IpcChannel.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Remoting / Channels / IPC / IpcChannel.cs / 1305376 / IpcChannel.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
//============================================================================
//  File:       IpcChannel.cs 
//  Author:   [....]@Microsoft.Com 
//  Summary:    Implements a combined ipc channel
// 
//=========================================================================

using System;
using System.Collections; 
using System.Runtime.Remoting;
using System.Runtime.Remoting.Messaging; 
using System.Globalization; 
using System.Security.AccessControl;
using System.Security.Permissions; 


namespace System.Runtime.Remoting.Channels.Ipc
{ 

    public class IpcChannel : IChannelReceiver, IChannelSender, ISecurableChannel 
    { 
        private IpcClientChannel  _clientChannel = null; // client channel
        private IpcServerChannel  _serverChannel = null; // server channel 

        private int    _channelPriority = 20;  // channel priority
        private String _channelName = "ipc"; // channel name
 

        public IpcChannel() 
        { 
            _clientChannel = new IpcClientChannel();
            // server channel will not be activated. 
        } // IpcChannel

        public IpcChannel(String portName) : this()
        { 
            _serverChannel = new IpcServerChannel(portName);
        } // IpcChannel 
 
        public IpcChannel(IDictionary properties,
                          IClientChannelSinkProvider clientSinkProvider, 
                          IServerChannelSinkProvider serverSinkProvider)
            : this(properties, clientSinkProvider, serverSinkProvider, null)
        {
        } 

        public IpcChannel(IDictionary properties, 
                          IClientChannelSinkProvider clientSinkProvider, 
                          IServerChannelSinkProvider serverSinkProvider,
                          CommonSecurityDescriptor securityDescriptor) 
        {
            Hashtable clientData = new Hashtable();
            Hashtable serverData = new Hashtable();
 
            bool portFound = false;
 
            // divide properties up for respective channels 
            if (properties != null)
            { 
                foreach (DictionaryEntry entry in properties)
                {
                    switch ((String)entry.Key)
                    { 
                    // general channel properties
                    case "name": _channelName = (String)entry.Value; break; 
                    case "priority": _channelPriority = Convert.ToInt32((String)entry.Value, CultureInfo.InvariantCulture); break; 
                    case "portName":
                    { 
                        serverData["portName"] = entry.Value;
                        portFound = true;
                        break;
                    } 

                    default: 
                            clientData[entry.Key] = entry.Value; 
                            serverData[entry.Key] = entry.Value;
                            break; 
                    }
                }
            }
 
            _clientChannel = new IpcClientChannel(clientData, clientSinkProvider);
 
            if (portFound) 
                _serverChannel = new IpcServerChannel(serverData, serverSinkProvider, securityDescriptor);
        } // IpcChannel 


        //
        // ISecurableChannel implementation 
        //
        public bool IsSecured 
        { 
            [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
            get { 
                if (_clientChannel != null)
                    return _clientChannel.IsSecured;
                if (_serverChannel != null)
                    return _serverChannel.IsSecured; 
                return false;
            } 
            [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)] 
            set {
                if (((IList)ChannelServices.RegisteredChannels).Contains(this)) 
                    throw new InvalidOperationException(CoreChannel.GetResourceString("Remoting_InvalidOperation_IsSecuredCannotBeChangedOnRegisteredChannels"));
                if (_clientChannel != null)
                    _clientChannel.IsSecured = value;
                if (_serverChannel != null) 
                    _serverChannel.IsSecured = value;
            } 
        } 

        // 
        // IChannel implementation
        //

        public int ChannelPriority 
        {
            [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)] 
            get { return _channelPriority; } 
        } // ChannelPriority
 
        public String ChannelName
        {
            [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
            get { return _channelName; } 
        } // ChannelName
 
        // returns channelURI and places object uri into out parameter 
        [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
        public String Parse(String url, out String objectURI) 
        {
            return IpcChannelHelper.ParseURL(url, out objectURI);
        } // Parse
 
        //
        // end of IChannel implementation 
        // 

 
        //
        // IChannelSender implementation
        //
 
        [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
        public IMessageSink CreateMessageSink(String url, Object remoteChannelData, 
                                                      out String objectURI) 
        {
            return _clientChannel.CreateMessageSink(url, remoteChannelData, out objectURI); 
        } // CreateMessageSink

        //
        // end of IChannelSender implementation 
        //
 
 
        //
        // IChannelReceiver implementation 
        //

        public Object ChannelData
        { 
            [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
            get 
            { 
                if (_serverChannel != null)
                    return _serverChannel.ChannelData; 
                else
                    return null;
            }
        } // ChannelData 

 
        [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)] 
        public String[] GetUrlsForUri(String objectURI)
        { 
            if (_serverChannel != null)
                return _serverChannel.GetUrlsForUri(objectURI);
            else
                return null; 
        } // GetUrlsforURI
 
 
        [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)]
        public void StartListening(Object data) 
        {
            if (_serverChannel != null)
                _serverChannel.StartListening(data);
        } // StartListening 

 
        [SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.Infrastructure, Infrastructure=true)] 
        public void StopListening(Object data)
        { 
            if (_serverChannel != null)
                _serverChannel.StopListening(data);
        } // StopListening
 
        //
        // IChannelReceiver implementation 
        // 

 
    } // class IpcChannel


} // namespace System.Runtime.Remoting.Channels.Ipc 

 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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