/// <summary>
/// The Channel layer normalizes exceptions thrown by the underlying networking implementations
/// into subclasses of CommunicationException, so that Channels can be used polymorphically from
/// an exception handling perspective.
/// </summary>
internal static CommunicationException ConvertTransferException(SocketException socketException)
{
return new CommunicationException(
string.Format(CultureInfo.CurrentCulture,
"A Udp error ({0}: {1}) occurred while transmitting data.", socketException.ErrorCode, socketException.Message),
socketException);
}
private void OnDisconnect(/*OPTIONAL*/ SocketException socketException)
{
// This handles disconnects if, for example, the app exits
// If we have any waiting operations, we want to abort them
List<WaitingOperationDescriptor> operationsToAbort = null;
lock (_waitingOperations)
{
operationsToAbort = new List<WaitingOperationDescriptor>(_waitingOperations.Values);
_waitingOperations.Clear();
}
foreach (var operation in operationsToAbort)
{
if (socketException == null)
{
operation.Abort();
}
else
{
operation.OnSocketError(socketException);
}
}
// Otherwise just drop the connection
}
/// <summary>
/// Determines if the exception thrown is a <see cref="SocketException"/> meaning that the connection was closed by the other side.
/// </summary>
public static bool IsConnectionAbortedByTheOtherSide(SocketException socketEx)
{
if (socketEx == null)
throw new ArgumentNullException("socketEx");
return ConnectionClosedErrors.Contains(socketEx.SocketErrorCode);
}
void Complete(SocketAsyncEventArgs e, bool completeSynchronously)
{
TransportBase transport = null;
Exception exception = null;
if (e.SocketError != SocketError.Success)
{
exception = new SocketException((int)e.SocketError);
if (e.AcceptSocket != null)
{
e.AcceptSocket.Close(0);
}
}
else
{
Fx.Assert(e.AcceptSocket != null, "Must have a valid socket accepted.");
transport = new TcpTransport(e.AcceptSocket, this.transportSettings);
transport.Open();
}
e.Dispose();
this.callbackArgs.CompletedSynchronously = completeSynchronously;
this.callbackArgs.Exception = exception;
this.callbackArgs.Transport = transport;
if (!completeSynchronously)
{
this.callbackArgs.CompletedCallback(this.callbackArgs);
}
}
public static TcpClient Connect(IPEndPoint remoteEndPoint, int timeoutMSec)
{
TimeoutObject.Reset();
socketexception = null;
string serverip = Convert.ToString(remoteEndPoint.Address);
int serverport = remoteEndPoint.Port;
TcpClient tcpclient = new TcpClient();
tcpclient.BeginConnect(serverip, serverport,
new AsyncCallback(CallBackMethod), tcpclient);
if (TimeoutObject.WaitOne(timeoutMSec, false))
{
if (IsConnectionSuccessful)
{
return tcpclient;
}
else
{
throw socketexception;
}
}
else
{
tcpclient.Close();
throw new TimeoutException("TimeOut Exception");
}
}
unsafe public void Run(object state)
{
byte[] address = new byte [1024];
int size = 1024;
Errno errno;
fixed(byte *ptr = address)
do
{
accepted = accept(socket, ptr,
ref size);
errno = Stdlib.GetLastError();
} while ((int)accepted == -1 &&
errno == Errno.EINTR);
if ((int)accepted == -1)
{
except = GetException(errno);
}
completed = true;
if (waithandle != null)
{
waithandle.Set();
}
if (callback != null)
{
callback(this);
}
}
public static unsafe SafeCloseSocket CreateSocket(SocketInformation socketInformation, out AddressFamily addressFamily, out SocketType socketType, out ProtocolType protocolType)
{
SafeCloseSocket handle;
Interop.Winsock.WSAPROTOCOL_INFO protocolInfo;
fixed (byte* pinnedBuffer = socketInformation.ProtocolInformation)
{
handle = SafeCloseSocket.CreateWSASocket(pinnedBuffer);
protocolInfo = (Interop.Winsock.WSAPROTOCOL_INFO)Marshal.PtrToStructure<Interop.Winsock.WSAPROTOCOL_INFO>((IntPtr)pinnedBuffer);
}
if (handle.IsInvalid)
{
SocketException e = new SocketException();
if (e.SocketErrorCode == SocketError.InvalidArgument)
{
throw new ArgumentException(SR.net_sockets_invalid_socketinformation, "socketInformation");
}
else
{
throw e;
}
}
addressFamily = protocolInfo.iAddressFamily;
socketType = (SocketType)protocolInfo.iSocketType;
protocolType = (ProtocolType)protocolInfo.iProtocol;
return handle;
}
private async Task <SocketMessage> InternalReceiveAsync()
{
if (this.Closed)
{
throw new SocketException((int)SocketError.NotConnected);
}
SocketMessage msg = null;
try
{
using (BinaryReader streamReader = new BinaryReader(this.Stream, Encoding.UTF8, true))
{
int len = streamReader.ReadInt32();
byte[] block = streamReader.ReadBytes(len);
object result = this.Serializer.ReadObject(new MemoryStream(block));
var wrapper = result as MessageWrapper;
if (wrapper != null && wrapper.Message is SocketMessage)
{
msg = (SocketMessage)wrapper.Message;
if (msg.Id == DisconnectMessageId)
{
// client is politely saying good bye...
