/// <summary>
/// A method to find all of the local UDP servers and clients on the network
/// </summary>
public static void RefreshLocalUdpListings(ushort portNumber = DEFAULT_PORT, int responseBuffer = 1000)
{
// Initialize the list to hold all of the local network endpoints that respond to the request
if (LocalEndpoints == null)
{
LocalEndpoints = new List <BroadcastEndpoints>();
}
// Make sure to clear out the existing endpoints
lock (LocalEndpoints)
{
LocalEndpoints.Clear();
}
// Create a client to write on the network and discover other clients and servers
localListingsClient = new CachedUdpClient(19375);
localListingsClient.EnableBroadcast = true;
Task.Queue(() => { CloseLocalListingsClient(); }, responseBuffer);
Task.Queue(() =>
{
IPEndPoint groupEp = default(IPEndPoint);
string endpoint = string.Empty;
localListingsClient.Send(new byte[] { BROADCAST_LISTING_REQUEST_1, BROADCAST_LISTING_REQUEST_2, BROADCAST_LISTING_REQUEST_3 }, 3, new IPEndPoint(IPAddress.Parse("255.255.255.255"), portNumber));
try
{
while (localListingsClient != null && !EndingSession)
{
var data = localListingsClient.Receive(ref groupEp, ref endpoint);
if (data.Size != 1)
{
continue;
}
string[] parts = endpoint.Split('+');
string address = parts[0];
ushort port = ushort.Parse(parts[1]);
if (data[0] == SERVER_BROADCAST_CODE)
{
var ep = new BroadcastEndpoints(address, port, true);
LocalEndpoints.Add(ep);
if (localServerLocated != null)
{
localServerLocated(ep);
}
}
else if (data[0] == CLIENT_BROADCAST_CODE)
{
LocalEndpoints.Add(new BroadcastEndpoints(address, port, false));
}
}
}
catch { }
});
}
private static void AddFoundLocalNetworkEndpoint(string address, ushort port)
{
var ep = new BroadcastEndpoints(address, port, true);
LocalEndpoints.Add(ep);
if (localServerLocated != null)
{
localServerLocated(ep, null);
}
}