internal void EndAcceptControlConnection(IAsyncResult ar)
{
try {
string _filePath = (string)ar.AsyncState;
Socket _clientSocket = controlSocket.EndAccept(ar);
NetworkCommunicationManagers.Disconnect(controlSocket);
controlSocket = _clientSocket;
byte[] _buffer = packFileMetadata(_filePath);
NetworkCommunicationManagers.SendIntOverSocket(dataSocket, _buffer.Length);
NetworkCommunicationManagers.SendByteArrayOverSocket(dataSocket, _buffer);
fileTransferContainer.FileTransferClassInstance = this;
managedSendFileOverSockets(_filePath);
}
catch (Exception) {
NetworkCommunicationManagers.Disconnect(controlSocket);
NetworkCommunicationManagers.Disconnect(dataSocket);
lock (RunningTransfers) {
if (fileTransferContainer.status != FileTransferStatus.Cancelled)
{
fileTransferContainer.status = FileTransferStatus.Error;
}
}
return;
}
}
internal void EndAcceptDataConnection(IAsyncResult ar)
{
try {
port2 = NetworkCommunicationManagers.FindNextFreeTcpPort();
Socket _clientSocket = dataSocket.EndAccept(ar);
NetworkCommunicationManagers.Disconnect(dataSocket);
dataSocket = _clientSocket;
NetworkCommunicationManagers.SendIntOverSocket(_clientSocket, port2);
controlSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
controlSocket.Bind(new System.Net.IPEndPoint(System.Net.IPAddress.Any, port2));
controlSocket.Listen(1);
controlSocket.BeginAccept(new AsyncCallback(EndAcceptControlConnection), ar.AsyncState);
}
catch (Exception) {
NetworkCommunicationManagers.Disconnect(dataSocket);
lock (RunningTransfers) {
if (fileTransferContainer.status != FileTransferStatus.Cancelled)
{
fileTransferContainer.status = FileTransferStatus.Error;
}
}
return;
}
}
internal void managedSendFileOverSockets(string filePath)
{
fileTransferContainer.filePath = filePath;
short _count = 0;
const short _INITIAL = 5000;
Thread _thread = new Thread(() => monitorControlChannel());
_thread.Name = "Control Socket monitor for " + dataSocket.RemoteEndPoint.ToString();
_thread.IsBackground = true;
_thread.Start();
using (FileStream _fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) {
byte[] _fileBuffer = new byte[FILE_BUFFER_SIZE];
long _size = _fs.Length;
try {
long _index = 0;
//Send the initial chunk of data
while (dataSocket.Connected && controlSocket.Connected && _index < _size)
{
if (fileTransferContainer.status == FileTransferStatus.Paused)
{
resetEvent.WaitOne();
}
_fs.Position = _index;
int _read = _fs.Read(_fileBuffer, 0, _fileBuffer.Length);
try {
NetworkCommunicationManagers.SendIntOverSocket(dataSocket, _read);
if (_read != _fileBuffer.Length)
{
byte[] _temp = new byte[_read];
Buffer.BlockCopy(_fileBuffer, 0, _temp, 0, _read);
NetworkCommunicationManagers.SendByteArrayOverSocket(dataSocket, _temp);
}
else
{
NetworkCommunicationManagers.SendByteArrayOverSocket(dataSocket, _fileBuffer);
}
}
catch (SocketException) {
continue;
}
_index += _read;
_count++;
if (_count % 200 == 0)
{
lock (RunningTransfers) {
if (Math.Round(((((double)_index / _size) * 100) - fileTransferContainer.progress), 1) >= 0.1)
{
fileTransferContainer.progress = (float)Math.Round(((double)_index / _size) * 100, 1);
}
}
}
if (_count == _INITIAL)
{
_count = 0;
break;
}
}
//Send the remaining data
while (dataSocket.Connected && controlSocket.Connected && _index < _size)
{
_fs.Position = _index;
int _read = _fs.Read(_fileBuffer, 0, _fileBuffer.Length);
try {
NetworkCommunicationManagers.SendIntOverSocket(dataSocket, _read);
if (_read != _fileBuffer.Length)
{
byte[] _temp = new byte[_read];
Buffer.BlockCopy(_fileBuffer, 0, _temp, 0, _read);
NetworkCommunicationManagers.SendByteArrayOverSocket(dataSocket, _temp);
}
else
{
NetworkCommunicationManagers.SendByteArrayOverSocket(dataSocket, _fileBuffer);
}
}
catch (SocketException) {
continue;
}
_index += _read;
_count++;
if (_count % 200 == 0)
{
lock (RunningTransfers){
if (Math.Round(((((double)_index / _size) * 100) - fileTransferContainer.progress), 1) >= 0.1)
{
fileTransferContainer.progress = (float)Math.Round((((double)_index / _size) * 100), 1);
}
}
bool _wait = true;
while (true)
{
lock (syncObject) {
if (acknowledgedTransfers > 0)
{
acknowledgedTransfers--;
_wait = false;
break;
}
}
if (_wait)
{
Thread.Sleep(100);
}
}
}
}
if (_index == _size)
{
lock (RunningTransfers) {
fileTransferContainer.progress = 100;
