applications/statistics-manager/src/main/java/org/opendaylight/openflowplugin/applications/statistics/manager/impl/helper/MatchComparatorHelper.java

   1 /**
   2  * Copyright (c) 2015 Cisco Systems, 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.openflowplugin.applications.statistics.manager.impl.helper;
   9
  10 import com.google.common.net.InetAddresses;
  11 import java.math.BigInteger;
  12 import java.net.Inet4Address;
  13 import java.net.InetAddress;
  14 import java.net.UnknownHostException;
  15 import java.util.ArrayList;
  16 import java.util.Arrays;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19 import com.google.common.annotations.VisibleForTesting;
  20 import com.google.common.primitives.UnsignedBytes;
  21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
  22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Prefix;
  23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv6Prefix;
  24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
  25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.DottedQuad;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.MacAddressFilter;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.EthernetMatch;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.Layer3Match;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv4Match;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv6Match;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.model.match.types.rev131026.match.layer._3.match.Ipv4MatchArbitraryBitMask;
  32
  33 /**
  34  * @author joe
  35  * @author sai.marapareddy@gmail.com
  36  *
  37  */
  38 public class MatchComparatorHelper {
  39
  40     private static final Logger LOG = LoggerFactory.getLogger(MatchComparatorHelper.class);
  41     private static final int DEFAULT_SUBNET = 32;
  42     private static final int IPV4_MASK_LENGTH = 32;
  43     private static final int SHIFT_OCTET_1 = 24;
  44     private static final int SHIFT_OCTET_2 = 16;
  45     private static final int SHIFT_OCTET_3 = 8;
  46     private static final int SHIFT_OCTET_4 = 0;
  47     private static final int POSITION_OCTET_1 = 0;
  48     private static final int POSITION_OCTET_2 = 1;
  49     private static final int POSITION_OCTET_3 = 2;
  50     private static final int POSITION_OCTET_4 = 3;
  51     private static final String DEFAULT_ARBITRARY_BIT_MASK = "255.255.255.255";
  52     private static final String PREFIX_SEPARATOR = "/";
  53     private static final int IPV4_ADDRESS_LENGTH = 32;
  54
  55     /*
  56      * Custom EthernetMatch is required because mac address string provided by user in EthernetMatch can be in any case
  57      * (upper or lower or mix). Ethernet Match which controller receives from switch is always an upper case string.
  58      * Default EthernetMatch equals doesn't use equalsIgnoreCase() and hence it fails. E.g User provided mac address
  59      * string in flow match is aa:bb:cc:dd:ee:ff and when controller fetch statistic data, openflow driver library
  60      * returns AA:BB:CC:DD:EE:FF and default eqauls fails here.
  61      */
  62     @VisibleForTesting
  63     static boolean ethernetMatchEquals(final EthernetMatch statsEthernetMatch, final EthernetMatch storedEthernetMatch) {
  64         boolean verdict = true;
  65         final Boolean checkNullValues = checkNullValues(statsEthernetMatch, storedEthernetMatch);
  66         if (checkNullValues != null) {
  67             verdict = checkNullValues;
  68         } else {
  69             verdict = ethernetMatchFieldsEquals(statsEthernetMatch.getEthernetSource(),
  70                     storedEthernetMatch.getEthernetSource());
  71             if (verdict) {
  72                 verdict = ethernetMatchFieldsEquals(statsEthernetMatch.getEthernetDestination(),
  73                         storedEthernetMatch.getEthernetDestination());
  74             }
  75             if (verdict) {
  76                 if (statsEthernetMatch.getEthernetType() == null) {
  77                     if (storedEthernetMatch.getEthernetType() != null) {
  78                         verdict = false;
  79                     }
  80                 } else {
  81                     verdict = statsEthernetMatch.getEthernetType().equals(storedEthernetMatch.getEthernetType());
  82                 }
  83             }
  84         }
  85         return verdict;
  86     }
  87
  88     static boolean ethernetMatchFieldsEquals(final MacAddressFilter statsEthernetMatchFields,
  89             final MacAddressFilter storedEthernetMatchFields) {
