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source: trunk/sources/HeuristicLab.Communication.Operators/TcpNetworkInitiator.cs @ 925

Last change on this file since 925 was 705, checked in by abeham, 16 years ago

[TICKET #297] fixed some bugs in the TCP connection

File size: 2.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Net;
25using System.Net.Sockets;
26using System.Text;
27using HeuristicLab.Core;
28using HeuristicLab.Data;
29using HeuristicLab.Communication.Data;
30
31namespace HeuristicLab.Communication.Operators {
32  public class TcpNetworkInitiator : OperatorBase {
33
34    public override string Description {
35      get { return @"Initiates a TCP socket, it opens one socket for sending and one socket for listening as specified in the configuration"; }
36    }
37
38    public TcpNetworkInitiator() {
39      AddVariableInfo(new VariableInfo("DriverConfiguration", "A configuration object", typeof(TcpNetworkDriverConfiguration), VariableKind.In));
40      AddVariableInfo(new VariableInfo("NetworkConnection", "A connection object", typeof(SocketData), VariableKind.New));
41    }
42
43    public override IOperation Apply(IScope scope) {
44      TcpNetworkDriverConfiguration config = GetVariableValue<TcpNetworkDriverConfiguration>("DriverConfiguration", scope, true);
45      SocketData socket = new SocketData();
46      socket.Initialize(config);
47      while (!socket.Connect()) ;
48      try {
49        socket.Write("REQUEST_CONNECT");
50        if (!socket.Read().Equals("REQUEST_CONNECT")) throw new InvalidOperationException("ERROR in TcpNetworkInitiator: Remote host answered with unknown response!");
51        socket.Write("ACK");
52        if (!socket.Read().Equals("ACK")) throw new InvalidOperationException("ERROR in TcpNetworkInitiator: Remote host answered with unknown response!");
53      } catch (Exception) {
54        try {
55          socket.Close();
56        } catch (Exception) { }
57        return new AtomicOperation(this, scope);
58      }
59
60      IVariableInfo info = GetVariableInfo("NetworkConnection");
61      if (info.Local)
62        AddVariable(new Variable(info.ActualName, socket));
63      else
64        scope.AddVariable(new Variable(scope.TranslateName(info.FormalName), socket));
65
66      return null;
67    }
68  }
69}
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