Inheritance: System.ComponentModel.Win32Exception
            private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
            {
                lock (s_callerArray)
                {
                    // Setup changedEvent and native overlapped struct.
                    if (s_ipv4Socket == null)
                    {
                        int blocking;

                        // Sockets will be initialized by the call to OSSupportsIP*.
                        if (Socket.OSSupportsIPv4)
                        {
                            blocking     = -1;
                            s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, (ProtocolType)0, true, false);
                            Interop.Winsock.ioctlsocket(s_ipv4Socket, Interop.Winsock.IoctlSocketConstants.FIONBIO, ref blocking);
                            s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
                        }

                        if (Socket.OSSupportsIPv6)
                        {
                            blocking     = -1;
                            s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, (ProtocolType)0, true, false);
                            Interop.Winsock.ioctlsocket(s_ipv6Socket, Interop.Winsock.IoctlSocketConstants.FIONBIO, ref blocking);
                            s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
                        }
                    }

                    if ((caller != null) && (!s_callerArray.ContainsKey(caller)))
                    {
                        s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
                    }

                    if (s_isListening || s_callerArray.Count == 0)
                    {
                        return;
                    }

                    if (!s_isPending)
                    {
                        int         length;
                        SocketError errorCode;

                        if (Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) != 0)
                        {
                            s_registeredWait = ThreadPool.RegisterWaitForSingleObject(
                                s_ipv4WaitHandle,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv4,
                                -1,
                                true);

                            errorCode = Interop.Winsock.WSAIoctl_Blocking(
                                s_ipv4Socket.DangerousGetHandle(),
                                (int)IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out length,
                                SafeNativeOverlapped.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success)
                            {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock)
                                {
                                    throw exception;
                                }
                            }

                            SafeWaitHandle s_ipv4SocketGetEventHandleSafeWaitHandle =
                                s_ipv4Socket.GetEventHandle().GetSafeWaitHandle();

                            errorCode = Interop.Winsock.WSAEventSelect(
                                s_ipv4Socket,
                                s_ipv4SocketGetEventHandleSafeWaitHandle,
                                Interop.Winsock.AsyncEventBits.FdAddressListChange);

                            if (errorCode != SocketError.Success)
                            {
                                throw new NetworkInformationException();
                            }
                        }

                        if (Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) != 0)
                        {
                            s_registeredWait = ThreadPool.RegisterWaitForSingleObject(
                                s_ipv6WaitHandle,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv6,
                                -1,
                                true);

                            errorCode = Interop.Winsock.WSAIoctl_Blocking(
                                s_ipv6Socket.DangerousGetHandle(),
                                (int)IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out length,
                                SafeNativeOverlapped.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success)
                            {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock)
                                {
                                    throw exception;
                                }
                            }

                            SafeWaitHandle s_ipv6SocketGetEventHandleSafeWaitHandle =
                                s_ipv6Socket.GetEventHandle().GetSafeWaitHandle();

                            errorCode = Interop.Winsock.WSAEventSelect(
                                s_ipv6Socket,
                                s_ipv6SocketGetEventHandleSafeWaitHandle,
                                Interop.Winsock.AsyncEventBits.FdAddressListChange);

                            if (errorCode != SocketError.Success)
                            {
                                throw new NetworkInformationException();
                            }
                        }
                    }

                    s_isListening = true;
                    s_isPending   = true;
                }
            }
            private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
            {
                lock (s_callerArray) {
                    // setup changedEvent and native overlapped struct.
                    if(s_ipv4Socket == null){
                        Socket.InitializeSockets();

                        int blocking;

                        if(Socket.OSSupportsIPv4){
                            blocking = -1;
                            s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, (ProtocolType)0, true, false);
                            UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, IoctlSocketConstants.FIONBIO,ref blocking);
                            s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
                        }

                        if(Socket.OSSupportsIPv6){
                            blocking = -1;
                            s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, (ProtocolType)0, true, false);
                            UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket,IoctlSocketConstants.FIONBIO,ref blocking);
                            s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
                        }
                    }

                    if ((caller != null) && (!s_callerArray.Contains(caller))) {
                        s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
                    }

