mappingservice/lisp-proto/src/main/java/org/opendaylight/lispflowmapping/lisp/util/MaskUtil.java

   1 /*
   2  * Copyright (c) 2014 Contextream, Inc. and others.  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 package org.opendaylight.lispflowmapping.lisp.util;
   9
  10 import java.net.Inet4Address;
  11 import java.net.Inet6Address;
  12 import java.net.InetAddress;
  13 import java.net.UnknownHostException;
  14 import java.nio.ByteBuffer;
  15
  16 import org.apache.commons.lang3.exception.ExceptionUtils;
  17 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.IpPrefix;
  18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.SimpleAddress;
  19 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.Address;
  20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.InstanceId;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv4;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv4Prefix;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv6;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv6Prefix;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.SourceDestKey;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.eid.container.Eid;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public final class MaskUtil {
  31     private static final Logger LOG = LoggerFactory.getLogger(MaskUtil.class);
  32     private static final short IPV4_MAX_MASK = 32;
  33     private static final short IPV6_MAX_MASK = 128;
  34
  35     // Utility class, should not be instantiated
  36     private MaskUtil() {
  37     }
  38
  39     public static boolean isMaskable(Address address) {
  40         if (address instanceof Ipv4Prefix || address instanceof Ipv6Prefix || address instanceof SourceDestKey) {
  41             return true;
  42         } else if (address instanceof InstanceId) {
  43             return isMaskable(((InstanceId)address).getInstanceId().getAddress());
  44         }
  45         return false;
  46     }
  47
  48     public static boolean isMaskable(SimpleAddress address) {
  49         if (address.getIpPrefix() != null) {
  50             return true;
  51         }
  52         return false;
  53     }
  54
  55     public static Eid normalize(Eid eid, short mask) {
  56         Address address = eid.getAddress();
  57         try {
  58             if (address instanceof Ipv4Prefix) {
  59                 String[] v4prefix = String.valueOf(((Ipv4Prefix)address).getIpv4Prefix().getValue()).split("/");
  60                 InetAddress normalized = normalizeIP(Inet4Address.getByName(v4prefix[0]), mask);
  61                 return LispAddressUtil.asIpv4PrefixEid(eid, (Inet4Address)normalized, mask);
  62             } else if (address instanceof Ipv6Prefix) {
  63                 String[] v6prefix = String.valueOf(((Ipv6Prefix)address).getIpv6Prefix().getValue()).split("/");
  64                 InetAddress normalized = normalizeIP(Inet6Address.getByName(v6prefix[0]), mask);
  65                 return LispAddressUtil.asIpv6PrefixEid(eid, (Inet6Address)normalized, mask);
  66             } else if (address instanceof InstanceId) {
  67                 // TODO - not absolutely necessary, but should be implemented
  68                 return eid;
  69             }
  70         } catch (UnknownHostException e) {
  71             LOG.trace("Failed to normalize eid {} with mask {}: {}", eid, mask, ExceptionUtils.getStackTrace(e));
  72         }
  73         return eid;
  74     }
  75
  76     public static Eid normalize(Eid eid) {
  77         Address address = eid.getAddress();
  78         try {
  79             if (address instanceof Ipv4Prefix) {
  80                 String[] v4prefix = String.valueOf(((Ipv4Prefix)address).getIpv4Prefix().getValue()).split("/");
  81                 short mask = Short.parseShort(v4prefix[1]);
  82                 InetAddress normalized = normalizeIP(Inet4Address.getByName(v4prefix[0]), mask);
  83                 return LispAddressUtil.asIpv4PrefixEid(eid, (Inet4Address)normalized, mask);
  84             } else if (address instanceof Ipv6Prefix) {
  85                 String[] v6prefix = String.valueOf(((Ipv6Prefix)address).getIpv6Prefix().getValue()).split("/");
  86                 short mask = Short.parseShort(v6prefix[1]);
  87                 InetAddress normalized = normalizeIP(Inet6Address.getByName(v6prefix[0]), mask);
  88                 return LispAddressUtil.asIpv6PrefixEid(eid, (Inet6Address)normalized, mask);
  89             } else if (address instanceof InstanceId) {
  90                 // TODO - not absolutely necessary, but should be implemented
  91                 return eid;
  92             }
  93         } catch (UnknownHostException e) {
  94             LOG.trace("Failed to normalize eid {}: {}", eid, ExceptionUtils.getStackTrace(e));
  95         }
  96         return eid;
  97     }
  98
  99     private static InetAddress normalizeIP(InetAddress address, int mask) throws UnknownHostException {
 100         ByteBuffer byteRepresentation = ByteBuffer.wrap(address.getAddress());
 101         byte b = (byte) 0xff;
 102         for (int i = 0; i < byteRepresentation.array().length; i++) {
 103             if (mask >= 8) {
 104                 byteRepresentation.put(i, (byte) (b & byteRepresentation.get(i)));
 105             } else if (mask > 0) {
 106                 byteRepresentation.put(i, (byte) ((byte) (b << (8 - mask)) & byteRepresentation.get(i)));
 107             } else {
 108                 byteRepresentation.put(i, (byte) (0 & byteRepresentation.get(i)));
 109             }
 110
 111             mask -= 8;
 112         }
 113         return InetAddress.getByAddress(byteRepresentation.array());
 114     }
 115
 116     public static int getMaxMask(Address address) {
 117         if (address instanceof Ipv4 || address instanceof Ipv4Prefix) {
 118             return IPV4_MAX_MASK;
 119         } else if (address instanceof Ipv6 || address instanceof Ipv6Prefix) {
 120             return IPV6_MAX_MASK;
 121         } else {
 122             return -1;
 123         }
 124     }
 125
 126     public static short getMaskForAddress(SimpleAddress address) {
 127         if (address.getIpPrefix() == null) {
 128             return -1;
 129         }
 130         return getMaskForIpPrefix(address.getIpPrefix());
 131     }
 132
 133     public static short getMaskForIpPrefix(IpPrefix prefix) {
 134         return Short.parseShort(String.valueOf(prefix.getValue()).split("/")[1]);
 135     }
 136
 137     public static String getAddressStringForIpPrefix(IpPrefix prefix) {
 138         return String.valueOf(prefix.getValue()).split("/")[0];
 139     }
 140
 141     public static String getAddressStringForIpv4Prefix(Ipv4Prefix prefix) {
 142         return String.valueOf(prefix.getIpv4Prefix().getValue()).split("/")[0];
 143     }
 144
 145     public static String getAddressStringForIpv6Prefix(Ipv6Prefix prefix) {
 146         return String.valueOf(prefix.getIpv6Prefix().getValue()).split("/")[0];
 147     }
 148
 149     public static short getMaskForAddress(Address address) {
 150         if (address instanceof Ipv4) {
 151             return IPV4_MAX_MASK;
 152         } else if (address instanceof Ipv6) {
 153             return IPV6_MAX_MASK;
 154         } else if (address instanceof Ipv4Prefix) {
 155             String[] prefix = String.valueOf(((Ipv4Prefix)address).getIpv4Prefix().getValue()).split("/");  // TODO use something more efficient
 156             return Short.parseShort(prefix[1]);
 157         } else if (address instanceof Ipv6Prefix) {
 158             String[] prefix = String.valueOf(((Ipv6Prefix)address).getIpv6Prefix().getValue()).split("/");  // TODO use something more efficient
 159             return Short.parseShort(prefix[1]);
 160         } else if (address instanceof InstanceId) {
 161             return getMaskForAddress(((InstanceId)address).getInstanceId().getAddress());
 162         }
 163         return -1;
 164     }
 165 }