TcpChannel.cs :  » 2.6.4-mono-.net-core » System.Runtime » System » Runtime » Remoting » Channels » Tcp » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Runtime 
System.Runtime » System » Runtime » Remoting » Channels » Tcp » TcpChannel.cs
//
// System.Runtime.Remoting.Channels.Tcp.TcpChannel.cs
//
// Author: Rodrigo Moya (rodrigo@ximian.com)
//         Lluis Sanchez Gual (lluis@ideary.com)
//
// 2002 (C) Copyright, Ximian, Inc.
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.Collections;
using System.Runtime.Remoting.Messaging;
using System.Text.RegularExpressions;

namespace System.Runtime.Remoting.Channels.Tcp{
  public class TcpChannel : IChannelReceiver, IChannel, IChannelSender
  {
    private TcpClientChannel _clientChannel;
    private TcpServerChannel _serverChannel;
    private string _name = "tcp";
    private int _priority = 1;
  
    public TcpChannel ()
    {
      Init (new Hashtable(), null, null);
    }

    public TcpChannel (int port)
    {
      Hashtable ht = new Hashtable();
      ht ["port"] = port.ToString();
      Init (ht, null, null);
    }

    void Init (IDictionary properties, IClientChannelSinkProvider clientSink, IServerChannelSinkProvider serverSink)
    {
      _clientChannel = new TcpClientChannel (properties,clientSink);

      if (properties != null) {
        if(properties["port"] != null)
          _serverChannel = new TcpServerChannel(properties, serverSink);

        object val = properties ["name"];
        if (val != null)
          _name = val as string;
      
        val = properties ["priority"];
        if (val != null)
          _priority = Convert.ToInt32 (val);
      }
    }


    public TcpChannel (IDictionary properties,
           IClientChannelSinkProvider clientSinkProvider,
           IServerChannelSinkProvider serverSinkProvider)
    {
      Init (properties, clientSinkProvider, serverSinkProvider);
    }

    public IMessageSink CreateMessageSink(string url, object remoteChannelData, out string objectURI)
    {
      return _clientChannel.CreateMessageSink(url,
        remoteChannelData, out objectURI);
    }

    public string ChannelName {
      get { return _name; }
    }

    public int ChannelPriority {
      get { return _priority; }
    }

    public void StartListening (object data)
    {
      if (_serverChannel != null)
        _serverChannel.StartListening (data);
    }
    
    public void StopListening (object data)
    {
      if (_serverChannel != null)
        _serverChannel.StopListening(data);
      TcpConnectionPool.Shutdown ();
    }

    public string [] GetUrlsForUri (string objectURI)
    {
      if (_serverChannel != null)
        return _serverChannel.GetUrlsForUri (objectURI);
      return null;
    }

    public object ChannelData {
      get {
        if (_serverChannel != null)
          return _serverChannel.ChannelData;
        return null;
      }
    }

    public string Parse (string url, out string objectURI)
    {
      return TcpChannel.ParseChannelUrl (url, out objectURI);
    }

    internal static string ParseChannelUrl (string url, out string objectURI)
    {
      if (url == null)
        throw new ArgumentNullException ("url");
      
      string host, port;
      
      return ParseTcpURL (url, out host, out port, out objectURI);
    }

    internal static string ParseTcpURL (string url, out string host, out string port, out string objectURI)
    {
      // format: "tcp://host:port/path/to/object"
      objectURI = null;
      host = null;
      port = null;
      
      // url needs to be at least "tcp:"
      if (url.Length < 4 || url[3] != ':' ||
          (url[0] != 'T' && url[0] != 't') ||
          (url[1] != 'C' && url[1] != 'c') ||
          (url[2] != 'P' && url[2] != 'p'))
        return null;
      
      // "tcp:" is acceptable
      if (url.Length == 4)
        return url;
      
      // must be of the form "tcp://"
      if (url.Length <= 5 || url[4] != '/' || url[5] != '/')
        return null;
      
      // "tcp://" is acceptable
      if (url.Length == 6)
        return url;
      
      int i;
      for (i = 6; i < url.Length; i++) {
        if (url[i] == ':' || url[i] == '/')
          break;
      }
      
      host = url.Substring (6, i - 6);
      
      if (i + 1 < url.Length && url[i] == ':') {
        int start = i + 1;
        
        for (i++; i < url.Length; i++) {
          if (url[i] == '/')
            break;
        }
        
        if (i > start)
          port = url.Substring (start, i - start);
      }
      
      if (i >= url.Length || url[i] != '/')
        return url;
      
      objectURI = url.Substring (i);
      
      return url.Substring (0, i);
    }
  }
}
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