                    //if s_listener is not null, it means we are already actively listening
                    if (s_isListening || s_callerArray.Count == 0) {
                        return;
                    }

                    if(!s_isPending){

                        int length;
                        SocketError errorCode;

                        if(Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) !=0){
                            s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(
                                s_ipv4WaitHandle,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv4,
                                -1,
                                true );

                            errorCode = (SocketError) UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
                                s_ipv4Socket.DangerousGetHandle(),
                                (int) IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out length,
                                SafeNativeOverlapped.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success) {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
                                    throw exception;
                                }
                            }

                            errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
                            if (errorCode != SocketError.Success) {
                               throw new NetworkInformationException();
                            }
                        }

                        if(Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) !=0){
                            s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(
                                s_ipv6WaitHandle,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv6,
                                -1,
                                true );

                            errorCode = (SocketError) UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
                                s_ipv6Socket.DangerousGetHandle(),
                                (int) IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out length,
                                SafeNativeOverlapped.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success) {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
                                    throw exception;
                                }
                            }

                            errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
                            if (errorCode != SocketError.Success) {
                               throw new NetworkInformationException();
                            }
                        }
                    }

                    s_isListening = true;
                    s_isPending = true;
                }
            }
            private static void StartHelper(NetworkAddressChangedEventHandler?caller, bool captureContext, StartIPOptions startIPOptions)
            {
                lock (s_globalLock)
                {
                    // Setup changedEvent and native overlapped struct.
                    if (s_ipv4Socket == null)
                    {
                        // Sockets will be initialized by the call to OSSupportsIP*.
                        if (Socket.OSSupportsIPv4)
                        {
                            s_ipv4Socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0)
                            {
                                Blocking = false
                            };
                            s_ipv4WaitHandle = new AutoResetEvent(false);
                        }

                        if (Socket.OSSupportsIPv6)
                        {
                            s_ipv6Socket = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, 0)
                            {
                                Blocking = false
                            };
                            s_ipv6WaitHandle = new AutoResetEvent(false);
                        }
                    }

                    if (caller != null)
                    {
                        s_addressChangedSubscribers.TryAdd(caller, captureContext ? ExecutionContext.Capture() : null);
                    }

                    if (s_isListening || s_addressChangedSubscribers.Count == 0)
                    {
                        return;
                    }

                    if (!s_isPending)
                    {
                        if (Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) != 0)
                        {
                            ThreadPool.RegisterWaitForSingleObject(
                                s_ipv4WaitHandle !,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv4,
                                -1,
                                true);

                            SocketError errorCode = Interop.Winsock.WSAIoctl_Blocking(
                                s_ipv4Socket !.SafeHandle,
                                (int)IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out int length,
                                IntPtr.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success)
                            {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock)
                                {
                                    throw exception;
                                }
                            }

                            errorCode = Interop.Winsock.WSAEventSelect(
                                s_ipv4Socket.SafeHandle,
                                s_ipv4WaitHandle !.GetSafeWaitHandle(),
                                Interop.Winsock.AsyncEventBits.FdAddressListChange);

                            if (errorCode != SocketError.Success)
                            {
                                throw new NetworkInformationException();
                            }
                        }

                        if (Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) != 0)
                        {
                            ThreadPool.RegisterWaitForSingleObject(
                                s_ipv6WaitHandle !,
                                new WaitOrTimerCallback(AddressChangedCallback),
                                StartIPOptions.StartIPv6,
                                -1,
                                true);

                            SocketError errorCode = Interop.Winsock.WSAIoctl_Blocking(
                                s_ipv6Socket !.SafeHandle,
                                (int)IOControlCode.AddressListChange,
                                null, 0, null, 0,
                                out int length,
                                IntPtr.Zero, IntPtr.Zero);

                            if (errorCode != SocketError.Success)
                            {
                                NetworkInformationException exception = new NetworkInformationException();
                                if (exception.ErrorCode != (uint)SocketError.WouldBlock)
                                {
                                    throw exception;
                                }
                            }

                            errorCode = Interop.Winsock.WSAEventSelect(
                                s_ipv6Socket.SafeHandle,
                                s_ipv6WaitHandle !.GetSafeWaitHandle(),
                                Interop.Winsock.AsyncEventBits.FdAddressListChange);