fileTransferContainer.status = FileTransferStatus.Finished;
}
}
else
{
lock (RunningTransfers) {
if (fileTransferContainer.status != FileTransferStatus.Cancelled)
{
fileTransferContainer.status = FileTransferStatus.Error;
}
}
}
}
catch {
lock (RunningTransfers) {
if (fileTransferContainer.status != FileTransferStatus.Cancelled)
{
fileTransferContainer.status = FileTransferStatus.Error;
}
}
}
}
}
internal bool AcceptFileTransfer(Socket socket, int port1, MainWindow mainWindow)
{
int _port2;
SocketException _socketException;
if (!NetworkCommunicationManagers.ConnectToEndPoint(port1, socket.RemoteEndPoint.ToString().Remove(socket.RemoteEndPoint.ToString().LastIndexOf(':')), out dataSocket, out _socketException))
{
return(false);
}
NetworkCommunicationManagers.ReceiveIntOverSocket(dataSocket, out _port2);
if (!NetworkCommunicationManagers.ConnectToEndPoint(_port2, socket.RemoteEndPoint.ToString().Remove(socket.RemoteEndPoint.ToString().LastIndexOf(':')), out controlSocket, out _socketException))
{
return(false);
}
fileTransferContainer.FileTransferClassInstance = this;
byte[] _buffer = null;
int _temp;
long _size;
string _filename;
try {
NetworkCommunicationManagers.ReceiveIntOverSocket(dataSocket, out _temp);
NetworkCommunicationManagers.ReceiveByteArrayOverSocket(dataSocket, out _buffer, _temp);
}
catch (ObjectDisposedException) {
NetworkCommunicationManagers.Disconnect(dataSocket);
NetworkCommunicationManagers.Disconnect(controlSocket);
return(false);
}
catch (SocketException) {
NetworkCommunicationManagers.Disconnect(dataSocket);
NetworkCommunicationManagers.Disconnect(controlSocket);
return(false);
}
unpackFileMetadata(_buffer, out _filename, out _size);
fileTransferContainer.fileName = _filename;
fileTransferContainer.sizeInBytes = _size;
fileTransferContainer.size = Converters.DataConverter.bytesToReadableString(_size);
if (_size > mainWindow.maxAcceptedFileSizeWithoutConfirmation)
{
ManualResetEvent _replyRecieved = new ManualResetEvent(false);
System.Windows.MessageBoxResult _continue = System.Windows.MessageBoxResult.No;
mainWindow.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => {
Thread.Sleep(1000);
_continue = System.Windows.MessageBox.Show("Receive file \"" + _filename + "\" from " + socket.RemoteEndPoint.ToString().Remove(socket.RemoteEndPoint.ToString().LastIndexOf(':')) + " (Size: " + _size + " bytes)", "File Transfer", System.Windows.MessageBoxButton.YesNo);
_replyRecieved.Set();
}));
_replyRecieved.WaitOne();
_replyRecieved.Dispose();
if (_continue != System.Windows.MessageBoxResult.Yes)
{
mainWindow.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => {
lock (RunningTransfers) {
RunningTransfers.Remove(fileTransferContainer);
}
}));
NetworkCommunicationManagers.Disconnect(dataSocket);
NetworkCommunicationManagers.Disconnect(controlSocket);
return(false);
}
}
if (!Directory.Exists(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads", "ChatApp")))
{
Directory.CreateDirectory(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads", "ChatApp"));
}
;
string _filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads", "ChatApp", _filename);
if (File.Exists(_filePath))
{
string _extension, _assignedFilename;
if (_filename.LastIndexOf('.') == -1)
{
_extension = "";
_assignedFilename = _filename;
}
else
{
_extension = "." + _filename.Remove(0, _filename.LastIndexOf('.') + 1);
_assignedFilename = _filename.Remove(_filename.Length - _extension.Length, _extension.Length);
}
for (int i = 0; true; i++)
{
_filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads", "ChatApp", _assignedFilename + "(" + i + ")" + _extension);
if (!File.Exists(_filePath))
{
break;
}
}
}
fileTransferContainer.filePath = _filePath;
return(managedReceiveFileOverSockets(_filePath, _size));
}
internal bool managedReceiveFileOverSockets(string filePath, long length)
{
short _count = 0;
long _index = 0;
int _size = 1;
Thread _thread = new Thread(() => monitorControlChannel());
_thread.Name = "Control Socket monitor for " + dataSocket.RemoteEndPoint.ToString();
_thread.IsBackground = true;
_thread.Start();
try {
using (FileStream _fs = new FileStream(filePath + ".temp", FileMode.CreateNew)) {
_fs.SetLength(length);
byte[] _buffer;
while (dataSocket.Connected && controlSocket.Connected && _index < length)
{
