internal extern static uint IcmpSendEcho2(SafeCloseIcmpHandle icmpHandle, SafeWaitHandle Event, IntPtr apcRoutine, IntPtr apcContext,
uint ipAddress, [In] SafeLocalAllocHandle data, ushort dataSize, ref IPOptions options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
internal extern static uint Icmp6SendEcho2(SafeCloseIcmpHandle icmpHandle, IntPtr Event, IntPtr apcRoutine, IntPtr apcContext,
byte[] sourceSocketAddress, byte[] destSocketAddress, [In] SafeLocalAllocHandle data, ushort dataSize, ref IPOptions options, SafeLocalAllocHandle replyBuffer, uint replySize, uint timeout);
internal static extern uint IcmpSendEcho2(SafeCloseIcmpHandle icmpHandle, SafeWaitHandle Event, IntPtr apcRoutine, IntPtr apcContext, uint ipAddress, [In] SafeLocalFree data, ushort dataSize, ref IPOptions options, SafeLocalFree replyBuffer, uint replySize, uint timeout);
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 static extern uint Icmp6SendEcho2(SafeCloseIcmpHandle icmpHandle, IntPtr Event, IntPtr apcRoutine, IntPtr apcContext, byte[] sourceSocketAddress, byte[] destSocketAddress, [In] SafeLocalFree data, ushort dataSize, ref IPOptions options, SafeLocalFree replyBuffer, uint replySize, uint timeout);
internal PingOptions(IPOptions options)
{
this.ttl = 0x80;
this.ttl = options.ttl;
this.dontFragment = (options.flags & 2) > 0;
}
// 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);
}
// 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;
}
internal PingOptions(IPOptions options)
{
this.ttl = 0x80;
this.ttl = options.ttl;
this.dontFragment = (options.flags & 2) > 0;
}