/**
* Gets the packet.
*
* @return the packet
* @throws InterruptedIOException the interrupted io exception
* @throws SocketException the socket exception
* @throws IOException Signals that an I/O exception has occurred.
* @throws TFTPPacketException the tFTP packet exception
*/
private TFTPPacket getPacket()
throws InterruptedIOException, SocketException, IOException, TFTPPacketException {
long maxTime = System.currentTimeMillis() + receiveTimeout * 1000;
while (true) {
TFTPPacket packet = tftp.bufferedReceive();
if (packet.getAddress().equals(requestPacket.getAddress())
&& packet.getPort() == requestPacket.getPort()) {
return packet;
}
if (System.currentTimeMillis() > maxTime) {
throw new SocketTimeoutException();
}
}
}
/*
* (non-Javadoc)
*
* @see java.lang.Thread#run()
*/
@Override
public void run() {
while (requestPacket == null) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
status = Status.ERROR;
return;
}
if (checkTimeout()) {
return;
}
}
status = Status.RUNNING;
tftp = new TFTP();
tftp.beginBufferedOps();
tftp.setDefaultTimeout(receiveTimeout * 1000);
try {
tftp.open();
} catch (SocketException e) {
status = Status.ERROR;
return;
}
TFTPPacket packet = requestPacket;
TFTPAckPacket ackPacket = new TFTPAckPacket(packet.getAddress(), packet.getPort(), 0);
while (packet instanceof TFTPWriteRequestPacket) {
try {
tftp.bufferedSend(ackPacket);
packet = this.getPacket();
} catch (Exception e) {
}
if (checkTimeout()) {
return;
}
}
int lastBlock = 0;
while (packet instanceof TFTPDataPacket) {
TFTPDataPacket dataPacket = (TFTPDataPacket) packet;
int block = dataPacket.getBlockNumber();
if (block > lastBlock || (lastBlock == 65535 && block == 0)) {
try {
buffer.write(
dataPacket.getData(), dataPacket.getDataOffset(), dataPacket.getDataLength());
} catch (IOException e) {
status = Status.ERROR;
return;
}
}
ackPacket = new TFTPAckPacket(requestPacket.getAddress(), requestPacket.getPort(), block);
try {
tftp.bufferedSend(ackPacket);
} catch (IOException e) {
}
if (dataPacket.getDataLength() < TFTPDataPacket.MAX_DATA_LENGTH) {
this.status = Status.FINISHED;
for (int i = 0; i < 3; i++) {
try {
packet = this.getPacket();
tftp.bufferedSend(ackPacket);
} catch (Exception e) {
return;
}
}
}
try {
packet = this.getPacket();
} catch (Exception e) {
}
if (checkTimeout()) {
return;
}
}
status = Status.ERROR;
tftp.close();
}