private bool ProcessError(SocketException ex, EndPoint bufferEndPoint)
{
switch (ex.SocketErrorCode)
{
#if UNITY_IOS && !UNITY_EDITOR
case SocketError.NotConnected:
#endif
case SocketError.Interrupted:
case SocketError.NotSocket:
return(true);
case SocketError.ConnectionReset:
case SocketError.MessageSize:
case SocketError.TimedOut:
NetDebug.Write(NetLogLevel.Trace, "[R]Ignored error: {0} - {1}",
(int)ex.SocketErrorCode, ex.ToString());
break;
default:
NetDebug.WriteError("[R]Error code: {0} - {1}", (int)ex.SocketErrorCode,
ex.ToString());
_listener.OnMessageReceived(null, 0, ex.SocketErrorCode, (IPEndPoint)bufferEndPoint);
break;
}
return(false);
}
void ServerListen()
{
try
{
listener = new TcpListener(IPAddress.Parse(IP), port);
listener.Start();
Debug.Log("Server on IP: " + IP + " : : Listening for client on port: " + port);
Byte[] bytes = new Byte[1024];
while (true)
{
using (client = listener.AcceptTcpClient())
{
Debug.Log("Connected to: " + client);
using (NetworkStream stream = client.GetStream())
{
int length;
while ((length = stream.Read(bytes, 0, bytes.Length)) != 0)
{
var data = new byte[length];
Array.Copy(bytes, 0, data, 0, length);
string message = Encoding.ASCII.GetString(data);
Decode(message);
}
}
}
}
}
catch (SocketException SocketException)
{ Debug.Log("Socket exception " + SocketException.ToString()); }
}
// Receive thread
private void ReceiveData()
{
receivingClient = new UdpClient(localPort);
receivingClient.Client.ReceiveTimeout = 500;
while (true)
{
try
{
IPEndPoint anyIP = new IPEndPoint(IPAddress.Any, 0);
bytePacket = receivingClient.Receive(ref anyIP);
receivedEndPoint = anyIP;
dataReceived = true;
}
catch (Exception err)
{
SocketException sockErr = (SocketException)err; //CAUSES AN ERROR ON QUIT
if (sockErr.ErrorCode != 10060)
{
Debug.Log("Error receiving packet: " + sockErr.ToString());
messageLogger.messageReceived("Error receiving packet: " + sockErr.ToString());
}
}
}
}
internal void OnDnsError(Exception ex)
{
//
// Socket exceptions can get thrown due to clients getting closed, sockets being dropped, all kinds of issues
// So during runtime, almost entirely noise
//
SocketException se = ex as SocketException;
if (se != null)
{
if (m_logger.IsTraceEnabled)
{
m_logger.Error("Socket Error {0}", se.ToString());
}
return;
}
m_logger.Error("Dns Server {0}", ex.ToString());
}
private void CloseOrLogSocketException(SocketState state, SocketException sockEx)
{
SocketError errorCode = (SocketError)sockEx.ErrorCode;
switch (errorCode)
{
case SocketError.Shutdown:
case SocketError.ConnectionAborted:
case SocketError.ConnectionReset:
case SocketError.Disconnecting:
case SocketError.NetworkDown:
case SocketError.NetworkUnreachable:
case SocketError.NetworkReset:
Close(state.Client, $"{nameof(SocketException)} ErrorCode: {errorCode}");
break;
default:
Logger.Error(sockEx.ToString());
Close(state.Client, $"{nameof(SocketException)} ErrorCode: {errorCode}");
break;
}
}
/// <summary>
/// Method HandleSocketException.
