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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;
/**
* Server (listening) Bluetooth Socket.
*
* Currently only supports RFCOMM sockets.
*
* RFCOMM is a connection orientated, streaming transport over Bluetooth. It is
* also known as the Serial Port Profile (SPP).
*
* TODO: Consider implementing SCO and L2CAP sockets.
* TODO: Clean up javadoc grammer and formatting.
* TODO: Remove @hide
* @hide
*/
public final class BluetoothServerSocket implements Closeable {
private final BluetoothSocket mSocket;
/**
* Construct a listening, secure RFCOMM server socket.
* The remote device connecting to this socket will be authenticated and
* communication on this socket will be encrypted.
* Call #accept to retrieve connections to this socket.
* @return An RFCOMM BluetoothServerSocket
* @throws IOException On error, for example Bluetooth not available, or
* insufficient permissions.
*/
public static BluetoothServerSocket listenUsingRfcommOn(int port) throws IOException {
BluetoothServerSocket socket = new BluetoothServerSocket(true, true);
try {
socket.mSocket.bindListenNative(port);
} catch (IOException e) {
try {
socket.close();
} catch (IOException e2) { }
throw e;
}
return socket;
}
/**
* Construct an unencrypted, unauthenticated, RFCOMM server socket.
* Call #accept to retrieve connections to this socket.
* @return An RFCOMM BluetoothServerSocket
* @throws IOException On error, for example Bluetooth not available, or
* insufficient permissions.
*/
public static BluetoothServerSocket listenUsingInsecureRfcommOn(int port) throws IOException {
BluetoothServerSocket socket = new BluetoothServerSocket(false, false);
try {
socket.mSocket.bindListenNative(port);
} catch (IOException e) {
try {
socket.close();
} catch (IOException e2) { }
throw e;
}
return socket;
}
/**
* Construct a socket for incoming connections.
* @param auth Require the remote device to be authenticated
* @param encrypt Require the connection to be encrypted
* @throws IOException On error, for example Bluetooth not available, or
* insufficient priveleges
*/
private BluetoothServerSocket(boolean auth, boolean encrypt) throws IOException {
mSocket = new BluetoothSocket(-1, auth, encrypt, null, -1);
}
/**
* Block until a connection is established.
* Returns a connected #BluetoothSocket. This server socket can be reused
* for subsequent incoming connections by calling #accept repeatedly.
* #close can be used to abort this call from another thread.
* @return A connected #BluetoothSocket
* @throws IOException On error, for example this call was aborted
*/
public BluetoothSocket accept() throws IOException {
return accept(-1);
}
/**
* Block until a connection is established, with timeout.
* Returns a connected #BluetoothSocket. This server socket can be reused
* for subsequent incoming connections by calling #accept repeatedly.
* #close can be used to abort this call from another thread.
* @return A connected #BluetoothSocket
* @throws IOException On error, for example this call was aborted, or
* timeout
*/
public BluetoothSocket accept(int timeout) throws IOException {
return mSocket.acceptNative(timeout);
}
/**
* Closes this socket.
* This will cause other blocking calls on this socket to immediately
* throw an IOException.
*/
public void close() throws IOException {
mSocket.closeNative();
}
}
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