VariableBinding getVarBindForSetRequest(String oid, int type, String value) {
VariableBinding vb = new VariableBinding(new OID(oid));
if (value != null) {
Variable variable;
switch (type) {
case DSnmpMibRecord.VALUE_TYPE_INTEGER32:
variable = new Integer32(Integer.parseInt(value));
break;
case DSnmpMibRecord.VALUE_TYPE_UNSIGNED_INTEGER32:
variable = new UnsignedInteger32(Long.parseLong(value));
break;
case DSnmpMibRecord.VALUE_TYPE_OCTET_STRING:
variable = new OctetString(value);
break;
case DSnmpMibRecord.VALUE_TYPE_NULL:
variable = new Null();
break;
case DSnmpMibRecord.VALUE_TYPE_OID:
variable = new OID(value);
break;
case DSnmpMibRecord.VALUE_TYPE_TIMETICKS:
variable = new TimeTicks(Long.parseLong(value));
break;
case DSnmpMibRecord.VALUE_TYPE_IP_ADDRESS:
variable = new IpAddress(value);
break;
default:
throw new IllegalArgumentException("Variable type " + type + " not supported");
}
vb.setVariable(variable);
}
return vb;
}
/**
* Encodes a <code>Variable</code> to an <code>OutputStream</code>.
*
* @param outputStream an <code>OutputStream</code>.
* @throws IOException if an error occurs while writing to the stream.
*/
@Override
public void encodeBER(OutputStream outputStream) throws IOException {
BER.encodeHeader(outputStream, type, getBERPayloadLength());
if (type == PDU.V1TRAP) {
enterprise.encodeBER(outputStream);
agentAddress.encodeBER(outputStream);
genericTrap.encodeBER(outputStream);
specificTrap.encodeBER(outputStream);
timestamp.encodeBER(outputStream);
} else {
requestID.encodeBER(outputStream);
errorStatus.encodeBER(outputStream);
errorIndex.encodeBER(outputStream);
}
int vbLength = 0;
for (VariableBinding variableBinding : variableBindings) {
vbLength += variableBinding.getBERLength();
}
BER.encodeHeader(outputStream, BER.SEQUENCE, vbLength);
for (VariableBinding vb : variableBindings) {
if (!isVariableV1(vb.getVariable())) {
throw new IOException("Cannot encode Counter64 into a SNMPv1 PDU");
}
vb.encodeBER(outputStream);
}
}
/**
* Decodes a <code>Variable</code> from an <code>InputStream</code>.
*
* @param inputStream an <code>InputStream</code> containing a BER encoded byte stream.
* @throws IOException
*/
@Override
public void decodeBER(BERInputStream inputStream) throws IOException {
MutableByte pduType = new MutableByte();
int length = BER.decodeHeader(inputStream, pduType);
int pduStartPos = (int) inputStream.getPosition();
switch (pduType.getValue()) {
case PDU.SET:
case PDU.GET:
case PDU.GETNEXT:
case PDU.V1TRAP:
case PDU.RESPONSE:
break;
// The following PDU types are not supported by the SNMPv1 standard!
case PDU.NOTIFICATION:
case PDU.INFORM:
if (SNMP4JSettings.isAllowSNMPv2InV1()) {
break;
}
// fall through
default:
throw new IOException("Unsupported PDU type: " + pduType.getValue());
}
this.setType(pduType.getValue());
if (getType() == PDU.V1TRAP) {
enterprise.decodeBER(inputStream);
agentAddress.decodeBER(inputStream);
genericTrap.decodeBER(inputStream);
specificTrap.decodeBER(inputStream);
timestamp.decodeBER(inputStream);
} else {
requestID.decodeBER(inputStream);
errorStatus.decodeBER(inputStream);
errorIndex.decodeBER(inputStream);
}
// reusing pduType here to save memory ;-)
pduType = new BER.MutableByte();
int vbLength = BER.decodeHeader(inputStream, pduType);
if (pduType.getValue() != BER.SEQUENCE) {
throw new IOException("Encountered invalid tag, SEQUENCE expected: " + pduType.getValue());
}
// rest read count
int startPos = (int) inputStream.getPosition();
variableBindings = new Vector<>();
while (inputStream.getPosition() - startPos < vbLength) {
VariableBinding vb = new VariableBinding();
vb.decodeBER(inputStream);
if (!isVariableV1(vb.getVariable())) {
throw new MessageException("Counter64 encountered in SNMPv1 PDU " + "(RFC 2576 ยง4.1.2.1)");
}
variableBindings.add(vb);
}
if (BER.isCheckSequenceLength()) {
BER.checkSequenceLength(vbLength, (int) inputStream.getPosition() - startPos, this);
BER.checkSequenceLength(length, (int) inputStream.getPosition() - pduStartPos, this);
}
}
private SnmpOidValuePair outputResponse(VariableBinding vb) {
SnmpOidValuePair oidval = new SnmpOidValuePair();
oidval.oid = vb.getOid().toString();
oidval.value_str = vb.getVariable().toString();
if (m_snmpResponseHandler != null) {
m_snmpResponseHandler.responseReceived(oidval);
}
return oidval;
}
@Override
protected int getBERPayloadLengthPDU() {
if (getType() != PDU.V1TRAP) {
return super.getBERPayloadLengthPDU();
} else {
int length = 0;
// length for all vbs
for (VariableBinding variableBinding : variableBindings) {
length += variableBinding.getBERLength();
}
length += BER.getBERLengthOfLength(length) + 1;
length += agentAddress.getBERLength();
length += enterprise.getBERLength();
length += genericTrap.getBERLength();
length += specificTrap.getBERLength();
length += timestamp.getBERLength();
return length;
}
}
/**
* Method which takes a single OID and returns the response from the agent as a String.
