/**
* @param port the local port to bind to
* @param local_tas an IEnumerable object which gives the list of local
* IPs. This is consulted every time LocalTAs is accessed, so it can
* change as new interfaces are added
* @param ta_auth the TAAuthorizer for packets incoming
*/
public UdpEdgeListener(int port, IEnumerable local_config_ips, TAAuthorizer ta_auth)
{
_s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendBuffer, Int32.MaxValue);
_s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReceiveBuffer, Int32.MaxValue);
ipep = new IPEndPoint(IPAddress.Any, port);
_s.Bind(ipep);
_port = port = ((IPEndPoint)(_s.LocalEndPoint)).Port;
/**
* We get all the IPAddresses for this computer
*/
if (local_config_ips == null)
{
_tas = TransportAddressFactory.CreateForLocalHost(TransportAddress.TAType.Udp, _port);
}
else
{
_tas = TransportAddressFactory.Create(TransportAddress.TAType.Udp, _port, local_config_ips);
}
_nat_hist = null;
_nat_tas = new NatTAs(_tas, _nat_hist);
_ta_auth = ta_auth;
if (_ta_auth == null)
{
//Always authorize in this case:
_ta_auth = new ConstantAuthorizer(TAAuthorizer.Decision.Allow);
}
//We start out expecting around 30 edges with
//a load factor of 0.15 (to make edge lookup fast)
_id_ht = new Hashtable(30, 0.15f);
_remote_id_ht = new Hashtable();
_sync = new object();
_running = 0;
_isstarted = 0;
///@todo, we need a system for using the cryographic RNG
_rand = new Random();
_send_handler = this;
_listen_finished_event = new ManualResetEvent(false);
_listen_thread = new Thread(ListenThread);
_send_thread = new Thread(SendThread);
_send_thread.IsBackground = true;
_send_queue = new LFBlockingQueue <UdpMessage>();
}
public void TestPortPrediction()
{
Edge e = new FakeEdge(TransportAddressFactory.CreateInstance("brunet.udp://127.0.0.1:80"),
TransportAddressFactory.CreateInstance("brunet.udp://127.0.0.1:1080"));
NatHistory h = null;
h = h + new NewEdgePoint(DateTime.UtcNow, e);
h = h + new LocalMappingChangePoint(DateTime.UtcNow, e,
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:80"));
NatHandler nh = new PublicNatHandler();
Assert.IsTrue(nh.IsMyType(h), "PublicNatHandler");
IList tas = nh.TargetTAs(h);
Assert.IsTrue(tas.Contains(
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:80")
), "ConeNatHandler.TargetTAs");
nh = new ConeNatHandler();
Assert.IsTrue(nh.IsMyType(h), "ConeNatHandler");
tas = nh.TargetTAs(h);
//foreach(object ta in tas) { Console.Error.WriteLine(ta); }
Assert.IsTrue(tas.Contains(
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:80")
), "ConeNatHandler.TargetTAs");
/*
* Now, let's try Port prediction:
*/
int local_port = 80;
int port = local_port;
h = null;
while (port < 86)
{
e = new FakeEdge(TransportAddressFactory.CreateInstance("brunet.udp://127.0.0.1:"
+ local_port.ToString()),
TransportAddressFactory.CreateInstance("brunet.udp://127.0.0.1:1081"));
h = h + new NewEdgePoint(DateTime.UtcNow, e);
h = h + new LocalMappingChangePoint(DateTime.UtcNow, e,
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:"
+ port.ToString()
));
port = port + 1;
}
nh = new SymmetricNatHandler();
Assert.IsTrue(nh.IsMyType(h), "SymmetricNatHandler");
tas = nh.TargetTAs(h);
//foreach(object ta in tas) { Console.Error.WriteLine(ta); }
Assert.IsTrue(tas.Contains(
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:86")
), "SymmetricNatHandler.TargetTAs");
nh = new LinuxNatHandler();
Assert.IsTrue(nh.IsMyType(h), "LinuxNatHandler");
tas = nh.TargetTAs(h);
//foreach(object ta in tas) { Console.Error.WriteLine(ta); }
Assert.IsTrue(tas.Contains(
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:86")
), "LinuxNatHandler.TargetTAs");
Assert.IsTrue(tas.Contains(
TransportAddressFactory.CreateInstance("brunet.udp://128.128.128.128:80")
), "LinuxNatHandler.TargetTAs");
}
public NatHistory(NatHistory nh, NatDataPoint ndp) : base(nh, ndp)
{
}
/**
* @param local_config_tas the list of TAs to use as last resort
* @param NatHistory history information learned from talking to peers (may be null)
*/
public NatTAs(IEnumerable local_config_tas, NatHistory hist)
{
_hist = hist;
_local_config = local_config_tas;
}
/**
* @param local_config_tas the list of TAs to use as last resort
* @param NatHistory history information learned from talking to peers (may be null)
*/
public NatTAs(IEnumerable local_config_tas, NatHistory hist)
{
_nat_type = string.Empty;
_hist = hist;
_local_config = local_config_tas;
}