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1513 lines (1311 loc) · 50.8 KB
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//
// 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 com.cloud.utils.net;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.URI;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Formatter;
import java.util.List;
import java.util.Random;
import java.util.Set;
import java.util.SortedSet;
import java.util.StringTokenizer;
import java.util.TreeSet;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang.SystemUtils;
import org.apache.commons.net.util.SubnetUtils;
import org.apache.commons.validator.routines.InetAddressValidator;
import org.apache.log4j.Logger;
import com.googlecode.ipv6.IPv6Address;
import com.googlecode.ipv6.IPv6AddressRange;
import com.googlecode.ipv6.IPv6Network;
import com.cloud.utils.IteratorUtil;
import com.cloud.utils.Pair;
import com.cloud.utils.script.Script;
public class NetUtils {
protected final static Logger s_logger = Logger.getLogger(NetUtils.class);
public final static String HTTP_PORT = "80";
public final static String HTTPS_PORT = "443";
public final static int VPN_PORT = 500;
public final static int VPN_NATT_PORT = 4500;
public final static int VPN_L2TP_PORT = 1701;
public final static int HAPROXY_STATS_PORT = 8081;
public final static String UDP_PROTO = "udp";
public final static String TCP_PROTO = "tcp";
public final static String ANY_PROTO = "any";
public final static String ICMP_PROTO = "icmp";
public final static String ALL_PROTO = "all";
public final static String HTTP_PROTO = "http";
public final static String SSL_PROTO = "ssl";
public final static String ALL_CIDRS = "0.0.0.0/0";
public final static int PORT_RANGE_MIN = 0;
public final static int PORT_RANGE_MAX = 65535;
public final static int DEFAULT_AUTOSCALE_VM_DESTROY_TIME = 2 * 60; // Grace period before Vm is destroyed
public final static int DEFAULT_AUTOSCALE_POLICY_INTERVAL_TIME = 30;
public final static int DEFAULT_AUTOSCALE_POLICY_QUIET_TIME = 5 * 60;
private final static Random s_rand = new Random(System.currentTimeMillis());
public static long createSequenceBasedMacAddress(long macAddress) {
return macAddress | 0x060000000000l | (((long)s_rand.nextInt(32768) << 25) & 0x00fffe000000l);
}
public static String getHostName() {
try {
InetAddress localAddr = InetAddress.getLocalHost();
if (localAddr != null) {
return localAddr.getHostName();
}
} catch (UnknownHostException e) {
s_logger.warn("UnknownHostException when trying to get host name. ", e);
}
return "localhost";
}
public static InetAddress getLocalInetAddress() {
try {
return InetAddress.getLocalHost();
} catch (UnknownHostException e) {
s_logger.warn("UnknownHostException in getLocalInetAddress().", e);
return null;
}
}
public static String resolveToIp(String host) {
try {
InetAddress addr = InetAddress.getByName(host);
return ipFromInetAddress(addr);
} catch (UnknownHostException e) {
s_logger.warn("Unable to resolve " + host + " to IP due to UnknownHostException");
return null;
}
}
public static InetAddress[] getAllLocalInetAddresses() {
List<InetAddress> addrList = new ArrayList<InetAddress>();
try {
for (NetworkInterface ifc : IteratorUtil.enumerationAsIterable(NetworkInterface.getNetworkInterfaces())) {
if (ifc.isUp() && !ifc.isVirtual()) {
for (InetAddress addr : IteratorUtil.enumerationAsIterable(ifc.getInetAddresses())) {
addrList.add(addr);
}
}
}
} catch (SocketException e) {
s_logger.warn("SocketException in getAllLocalInetAddresses().", e);
}
InetAddress[] addrs = new InetAddress[addrList.size()];
if (addrList.size() > 0) {