this.OnClosed();
}
else if (msg.Id == ConnectedMessageId)
{
// must send an acknowledgement of the connect message
this.Name = msg.Sender;
await this.SendAsync(new SocketMessage(MessageAck, this.Name));
}
else if (msg.Id == OpenBackChannelMessageId && this.Server != null)
{
// client is requesting a back channel.
await this.HandleBackchannelRequest(msg);
}
}
}
}
catch (EndOfStreamException)
{
this.OnClosed();
}
catch (System.IO.IOException ioe)
{
System.Net.Sockets.SocketException se = ioe.InnerException as System.Net.Sockets.SocketException;
if (se.SocketErrorCode == SocketError.ConnectionReset)
{
this.OnClosed();
}
}
catch (Exception ex)
{
this.OnError(ex);
}
return(msg);
}
bool IsWouldBlockException(SocketException e)
{
#if CF
return (e.NativeErrorCode == 10035);
#else
return (e.SocketErrorCode == SocketError.WouldBlock);
#endif
}
bool IsTimeoutException(SocketException e)
{
#if CF
return (e.NativeErrorCode == 10060);
#else
return (e.SocketErrorCode == SocketError.TimedOut);
#endif
}
internal static IPAddress Parse(string ipString, bool tryParse)
{
if (ipString == null)
{
if (tryParse)
{
return null;
}
throw new ArgumentNullException("ipString");
}
uint error = 0;
// IPv6 Changes: Detect probable IPv6 addresses and use separate parse method.
if (ipString.IndexOf(':') != -1)
{
// If the address string contains the colon character
// then it can only be an IPv6 address. Use a separate
// parse method to unpick it all. Note: we don't support
// port specification at the end of address and so can
// make this decision.
uint scope;
byte[] bytes = new byte[IPAddressParserStatics.IPv6AddressBytes];
error = IPAddressPal.Ipv6StringToAddress(ipString, bytes, out scope);
if (error == IPAddressPal.SuccessErrorCode)
{
// AppCompat: .Net 4.5 ignores a correct port if the address was specified in brackets.
// Will still throw for an incorrect port.
return new IPAddress(bytes, (long)scope);
}
}
else
{
ushort port;
byte[] bytes = new byte[IPAddressParserStatics.IPv4AddressBytes];
error = IPAddressPal.Ipv4StringToAddress(ipString, bytes, out port);
if (error == IPAddressPal.SuccessErrorCode)
{
if (port != 0)
{
throw new FormatException(SR.dns_bad_ip_address);
}
return new IPAddress(bytes);
}
}
if (tryParse)
{
return null;
}
Exception e = new SocketException(IPAddressPal.GetSocketErrorForErrorCode(error), error);
throw new FormatException(SR.dns_bad_ip_address, e);
}
public int Connect(ref ArraySegment <byte> readBuffer, IList <ArraySegment <byte> > writeBuffer)
{
if (_state == StateNeedConnect)
{
_state = StateConnectPending;
return(SocketOperation.Connect);
}
else if (_state <= StateConnectPending)
{
Debug.Assert(_writeEventArgs != null);
if (_writeEventArgs.SocketError != SocketError.Success)
{
var ex = new System.Net.Sockets.SocketException((int)_writeEventArgs.SocketError);
if (Network.ConnectionRefused(ex))
{
throw new ConnectionRefusedException(ex);
}
else
{
throw new ConnectFailedException(ex);
}
}
Debug.Assert(_fd != null);
_desc = Network.FdToString(_fd, _proxy, _addr);
_state = _proxy != null ? StateProxyWrite : StateConnected;
}
if (_state == StateProxyWrite)
{
Debug.Assert(_proxy != null);
Debug.Assert(_addr != null);
_proxy.BeginWrite(_addr, writeBuffer);
return(SocketOperation.Write);
}
else if (_state == StateProxyRead)
{
Debug.Assert(_proxy != null);
readBuffer = _proxy.BeginRead();
return(SocketOperation.Read);
}
else if (_state == StateProxyConnected)
{
Debug.Assert(_proxy != null);
_proxy.Finish(readBuffer);
// TODO Return buffers to the pool
readBuffer = ArraySegment <byte> .Empty;
writeBuffer.Clear();
_state = StateConnected;
}
Debug.Assert(_state == StateConnected);
return(SocketOperation.None);
}
public int initialize()
{
if(_state == StateNeedConnect)
{
_state = StateConnectPending;
return SocketOperation.Connect;
}
else if(_state <= StateConnectPending)
{
try
{
#if ICE_SOCKET_ASYNC_API
if(_writeEventArgs.SocketError != SocketError.Success)
{
SocketException ex = new SocketException((int)_writeEventArgs.SocketError);
if(Network.connectionRefused(ex))
{
throw new Ice.ConnectionRefusedException(ex);
}
else
{
throw new Ice.ConnectFailedException(ex);
}
}
#else
Network.doFinishConnectAsync(_fd, _writeResult);
_writeResult = null;
#endif
_state = StateConnected;
_desc = Network.fdToString(_fd);
}
catch(Ice.LocalException ex)
{
if(_traceLevels.network >= 2)
{
System.Text.StringBuilder s = new System.Text.StringBuilder();
s.Append("failed to establish tcp connection\n");
s.Append(Network.fdLocalAddressToString(_fd));
Debug.Assert(_addr != null);
