* 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.
package org.onap.aaf.cadi.util;
-/*
+/*
* NetMask - a class to quickly validate whether a given IP is part of a mask, as defined by bytes or standard String format.
- *
- * Needs the IPV6 Mask Builder.
+ *
+ * Needs the IPV6 Mask Builder.
*/
public class NetMask {
- private long mask;
+ private long mask;
+
+ public NetMask(byte[] inBytes) {
+ mask = derive(inBytes);
+ }
+
+ public NetMask(String string) throws MaskFormatException {
+ mask = derive(string,true);
+ }
+
+ public boolean isInNet(byte[] inBytes) {
+ long addr = derive(inBytes);
+ return (mask & addr) == addr;
+ }
- public NetMask(byte[] inBytes) {
- mask = derive(inBytes);
- }
-
- public NetMask(String string) throws MaskFormatException {
- mask = derive(string,true);
- }
-
- public boolean isInNet(byte[] inBytes) {
- long addr = derive(inBytes);
- return (mask & addr) == addr;
- }
-
- public boolean isInNet(String str) {
- long addr;
- try {
- addr = derive(str,false);
- return (mask & addr) == addr;
- } catch (MaskFormatException e) {
- // will not hit this code;
- return false;
- }
- }
+ public boolean isInNet(String str) {
+ long addr;
+ try {
+ addr = derive(str,false);
+ return (mask & addr) == addr;
+ } catch (MaskFormatException e) {
+ // will not hit this code;
+ return false;
+ }
+ }
- public static long derive(byte[] inBytes) {
- long addr = 0L;
- int offset = inBytes.length*8;
- for(int i=0;i<inBytes.length;++i) {
- addr&=(inBytes[i]<<offset);
- offset-=8;
- }
- return addr;
- }
+ public static long derive(byte[] inBytes) {
+ long addr = 0L;
+ int offset = inBytes.length*8;
+ for (int i=0;i<inBytes.length;++i) {
+ addr&=(inBytes[i]<<offset);
+ offset-=8;
+ }
+ return addr;
+ }
- public static long derive(String str, boolean check) throws MaskFormatException {
- long rv=0L;
- int idx=str.indexOf(':');
- int slash = str.indexOf('/');
+ public static long derive(String str, boolean check) throws MaskFormatException {
+ long rv=0L;
+ int idx=str.indexOf(':');
+ int slash = str.indexOf('/');
- if(idx<0) { // Not IPV6, so it's IPV4... Is there a mask of 123/254?
- idx=str.indexOf('.');
- int offset = 24;
- int end = slash>=0?slash:str.length();
- int bits = slash>=0?Integer.parseInt(str.substring(slash+1)):32;
- if(check && bits>32) {
- throw new MaskFormatException("Invalid Mask Offset in IPV4 Address");
- }
- int prev = 0;
- long lbyte;
- while(prev<end) {
- if(idx<0) {
- idx = end;
- }
- lbyte = Long.parseLong(str.substring(prev, idx));
- if(check && (lbyte>255 || lbyte<0)) {
- throw new MaskFormatException("Invalid Byte in IPV4 Address");
- }
- rv|=lbyte<<offset;
- prev = ++idx;
- idx=str.indexOf('.',prev);
- offset-=8;
- }
- rv|=0x00000000FFFFFFFFL>>bits;
- }
- return rv;
- }
+ if (idx<0) { // Not IPV6, so it's IPV4... Is there a mask of 123/254?
+ idx=str.indexOf('.');
+ int offset = 24;
+ int end = slash>=0?slash:str.length();
+ int bits = slash>=0?Integer.parseInt(str.substring(slash+1)):32;
+ if (check && bits>32) {
+ throw new MaskFormatException("Invalid Mask Offset in IPV4 Address");
+ }
+ int prev = 0;
+ long lbyte;
+ while (prev<end) {
+ if (idx<0) {
+ idx = end;
+ }
+ lbyte = Long.parseLong(str.substring(prev, idx));
+ if (check && (lbyte>255 || lbyte<0)) {
+ throw new MaskFormatException("Invalid Byte in IPV4 Address");
+ }
+ rv|=lbyte<<offset;
+ prev = ++idx;
+ idx=str.indexOf('.',prev);
+ offset-=8;
+ }
+ rv|=0x00000000FFFFFFFFL>>bits;
+ }
+ return rv;
+ }
}