From bbbc051aa70b8c3dc98218b7b7ca23bea588f41a Mon Sep 17 00:00:00 2001 From: Joe Robinson Date: Wed, 27 Oct 2010 17:16:37 +0100 Subject: Removed duplicate org.apache.commons files --- org/apache/commons/net/util/SubnetUtils.java | 211 --------------------------- 1 file changed, 211 deletions(-) delete mode 100644 org/apache/commons/net/util/SubnetUtils.java (limited to 'org/apache/commons/net/util/SubnetUtils.java') diff --git a/org/apache/commons/net/util/SubnetUtils.java b/org/apache/commons/net/util/SubnetUtils.java deleted file mode 100644 index 90cc6e8..0000000 --- a/org/apache/commons/net/util/SubnetUtils.java +++ /dev/null @@ -1,211 +0,0 @@ -/* - * 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.commons.net.util; - -import java.util.regex.Matcher; -import java.util.regex.Pattern; - -/** - * A class that performs some subnet calculations given a network address and a subnet mask. - * @see http://www.faqs.org/rfcs/rfc1519.html - * @author - * @since 2.0 - */ -public class SubnetUtils { - - private static final String IP_ADDRESS = "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})"; - private static final String SLASH_FORMAT = IP_ADDRESS + "/(\\d{1,3})"; - private static final Pattern addressPattern = Pattern.compile(IP_ADDRESS); - private static final Pattern cidrPattern = Pattern.compile(SLASH_FORMAT); - private static final int NBITS = 32; - - private int netmask = 0; - private int address = 0; - private int network = 0; - private int broadcast = 0; - - /** - * Constructor that takes a CIDR-notation string, e.g. "192.168.0.1/16" - * @param cidrNotation A CIDR-notation string, e.g. "192.168.0.1/16" - */ - public SubnetUtils(String cidrNotation) { - calculate(cidrNotation); - } - - /** - * Constructor that takes two dotted decimal addresses. - * @param address An IP address, e.g. "192.168.0.1" - * @param mask A dotted decimal netmask e.g. "255.255.0.0" - */ - public SubnetUtils(String address, String mask) { - calculate(toCidrNotation(address, mask)); - } - - /** - * Convenience container for subnet summary information. - * - */ - public final class SubnetInfo { - private SubnetInfo() {} - - private int netmask() { return netmask; } - private int network() { return network; } - private int address() { return address; } - private int broadcast() { return broadcast; } - private int low() { return network() + 1; } - private int high() { return broadcast() - 1; } - - public boolean isInRange(String address) { return isInRange(toInteger(address)); } - private boolean isInRange(int address) { return ((address-low()) <= (high()-low())); } - - public String getBroadcastAddress() { return format(toArray(broadcast())); } - public String getNetworkAddress() { return format(toArray(network())); } - public String getNetmask() { return format(toArray(netmask())); } - public String getAddress() { return format(toArray(address())); } - public String getLowAddress() { return format(toArray(low())); } - public String getHighAddress() { return format(toArray(high())); } - public int getAddressCount() { return (broadcast() - low()); } - - public int asInteger(String address) { return toInteger(address); } - - public String getCidrSignature() { - return toCidrNotation( - format(toArray(address())), - format(toArray(netmask())) - ); - } - - public String[] getAllAddresses() { - String[] addresses = new String[getAddressCount()]; - for (int add = low(), j=0; add <= high(); ++add, ++j) { - addresses[j] = format(toArray(add)); - } - return addresses; - } - } - - /** - * Return a {@link SubnetInfo} instance that contains subnet-specific statistics - * @return - */ - public final SubnetInfo getInfo() { return new SubnetInfo(); } - - /* - * Initialize the internal fields from the supplied CIDR mask - */ - private void calculate(String mask) { - Matcher matcher = cidrPattern.matcher(mask); - - if (matcher.matches()) { - address = matchAddress(matcher); - - /* Create a binary netmask from the number of bits specification /x */ - int cidrPart = rangeCheck(Integer.parseInt(matcher.group(5)), 0, NBITS-1); - for (int j = 0; j < cidrPart; ++j) { - netmask |= (1 << 31-j); - } - - /* Calculate base network address */ - network = (address & netmask); - - /* Calculate broadcast address */ - broadcast = network | ~(netmask); - } - else - throw new IllegalArgumentException("Could not parse [" + mask + "]"); - } - - /* - * Convert a dotted decimal format address to a packed integer format - */ - private int toInteger(String address) { - Matcher matcher = addressPattern.matcher(address); - if (matcher.matches()) { - return matchAddress(matcher); - } - else - throw new IllegalArgumentException("Could not parse [" + address + "]"); - } - - /* - * Convenience method to extract the components of a dotted decimal address and - * pack into an integer using a regex match - */ - private int matchAddress(Matcher matcher) { - int addr = 0; - for (int i = 1; i <= 4; ++i) { - int n = (rangeCheck(Integer.parseInt(matcher.group(i)), 0, 255)); - addr |= ((n & 0xff) << 8*(4-i)); - } - return addr; - } - - /* - * Convert a packed integer address into a 4-element array - */ - private int[] toArray(int val) { - int ret[] = new int[4]; - for (int j = 3; j >= 0; --j) - ret[j] |= ((val >>> 8*(3-j)) & (0xff)); - return ret; - } - - /* - * Convert a 4-element array into dotted decimal format - */ - private String format(int[] octets) { - StringBuilder str = new StringBuilder(); - for (int i =0; i < octets.length; ++i){ - str.append(octets[i]); - if (i != octets.length - 1) { - str.append("."); - } - } - return str.toString(); - } - - /* - * Convenience function to check integer boundaries - */ - private int rangeCheck(int value, int begin, int end) { - if (value >= begin && value <= end) - return value; - - throw new IllegalArgumentException("Value out of range: [" + value + "]"); - } - - /* - * Count the number of 1-bits in a 32-bit integer using a divide-and-conquer strategy - * see Hacker's Delight section 5.1 - */ - int pop(int x) { - x = x - ((x >>> 1) & 0x55555555); - x = (x & 0x33333333) + ((x >>> 2) & 0x33333333); - x = (x + (x >>> 4)) & 0x0F0F0F0F; - x = x + (x >>> 8); - x = x + (x >>> 16); - return x & 0x0000003F; - } - - /* Convert two dotted decimal addresses to a single xxx.xxx.xxx.xxx/yy format - * by counting the 1-bit population in the mask address. (It may be better to count - * NBITS-#trailing zeroes for this case) - */ - private String toCidrNotation(String addr, String mask) { - return addr + "/" + pop(toInteger(mask)); - } -} -- cgit v1.2.3