System.arraycopy(addrList.toArray(), 0, addrs, 0, addrList.size());
}
return addrs;
}
public static String[] getLocalCidrs() {
String defaultHostIp = getDefaultHostIp();
List<String> cidrList = new ArrayList<String>();
try {
for (NetworkInterface ifc : IteratorUtil.enumerationAsIterable(NetworkInterface.getNetworkInterfaces())) {
if (ifc.isUp() && !ifc.isVirtual() && !ifc.isLoopback()) {
for (InterfaceAddress address : ifc.getInterfaceAddresses()) {
InetAddress addr = address.getAddress();
int prefixLength = address.getNetworkPrefixLength();
if (prefixLength < 32 && prefixLength > 0) {
String ip = ipFromInetAddress(addr);
if (ip.equalsIgnoreCase(defaultHostIp))
cidrList.add(ipAndNetMaskToCidr(ip, getCidrNetmask(prefixLength)));
}
}
}
}
} catch (SocketException e) {
s_logger.warn("UnknownHostException in getLocalCidrs().", e);
}
return cidrList.toArray(new String[0]);
}
public static String getDefaultHostIp() {
if (SystemUtils.IS_OS_WINDOWS) {
Pattern pattern = Pattern.compile("\\s*0.0.0.0\\s*0.0.0.0\\s*(\\S*)\\s*(\\S*)\\s*");
try {
Process result = Runtime.getRuntime().exec("route print -4");
BufferedReader output = new BufferedReader(new InputStreamReader(result.getInputStream()));
String line = output.readLine();
while (line != null) {
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
return matcher.group(2);
}
line = output.readLine();
}
} catch (IOException e) {
s_logger.debug("Caught IOException", e);
}
return null;
} else {
NetworkInterface nic = null;
String pubNic = getDefaultEthDevice();
if (pubNic == null) {
return null;
}
try {
nic = NetworkInterface.getByName(pubNic);
} catch (final SocketException e) {
return null;
}
String[] info = null;
try {
info = NetUtils.getNetworkParams(nic);
} catch (NullPointerException ignored) {
s_logger.debug("Caught NullPointerException when trying to getDefaultHostIp");
}
if (info != null) {
return info[0];
}
return null;
}
}
public static String getDefaultEthDevice() {
if (SystemUtils.IS_OS_MAC) {
String defDev = Script.runSimpleBashScript("/sbin/route -n get default 2> /dev/null | grep interface | awk '{print $2}'");
return defDev;
}
String defaultRoute = Script.runSimpleBashScript("/sbin/route | grep default");
if (defaultRoute == null) {
return null;
}
String[] defaultRouteList = defaultRoute.split("\\s+");
if (defaultRouteList.length != 8) {
return null;
}
return defaultRouteList[7];
}
public static InetAddress getFirstNonLoopbackLocalInetAddress() {
InetAddress[] addrs = getAllLocalInetAddresses();
if (addrs != null) {
for (InetAddress addr : addrs) {
if (s_logger.isInfoEnabled()) {
s_logger.info("Check local InetAddress : " + addr.toString() + ", total count :" + addrs.length);
}
if (!addr.isLoopbackAddress()) {
return addr;
}
}
}
s_logger.warn("Unable to determine a non-loopback address, local inet address count :" + addrs.length);
return null;
}
public static InetAddress[] getInterfaceInetAddresses(String ifName) {
List<InetAddress> addrList = new ArrayList<InetAddress>();
try {
for (NetworkInterface ifc : IteratorUtil.enumerationAsIterable(NetworkInterface.getNetworkInterfaces())) {
if (ifc.isUp() && !ifc.isVirtual() && ifc.getName().equals(ifName)) {
for (InetAddress addr : IteratorUtil.enumerationAsIterable(ifc.getInetAddresses())) {
addrList.add(addr);
}
}
}
} catch (SocketException e) {
s_logger.warn("SocketException in getAllLocalInetAddresses().", e);
}
InetAddress[] addrs = new InetAddress[addrList.size()];
if (addrList.size() > 0) {
System.arraycopy(addrList.toArray(), 0, addrs, 0, addrList.size());
}
return addrs;
}
public static String getLocalIPString() {
