//private callback invoked when icmpsendecho apis succeed private static void PingCallback(object state, bool signaled) { Ping ping = (Ping)state; PingCompletedEventArgs eventArgs = null; bool cancelled = false; AsyncOperation asyncOp = null; SendOrPostCallback onPingCompletedDelegate = null; try { lock (ping.lockObject) { cancelled = ping.cancelled; asyncOp = ping.asyncOp; onPingCompletedDelegate = ping.onPingCompletedDelegate; if (!cancelled) { //parse reply buffer SafeLocalFree buffer = ping.replyBuffer; //marshals and constructs new reply PingReply reply; if (ping.ipv6) { Icmp6EchoReply icmp6Reply = (Icmp6EchoReply)Marshal.PtrToStructure(buffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(icmp6Reply, buffer.DangerousGetHandle(), ping.sendSize); } else { IcmpEchoReply icmpReply = (IcmpEchoReply)Marshal.PtrToStructure(buffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(icmpReply); } eventArgs = new PingCompletedEventArgs(reply, null, false, asyncOp.UserSuppliedState); } else //cancelled { eventArgs = new PingCompletedEventArgs(null, null, true, asyncOp.UserSuppliedState); } } } // in case of failure, create a failed event arg catch (Exception e) { PingException pe = new PingException(SR.GetString(SR.net_ping), e); eventArgs = new PingCompletedEventArgs(null, pe, false, asyncOp.UserSuppliedState); } finally { ping.FreeUnmanagedStructures(); ping.UnregisterWaitHandle(); ping.Finish(true); } asyncOp.PostOperationCompleted(onPingCompletedDelegate, eventArgs); }
private static void PingCallback(object state, bool signaled) { Ping ping = (Ping)state; PingCompletedEventArgs arg = null; bool cancelled = false; AsyncOperation asyncOp = null; SendOrPostCallback d = null; try { lock (ping.lockObject) { cancelled = ping.cancelled; asyncOp = ping.asyncOp; d = ping.onPingCompletedDelegate; if (!cancelled) { PingReply reply; SafeLocalFree replyBuffer = ping.replyBuffer; if (!ping.ipv6 && !ComNetOS.IsVista) { UnsafeNetInfoNativeMethods.IcmpParseReplies(replyBuffer.DangerousGetHandle(), 0x100ff); } if (ping.ipv6) { Icmp6EchoReply reply2 = (Icmp6EchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(reply2, replyBuffer.DangerousGetHandle(), ping.sendSize); } else { IcmpEchoReply reply3 = (IcmpEchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(reply3); } arg = new PingCompletedEventArgs(reply, null, false, asyncOp.UserSuppliedState); } else { arg = new PingCompletedEventArgs(null, null, true, asyncOp.UserSuppliedState); } } } catch (Exception exception) { PingException error = new PingException(SR.GetString("net_ping"), exception); arg = new PingCompletedEventArgs(null, error, false, asyncOp.UserSuppliedState); } finally { ping.FreeUnmanagedStructures(); ping.UnregisterWaitHandle(); ping.Finish(true); } asyncOp.PostOperationCompleted(d, arg); }
// the main constructor for the icmpsendecho apis internal PingReply (IcmpEchoReply reply) { address = new IPAddress (reply.address); ipStatus = (IPStatus)reply.status; //the icmpsendecho ip status codes //only copy the data if we succeed w/ the ping operation if (ipStatus == IPStatus.Success) { rtt = (long)reply.roundTripTime; buffer = new byte[reply.dataSize]; Marshal.Copy (reply.data, buffer, 0, reply.dataSize); options = new PingOptions (reply.options); } else buffer = new byte[0]; }
internal PingReply(IcmpEchoReply reply) { this.address = new IPAddress((long)reply.address); this.ipStatus = (IPStatus)reply.status; if (this.ipStatus == IPStatus.Success) { this.rtt = reply.roundTripTime; this.buffer = new byte[reply.dataSize]; Marshal.Copy(reply.data, this.buffer, 0, reply.dataSize); this.options = new PingOptions(reply.options); } else { this.buffer = new byte[0]; } }
internal PingReply(IcmpEchoReply reply) { this.address = new IPAddress((long) reply.address); this.ipStatus = (IPStatus) reply.status; if (this.ipStatus == IPStatus.Success) { this.rtt = reply.roundTripTime; this.buffer = new byte[reply.dataSize]; Marshal.Copy(reply.data, this.buffer, 0, reply.dataSize); this.options = new PingOptions(reply.options); } else { this.buffer = new byte[0]; } }
// the main constructor for the icmpsendecho apis internal PingReply(IcmpEchoReply reply) { address = new IPAddress(reply.address); ipStatus = (IPStatus)reply.status; //the icmpsendecho ip status codes //only copy the data if we succeed w/ the ping operation if (ipStatus == IPStatus.Success) { rtt = (long)reply.roundTripTime; buffer = new byte[reply.dataSize]; Marshal.Copy(reply.data, buffer, 0, reply.dataSize); options = new PingOptions(reply.options); } else { buffer = new byte[0]; } }
private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options, bool async) { int num; PingReply reply; this.ipv6 = address.AddressFamily == AddressFamily.InterNetworkV6; this.sendSize = buffer.Length; if (!this.ipv6 && (this.handlePingV4 == null)) { this.handlePingV4 = UnsafeNetInfoNativeMethods.IcmpCreateFile(); if (this.handlePingV4.IsInvalid) { this.handlePingV4 = null; throw new Win32Exception(); } } else if (this.ipv6 && (this.handlePingV6 == null)) { this.handlePingV6 = UnsafeNetInfoNativeMethods.Icmp6CreateFile(); if (this.handlePingV6.IsInvalid) { this.handlePingV6 = null; throw new Win32Exception(); } } IPOptions options2 = new IPOptions(options); if (this.replyBuffer == null) { this.replyBuffer = SafeLocalFree.LocalAlloc(0x100ff); } try { if (async) { if (this.pingEvent == null) { this.pingEvent = new ManualResetEvent(false); } else { this.pingEvent.Reset(); } this.registeredWait = ThreadPool.RegisterWaitForSingleObject(this.pingEvent, new WaitOrTimerCallback(Ping.PingCallback), this, -1, true); } this.SetUnmanagedStructures(buffer); if (!this.ipv6) { if (async) { num = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(this.handlePingV4, this.pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } else { num = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(this.handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } } else { SocketAddress address2 = new IPEndPoint(address, 0).Serialize(); byte[] sourceSocketAddress = new byte[0x1c]; if (async) { num = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(this.handlePingV6, this.pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, sourceSocketAddress, address2.m_Buffer, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } else { num = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(this.handlePingV6, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, sourceSocketAddress, address2.m_Buffer, this.requestBuffer, (ushort)buffer.Length, ref options2, this.replyBuffer, 0x100ff, (uint)timeout); } } } catch { this.UnregisterWaitHandle(); throw; } if (num == 0) { num = Marshal.GetLastWin32Error(); if (async && (num == 0x3e5L)) { return(null); } this.FreeUnmanagedStructures(); this.UnregisterWaitHandle(); if ((async || (num < 0x2afa)) || (num > 0x2b25)) { throw new Win32Exception(num); } return(new PingReply((IPStatus)num)); } if (async) { return(null); } this.FreeUnmanagedStructures(); if (this.ipv6) { Icmp6EchoReply reply2 = (Icmp6EchoReply)Marshal.PtrToStructure(this.replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(reply2, this.replyBuffer.DangerousGetHandle(), this.sendSize); } else { IcmpEchoReply reply3 = (IcmpEchoReply)Marshal.PtrToStructure(this.replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(reply3); } GC.KeepAlive(this.replyBuffer); return(reply); }
// internal method responsible for sending echo request on win2k and higher private PingReply InternalSend(IPAddress address, byte[] buffer, int timeout, PingOptions options, bool async) { ipv6 = (address.AddressFamily == AddressFamily.InterNetworkV6)?true:false; sendSize = buffer.Length; //get and cache correct handle if (!ipv6 && handlePingV4 == null) { handlePingV4 = UnsafeNetInfoNativeMethods.IcmpCreateFile(); if (handlePingV4.IsInvalid) { handlePingV4 = null; throw new Win32Exception(); // Gets last error } } else if (ipv6 && handlePingV6 == null) { handlePingV6 = UnsafeNetInfoNativeMethods.Icmp6CreateFile(); if (handlePingV6.IsInvalid) { handlePingV6 = null; throw new Win32Exception(); // Gets last error } } //setup the options IPOptions ipOptions = new IPOptions(options); //setup the reply buffer if (replyBuffer == null) { replyBuffer = SafeLocalFree.LocalAlloc(MaxUdpPacket); } //queue the event int error; try { if (async) { if (pingEvent == null) { pingEvent = new ManualResetEvent(false); } else { pingEvent.Reset(); } registeredWait = ThreadPool.RegisterWaitForSingleObject(pingEvent, new WaitOrTimerCallback(PingCallback), this, -1, true); } //Copy user dfata into the native world SetUnmanagedStructures(buffer); if (!ipv6) { if (async) { error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(handlePingV4, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else { error = (int)UnsafeNetInfoNativeMethods.IcmpSendEcho2(handlePingV4, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, (uint)address.m_Address, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } else { IPEndPoint ep = new IPEndPoint(address, 0); SocketAddress remoteAddr = ep.Serialize(); byte[] sourceAddr = new byte[28]; if (async) { error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(handlePingV6, pingEvent.SafeWaitHandle, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } else { error = (int)UnsafeNetInfoNativeMethods.Icmp6SendEcho2(handlePingV6, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, sourceAddr, remoteAddr.m_Buffer, requestBuffer, (ushort)buffer.Length, ref ipOptions, replyBuffer, MaxUdpPacket, (uint)timeout); } } } catch { UnregisterWaitHandle(); throw; } //need this if something is bogus. if (error == 0) { error = (int)Marshal.GetLastWin32Error(); // Only skip Async IO Pending error value if (async && error == UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING) { return(null); // Expected async return value } // Cleanup FreeUnmanagedStructures(); UnregisterWaitHandle(); if (async || // No IPStatus async errors error < (int)IPStatus.DestinationNetworkUnreachable || // Min error > (int)IPStatus.DestinationScopeMismatch) // Max // Out of IPStatus range { throw new Win32Exception(error); } return(new PingReply((IPStatus)error)); // Synchronous IPStatus errors } if (async) { return(null); } FreeUnmanagedStructures(); //return the reply PingReply reply; if (ipv6) { Icmp6EchoReply icmp6Reply = (Icmp6EchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(Icmp6EchoReply)); reply = new PingReply(icmp6Reply, replyBuffer.DangerousGetHandle(), sendSize); } else { IcmpEchoReply icmpReply = (IcmpEchoReply)Marshal.PtrToStructure(replyBuffer.DangerousGetHandle(), typeof(IcmpEchoReply)); reply = new PingReply(icmpReply); } // IcmpEchoReply still has an unsafe IntPtr reference into replybuffer // and replybuffer was being freed prematurely by the GC, causing AccessViolationExceptions. GC.KeepAlive(replyBuffer); return(reply); }