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 ResponseEvent snmpGet(String targetOid) throws IOException {
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(targetOid)));
pdu.setType(PDU.GET);
// send the PDU
return snmp.send(pdu, target);
}
/**
* This method is capable of handling multiple OIDs
*
* @param oids
* @return
* @throws IOException
*/
public ResponseEvent get(OID... oids) throws IOException {
PDU pdu = new PDU();
for (OID oid : oids) {
pdu.add(new VariableBinding(oid));
}
pdu.setType(PDU.GET);
ResponseEvent event = snmp.send(pdu, getTarget(), null);
if (event != null) {
return event;
}
throw new RuntimeException("GET timed out");
}
void snmpSetValue(String oid, int syntax, String value) throws SnmpException {
VariableBinding varbind = getVarBindForSetRequest(oid, syntax, value);
PDU request = new PDU();
request.setType(PDU.SET);
request.add(varbind);
PDU response = null;
long startTime = System.currentTimeMillis();
try {
Snmp snmp = new Snmp(new DefaultUdpTransportMapping());
snmp.listen();
ResponseEvent responseEvent = snmp.send(request, getTarget(getWriteCommunity()));
response = responseEvent.getResponse();
// System.out.println(response);
} catch (Exception e) {
e.printStackTrace();
throw new SnmpException(e.getMessage());
}
}
private void createSession() throws IOException {
if (snmp == null) {
Address address = GenericAddress.parse(deviceAddress);
AbstractTransportMapping transport;
if (address instanceof TlsAddress) {
transport = new TLSTM();
} else if (address instanceof TcpAddress) {
transport = new DefaultTcpTransportMapping();
} else {
transport = new DefaultUdpTransportMapping();
}
// Could save some CPU cycles:
transport.setAsyncMsgProcessingSupported(false);
snmp = new Snmp(transport);
snmp.listen();
if (getSnmpVersion() == SnmpConstants.version3) {
snmp.getUSM()
.addUser(
new OctetString("user"),
new UsmUser(
new OctetString("user"),
AuthMD5.ID,
new OctetString("user"),
AuthMD5.ID,
null));
// create the target
target = new UserTarget();
target.setSecurityLevel(SecurityLevel.AUTH_NOPRIV);
target.setSecurityName(new OctetString("user"));
} else {
// create the target
target = new CommunityTarget();
((CommunityTarget) target).setCommunity(new OctetString(configuration.getReadCommunity()));
}
target.setAddress(address);
target.setVersion(getSnmpVersion());
target.setRetries(retries);
target.setTimeout(timeout);
}
}