s.Append("\nremote address = " + _addr.ToString() + "\n");
s.Append(ex.ToString());
_logger.trace(_traceLevels.networkCat, s.ToString());
}
throw;
}
if(_traceLevels.network >= 1)
{
string s = "tcp connection established\n" + _desc;
_logger.trace(_traceLevels.networkCat, s);
}
}
Debug.Assert(_state == StateConnected);
return SocketOperation.None;
}
private void RecvCallback_obsolete(IAsyncResult ar)
{
try
{
if (RemoteState != null)
{
if (RemoteState.Stream.CanRead)
{
int len = RemoteState.Stream.EndRead(ar);
if (len == 0)
{
Disconnect();
}
else
{
string data = "";
if (ProtocolStrategy != null)
{
data = ProtocolStrategy.Encoding.GetString(RemoteState.ReadBuffer, 0, len);
ProtocolStrategy.Parse(data, null);
}
RemoteState.Stream.BeginRead(RemoteState.ReadBuffer, 0, RemoteState.ReadBuffer.Length, new AsyncCallback(RecvCallback_obsolete), null);
}
}
}
else
{
}
}
catch (System.IO.IOException ioe)
{
if (ioe.InnerException.GetType() == typeof(System.Net.Sockets.SocketError))
{
System.Net.Sockets.SocketException se = (System.Net.Sockets.SocketException)ioe.InnerException;
try
{
Disconnect();
}
catch (NullReferenceException)
{ }
catch (Exception e)
{
OnAsyncException(new ExceptionEventArgs(e));
}
}
}
catch (NullReferenceException)
{ }
catch (Exception e)
{
OnAsyncException(new ExceptionEventArgs(e));
}
}
protected bool ValidateAsyncResult(SocketAsyncEventArgs e)
{
if (e.SocketError != SocketError.Success)
{
var socketException = new SocketException((int)e.SocketError);
OnCompleted(new ProxyEventArgs(new Exception(socketException.Message, socketException)));
return false;
}
return true;
}
static ErrorType HandleDnsLookupError( string context, SocketException se )
{
switch( se.SocketErrorCode ) {
case SocketError.HostNotFound:
case SocketError.NoData:
return ErrorType.PermanentKnown;
default:
Debug.WriteLine( string.Format( "WARNING: Unexpected SocketException with SocketErrorCode=={0} in {1}", Enum.GetName(typeof(SocketError),se.SocketErrorCode), context ) );
return ErrorType.TemporaryUnknown;
}
}
public static Exception ConvertListenException(SocketException socketException, IPEndPoint localEndpoint)
{
if (socketException.ErrorCode == 6)
{
return new CommunicationObjectAbortedException(socketException.Message, socketException);
}
if (socketException.ErrorCode == 0x2740)
{
return new AddressAlreadyInUseException(System.ServiceModel.SR.GetString("TcpAddressInUse", new object[] { localEndpoint.ToString() }), socketException);
}
return new CommunicationException(System.ServiceModel.SR.GetString("TcpListenError", new object[] { socketException.ErrorCode, socketException.Message, localEndpoint.ToString() }), socketException);
}
void HandleIOException(System.IO.IOException ioe, RemoteHostState state)
{
if (ioe.InnerException.GetType() == typeof(System.Net.Sockets.SocketError))
{
System.Net.Sockets.SocketException se = (System.Net.Sockets.SocketException)ioe.InnerException;
CloseConnection(state, (se.SocketErrorCode == SocketError.Interrupted) ? null : se);
}
else
{
CloseConnection(state, ioe);
}
}
internal ServerMockReceivedEventArgs( SocketAsyncEventArgs context )
{
this._context = context;
if ( context.SocketError != SocketError.Success )
{
this._socketException = new SocketException( ( int )context.SocketError );
}
else
{
this._socketException = null;
}
}
public int connect(Buffer readBuffer, Buffer writeBuffer, ref bool moreData)
{
if(_state == StateNeedConnect)
{
_state = StateConnectPending;
return SocketOperation.Connect;
}
else if(_state <= StateConnectPending)
{
#if ICE_SOCKET_ASYNC_API
if(_writeEventArgs.SocketError != SocketError.Success)
{
SocketException ex = new SocketException((int)_writeEventArgs.SocketError);
if(Network.connectionRefused(ex))
{
throw new Ice.ConnectionRefusedException(ex);
}
else
{
throw new Ice.ConnectFailedException(ex);
}
}
#else
Network.doFinishConnectAsync(_fd, _writeResult);
_writeResult = null;
#endif
_desc = Network.fdToString(_fd, _proxy, _addr);
_state = _proxy != null ? StateProxyWrite : StateConnected;
}
if(_state == StateProxyWrite)
{
_proxy.beginWrite(_addr, writeBuffer);
return SocketOperation.Write;
}
else if(_state == StateProxyRead)
{
_proxy.beginRead(readBuffer);
return SocketOperation.Read;
}
else if(_state == StateProxyConnected)
{
_proxy.finish(readBuffer, writeBuffer);
readBuffer.clear();
writeBuffer.clear();
_state = StateConnected;
}
Debug.Assert(_state == StateConnected);
return SocketOperation.None;
}
private void server_ErrorReceived(object sender, NetSockErrorReceivedEventArgs e)
{
if (e.Exception.GetType() == typeof(System.Net.Sockets.SocketException))
