Example #1
0
        partial void InternalDisposeCore()
        {
            if (_handlePingV4 != null)
            {
                _handlePingV4.Dispose();
                _handlePingV4 = null;
            }

            if (_handlePingV6 != null)
            {
                _handlePingV6.Dispose();
                _handlePingV6 = null;
            }

            UnregisterWaitHandle();

            if (_pingEvent != null)
            {
                _pingEvent.Dispose();
                _pingEvent = null;
            }

            if (_replyBuffer != null)
            {
                _replyBuffer.Dispose();
                _replyBuffer = null;
            }
        }
Example #2
0
 private void InitialiseIcmpHandle()
 {
     if (!_ipv6 && _handlePingV4 == null)
     {
         _handlePingV4 = Interop.IpHlpApi.IcmpCreateFile();
         if (_handlePingV4.IsInvalid)
         {
             _handlePingV4 = null;
             throw new Win32Exception(); // Gets last error.
         }
     }
     else if (_ipv6 && _handlePingV6 == null)
     {
         _handlePingV6 = Interop.IpHlpApi.Icmp6CreateFile();
         if (_handlePingV6.IsInvalid)
         {
             _handlePingV6 = null;
             throw new Win32Exception(); // Gets last error.
         }
     }
 }
Example #3
0
        /*private*/ partial void InternalDisposeCore()
        {
            if (_handlePingV4 != null)
            {
                _handlePingV4.Dispose();
                _handlePingV4 = null;
            }

            if (_handlePingV6 != null)
            {
                _handlePingV6.Dispose();
                _handlePingV6 = null;
            }

            UnregisterWaitHandle();

            if (_pingEvent != null)
            {
                _pingEvent.Dispose();
                _pingEvent = null;
            }

            if (_replyBuffer != null)
            {
                _replyBuffer.Dispose();
                _replyBuffer = null;
            }
        }
Example #4
0
        // Any exceptions that escape synchronously will be caught by the caller and wrapped in a PingException.
        // We do not need to or want to capture such exceptions into the returned task.
        private Task<PingReply> SendPingAsyncCore(IPAddress address, byte[] buffer, int timeout, PingOptions options)
        {
            var tcs = new TaskCompletionSource<PingReply>();
            _taskCompletionSource = tcs;

            _ipv6 = (address.AddressFamily == AddressFamily.InterNetworkV6);
            _sendSize = buffer.Length;

            // Get and cache correct handle.
            if (!_ipv6 && _handlePingV4 == null)
            {
                _handlePingV4 = Interop.IpHlpApi.IcmpCreateFile();
                if (_handlePingV4.IsInvalid)
                {
                    _handlePingV4 = null;
                    throw new Win32Exception(); // Gets last error.
                }
            }
            else if (_ipv6 && _handlePingV6 == null)
            {
                _handlePingV6 = Interop.IpHlpApi.Icmp6CreateFile();
                if (_handlePingV6.IsInvalid)
                {
                    _handlePingV6 = null;
                    throw new Win32Exception(); // Gets last error.
                }
            }

            var ipOptions = new Interop.IpHlpApi.IPOptions(options);

            if (_replyBuffer == null)
            {
                _replyBuffer = SafeLocalAllocHandle.LocalAlloc(MaxUdpPacket);
            }

            // Queue the event.
            int error;
            try
            {
                if (_pingEvent == null)
                {
                    _pingEvent = new ManualResetEvent(false);
                }
                else
                {
                    _pingEvent.Reset();
                }

                _registeredWait = ThreadPool.RegisterWaitForSingleObject(_pingEvent, (state, _) => ((Ping)state).PingCallback(), this, -1, true);

                SetUnmanagedStructures(buffer);

                if (!_ipv6)
                {
                    SafeWaitHandle pingEventSafeWaitHandle = _pingEvent.GetSafeWaitHandle();
                    error = (int)Interop.IpHlpApi.IcmpSendEcho2(
                        _handlePingV4,
                        pingEventSafeWaitHandle,
                        IntPtr.Zero,
                        IntPtr.Zero,
                        (uint)address.GetAddress(),
                        _requestBuffer,
                        (ushort)buffer.Length,
                        ref ipOptions,
                        _replyBuffer,
                        MaxUdpPacket,
                        (uint)timeout);
                }
                else
                {
                    IPEndPoint ep = new IPEndPoint(address, 0);
                    Internals.SocketAddress remoteAddr = IPEndPointExtensions.Serialize(ep);
                    byte[] sourceAddr = new byte[28];

