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/*
* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.net.NetworkInterface;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.SocketException;
import java.io.IOException;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.ArrayList;
import java.util.Set;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.nio.ByteBuffer;
import com.sun.nio.sctp.SctpChannel;
import static java.lang.System.out;
public class Util {
static final int SMALL_BUFFER = 128;
static final String SMALL_MESSAGE =
"Under the bridge and over the dam, looking for berries, berries for jam";
static final int LARGE_BUFFER = 32768;
static final String LARGE_MESSAGE;
static {
StringBuffer sb = new StringBuffer(LARGE_BUFFER);
for (int i=0; i<460; i++)
sb.append(SMALL_MESSAGE);
LARGE_MESSAGE = sb.toString();
}
static boolean isSCTPSupported() {
try {
SctpChannel c = SctpChannel.open();
c.close();
return true;
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (UnsupportedOperationException e) {
out.println(e);
}
return false;
}
/**
* Returns a list of all the addresses on the system.
* @param inclLoopback
* if {@code true}, include the loopback addresses
* @param ipv4Only
* it {@code true}, only IPv4 addresses will be included
*/
static List<InetAddress> getAddresses(boolean inclLoopback,
boolean ipv4Only)
throws SocketException {
ArrayList<InetAddress> list = new ArrayList<InetAddress>();
Enumeration<NetworkInterface> nets =
NetworkInterface.getNetworkInterfaces();
for (NetworkInterface netInf : Collections.list(nets)) {
Enumeration<InetAddress> addrs = netInf.getInetAddresses();
for (InetAddress addr : Collections.list(addrs)) {
if (!list.contains(addr) &&
(inclLoopback ? true : !addr.isLoopbackAddress()) &&
(ipv4Only ? (addr instanceof Inet4Address) : true)) {
list.add(addr);
}
}
}
return list;
}
static void dumpAddresses(SctpChannel channel,
PrintStream printStream)
throws IOException {
Set<SocketAddress> addrs = channel.getAllLocalAddresses();
printStream.println("Local Addresses: ");
for (Iterator<SocketAddress> it = addrs.iterator(); it.hasNext(); ) {
InetSocketAddress addr = (InetSocketAddress)it.next();
printStream.println("\t" + addr);
}
}
/**
* Compare the contents of the given ByteBuffer with the contens of the
* given byte array. true if, and only if, the contents are the same.
*/
static boolean compare(ByteBuffer bb, byte[] message) {
if (message.length != bb.remaining()) {
out.println("Compare failed, byte array length != to buffer remaining");
return false;
}
for (int i=0; i<message.length; i++) {
byte b = bb.get();
if (message[i] != b) {
out.println("Position " + i + ": " + message[i] + " != " + b);
return false;
}
}
return true;
}
static boolean compare(ByteBuffer bb, String str) {
try{
return Util.compare(bb, str.getBytes("ISO-8859-1"));
} catch (UnsupportedEncodingException unsupported) {
throw new AssertionError(unsupported);
}
}
}
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