  90         boolean verdict = true;
  91         final Boolean checkNullValues = checkNullValues(statsEthernetMatchFields, storedEthernetMatchFields);
  92         if (checkNullValues != null) {
  93             verdict = checkNullValues;
  94         } else {
  95             verdict = macAddressEquals(statsEthernetMatchFields.getAddress(), storedEthernetMatchFields.getAddress());
  96             if (verdict) {
  97                 verdict = macAddressEquals(statsEthernetMatchFields.getMask(), storedEthernetMatchFields.getMask());
  98             }
  99         }
 100         return verdict;
 101     }
 102
 103     static boolean macAddressEquals(final MacAddress statsMacAddress, final MacAddress storedMacAddress) {
 104         boolean verdict = true;
 105         final Boolean checkNullValues = checkNullValues(statsMacAddress, storedMacAddress);
 106         if (checkNullValues != null) {
 107             verdict = checkNullValues;
 108         } else {
 109             verdict = statsMacAddress.getValue().equalsIgnoreCase(storedMacAddress.getValue());
 110         }
 111         return verdict;
 112     }
 113
 114     @VisibleForTesting
 115     static boolean layer3MatchEquals(final Layer3Match statsLayer3Match, final Layer3Match storedLayer3Match) {
 116         boolean verdict = true;
 117         if (statsLayer3Match instanceof Ipv4Match && storedLayer3Match instanceof Ipv4Match) {
 118             final Ipv4Match statsIpv4Match = (Ipv4Match) statsLayer3Match;
 119             final Ipv4Match storedIpv4Match = (Ipv4Match) storedLayer3Match;
 120             verdict = MatchComparatorHelper.compareIpv4PrefixNullSafe(storedIpv4Match.getIpv4Destination(),
 121                     statsIpv4Match.getIpv4Destination());
 122             if (verdict) {
 123                 verdict = MatchComparatorHelper.compareIpv4PrefixNullSafe(statsIpv4Match.getIpv4Source(),
 124                         storedIpv4Match.getIpv4Source());
 125             }
 126         } else if(statsLayer3Match instanceof Ipv6Match && storedLayer3Match instanceof Ipv6Match) {
 127             final Ipv6Match statsIpv6Match = (Ipv6Match) statsLayer3Match;
 128             final Ipv6Match storedIpv6Match = (Ipv6Match) storedLayer3Match;
 129             verdict = MatchComparatorHelper.compareIpv6PrefixNullSafe(storedIpv6Match.getIpv6Destination(),
 130                     statsIpv6Match.getIpv6Destination());
 131             if (verdict) {
 132                 verdict = MatchComparatorHelper.compareIpv6PrefixNullSafe(statsIpv6Match.getIpv6Source(),
 133                         storedIpv6Match.getIpv6Source());
 134             }
 135         } else if(statsLayer3Match instanceof  Ipv4MatchArbitraryBitMask && storedLayer3Match instanceof Ipv4MatchArbitraryBitMask) {
 136             // At this moment storedIpv4MatchArbitraryBitMask & statsIpv4MatchArbitraryBitMask will always have non null arbitrary masks.
 137             // In case of no / null arbitrary mask, statsLayer3Match will be an instance of Ipv4Match.
 138             // Eg:- stats -> 1.0.1.0/255.0.255.0  stored -> 1.1.1.0/255.0.255.0
 139             final Ipv4MatchArbitraryBitMask statsIpv4MatchArbitraryBitMask= (Ipv4MatchArbitraryBitMask) statsLayer3Match;
 140             final Ipv4MatchArbitraryBitMask storedIpv4MatchArbitraryBitMask = (Ipv4MatchArbitraryBitMask) storedLayer3Match;
 141             if((storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask() != null |
 142                     storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask() != null)) {
 143                 if(storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask() != null) {
 144                         String storedIpAddress = extractIpv4Address(storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask(),
 145                                 storedIpv4MatchArbitraryBitMask.getIpv4DestinationArbitraryBitmask());
 146                         if(MatchComparatorHelper.compareStringNullSafe(storedIpv4MatchArbitraryBitMask.getIpv4DestinationArbitraryBitmask().getValue(),
 147                                 statsIpv4MatchArbitraryBitMask.getIpv4DestinationArbitraryBitmask().getValue())) {
 148                             verdict = MatchComparatorHelper.compareStringNullSafe(storedIpAddress,
 149                                     statsIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask().getValue());
 150                         }
 151                         else {
 152                             verdict = false;