{
System.Net.Sockets.SocketException s = (System.Net.Sockets.SocketException)e.Exception;
account.Log(new ErrorTextInformation("Error: " + e.Function + " - " + s.SocketErrorCode.ToString() + "\r\n" + s.ToString()), 0);
}
else
{
account.Log(new ErrorTextInformation("Error: " + e.Function + "\r\n" + e.Exception.ToString()), 0);
}
}
private void OnSocketError(object sender, EventNetSockErrorReceived e)
{
if (e.Exception.GetType() == typeof(System.Net.Sockets.SocketException))
{
System.Net.Sockets.SocketException s = (System.Net.Sockets.SocketException)e.Exception;
Debug.Log("OnSocketError > System.Net.Sockets Exception " + e.Function + " - " + s.SocketErrorCode.ToString() + " => " + s.ToString());
}
else
{
Debug.Log("OnSocketError > ERROR : " + e.Function.ToString() + " => " + e.Exception.ToString());
}
_ReceiveSchedule.AddMessage(eEventIDs.SocketError);
}
private void catchSocketException(System.Net.Sockets.SocketException e)
{
Console.WriteLine("Socket Error...");
if (e.ErrorCode == /*WSAECONNRESET*/ 0x2746)
{
state = CONNSTATE.Disconnected;
form.updateConnectionListEntry(this);
}
else
{
die();
}
}
public static void ThrowServerException(SocketException e, ServerContext serverContext = null)
{
string ipAddress = serverContext != null ? serverContext.IPAddress.ToString() : "unknown";
string port = serverContext != null ? serverContext.Port.ToString() : "-";
if (ipAddress.Equals("0.0.0.0")) ipAddress = "any";
if (e.Message.StartsWith("Only one usage of each socket address"))
throw new ServerException(
string.Format(
"Can't bind to socket on port {0} for IP addresses ({1}) because it is already in use (is the server already running?)",
port, ipAddress), e);
throw e;
}
void WriteCallback(IAsyncResult ar)
{
try
{
RemoteHostState state = ar.AsyncState as RemoteHostState;
state.Stream.EndWrite(ar);
}
catch (System.IO.IOException ioe)
{
if (ioe.InnerException.GetType() == typeof(System.Net.Sockets.SocketError))
{
System.Net.Sockets.SocketException se = (System.Net.Sockets.SocketException)ioe.InnerException;
if (DoCloseConnection())
{
OnClosedConnection((se.SocketErrorCode == SocketError.Interrupted) ? null : se);
}
}
else
if (DoCloseConnection())
{
OnClosedConnection(ioe);
}
return;
}
//We dont need to take care of ObjectDisposedException.
//ObjectDisposedException would indicate that the state has been closed, and that means it has been disconnected already
catch { }
bool doSendMore = false;
if (RemoteState != null)
{
lock (RemoteState.SendQueue)
{
RemoteState.SendQueue.Dequeue();
if (RemoteState.SendQueue.Count > 0)
{
doSendMore = true;
}
}
}
if (doSendMore)
{
DoSend();
}
}
public static bool IsDisconnected(SocketException exception)
{
switch ((SocketError) exception.ErrorCode)
{
case SocketError.ConnectionAborted:
case SocketError.ConnectionReset:
case SocketError.Fault:
case SocketError.NetworkReset:
case SocketError.OperationAborted:
case SocketError.Shutdown:
case SocketError.SocketError:
case SocketError.TimedOut:
return true;
}
return false;
}
public static bool IsSocketDisconnectedException(SocketException socketException)
{
var errorCode = socketException.SocketErrorCode;
return errorCode == SocketError.NetworkDown ||
errorCode == SocketError.NetworkReset ||
errorCode == SocketError.NetworkUnreachable ||
errorCode == SocketError.ConnectionAborted ||
errorCode == SocketError.ConnectionReset ||
errorCode == SocketError.HostNotFound ||
errorCode == SocketError.HostUnreachable ||
errorCode == SocketError.NotConnected ||
errorCode == SocketError.Shutdown ||
errorCode == SocketError.Disconnecting ||
errorCode == SocketError.AddressNotAvailable ||
errorCode == SocketError.TimedOut;
}
protected bool ValidateAsyncResult(SocketAsyncEventArgs e)
{
if (e == null)
{
throw new ArgumentNullException("e");
}
if (e.SocketError != SocketError.Success)
{
var socketException = new SocketException((int)e.SocketError);
this.OnCompleted(new ProxyEventArgs(new Exception(socketException.Message, socketException)));
return false;
}
return true;
}
private static void CurrentDomain_FirstChanceException(object sender, System.Runtime.ExceptionServices.FirstChanceExceptionEventArgs e)
{
if (ExceptionLogger != null)
{
System.Net.Sockets.SocketException tempExcption = null;
if (e.Exception is System.Net.Sockets.SocketException)
{
tempExcption = (System.Net.Sockets.SocketException)e.Exception;
}
if (tempExcption == null || (tempExcption.ErrorCode != 125 && tempExcption.ErrorCode != 111 && tempExcption.ErrorCode != 104))
{
ExceptionLogger.Error("Exception: {0} ", e.Exception.ToString());
