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);
}