boolean receiveFile = true, closed;
int transferMode = TFTP.BINARY_MODE, argc;
String arg, hostname, localFilename, remoteFilename;
TFTPClient tftp;
// Parse options
for (argc = 0; argc < args.length; argc++)
{
arg = args[argc];
if (arg.startsWith("-"))
{
if (arg.equals("-r"))
receiveFile = true;
else if (arg.equals("-s"))
receiveFile = false;
else if (arg.equals("-a"))
transferMode = TFTP.ASCII_MODE;
else if (arg.equals("-b"))
transferMode = TFTP.BINARY_MODE;
else
{
System.err.println("Error: unrecognized option.");
System.err.print(USAGE);
System.exit(1);
}
}
else
break;
}
// Make sure there are enough arguments
if (args.length - argc != 3)
{
System.err.println("Error: invalid number of arguments.");
System.err.print(USAGE);
System.exit(1);
}
// Get host and file arguments
hostname = args[argc];
localFilename = args[argc + 1];
remoteFilename = args[argc + 2];
// Create our TFTP instance to handle the file transfer.
tftp = new TFTPClient();
// We want to timeout if a response takes longer than 60 seconds
tftp.setDefaultTimeout(60000);
// Open local socket
try
{
tftp.open();
}
catch (SocketException e)
{
System.err.println("Error: could not open local UDP socket.");
System.err.println(e.getMessage());
System.exit(1);
}
// We haven't closed the local file yet.
closed = false;
// If we're receiving a file, receive, otherwise send.
if (receiveFile)
{
FileOutputStream output = null;
File file;
file = new File(localFilename);
// If file exists, don't overwrite it.
if (file.exists())
{
System.err.println("Error: " + localFilename + " already exists.");
System.exit(1);
}
// Try to open local file for writing
try
{
output = new FileOutputStream(file);
}
catch (IOException e)
{
tftp.close();
System.err.println("Error: could not open local file for writing.");
System.err.println(e.getMessage());
System.exit(1);
}
// Try to receive remote file via TFTP
try
{
tftp.receiveFile(remoteFilename, transferMode, output, hostname);
}
catch (UnknownHostException e)
{
System.err.println("Error: could not resolve hostname.");
System.err.println(e.getMessage());
System.exit(1);
}
catch (IOException e)
{
System.err.println(
"Error: I/O exception occurred while receiving file.");
System.err.println(e.getMessage());
System.exit(1);
}
finally
{
// Close local socket and output file
tftp.close();
try
{
output.close();
closed = true;
}
catch (IOException e)
{
closed = false;
System.err.println("Error: error closing file.");
System.err.println(e.getMessage());
}
}
if (!closed)
System.exit(1);
}
else
{
// We're sending a file
FileInputStream input = null;
// Try to open local file for reading
try
{
input = new FileInputStream(localFilename);
}
catch (IOException e)
{
tftp.close();
System.err.println("Error: could not open local file for reading.");
System.err.println(e.getMessage());
System.exit(1);
}
// Try to send local file via TFTP
try
{
tftp.sendFile(remoteFilename, transferMode, input, hostname);
}
catch (UnknownHostException e)
{
System.err.println("Error: could not resolve hostname.");
System.err.println(e.getMessage());
System.exit(1);
}
catch (IOException e)
{
System.err.println(
"Error: I/O exception occurred while sending file.");
System.err.println(e.getMessage());
System.exit(1);
}
finally
{
// Close local socket and input file
tftp.close();
try
{
input.close();
closed = true;
}
catch (IOException e)
{
closed = false;
System.err.println("Error: error closing file.");
System.err.println(e.getMessage());
}
}
if (!closed)
System.exit(1);
}
