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// PlainSocketImpl.java - Implementation of SocketImpl.
/* Copyright (C) 1999 , 2002 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.net;
import java.io.*;
/**
* The standard GCJ socket implementation.
* Written using on-line Java Platform 1.2 API Specification, as well
* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
* Status: Believed complete and correct.
*
* @author Per Bothner <bothner@cygnus.com>
* @author Nic Ferrier <nferrier@tapsellferrier.co.uk>
*/
class PlainSocketImpl extends SocketImpl
{
// These fields are mirrored for use in native code to avoid cpp conflicts
// when the #defines in system header files are the same as the public fields.
static final int _Jv_TCP_NODELAY_ = SocketOptions.TCP_NODELAY,
_Jv_SO_BINDADDR_ = SocketOptions.SO_BINDADDR,
_Jv_SO_REUSEADDR_ = SocketOptions.SO_REUSEADDR,
_Jv_SO_BROADCAST_ = SocketOptions.SO_BROADCAST,
_Jv_SO_OOBINLINE_ = SocketOptions.SO_OOBINLINE,
_Jv_IP_MULTICAST_IF_ = SocketOptions.IP_MULTICAST_IF,
_Jv_IP_MULTICAST_IF2_ = SocketOptions.IP_MULTICAST_IF2,
_Jv_IP_MULTICAST_LOOP_ = SocketOptions.IP_MULTICAST_LOOP,
_Jv_IP_TOS_ = SocketOptions.IP_TOS,
_Jv_SO_LINGER_ = SocketOptions.SO_LINGER,
_Jv_SO_TIMEOUT_ = SocketOptions.SO_TIMEOUT,
_Jv_SO_SNDBUF_ = SocketOptions.SO_SNDBUF,
_Jv_SO_RCVBUF_ = SocketOptions.SO_RCVBUF,
_Jv_SO_KEEPALIVE_ = SocketOptions.SO_KEEPALIVE;
/**
* The OS file handle representing the socket.
* This is used for reads and writes to/from the socket and
* to close it.
*
* When the socket is closed this is reset to -1.
*/
int fnum = -1;
// This value is set/read by setOption/getOption.
int timeout = 0;
// localAddress cache
InetAddress localAddress;
public native void setOption(int optID, Object value) throws SocketException;
public native Object getOption(int optID) throws SocketException;
public native void shutdownInput () throws IOException;
public native void shutdownOutput () throws IOException;
protected native void create (boolean stream) throws IOException;
protected void connect (String host, int port) throws IOException
{
connect (new InetSocketAddress (InetAddress.getByName(host), port), 0);
}
protected void connect (InetAddress host, int port) throws IOException
{
connect (new InetSocketAddress (host, port), 0);
}
protected native void connect (SocketAddress addr, int timeout)
throws IOException;
protected native void bind (InetAddress host, int port) throws IOException;
protected native void listen (int backlog) throws IOException;
private native void accept (PlainSocketImpl s) throws IOException;
protected void accept (SocketImpl s) throws IOException
{
accept((PlainSocketImpl) s);
}
protected native int available() throws IOException;
protected native void close () throws IOException;
protected native void sendUrgentData(int data)
throws IOException;
// Stream handling.
/** A cached copy of the in stream for reading from the socket. */
private InputStream in;
/** A cached copy of the out stream for writing to the socket. */
private OutputStream out;
// The native read methods.
private native int read() throws IOException;
private native int read(byte[] buffer, int offset, int count)
throws IOException;
// The native write methods.
private native void write(int c) throws IOException;
private native void write(byte[] buffer, int offset, int count)
throws IOException;
protected void finalize() throws Throwable
{
synchronized (this)
{
if (fnum != -1)
try
{
close();
}
catch (IOException ex)
{
// ignore
}
}
super.finalize();
}
/** @return the input stream attached to the socket.
*/
protected InputStream getInputStream() throws IOException
{
if (in == null)
in = new SocketInputStream();
return in;
}
/** @return the output stream attached to the socket.
*/
protected OutputStream getOutputStream() throws IOException
{
if (out == null)
out = new SocketOutputStream();
return out;
}
/**
* A stream which reads from the socket implementation.
*
* @author Nic Ferrier <nferrier@tapsellferrier.co.uk>
*/
class SocketInputStream
extends InputStream
{
SocketInputStream()
{
}
public final void close() throws IOException
{
PlainSocketImpl.this.close();
}
public final int available() throws IOException
{
return PlainSocketImpl.this.available();
}
public final int read() throws IOException
{
return PlainSocketImpl.this.read();
}
public final int read(byte[] buffer, int offset, int length)
throws IOException
{
return PlainSocketImpl.this.read(buffer, offset, length);
}
public final int read(byte[] buffer)
throws IOException
{
return PlainSocketImpl.this.read(buffer, 0, buffer.length);
}
}
/** A stream which writes to the socket implementation.
*
* @author Nic Ferrier <nferrier@tapsellferrier.co.uk>
*/
class SocketOutputStream
extends OutputStream
{
public final void close() throws IOException
{
PlainSocketImpl.this.close();
}
public final void write(int c) throws IOException
{
PlainSocketImpl.this.write(c);
}
public final void write(byte[] buffer, int offset, int length)
throws IOException
{
PlainSocketImpl.this.write(buffer, offset, length);
}
public final void write(byte[] buffer)
throws IOException
{
PlainSocketImpl.this.write(buffer, 0, buffer.length);
}
}
}
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