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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.bluetooth;
import java.io.Closeable;
import java.io.IOException;
/**
* A listening Bluetooth socket.
*
* <p>The interface for Bluetooth Sockets is similar to that of TCP sockets:
* {@link java.net.Socket} and {@link java.net.ServerSocket}. On the server
* side, use a {@link BluetoothServerSocket} to create a listening server
* socket. It will return a new, connected {@link BluetoothSocket} on an
* accepted connection. On the client side, use the same
* {@link BluetoothSocket} object to both intiate the outgoing connection,
* and to manage the connected socket.
*
* <p>The most common type of Bluetooth Socket is RFCOMM. RFCOMM is a
* connection orientated, streaming transport over Bluetooth. It is also known
* as the Serial Port Profile (SPP).
*
* <p>Use {@link BluetoothDevice#createRfcommSocket} to create a new {@link
* BluetoothSocket} ready for an outgoing connection to a remote
* {@link BluetoothDevice}.
*
* <p>Use {@link BluetoothAdapter#listenUsingRfcommOn} to create a listening
* {@link BluetoothServerSocket} ready for incoming connections to the local
* {@link BluetoothAdapter}.
*
* <p>{@link BluetoothSocket} and {@link BluetoothServerSocket} are thread
* safe. In particular, {@link #close} will always immediately abort ongoing
* operations and close the socket.
*/
public final class BluetoothServerSocket implements Closeable {
/*package*/ final BluetoothSocket mSocket;
/**
* Construct a socket for incoming connections.
* @param type type of socket
* @param auth require the remote device to be authenticated
* @param encrypt require the connection to be encrypted
* @param port remote port
* @throws IOException On error, for example Bluetooth not available, or
* insufficient priveleges
*/
/*package*/ BluetoothServerSocket(int type, boolean auth, boolean encrypt, int port)
throws IOException {
mSocket = new BluetoothSocket(type, -1, auth, encrypt, null, port);
}
/**
* Block until a connection is established.
* <p>Returns a connected {@link BluetoothSocket} on successful connection.
* <p>Once this call returns, it can be called again to accept subsequent
* incoming connections.
* <p>{@link #close} can be used to abort this call from another thread.
* @return a connected {@link BluetoothSocket}
* @throws IOException on error, for example this call was aborted, or
* timeout
*/
public BluetoothSocket accept() throws IOException {
return accept(-1);
}
/**
* Block until a connection is established, with timeout.
* <p>Returns a connected {@link BluetoothSocket} on successful connection.
* <p>Once this call returns, it can be called again to accept subsequent
* incoming connections.
* <p>{@link #close} can be used to abort this call from another thread.
* @return a connected {@link BluetoothSocket}
* @throws IOException on error, for example this call was aborted, or
* timeout
*/
public BluetoothSocket accept(int timeout) throws IOException {
return mSocket.acceptNative(timeout);
}
/**
* Immediately close this socket, and release all associated resources.
* <p>Causes blocked calls on this socket in other threads to immediately
* throw an IOException.
*/
public void close() throws IOException {
mSocket.closeNative();
}
}
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