/// <summary>
/// IN: Requires the IpAddress field to be filled.
/// OUT: Will fill MacAddress field on success. Otherwise, MacAddress will be cleared to null.
/// </summary>
/// <returns>Function delegate.</returns>
public static Func <WorkerContext, WorkerContext> GetMacWorker() => (ctx) =>
{
try
{
// If the previous did not return OK, fail.
if (ctx.s != StatusCode.OK)
{
throw new Exception();
}
// Get MAC Address
IPAddress ip;
IPAddress.TryParse(((NetworkWorkerObject)ctx.o).IpAddress, out ip);
string mac = ArpRequest.Send(ip).Address.ToString();
// Normalize address
mac = Regex.Replace(mac, @"[^0-9A-Fa-f]", "");
mac = Regex.Replace(mac, ".{2}", "$0:");
mac = mac.TrimEnd(':');
((NetworkWorkerObject)ctx.o).MacAddress = mac;
ctx.s = StatusCode.OK;
return(ctx);
}
catch (Exception)
{
// Set to null and fail
((NetworkWorkerObject)ctx.o).MacAddress = null;
ctx.s = StatusCode.FAILED;
return(ctx);
}
};
private void MessageArrived(string subject, ref bool isHandled)
{
var cmdMatch = Regex.Match(subject, @"^Command WOL (.+?) (.+?)$");
if (!cmdMatch.Success)
{
return;
}
var ipText = cmdMatch.Groups[1].Value;
var macText = cmdMatch.Groups[2].Value;
Console.WriteLine($"Handling WOL to {ipText} {macText}");
try
{
var ip = IPAddress.Parse(ipText);
PhysicalAddress macAddress;
if (string.IsNullOrEmpty(macText))
{
if (Environment.OSVersion.Platform != PlatformID.Win32NT)
{
throw new InvalidOperationException("MAC adress is required on Non-Windows OS");
}
ArpRequestResult res = ArpRequest.Send(ip);
if (res.Exception != null)
{
ExceptionDispatchInfo.Capture(res.Exception).Throw();
#pragma warning disable CS8597 // Never happens due to ExceptionDispatchInfo throwing.
throw null;
#pragma warning restore CS8597
}
else
{
macAddress = res.Address;
}
}
else
{
macAddress = PhysicalAddress.Parse(macText);
}
macAddress.SendWol(ip);
var mask = new NetMask(255, 255, 255, 0);
var broadcastAddress = ip.GetBroadcastAddress(mask);
IPAddress.Broadcast.SendWol(macAddress);
isHandled = true;
}
catch (Exception ex)
{
Console.WriteLine("Problem with WOL: " + ex.Message);
isHandled = false;
}
}