InetAddress addr = getLocalInetAddress();
if (addr != null) {
return ipFromInetAddress(addr);
}
return "127.0.0.1";
}
public static String ipFromInetAddress(InetAddress addr) {
assert (addr != null);
byte[] ipBytes = addr.getAddress();
StringBuffer sb = new StringBuffer();
sb.append(ipBytes[0] & 0xff).append(".");
sb.append(ipBytes[1] & 0xff).append(".");
sb.append(ipBytes[2] & 0xff).append(".");
sb.append(ipBytes[3] & 0xff);
return sb.toString();
}
public static boolean isLocalAddress(InetAddress addr) {
InetAddress[] addrs = getAllLocalInetAddresses();
if (addrs != null) {
for (InetAddress self : addrs) {
if (self.equals(addr)) {
return true;
}
}
}
return false;
}
public static boolean isLocalAddress(String strAddress) {
InetAddress addr;
try {
addr = InetAddress.getByName(strAddress);
return isLocalAddress(addr);
} catch (UnknownHostException e) {
}
return false;
}
public static String getMacAddress(InetAddress address) {
StringBuffer sb = new StringBuffer();
Formatter formatter = new Formatter(sb);
try {
NetworkInterface ni = NetworkInterface.getByInetAddress(address);
byte[] mac = ni.getHardwareAddress();
for (int i = 0; i < mac.length; i++) {
formatter.format("%02X%s", mac[i], (i < mac.length - 1) ? ":" : "");
}
} catch (SocketException e) {
s_logger.error("SocketException when trying to retrieve MAC address", e);
} finally {
formatter.close();
}
return sb.toString();
}
public static long getMacAddressAsLong(InetAddress address) {
long macAddressAsLong = 0;
try {
NetworkInterface ni = NetworkInterface.getByInetAddress(address);
byte[] mac = ni.getHardwareAddress();
for (int i = 0; i < mac.length; i++) {
macAddressAsLong |= ((long)(mac[i] & 0xff) << (mac.length - i - 1) * 8);
}
} catch (SocketException e) {
s_logger.error("SocketException when trying to retrieve MAC address", e);
}
return macAddressAsLong;
}
public static boolean ipRangesOverlap(String startIp1, String endIp1, String startIp2, String endIp2) {
long startIp1Long = ip2Long(startIp1);
long endIp1Long = startIp1Long;
if (endIp1 != null) {
endIp1Long = ip2Long(endIp1);
}
long startIp2Long = ip2Long(startIp2);
long endIp2Long = startIp2Long;
if (endIp2 != null) {
endIp2Long = ip2Long(endIp2);
}
if (startIp1Long == startIp2Long || startIp1Long == endIp2Long || endIp1Long == startIp2Long || endIp1Long == endIp2Long) {
return true;
} else if (startIp1Long > startIp2Long && startIp1Long < endIp2Long) {
return true;
} else if (endIp1Long > startIp2Long && endIp1Long < endIp2Long) {
return true;
} else if (startIp2Long > startIp1Long && startIp2Long < endIp1Long) {
return true;
} else if (endIp2Long > startIp1Long && endIp2Long < endIp1Long) {
return true;
} else {
return false;
}
}
public static long ip2Long(final String ip) {
String[] tokens = ip.split("[.]");
assert (tokens.length == 4);
long result = 0;
for (int i = 0; i < tokens.length; i++) {
try {
result = (result << 8) | Integer.parseInt(tokens[i]);
} catch (NumberFormatException e) {
throw new RuntimeException("Incorrect number", e);
}
}
return result;
}
public static String long2Ip(final long ip) {
final StringBuilder result = new StringBuilder(15);
result.append((ip >> 24 & 0xff)).append(".");
result.append((ip >> 16 & 0xff)).append(".");
result.append((ip >> 8 & 0xff)).append(".");
result.append(ip & 0xff);
return result.toString();
}
public static long mac2Long(final String macAddress) {
final String[] tokens = macAddress.split(":");
assert (tokens.length == 6);
long result = 0;
for (int i = 0; i < tokens.length; i++) {
result = result << 8;
result |= Integer.parseInt(tokens[i], 16);
}
return result;
}
public static String[] getNicParams(String nicName) {
try {
NetworkInterface nic = NetworkInterface.getByName(nicName);
return getNetworkParams(nic);
} catch (SocketException e) {
return null;
}
}
public static String[] getNetworkParams(NetworkInterface nic) {
List<InterfaceAddress> addrs = nic.getInterfaceAddresses();
if (addrs == null || addrs.size() == 0) {
return null;
}
InterfaceAddress addr = null;
for (InterfaceAddress iaddr : addrs) {
InetAddress inet = iaddr.getAddress();
if (!inet.isLinkLocalAddress() && !inet.isLoopbackAddress() && !inet.isMulticastAddress() && inet.getAddress().length == 4) {
addr = iaddr;
break;
}
}
if (addr == null) {
return null;
}
String[] result = new String[3];
result[0] = addr.getAddress().getHostAddress();
try {
byte[] mac = nic.getHardwareAddress();
result[1] = byte2Mac(mac);
} catch (SocketException e) {
s_logger.debug("Caught exception when trying to get the mac address ", e);
}
result[2] = prefix2Netmask(addr.getNetworkPrefixLength());
return result;
}
public static String prefix2Netmask(short prefix) {
long addr = 0;
for (int i = 0; i < prefix; i++) {
addr = addr | (1 << (31 - i));
}
return long2Ip(addr);
}
public static String byte2Mac(byte[] m) {
StringBuilder result = new StringBuilder(17);
Formatter formatter = new Formatter(result);
formatter.format("%02x:%02x:%02x:%02x:%02x:%02x", m[0], m[1], m[2], m[3], m[4], m[5]);
formatter.close();
return result.toString();
}
public static String long2Mac(final long macAddress) {
final StringBuilder result = new StringBuilder(17);
try (Formatter formatter = new Formatter(result)) {
formatter.format("%02x:%02x:%02x:%02x:%02x:%02x",
(macAddress >> 40) & 0xff, (macAddress >> 32) & 0xff,
(macAddress >> 24) & 0xff, (macAddress >> 16) & 0xff,
(macAddress >> 8) & 0xff, (macAddress & 0xff));
}
return result.toString();
}
public static boolean isValidPrivateIp(String ipAddress, String guestIPAddress) {
InetAddress privIp = parseIpAddress(ipAddress);
if (privIp == null) {
return false;
}
if (!privIp.isSiteLocalAddress()) {
return false;
}
String firstGuestOctet = "10";
if (guestIPAddress != null && !guestIPAddress.isEmpty()) {
String[] guestIPList = guestIPAddress.split("\\.");
firstGuestOctet = guestIPList[0];
}
String[] ipList = ipAddress.split("\\.");
if (!ipList[0].equals(firstGuestOctet)) {
return false;
}
return true;
}
public static boolean isSiteLocalAddress(String ipAddress) {
if (ipAddress == null) {
return false;
} else {
InetAddress ip = parseIpAddress(ipAddress);
if(ip != null) {
return ip.isSiteLocalAddress();
}
return false;
}
}
public static boolean validIpRange(String startIP, String endIP) {
if (endIP == null || endIP.isEmpty()) {
return true;
}
long startIPLong = NetUtils.ip2Long(startIP);
long endIPLong = NetUtils.ip2Long(endIP);
return (startIPLong <= endIPLong);
}
public static boolean isValidIp(final String ip) {
InetAddressValidator validator = InetAddressValidator.getInstance();
return validator.isValidInet4Address(ip);
}
public static boolean isValidCIDR(final String cidr) {
if (cidr == null || cidr.isEmpty()) {
return false;
}
String[] cidrPair = cidr.split("\\/");
if (cidrPair.length != 2) {
return false;
}
String cidrAddress = cidrPair[0];
String cidrSize = cidrPair[1];
if (!isValidIp(cidrAddress)) {
return false;
}
int cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (Exception e) {
return false;
}
if (cidrSizeNum < 0 || cidrSizeNum > 32) {
return false;
}
return true;
}
public static boolean isValidNetmask(String netmask) {
if (!isValidIp(netmask)) {
return false;
}
long ip = ip2Long(netmask);
int count = 0;
boolean finished = false;
for (int i = 31; i >= 0; i--) {