/// </summary>
/// <param name="e">Instance of SocketException.</param>
private void HandleSocketException(SocketException e)
{
if (e.ErrorCode == (int)SocketError.ConnectionReset)
{
this.RaiseEvent(this.Disconnected, this._token);
}
Debug.WriteLine(string.Format(AsyncSocketClientConstants.ExceptionStringFormat, "DevLib.Net.AsyncSocket.AsyncSocketClient.HandleSocketException", e.Source, e.Message, e.StackTrace, e.ToString()));
this.OnErrorOccurred(this._token.Socket, new AsyncSocketErrorEventArgs(e.Message, e));
}
public void SplashPresenter_StartApplication_Picks_Up_SocketExceptions_When_Starting_WebServer()
{
var exception = new SocketException();
_WebServer.SetupSet(s => s.Online = true).Callback(() => {
throw exception;
});
_WebServer.Setup(a => a.Port).Returns(123);
_Presenter.Initialise(_View.Object);
_Presenter.StartApplication();
_Log.Verify(g => g.WriteLine("Caught exception when starting web server: {0}", exception.ToString()), Times.Once());
_View.Verify(v => v.ReportProblem(String.Format(Strings.CannotStartWebServerFull, 123), Strings.CannotStartWebServerTitle, false), Times.Once());
_View.Verify(v => v.ReportProblem(Strings.SuggestUseDifferentPortFull, Strings.SuggestUseDifferentPortTitle, false), Times.Once());
}
/// <summary>
/// Event triggered if a network error occurs while communicating with
/// the LoginServer.
/// </summary>
/// <param name="Exception"></param>
private void m_LoginClient_OnNetworkError(SocketException Exc)
{
MessageBox.Show(Exc.ToString());
Application.Exit();
}
/// <summary>
/// Queue the send to the Socket buffer with no further delay.
/// </summary>
/// <param name="buffer"></param>
/// <param name="length"></param>
/// <param name="s"></param>
private void SendNow(SendParameters sendItem)
{
Synchronizer.AssertLockIsHeld(m_SendQueue);
AsyncCallback ac = new AsyncCallback(SendCallback);
Socket s = null;
while (true)
{
try {
s = null;
using (Synchronizer.Lock(this.m_SocketMap)) {
if (m_SocketMap.ContainsKey(sendItem.Id))
{
s = (Socket)m_SocketMap[sendItem.Id];
}
else
{
//I believe this should never happen.
Debug.Assert(false, "TCPServerSender.SendNow thinks there is a missing socket map entry for client id: " + sendItem.Id.ToString());
}
}
using (Synchronizer.Lock(m_SendingParticipants)) {
if (m_SendingParticipants.ContainsKey(sendItem.Id))
{
((ReferenceCounter)m_SendingParticipants[sendItem.Id]).Increment();
}
else
{
m_SendingParticipants.Add(sendItem.Id, new ReferenceCounter());
}
++m_PendingOutboundMessageCount;
s.BeginSend(sendItem.Buffer, 0, sendItem.Length, SocketFlags.None, ac, new SendState(s, sendItem)); //BeginSend won't block.
}
break;
}
catch (Exception e) {
using (Synchronizer.Lock(m_SendingParticipants)) {
if (m_SendingParticipants.ContainsKey(sendItem.Id))
{
((ReferenceCounter)m_SendingParticipants[sendItem.Id]).Decrement();
}
--m_PendingOutboundMessageCount;
Debug.Assert(m_PendingOutboundMessageCount >= 0, "TCPServerSender.SendNow found negative pending message count");
}
if (e is SocketException)
{
SocketException se = (SocketException)e;
if (se.ErrorCode == 10055)
{
//Note that this shouldn't happen since we manually control the queue length.
Trace.WriteLine("!!!Server Send queue is full. Sleeping 50 mS", this.GetType().ToString());
Thread.Sleep(50); //Note that sleeping here could cause various bad performance because other threads may be waiting on us..
}
else
{
Trace.WriteLine("Send socket exception: " + se.ToString() + " Error code: " + se.ErrorCode.ToString(), this.GetType().ToString());
this.DisableClient(sendItem.Id);
break;
}
}
else if (e is ObjectDisposedException)
{
ObjectDisposedException ode = (ObjectDisposedException)e;
this.DisableClient(sendItem.Id);
Trace.WriteLine(ode.Message, this.GetType().ToString());
break;
}
else
{
Trace.WriteLine(e.ToString(), this.GetType().ToString());
break;
}
}
}
}
/// <summary>
/// Event triggered if a network error occurs while communicating with
/// the LoginServer.
