Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions) Summary: [Nested Classes](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#nestedclasses) \| [Constants](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#constants) \| [Inherited Constants](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#inhconstants) \| [Fields](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#lfields) \| [Methods](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/net/L2capNetworkSpecifier#inhmethods)

# L2capNetworkSpecifier

*** ** * ** ***


`
public

final

class
L2capNetworkSpecifier
`


`


`

`

extends https://developer.android.com/reference/android/net/NetworkSpecifier


`

`


implements

https://developer.android.com/reference/android/os/Parcelable


`

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [android.net.NetworkSpecifier](https://developer.android.com/reference/android/net/NetworkSpecifier) ||
|   | ↳ | android.net.L2capNetworkSpecifier |

<br />

*** ** * ** ***

A `https://developer.android.com/reference/android/net/NetworkSpecifier` used to identify an L2CAP network over BLE.

An L2CAP network is not symmetrical, meaning there exists both a server (Bluetooth peripheral)
and a client (Bluetooth central) node. This specifier contains the information required to
request a client L2CAP network using `https://developer.android.com/reference/android/net/ConnectivityManager#requestNetwork(android.net.NetworkRequest,%20android.app.PendingIntent)` while specifying
the remote MAC address, and Protocol/Service Multiplexer (PSM). It can also contain information
allocated by the system when reserving a server network using `https://developer.android.com/reference/android/net/ConnectivityManager#reserveNetwork(android.net.NetworkRequest,%20android.os.Handler,%20android.net.ConnectivityManager.NetworkCallback)` such as the Protocol/Service Multiplexer (PSM). In both
cases, the header compression option must be specified.

An L2CAP server network allocates a Protocol/Service Multiplexer (PSM) to be advertised to the
client. A new server network must always be reserved using `ConnectivityManager#reserveNetwork`. The subsequent `https://developer.android.com/reference/android/net/ConnectivityManager.NetworkCallback#onReserved(android.net.NetworkCapabilities)` callback includes an `L2CapNetworkSpecifier`. The `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#getPsm()` method will return the Protocol/Service Multiplexer
(PSM) of the reserved network so that the server can advertise it to the client and the client
can connect.
An L2CAP server network is backed by a `https://developer.android.com/reference/android/bluetooth/BluetoothServerSocket` which can,
in theory, accept many connections. However, before SDK version `https://developer.android.com/reference/android/os/Build.VERSION_CODES#VANILLA_ICE_CREAM` Bluetooth APIs do not expose the channel ID, so these
connections are indistinguishable. In practice, this means that the network matching semantics in
ConnectivityService will tear down all but the first connection.

When the connection between client and server completes, a `https://developer.android.com/reference/android/net/Network` whose capabilities
satisfy this `L2capNetworkSpecifier` will connect and the usual callbacks, such as `https://developer.android.com/`, will be called on the callback object passed to `ConnectivityManager#reserveNetwork` or `ConnectivityManager#requestNetwork`.

## Summary

| ### Nested classes ||
|---|---|
| ` class` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier.Builder` A builder class for L2capNetworkSpecifier. |

| ### Constants ||
|---|---|
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_6LOWPAN` Use 6lowpan header compression as specified in rfc6282. |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_ANY` Accept any form of header compression. |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_NONE` Do not compress packets on this network. |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#PSM_ANY` Match any Protocol/Service Multiplexer (PSM). |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_ANY` Match any role. |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_CLIENT` Specifier describes a client network, i.e., the device is the Bluetooth central. |
| `int` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_SERVER` Specifier describes a server network, i.e., the device is the Bluetooth peripheral. |

| ### Inherited constants |
|---|
| From interface `https://developer.android.com/reference/android/os/Parcelable` |---|---| | `int` | `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `https://developer.android.com/reference/android/os/Parcelable#describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor. | | `int` | `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`: 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 https://developer.android.com/reference/android/os/Parcelable.Creator<https://developer.android.com/reference/android/net/L2capNetworkSpecifier>` | `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#CREATOR` |

| ### Public methods ||
|---|---|
| ` boolean` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#canBeSatisfiedBy(android.net.NetworkSpecifier)(https://developer.android.com/reference/android/net/NetworkSpecifier other) ` |
| ` int` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
| ` boolean` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. |
| ` int` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#getHeaderCompression()() ` Returns the compression mechanism for this network. |
| ` int` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#getPsm()() ` Returns the Protocol/Service Multiplexer (PSM) for this network to connect to. |
| ` https://developer.android.com/reference/android/net/MacAddress` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#getRemoteAddress()() ` Returns the remote MAC address for this network to connect to. |
| ` int` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#getRole()() ` Returns the role to be used for this network. |
| ` int` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#hashCode()() ` Returns a hash code value for the object. |
| ` https://developer.android.com/reference/android/net/NetworkSpecifier` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#redact()() ` |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#toString()() ` Returns a string representation of the object. |
| ` void` | ` https://developer.android.com/reference/android/net/L2capNetworkSpecifier#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) ` Flatten this object in to a Parcel. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||
| From interface ` https://developer.android.com/reference/android/os/Parcelable ` |---|---| | ` abstract int` | ` https://developer.android.com/reference/android/os/Parcelable#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. | | ` abstract void` | ` https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) ` Flatten this object in to a Parcel. | ||

## Constants

### HEADER_COMPRESSION_6LOWPAN

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int HEADER_COMPRESSION_6LOWPAN
```

Use 6lowpan header compression as specified in rfc6282.

<br />

Constant Value:

2
(0x00000002)


### HEADER_COMPRESSION_ANY

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int HEADER_COMPRESSION_ANY
```

Accept any form of header compression.

