renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/lisp/util/IpAddressUtil.java

   1 /*
   2  * Copyright (c) 2017 Cisco Systems. All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.lisp.util;
  10
  11 import com.google.common.net.InetAddresses;
  12
  13 import java.net.InetAddress;
  14 import java.net.UnknownHostException;
  15
  16 import org.apache.commons.lang3.tuple.ImmutablePair;
  17 import org.apache.commons.lang3.tuple.Pair;
  18 import org.apache.commons.net.util.SubnetUtils;
  19 import org.opendaylight.groupbasedpolicy.renderer.vpp.lisp.exception.LispArgumentException;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 public class IpAddressUtil {
  26     private static final Logger LOG = LoggerFactory.getLogger(IpAddressUtil.class);
  27
  28     static boolean isMetadataIp(Ipv4Address ipv4Address) {
  29         return ipv4Address.getValue().equals(Constants.METADATA_IP);
  30     }
  31
  32     public static Pair<Ipv4Address, Ipv4Address> getStartAndEndIp(Ipv4Prefix ipv4Prefix) {
  33         SubnetUtils subnetUtils = new SubnetUtils(ipv4Prefix.getValue());
  34         SubnetUtils.SubnetInfo prefixSubnetInfo = subnetUtils.getInfo();
  35         Ipv4Address lowIp = new Ipv4Address(prefixSubnetInfo.getLowAddress());
  36         Ipv4Address highIp = new Ipv4Address(prefixSubnetInfo.getHighAddress());
  37         return new ImmutablePair<>(lowIp, highIp);
  38     }
  39
  40     public static Pair<Ipv4Prefix, Ipv4Prefix> getSmallerSubnet(Ipv4Prefix ipv4Prefix) throws LispArgumentException {
  41         String cidrNotion = ipv4Prefix.getValue();
  42
  43         SubnetUtils subnetUtils = new SubnetUtils(cidrNotion);
  44         String firstSubnet;
  45         String secondSubnet;
  46         int maskLen = Integer.valueOf(cidrNotion.split("/")[1]) + 1;
  47
  48         if (maskLen > 32) {
  49             return new ImmutablePair<>(ipv4Prefix, ipv4Prefix);
  50         }
  51
  52         SubnetUtils.SubnetInfo subnetInfo = subnetUtils.getInfo();
  53         try {
  54             int lowValue = InetAddresses.coerceToInteger(InetAddress.getByName(subnetInfo.getNetworkAddress()));
  55             int highValue = InetAddresses.coerceToInteger(InetAddress.getByName(subnetInfo.getHighAddress())) + 1;
  56             InetAddress middleAddress = InetAddresses.fromInteger(lowValue + (highValue - lowValue + 1) / 2);
  57             String firstAddress = subnetInfo.getNetworkAddress();
  58             String secondAddress = middleAddress.getHostAddress();
  59             firstSubnet = firstAddress + "/" + maskLen;
  60             secondSubnet = secondAddress + "/" + maskLen;
  61         } catch (UnknownHostException e) {
  62             LOG.warn("Failed to translate IP address " + cidrNotion+ " to smaller subnet");
  63             throw new LispArgumentException("Invalid argument for subnet " + cidrNotion);
  64         }
  65         return new ImmutablePair<>(new Ipv4Prefix(firstSubnet), new Ipv4Prefix(secondSubnet));
  66     }
  67
  68     public static Ipv4Prefix toIpV4Prefix(Ipv4Address ipv4Address) {
  69         return new Ipv4Prefix(ipv4Address.getValue() + "/32");
  70     }
  71
  72     static boolean ipInRange(Ipv4Address ip, String startIpStr, String endIpStr) {
  73         String ipStr = ip.getValue();
  74
  75         int startLim = InetAddresses.coerceToInteger(InetAddresses.forString(startIpStr));
  76         int endLim = InetAddresses.coerceToInteger(InetAddresses.forString(endIpStr));
  77         int ipNum = InetAddresses.coerceToInteger(InetAddresses.forString(ipStr));
  78
  79         long startUnsigned = Integer.toUnsignedLong(startLim);
  80         long endUnsigned = Integer.toUnsignedLong(endLim);
  81         long ipNumUnsigned = Integer.toUnsignedLong(ipNum);
  82
  83         return (startUnsigned <= ipNumUnsigned) && (ipNumUnsigned <= endUnsigned);
  84     }
  85
  86     static String startIpOfSubnet(String cidrNotion) {
  87         return new SubnetUtils(cidrNotion).getInfo().getLowAddress();
  88     }
  89
  90     static String endIpOfSubnet(String cidrNotion) {
  91         return new SubnetUtils(cidrNotion).getInfo().getHighAddress();
  92     }
  93
  94     static int maskLen(String cidrNotion) {
  95         return Integer.valueOf(cidrNotion.split("/")[1]);
  96     }
  97 }