public void Start()
{
try
{
var signal = new ManualResetEvent(false);
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
IPv4InterfaceProperties selectedInterface = null;
foreach (NetworkInterface adapter in nics)
{
IPInterfaceProperties ip_properties = adapter.GetIPProperties();
if (adapter.GetIPProperties().MulticastAddresses.Count == 0)
{
continue; // most of VPN adapters will be skipped
}
if (OperationalStatus.Up != adapter.OperationalStatus)
{
continue; // this adapter is off or not connected
}
IPv4InterfaceProperties p = adapter.GetIPProperties().GetIPv4Properties();
if (null == p)
{
continue; // IPv4 is not configured on this adapter
}
selectedInterface = p;
break;
}
Console.WriteLine($"Bound to {selectedInterface.ToString()}");
var ipAddress = "192.168.86.111";
IPAddress multicastAddress = IPAddress.Parse("224.0.0.251");
IPEndPoint multicastEndpoint = new IPEndPoint(multicastAddress, 5353);
IPAddress localAddress = IPAddress.Parse(ipAddress);
//EndPoint localEndpoint = new IPEndPoint(IPAddress.Any, 5353);
EndPoint localEndpoint = new IPEndPoint(localAddress, 5353);
EndPoint senderRemote = new IPEndPoint(IPAddress.Any, 0);
using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
{
socket.EnableBroadcast = true;
socket.ExclusiveAddressUse = false;
socket.MulticastLoopback = true;
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, 1);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastInterface, (int)IPAddress.HostToNetworkOrder(selectedInterface.Index));
socket.Bind(localEndpoint);
socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(multicastAddress, IPAddress.Any));
while (true)
{
try
{
var buffer = new byte[2048];
int numberOfbytesReceived = socket.ReceiveFrom(buffer, ref senderRemote);
var content = new byte[numberOfbytesReceived];
Array.Copy(buffer, 0, content, 0, numberOfbytesReceived);
ByteArrayToStringDump(content);
if (content[2] != 0x00)
{
Console.WriteLine("Not a query. Ignoring.");
continue;
}
// Build the header that indicates this is a response.
//
var outputBuffer = new byte[0];
var flags = new byte[2];
var bitArray = new BitArray(flags);
// We're using 15 and 10 since the Endianness of this bytes is reversed :)
//
bitArray.Set(15, true); // QR
bitArray.Set(10, true); // AA
bitArray.CopyTo(flags, 0);
var questionCount = BitConverter.GetBytes((short)1).Reverse().ToArray();
var answerCount = BitConverter.GetBytes((short)4).Reverse().ToArray();
var additionalCounts = BitConverter.GetBytes((short)1).Reverse().ToArray();
var otherCounts = BitConverter.GetBytes((short)0).Reverse().ToArray();
// Add the header to the output buffer.
//
outputBuffer = outputBuffer.Concat(otherCounts).Concat(flags.Reverse()).Concat(questionCount).Concat(answerCount).Concat(otherCounts).Concat(additionalCounts).ToArray();
int endOfHeaderBufferLength = outputBuffer.Length;
var nodeName = GetName("_services._dns-sd._udp.local");
outputBuffer = outputBuffer.Concat(nodeName).ToArray();
var typeBytes = BitConverter.GetBytes((short)12).Reverse().ToArray(); // PTR
outputBuffer = outputBuffer.Concat(typeBytes).ToArray();
var @class = BitConverter.GetBytes((short)1).Reverse().ToArray(); // Internet
outputBuffer = outputBuffer.Concat(@class).ToArray();
Dictionary <string, string> values = new Dictionary <string, string>();
values.Add("sf", "1");
values.Add("ff", "0x00");
values.Add("ci", "2");
values.Add("id", "C5:22:3D:E3:CE:D6");
values.Add("md", "Climenole");
values.Add("s#", "1");
values.Add("c#", "678");
outputBuffer = AddTxt(outputBuffer, "Jarvis._hap._tcp.local", values);
outputBuffer = AddPtr(outputBuffer, "_services._dns-sd._udp.local", "_hap._tcp.local");
outputBuffer = AddPtr(outputBuffer, "_hap._tcp.local", "Jarvis._hap._tcp.local");
outputBuffer = AddSrv(outputBuffer, "Jarvis._hap._tcp.local", 0, 0, 51826, "Surface.local");
outputBuffer = AddARecord(outputBuffer, "Surface.local", "A", ipAddress);
ByteArrayToStringDump(outputBuffer);
Thread.Sleep(50);
var bytesSent = socket.SendTo(outputBuffer, 0, outputBuffer.Length, SocketFlags.None, senderRemote);
Console.WriteLine($"Wrote {bytesSent}");
}
catch (Exception exp)
{
Console.WriteLine(exp.Message);
}
}
}
}
catch (Exception exp)
{
Console.WriteLine(exp.Message);
if (exp.InnerException != null)
{
Console.WriteLine(exp.InnerException.Message);
}
}
}