}
}
}
void Complete(SocketAsyncEventArgs e, bool completeSynchronously)
{
TransportBase transport = null;
Exception exception = null;
if (e.SocketError != SocketError.Success)
{
exception = new SocketException((int)e.SocketError);
if (e.AcceptSocket != null)
{
e.AcceptSocket.Dispose();
}
}
else
{
try
{
Fx.Assert(e.ConnectSocket != null, "Must have a valid socket accepted.");
e.ConnectSocket.NoDelay = true;
transport = new TcpTransport(e.ConnectSocket, this.transportSettings);
transport.Open();
}
catch (Exception exp)
{
if (Fx.IsFatal(exp))
{
throw;
}
exception = exp;
if (transport != null)
{
transport.SafeClose();
}
transport = null;
}
}
e.Dispose();
this.callbackArgs.CompletedSynchronously = completeSynchronously;
this.callbackArgs.Exception = exception;
this.callbackArgs.Transport = transport;
if (!completeSynchronously)
{
this.callbackArgs.CompletedCallback(this.callbackArgs);
}
}
public static void Connect(this TcpClient connection, string ip, int port, out SocketException ex)
{
ex = null;
for (int i = 0; i < 10 && !connection.Connected; i++)
{
try
{
connection.Connect(IPAddress.Parse(ip), port);
break;
}
catch (SocketException se)
{
ex = se;
continue;
}
}
}
private static void ShowError(SocketException aSocketException)
{
String errorText;
switch (aSocketException.ErrorCode)
{
case 10060:
errorText = ExceptionStrings.ErrorWsaETimedOut;
break;
case 10061:
errorText = ExceptionStrings.ErrorWsaEConnRefused;
break;
default:
errorText = Convert.ToString(aSocketException.ErrorCode) + "; " + aSocketException.Message;
break;
}
ShowError(errorText);
}
internal static Exception ConvertSocketException(SocketException socketException, string operation)
{
if (socketException.ErrorCode == 10049 // WSAEADDRNOTAVAIL
|| socketException.ErrorCode == 10061 // WSAECONNREFUSED
|| socketException.ErrorCode == 10050 // WSAENETDOWN
|| socketException.ErrorCode == 10051 // WSAENETUNREACH
|| socketException.ErrorCode == 10064 // WSAEHOSTDOWN
|| socketException.ErrorCode == 10065) // WSAEHOSTUNREACH
{
return new EndpointNotFoundException(string.Format(operation + " error: {0} ({1})", socketException.Message, socketException.ErrorCode), socketException);
}
if (socketException.ErrorCode == 10060) // WSAETIMEDOUT
{
return new TimeoutException(operation + " timed out.", socketException);
}
else
{
return new CommunicationException(string.Format(operation + " error: {0} ({1})", socketException.Message, socketException.ErrorCode), socketException);
}
}
private void SendFileInternal(string fileName, byte[] preBuffer, byte[] postBuffer, TransmitFileOptions flags)
{
CheckTransmitFileOptions(flags);
// Open the file, if any
// Open it before we send the preBuffer so that any exception happens first
FileStream fileStream = OpenFile(fileName);
SocketError errorCode = SocketError.Success;
using (fileStream)
{
// Send the preBuffer, if any
// This will throw on error
if (preBuffer != null && preBuffer.Length > 0)
{
Send(preBuffer);
}
// Send the file, if any
if (fileStream != null)
{
// This can throw ObjectDisposedException.
errorCode = SocketPal.SendFile(_handle, fileStream);
}
}
if (errorCode != SocketError.Success)
{
SocketException socketException = new SocketException((int)errorCode);
UpdateStatusAfterSocketError(socketException);
if (NetEventSource.IsEnabled) NetEventSource.Error(this, socketException);
throw socketException;
}
// Send the postBuffer, if any
// This will throw on error
if (postBuffer != null && postBuffer.Length > 0)
{
Send(postBuffer);
}
}
public void Connect(TcpClient client, out SocketException ex)
{
ex = null;
for (int i = 0; i < 10 && !ReadWriteClient.Connected; i++)
{
try
{
if (client.Equals(ReadWriteClient))
client.Connect(_readWriteEndpoint);
if (client.Equals(ReadOnlyClient))
client.Connect(_readOnlyEndpoint);
break;
}
catch (SocketException se)
{
ex = se;
continue;
}
}
}
void DoSend()
{
try
{
byte[] data = null;
lock (RemoteState.SendQueue)
{
if (RemoteState.SendQueue.Count > 0)
{
data = RemoteState.SendQueue.Peek();
}
}
if (data != null)
{
RemoteState.Stream.BeginWrite(data, 0, data.Length, writeCallback, RemoteState);
}
}
catch (System.IO.IOException ioe)
{
if (ioe.InnerException.GetType() == typeof(System.Net.Sockets.SocketError))
{
System.Net.Sockets.SocketException se = (System.Net.Sockets.SocketException)ioe.InnerException;
if (DoCloseConnection())
{
OnClosedConnection((se.SocketErrorCode == SocketError.Interrupted) ? null : se);
}
}
else
if (DoCloseConnection())
{
OnClosedConnection(ioe);
}
}
//We dont need to take care of ObjectDisposedException.
