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/*-
* ============LICENSE_START==========================================
* OPENECOMP - DCAE
* ===================================================================
* Copyright (c) 2017 AT&T Intellectual Property. All rights reserved.
* ===================================================================
* 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.
* ============LICENSE_END============================================
*/
package org.openecomp.ncomp.webservice.utils;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.StringTokenizer;
import java.util.regex.Pattern;
public class IpUtils {
public static long toLong(String Ip) {
long res = 0;
try {
StringTokenizer tokens = new StringTokenizer(Ip, ".");
for (int i = 0; i < 4; i++) {
int t = Integer.parseInt(tokens.nextToken());
if (t < 0 || t > 255) {
throw new RuntimeException("Bad IP: " + Ip);
}
res = 256 * res + t;
}
} catch (Exception e) {
throw new RuntimeException("Bad IP: " + Ip);
}
return res;
}
public static int toInt(String Ip) {
long x = toLong(Ip);
// if (x<(1<<31)) return (int) x;
// TODO: does this really work??
// System.out.println(Ip + " " + x);
return (int) x;
}
public static String toString(int i) {
return ((i >> 24) & 0xFF) + "." + ((i >> 16) & 0xFF) + "." + ((i >> 8) & 0xFF) + "." + (i & 0xFF);
}
public static int mask2masklen(String string) {
// 255.255.255.252 -> 30
if (!isIp(string)) {
return Integer.parseInt(string);
}
if (isIpv6(string)) {
throw new RuntimeException("IPv6 is not supported, just use mask length");
}
StringTokenizer st = new StringTokenizer(string,".");
int len = 0;
for (int j = 0; j < 4; j++) {
int i = Integer.parseInt(st.nextToken());
for (int x = 0; x < 8; x++) {
if ((i >> x) % 2 == 1) {
len += 8 - x;
break;
}
}
}
return len;
}
private static int[] maskvals = {0,32,31,6,30,9,5,-1,29,16,8,2,4,21,-1,19,28,
25,15,-1,7,10,1,17,3,22,20,26,-1,11,18,23,27,12,24,13,14};
public static int mask2masklen (int ip) {
// This works because 2 is a primitive root mod 37!
// The negation is because % is remainder, not modulus
int indx = -(ip % 37);
if (indx < 0) return -1; // caution for non-masks
return maskvals[indx];
}
public static String toPrefixString(int ip, int len) {
ip = (ip >> (32-len)) << (32-len);
return IpUtils.toString(ip) + "/" + len;
}
private static Pattern ipv4Pattern = Pattern.compile("\\d*\\.\\d*\\.\\d*\\.\\d*");
public static boolean isIpv4(String to) {
if (to.isEmpty()) return false;
char c = to.charAt(0);
if (c > '9' || c < '0') return false;
return ipv4Pattern.matcher(to).matches();
}
private static Pattern ipv6Pattern = Pattern.compile("[0-9a-fA-F]*:[0-9a-fA-F]*:[0-9a-fA-F:]*");
public static boolean isIpv6(String to) {
// bad heuristic but likely works most of the time.
return ipv6Pattern.matcher(to).matches();
}
public static boolean isIp(String to) {
return isIpv6(to) || isIpv4(to);
}
static int numBad = 0;
public static InetAddress toInetAddress(String string) {
if (!isIp(string)) return null;
try {
return InetAddress.getByName(string);
} catch (UnknownHostException e) {
if (numBad > 1000) {
e.printStackTrace();
// We exit here since it is important not to do lots of DNS lookups
// We should validate that the string is a valid IP somehow.
System.exit(-3);
}
}
return null;
}
public static String toPrefixString(InetAddress ip, int len) {
return mask(ip, len).getHostAddress() + "/" + len;
}
public static String toString(InetAddress ip) {
return ip.getHostAddress();
}
public static InetAddress mask(InetAddress ip, int prefixMask) {
int oddBits = prefixMask % 8;
int nMaskBytes = prefixMask/8 + (oddBits == 0 ? 0 : 1);
byte[] mask = new byte[nMaskBytes];
// byte[] addr = Arrays.copyOf(ip.getAddress(), ip.getAddress().length);
// To make this Java 5 compactible.
byte[] addr = new byte[ip.getAddress().length];
for (int i =0 ; i < ip.getAddress().length ; i ++)
addr[i]=ip.getAddress()[i];
Arrays.fill(mask, 0, oddBits == 0 ? mask.length : mask.length - 1, (byte)0xFF);
if (oddBits != 0) {
int finalByte = (1 << oddBits) - 1;
finalByte <<= 8-oddBits;
mask[mask.length - 1] = (byte) finalByte;
}
for (int i=0; i < mask.length; i++) {
addr[i] = (byte) (addr[i] & mask[i]);
}
for (int i=nMaskBytes; i < addr.length; i++) {
addr[i] = 0;
}
try {
return InetAddress.getByAddress(addr);
} catch (UnknownHostException e) {
e.printStackTrace();
System.exit(2);
}
return null;
}
public static int mask (int ip, int masklen) {
if (masklen == 0) return 0;
return ip & -(1 << (32-masklen));
}
public static String defaultPrefix(String tmVersion) {
if (tmVersion.equals("6")) {
return "::/0";
}
return "0.0.0.0/0";
}
public static boolean containedIn(InetAddress ip, InetAddress ip2, int mask) {
return (mask(ip, mask).equals(mask(ip2, mask)));
}
public static InetAddress anonymize(InetAddress ip) {
byte[] a = ip.getAddress();
byte[] a2 = Arrays.copyOf(a, a.length);
a2[a.length-1] = (byte) (a2[a.length-1] ^ 17);
try {
return InetAddress.getByAddress(a2);
} catch (UnknownHostException e) {
e.printStackTrace();
System.exit(3);
}
return null;
}
public static boolean isIpv4(InetAddress ip) {
return ip.getAddress().length == 4;
}
public static String firstIp(String prefix) {
String a[] = prefix.split("/");
int ip = toInt(a[0]);
int len = Integer.parseInt(a[1]);
ip = mask(ip,len);
return toString(ip);
}
public static String lastIp(String prefix) {
String a[] = prefix.split("/");
int ip = toInt(a[0]);
int len = Integer.parseInt(a[1]);
if (len == 0) return "255.255.255.255";
ip = mask(ip,len) + (1 << (32-len)) - 1;
return toString(ip);
}
}
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