 153                             return verdict;
 154                         }
 155                 }
 156                 if(storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask() != null) {
 157                         String storedIpAddress = extractIpv4Address(storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask()
 158                                 ,storedIpv4MatchArbitraryBitMask.getIpv4SourceArbitraryBitmask());
 159                         if(MatchComparatorHelper.compareStringNullSafe(storedIpv4MatchArbitraryBitMask.getIpv4SourceArbitraryBitmask().getValue(),
 160                                 statsIpv4MatchArbitraryBitMask.getIpv4SourceArbitraryBitmask().getValue())) {
 161                             verdict = MatchComparatorHelper.compareStringNullSafe(storedIpAddress,
 162                                     statsIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask().getValue());
 163                         }
 164                         else {
 165                             verdict = false;
 166                         }
 167                 }
 168             }
 169             else {
 170                 final Boolean nullCheckOut = checkNullValues(storedLayer3Match, statsLayer3Match);
 171                 if (nullCheckOut != null) {
 172                     verdict = nullCheckOut;
 173                 } else {
 174                     verdict = storedLayer3Match.equals(statsLayer3Match);
 175                 }
 176             }
 177         }
 178         else if (statsLayer3Match instanceof Ipv4Match && storedLayer3Match instanceof Ipv4MatchArbitraryBitMask) {
 179             // Here stored netmask is an instance of Ipv4MatchArbitraryBitMask, when it is pushed in to switch
 180             // it automatically converts it in to cidr format in case of certain subnet masks ( consecutive ones or zeroes)
 181             // Eg:- stats src/dest -> 1.1.1.0/24  stored src/dest -> 1.1.1.0/255.255.255.0
 182             final Ipv4Match statsIpv4Match = (Ipv4Match) statsLayer3Match;
 183             final Ipv4MatchArbitraryBitMask storedIpv4MatchArbitraryBitMask = (Ipv4MatchArbitraryBitMask) storedLayer3Match;
 184             if (storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask() != null) {
 185                 Ipv4Prefix ipv4PrefixDestination;
 186                 if (storedIpv4MatchArbitraryBitMask.getIpv4DestinationArbitraryBitmask() != null) {
 187                     byte[] destByteMask = convertArbitraryMaskToByteArray(storedIpv4MatchArbitraryBitMask.getIpv4DestinationArbitraryBitmask());
 188                     ipv4PrefixDestination = createPrefix(storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask(), destByteMask);
 189                 }
 190                 else{
 191                     ipv4PrefixDestination = createPrefix(storedIpv4MatchArbitraryBitMask.getIpv4DestinationAddressNoMask());
 192                 }
 193                 verdict = MatchComparatorHelper.compareIpv4PrefixNullSafe(ipv4PrefixDestination, statsIpv4Match.getIpv4Destination());
 194                 if(verdict == false) {
 195                     return verdict;
 196                 }
 197             }
 198             if (storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask() != null) {
 199                 Ipv4Prefix ipv4PrefixSource;
 200                 if (storedIpv4MatchArbitraryBitMask.getIpv4SourceArbitraryBitmask() != null) {
 201                     byte[] srcByteMask = convertArbitraryMaskToByteArray(storedIpv4MatchArbitraryBitMask.getIpv4SourceArbitraryBitmask());
 202                     ipv4PrefixSource = createPrefix(storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask(), srcByteMask);
 203                 }
 204                 else {
 205                     ipv4PrefixSource = createPrefix(storedIpv4MatchArbitraryBitMask.getIpv4SourceAddressNoMask());
 206                 }
 207                 verdict = MatchComparatorHelper.compareIpv4PrefixNullSafe(ipv4PrefixSource, statsIpv4Match.getIpv4Source());
 208             }
 209         } else {
 210             final Boolean nullCheckOut = checkNullValues(storedLayer3Match, statsLayer3Match);
 211             if (nullCheckOut != null) {
 212                 verdict = nullCheckOut;
 213             } else {
 214                 verdict = storedLayer3Match.equals(statsLayer3Match);
 215             }
 216         }
 217         return verdict;
 218     }
 219
 220
 221     /**
 222      * TODO: why don't we use the default Ipv4Prefix.equals()?
