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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2005 Martin Koegler
* Copyright (C) 2010 TigerVNC Team
* Copyright (C) 2011 Brian P. Hinz
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package com.tigervnc.rdr;
import java.nio.ByteBuffer;
import java.nio.channels.*;
import javax.net.ssl.*;
import com.tigervnc.network.*;
public class TLSInStream extends InStream {
static final int defaultBufSize = 16384;
public TLSInStream(InStream _in, SSLEngineManager _manager) {
in = (FdInStream)_in;
manager = _manager;
offset = 0;
SSLSession session = manager.getSession();
bufSize = session.getApplicationBufferSize();
b = new byte[bufSize];
ptr = end = start = 0;
}
public final int pos() {
return offset + ptr - start;
}
public final void startTiming() {
in.startTiming();
}
public final void stopTiming() {
in.stopTiming();
}
public final long kbitsPerSecond() {
return in.kbitsPerSecond();
}
public final long timeWaited() {
return in.timeWaited();
}
protected final int overrun(int itemSize, int nItems, boolean wait) {
if (itemSize > bufSize)
throw new Exception("TLSInStream overrun: max itemSize exceeded");
if (end - ptr != 0)
System.arraycopy(b, ptr, b, 0, end - ptr);
offset += ptr - start;
end -= ptr - start;
ptr = start;
while (end < start + itemSize) {
int n = readTLS(b, end, start + bufSize - end, wait);
if (!wait && n == 0)
return 0;
end += n;
}
if (itemSize * nItems > end - ptr)
nItems = (end - ptr) / itemSize;
return nItems;
}
protected int readTLS(byte[] buf, int bufPtr, int len, boolean wait)
{
int n = -1;
//n = in.check(1, 1, wait);
//if (n == 0)
// return 0;
try {
n = manager.read(buf, bufPtr, len);
} catch (java.io.IOException e) {
e.printStackTrace();
}
if (n < 0) throw new TLSException("readTLS", n);
return n;
}
private SSLEngineManager manager;
private int offset;
private int start;
private int bufSize;
private FdInStream in;
}
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