org.jboss.ejb._private.NetworkUtil Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.jboss.ejb._private;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
/**
* @author Jaikiran Pai
*/
public class NetworkUtil {
private static int getInt(byte[] b, int offs) {
return (b[offs] & 0xff) << 24 | (b[offs + 1] & 0xff) << 16 | (b[offs + 2] & 0xff) << 8 | b[offs + 3] & 0xff;
}
private static long getLong(byte[] b, int offs) {
return (getInt(b, offs) & 0xFFFFFFFFL) << 32 | getInt(b, offs + 4) & 0xFFFFFFFFL;
}
private static int nwsl(int arg, int places) {
return places <= 0 ? arg : places >= 32 ? 0 : arg << places;
}
private static long nwsl(long arg, int places) {
return places <= 0 ? arg : places >= 64 ? 0L : arg << places;
}
/**
* Returns true if the passed address is part of the network represented by the passed networkAddress
* and networkMask. Else returns false
*
* @param address The address being checked
* @param networkAddress The network address
* @param networkMask The network mask bits
* @return
*/
public static boolean belongsToNetwork(final InetAddress address, final InetAddress networkAddress, final int networkMask) {
if (address == null || networkAddress == null) {
return false;
}
// a netmask of 0 means, it matches everything
if (networkMask == 0) {
return true;
}
// convert to bytes
final byte[] addressBytes = address.getAddress();
final byte[] networkAddressBytes = networkAddress.getAddress();
if (address instanceof Inet4Address && networkAddress instanceof Inet4Address) {
final int maskBits = nwsl(0xFFFFFFFF, 32 - networkMask);
final int addr = getInt(addressBytes, 0) & maskBits;
final int netAddr = getInt(networkAddressBytes, 0) & maskBits;
return addr == netAddr;
} else if (address instanceof Inet6Address && networkAddress instanceof Inet6Address) {
final long maskHigh = nwsl(0xFFFFFFFFFFFFFFFFL, 64 - networkMask);
final long maskLow = nwsl(0xFFFFFFFFFFFFFFFFL, 128 - networkMask);
final long addrHigh = getLong(addressBytes, 0) & maskHigh;
final long addrLow = getLong(addressBytes, 8) & maskLow;
final long netAddrHigh = getLong(networkAddressBytes, 0) & maskHigh;
final long netAddrLow = getLong(networkAddressBytes, 8) & maskLow;
return addrHigh == netAddrHigh && addrLow == netAddrLow;
} else {
return false;
}
}
public static String formatPossibleIpv6Address(String address) {
if (address == null) {
return null;
}
if (!address.contains(":")) {
return address;
}
if (address.startsWith("[") && address.endsWith("]")) {
return address;
}
return "[" + address + "]";
}
}