You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
455 lines
9.9 KiB
455 lines
9.9 KiB
// This code is derived from jcifs smb client library <jcifs at samba dot org>
|
|
// Ported by J. Arturo <webmaster at komodosoft dot net>
|
|
//
|
|
// This library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
using System;
|
|
using System.IO;
|
|
using SharpCifs.Smb;
|
|
using SharpCifs.Util.Sharpen;
|
|
|
|
namespace SharpCifs.Util.Transport
|
|
{
|
|
/// <summary>
|
|
/// This class simplifies communication for protocols that support
|
|
/// multiplexing requests.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This class simplifies communication for protocols that support
|
|
/// multiplexing requests. It encapsulates a stream and some protocol
|
|
/// knowledge (provided by a concrete subclass) so that connecting,
|
|
/// disconnecting, sending, and receiving can be syncronized
|
|
/// properly. Apparatus is provided to send and receive requests
|
|
/// concurrently.
|
|
/// </remarks>
|
|
public abstract class Transport : IRunnable
|
|
{
|
|
internal static int Id;
|
|
|
|
//internal static LogStream log = LogStream.GetInstance();
|
|
|
|
public LogStream Log
|
|
{
|
|
get
|
|
{
|
|
return LogStream.GetInstance();
|
|
}
|
|
}
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
public static int Readn(InputStream @in, byte[] b, int off, int len)
|
|
{
|
|
int i = 0;
|
|
int n = -5;
|
|
while (i < len)
|
|
{
|
|
n = @in.Read(b, off + i, len - i);
|
|
if (n <= 0)
|
|
{
|
|
break;
|
|
}
|
|
i += n;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
internal int State;
|
|
|
|
internal string Name = "Transport" + Id++;
|
|
|
|
internal Thread Thread;
|
|
|
|
internal TransportException Te;
|
|
|
|
protected internal Hashtable ResponseMap = new Hashtable();
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract void MakeKey(ServerMessageBlock request);
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract ServerMessageBlock PeekKey();
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract void DoSend(ServerMessageBlock request);
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract void DoRecv(Response response);
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract void DoSkip();
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
public virtual void Sendrecv(ServerMessageBlock request, Response response, long timeout)
|
|
{
|
|
lock (this)
|
|
{
|
|
MakeKey(request);
|
|
response.IsReceived = false;
|
|
try
|
|
{
|
|
ResponseMap.Put(request, response);
|
|
DoSend(request);
|
|
response.Expiration = Runtime.CurrentTimeMillis() + timeout;
|
|
while (!response.IsReceived)
|
|
{
|
|
Runtime.Wait(this, timeout);
|
|
timeout = response.Expiration - Runtime.CurrentTimeMillis();
|
|
if (timeout <= 0)
|
|
{
|
|
throw new TransportException(Name + " timedout waiting for response to " + request
|
|
);
|
|
}
|
|
}
|
|
}
|
|
catch (IOException ioe)
|
|
{
|
|
if (Log.Level > 2)
|
|
{
|
|
Runtime.PrintStackTrace(ioe, Log);
|
|
}
|
|
try
|
|
{
|
|
Disconnect(true);
|
|
}
|
|
catch (IOException ioe2)
|
|
{
|
|
Runtime.PrintStackTrace(ioe2, Log);
|
|
}
|
|
throw;
|
|
}
|
|
catch (Exception ie)
|
|
{
|
|
throw new TransportException(ie);
|
|
}
|
|
finally
|
|
{
|
|
//Sharpen.Collections.Remove(response_map, request);
|
|
ResponseMap.Remove(request);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void Loop()
|
|
{
|
|
while (Thread == Thread.CurrentThread())
|
|
{
|
|
try
|
|
{
|
|
ServerMessageBlock key = PeekKey();
|
|
if (key == null)
|
|
{
|
|
throw new IOException("end of stream");
|
|
}
|
|
|
|
|
|
lock (this)
|
|
{
|
|
Response response = (Response)ResponseMap.Get(key);
|
|
if (response == null)
|
|
{
|
|
if (Log.Level >= 4)
|
|
{
|
|
Log.WriteLine("Invalid key, skipping message");
|
|
}
|
|
DoSkip();
|
|
}
|
|
else
|
|
{
|
|
DoRecv(response);
|
|
response.IsReceived = true;
|
|
Runtime.NotifyAll(this);
|
|
}
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
string msg = ex.Message;
|
|
bool timeout = msg != null && msg.Equals("Read timed out");
|
|
bool hard = timeout == false;
|
|
if (!timeout && Log.Level >= 3)
