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Diffstat (limited to 'central/src/main/java/edazdarevic/commons/net/CIDRUtils.java')
| -rw-r--r-- | central/src/main/java/edazdarevic/commons/net/CIDRUtils.java | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/central/src/main/java/edazdarevic/commons/net/CIDRUtils.java b/central/src/main/java/edazdarevic/commons/net/CIDRUtils.java deleted file mode 100644 index 159f99d..0000000 --- a/central/src/main/java/edazdarevic/commons/net/CIDRUtils.java +++ /dev/null @@ -1,142 +0,0 @@ -/* - * The MIT License - * - * Copyright (c) 2013 Edin Dazdarevic (edin.dazdarevic@gmail.com) - - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - * - * */ - -package edazdarevic.commons.net; - -import java.math.BigInteger; -import java.net.InetAddress; -import java.net.UnknownHostException; -import java.nio.ByteBuffer; -import java.util.ArrayList; -import java.util.List; - -/** - * A class that enables to get an IP range from CIDR specification. It supports - * both IPv4 and IPv6. - */ -public class CIDRUtils { - private final String cidr; - - private InetAddress inetAddress; - private InetAddress startAddress; - private InetAddress endAddress; - private final int prefixLength; - - - public CIDRUtils(String cidr) throws UnknownHostException { - - this.cidr = cidr; - - /* split CIDR to address and prefix part */ - if (this.cidr.contains("/")) { - int index = this.cidr.indexOf("/"); - String addressPart = this.cidr.substring(0, index); - String networkPart = this.cidr.substring(index + 1); - - inetAddress = InetAddress.getByName(addressPart); - prefixLength = Integer.parseInt(networkPart); - - calculate(); - } else { - throw new IllegalArgumentException("not an valid CIDR format!"); - } - } - - - private void calculate() throws UnknownHostException { - - ByteBuffer maskBuffer; - int targetSize; - if (inetAddress.getAddress().length == 4) { - maskBuffer = - ByteBuffer - .allocate(4) - .putInt(-1); - targetSize = 4; - } else { - maskBuffer = ByteBuffer.allocate(16) - .putLong(-1L) - .putLong(-1L); - targetSize = 16; - } - - BigInteger mask = (new BigInteger(1, maskBuffer.array())).not().shiftRight(prefixLength); - - ByteBuffer buffer = ByteBuffer.wrap(inetAddress.getAddress()); - BigInteger ipVal = new BigInteger(1, buffer.array()); - - BigInteger startIp = ipVal.and(mask); - BigInteger endIp = startIp.add(mask.not()); - - byte[] startIpArr = toBytes(startIp.toByteArray(), targetSize); - byte[] endIpArr = toBytes(endIp.toByteArray(), targetSize); - - this.startAddress = InetAddress.getByAddress(startIpArr); - this.endAddress = InetAddress.getByAddress(endIpArr); - - } - - private byte[] toBytes(byte[] array, int targetSize) { - int counter = 0; - List<Byte> newArr = new ArrayList<Byte>(); - while (counter < targetSize && (array.length - 1 - counter >= 0)) { - newArr.add(0, array[array.length - 1 - counter]); - counter++; - } - - int size = newArr.size(); - for (int i = 0; i < (targetSize - size); i++) { - - newArr.add(0, (byte) 0); - } - - byte[] ret = new byte[newArr.size()]; - for (int i = 0; i < newArr.size(); i++) { - ret[i] = newArr.get(i); - } - return ret; - } - - public String getNetworkAddress() { - - return this.startAddress.getHostAddress(); - } - - public String getBroadcastAddress() { - return this.endAddress.getHostAddress(); - } - - public boolean isInRange(String ipAddress) throws UnknownHostException { - InetAddress address = InetAddress.getByName(ipAddress); - BigInteger start = new BigInteger(1, this.startAddress.getAddress()); - BigInteger end = new BigInteger(1, this.endAddress.getAddress()); - BigInteger target = new BigInteger(1, address.getAddress()); - - int st = start.compareTo(target); - int te = target.compareTo(end); - - return (st == -1 || st == 0) && (te == -1 || te == 0); - } -}
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