/*
* 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;
/**
* LinkLayer.java
*
*/
/**
* LinkLayer driver.
*/
public abstract class LinkLayer implements Runnable {
protected Ejip ejip;
/** Own IP address */
protected int ip; // own ip address
// TODO: make ip, gateway, netmask package visible again
/** */
private int gateway;
/** Subnet mask */
private int netmask;
PacketQueue txQueue;
PacketQueue rxQueue;
public LinkLayer(Ejip ejipRef, int ipAddress) {
ip = ipAddress;
ejip = ejipRef;
txQueue = new PacketQueue(ejip.getMaxPackets());
rxQueue = new PacketQueue(ejip.getMaxPackets());
ejip.registerLinkLayer(this);
}
public int getIpAddress() {
return ip;
}
public void enqTxPacket(Packet p) {
txQueue.enq(p);
}
/**
* Set connection strings and connect.
*/
public void startConnection(StringBuffer dialstr, StringBuffer connect, StringBuffer user, StringBuffer passwd) {
// default implementation does nothing
}
/**
* Forces the connection to be new established.
* On Slip and CS8900 ignored.
*/
public void reconnect() {
}
/**
* Used for PPP and Oebb project.
* @return
*/
public int getConnCount() {
return 0;
}
public void disconnect() {
// only usefull for PPP
}
/**
* @param remoteAddr
* @return true if the remote address is in the same subnet or if no gateway
* is given
*/
public boolean isSameSubnet(int remoteAddr) {
if (gateway == 0)
return true;
int test1 = /* ip & */ netmask;
int test2 = remoteAddr & netmask;
return (test1 ^ test2) == 0;
}
// TODO: JOPizer needs the run method here, don't know why?
public void run() {}
}