if (fileTransferContainer.status == FileTransferStatus.Paused)
{
resetEvent.WaitOne();
}
if (!NetworkCommunicationManagers.ReceiveIntOverSocket(dataSocket, out _size))
{
continue;
}
;
_buffer = new byte[_size];
if (!NetworkCommunicationManagers.ReceiveByteArrayOverSocket(dataSocket, out _buffer, _size))
{
continue;
}
;
_fs.Position = _index;
_fs.Write(_buffer, 0, _buffer.Length);
_index += _size;
_count++;
if (_count % 200 == 0)
{
lock (RunningTransfers) {
if (Math.Round(((((double)_index / length) * 100) - fileTransferContainer.progress), 1) >= 0.1)
{
fileTransferContainer.progress = (float)Math.Round((((double)_index / length) * 100), 1);
}
}
_count = 0;
ThreadPool.QueueUserWorkItem(state => {
lock (controlSocket) {
NetworkCommunicationManagers.SendByteArrayOverSocket(controlSocket, new byte[] { (byte)FileTransferCommands.BlockTransferred });
}
});
}
}
}
lock (controlSocket) {
NetworkCommunicationManagers.SendByteArrayOverSocket(controlSocket, new byte[] { (byte)FileTransferCommands.EndTransfer });
}
}
catch (ObjectDisposedException) {
NetworkCommunicationManagers.Disconnect(controlSocket);
NetworkCommunicationManagers.Disconnect(dataSocket);
}
catch (SocketException) {
NetworkCommunicationManagers.Disconnect(controlSocket);
NetworkCommunicationManagers.Disconnect(dataSocket);
}
if (_index < length)
{
try {
File.Delete(filePath + ".temp");
}
catch { }
lock (RunningTransfers) {
if (fileTransferContainer.status != FileTransferStatus.Cancelled)
{
fileTransferContainer.status = FileTransferStatus.Error;
}
}
return(false);
}
else
{
try {
File.Move(filePath + ".temp", filePath);
}
catch (IOException) {
try {
File.Delete(filePath + ".temp");
}
catch { }
}
lock (RunningTransfers) {
fileTransferContainer.status = FileTransferStatus.Finished;
fileTransferContainer.progress = 100;
}
}
return(true);
}
internal void monitorControlChannel()
{
try {
byte[] arr;
FileTransferCommands _command;
while (controlSocket.Connected)
{
if (!NetworkCommunicationManagers.ReceiveByteArrayOverSocket(controlSocket, out arr, 1))
{
continue;
}
_command = (FileTransferCommands)arr[0];
switch (_command)
{
case FileTransferCommands.BlockTransferred:
lock (syncObject) {
acknowledgedTransfers++;
}
break;
case FileTransferCommands.EndTransfer:
NetworkCommunicationManagers.Disconnect(controlSocket);
NetworkCommunicationManagers.Disconnect(dataSocket);
return;
case FileTransferCommands.Pause:
lock (RunningTransfers) {
fileTransferContainer.status = FileTransferStatus.Paused;
if (fileTransferContainer.pausedBy == PausedBy.None)
{
fileTransferContainer.pausedBy = PausedBy.OtherPeer;
}
else if (fileTransferContainer.pausedBy == PausedBy.User)
{
fileTransferContainer.pausedBy = PausedBy.Both;
}
}
ThreadPool.QueueUserWorkItem(state => {
lock (controlSocket) {
NetworkCommunicationManagers.SendByteArrayOverSocket(controlSocket, new byte[] { (byte)FileTransferCommands.PauseOrResumeRequestReceived });
}
});
break;
case FileTransferCommands.PauseOrResumeRequestReceived:
lock (RunningTransfers) {
if (fileTransferContainer.transferType == FileTransferType.Upload)
{
if (fileTransferContainer.status == FileTransferStatus.Paused && fileTransferContainer.pausedBy == PausedBy.None)
{
fileTransferContainer.status = FileTransferStatus.Running;
resetEvent.Set();
}
}
else if (fileTransferContainer.transferType == FileTransferType.Download)
{
if (fileTransferContainer.pausedBy != PausedBy.None && fileTransferContainer.status == FileTransferStatus.Running)
{
fileTransferContainer.status = FileTransferStatus.Paused;
}
}
}
break;
case FileTransferCommands.Resume:
lock (RunningTransfers) {
if (fileTransferContainer.pausedBy == PausedBy.OtherPeer)
{
fileTransferContainer.pausedBy = PausedBy.None;
fileTransferContainer.status = FileTransferStatus.Running;
resetEvent.Set();
}
else if (fileTransferContainer.pausedBy == PausedBy.Both)
{
fileTransferContainer.pausedBy = PausedBy.User;
}
ThreadPool.QueueUserWorkItem(state => {
lock (controlSocket) {
NetworkCommunicationManagers.SendByteArrayOverSocket(controlSocket, new byte[] { (byte)FileTransferCommands.PauseOrResumeRequestReceived });
}
});
}
break;
}
}
}
catch (ObjectDisposedException) {}
catch (SocketException) {}
finally {
NetworkCommunicationManagers.Disconnect(controlSocket);
NetworkCommunicationManagers.Disconnect(dataSocket);
}
}
