/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.midp.ssl;
import java.io.OutputStream;
import java.io.IOException;
import java.io.InterruptedIOException;
/**
* This class is a subclass of OutputStream and is used for
* writing data to an SSL connection.
* <P />
* @see com.sun.midp.ssl.SSLStreamConnection
* @see com.sun.midp.ssl.In
*/
class Out extends OutputStream {
/**
* The maximum SSL record size to write, currently 2048.
* RFC 2246 specifies it can be up to 2^14 + 2048, however
* breaking up streams into smaller chunks make more sense, lower
* memory usage for small devices and interspacing encryption and
* network writes may work better on congested wireless networks.
*/
private static final int MAX_RECORD_SIZE = 2048;
/** Indicates the output stream is closed. */
private boolean isClosed = false;
/** Underlying SSL record layer to which bytes are written. */
private Record rec;
/** Handle to current SSL stream connection. */
private SSLStreamConnection ssc;
/** A reusable buffer for the <code>write</code> method. */
private byte[] buf = new byte[1];
/**
* Creates a new Out object.
* <P />
* @param r SSL record layer object to which bytes are written
* @param c SSLStreamConnection object this Out object is a part of
*/
Out(Record r, SSLStreamConnection c) {
rec = r;
ssc = c;
}
/**
* Writes the specified byte to this output stream.
* <P />
* @param b byte to be written
* @exception IOException if I/O error occurs
*/
public void write(int b) throws IOException {
buf[0] = (byte) b;
write(buf, 0, 1);
}
/**
* Writes all the bytes in the specified byte array to this
* output stream. This is equivalent to write(b, 0, b.length).
* <P />
* @param b byte array containing data to be written
* @exception IOException if I/O error occurs
*/
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
/**
* Writes <CODE>len</CODE> bytes starting at offset
* <CODE>off</CODE> from byte array <CODE>b</CODE> to this
* output stream.
* <P />
* @param b byte array containing data to be written
* @param off starting offset of data to be written
* @param len number of bytes to be written
* @exception IOException if I/O error occurs
*/
public void write(byte[] b, int off, int len) throws IOException {
if (isClosed) {
throw new InterruptedIOException("Stream closed");
}
synchronized(rec) {
int bytesToWrite = MAX_RECORD_SIZE;
while (len > 0) {
if (len < bytesToWrite) {
bytesToWrite = len;
}
rec.wrRec(Record.APP, b, off, bytesToWrite);
len -= bytesToWrite;
off += bytesToWrite;
}
}
}
/**
* Close the stream connection.
*
* @exception IOException is thrown, if an I/O error occurs while
* shutting down the connection
*/
synchronized public void close() throws IOException {
if (isClosed) {
return;
}
isClosed = true;
if (ssc != null) {
ssc.outputStreamState = SSLStreamConnection.CLOSED;
rec.closeOutputStream();
ssc.cleanupIfNeeded();
}
}
// Other methods: flush() need not be over ridden
}
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