org.fourthline.cling.android

## Class AndroidNetworkAddressFactory

- java.lang.Object
- - org.fourthline.cling.transport.impl.NetworkAddressFactoryImpl
  - - org.fourthline.cling.android.AndroidNetworkAddressFactory

- All Implemented Interfaces:
    NetworkAddressFactory

      public class AndroidNetworkAddressFactory
      extends NetworkAddressFactoryImpl

  This factory tries to work around and patch some Android bugs.
  Author:
    Michael Pujos, Christian Bauer

- - ### Field Summary

    - ### Fields inherited from class org.fourthline.cling.transport.impl.NetworkAddressFactoryImpl

      `bindAddresses, DEFAULT_TCP_HTTP_LISTEN_PORT, networkInterfaces, streamListenPort, useAddresses, useInterfaces`

    - ### Fields inherited from interface org.fourthline.cling.transport.spi.NetworkAddressFactory

      `SYSTEM_PROPERTY_NET_ADDRESSES, SYSTEM_PROPERTY_NET_IFACES`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `AndroidNetworkAddressFactory(int streamListenPort)`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `discoverNetworkInterfaces()`
    `InetAddress` | `getLocalAddress(NetworkInterface networkInterface, boolean isIPv6, InetAddress remoteAddress)` Best-effort attempt finding a reachable local address for a given remote host.
    `protected boolean` | `isUsableAddress(NetworkInterface networkInterface, InetAddress address)` Validation of every discovered local address.
    `protected boolean` | `requiresNetworkInterface()`

    - ### Methods inherited from class org.fourthline.cling.transport.impl.NetworkAddressFactoryImpl

      `discoverBindAddresses, getAddressNetworkPrefixLength, getBindAddresses, getBindAddressInSubnetOf, getBroadcastAddress, getHardwareAddress, getInetAddresses, getInterfaceAddresses, getMulticastGroup, getMulticastPort, getNetworkInterfaces, getStreamListenPort, hasUsableNetwork, isInSubnet, isUsableNetworkInterface, logInterfaceInformation, logInterfaceInformation`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### AndroidNetworkAddressFactory

          public AndroidNetworkAddressFactory(int streamListenPort)

  - ### Method Detail

    - #### requiresNetworkInterface

          protected boolean requiresNetworkInterface()

      Overrides:
        `requiresNetworkInterface` in class `NetworkAddressFactoryImpl`
      Returns:
        `true` (the default) if a `MissingNetworkInterfaceException` should be thrown

    - #### isUsableAddress

          protected boolean isUsableAddress(NetworkInterface networkInterface,
                                InetAddress address)

      Description copied from class: `NetworkAddressFactoryImpl`
      Validation of every discovered local address.

      Override this method to customize which network addresses are used.

      The given implementation ignores addresses which are

      - not IPv4
      - the local loopback (yes, we ignore 127.0.0.1)
      Overrides:
        `isUsableAddress` in class `NetworkAddressFactoryImpl`
      Parameters:
        `networkInterface` - The interface to validate.
        `address` - The address of this interface to validate.
      Returns:
        True if the given address matches all validation criteria.

    - #### getLocalAddress

          public InetAddress getLocalAddress(NetworkInterface networkInterface,
                                    boolean isIPv6,
                                    InetAddress remoteAddress)

      Description copied from interface: `NetworkAddressFactory`
      Best-effort attempt finding a reachable local address for a given remote host.

      This method is called whenever a multicast datagram has been received. We need to be able to communicate with the sender using UDP unicast and we need to tell the sender how we are reachable with TCP requests. We need a local address that is in the same subnet as the senders address, that is reachable from the senders point of view.

      Specified by:
        `getLocalAddress` in interface `NetworkAddressFactory`
      Overrides:
        `getLocalAddress` in class `NetworkAddressFactoryImpl`
      Parameters:
        `networkInterface` - The network interface to examine.
        `isIPv6` - True if the given remote address is an IPv6 address.
        `remoteAddress` - The remote address for which to find a local address in the same subnet.
      Returns:
        A local address that is reachable from the given remote address.

    - #### discoverNetworkInterfaces

          protected void discoverNetworkInterfaces()
                                            throws InitializationException

      Overrides:
        `discoverNetworkInterfaces` in class `NetworkAddressFactoryImpl`
      Throws:
        `InitializationException`

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