public void Listen()
{
// If you call listen() on a port, then kill the process, then immediately start a new process and
// try to listen() on the same port, you sometimes get WSAEADDRINUSE. Even if nothing was accepted.
// Ports don't immediately free themselves on process shutdown. We call listen() in a loop on a delay
// for a few iterations for this reason.
//
TimeSpan listenTimeout = TimeSpan.FromSeconds(1);
BackoffTimeoutHelper backoffHelper = new BackoffTimeoutHelper(listenTimeout);
lock (ThisLock)
{
if (this.listenSocket != null)
{
this.listenSocket.Listen(settings.ListenBacklog);
isListening = true;
}
while (!isListening)
{
try
{
this.listenSocket = new Socket(localEndpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
if (localEndpoint.AddressFamily == AddressFamily.InterNetworkV6 && settings.TeredoEnabled)
{
this.listenSocket.SetSocketOption(SocketOptionLevel.IPv6, (SocketOptionName)23, 10);
}
this.listenSocket.Bind(localEndpoint);
this.listenSocket.Listen(settings.ListenBacklog);
isListening = true;
}
catch (SocketException socketException)
{
bool retry = false;
if (socketException.ErrorCode == UnsafeNativeMethods.WSAEADDRINUSE)
{
if (!backoffHelper.IsExpired())
{
backoffHelper.WaitAndBackoff();
retry = true;
}
}
if (!retry)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
SocketConnectionListener.ConvertListenException(socketException, this.localEndpoint));
}
}
}
this.socketAsyncEventArgsPool = new SocketAsyncEventArgsPool(GetAcceptBufferSize(this.listenSocket));
}
}
IConnection TryConnect(Uri remoteUri, string resolvedAddress, BackoffTimeoutHelper backoffHelper)
{
const int access = UnsafeNativeMethods.GENERIC_READ | UnsafeNativeMethods.GENERIC_WRITE;
bool lastAttempt = backoffHelper.IsExpired();
int flags = UnsafeNativeMethods.FILE_FLAG_OVERLAPPED;
// By default Windows named pipe connection is created with impersonation, but we want
// to create it with anonymous and let WCF take care of impersonation/identification.
flags |= UnsafeNativeMethods.SECURITY_QOS_PRESENT | UnsafeNativeMethods.SECURITY_ANONYMOUS;
PipeHandle pipeHandle = UnsafeNativeMethods.CreateFile(resolvedAddress, access, 0, IntPtr.Zero,
UnsafeNativeMethods.OPEN_EXISTING, flags, IntPtr.Zero);
int error = Marshal.GetLastWin32Error();
if (pipeHandle.IsInvalid)
{
pipeHandle.SetHandleAsInvalid();
}
else
{
int mode = UnsafeNativeMethods.PIPE_READMODE_MESSAGE;
if (UnsafeNativeMethods.SetNamedPipeHandleState(pipeHandle, ref mode, IntPtr.Zero, IntPtr.Zero) == 0)
{
error = Marshal.GetLastWin32Error();
pipeHandle.Close();
PipeException innerException = new PipeException(SR.GetString(SR.PipeModeChangeFailed,
PipeError.GetErrorString(error)), error);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateConnectFailedException(remoteUri, innerException));
}
return new PipeConnection(pipeHandle, bufferSize, false, true);
}
if (error == UnsafeNativeMethods.ERROR_FILE_NOT_FOUND || error == UnsafeNativeMethods.ERROR_PIPE_BUSY)
{
if (lastAttempt)
{
Exception innerException = new PipeException(SR.GetString(SR.PipeConnectAddressFailed,
resolvedAddress, PipeError.GetErrorString(error)), error);
TimeoutException timeoutException;
string endpoint = remoteUri.AbsoluteUri;
if (error == UnsafeNativeMethods.ERROR_PIPE_BUSY)
{
timeoutException = new TimeoutException(SR.GetString(SR.PipeConnectTimedOutServerTooBusy,
endpoint, backoffHelper.OriginalTimeout), innerException);
}
else
{
timeoutException = new TimeoutException(SR.GetString(SR.PipeConnectTimedOut,
endpoint, backoffHelper.OriginalTimeout), innerException);
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(timeoutException);
}
return null;
}
else
{
PipeException innerException = new PipeException(SR.GetString(SR.PipeConnectAddressFailed,
resolvedAddress, PipeError.GetErrorString(error)), error);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateConnectFailedException(remoteUri, innerException));
}
}
public void Listen()
{
BackoffTimeoutHelper helper = new BackoffTimeoutHelper(TimeSpan.FromSeconds(1.0));
lock (this.ThisLock)
{
if (this.listenSocket != null)
{
this.listenSocket.Listen(this.settings.ListenBacklog);
this.isListening = true;
}
while (!this.isListening)
{
try
{
this.listenSocket = new Socket(this.localEndpoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
if ((this.localEndpoint.AddressFamily == AddressFamily.InterNetworkV6) && this.settings.TeredoEnabled)
{
this.listenSocket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPProtectionLevel, 10);
}
this.listenSocket.Bind(this.localEndpoint);
this.listenSocket.Listen(this.settings.ListenBacklog);
this.isListening = true;
continue;
}
catch (SocketException exception)
{
bool flag = false;
if ((exception.ErrorCode == 0x2740) && !helper.IsExpired())
{
helper.WaitAndBackoff();
flag = true;
}
if (!flag)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(ConvertListenException(exception, this.localEndpoint));
}
continue;
}
}