/// </summary>
/// <param name="Exception"></param>
private static void m_LoginClient_OnNetworkError(SocketException Exc)
{
Console.WriteLine(Exc.ToString());
Console.ReadLine();
Environment.Exit(0);
}
/// <summary>
/// Socket异常
/// </summary>
/// <param name="e">Instance of SocketException.</param>
private void HandleSocketException(SocketException e)
{
if (e.ErrorCode == (int)SocketError.ConnectionReset || e.ErrorCode == (int)SocketError.ConnectionRefused || e.ErrorCode == (int)SocketError.TimedOut || e.ErrorCode < -1)
{
IsConnected = false;
this.RaiseEvent(this.Disconnected, this.token);
}
if (debug)
{
Debug.Write(string.Format(errorFormat, "AsyncSocketClient.HandleSocketException", e.Source, e.Message, e.StackTrace, e.ToString()));
}
this.OnError(this.token.Socket, new AsyncSocketErrorEventArgs(e.Message, e));
}
/// <summary>
/// Processes actually the HTTP Request.
/// </summary>
/// <remarks>Documented by Dev10, 2008-08-07</remarks>
public void Process()
{
myReadBuffer = new byte[client.ReceiveBufferSize];
String myCompleteMessage = "";
int numberOfBytesRead = 0;
#if DEBUG && debug_output
Debug.WriteLine("Connection accepted. Buffer: " + client.ReceiveBufferSize.ToString());
#endif
NetworkStream ns = client.GetStream();
string hValue = "";
string hKey = "";
try
{
// binary data buffer index
int bfndx = 0;
// Incoming message may be larger than the buffer size.
do
{
numberOfBytesRead = ns.Read(myReadBuffer, 0, myReadBuffer.Length);
myCompleteMessage =
String.Concat(myCompleteMessage, Encoding.ASCII.GetString(myReadBuffer, 0, numberOfBytesRead));
// read buffer index
int ndx = 0;
do
{
switch (ParserState)
{
case RState.METHOD:
if (myReadBuffer[ndx] != ' ')
{
HTTPRequest.Method += (char)myReadBuffer[ndx++];
}
else
{
ndx++;
ParserState = RState.URL;
}
break;
case RState.URL:
if (myReadBuffer[ndx] == '?')
{
ndx++;
hKey = "";
HTTPRequest.Execute = true;
HTTPRequest.Args = new Hashtable();
ParserState = RState.URLPARM;
}
else if (myReadBuffer[ndx] != ' ')
{
HTTPRequest.URL += (char)myReadBuffer[ndx++];
}
else
{
ndx++;
HTTPRequest.URL = Uri.UnescapeDataString(HTTPRequest.URL);
ParserState = RState.VERSION;
}
break;
case RState.URLPARM:
if (myReadBuffer[ndx] == '=')
{
ndx++;
hValue = "";
ParserState = RState.URLVALUE;
}
else if (myReadBuffer[ndx] == ' ')
{
ndx++;
HTTPRequest.URL = Uri.UnescapeDataString(HTTPRequest.URL);
ParserState = RState.VERSION;
}
else
{
hKey += (char)myReadBuffer[ndx++];
}
break;
case RState.URLVALUE:
if (myReadBuffer[ndx] == '&')
{
ndx++;
hKey = Uri.UnescapeDataString(hKey);
hValue = Uri.UnescapeDataString(hValue);
HTTPRequest.Args[hKey] = HTTPRequest.Args[hKey] != null ? HTTPRequest.Args[hKey] + ", " + hValue : hValue;
hKey = "";
ParserState = RState.URLPARM;
}
else if (myReadBuffer[ndx] == ' ')
{
ndx++;
hKey = Uri.UnescapeDataString(hKey);
hValue = Uri.UnescapeDataString(hValue);
HTTPRequest.Args[hKey] = HTTPRequest.Args[hKey] != null ? HTTPRequest.Args[hKey] + ", " + hValue : hValue;
HTTPRequest.URL = Uri.UnescapeDataString(HTTPRequest.URL);
ParserState = RState.VERSION;
}
else
{
hValue += (char)myReadBuffer[ndx++];
}
break;
case RState.VERSION:
if (myReadBuffer[ndx] == '\r')
{
ndx++;
