import java.util.Arrays;
 
import ru.bitel.bgbilling.kernel.network.dhcp.DhcpPacket;
import ru.bitel.bgbilling.kernel.network.dhcp.DhcpProtocolHandler;
import ru.bitel.bgbilling.modules.inet.access.sa.ProtocolHandlerAdapter;
import ru.bitel.bgbilling.modules.inet.dhcp.InetDhcpProcessor;
 
public class Dhcp82ProtocolHandler
	extends ProtocolHandlerAdapter
	implements DhcpProtocolHandler
{
	@Override
	public void preprocessDhcpRequest( DhcpPacket request, DhcpPacket response )
		throws Exception
	{
		byte[] agentRemoteId = request.getSubOption( (byte)2 ).value;
		// DLink
		if( agentRemoteId.length == 8 )
		{
			request.setOption( InetDhcpProcessor.AGENT_REMOTE_ID, Arrays.copyOfRange( agentRemoteId, 2, 6 ) );
		}
		else
		{
			request.setOption( InetDhcpProcessor.AGENT_REMOTE_ID, Arrays.copyOfRange( agentRemoteId, 5, 6 ) );
		}
	}
}