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//
// TcpReplyChannel.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2009 Novell, Inc. http://www.novell.com
//
// 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;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.ServiceModel;
using System.Text;
using System.Threading;
namespace System.ServiceModel.Channels.NetTcp
{
internal class TcpReplyChannel : InternalReplyChannelBase
{
TcpClient client;
TcpChannelInfo info;
TcpBinaryFrameManager frame;
public TcpReplyChannel (ChannelListenerBase listener, TcpChannelInfo info, TcpClient client)
: base (listener)
{
this.client = client;
this.info = info;
}
public MessageEncoder Encoder {
get { return info.MessageEncoder; }
}
public override RequestContext ReceiveRequest (TimeSpan timeout)
{
if (timeout <= TimeSpan.Zero)
throw new ArgumentException (String.Format ("Timeout value must be positive value. It was {0}", timeout));
// FIXME: use timeout
if (client == null)
client = ((TcpChannelListener<IReplyChannel>) Manager).AcceptTcpClient (timeout);
NetworkStream ns = client.GetStream ();
frame = new TcpBinaryFrameManager (TcpBinaryFrameManager.SingletonUnsizedMode, ns, true) { Encoder = this.Encoder };
// FIXME: use timeout
if (!frame.ProcessPreambleRecipient ())
return null;
frame.ProcessPreambleAckRecipient ();
var msg = frame.ReadUnsizedMessage (timeout);
Logger.LogMessage (MessageLogSourceKind.TransportReceive, ref msg, info.BindingElement.MaxReceivedMessageSize);
// LAMESPEC: it contradicts the protocol explanation at section 3.1.1.1.1 in [MC-NMF].
// Moving ReadEndRecord() after context's WriteUnsizedMessage() causes TCP connection blocking.
frame.ReadEndRecord ();
return new TcpRequestContext (this, msg);
}
class TcpRequestContext : InternalRequestContext
{
public TcpRequestContext (TcpReplyChannel owner, Message request)
: base (owner.Manager)
{
this.owner = owner;
this.request = request;
}
TcpReplyChannel owner;
Message request;
public override Message RequestMessage {
get { return request; }
}
public override void Abort ()
{
Close (TimeSpan.Zero);
}
public override void Close (TimeSpan timeout)
{
}
public override void Reply (Message message, TimeSpan timeout)
{
Logger.LogMessage (MessageLogSourceKind.TransportSend, ref message, owner.info.BindingElement.MaxReceivedMessageSize);
owner.frame.WriteUnsizedMessage (message, timeout);
// FIXME: consider timeout here too.
owner.frame.WriteEndRecord ();
}
}
public override bool TryReceiveRequest (TimeSpan timeout, out RequestContext context)
{
try {
context = ReceiveRequest (timeout);
return context != null;
} catch (Exception ex) {
// FIXME: log it?
// Console.WriteLine (ex);
context = null;
return false;
}
}
public override bool WaitForRequest (TimeSpan timeout)
{
throw new NotImplementedException ();
}
bool close_started;
object close_lock = new object ();
protected override void OnClose (TimeSpan timeout)
{
lock (close_lock) {
if (close_started)
return;
close_started = true;
}
client.Close ();
client = null;
base.OnClose (timeout);
}
protected override void OnOpen (TimeSpan timeout)
{
}
}
}
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