//ObjectDisposedException would indicate that the state has been closed, and that means it has been disconnected already
catch { }
}
private static void CallBackMethod(IAsyncResult asyncresult)
{
try
{
IsConnectionSuccessful = false;
TcpClient tcpclient = asyncresult.AsyncState as TcpClient;
if (tcpclient.Client != null)
{
tcpclient.EndConnect(asyncresult);
IsConnectionSuccessful = true;
}
}
catch (Exception ex)
{
IsConnectionSuccessful = false;
socketexception = (SocketException) ex;
}
finally
{
TimeoutObject.Set();
}
}
/// <summary>
/// 错误日志
/// </summary>
/// <param name="error">错误异常</param>
public static void ErrorLog(Exception error)
{
if (error != null)
{
IOException ioError = error as IOException;
if (ioError != null)
{
error = ioError.InnerException;
}
ObjectDisposedException disposedError = error.InnerException as ObjectDisposedException;
if (disposedError == null)
{
System.Net.Sockets.SocketException socketException = error as System.Net.Sockets.SocketException;
if (socketException == null || socketException.ErrorCode != 10053 || socketException.ErrorCode != 10054)
{
log.Default.Add(error, null, true);
}
}
else
{
log.Default.Add(error, null, true);
}
}
}
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());
}
// Callback which fires when an internal connection attempt completes.
// If it failed and there are more addresses to try, do it.
private void InternalConnectCallback(object sender, SocketAsyncEventArgs args)
{
Exception exception = null;
lock (_lockObject)
{
if (_state == State.Canceled)
{
// If Cancel was called before we got the lock, the Socket will be closed soon. We need to report
// OperationAborted (even though the connection actually completed), or the user will try to use a
// closed Socket.
exception = new SocketException((int)SocketError.OperationAborted);
}
else if (_state == State.ConnectAttempt)
{
if (args.SocketError == SocketError.Success)
{
if (RequiresUserConnectAttempt)
{
exception = AttemptUserConnection();
if (exception == null)
{
// Don't call the callback; we've started a connection attempt on the
// user's socket.
_state = State.UserConnectAttempt;
return;
}
}
// The connection attempt succeeded or the user connect attempt failed synchronously; go to the
// completed state. The callback will be called outside the lock.
_state = State.Completed;
}
else if (args.SocketError == SocketError.OperationAborted)
{
// The socket was closed while the connect was in progress. This can happen if the user
// closes the socket, and is equivalent to a call to CancelConnectAsync
exception = new SocketException((int)SocketError.OperationAborted);
_state = State.Canceled;
}
else
{
// Try again, if there are more IPAddresses to be had.
// If the underlying OS does not support multiple connect attempts
// on the same socket, dispose the socket used for the last attempt.
if (!SocketPal.SupportsMultipleConnectAttempts)
{
_lastAttemptSocket.Dispose();
}
// Keep track of this because it will be overwritten by AttemptConnection
SocketError currentFailure = args.SocketError;
Exception connectException = AttemptConnection();
if (connectException == null)
{
// don't call the callback, another connection attempt is successfully started
return;
}
else
{
SocketException socketException = connectException as SocketException;
if (socketException != null && socketException.SocketErrorCode == SocketError.NoData)
{
// If the error is NoData, that means there are no more IPAddresses to attempt
// a connection to. Return the last error from an actual connection instead.
exception = new SocketException((int)currentFailure);
}
else
{
exception = connectException;
}
_state = State.Completed;
}
}
}
else
{
if (GlobalLog.IsEnabled)
{
if (_state != State.UserConnectAttempt)
{
GlobalLog.Assert("MultipleConnectAsync.InternalConnectCallback(): Unexpected object state");
}
if (!RequiresUserConnectAttempt)
{
GlobalLog.Assert("MultipleConnectAsync.InternalConnectCallback(): State.UserConnectAttempt without RequiresUserConnectAttempt");
}
}
if (args.SocketError == SocketError.Success)
{
_state = State.Completed;
}
else if (args.SocketError == SocketError.OperationAborted)
{
// The socket was closed while the connect was in progress. This can happen if the user
// closes the socket, and is equivalent to a call to CancelConnectAsync
exception = new SocketException((int)SocketError.OperationAborted);
_state = State.Canceled;
}
else
{
// The connect attempt on the user's socket failed. Return the corresponding error.
exception = new SocketException((int)args.SocketError);
_state = State.Completed;
}
}
}
if (exception == null)
{
Succeed();
}
else
{
AsyncFail(exception);
}
}
// Callback which fires when an internal connection attempt completes.
// If it failed and there are more addresses to try, do it.
private void InternalConnectCallback(object sender, SocketAsyncEventArgs args)
{
Exception exception = null;
lock (_lockObject)
{
if (_state == State.Canceled)
{
// If Cancel was called before we got the lock, the Socket will be closed soon. We need to report
// OperationAborted (even though the connection actually completed), or the user will try to use a
// closed Socket.
exception = new SocketException((int)SocketError.OperationAborted);
}
else
{
Debug.Assert(_state == State.ConnectAttempt);
if (args.SocketError == SocketError.Success)
{
// The connection attempt succeeded; go to the completed state.
// The callback will be called outside the lock.
