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/**
* CAM port implementation
*
* @author ETSI / STF424
* @version $URL$
* $Id$
*
*/
package org.etsi.its.adapter.ports;
import java.util.HashMap;
import java.util.Map;
import org.etsi.common.ByteHelper;
import org.etsi.its.adapter.layers.BtpLayer;
import org.etsi.its.adapter.layers.GnLayer;
/**
* CAM port implementation
*/
public class CamPort extends ProtocolPort {
* Constructor
* @param portName Name of the port
* @param componentName Name of the component owning this port instance
* @param lowerStackDesc Description of the port's lower stack in the form "Layer/Layer/Layer/..."
* @param linkLayerAddress Link-layer address to be used by this port as source address (null if not applicable)
*/
public CamPort(String portName, String componentName, String lowerStackDesc, String linkLayerAddress) {
super(portName, componentName, lowerStackDesc, linkLayerAddress);
}
/* (non-Javadoc)
* @see org.etsi.its.adapter.ports.ProtocolPort#receive(byte[], java.util.Map)
*/
@Override
public void receive(byte[] message, Map<String, Object> lowerInfo) {
// TERFactory.getInstance().logDebug(">>> denmPort.receive: " + ByteHelper.byteArrayToString(message));
if (message[1] != 0x02) { // Check that received packet has CAM message id
TERFactory.getInstance().logDebug("camPort.receive: drop packet " + ByteHelper.byteArrayToString(message));
return; // Drop it
}
// Encode with CAM indication header
byte[] msgInd = ByteHelper.concat(
new byte[] { (Byte) lowerInfo.get(GnLayer.GN_NEXTHEADER) },
ByteHelper.intToByteArray((Integer) lowerInfo.get(GnLayer.GN_TYPE), 1),
ByteHelper.intToByteArray((Integer) lowerInfo.get(GnLayer.GN_SUBTYPE), 1),
ByteHelper.intToByteArray((Integer) lowerInfo.get(GnLayer.GN_LIFETIME), Integer.SIZE / Byte.SIZE),
ByteHelper.intToByteArray((Integer) lowerInfo.get(GnLayer.GN_TRAFFICCLASS), 1),
(byte[]) lowerInfo.get(BtpLayer.BTP_DSTPORT),
(byte[]) lowerInfo.get(BtpLayer.BTP_DSTPORTINFO)
);
// Add security info to pass to the ATS
if (lowerInfo.get(SecurityHelper.SEC_SSP) == null) {
byte[] buf = new byte[16];
msgInd = ByteHelper.concat(msgInd, buf);
} else {
msgInd = ByteHelper.concat(msgInd, (byte[])lowerInfo.get(SecurityHelper.SEC_SSP));
}
if (lowerInfo.get(SecurityHelper.SEC_ITS_AID) == null) { // It shall not be possible to have SSP absent and ATS_AID present but...
msgInd = ByteHelper.concat(msgInd, new byte[] { (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00 });
} else {
msgInd = ByteHelper.concat(msgInd, (byte[])lowerInfo.get(SecurityHelper.SEC_ITS_AID));
}
super.receive(msgInd, lowerInfo);
}
/* (non-Javadoc)
* @see org.etsi.its.adapter.ports.IPort#send(byte[])
*/
@Override
public boolean send(byte[] message) {
HashMap<String, Object> params = new HashMap<String, Object>();
params.put(BtpLayer.BTP_TYPE, BtpLayer.TYPE_B);
params.put(BtpLayer.BTP_DSTPORT, 2001);
params.put(BtpLayer.BTP_SRCPORT, 500);
params.put(GnLayer.GN_TYPE, GnLayer.HT_TSB);
params.put(GnLayer.GN_SUBTYPE, GnLayer.HST_SINGLEHOP);
params.put(GnLayer.GN_NEXTHEADER, "BTP-B");