This option is only meaningful in `https://developer.android.com/reference/android/net/NetworkRequest`s. Specifiers for actual L2CAP
networks never have this option set.

<br />

Constant Value:

0
(0x00000000)


### HEADER_COMPRESSION_NONE

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int HEADER_COMPRESSION_NONE
```

Do not compress packets on this network.

<br />

Constant Value:

1
(0x00000001)


### PSM_ANY

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int PSM_ANY
```

Match any Protocol/Service Multiplexer (PSM).

This PSM value is only meaningful in `https://developer.android.com/reference/android/net/NetworkRequest`s. Specifiers for actual L2CAP
networks never have this value set.

<br />

Constant Value:

0
(0x00000000)


### ROLE_ANY

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int ROLE_ANY
```

Match any role.

This role is only meaningful in `https://developer.android.com/reference/android/net/NetworkRequest`s. Specifiers for actual L2CAP
networks never have this role set.

<br />

Constant Value:

0
(0x00000000)


### ROLE_CLIENT

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int ROLE_CLIENT
```

Specifier describes a client network, i.e., the device is the Bluetooth central.

<br />

Constant Value:

1
(0x00000001)


### ROLE_SERVER

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final int ROLE_SERVER
```

Specifier describes a server network, i.e., the device is the Bluetooth peripheral.

<br />

Constant Value:

2
(0x00000002)


## Fields

### CREATOR

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public static final Creator<L2capNetworkSpecifier> CREATOR
```

<br />

<br />

## Public methods

### canBeSatisfiedBy

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public boolean canBeSatisfiedBy (NetworkSpecifier other)
```

<br />

<br />

| Parameters ||
|---|---|
| `other` | `NetworkSpecifier` <br /> |

| Returns ||
|---|---|
| `boolean` | <br /> |

### describeContents

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int describeContents ()
```

Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation. For example, if the object will
include a file descriptor in the output of `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`,
the return value of this method must include the
`https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` bit.

<br />

| Returns ||
|---|---|
| `int` | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or - `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` |

### equals

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean equals (Object obj)
```

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


The `equals` method implements an equivalence relation
on non-null object references:

- It is *reflexive*: for any non-null reference value `x`, `x.equals(x)` should return `true`.
- It is *symmetric*: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`.
- It is *transitive*: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`.
- It is *consistent*: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified.
- For any non-null reference value `x`, `x.equals(null)` should return `false`.


An equivalence relation partitions the elements it operates on
into *equivalence classes*; all the members of an
equivalence class are equal to each other. Members of an
equivalence class are substitutable for each other, at least
for some purposes.

<br />

| Parameters ||
|---|---|
| `obj` | `Object`: the reference object with which to compare. <br /> |

| Returns ||
|---|---|
| `boolean` | `true` if this object is the same as the obj argument; `false` otherwise. <br /> |

### getHeaderCompression

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public int getHeaderCompression ()
```

Returns the compression mechanism for this network.

<br />

| Returns ||
|---|---|
| `int` | Value is one of the following: - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_ANY` - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_NONE` - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#HEADER_COMPRESSION_6LOWPAN` |

### getPsm

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public int getPsm ()
```

Returns the Protocol/Service Multiplexer (PSM) for this network to connect to.

<br />

| Returns ||
|---|---|
| `int` | <br /> |

### getRemoteAddress

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public MacAddress getRemoteAddress ()
```

Returns the remote MAC address for this network to connect to.

The remote address is only meaningful for networks that have ROLE_CLIENT.

When receiving this `https://developer.android.com/reference/android/net/L2capNetworkSpecifier` from Connectivity APIs such as a `https://developer.android.com/reference/android/net/ConnectivityManager.NetworkCallback`, the MAC address is redacted.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/net/MacAddress` | This value may be `null`. <br /> |

### getRole

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public int getRole ()
```

Returns the role to be used for this network.

<br />

| Returns ||
|---|---|
| `int` | Value is one of the following: - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_ANY` - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_CLIENT` - `https://developer.android.com/reference/android/net/L2capNetworkSpecifier#ROLE_SERVER` |

### hashCode

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int hashCode ()
```

Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
`https://developer.android.com/reference/java/util/HashMap`.


The general contract of `hashCode` is:

- Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
- If two objects are equal according to the `https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)` method, then calling the `hashCode` method on each of the two objects must produce the same integer result.
- It is *not* required that if two objects are unequal according to the `https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

<br />

<br />

| Returns ||
|---|---|
| `int` | a hash code value for this object. <br /> |

### redact

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  
Also in [U Extensions 17](https://developer.android.com/sdkExtensions)

```
public NetworkSpecifier redact ()
```

<br />

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/net/NetworkSpecifier` | This value may be `null`. <br /> |

### toString

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String toString ()
```

Returns a string representation of the object.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | a string representation of the object. <br /> |

### writeToParcel

Added in [API level 36](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void writeToParcel (Parcel dest, 
                int flags)
```

Flatten this object in to a Parcel.

<br />

| Parameters ||
|---|---|
| `dest` | `Parcel`: This value cannot be `null`. <br /> |
| `flags` | `int`: Additional flags about how the object should be written. May be 0 or `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of the following: - `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` |