this.socketAsyncEventArgsPool = new SocketAsyncEventArgsPool(GetAcceptBufferSize(this.listenSocket));
}
}
void PrepareConnect(Uri remoteUri, TimeSpan timeout, out string resolvedAddress, out BackoffTimeoutHelper backoffHelper)
{
PipeUri.Validate(remoteUri);
if (DiagnosticUtility.ShouldTraceInformation)
{
TraceUtility.TraceEvent(System.Diagnostics.TraceEventType.Information, TraceCode.InitiatingNamedPipeConnection,
SR.GetString(SR.TraceCodeInitiatingNamedPipeConnection),
new StringTraceRecord("Uri", remoteUri.ToString()), this, null);
}
resolvedAddress = GetPipeName(remoteUri, this.pipeSettings);
const int backoffBufferMilliseconds = 150;
TimeSpan backoffTimeout;
if (timeout >= TimeSpan.FromMilliseconds(backoffBufferMilliseconds * 2))
{
backoffTimeout = TimeoutHelper.Add(timeout, TimeSpan.Zero - TimeSpan.FromMilliseconds(backoffBufferMilliseconds));
}
else
{
backoffTimeout = Ticks.ToTimeSpan((Ticks.FromMilliseconds(backoffBufferMilliseconds) / 2) + 1);
}
backoffHelper = new BackoffTimeoutHelper(backoffTimeout, TimeSpan.FromMinutes(5));
}
private ServiceControllerStatus ExitServiceStatus(ServiceController service, int pollMin, int pollMax, ServiceControllerStatus status)
{
ServiceControllerStatus status2;
BackoffTimeoutHelper helper = new BackoffTimeoutHelper(TimeSpan.MaxValue, TimeSpan.FromMilliseconds((double) pollMax), TimeSpan.FromMilliseconds((double) pollMin));
do
{
if (this.closed)
{
return service.Status;
}
helper.WaitAndBackoff();
service.Refresh();
status2 = service.Status;
}
while (status2 == status);
return status2;
}
private void ReconnectCallback(object state)
{
BackoffTimeoutHelper helper = new BackoffTimeoutHelper(TimeSpan.MaxValue, TimeSpan.FromMinutes(5.0), TimeSpan.FromSeconds(30.0));
while (this.state == CommunicationState.Opening)
{
try
{
this.StartListen(true);
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
if (DiagnosticUtility.ShouldTraceError)
{
DiagnosticUtility.ExceptionUtility.TraceHandledException(exception, TraceEventType.Error);
}
}
if (this.state == CommunicationState.Opening)
{
helper.WaitAndBackoff();
}
}
}
private IConnection TryConnect(Uri remoteUri, string resolvedAddress, BackoffTimeoutHelper backoffHelper)
{
bool flag = backoffHelper.IsExpired();
int dwFlagsAndAttributes = 0x40000000;
if (this.includeSecurityIdentity)
{
dwFlagsAndAttributes |= 0x110000;
}
PipeHandle handle = UnsafeNativeMethods.CreateFile(resolvedAddress, -1073741824, 0, IntPtr.Zero, 3, dwFlagsAndAttributes, IntPtr.Zero);
int errorCode = Marshal.GetLastWin32Error();
if (handle.IsInvalid)
{
handle.SetHandleAsInvalid();
}
else
{
int mode = 2;
if (UnsafeNativeMethods.SetNamedPipeHandleState(handle, ref mode, IntPtr.Zero, IntPtr.Zero) == 0)
{
errorCode = Marshal.GetLastWin32Error();
handle.Close();
PipeException exception = new PipeException(System.ServiceModel.SR.GetString("PipeModeChangeFailed", new object[] { PipeError.GetErrorString(errorCode) }), errorCode);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(this.CreateConnectFailedException(remoteUri, exception));
}
return new PipeConnection(handle, this.bufferSize, false, true);
}
if ((errorCode == 2) || (errorCode == 0xe7))
{
TimeoutException exception3;
if (!flag)
{
return null;
}
Exception exception2 = new PipeException(System.ServiceModel.SR.GetString("PipeConnectAddressFailed", new object[] { resolvedAddress, PipeError.GetErrorString(errorCode) }), errorCode);
string absoluteUri = remoteUri.AbsoluteUri;
if (errorCode == 0xe7)
{
exception3 = new TimeoutException(System.ServiceModel.SR.GetString("PipeConnectTimedOutServerTooBusy", new object[] { absoluteUri, backoffHelper.OriginalTimeout }), exception2);
}
else
{
exception3 = new TimeoutException(System.ServiceModel.SR.GetString("PipeConnectTimedOut", new object[] { absoluteUri, backoffHelper.OriginalTimeout }), exception2);
}
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(exception3);
}
PipeException innerException = new PipeException(System.ServiceModel.SR.GetString("PipeConnectAddressFailed", new object[] { resolvedAddress, PipeError.GetErrorString(errorCode) }), errorCode);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(this.CreateConnectFailedException(remoteUri, innerException));
}
private void PrepareConnect(Uri remoteUri, TimeSpan timeout, out string resolvedAddress, out BackoffTimeoutHelper backoffHelper)
{
TimeSpan span;
PipeUri.Validate(remoteUri);
if (DiagnosticUtility.ShouldTraceInformation)
{
TraceUtility.TraceEvent(TraceEventType.Information, 0x4002a, System.ServiceModel.SR.GetString("TraceCodeInitiatingNamedPipeConnection"), new StringTraceRecord("Uri", remoteUri.ToString()), this, null);
}
resolvedAddress = GetPipeName(remoteUri);
if (timeout >= TimeSpan.FromMilliseconds(300.0))
{
span = TimeoutHelper.Add(timeout, TimeSpan.Zero - TimeSpan.FromMilliseconds(150.0));
}
else
{
span = Ticks.ToTimeSpan((Ticks.FromMilliseconds(150) / 2L) + 1L);
}
backoffHelper = new BackoffTimeoutHelper(span, TimeSpan.FromMinutes(5.0));
}