_state = State.Completed;
}
else if (args.SocketError == SocketError.OperationAborted)
{
// The socket was closed while the connect was in progress. This can happen if the user
// closes the socket, and is equivalent to a call to CancelConnectAsync
exception = new SocketException((int)SocketError.OperationAborted);
_state = State.Canceled;
}
else
{
// Keep track of this because it will be overwritten by AttemptConnection
SocketError currentFailure = args.SocketError;
Exception connectException = AttemptConnection();
if (connectException == null)
{
// don't call the callback, another connection attempt is successfully started
return;
}
else
{
SocketException socketException = connectException as SocketException;
if (socketException != null && socketException.SocketErrorCode == SocketError.NoData)
{
// If the error is NoData, that means there are no more IPAddresses to attempt
// a connection to. Return the last error from an actual connection instead.
exception = new SocketException((int)currentFailure);
}
else
{
exception = connectException;
}
_state = State.Completed;
}
}
}
}
if (exception == null)
{
Succeed();
}
else
{
AsyncFail(exception);
}
}
private static IOException GetExceptionFromSocketException(string message, SocketException innerException)
{
return(new IOException(message, innerException));
}
// Callback which fires when an internal connection attempt completes.
// If it failed and there are more addresses to try, do it.
// Returns true if the operation is pending, false if it completed synchronously.
private bool DoConnectCallback(SocketAsyncEventArgs args, bool sync)
{
Exception?exception = null;
Debug.Assert(!Monitor.IsEntered(_lockObject));
lock (_lockObject)
{
if (_state == State.Canceled)
{
// If Cancel was called before we got the lock, the Socket will be closed soon. We need to report
// OperationAborted (even though the connection actually completed), or the user will try to use a
// closed Socket.
exception = new SocketException((int)SocketError.OperationAborted);
}
else
{
while (true)
{
Debug.Assert(_state == State.ConnectAttempt);
if (args.SocketError == SocketError.Success)
{
// The connection attempt succeeded; go to the completed state.
// The callback will be called outside the lock.
_state = State.Completed;
break;
}
else if (args.SocketError == SocketError.OperationAborted)
{
// The socket was closed while the connect was in progress. This can happen if the user
// closes the socket, and is equivalent to a call to CancelConnectAsync
exception = new SocketException((int)SocketError.OperationAborted);
_state = State.Canceled;
break;
}
else
{
// Keep track of this because it will be overwritten by AttemptConnection
SocketError currentFailure = args.SocketError;
(Exception? connectException, bool pending) = AttemptConnection();
if (connectException == null)
{
if (pending)
{
// don't call the callback, another connection attempt is successfully started
return(true);
}
// We have a sync completion from AttemptConnection.
// Loop around and process its results.
}
else
{
SocketException?socketException = connectException as SocketException;
if (socketException != null && socketException.SocketErrorCode == SocketError.NoData)
{
// If the error is NoData, that means there are no more IPAddresses to attempt
// a connection to. Return the last error from an actual connection instead.
exception = new SocketException((int)currentFailure);
}
else
{
exception = connectException;
}
_state = State.Completed;
break;
}
}
}
}
}
if (exception != null)
{
return(Fail(sync, exception));
}
else
{
return(Succeed(sync));
}
}
private void ThrowIOSocketException()
{
var se = new SocketException((int)SocketError);
throw new IOException(SR.Format(SR.net_io_readfailure, se.Message), se);
}
/// <summary>
/// Raises the <see cref="ClientBase.ReceiveDataException"/> event.
/// </summary>
/// <param name="ex">Exception to send to <see cref="ClientBase.ReceiveDataException"/> event.</param>
protected void OnReceiveDataException(SocketException ex)
{
if (ex.SocketErrorCode != SocketError.Disconnecting)
OnReceiveDataException((Exception)ex);
}
private void ReadCallback(IAsyncResult ar)
{
try
{
RemoteHostState state = ar.AsyncState as RemoteHostState;
int len = 0;
len = state.Stream.EndRead(ar);
if (len == 0)
{
CloseConnection();
}
else
{
try
{
if (ProtocolStrategy != null)
{
if (ProtocolStrategy.Encoding != null)
{
if (state.Decoder == null)
{
state.Decoder = ProtocolStrategy.Encoding.GetDecoder();
}
int charCount = state.Decoder.GetCharCount(state.ReadBuffer, 0, len);
char[] chars = new char[charCount];
state.Decoder.GetChars(state.ReadBuffer, 0, len, chars, 0);
string msg = new string(chars);
ProtocolStrategy.Parse(msg, state);
}
else
{
ProtocolStrategy.Parse(state.ReadBuffer, len, state);
}
}
}
catch { }
state.Stream.BeginRead(state.ReadBuffer, 0, state.ReadBuffer.Length, readCallback, state);
}
}
catch (System.IO.IOException ioe)
{
if (ioe.InnerException.GetType() == typeof(System.Net.Sockets.SocketError))
{
System.Net.Sockets.SocketException se = (System.Net.Sockets.SocketException)ioe.InnerException;
if (DoCloseConnection())
{
OnClosedConnection((se.SocketErrorCode == SocketError.Interrupted) ? null : se);
}
}
else
if (DoCloseConnection())
{
OnClosedConnection(ioe);
}
}
//We dont need to take care of ObjectDisposedException.
//ObjectDisposedException would indicate that the state has been closed, and that means it has been disconnected already
catch { }
}
private async Task <SocketMessage> InternalReceiveAsync()
{
if (this.Closed)
{
throw new SocketException((int)SocketError.NotConnected);
}
SocketMessage msg = null;
try
{
using (BinaryReader streamReader = new BinaryReader(this.Stream, Encoding.UTF8, true))
{
int len = streamReader.ReadInt32();
byte[] block = streamReader.ReadBytes(len);
object result = null;
if (len != block.Length)
{
// Can happen if the process at the other side of this socket was terminated.