                            if (errorCode != SocketError.Success)
                            {
                                throw new NetworkInformationException();
                            }
                        }
                    }

                    s_isListening = true;
                    s_isPending   = true;
                }
            }
Exemple #4
0
        private unsafe void Setup(StartIPOptions startIPOptions)
        {
            int length;
            SocketError errorCode;


            if (Socket.OSSupportsIPv4 && (startIPOptions & StartIPOptions.StartIPv4) != 0){
                errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
                    ipv4Socket.DangerousGetHandle(),
                    (int) IOControlCode.AddressListChange,
                    null, 0, null, 0,
                    out length,
                    SafeNativeOverlapped.Zero, IntPtr.Zero);

                if (errorCode != SocketError.Success) {
                    NetworkInformationException exception = new NetworkInformationException();
                    if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
                        Dispose();
                        return;
                    }
                }

                errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(ipv4Socket, ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
                if (errorCode != SocketError.Success) {
                    Dispose();
                    return;
                }
            }

            if(Socket.OSSupportsIPv6 && (startIPOptions & StartIPOptions.StartIPv6) !=0){
                errorCode = (SocketError) UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(
                    ipv6Socket.DangerousGetHandle(),
                    (int) IOControlCode.AddressListChange,
                    null, 0, null, 0,
                    out length,
                    SafeNativeOverlapped.Zero, IntPtr.Zero);

                if (errorCode != SocketError.Success) {
                    NetworkInformationException exception = new NetworkInformationException();
                    if (exception.ErrorCode != (uint)SocketError.WouldBlock) {
                        Dispose();
                        return;
                    }
                }

