/*
* Copyright (c) Martin Schoeberl, martin@jopdesign.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Martin Schoeberl
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
package ejip_old;
/**
* Loopback.java
*
* Loopback link layer driver.
*/
/**
* Loopback driver.
*/
public class Loopback extends LinkLayer {
private static final int MAX_BUF = 1500; // or should we use 1006
/**
* The one and only reference to this object.
*/
private static Loopback single;
/**
* private constructor. The singleton object is created in init().
*/
private Loopback() {
}
/**
* allocate buffer, start serial buffer and slip Thread.
*/
public static LinkLayer init() {
if (single != null) return single; // allready called init()
single = new Loopback();
single.ip = (127<<24) + (0<<16) + (0<<8) + 1;
return single;
}
public int getIpAddress() {
return ip;
}
/**
* Set connection strings and connect.
*/
public void startConnection(StringBuffer dialstr, StringBuffer connect, StringBuffer user, StringBuffer passwd) {
// useless for loopback driver
}
/**
* Forces the connection to be new established.
* On Slip ignored.
*/
public void reconnect() {
}
static int timer;
/**
* main loop.
*/
public void loop() {
Packet p;
//
// get a ready to send packet with source from this driver.
//
p = Packet.getPacket(single, Packet.SND_DGRAM, Packet.ALLOC);
// TODO: we need to copy a TCP packet
if (p!=null) {
//
// and simple mark it as received packet.
//
p.setStatus(Packet.RCV); // inform upper layer
}
}
/* (non-Javadoc)
* @see ejip.LinkLayer#getConnCount()
*/
public int getConnCount() {
return 0;
}
}