WifiP2pDirInfo


public final class WifiP2pDirInfo
extends Object implements Parcelable

java.lang.Object
   ↳ android.net.wifi.p2p.WifiP2pDirInfo


This object contains the Device Identity Resolution (DIR) Info to check if the device is a previously paired device. The device advertises this information in Bluetooth LE advertising packets and Unsynchronized Service Discovery (USD) frames. The device receiving DIR Info uses this information to identify that the peer device is a previously paired device. For Details, refer Wi-Fi Alliance Wi-Fi Direct R2 specification section 3.8.2 Pairing Identity and section 3.9.2.3.2 Optional Advertising Data Elements.

Summary

Inherited constants

int CONTENTS_FILE_DESCRIPTOR

Descriptor bit used with describeContents(): indicates that the Parcelable object's flattened representation includes a file descriptor.

int PARCELABLE_WRITE_RETURN_VALUE

Flag for use with writeToParcel(Parcel, int): the object being written is a return value, that is the result of a function such as "Parcelable someFunction()", "void someFunction(out Parcelable)", or "void someFunction(inout Parcelable)".

Fields

public static final Creator<WifiP2pDirInfo> CREATOR

Implement the Parcelable interface

Public constructors

WifiP2pDirInfo(MacAddress macAddress, byte[] nonce, byte[] dirTag)

Constructor for Device Identity Resolution (DIR) Info generated based on the 128 bit Device Identity key.

Public methods

int describeContents()

Implement the Parcelable interface

byte[] getDirTag()

Get the DIR Tag value.

MacAddress getMacAddress()
byte[] getNonce()

Get the nonce value used to derive DIR Tag.

String toString()

Generates a string of all the defined elements.

void writeToParcel(Parcel dest, int flags)

Implement the Parcelable interface

Inherited methods

Object clone()

Creates and returns a copy of this object.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

void finalize()

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.

final Class<?> getClass()

Returns the runtime class of this Object.

int hashCode()

Returns a hash code value for the object.

final void notify()

Wakes up a single thread that is waiting on this object's monitor.

final void notifyAll()

Wakes up all threads that are waiting on this object's monitor.

String toString()

Returns a string representation of the object.

final void wait(long timeoutMillis, int nanos)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait(long timeoutMillis)

Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

final void wait()

Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

abstract int describeContents()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.

abstract void writeToParcel(Parcel dest, int flags)

Flatten this object in to a Parcel.

Fields

CREATOR

public static final Creator<WifiP2pDirInfo> CREATOR

Implement the Parcelable interface

Public constructors

WifiP2pDirInfo

public WifiP2pDirInfo (MacAddress macAddress, 
                byte[] nonce, 
                byte[] dirTag)

Constructor for Device Identity Resolution (DIR) Info generated based on the 128 bit Device Identity key. For details, refer Wi-Fi Alliance Wi-Fi Direct R2 specification Table 8.

Parameters
macAddress MacAddress: The MAC address of the P2P device interface. This value cannot be null.

nonce byte: Random number of 8 octets. This value cannot be null.

dirTag byte: Resolvable identity value of 8 octets derived based on the device MAC address, device identity key and P2P device MAC address. Tag = Truncate-64(HMAC-SHA-256(DevIk, "DIR" || P2P Device Address || Nonce)) This value cannot be null.

Public methods

describeContents

public int describeContents ()

Implement the Parcelable interface

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

getDirTag

public byte[] getDirTag ()

Get the DIR Tag value. See WifiP2pDirInfo

Returns
byte[] A byte-array of Tag value of size 8 octets. This value cannot be null.

getMacAddress

public MacAddress getMacAddress ()

Returns
MacAddress the MAC address of the P2P device interface. This value cannot be null.

getNonce

public byte[] getNonce ()

Get the nonce value used to derive DIR Tag. See WifiP2pDirInfo

Returns
byte[] A byte-array of random number of size 8 octets. This value cannot be null.

toString

public String toString ()

Generates a string of all the defined elements.

Returns
String a compiled string representing all elements

writeToParcel

public void writeToParcel (Parcel dest, 
                int flags)

Implement the Parcelable interface

Parameters
dest Parcel: This value cannot be null.

flags int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES