1 /* 2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.net.NetworkInterface; 25 import java.net.InetSocketAddress; 26 import java.net.SocketAddress; 27 import java.net.InetAddress; 28 import java.net.Inet4Address; 29 import java.net.SocketException; 30 import java.io.IOException; 31 import java.io.PrintStream; 32 import java.io.UnsupportedEncodingException; 33 import java.util.List; 34 import java.util.ArrayList; 35 import java.util.Set; 36 import java.util.Collections; 37 import java.util.Enumeration; 38 import java.util.Iterator; 39 import java.nio.ByteBuffer; 40 import com.sun.nio.sctp.SctpChannel; 41 import static java.lang.System.out; 42 43 public class Util { 44 static final int SMALL_BUFFER = 128; 45 static final String SMALL_MESSAGE = 46 "Under the bridge and over the dam, looking for berries, berries for jam"; 47 48 static final int LARGE_BUFFER = 32768; 49 static final String LARGE_MESSAGE; 50 51 static { 52 StringBuffer sb = new StringBuffer(LARGE_BUFFER); 53 for (int i=0; i<460; i++) 54 sb.append(SMALL_MESSAGE); 55 56 LARGE_MESSAGE = sb.toString(); 57 } 58 isSCTPSupported()59 static boolean isSCTPSupported() { 60 try { 61 SctpChannel c = SctpChannel.open(); 62 c.close(); 63 return true; 64 } catch (IOException ioe) { 65 ioe.printStackTrace(); 66 } catch (UnsupportedOperationException e) { 67 out.println(e); 68 } 69 70 return false; 71 } 72 /** 73 * Returns a list of all the addresses on the system. 74 * @param inclLoopback 75 * if {@code true}, include the loopback addresses 76 * @param ipv4Only 77 * it {@code true}, only IPv4 addresses will be included 78 */ getAddresses(boolean inclLoopback, boolean ipv4Only)79 static List<InetAddress> getAddresses(boolean inclLoopback, 80 boolean ipv4Only) 81 throws SocketException { 82 ArrayList<InetAddress> list = new ArrayList<InetAddress>(); 83 Enumeration<NetworkInterface> nets = 84 NetworkInterface.getNetworkInterfaces(); 85 for (NetworkInterface netInf : Collections.list(nets)) { 86 Enumeration<InetAddress> addrs = netInf.getInetAddresses(); 87 for (InetAddress addr : Collections.list(addrs)) { 88 if (!list.contains(addr) && 89 (inclLoopback ? true : !addr.isLoopbackAddress()) && 90 (ipv4Only ? (addr instanceof Inet4Address) : true)) { 91 list.add(addr); 92 } 93 } 94 } 95 96 return list; 97 } 98 dumpAddresses(SctpChannel channel, PrintStream printStream)99 static void dumpAddresses(SctpChannel channel, 100 PrintStream printStream) 101 throws IOException { 102 Set<SocketAddress> addrs = channel.getAllLocalAddresses(); 103 printStream.println("Local Addresses: "); 104 for (Iterator<SocketAddress> it = addrs.iterator(); it.hasNext(); ) { 105 InetSocketAddress addr = (InetSocketAddress)it.next(); 106 printStream.println("\t" + addr); 107 } 108 } 109 110 /** 111 * Compare the contents of the given ByteBuffer with the contens of the 112 * given byte array. true if, and only if, the contents are the same. 113 */ compare(ByteBuffer bb, byte[] message)114 static boolean compare(ByteBuffer bb, byte[] message) { 115 if (message.length != bb.remaining()) { 116 out.println("Compare failed, byte array length != to buffer remaining"); 117 return false; 118 } 119 120 for (int i=0; i<message.length; i++) { 121 byte b = bb.get(); 122 if (message[i] != b) { 123 out.println("Position " + i + ": " + message[i] + " != " + b); 124 return false; 125 } 126 } 127 128 return true; 129 } 130 compare(ByteBuffer bb, String str)131 static boolean compare(ByteBuffer bb, String str) { 132 try{ 133 return Util.compare(bb, str.getBytes("ISO-8859-1")); 134 } catch (UnsupportedEncodingException unsupported) { 135 throw new AssertionError(unsupported); 136 } 137 } 138 } 139