if (((ip >> i) & 0x1) == 0) {
finished = true;
} else {
if (finished) {
return false;
}
count += 1;
}
}
if (count == 0) {
return false;
}
return true;
}
private static InetAddress parseIpAddress(String address) {
StringTokenizer st = new StringTokenizer(address, ".");
byte[] bytes = new byte[4];
if (st.countTokens() == 4) {
try {
for (int i = 0; i < 4; i++) {
bytes[i] = (byte)Integer.parseInt(st.nextToken());
}
return InetAddress.getByAddress(address, bytes);
} catch (NumberFormatException nfe) {
return null;
} catch (UnknownHostException uhe) {
return null;
}
}
return null;
}
public static String getCidrFromGatewayAndNetmask(String gatewayStr, String netmaskStr) {
long netmask = ip2Long(netmaskStr);
long gateway = ip2Long(gatewayStr);
long firstPart = gateway & netmask;
long size = getCidrSize(netmaskStr);
return long2Ip(firstPart) + "/" + size;
}
public static String[] getIpRangeFromCidr(String cidr, long size) {
assert (size < 32) : "You do know this is not for ipv6 right? Keep it smaller than 32 but you have " + size;
String[] result = new String[2];
long ip = ip2Long(cidr);
long startNetMask = ip2Long(getCidrNetmask(size));
long start = (ip & startNetMask) + 1;
long end = start;
end = end >> (32 - size);
end++;
end = (end << (32 - size)) - 2;
result[0] = long2Ip(start);
result[1] = long2Ip(end);
return result;
}
public static Set<Long> getAllIpsFromCidr(String cidr, long size, Set<Long> usedIps) {
assert (size < 32) : "You do know this is not for ipv6 right? Keep it smaller than 32 but you have " + size;
Set<Long> result = new TreeSet<Long>();
long ip = ip2Long(cidr);
long startNetMask = ip2Long(getCidrNetmask(size));
long start = (ip & startNetMask) + 1;
long end = start;
end = end >> (32 - size);
end++;
end = (end << (32 - size)) - 2;
int maxIps = 255; // get 255 ips as maximum
while (start <= end && maxIps > 0) {
if (!usedIps.contains(start)) {
result.add(start);
maxIps--;
}
start++;
}
return result;
}
/**
* Given a cidr, this method returns an ip address within the range but
* is not in the avoid list.
*
* @param startIp ip that the cidr starts with
* @param size size of the cidr
* @param avoid set of ips to avoid
* @return ip that is within the cidr range but not in the avoid set. -1 if unable to find one.
*/
public static long getRandomIpFromCidr(String startIp, int size, SortedSet<Long> avoid) {
return getRandomIpFromCidr(ip2Long(startIp), size, avoid);
}
/**
* Given a cidr, this method returns an ip address within the range but
* is not in the avoid list.
* Note: the gateway address has to be specified in the avoid list
*
* @param cidr ip that the cidr starts with
* @param size size of the cidr
* @param avoid set of ips to avoid
* @return ip that is within the cidr range but not in the avoid set. -1 if unable to find one.
*/
public static long getRandomIpFromCidr(long cidr, int size, SortedSet<Long> avoid) {
assert (size < 32) : "You do know this is not for ipv6 right? Keep it smaller than 32 but you have " + size;
long startNetMask = ip2Long(getCidrNetmask(size));
long startIp = (cidr & startNetMask) + 1; //exclude the first ip since it isnt valid, e.g., 192.168.10.0
int range = 1 << (32 - size); //e.g., /24 = 2^8 = 256
range = range - 1; //exclude end of the range since that is the broadcast address, e.g., 192.168.10.255
if (avoid.size() >= range) {
return -1;
}
//Reduce the range by the size of the avoid set
//e.g., cidr = 192.168.10.0, size = /24, avoid = 192.168.10.1, 192.168.10.20, 192.168.10.254
// range = 2^8 - 1 - 3 = 252
range = range - avoid.size();
int next = s_rand.nextInt(range); //note: nextInt excludes last value
