public void Discover()
{
lock (lockObject)
{
DiscoveryMessage response = new DiscoveryMessage {
Command = DiscoveryCommand.HelloRequest
};
foreach (var seed in _fixSeedIPs)
{
var ip = new IPEndPoint(IPAddress.Parse(seed), 15000);
response.Command = DiscoveryCommand.HelloRequest;
udp.Send(response.ToByteArray(), response.Length, ip);
}
foreach (var point in endPoints.ToArray())
{
response.Command = DiscoveryCommand.HelloRequest;
udp.Send(response.ToByteArray(), response.Length, point);
}
endPoints.Clear();
}
}
private void Receive(IAsyncResult ar)
{
IPEndPoint ip = new IPEndPoint(IPAddress.Any, 15000);
byte[] bytes = udp.EndReceive(ar, ref ip);
DiscoveryMessage message = new DiscoveryMessage(bytes);
DiscoveryMessage response = new DiscoveryMessage();
if (message.Command == DiscoveryCommand.HelloRequest)
{
// byte[] send = Encoding.ASCII.GetBytes("server");
response.Command = DiscoveryCommand.NodeListRequest;
response.Payload = null;
udp.Send(response.ToByteArray(), response.Length, ip);
}
if (message.Command == DiscoveryCommand.HelloResponse)
{
response.Command = DiscoveryCommand.NodeListRequest;
response.Payload = null;
udp.Send(response.ToByteArray(), response.Length, ip);
}
if (message.Command == DiscoveryCommand.NodeListRequest)
{
using (MemoryStream m = new MemoryStream())
{
//SslStream stream = new SslStream(m);
StreamWriter sw = new StreamWriter(m);
foreach (var p in GetEndPoints().ToArray())
{
sw.Write(p.Address.ToString());
sw.Write(':');
sw.Write(p.Port);
sw.Write(';');
}
sw.Flush();
response.Command = DiscoveryCommand.NodeListResponse;
response.Payload = m.ToArray();
udp.Send(response.ToByteArray(), response.Length, ip);
sw.Dispose();
}
}
else if (message.Command == DiscoveryCommand.NodeListResponse)
{
lock (lockObject)
{
string[] ips = message.ToString().Split(';');
foreach (string p in ips)
{
if (p == "")
{
continue;
}
string[] ps = p.Split(':');
if (endPoints.Count(p1 => p1.Address.ToString() == ps[0] && p1.Port == Convert.ToInt32(ps[1])) == 0)
{
endPoints.Add(new IPEndPoint(IPAddress.Parse(ps[0]), Convert.ToInt32(ps[1])));
}
}
}
}
lock (lockObject)
{
if (endPoints.Count(p => p.Address.ToString() == ip.Address.ToString() && p.Port == ip.Port) == 0)
{
endPoints.Add(ip);
}
}
StartListening();
}