private void Listen(IPEndPoint localEndpoint)
{
_logger.Trace("Listen (sync) using local endpoint {0}", localEndpoint);
// create a socket
_listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// bind and listen
try
{
_listener.Bind(localEndpoint);
_listener.Listen(1);
// accept the next connection
bool completesAsynchronously = _listener.AcceptAsync(_socketOperation);
if (!completesAsynchronously)
{
SocketAsyncEventArgs_Completed(_socketOperation.AcceptSocket, _socketOperation);
}
}
catch (Exception ex)
{
// raise error event
var handlers = Error;
if (handlers != null)
{
var args = new NetworkErrorEventArgs("The listen operation failed: " + ex.ToString(), null, ex);
handlers(this, args);
}
}
}
private void SocketAsyncEventArgs_Completed(object sender, SocketAsyncEventArgs e)
{
_logger.Trace("Received Completed event from socket async event args");
// check for errors
if (e.SocketError != SocketError.Success)
{
_logger.Trace("Raising event Error with {0}", e.SocketError);
// raise error event
var handlers = Error;
if (handlers != null)
{
var message = string.Format("The last socket operation ({0}) failed.", e.LastOperation);
var args = new NetworkErrorEventArgs(message, e.SocketError.ToString(), null);
handlers(this, args);
}
return;
}
// check what has been executed
switch (e.LastOperation)
{
case SocketAsyncOperation.SendTo:
_logger.Trace("Raising event DataSent");
// raise event
var sentHandlers = DataSent;
if (sentHandlers != null)
{
sentHandlers(this, EventArgs.Empty);
}
break;
case SocketAsyncOperation.ReceiveFrom:
_logger.Trace("Raising event DataReceived");
// copy the received amount of data to separate array
var receivedBytes = new byte[e.BytesTransferred];
Array.Copy(e.Buffer, 0, receivedBytes, 0, e.BytesTransferred);
// raise event
var receivedHandlers = DataReceived;
if (receivedHandlers != null)
{
receivedHandlers(this, new DataReceivedEventArgs(receivedBytes));
}
break;
}
}
private void Socket_Error(object sender, NetworkErrorEventArgs e)
{
_logger.Trace("Raising Error event with message: {0}", e.Message);
// raise our own event
var handlers = Error;
if (handlers != null)
{
handlers(this, new NetworkErrorEventArgs(e.Message, e.ErrorCode, e.Error));
}
}
private void RaiseErrorEvent(NetworkErrorEventArgs e)
{
_logger.Trace("Raising Error event with message: {0}", e.Message);
// make sure we only raise events on the correct context
_synchronizationContext.Post(o =>
{
var handlers = Error;
if (handlers != null)
{
var exception = new PhoneControllerException("Networking error: " + e.Message, e.Error, e.ErrorCode);
handlers(this, new ErrorEventArgs(exception));
}
}, null);
}
private void DataChannel_Error(object sender, NetworkErrorEventArgs e)
{
_logger.Trace("Received Error event from data channel");
var state = State;
if (state == PhoneControllerState.Closed || state == PhoneControllerState.Closing || state == PhoneControllerState.Error)
{
// ignore follow-up errors after we're closed or already in error state
return;
}
State = PhoneControllerState.Error;
RaiseErrorEvent(e);
}
private void BroadCaster_TimeoutElapsed(object sender, EventArgs e)
{
lock (_locker)
{
_logger.Trace("Received TimeoutElapsed event from broadcaster");
var state = State;
// broadcasting is also possible from the closed state (during re-initialization)
// so we only check for the error state here
if (state == PhoneControllerState.Error)
{
// ignore follow-up errors after we're closed or already in error state
return;
}
State = PhoneControllerState.Error;
// create new error event args
var eventArgs = new NetworkErrorEventArgs("Timeout while broadcasting.", "TimeOut", null);
RaiseErrorEvent(eventArgs);
}
}
private void RaiseErrorEvent(NetworkErrorEventArgs e)
{
_logger.Trace("Raising event Error");
_synchronizationContext.Post(o =>
{
var handlers = Error;
if (handlers != null)
{
var exception = new PhoneControllerException("Networking error: " + e.Message, e.Error, e.ErrorCode);
handlers(this, new ErrorEventArgs(exception));
}
}, null);
}
private void SocketAsyncEventArgs_Completed(object sender, SocketAsyncEventArgs e)
{
_logger.Trace("Received Completed event from socket event args");
// check for errors
if (e.SocketError != SocketError.Success)
{
_logger.Trace("Raising event Error with code {0}", e.SocketError);
// raise error event
var handlers = Error;
if (handlers != null)
{
var message = string.Format("The last socket operation ({0}) failed.", e.LastOperation);
var args = new NetworkErrorEventArgs(message, e.SocketError.ToString(), null);
handlers(this, args);
}
return;
}
// check what has been executed
switch (e.LastOperation)
{
case SocketAsyncOperation.Connect:
// store connect socket
_currentSocket = e.ConnectSocket;
_logger.Trace("Raising event Connected");
// raise event
var connectedHandlers = Connected;
if (connectedHandlers != null)
{
connectedHandlers(this, EventArgs.Empty);
}
break;
case SocketAsyncOperation.Send:
// if zero bytes were transferred, the remote endpoint has closed the connection
if (e.BytesTransferred == 0)
{
RaiseConnectionClosedEvent();
break;
}
_logger.Trace("Raising event DataSent");
// raise event
var sentHandlers = DataSent;
if (sentHandlers != null)
{
sentHandlers(this, EventArgs.Empty);
}
break;
case SocketAsyncOperation.Receive:
// if zero bytes were transferred, the remote endpoint has closed the connection
if (e.BytesTransferred == 0)
{
RaiseConnectionClosedEvent();
break;
}
// copy the received amount of data to separate array
var receivedBytes = new byte[e.BytesTransferred];
Array.Copy(e.Buffer, 0, receivedBytes, 0, e.BytesTransferred);
_logger.Trace("Raising event DataReceived");
// raise event
var receivedHandlers = DataReceived;
if (receivedHandlers != null)
{
receivedHandlers(this, new DataReceivedEventArgs(receivedBytes));
}
break;
default:
OnUnknownOperationCompleted(sender, e);
break;
}
}