}
else if (myReadBuffer[ndx] != '\n')
{
HTTPRequest.Version += (char)myReadBuffer[ndx++];
}
else
{
ndx++;
hKey = "";
HTTPRequest.Headers = new Hashtable();
ParserState = RState.HEADERKEY;
}
break;
case RState.HEADERKEY:
if (myReadBuffer[ndx] == '\r')
{
ndx++;
}
else if (myReadBuffer[ndx] == '\n')
{
ndx++;
if (HTTPRequest.Headers["Content-Length"] != null)
{
HTTPRequest.BodySize = Convert.ToInt32(HTTPRequest.Headers["Content-Length"]);
this.HTTPRequest.BodyData = new byte[this.HTTPRequest.BodySize];
ParserState = RState.BODY;
}
else
{
ParserState = RState.OK;
}
}
else if (myReadBuffer[ndx] == ':')
{
ndx++;
}
else if (myReadBuffer[ndx] != ' ')
{
hKey += (char)myReadBuffer[ndx++];
}
else
{
ndx++;
hValue = "";
ParserState = RState.HEADERVALUE;
}
break;
case RState.HEADERVALUE:
if (myReadBuffer[ndx] == '\r')
{
ndx++;
}
else if (myReadBuffer[ndx] != '\n')
{
hValue += (char)myReadBuffer[ndx++];
}
else
{
ndx++;
if (!HTTPRequest.Headers.ContainsKey(hKey))
{
HTTPRequest.Headers.Add(hKey, hValue);
}
hKey = "";
ParserState = RState.HEADERKEY;
}
break;
case RState.BODY:
// Append to request BodyData
Array.Copy(myReadBuffer, ndx, this.HTTPRequest.BodyData, bfndx, numberOfBytesRead - ndx);
bfndx += numberOfBytesRead - ndx;
ndx = numberOfBytesRead;
if (this.HTTPRequest.BodySize <= bfndx)
{
ParserState = RState.OK;
}
break;
default:
ndx++;
break;
}
}while (ndx < numberOfBytesRead);
}while (ns.DataAvailable);
#if DEBUG && debug_output
// Print out the received message to the console.
Debug.WriteLine("Media server received request: " + Environment.NewLine +
myCompleteMessage);
#endif
//Build up the HTTPResponse
HTTPResponse.version = "HTTP/1.1";
if (ParserState != RState.OK)
{
HTTPResponse.status = (int)RespState.BAD_REQUEST;
}
else
{
HTTPResponse.status = (int)RespState.OK;
}
this.HTTPResponse.Headers = new Hashtable();
this.HTTPResponse.Headers.Add("Server", Parent.Name);
this.HTTPResponse.Headers.Add("Date", DateTime.Now.ToString("r"));
this.HTTPResponse.Headers.Add("Cache-Control", "no-cache");
this.HTTPResponse.Headers.Add("Pragma", "no-cache");
this.HTTPResponse.Headers.Add("Expires", "-1");
#if DEBUG && debug_output
//Call the overriden SubClass Method to complete the HTTPResponse Content
Debug.WriteLine("Preparing reponse.");
#endif
this.Parent.OnResponse(ref this.HTTPRequest, ref this.HTTPResponse);
//Create the Header String
string HeadersString = this.HTTPResponse.version + " " + this.Parent.respStatus[this.HTTPResponse.status] + "\r\n";
foreach (DictionaryEntry Header in this.HTTPResponse.Headers)
{
HeadersString += Header.Key + ": " + Header.Value + "\r\n";
}
HeadersString += "\r\n";
byte[] bHeadersString = Encoding.ASCII.GetBytes(HeadersString);
#if DEBUG && debug_output
// Send headers
Debug.WriteLine("Response headers: " + Environment.NewLine + HeadersString);
#endif
ns.Write(bHeadersString, 0, bHeadersString.Length);
ns.Flush();
// Send body (File)
if (this.HTTPResponse.mediaStream != null)
{
using (this.HTTPResponse.mediaStream)
{
byte[] b = new byte[client.SendBufferSize];
int bytesRead;
int totalBytes = 0;
int totalLength = Convert.ToInt32(this.HTTPResponse.mediaStream.Length);