                errorCode = (SocketError)UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(ipv6Socket, ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange);
                if (errorCode != SocketError.Success) {
                    Dispose();
                    return;
                }
            }
        }
Exemple #5
0
 private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
 {
     lock (s_callerArray)
     {
         if (s_ipv4Socket == null)
         {
             int num;
             Socket.InitializeSockets();
             if (Socket.OSSupportsIPv4)
             {
                 num          = -1;
                 s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.IP, true, false);
                 UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, -2147195266, ref num);
                 s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
             }
             if (Socket.OSSupportsIPv6)
             {
                 num          = -1;
                 s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.IP, true, false);
                 UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket, -2147195266, ref num);
                 s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
             }
         }
         if ((caller != null) && !s_callerArray.Contains(caller))
         {
             s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
         }
         if (!s_isListening && (s_callerArray.Count != 0))
         {
             if (!s_isPending)
             {
                 int num2;
                 if (Socket.OSSupportsIPv4 && ((startIPOptions & StartIPOptions.StartIPv4) != StartIPOptions.None))
                 {
                     s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv4WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv4, -1, true);
                     if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv4Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
                     {
                         NetworkInformationException exception = new NetworkInformationException();
                         if (exception.ErrorCode != 0x2733L)
                         {
                             throw exception;
                         }
                     }
                     if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
                     {
                         throw new NetworkInformationException();
                     }
                 }
                 if (Socket.OSSupportsIPv6 && ((startIPOptions & StartIPOptions.StartIPv6) != StartIPOptions.None))
                 {
                     s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv6WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv6, -1, true);
                     if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv6Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
                     {
                         NetworkInformationException exception2 = new NetworkInformationException();
                         if (exception2.ErrorCode != 0x2733L)
                         {
                             throw exception2;
                         }
                     }
                     if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
                     {
                         throw new NetworkInformationException();
                     }
                 }
             }
             s_isListening = true;
             s_isPending   = true;
         }
     }
 }
 private void Setup(StartIPOptions startIPOptions)
 {
     int num;
     if (Socket.OSSupportsIPv4 && ((startIPOptions & StartIPOptions.StartIPv4) != StartIPOptions.None))
     {
         if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(this.ipv4Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
         {
             NetworkInformationException exception = new NetworkInformationException();
             if (exception.ErrorCode != 0x2733L)
             {
                 this.Dispose();
                 return;
             }
         }
         if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(this.ipv4Socket, this.ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
         {
             this.Dispose();
             return;
         }
     }
     if (Socket.OSSupportsIPv6 && ((startIPOptions & StartIPOptions.StartIPv6) != StartIPOptions.None))
     {
         if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(this.ipv6Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
         {
             NetworkInformationException exception2 = new NetworkInformationException();
             if (exception2.ErrorCode != 0x2733L)
             {
                 this.Dispose();
                 return;
             }
         }
         if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(this.ipv6Socket, this.ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
         {
             this.Dispose();
         }
     }
 }
			public WrapperNetworkInformationException( NetworkInformationException inner )
				: base( inner.ErrorCode )
			{
				this._innerStackTrace = inner.StackTrace;
			}
		public void TestNetworkInformationException()
		{
			var value = new NetworkInformationException( 12345 );
			try
			{
				ExceptionDispatchInfo.Capture( value ).Throw();
			}
			catch ( NetworkInformationException ex )
			{
				Assert.That( ex, Is.Not.SameAs( value ) );
				Assert.That( ex.ErrorCode, Is.EqualTo( value.ErrorCode ) );
			}
		}
 private static void StartHelper(NetworkAddressChangedEventHandler caller, bool captureContext, StartIPOptions startIPOptions)
 {
     lock (s_callerArray)
     {
         if (s_ipv4Socket == null)
         {
             int num;
             Socket.InitializeSockets();
             if (Socket.OSSupportsIPv4)
             {
                 num = -1;
                 s_ipv4Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.IP, true, false);
                 UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv4Socket, -2147195266, ref num);
                 s_ipv4WaitHandle = s_ipv4Socket.GetEventHandle();
             }
             if (Socket.OSSupportsIPv6)
             {
                 num = -1;
                 s_ipv6Socket = SafeCloseSocketAndEvent.CreateWSASocketWithEvent(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.IP, true, false);
                 UnsafeNclNativeMethods.OSSOCK.ioctlsocket(s_ipv6Socket, -2147195266, ref num);
                 s_ipv6WaitHandle = s_ipv6Socket.GetEventHandle();
             }
         }
         if ((caller != null) && !s_callerArray.Contains(caller))
         {
             s_callerArray.Add(caller, captureContext ? ExecutionContext.Capture() : null);
         }
         if (!s_isListening && (s_callerArray.Count != 0))
         {
             if (!s_isPending)
             {
                 int num2;
                 if (Socket.OSSupportsIPv4 && ((startIPOptions & StartIPOptions.StartIPv4) != StartIPOptions.None))
                 {
                     s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv4WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv4, -1, true);
                     if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv4Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
                     {
                         NetworkInformationException exception = new NetworkInformationException();
                         if (exception.ErrorCode != 0x2733L)
                         {
                             throw exception;
                         }
                     }
                     if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv4Socket, s_ipv4Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
                     {
                         throw new NetworkInformationException();
                     }
                 }
                 if (Socket.OSSupportsIPv6 && ((startIPOptions & StartIPOptions.StartIPv6) != StartIPOptions.None))
                 {
                     s_registeredWait = ThreadPool.UnsafeRegisterWaitForSingleObject(s_ipv6WaitHandle, new WaitOrTimerCallback(NetworkChange.AddressChangeListener.AddressChangedCallback), StartIPOptions.StartIPv6, -1, true);
                     if (UnsafeNclNativeMethods.OSSOCK.WSAIoctl_Blocking(s_ipv6Socket.DangerousGetHandle(), 0x28000017, null, 0, null, 0, out num2, SafeNativeOverlapped.Zero, IntPtr.Zero) != SocketError.Success)
                     {
                         NetworkInformationException exception2 = new NetworkInformationException();
                         if (exception2.ErrorCode != 0x2733L)
                         {
                             throw exception2;
                         }
                     }
                     if (UnsafeNclNativeMethods.OSSOCK.WSAEventSelect(s_ipv6Socket, s_ipv6Socket.GetEventHandle().SafeWaitHandle, AsyncEventBits.FdAddressListChange) != SocketError.Success)
                     {
                         throw new NetworkInformationException();
                     }
                 }
             }
             s_isListening = true;
             s_isPending = true;
         }
     }
 }