*
* @param oid
* @return
* @throws IOException
*/
public String getAsString(OID... oid) throws IOException {
// ResponseEvent event = get(new OID[]{oid});
// return event.getResponse().get(0).getVariable().toString();
ResponseEvent event = get(oid);
PDU response = event.getResponse();
int size = oid.length;
// VariableBinding variableBinding=response.get(0);
// Variable variable=variableBinding.getVariable();
// String varStirng=variable.toString();
// return varStirng;
StringBuilder builder = new StringBuilder();
for (int i = 0; i < size; i++) {
VariableBinding variableBinding = response.get(i);
Variable variable = variableBinding.getVariable();
String varStirng = variable.toString();
String oi = variableBinding.getOid().toString();
builder.append("oid: ").append(oi).append(" var: ").append(varStirng).append("\n");
}
return builder.toString();
}
public void browse(URI url, SnmpUriCallback callback, Object userObject)
throws UnknownHostException {
Request request = createSnmpRequest(url);
PDU pdu = request.getPdu();
switch (request.getType()) {
case GET:
pdu.setType(PDU.GET);
pdu.addAll(VariableBinding.createFromOIDs(request.getOIDs()));
sendSnmpRequest(request, pdu, url, callback, userObject);
break;
case NEXT:
pdu.setType(PDU.GETNEXT);
pdu.addAll(VariableBinding.createFromOIDs(request.getOIDs()));
sendSnmpRequest(request, pdu, url, callback, userObject);
break;
case SUBTREE:
TreeUtils treeUtils = new TreeUtils(snmp, pduFactory);
TreeListener treeListener = new AsyncTreeListener(url, callback);
treeUtils.walk(request.getTarget(), request.getOIDs(), userObject, treeListener);
break;
}
}
private boolean processWalk(PDU response, PDU request, OID rootOID) throws SnmpException {
if ((response == null)
|| (response.getErrorStatus() != 0)
|| (response.getType() == PDU.REPORT)) {
return true;
}
boolean finished = false;
OID lastOID = request.get(0).getOid();
for (int i = 0; (!finished) && (i < response.size()); i++) {
VariableBinding vb = response.get(i);
if ((vb.getOid() == null)
|| (vb.getOid().size() < rootOID.size())
|| (rootOID.leftMostCompare(rootOID.size(), vb.getOid()) != 0)) {
finished = true;
} else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
outputResponse(vb);
finished = true;
} else if (vb.getOid().compareTo(lastOID) <= 0) {
throw new SnmpException(
"Variable received is not lexicographic successor of requested one:"
+ vb.toString()
+ " <= "
+ lastOID);
} else {
outputResponse(vb);
lastOID = vb.getOid();
}
}
if (response.size() == 0) {
finished = true;
}
if (!finished) {
VariableBinding next = response.get(response.size() - 1);
next.setVariable(new Null());
request.set(0, next);
request.setRequestID(new Integer32(0));
}
return finished;
}
/**
* Creates a static managed object group for the sub-tree with the specified root OID.
*
* @param root the root OID of the sub-tree to be registered by this managed object.
* @param vbs the variable bindings to be returned in this sub-tree.
*/
public StaticMOGroup(OID root, VariableBinding[] vbs) {
this.root = root;
this.scope = new DefaultMOScope(root, true, root.nextPeer(), false);
for (VariableBinding vb : vbs) {
if ((vb.getOid() != null) && (vb.getVariable() != null)) {
if ((vb.getOid().size() >= root.size())
&& (vb.getOid().leftMostCompare(root.size(), root) == 0)) {
this.vbs.put(vb.getOid(), vb.getVariable());
}
}
}
}
/**
* 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);
}
}