|
|
{
|
|
Runtime.PrintStackTrace(ex, Log);
|
|
}
|
|
try
|
|
{
|
|
Disconnect(hard);
|
|
}
|
|
catch (IOException ioe)
|
|
{
|
|
Runtime.PrintStackTrace(ioe, Log);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <exception cref="System.Exception"></exception>
|
|
protected internal abstract void DoConnect();
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
protected internal abstract void DoDisconnect(bool hard);
|
|
|
|
/// <exception cref="SharpCifs.Util.Transport.TransportException"></exception>
|
|
public virtual void Connect(long timeout)
|
|
{
|
|
lock (this)
|
|
{
|
|
try
|
|
{
|
|
switch (State)
|
|
{
|
|
case 0:
|
|
{
|
|
break;
|
|
}
|
|
|
|
case 3:
|
|
{
|
|
return;
|
|
}
|
|
|
|
case 4:
|
|
{
|
|
// already connected
|
|
State = 0;
|
|
throw new TransportException("Connection in error", Te);
|
|
}
|
|
|
|
default:
|
|
{
|
|
//TransportException te = new TransportException("Invalid state: " + state);
|
|
State = 0;
|
|
throw new TransportException("Invalid state: " + State);
|
|
}
|
|
}
|
|
State = 1;
|
|
Te = null;
|
|
Thread = new Thread(this);
|
|
Thread.SetDaemon(true);
|
|
lock (Thread)
|
|
{
|
|
Thread.Start();
|
|
Runtime.Wait(Thread, timeout);
|
|
switch (State)
|
|
{
|
|
case 1:
|
|
{
|
|
State = 0;
|
|
Thread = null;
|
|
throw new TransportException("Connection timeout");
|
|
}
|
|
|
|
case 2:
|
|
{
|
|
if (Te != null)
|
|
{
|
|
State = 4;
|
|
Thread = null;
|
|
throw Te;
|
|
}
|
|
State = 3;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch (Exception ie)
|
|
{
|
|
State = 0;
|
|
Thread = null;
|
|
throw new TransportException(ie);
|
|
}
|
|
finally
|
|
{
|
|
if (State != 0 && State != 3 && State != 4)
|
|
{
|
|
if (Log.Level >= 1)
|
|
{
|
|
Log.WriteLine("Invalid state: " + State);
|
|
}
|
|
State = 0;
|
|
Thread = null;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <exception cref="System.IO.IOException"></exception>
|
|
public virtual void Disconnect(bool hard)
|
|
{
|
|
|
|
if (hard)
|
|
{
|
|
IOException ioe = null;
|
|
switch (State)
|
|
{
|
|
case 0:
|
|
{
|
|
return;
|
|
}
|
|
|
|
case 2:
|
|
{
|
|
hard = true;
|
|
goto case 3;
|
|
}
|
|
|
|
case 3:
|
|
{
|
|
if (ResponseMap.Count != 0 && !hard)
|
|
{
|
|
break;
|
|
}
|
|
try
|
|
{
|
|
DoDisconnect(hard);
|
|
}
|
|
catch (IOException ioe0)
|
|
{
|
|
ioe = ioe0;
|
|
}
|
|
goto case 4;
|
|
}
|
|
|
|
case 4:
|
|
{
|
|
Thread = null;
|
|
State = 0;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
if (Log.Level >= 1)
|
|
{
|
|
Log.WriteLine("Invalid state: " + State);
|
|
}
|
|
Thread = null;
|
|
State = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (ioe != null)
|
|
{
|
|
throw ioe;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
lock (this)
|
|
{
|
|
IOException ioe = null;
|
|
switch (State)
|
|
{
|
|
case 0:
|
|
{
|
|
return;
|
|
}
|
|
|
|
case 2:
|
|
{
|
|
hard = true;
|
|
goto case 3;
|
|
}
|
|
|
|
case 3:
|
|
{
|
|
if (ResponseMap.Count != 0 && !hard)
|
|
{
|
|
break;
|
|
}
|
|
try
|
|
{
|
|
DoDisconnect(hard);
|
|
}
|
|
catch (IOException ioe0)
|
|
{
|
|
ioe = ioe0;
|
|
}
|
|
goto case 4;
|
|
}
|
|
|
|
case 4:
|
|
{
|
|
Thread = null;
|
|
State = 0;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
if (Log.Level >= 1)
|
|
{
|
|
Log.WriteLine("Invalid state: " + State);
|
|
}
|
|
Thread = null;
|
|
State = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (ioe != null)
|
|
{
|
|
throw ioe;
|
|
}
|
|
}
|
|
}
|
|
|
|
public virtual void Run()
|
|
{
|
|
Thread runThread = Thread.CurrentThread();
|
|
Exception ex0 = null;
|
|
try
|
|
{
|
|
DoConnect();
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
ex0 = ex;
|
|
// Defer to below where we're locked
|
|
return;
|
|
}
|
|
finally
|
|
{
|
|
lock (runThread)
|
|
{
|
|
if (runThread != Thread)
|
|
{
|
|
if (ex0 != null)
|
|
{
|
|
if (Log.Level >= 2)
|
|
{
|
|
Runtime.PrintStackTrace(ex0, Log);
|
|
}
|
|
}
|
|
//return;
|
|
}
|
|
if (ex0 != null)
|
|
{
|
|
Te = new TransportException(ex0);
|
|
}
|
|
State = 2;
|
|
// run connected
|
|
Runtime.Notify(runThread);
|
|
}
|
|
}
|
|
Loop();
|
|
}
|
|
|
|
public override string ToString()
|
|
{
|
|
return Name;
|
|
}
|
|
}
|
|
}
|