while ((bytesRead = this.HTTPResponse.mediaStream.Read(b, 0, b.Length)) > 0)
{
ns.Write(b, 0, bytesRead);
totalBytes += bytesRead;
#if DEBUG && debug_output
Debug.WriteLine(string.Format("Sent {0:0,0} / {1:0,0} KBytes ({2:0.0%}).",
1.0 * totalBytes / 1024, 1.0 * totalLength / 1024, 1.0 * totalBytes / totalLength));
#endif
}
ns.Flush();
this.HTTPResponse.mediaStream.Close();
}
}
}
catch (Exception e)
{
if (e is WebException)
{
Trace.WriteLine("A Webexception in CsHTTPRequest was thrown. URI: " + ((WebException)e).Response.ResponseUri.ToString() + Environment.NewLine + e.ToString());
}
else
{
Trace.WriteLine("An Exception in CsHTTPRequest was thrown: " + e.ToString());
}
if (e.InnerException != null && e.InnerException is SocketException)
{
SocketException se = ((SocketException)e.InnerException);
Trace.WriteLine("Socket exception: " + se.ToString());
Trace.WriteLine("Error code: " + se.ErrorCode + " SocketErrorCode: " + se.SocketErrorCode);
}
}
finally
{
ns.Close();
client.Close();
if (this.HTTPResponse.mediaStream != null)
{
this.HTTPResponse.mediaStream.Close();
}
}
}
/// <summary>
/// We use one receive thread per socket
/// </summary>
/// <param name="o"></param>
private void ReceiveThread(Object o)
{
ReceiveThreadArgs args = (ReceiveThreadArgs)o;
NetworkStream ns = args.NetStream;
ParticipantModel participant = args.Participant;
Guid participantId = participant.Guid;
EndPoint remoteEP = args.RemoteEndPoint;
IFormatter binaryFormatter = new BinaryFormatter();
#if GENERIC_SERIALIZATION
IGenericSerializable msg = null;
#else
object msg = null;
#endif
while (!this.m_Disposed)
{
try {
#if GENERIC_SERIALIZATION
msg = PacketTypes.DecodeMessage(null, new SerializedPacket(ns));
#else
msg = binaryFormatter.Deserialize(ns); //blocks
#endif
}
catch (SerializationException se) {
Trace.WriteLine(se.ToString(), this.GetType().ToString());
break;
}
catch (Exception e) {
if (e.InnerException is SocketException)
{
SocketException se = (SocketException)e.InnerException;
if (se.ErrorCode == 10054)
{
Trace.WriteLine("ReceiveThread detected a disconnected client during NetworkStream.Read: " + remoteEP.ToString(), this.GetType().ToString());
break;
}
else if (se.ErrorCode == 10053)
{
Trace.WriteLine("ReceiveThread: socket was closed by local host.", this.GetType().ToString());
break;
}
else if (se.ErrorCode == 10004)
{
Trace.WriteLine("ReceiveThread: a blocking operation was interrupted.", this.GetType().ToString());
break;
}
else
{
Trace.WriteLine("SocketException in ReceiveThread. remote Endpoint= " + remoteEP.ToString() + " " + se.ToString() + " error code: " + se.ErrorCode.ToString(), this.GetType().ToString());
break;
}
}
else
{
Trace.WriteLine("Exception while reading: " + e.ToString(), this.GetType().ToString());
break;
}
}
lock (m_ReceiveQueue) {
m_ReceiveQueue.Enqueue(new ReceiveMessageAndParticipant(msg, participant));
}
}
//Remove the participant from the classroom here. Notice that the socket for this participant may still be open.
using (Synchronizer.Lock(m_Classroom.SyncRoot)) {
m_Classroom.Participants.Remove(participant);
}
Trace.WriteLine("ReceiveThread is ending for remote endpoint=" + remoteEP.ToString(), this.GetType().ToString());
}