 223      *
 224      * @param statsIpAddress
 225      * @param storedIpAddress
 226      * @return true if IPv4prefixes equals
 227      */
 228     static boolean IpAddressEquals(final Ipv4Prefix statsIpAddress, final Ipv4Prefix storedIpAddress) {
 229         final IntegerIpAddress statsIpAddressInt = MatchComparatorHelper.strIpToIntIp(statsIpAddress.getValue());
 230         final IntegerIpAddress storedIpAddressInt = MatchComparatorHelper.strIpToIntIp(storedIpAddress.getValue());
 231
 232         if (ipAndMaskBasedMatch(statsIpAddressInt, storedIpAddressInt)) {
 233             return true;
 234         }
 235         if (ipBasedMatch(statsIpAddressInt, storedIpAddressInt)) {
 236             return true;
 237         }
 238         return false;
 239     }
 240
 241     static boolean ipAndMaskBasedMatch(final IntegerIpAddress statsIpAddressInt,
 242             final IntegerIpAddress storedIpAddressInt) {
 243         return ((statsIpAddressInt.getIp() & statsIpAddressInt.getMask()) == (storedIpAddressInt.getIp() & storedIpAddressInt
 244                 .getMask()));
 245     }
 246
 247     static boolean ipBasedMatch(final IntegerIpAddress statsIpAddressInt, final IntegerIpAddress storedIpAddressInt) {
 248         return (statsIpAddressInt.getIp() == storedIpAddressInt.getIp());
 249     }
 250
 251
 252     private static boolean IpAddressEquals(Ipv6Prefix statsIpv6, Ipv6Prefix storedIpv6) {
 253         final String[] statsIpMask = statsIpv6.getValue().split("/");
 254         final String[] storedIpMask = storedIpv6.getValue().split("/");
 255         if(! (statsIpMask.length > 1 && storedIpMask.length > 1 &&  statsIpMask[1].equals(storedIpMask[1]))){
 256             return false;
 257         }
 258         if(InetAddresses.forString(statsIpMask[0]).equals(InetAddresses.forString(storedIpMask[0]))){
 259             return true;
 260         }
 261         return false;
 262     }
 263
 264
 265     static Boolean checkNullValues(final Object v1, final Object v2) {
 266         Boolean verdict = null;
 267         if (v1 == null && v2 != null) {
 268             verdict = Boolean.FALSE;
 269         } else if (v1 != null && v2 == null) {
 270             verdict = Boolean.FALSE;
 271         } else if (v1 == null && v2 == null) {
 272             verdict = Boolean.TRUE;
 273         }
 274
 275         return verdict;
 276     }
 277
 278     static boolean compareIpv4PrefixNullSafe(final Ipv4Prefix statsIpv4, final Ipv4Prefix storedIpv4) {
 279         boolean verdict = true;
 280         final Boolean checkDestNullValuesOut = checkNullValues(storedIpv4, statsIpv4);
 281         if (checkDestNullValuesOut != null) {
 282             verdict = checkDestNullValuesOut;
 283         } else if (!IpAddressEquals(statsIpv4, storedIpv4)) {
 284             verdict = false;
 285         }
 286         return verdict;
 287     }
 288
 289     static boolean compareStringNullSafe(final String stringA, final String stringB) {
 290         boolean verdict = true;
 291         final Boolean checkDestNullValuesOut = checkNullValues(stringA,stringB);
 292         if (checkDestNullValuesOut != null) {
 293             verdict = checkDestNullValuesOut;
 294         }else if (!stringA.equals(stringB)) {
 295             verdict = false;
 296         }
 297         return verdict;
 298     }
 299
 300     private static boolean compareIpv6PrefixNullSafe(Ipv6Prefix statsIpv6, Ipv6Prefix storedIpv6) {
 301         boolean verdict = true;
 302         final Boolean checkDestNullValuesOut = checkNullValues(statsIpv6, storedIpv6);
 303         if (checkDestNullValuesOut != null) {
 304             verdict = checkDestNullValuesOut;
 305         } else if (!IpAddressEquals(statsIpv6, storedIpv6)) {
 306             verdict = false;
 307         }
 308
 309         return verdict;
 310     }
 311
 312     /**
 313      * Method return integer version of ip address. Converted int will be mask if mask specified
 314      */
 315     static IntegerIpAddress strIpToIntIp(final String ipAddresss) {
 316
 317         final String[] parts = ipAddresss.split("/");
 318         final String ip = parts[0];
 319         int prefix;
 320
 321         if (parts.length < 2) {
 322             prefix = DEFAULT_SUBNET;
 323         } else {
 324             prefix = Integer.parseInt(parts[1]);
 325             if (prefix < 0 || prefix > IPV4_MASK_LENGTH) {
 326                 final StringBuilder stringBuilder = new StringBuilder(
 327                         "Valid values for mask are from range 0 - 32. Value ");
 328                 stringBuilder.append(prefix);
 329                 stringBuilder.append(" is invalid.");
 330                 throw new IllegalStateException(stringBuilder.toString());
 331             }
 332         }
 333
 334         IntegerIpAddress integerIpAddress = null;
 335
 336         final Inet4Address addr = ((Inet4Address) InetAddresses.forString(ip));
 337         final byte[] addrBytes = addr.getAddress();
 338         // FIXME: what is meaning of anding with 0xFF? Probably could be removed.