long ip = startIp + next;
for (Long avoidable : avoid) {
if (ip >= avoidable) {
ip++;
} else {
break;
}
}
return ip;
}
public static String getIpRangeStartIpFromCidr(String cidr, long size) {
long ip = ip2Long(cidr);
long startNetMask = ip2Long(getCidrNetmask(size));
long start = (ip & startNetMask) + 1;
return long2Ip(start);
}
public static String getIpRangeEndIpFromCidr(String cidr, long size) {
long ip = ip2Long(cidr);
long startNetMask = ip2Long(getCidrNetmask(size));
long start = (ip & startNetMask) + 1;
long end = start;
end = end >> (32 - size);
end++;
end = (end << (32 - size)) - 2;
return long2Ip(end);
}
public static boolean sameSubnet(final String ip1, final String ip2, final String netmask) {
if (ip1 == null || ip1.isEmpty() || ip2 == null || ip2.isEmpty()) {
return true;
}
String subnet1 = NetUtils.getSubNet(ip1, netmask);
String subnet2 = NetUtils.getSubNet(ip2, netmask);
return (subnet1.equals(subnet2));
}
public static boolean sameSubnetCIDR(final String ip1, final String ip2, final long cidrSize) {
if (ip1 == null || ip1.isEmpty() || ip2 == null || ip2.isEmpty()) {
return true;
}
String subnet1 = NetUtils.getCidrSubNet(ip1, cidrSize);
String subnet2 = NetUtils.getCidrSubNet(ip2, cidrSize);
return (subnet1.equals(subnet2));
}
public static String getSubNet(String ip, String netmask) {
long ipAddr = ip2Long(ip);
long subnet = ip2Long(netmask);
long result = ipAddr & subnet;
return long2Ip(result);
}
public static String getCidrSubNet(String ip, long cidrSize) {
long numericNetmask = (0xffffffff >> (32 - cidrSize)) << (32 - cidrSize);
String netmask = NetUtils.long2Ip(numericNetmask);
return getSubNet(ip, netmask);
}
public static String ipAndNetMaskToCidr(String ip, String netmask) {
if (!isValidIp(ip)) {
return null;
}
if (!isValidNetmask(netmask)) {
return null;
}
long ipAddr = ip2Long(ip);
long subnet = ip2Long(netmask);
long result = ipAddr & subnet;
int bits = (subnet == 0) ? 0 : 1;
long subnet2 = subnet;
while ((subnet2 = (subnet2 >> 1) & subnet) != 0) {
bits++;
}
return long2Ip(result) + "/" + Integer.toString(bits);
}
public static String[] ipAndNetMaskToRange(String ip, String netmask) {
long ipAddr = ip2Long(ip);
long subnet = ip2Long(netmask);
long start = (ipAddr & subnet) + 1;
long end = start;
int bits = (subnet == 0) ? 0 : 1;
while ((subnet = (subnet >> 1) & subnet) != 0) {
bits++;
}
end = end >> (32 - bits);
end++;
end = (end << (32 - bits)) - 2;
return new String[] {long2Ip(start), long2Ip(end)};
}
public static Pair<String, Integer> getCidr(String cidr) {
String[] tokens = cidr.split("/");
return new Pair<String, Integer>(tokens[0], Integer.parseInt(tokens[1]));
}
public static enum SupersetOrSubset {
isSuperset, isSubset, neitherSubetNorSuperset, sameSubnet, errorInCidrFormat
}
public static SupersetOrSubset isNetowrkASubsetOrSupersetOfNetworkB(String cidrA, String cidrB) {
Long[] cidrALong = cidrToLong(cidrA);
Long[] cidrBLong = cidrToLong(cidrB);
long shift = 0;
if (cidrALong == null || cidrBLong == null) {
//implies error in the cidr format
return SupersetOrSubset.errorInCidrFormat;
}
if (cidrALong[1] >= cidrBLong[1]) {
shift = 32 - cidrBLong[1];
} else {
shift = 32 - cidrALong[1];
}
long result = (cidrALong[0] >> shift) - (cidrBLong[0] >> shift);
if (result == 0) {
if (cidrALong[1] < cidrBLong[1]) {
//this implies cidrA is super set of cidrB
return SupersetOrSubset.isSuperset;
} else if (cidrALong[1].equals(cidrBLong[1])) {
//this implies both the cidrs are equal
return SupersetOrSubset.sameSubnet;
}
// implies cidrA is subset of cidrB
return SupersetOrSubset.isSubset;
}
//this implies no overlap.
