| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.flex.utilities.converter.retrievers.download; |
| |
| import java.net.NetworkInterface; |
| import java.net.SocketException; |
| import java.util.Arrays; |
| import java.util.Enumeration; |
| |
| public abstract class SystemIdHelper { |
| |
| public static String getSystemId() { |
| try { |
| Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces(); |
| byte[] macSum = new byte[] { 0,0,0,0,0,0}; |
| while (nis.hasMoreElements()) { |
| NetworkInterface ni = nis.nextElement(); |
| byte[] mac = ni.getHardwareAddress(); |
| if((mac != null) && (mac.length >= 6)) { |
| macSum[0] = (byte) ((macSum[0] + mac[0]) % 256); |
| macSum[1] = (byte) ((macSum[1] + mac[1]) % 256); |
| macSum[2] = (byte) ((macSum[2] + mac[2]) % 256); |
| macSum[3] = (byte) ((macSum[3] + mac[3]) % 256); |
| macSum[4] = (byte) ((macSum[4] + mac[4]) % 256); |
| macSum[5] = (byte) ((macSum[5] + mac[5]) % 256); |
| } |
| } |
| return Integer.toHexString(Arrays.hashCode(macSum)); |
| } catch (SocketException e) { |
| return null; |
| } |
| } |
| |
| } |
