public void snmpWalk(String oidFrom) throws SnmpException {
PDU request = new PDU();
request.setType(PDU.GETNEXT);
request.add(new VariableBinding(new OID(oidFrom)));
request.setNonRepeaters(0);
OID rootOID = request.get(0).getOid();
PDU response = null;
int objects = 0;
int requests = 0;
long startTime = System.currentTimeMillis();
try {
Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
snmp.listen();
m_sessionDestroyed = false;
do {
requests++;
ResponseEvent responseEvent = snmp.send(request, getTarget(getReadCommunity()));
response = responseEvent.getResponse();
if (response != null) {
objects += response.size();
}
} while (!processWalk(response, request, rootOID) && !m_sessionDestroyed);
} catch (SnmpException e) {
throw e;
} catch (Exception e) {
e.printStackTrace();
throw new SnmpException(e.getMessage());
}
if (m_snmpResponseHandler != null) {
m_snmpResponseHandler.requestStats(requests, objects, System.currentTimeMillis() - startTime);
}
}
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;
}
/**
* 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();
}