Brunet.Services.Coordinate.NCTunnelOverlap.EvaluateOverlap C# (CSharp) Method

    public override List<Connection> EvaluateOverlap(ConnectionList cons, IDictionary msg)
    {
      List<Connection> overlap = new List<Connection>();

      foreach(DictionaryEntry de in msg) {
        MemBlock key = de.Key as MemBlock;
        if(key == null) {
          key = MemBlock.Reference((byte[]) de.Key);
        }
        Address addr = new AHAddress(key);

        int index = cons.IndexOf(addr);
        if(index < 0) {
          continue;
        }

        Connection con = cons[index];

        // Since there are no guarantees about routing over two tunnels, we do
        // not consider cases where we are connected to the overlapping tunnels
        // peers via tunnels
        if(con.Edge.TAType.Equals(TransportAddress.TAType.Tunnel)) {
          Hashtable values = de.Value as Hashtable;
          TransportAddress.TAType tatype =
            TransportAddressFactory.StringToType(values["ta"] as string);
          if(tatype.Equals(TransportAddress.TAType.Tunnel)) {
            continue;
          }
        }
        overlap.Add(con);
      }

      return GetClosest(overlap);
    }

    public void Test()
    {
      Address addr_x = new AHAddress(new RNGCryptoServiceProvider());
      byte[] addrbuff = Address.ConvertToAddressBuffer(addr_x.ToBigInteger() + (Address.Full / 2));
      Address.SetClass(addrbuff, AHAddress._class);
      Address addr_y = new AHAddress(addrbuff);

      List<Connection> connections = new List<Connection>();
      ConnectionTable ct_x = new ConnectionTable();
      ConnectionTable ct_y = new ConnectionTable();
      ConnectionTable ct_empty = new ConnectionTable();
      NCService ncservice = new NCService();

      Connection fast_con = null;
      for(int i = 1; i <= 11; i++) {
        addrbuff = Address.ConvertToAddressBuffer(addr_x.ToBigInteger() + (i * Address.Full / 16));
        Address.SetClass(addrbuff, AHAddress._class);
        Address addr = new AHAddress(addrbuff);
        Connection con = null;

        TransportAddress ta = TransportAddressFactory.CreateInstance("brunet.tcp://158.7.0.1:5000");
        Edge fe = new FakeEdge(ta, ta, TransportAddress.TAType.Tcp);
        if(i <= 10) {
          con = new Connection(fe, addr, "structured", null, null);
          ct_x.Add(con);
          if(i % 2 == 0) {
            ncservice.ProcessSample(DateTime.UtcNow, String.Empty, addr,
                new Point(new double[] {0, 0}, 0), 0, i*10);
          }
        } else {
          fast_con = new Connection(fe, addr, "structured", null, null);
          ncservice.ProcessSample(DateTime.UtcNow, String.Empty, addr,
              new Point(new double[] {0, 0}, 0), 0, 5);
        }

        if(i == 10) {
          ct_y.Add(con);
        }
        connections.Add(con);
      }

      ITunnelOverlap sto = new SimpleTunnelOverlap();
      ITunnelOverlap nto = new NCTunnelOverlap(ncservice);

      ConnectionType con_type = ConnectionType.Structured;
      List<Connection> pre_cons = new List<Connection>();
      pre_cons.Add(connections[9]);
      IDictionary id = nto.GetSyncMessage(pre_cons, addr_x, ct_x.GetConnections(con_type));

      // We do have some pre-existing overlap
      Assert.AreEqual(nto.EvaluateOverlap(ct_y.GetConnections(con_type), id)[0], connections[9], "NC: Have an overlap!");
      Assert.AreEqual(sto.EvaluateOverlap(ct_y.GetConnections(con_type), id)[0], connections[9], "Simple: Have an overlap!");

      // We have no overlap with an empty connection table
      Assert.AreEqual(nto.EvaluateOverlap(ct_empty.GetConnections(con_type), id).Count, 0, "No overlap!");
      Assert.AreEqual(sto.EvaluateOverlap(ct_empty.GetConnections(con_type), id).Count, 0, "No overlap!");

      // latency[0] == -1
      Assert.AreEqual(connections[1].Address.Equals(nto.EvaluatePotentialOverlap(id)), true,
          "NC: EvaluatePotentialOverlap returns expected!");
      Assert.AreEqual(ct_x.Contains(con_type, sto.EvaluatePotentialOverlap(id)), true,
          "Simple: EvaluatePotentialOverlap returns valid!");

      ct_y.Add(fast_con);
      ct_x.Add(fast_con);
      id = nto.GetSyncMessage(pre_cons, addr_x, ct_x.GetConnections(con_type));
      Assert.AreEqual(fast_con.Address.Equals(nto.EvaluatePotentialOverlap(id)), true,
          "NC: EvaluatePotentialOverlap returns expected!");
      Assert.AreEqual(nto.EvaluateOverlap(ct_y.GetConnections(con_type), id)[0], fast_con, "NC: Have better overlap!");
    }