                    SafeWaitHandle pingEventSafeWaitHandle = _pingEvent.GetSafeWaitHandle();
                    error = (int)Interop.IpHlpApi.Icmp6SendEcho2(
                        _handlePingV6,
                        pingEventSafeWaitHandle,
                        IntPtr.Zero,
                        IntPtr.Zero,
                        sourceAddr,
                        remoteAddr.Buffer,
                        _requestBuffer,
                        (ushort)buffer.Length,
                        ref ipOptions,
                        _replyBuffer,
                        MaxUdpPacket,
                        (uint)timeout);
                }
            }
            catch
            {
                UnregisterWaitHandle();
                throw;
            }

            if (error == 0)
            {
                error = Marshal.GetLastWin32Error();

                // Only skip Async IO Pending error value.
                if (error != Interop.IpHlpApi.ERROR_IO_PENDING)
                {
                    // Cleanup.
                    FreeUnmanagedStructures();
                    UnregisterWaitHandle();

                    throw new Win32Exception(error);
                }
            }

            return tcs.Task;
        }
Example #5
0
        // Any exceptions that escape synchronously will be caught by the caller and wrapped in a PingException.
        // We do not need to or want to capture such exceptions into the returned task.
        private Task <PingReply> SendPingAsyncCore(IPAddress address, byte[] buffer, int timeout, PingOptions options)
        {
            var tcs = new TaskCompletionSource <PingReply>();

            _taskCompletionSource = tcs;

            _ipv6     = (address.AddressFamily == AddressFamily.InterNetworkV6);
            _sendSize = buffer.Length;

            // Get and cache correct handle.
            if (!_ipv6 && _handlePingV4 == null)
            {
                _handlePingV4 = Interop.IpHlpApi.IcmpCreateFile();
                if (_handlePingV4.IsInvalid)
                {
                    _handlePingV4 = null;
                    throw new Win32Exception(); // Gets last error.
                }
            }
            else if (_ipv6 && _handlePingV6 == null)
            {
                _handlePingV6 = Interop.IpHlpApi.Icmp6CreateFile();
                if (_handlePingV6.IsInvalid)
                {
                    _handlePingV6 = null;
                    throw new Win32Exception(); // Gets last error.
                }
            }

            var ipOptions = new Interop.IpHlpApi.IPOptions(options);

            if (_replyBuffer == null)
            {
                _replyBuffer = SafeLocalAllocHandle.LocalAlloc(MaxUdpPacket);
            }

            // Queue the event.
            int error;

            try
            {
                if (_pingEvent == null)
                {
                    _pingEvent = new ManualResetEvent(false);
                }
                else
                {
                    _pingEvent.Reset();
                }

                _registeredWait = ThreadPool.RegisterWaitForSingleObject(_pingEvent, (state, _) => ((Ping)state).PingCallback(), this, -1, true);

                SetUnmanagedStructures(buffer);

                if (!_ipv6)
                {
                    SafeWaitHandle pingEventSafeWaitHandle = _pingEvent.GetSafeWaitHandle();
                    error = (int)Interop.IpHlpApi.IcmpSendEcho2(
                        _handlePingV4,
                        pingEventSafeWaitHandle,
                        IntPtr.Zero,
                        IntPtr.Zero,
                        (uint)address.GetAddress(),
                        _requestBuffer,
                        (ushort)buffer.Length,
                        ref ipOptions,
                        _replyBuffer,
                        MaxUdpPacket,
                        (uint)timeout);
                }
                else
                {
                    IPEndPoint ep = new IPEndPoint(address, 0);
                    Internals.SocketAddress remoteAddr = IPEndPointExtensions.Serialize(ep);
                    byte[] sourceAddr = new byte[28];

                    SafeWaitHandle pingEventSafeWaitHandle = _pingEvent.GetSafeWaitHandle();
                    error = (int)Interop.IpHlpApi.Icmp6SendEcho2(
                        _handlePingV6,
                        pingEventSafeWaitHandle,
                        IntPtr.Zero,
                        IntPtr.Zero,
                        sourceAddr,
                        remoteAddr.Buffer,
                        _requestBuffer,
                        (ushort)buffer.Length,
                        ref ipOptions,
                        _replyBuffer,
                        MaxUdpPacket,
                        (uint)timeout);
                }
            }
            catch
            {
                UnregisterWaitHandle();
                throw;
            }

            if (error == 0)
            {
                error = Marshal.GetLastWin32Error();

                // Only skip Async IO Pending error value.
                if (error != Interop.IpHlpApi.ERROR_IO_PENDING)
                {
                    // Cleanup.
                    FreeUnmanagedStructures();
                    UnregisterWaitHandle();

                    throw new Win32Exception(error);
                }
            }

            return(tcs.Task);
        }