Examples with HeaderIncompleteException org.smpp.pdu.HeaderIncompleteException used on opensource projects

Example 1 with HeaderIncompleteException

use of org.smpp.pdu.HeaderIncompleteException in project opensmpp by OpenSmpp.

the class ReceiverBase method tryGetUnprocessedPDU.

/**
 * Tries to create a PDU from the buffer provided.
 * Returns the PDU if successfull or null if not or an exception
 * if the PDU is incorrect.
 */
private final PDU tryGetUnprocessedPDU(Unprocessed unprocessed) throws UnknownCommandIdException, PDUException {
    debug.write(DRXTX, "trying to create pdu from unprocessed buffer");
    PDU pdu = null;
    ByteBuffer unprocBuffer = unprocessed.getUnprocessed();
    try {
        pdu = PDU.createPDU(unprocBuffer);
        unprocessed.check();
        // Reset counter after successful createPDU (as per bug #2138444):
        messageIncompleteRetryCount = 0;
    } catch (HeaderIncompleteException e) {
        // the header wasn't received completly, we will try to
        // receive the rest next time
        debug.write(DRXTXD, "incomplete message header, will wait for the rest.");
        // as it's incomplete - wait for new data
        unprocessed.setHasUnprocessed(false);
        unprocessed.setExpected(Data.PDU_HEADER_SIZE);
    } catch (MessageIncompleteException e) {
        // busy servers and PDUs split across TCP packets.
        if (messageIncompleteRetryCount > 5) {
            messageIncompleteRetryCount = 0;
            event.write("Giving up on incomplete messages - probably garbage in unprocessed buffer. Flushing unprocessed buffer.");
            unprocessed.reset();
        }
        // the message wasn't received completly, less bytes than command
        // length has been received, will try to receive the rest next time
        debug.write(DRXTXD, "incomplete message, will wait for the rest.");
        // as it's incomplete - wait for new data
        unprocessed.setHasUnprocessed(false);
        unprocessed.setExpected(Data.PDU_HEADER_SIZE);
        messageIncompleteRetryCount++;
    } catch (UnknownCommandIdException e) {
        // message with invalid id was received, should send generic_nack
        debug.write(DRXTX, "unknown pdu, might remove from unprocessed buffer. CommandId=" + e.getCommandId());
        if (e.getCommandLength() <= unprocBuffer.length()) {
            // have already enough to remove
            try {
                unprocBuffer.removeBytes(e.getCommandLength());
            } catch (NotEnoughDataInByteBufferException e1) {
                // can't happen, we've checked it above
                throw new Error("Not enough data in buffer even if previously checked that there was enough.");
            }
            unprocessed.check();
            // caller will decide what to do
            throw e;
        }
        // discarded via an UnknownCommandIdException again).
        throw e;
    } catch (PDUException e) {
        // paolo@bulksms.com: safer to catch all other PDU exceptions and force
        // force a check() here - some exception in parsing should not be allowed
        // to leave ghost data in the Unprocessed buffer (even though this is now
        // less likely after improvements to PDU.createPDU()):
        unprocessed.check();
        throw e;
    }
    /* paolo@bulksms.com: concerned that this is too broad, and will
		   stop useful exceptions from being passed back up the call stack,
			so disabling for now:
		} catch (Exception e) {
			debug.write(DRXTX, "Exception catched: " + e.toString());
			StringWriter stringWriter = new StringWriter();
			PrintWriter printWriter = new PrintWriter(stringWriter);
			e.printStackTrace(printWriter);
			debug.write(DRXTX, stringWriter.toString());
		}
		*/
    if (pdu != null) {
        debug.write(DRXTX, "received complete pdu" + pdu.debugString());
        debug.write(DRXTX, "there is " + unprocBuffer.length() + " bytes left in unprocessed buffer");
    }
    // unprocessed.check();
    return pdu;
}