/*
* $Id$
*
* 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.prism2;
import org.jnode.util.LittleEndian;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
final class Prism2InfoFrame implements Prism2Constants {
/**
* Length of the header of an Info frame.
*/
static final int HDR_LENGTH = 4;
/**
* Maximum lenght on an Info frame
*/
static final int MAX_FRAME_LEN = BAP_DATALEN_MAX;
/**
* Gets the framelength of an Info frame.
*
* @param src
* @param srcOffset
* @return The frame length in bytes (including the length of the header)
*/
public static final int getFrameLength(byte[] src, int srcOffset) {
return (LittleEndian.getInt16(src, srcOffset) + 1) * 2;
}
/**
* Gets the infotype of an Info frame.
*
* @param src
* @param srcOffset
* @return
*/
public static final InformationType getInfoType(byte[] src, int srcOffset) {
return InformationType.getByValue(LittleEndian.getInt16(src, srcOffset + 2) & 0xFFFF);
}
/**
* Gets the link status of an IT_LINKSTATUS frame.
*
* @param src
* @param srcOffset
* @return
*/
public static final LinkStatus getLinkStatus(byte[] src, int srcOffset) {
return LinkStatus.getByValue(LittleEndian.getInt16(src, srcOffset + HDR_LENGTH) & 0xFFFF);
}
}