protected void smWaitCloseResponse()
{
int bytesRead = 0;
this.posHeaderEOF = 0;
this.bytesInBuffer = 0;
if (this.socket.Poll(this.waitCloseMsgTimeout, SelectMode.SelectRead) == true && this.socket.Available > 0)
{
do
{
bytesRead = this.socketStream.Read(this.receiveBuffer, this.bytesInBuffer, this.receiveBuffer.Length - this.bytesInBuffer);
if (bytesRead > 0)
{
this.bytesInBuffer += bytesRead;
if (WSFrame.TryParse(this.receiveBuffer, 0, this.bytesInBuffer, this.options.MaxReceiveFrameLength, out this.lastRcvdFrame) == true)
{
// remove data-frame from buffer
Array.Copy(this.receiveBuffer, this.lastRcvdFrame.FrameData.Length, this.receiveBuffer, 0, this.bytesInBuffer - this.lastRcvdFrame.FrameData.Length);
this.bytesInBuffer = this.bytesInBuffer - this.lastRcvdFrame.FrameData.Length;
// check for close frame
if (this.lastRcvdFrame.OpCode == WSFrameType.Close)
{
this.LogBufferContent("Close frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
this.subState = SubState.CloseTcpConnection;
return;
}
this.LogBufferContent("Data frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
}
}
}while (this.socket.Available > 0 && this.bytesInBuffer < this.receiveBuffer.Length);
}
Logger.WriteError(this.loggerID, "Close frame not received.");
this.subState = SubState.Failed;
}
protected void smReceive()
{
int bytesRead = 0;
this.lastRcvdFrame = null;
// start activity timer
if (this.activityTimerEnabled)
{
this.activityTimer.Start(this.waitActivityTimeout, ActivityTimerState.WaitingForMessage);
}
while (this.State == WebSocketState.Connected)
{
// process data in buffer
if (this.bytesInBuffer > 0)
{
if (WSFrame.TryParse(this.receiveBuffer, 0, this.bytesInBuffer, this.options.MaxReceiveFrameLength, out this.lastRcvdFrame) == true)
{
// restart activity timer
if (this.activityTimerEnabled)
{
this.activityTimer.Restart(ActivityTimerState.WaitingForMessage);
}
// remove data-frame from buffer
Array.Copy(this.receiveBuffer, this.lastRcvdFrame.FrameData.Length, this.receiveBuffer, 0, this.bytesInBuffer - this.lastRcvdFrame.FrameData.Length);
this.bytesInBuffer = this.bytesInBuffer - this.lastRcvdFrame.FrameData.Length;
// take action based on opcode
switch (this.lastRcvdFrame.OpCode)
{
case WSFrameType.Continuation:
// TODO - implement continuation frames
break;
case WSFrameType.Text:
this.LogBufferContent("Text frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
this.OnTextReceived(this.lastRcvdFrame.PayloadText);
break;
case WSFrameType.Binary:
this.LogBufferContent("Data frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
this.OnDataReceived(this.lastRcvdFrame.PayloadBytes);
break;
case WSFrameType.Close:
this.LogBufferContent("Close frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
// based on RFC6455 we must stop sending and receiving messages after Close response is sent
this.activityTimer.Stop();
this.state = WebSocketState.Disconnecting;
this.subState = SubState.CloseTcpConnection;
this.smSendCloseResponse();
return;
case WSFrameType.Ping:
this.LogBufferContent("Ping frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
this.smSendPongMessage();
break;
case WSFrameType.Pong:
this.LogBufferContent("Pong frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
// no need to do anything
break;
default:
this.LogBufferContent("Unknown frame received: ", this.lastRcvdFrame.FrameData, 0, this.lastRcvdFrame.FrameData.Length);
break;
}
}
}
// send queued messages
if (this.DequeueAndSendMessages() && this.activityTimerEnabled)
{
this.activityTimer.Restart(ActivityTimerState.MessageSent);
}
// get more data
if (this.socket.Poll(this.waitReceiveTimeout, SelectMode.SelectRead) == true && this.socket.Available > 0)
{
bytesRead = this.socketStream.Read(this.receiveBuffer, this.bytesInBuffer, this.receiveBuffer.Length - this.bytesInBuffer);
this.bytesInBuffer += bytesRead;
continue;
}
// check activity timer
if (this.activityTimer.HasTimedOut)
{
switch ((ActivityTimerState)this.activityTimer.State)
{
case ActivityTimerState.MessageSent:
case ActivityTimerState.WaitingForMessage:
this.smSendPingMessage();
activityTimer.Restart(ActivityTimerState.WaitingForPingResponse);
break;
case ActivityTimerState.WaitingForPingResponse:
Logger.WriteError(this.loggerID, string.Concat("Ping response timed out."));
activityTimer.Stop();
this.state = WebSocketState.Disconnecting;
this.subState = SubState.CloseTcpConnection;
break;
}
}
}
}