return SupersetOrSubset.neitherSubetNorSuperset;
}
public static boolean isNetworkAWithinNetworkB(String cidrA, String cidrB) {
Long[] cidrALong = cidrToLong(cidrA);
Long[] cidrBLong = cidrToLong(cidrB);
if (cidrALong == null || cidrBLong == null) {
return false;
}
long shift = 32 - cidrBLong[1];
return ((cidrALong[0] >> shift) == (cidrBLong[0] >> shift));
}
public static Long[] cidrToLong(String cidr) {
if (cidr == null || cidr.isEmpty()) {
return null;
}
String[] cidrPair = cidr.split("\\/");
if (cidrPair.length != 2) {
return null;
}
String cidrAddress = cidrPair[0];
String cidrSize = cidrPair[1];
if (!isValidIp(cidrAddress)) {
return null;
}
int cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (Exception e) {
return null;
}
long numericNetmask = (0xffffffff >> (32 - cidrSizeNum)) << (32 - cidrSizeNum);
long ipAddr = ip2Long(cidrAddress);
Long[] cidrlong = {ipAddr & numericNetmask, (long)cidrSizeNum};
return cidrlong;
}
public static String getCidrSubNet(String cidr) {
if (cidr == null || cidr.isEmpty()) {
return null;
}
String[] cidrPair = cidr.split("\\/");
if (cidrPair.length != 2) {
return null;
}
String cidrAddress = cidrPair[0];
String cidrSize = cidrPair[1];
if (!isValidIp(cidrAddress)) {
return null;
}
int cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (Exception e) {
return null;
}
long numericNetmask = (0xffffffff >> (32 - cidrSizeNum)) << (32 - cidrSizeNum);
String netmask = NetUtils.long2Ip(numericNetmask);
return getSubNet(cidrAddress, netmask);
}
public static String getCidrNetmask(long cidrSize) {
long numericNetmask = (0xffffffff >> (32 - cidrSize)) << (32 - cidrSize);
return long2Ip(numericNetmask);
}
public static String getCidrNetmask(String cidr) {
String[] cidrPair = cidr.split("\\/");
long guestCidrSize = Long.parseLong(cidrPair[1]);
return getCidrNetmask(guestCidrSize);
}
public static String cidr2Netmask(String cidr) {
String[] tokens = cidr.split("\\/");
return getCidrNetmask(Integer.parseInt(tokens[1]));
}
public static long getCidrSize(String netmask) {
long ip = ip2Long(netmask);
int count = 0;
for (int i = 0; i < 32; i++) {
if (((ip >> i) & 0x1) == 0) {
count++;
} else {
break;
}
}
return 32 - count;
}
public static boolean isValidPort(String p) {
try {
int port = Integer.parseInt(p);
return !(port > 65535 || port < 1);
} catch (NumberFormatException e) {
return false;
}
}
public static boolean isValidPort(int p) {
return !(p > 65535 || p < 1);
}
public static boolean isValidLBPort(String p) {
try {
int port = Integer.parseInt(p);
return !(port > 65535 || port < 1);
} catch (NumberFormatException e) {
return false;
}
}
public static boolean isValidProto(String p) {
String proto = p.toLowerCase();
return (proto.equals(TCP_PROTO) || proto.equals(UDP_PROTO) || proto.equals(ICMP_PROTO));
}
public static boolean isValidSecurityGroupProto(String p) {
String proto = p.toLowerCase();
return (proto.equals(TCP_PROTO) || proto.equals(UDP_PROTO) || proto.equals(ICMP_PROTO) || proto.equals(ALL_PROTO));
}
public static boolean isValidAlgorithm(String p) {
String algo = p.toLowerCase();
return (algo.equals("roundrobin") || algo.equals("leastconn") || algo.equals("source"));
}
public static boolean isValidAutoScaleAction(String p) {
String action = p.toLowerCase();
return (action.equals("scaleup") || action.equals("scaledown"));
}
public static String getLinkLocalNetMask() {
return "255.255.0.0";
}
public static String getLinkLocalGateway() {
return "169.254.0.1";
}
public static String getLinkLocalCIDR() {
return "169.254.0.0/16";
}
public static String[] getLinkLocalIPRange(int size) {
if (size > 16 || size <= 0) {
return null;
}
/* reserve gateway */
String[] range = getIpRangeFromCidr(getLinkLocalGateway(), 32 - size);
if (range[0].equalsIgnoreCase(getLinkLocalGateway())) {
/* remove the gateway */
long ip = ip2Long(range[0]);
ip += 1;
range[0] = long2Ip(ip);
}
return range;
}
public static String getLinkLocalIpEnd() {
String[] cidrPair = getLinkLocalCIDR().split("\\/");
String cidr = cidrPair[0];