147 lines
4.4 KiB
Java
147 lines
4.4 KiB
Java
/* SocketOptions.java -- Implements options for sockets (duh!)
|
|
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath 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, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package java.net;
|
|
|
|
/**
|
|
* Written using on-line Java Platform 1.2 API Specification.
|
|
* Status: Believed complete and correct.
|
|
*/
|
|
|
|
/**
|
|
* This interface is used by <code>SocketImpl</code> and
|
|
* <code>DatagramSocketImpl</code> to implement options
|
|
* on sockets.
|
|
*
|
|
* @since 1.2
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
* @author Warren Levy <warrenl@cygnus.com>
|
|
*/
|
|
public interface SocketOptions
|
|
{
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Static Variables
|
|
*/
|
|
|
|
/**
|
|
* Option id for the SO_LINGER value
|
|
*/
|
|
static final int SO_LINGER = 0x80; // 128
|
|
|
|
/**
|
|
* Option id for the SO_TIMEOUT value
|
|
*/
|
|
static final int SO_TIMEOUT = 0x1006; // 4102
|
|
|
|
/**
|
|
* Retrieve the local address to which the socket is bound.
|
|
*/
|
|
static final int SO_BINDADDR = 0x0F; // 15
|
|
|
|
/**
|
|
* Option id for the send buffer size
|
|
* @since 1.2
|
|
*/
|
|
static final int SO_SNDBUF = 0x1001; // 4097
|
|
|
|
/**
|
|
* Option id for the receive buffer size
|
|
* @since 1.2
|
|
*/
|
|
static final int SO_RCVBUF = 0x1002; // 4098
|
|
|
|
/**
|
|
* Sets the SO_REUSEADDR parameter on a socket
|
|
*/
|
|
static final int SO_REUSEADDR = 0x04; // 4
|
|
|
|
/**
|
|
* Option id for the TCP_NODELAY value
|
|
*/
|
|
static final int TCP_NODELAY = 0x01; // 1
|
|
|
|
/**
|
|
* Options id for the IP_MULTICAST_IF value
|
|
*/
|
|
static final int IP_MULTICAST_IF = 0x10; // 16
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Interface Methods
|
|
*/
|
|
|
|
/**
|
|
* Sets the specified option on a socket to the passed in object. For
|
|
* options that take an integer argument, the passed in object is an
|
|
* <code>Integer</code>. For options that are set to on or off, the
|
|
* value passed will be a <code>Boolean</code>. The <code>option_id</code>
|
|
* parameter is one of the defined constants in this interface.
|
|
*
|
|
* @param option_id The identifier of the option
|
|
* @param val The value to set the option to
|
|
*
|
|
* @exception SocketException If an error occurs
|
|
*/
|
|
void
|
|
setOption(int option_id, Object val) throws SocketException;
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* Returns the current setting of the specified option. The
|
|
* <code>Object</code> returned will be an <code>Integer</code> for options
|
|
* that have integer values. For options that are set to on or off, a
|
|
* <code>Boolean</code> will be returned. The <code>option_id</code>
|
|
* is one of the defined constants in this interface.
|
|
*
|
|
* @param option_id The option identifier
|
|
*
|
|
* @return The current value of the option
|
|
*
|
|
* @exception SocketException If an error occurs
|
|
*/
|
|
Object
|
|
getOption(int option_id) throws SocketException;
|
|
|
|
} // interface SocketOptions
|
|
|