
return v;
}
/** {@inheritDoc} */
public PDU processPdu(PDU pdu) throws SnmpToolkitException {
Log log = LogFactory.getLog(this.getClass());
// 応答用のPDUを生成する
PDU retPdu = new PDU();
retPdu.setType(PDU.RESPONSE);
// 要求のリクエストIDを取得し、応答PDUにセットする
Integer32 requestID = pdu.getRequestID();
retPdu.setRequestID(requestID);
// SNMP4J用の型変換オブジェクト
SnmpVariableHelper varHelper = new Snmp4jVariableHelper();
// AgentServiceからAgentを取得する
Agent agent = this.agentService_.getAgent();
// 要求PDUのVarbindを走査する
int varCount = 0;
List<?> reqVarbinds = pdu.getVariableBindings();
for (Object reqVarbindObj : reqVarbinds) {
varCount++;
// 要求されているOIDを取得する
VariableBinding reqVarbind = (VariableBinding) reqVarbindObj;
OID oid = reqVarbind.getOid();
// GETNEXTでない場合は、指定されたOIDそのものを取得しようとする
// GETNEXTの場合は、指定されたOID配下で最も近いオブジェクトを探す
boolean exact = (pdu.getType() != PDU.GETNEXT);
SnmpVarbind foundVarbind = agent.findObject(oid.toString(), exact);
if (foundVarbind == null) {
// Varbindが見つからなかった場合はnoSuchNameを返す
log.warn("varbind is not found. oid=" + oid.toString());
retPdu.setErrorStatus(SnmpConstants.SNMP_ERROR_NO_SUCH_NAME);
retPdu.setErrorIndex(varCount);
Variable retObject = new Null();
VariableBinding retVarbind = new VariableBinding(oid, retObject);
retPdu.add(retVarbind);
break;
}
// READ-WRITEでなければエラー応答を返す
String accessibility = foundVarbind.getAccessibility();
if (accessibility.equals(SnmpVarbind.ACCESSIBILITY_NOT_ACCESSIBLE) == true) {
log.warn("varbind is not accessible. accessibility=" + accessibility);
retPdu.setErrorStatus(SnmpConstants.SNMP_ERROR_NO_ACCESS);
retPdu.setErrorIndex(varCount);
Variable retObject = new Null();
VariableBinding retVarbind = new VariableBinding(oid, retObject);
retPdu.add(retVarbind);
break;
}
try {
// 正常の応答を返す
retPdu.setErrorStatus(SnmpConstants.SNMP_ERROR_SUCCESS);
retPdu.setErrorIndex(0);
log.debug("varbind is found: " + foundVarbind.toString());
String typeStr = foundVarbind.getType();
Object retValueObj = foundVarbind.getValue();
Variable retObject = (Variable) varHelper.createAsnObject(retValueObj, typeStr);
OID retOID = new OID(foundVarbind.getOid());
VariableBinding retVarbind = new VariableBinding(retOID, retObject);
retPdu.add(retVarbind);
} catch (Exception exception) {
log.warn("exception occured", exception);
// 未知のエラーを示す応答PDUを作成する
retPdu.setErrorStatus(SnmpConstants.SNMP_ERROR_GENERAL_ERROR);
retPdu.setErrorIndex(varCount);
if (foundVarbind != null) {
OID retOID = new OID(foundVarbind.getOid());
Variable retObject = new Null();
VariableBinding retVarbind = new VariableBinding(retOID, retObject);
retPdu.add(retVarbind);
}
}
}
return retPdu;
}
/**
* This method will be called whenever a pdu is received on the given port specified in the
* listen() method.
*/
public synchronized void processPdu(CommandResponderEvent cmdRespEvent) {
logger.info("Received PDU...");
PDU pdu = cmdRespEvent.getPDU();
if (pdu != null) {
try {
Event event;
Map<String, String> headers;
StringBuilder stringBuilder = new StringBuilder();
// getVariableBindings: Gets the variable binding vector.
Vector<? extends VariableBinding> vbs = pdu.getVariableBindings();
for (VariableBinding vb : vbs) {
// To extract only the value of the OID
// stringBuilder.append(vb.getVariable().toString());
stringBuilder.append(vb.toString() + ",");
}
String messageString = stringBuilder.toString();
// trick: remove the last comma
messageString = messageString.replaceAll(",$", "");
byte[] message = messageString.getBytes();
event = new SimpleEvent();
headers = new HashMap<String, String>();
headers.put("timestamp", String.valueOf(System.currentTimeMillis()));
logger.info("Message: {}", messageString);
event.setBody(message);
event.setHeaders(headers);
if (event == null) {
return;
}
// store the event to underlying channels(s)
getChannelProcessor().processEvent(event);
counterGroup.incrementAndGet("events.success");
} catch (ChannelException ex) {
counterGroup.incrementAndGet("events.dropped");
logger.error("Error writting to channel", ex);
return;
}
logger.info("Trap Type = " + pdu.getType());
logger.info("Variable Bindings = " + pdu.getVariableBindings());
int pduType = pdu.getType();
if ((pduType != PDU.TRAP)
&& (pduType != PDU.V1TRAP)
&& (pduType != PDU.REPORT)
&& (pduType != PDU.RESPONSE)) {
pdu.setErrorIndex(0);
pdu.setErrorStatus(0);
pdu.setType(PDU.RESPONSE);
StatusInformation statusInformation = new StatusInformation();
StateReference ref = cmdRespEvent.getStateReference();
try {
System.out.println(cmdRespEvent.getPDU());
cmdRespEvent
.getMessageDispatcher()
.returnResponsePdu(
cmdRespEvent.getMessageProcessingModel(),
cmdRespEvent.getSecurityModel(),
cmdRespEvent.getSecurityName(),
cmdRespEvent.getSecurityLevel(),
pdu,
cmdRespEvent.getMaxSizeResponsePDU(),
ref,
statusInformation);
} catch (MessageException ex) {
System.err.println("Error while sending response: " + ex.getMessage());
LogFactory.getLogger(SnmpRequest.class).error(ex);
}
}
}
}
