/** Return the BER encoding of this object. */
protected byte[] getBEREncoding() {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
byte type = SNMPBERCodec.SNMPUNKNOWNOBJECT;
// calculate encoding for length of data
byte[] len = SNMPBERCodec.encodeLength(data.length);
// encode T,L,V info
outBytes.write(type);
outBytes.write(len, 0, len.length);
outBytes.write(data, 0, data.length);
return outBytes.toByteArray();
}
/** Return BER encoding for this object identifier. */
protected byte[] getBEREncoding() {
ByteArrayOutputStream outBytes = new ByteArrayOutputStream();
// write contents of array of values
byte[] data = encodeArray();
// calculate encoding for length of data
byte[] len = SNMPBERCodec.encodeLength(data.length);
// encode T,L,V info
outBytes.write(tag.getByte());
outBytes.write(len, 0, len.length);
outBytes.write(data, 0, data.length);
return outBytes.toByteArray();
}
/**
* The run() method for the trap interface's listener. Just waits for trap or inform messages to
* come in on port 162, then dispatches the recieved PDUs to each of the registered listeners by
* calling their processTrap() or processInform() methods.
*/
@Override
public void run() {
int errorStatus = 0;
int errorIndex = 0;
while (!receiveThread.isInterrupted()) {
try {
DatagramPacket inPacket =
new DatagramPacket(new byte[receiveBufferSize], receiveBufferSize);
dSocket.receive(inPacket);
byte[] encodedMessage = inPacket.getData();
// get IP address of sender, to supply with SNMPv2 traps
// which don't include this in the PDU
InetAddress agentIPAddress = inPacket.getAddress();
/*
errorLog.println("Message bytes length (in): " + inPacket.getLength());
errorLog.println("Message bytes (in):");
for (int i = 0; i < encodedMessage.length; ++i)
{
errorLog.print(hexByte(encodedMessage[i]) + " ");
}
errorLog.println("\n");
*/
SNMPMessage receivedMessage =
new SNMPMessage(SNMPBERCodec.extractNextTLV(encodedMessage, 0).value);
String communityName = receivedMessage.getCommunityName();
Object receivedPDU = receivedMessage.getPDUAsObject();
if (!(receivedPDU instanceof SNMPv1TrapPDU)
&& !(receivedPDU instanceof SNMPv2TrapPDU)
&& !(receivedPDU instanceof SNMPv2InformRequestPDU)) {
throw new SNMPBadValueException(
"PDU received that's not a v1 or v2 trap or inform request; message payload of type "
+ receivedPDU.getClass().toString());
}
// pass the received trap PDU to the processTrap or procesv2Trap method of any listeners
if (receivedPDU instanceof SNMPv1TrapPDU) {
for (int i = 0; i < v1TrapListenerVector.size(); i++) {
SNMPv1TrapListener listener = (SNMPv1TrapListener) v1TrapListenerVector.elementAt(i);
listener.processv1Trap((SNMPv1TrapPDU) receivedPDU, communityName);
}
} else if (receivedPDU instanceof SNMPv2TrapPDU) {
for (int i = 0; i < v2TrapListenerVector.size(); i++) {
SNMPv2TrapListener listener = (SNMPv2TrapListener) v2TrapListenerVector.elementAt(i);
listener.processv2Trap((SNMPv2TrapPDU) receivedPDU, communityName, agentIPAddress);
}
} else if (receivedPDU instanceof SNMPv2InformRequestPDU) {
for (int i = 0; i < v2InformRequestListenerVector.size(); i++) {
SNMPv2InformRequestListener listener =
(SNMPv2InformRequestListener) v2InformRequestListenerVector.elementAt(i);
listener.processv2InformRequest(
(SNMPv2InformRequestPDU) receivedPDU, communityName, agentIPAddress);
}
}
} catch (IOException e) {
// just report the problem
errorLog.println("IOException during request processing: " + e.toString());
errorLog.flush();
} catch (SNMPBadValueException e) {
// just report the problem
errorLog.println("SNMPBadValueException during request processing: " + e.toString());
errorLog.flush();
} catch (Exception e) {
// just report the problem
errorLog.println("Exception during request processing: " + e.toString());
errorLog.flush();
}
}
}
