public static void NatConicityTest()
{
var info = new AddressInfoMessage[2];
var clients = new Client[2];
clients[0] = new Client(server_endpoints[0]);
clients[0].ConnectToServer();
clients[1] = new Client(server_endpoints[1]);
clients[1].ReuseEndPoint(clients[0].client.LocalEndPoint);
clients[1].ConnectToServer();
info[0] = clients[0].GetMyAddressInfo();
info[1] = clients[1].GetMyAddressInfo();
System.Console.WriteLine($"AddressInfo 0: {info[0].ToPrettyString()}");
System.Console.WriteLine($"AddressInfo 1: {info[1].ToPrettyString()}");
bool isConic = info[0].PublicEndpoint.Equals(info[1].PublicEndpoint);
System.Console.WriteLine($"Your nat is {(isConic ? "CONE" : "SIMMETRIC")}");
System.Console.WriteLine("If public ports and addresses are the same, then your NAT is cone.");
System.Console.WriteLine("Clients will connect IF ONLY your NAT is CONE.");
clients[0].client.Close();
clients[1].client.Close();
}
public Socket EstablishOutboundTcp(AddressInfoMessage info)
{
Socket private_client = CreateSocket();
Socket public_client = CreateSocket();
Socket listener = CreateSocket();
private_client.Bind(client.LocalEndPoint);
public_client.Bind(client.LocalEndPoint);
listener.Bind(client.LocalEndPoint);
listener.Listen(1);
Func <Task <Socket> >[] funcs = new Func <Task <Socket> >[]
{
() => Task.Run(() =>
{
System.Console.WriteLine($"Sending connection request to {info.PrivateEndpoint.Convert()} from {private_client.LocalEndPoint}");
private_client.Connect(info.PrivateEndpoint.Convert());
return(private_client);
}),
() => Task.Run(() =>
{
System.Console.WriteLine($"Sending connection request to {info.PublicEndpoint.Convert()} from {public_client.LocalEndPoint}");
public_client.Connect(info.PublicEndpoint.Convert());
return(public_client);
}),
() => Task.Run(() => listener.Accept())
};
Task <Socket>[] tasks = new Task <Socket>[]
{
funcs[0](),
funcs[1](),
funcs[2]()
};
int num_errors = 0;
const int max_errors = 10;
while (true)
{
int index = Task.WaitAny(tasks);
if (tasks[index].IsFaulted)
{
if (++num_errors >= max_errors)
{
return(null);
}
else
{
System.Console.WriteLine($"Task number {index} threw an error. Current number of errors: {num_errors}");
tasks[index] = funcs[index]();
}
}
else
{
System.Console.WriteLine($"Task number {index} succeeded.");
return(tasks[index].Result);
}
}
}
public static string ToPrettyString(this AddressInfoMessage info)
{
return($"[{info.Id}] {info.PublicEndpoint.GetAddress()}:{info.PublicEndpoint.Port} | {info.PrivateEndpoint.GetAddress()}:{info.PrivateEndpoint.Port}");
}