Examples of java.net.Inet4Address

java.net.Inet4Address
etf.org/rfc/rfc790.txt"> RFC 790: Assigned Numbers, RFC 1918: Address Allocation for Private Internets, and RFC 2365: Administratively Scoped IP Multicast
Textual representation of IP addresses
Textual representation of IPv4 address used as input to methods takes one of the following forms:

d.d.d.d

d.d.d

d.d

d

When four parts are specified, each is interpreted as a byte of data and assigned, from left to right, to the four bytes of an IPv4 address.
When a three part address is specified, the last part is interpreted as a 16-bit quantity and placed in the right most two bytes of the network address. This makes the three part address format convenient for specifying Class B net- work addresses as 128.net.host.
When a two part address is supplied, the last part is interpreted as a 24-bit quantity and placed in the right most three bytes of the network address. This makes the two part address format convenient for specifying Class A network addresses as net.host.
When only one part is given, the value is stored directly in the network address without any byte rearrangement.
For methods that return a textual representation as output value, the first form, i.e. a dotted-quad string, is used.
The Scope of a Multicast Address
Historically the IPv4 TTL field in the IP header has doubled as a multicast scope field: a TTL of 0 means node-local, 1 means link-local, up through 32 means site-local, up through 64 means region-local, up through 128 means continent-local, and up through 255 are global. However, the administrative scoping is preferred. Please refer to RFC 2365: Administratively Scoped IP Multicast @since 1.4

  }
  
  @Test
  public void testCompareDifferentVersions() throws UnknownHostException {
    
    Inet4Address ipv4 = Inet4AddressComparatorTest.ip("10.10.10.10");
    Inet6Address ipv6 = Inet6AddressComparatorTest.ip("1111:1111:1111:1111:1111:1111:1111:1111");
    
    Assert.assertTrue(V4_LESS.compare(ipv4, ipv6) < 0);
    Assert.assertTrue(V4_LESS.compare(ipv6, ipv4) > 0);
    Assert.assertTrue(V6_LESS.compare(ipv4, ipv6) > 0);

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         * result in dns lookup, so we don't serialize it.
         */
        kryo.register(Inet4Address.class, new Serializer() {
            @Override
            public void writeObjectData(ByteBuffer buffer, Object object) {
                Inet4Address i4a = (Inet4Address) object;
                kryo.writeObject(buffer, i4a.getAddress());
            }
            
            @Override
            @SuppressWarnings("unchecked")
            public <T> T readObjectData(ByteBuffer buffer, Class<T> type) {

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   * Get the network address.
   * 
   * @return
   */
  public Inet4Address getNetworAddress(String dialServerAddress) {
    Inet4Address selectedInetAddress = null;
    try {
      InterfaceAddress interfaceAddress = null;
      if (dialServerAddress != null) {
        String prefix = dialServerAddress.substring(0, dialServerAddress.indexOf('.') + 1);
        Log.d(LOG_TAG, "prefix=" + prefix);

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  public static TeredoInfo getTeredoInfo(Inet6Address ip) {
    Preconditions.checkArgument(isTeredoAddress(ip),
        "Address '%s' is not a Teredo address.", ip.getHostAddress());


    byte[] bytes = ip.getAddress();
    Inet4Address server = getInet4Address(copyOfRange(bytes, 4, 8));


    int flags = ByteStreams.newDataInput(bytes, 8).readShort() & 0xffff;


    // Teredo obfuscates the mapped client port, per section 4 of the RFC.
    int port = ~ByteStreams.newDataInput(bytes, 10).readShort() & 0xffff;


    byte[] clientBytes = copyOfRange(bytes, 12, 16);
    for (int i = 0; i < clientBytes.length; i++) {
      // Teredo obfuscates the mapped client IP, per section 4 of the RFC.
      clientBytes[i] = (byte) ~clientBytes[i];
    }
    Inet4Address client = getInet4Address(clientBytes);


    return new TeredoInfo(server, client, port, flags);
  }

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                    boolean addedIp = false;
                    while (!interfaces.isEmpty()) {
                        NetworkInterface intf = interfaces.poll();
                        Enumeration<InetAddress> inetAddrs = intf.getInetAddresses();
                        Inet6Address inet6addr = null;
                        Inet4Address inet4addr = null;
                        while (inetAddrs.hasMoreElements()) {
                            InetAddress addr = inetAddrs.nextElement();
                            if (addr instanceof Inet6Address) {
                                inet6addr = (Inet6Address)addr;
                                if (inet6addr.isLinkLocalAddress()) {
                                    inet6addr = null;
                                }
                            } else if (addr instanceof Inet4Address) {
                                inet4addr = (Inet4Address)addr;
                            }
                        }
                        if (inet4addr != null) {
                            stringer.value(inet4addr.getHostAddress());
                            addedIp = true;
                        }
                        if (inet6addr != null) {
                            stringer.value(inet6addr.getHostAddress());
                            addedIp = true;

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  public static TeredoInfo getTeredoInfo(Inet6Address ip) {
    Preconditions.checkArgument(isTeredoAddress(ip),
        "Address '%s' is not a Teredo address.", toAddrString(ip));


    byte[] bytes = ip.getAddress();
    Inet4Address server = getInet4Address(Arrays.copyOfRange(bytes, 4, 8));


    int flags = ByteStreams.newDataInput(bytes, 8).readShort() & 0xffff;


    // Teredo obfuscates the mapped client port, per section 4 of the RFC.
    int port = ~ByteStreams.newDataInput(bytes, 10).readShort() & 0xffff;


    byte[] clientBytes = Arrays.copyOfRange(bytes, 12, 16);
    for (int i = 0; i < clientBytes.length; i++) {
      // Teredo obfuscates the mapped client IP, per section 4 of the RFC.
      clientBytes[i] = (byte) ~clientBytes[i];
    }
    Inet4Address client = getInet4Address(clientBytes);


    return new TeredoInfo(server, client, port, flags);
  }

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        assertAddressToLong("202.12.128.254", 3389817086L);
    }


    private static void assertAddressToLong(String address, long ip)
    {
        Inet4Address addr = (Inet4Address) InetAddresses.forString(address);
        assertEquals(Inet4Network.addressToLong(addr), ip);
    }

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        assertFromAddress("208.86.202.0", "208.86.202.0/24", 24);
    }


    private static void assertFromAddress(String address, String cidr, int bits)
    {
        Inet4Address addr = (Inet4Address) InetAddresses.forString(address);
        assertEquals(Inet4Network.fromAddress(addr, bits), Inet4Network.fromCidr(cidr));
    }

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        assertTruncatedFromAddress("208.86.202.0", "208.86.202.0/24", 24);
    }


    private static void assertTruncatedFromAddress(String address, String cidr, int bits)
    {
        Inet4Address addr = (Inet4Address) InetAddresses.forString(address);
        assertEquals(Inet4Network.truncatedFromAddress(addr, bits), Inet4Network.fromCidr(cidr));
    }

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        assertFalse(containsAddress("202.12.128.0/18", "202.12.192.0"));
    }


    private static boolean containsAddress(String cidr, String address)
    {
        Inet4Address addr = (Inet4Address) InetAddresses.forString(address);
        return Inet4Network.fromCidr(cidr).containsAddress(addr);
    }

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Examples of java.net.Inet4Address

Textual representation of IP addresses

The Scope of a Multicast Address

Related Classes of java.net.Inet4Address