 339         final int ipInt = ((addrBytes[POSITION_OCTET_1] & 0xFF) << SHIFT_OCTET_1)
 340                 | ((addrBytes[POSITION_OCTET_2] & 0xFF) << SHIFT_OCTET_2)
 341                 | ((addrBytes[POSITION_OCTET_3] & 0xFF) << SHIFT_OCTET_3)
 342                 | ((addrBytes[POSITION_OCTET_4] & 0xFF) << SHIFT_OCTET_4);
 343
 344         // FIXME: Is this valid?
 345         final int mask = 0xffffffff << DEFAULT_SUBNET - prefix;
 346
 347         integerIpAddress = new IntegerIpAddress(ipInt, mask);
 348
 349         return integerIpAddress;
 350     }
 351
 352     static boolean isArbitraryBitMask(byte[] byteMask) {
 353         if (byteMask == null) {
 354             return false;
 355         }
 356         else {
 357             ArrayList<Integer> integerMaskArrayList = new ArrayList<Integer>();
 358             String maskInBits;
 359             // converting byte array to bits
 360             maskInBits = new BigInteger(1, byteMask).toString(2);
 361             ArrayList<String> stringMaskArrayList = new ArrayList<String>(Arrays.asList(maskInBits.split("(?!^)")));
 362             for(String string:stringMaskArrayList){
 363                 integerMaskArrayList.add(Integer.parseInt(string));
 364             }
 365             return checkArbitraryBitMask(integerMaskArrayList);
 366         }
 367     }
 368
 369     static boolean checkArbitraryBitMask(ArrayList<Integer> arrayList) {
 370         // checks 0*1* case - Leading zeros in arrayList are truncated
 371         if(arrayList.size()>0 && arrayList.size()<32) {
 372             return true;
 373         }
 374         //checks 1*0*1 case
 375         else {
 376             for(int i=0; i<arrayList.size()-1;i++) {
 377                 if(arrayList.get(i) ==0 && arrayList.get(i+1) == 1) {
 378                     return true;
 379                 }
 380             }
 381         }
 382         return false;
 383     }
 384
 385     static final byte[] convertArbitraryMaskToByteArray(DottedQuad mask) {
 386         String maskValue;
 387         if(mask.getValue() != null && mask != null){
 388             maskValue  = mask.getValue();
 389         }
 390         else maskValue = DEFAULT_ARBITRARY_BIT_MASK;
 391         InetAddress maskInIpFormat = null;
 392         try {
 393             maskInIpFormat = InetAddress.getByName(maskValue);
 394         } catch (UnknownHostException e) {
 395             LOG.error("Failed to recognize the host while converting mask ", e);
 396         }
 397         byte[] bytes = maskInIpFormat.getAddress();
 398         return bytes;
 399     }
 400
 401
 402     static String extractIpv4Address(Ipv4Address ipAddress, DottedQuad netMask) {
 403         String actualIpAddress="";
 404         String[] netMaskParts = netMask.getValue().split("\\.");
 405         String[] ipAddressParts = ipAddress.getValue().split("\\.");
 406
 407         for(int i=0; i<ipAddressParts.length;i++) {
 408             int integerFormatIpAddress=Integer.parseInt(ipAddressParts[i]);
 409             int integerFormatNetMask=Integer.parseInt(netMaskParts[i]);
 410             int ipAddressPart=(integerFormatIpAddress) & (integerFormatNetMask);
 411             actualIpAddress += ipAddressPart;
 412             if(i != ipAddressParts.length -1 ) {
 413                 actualIpAddress = actualIpAddress+".";
 414             }
 415         }
 416         return actualIpAddress;
 417     }
 418
 419     static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address, final byte [] bytemask){
 420         return createPrefix(ipv4Address, String.valueOf(countBits(bytemask)));
 421     }
 422
 423     static int countBits(final byte[] mask) {
 424         int netmask = 0;
 425         for (byte b : mask) {
 426             netmask += Integer.bitCount(UnsignedBytes.toInt(b));
 427         }
 428         return netmask;
 429     }
 430
 431     static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address){
 432         return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + IPV4_ADDRESS_LENGTH);
 433     }
 434
 435     static Ipv4Prefix createPrefix(final Ipv4Address ipv4Address, final String mask){
 436         /*
 437          * Ipv4Address has already validated the address part of the prefix,
 438          * It is mandated to comply to the same regexp as the address
 439          * There is absolutely no point rerunning additional checks vs this
 440          * Note - there is no canonical form check here!!!
 441          */
 442         if (null != mask && !mask.isEmpty()) {
 443             return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + mask);
 444         } else {
 445             return new Ipv4Prefix(ipv4Address.getValue() + PREFIX_SEPARATOR + IPV4_ADDRESS_LENGTH);
 446         }
 447     }
 448 }