/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.driver.net.ne2000;
import org.jnode.driver.Device;
import org.jnode.driver.DriverException;
import org.jnode.driver.net.NetworkException;
import org.jnode.driver.net.ethernet.spi.AbstractEthernetDriver;
import org.jnode.net.HardwareAddress;
import org.jnode.net.SocketBuffer;
import org.jnode.system.resource.ResourceNotFreeException;
import org.jnode.util.TimeoutException;
/**
* @author epr
*/
public abstract class Ne2000Driver extends AbstractEthernetDriver {
/**
* The actual device driver
*/
private Ne2000Core dd;
/**
* The device flags
*/
private final Ne2000Flags flags;
/**
* Create a new instance
*
* @param flags
*/
public Ne2000Driver(Ne2000Flags flags) {
this.flags = flags;
}
/**
* Gets the hardware address of this device
*/
public HardwareAddress getAddress() {
return dd.getHwAddress();
}
/**
* @see org.jnode.driver.net.spi.AbstractNetDriver#doTransmit(SocketBuffer,
* HardwareAddress)
*/
protected void doTransmitEthernet(SocketBuffer skbuf, HardwareAddress destination)
throws NetworkException {
try {
// Pad
if (skbuf.getSize() < ETH_ZLEN) {
skbuf.append(ETH_ZLEN - skbuf.getSize());
}
dd.transmit(skbuf, destination, 5000);
} catch (InterruptedException ex) {
throw new NetworkException("Interrupted", ex);
} catch (TimeoutException ex) {
throw new NetworkException("Timeout", ex);
}
}
/**
* @see org.jnode.driver.Driver#startDevice()
*/
protected void startDevice() throws DriverException {
try {
dd = newCore(getDevice(), flags);
dd.initialize();
super.startDevice();
} catch (ResourceNotFreeException ex) {
throw new DriverException("Cannot claim " + flags.getName() + " resources", ex);
}
}
/**
* Create a new Ne2000Core instance
*/
protected abstract Ne2000Core newCore(Device device, Ne2000Flags flags)
throws DriverException, ResourceNotFreeException;
/**
* @see org.jnode.driver.Driver#stopDevice()
*/
protected void stopDevice() throws DriverException {
super.stopDevice();
dd.disable();
dd.release();
dd = null;
}
/**
* Gets the device flags
*/
public Ne2000Flags getFlags() {
return flags;
}
}