// If we don't have the exact requested bytes then we cannot deserialize it.
}
else
{
try
{
result = this.Serializer.ReadObject(new MemoryStream(block));
}
catch (Exception)
{
// This can also happen when process on other side is terminated, the last network
// packet can be scrambled. This is usually just the DisconnectMessageId which is
// ignorable.
}
}
var wrapper = result as MessageWrapper;
if (wrapper != null && wrapper.Message is SocketMessage)
{
msg = (SocketMessage)wrapper.Message;
if (msg.Id == DisconnectMessageId)
{
// client is politely saying good bye...
this.OnClosed();
}
else if (msg.Id == ConnectedMessageId)
{
// must send an acknowledgement of the connect message
this.Name = msg.Sender;
await this.SendAsync(new SocketMessage(MessageAck, this.Name));
}
else if (msg.Id == OpenBackChannelMessageId && this.Server != null)
{
// client is requesting a back channel.
await this.HandleBackchannelRequest(msg);
}
}
}
}
catch (EndOfStreamException)
{
this.OnClosed();
}
catch (System.IO.IOException ioe)
{
System.Net.Sockets.SocketException se = ioe.InnerException as System.Net.Sockets.SocketException;
if (se.SocketErrorCode == SocketError.ConnectionReset)
{
this.OnClosed();
}
}
catch (Exception ex)
{
this.OnError(ex);
}
return(msg);
}
internal void OnSocketError(SocketException socketException)
{
_completionSource.TrySetException(new JdwpException(ErrorCode.SocketError, "Socket error reading the result", socketException));
}
public void FinishWrite(IList <ArraySegment <byte> > buffer, ref int offset)
{
Debug.Assert(_writeEventArgs != null);
Debug.Assert(offset == 0);
if (_fd == null)
{
int count = buffer.GetByteCount(); // Assume all the data was sent for at-most-once semantics.
_writeEventArgs = null;
offset = count;
return;
}
if (!_incoming && _state < StateConnected)
{
if (_writeEventArgs.SocketError != SocketError.Success)
{
var ex = new System.Net.Sockets.SocketException((int)_writeEventArgs.SocketError);
if (Network.ConnectionRefused(ex))
{
throw new ConnectionRefusedException(ex);
}
else
{
throw new ConnectFailedException(ex);
}
}
return;
}
int ret;
try
{
if (_writeEventArgs.SocketError != SocketError.Success)
{
throw new System.Net.Sockets.SocketException((int)_writeEventArgs.SocketError);
}
ret = _writeEventArgs.BytesTransferred;
_writeEventArgs.SetBuffer(null, 0, 0);
if (_writeEventArgs.BufferList != null && _writeEventArgs.BufferList != buffer)
{
_writeEventArgs.BufferList.Clear();
}
_writeEventArgs.BufferList = null;
}
catch (System.Net.Sockets.SocketException ex)
{
if (Network.ConnectionLost(ex))
{
throw new ConnectionLostException(ex);
}
else
{
throw new Ice.SocketException(ex);
}
}
if (ret == 0)
{
throw new ConnectionLostException();
}
Debug.Assert(ret > 0);
Debug.Assert(ret == buffer.GetByteCount());
offset = ret;
return;
}
private void _DaemonPipe_OnDisconnected(SocketException se)
{
if (se != null) Console.WriteLine("Disconnected! " + se.Message);
else Console.WriteLine("Disconnected!");
}
private async Task SendFileInternalAsync(FileStream fileStream, byte[] preBuffer, byte[] postBuffer)
{
SocketError errorCode = SocketError.Success;
using (fileStream)
{
// Send the preBuffer, if any
// This will throw on error
if (preBuffer != null && preBuffer.Length > 0)
{
// Using "this." makes the extension method kick in
await this.SendAsync(new ArraySegment <byte>(preBuffer), SocketFlags.None).ConfigureAwait(false);
}
// Send the file, if any
if (fileStream != null)
{
var tcs = new TaskCompletionSource <bool>();
// This can throw ObjectDisposedException.
errorCode = SocketPal.SendFileAsync(_handle, fileStream, (bytesTransferred, socketError) =>
{
if (socketError != SocketError.Success)
{
// Synchronous exception from SendFileAsync
SocketException socketException = new SocketException((int)errorCode);
UpdateStatusAfterSocketError(socketException);
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(this, socketException);
}
tcs.SetException(socketException);
}
tcs.SetResult(true);
});
await tcs.Task.ConfigureAwait(false);
}
}
if (errorCode != SocketError.Success)
{
// Synchronous exception from SendFileAsync
SocketException socketException = new SocketException((int)errorCode);
UpdateStatusAfterSocketError(socketException);
if (NetEventSource.IsEnabled)
{
NetEventSource.Error(this, socketException);
}
throw socketException;
}
// Send the postBuffer, if any
// This will throw on error
if (postBuffer != null && postBuffer.Length > 0)
{
// Using "this." makes the extension method kick in
await this.SendAsync(new ArraySegment <byte>(postBuffer), SocketFlags.None).ConfigureAwait(false);
}
}
