| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 java.nio; |
| |
| import android.system.ErrnoException; |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.SocketAddress; |
| import java.net.SocketTimeoutException; |
| import java.nio.channels.ClosedChannelException; |
| import java.nio.channels.IllegalBlockingModeException; |
| import java.nio.channels.NotYetBoundException; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| import java.nio.channels.spi.SelectorProvider; |
| import java.nio.channels.UnresolvedAddressException; |
| import java.nio.channels.UnsupportedAddressTypeException; |
| import java.util.Set; |
| import libcore.io.IoUtils; |
| import static android.system.OsConstants.*; |
| |
| /** |
| * The default ServerSocketChannel. |
| */ |
| final class ServerSocketChannelImpl extends ServerSocketChannel implements FileDescriptorChannel { |
| |
| private final ServerSocketAdapter socket; |
| |
| private final Object acceptLock = new Object(); |
| |
| public ServerSocketChannelImpl(SelectorProvider sp) throws IOException { |
| super(sp); |
| this.socket = new ServerSocketAdapter(this); |
| } |
| |
| @Override public ServerSocket socket() { |
| return socket; |
| } |
| |
| @Override |
| public SocketChannel accept() throws IOException { |
| if (!isOpen()) { |
| throw new ClosedChannelException(); |
| } |
| if (!socket.isBound()) { |
| throw new NotYetBoundException(); |
| } |
| |
| // Create an empty socket channel. This will be populated by ServerSocketAdapter.implAccept. |
| SocketChannelImpl result = new SocketChannelImpl(provider(), false); |
| try { |
| begin(); |
| synchronized (acceptLock) { |
| try { |
| socket.implAccept(result); |
| } catch (SocketTimeoutException e) { |
| if (shouldThrowSocketTimeoutExceptionFromAccept(e)) { |
| throw e; |
| } |
| // Otherwise, this is a non-blocking socket and there's nothing ready, so we'll |
| // fall through and return null. |
| } |
| } |
| } finally { |
| end(result.isConnected()); |
| } |
| return result.isConnected() ? result : null; |
| } |
| |
| private boolean shouldThrowSocketTimeoutExceptionFromAccept(SocketTimeoutException e) { |
| if (isBlocking()) { |
| return true; |
| } |
| Throwable cause = e.getCause(); |
| if (cause instanceof ErrnoException) { |
| if (((ErrnoException) cause).errno == EAGAIN) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override protected void implConfigureBlocking(boolean blocking) throws IOException { |
| IoUtils.setBlocking(socket.getFD$(), blocking); |
| } |
| |
| @Override |
| synchronized protected void implCloseSelectableChannel() throws IOException { |
| if (!socket.isClosed()) { |
| socket.close(); |
| } |
| } |
| |
| @Override |
| public FileDescriptor getFD() { |
| return socket.getFD$(); |
| } |
| |
| private static class ServerSocketAdapter extends ServerSocket { |
| private final ServerSocketChannelImpl channelImpl; |
| |
| ServerSocketAdapter(ServerSocketChannelImpl aChannelImpl) throws IOException { |
| this.channelImpl = aChannelImpl; |
| } |
| |
| @Override public Socket accept() throws IOException { |
| if (!isBound()) { |
| throw new IllegalBlockingModeException(); |
| } |
| SocketChannel sc = channelImpl.accept(); |
| if (sc == null) { |
| throw new IllegalBlockingModeException(); |
| } |
| return sc.socket(); |
| } |
| |
| public Socket implAccept(SocketChannelImpl clientSocketChannel) throws IOException { |
| Socket clientSocket = clientSocketChannel.socket(); |
| boolean connectOK = false; |
| try { |
| synchronized (this) { |
| super.implAccept(clientSocket); |
| |
| // Sync the client socket's associated channel state with the Socket and OS. |
| InetSocketAddress remoteAddress = |
| new InetSocketAddress( |
| clientSocket.getInetAddress(), clientSocket.getPort()); |
| clientSocketChannel.onAccept(remoteAddress, false /* updateSocketState */); |
| } |
| connectOK = true; |
| } finally { |
| if (!connectOK) { |
| clientSocket.close(); |
| } |
| } |
| return clientSocket; |
| } |
| |
| @Override public ServerSocketChannel getChannel() { |
| return channelImpl; |
| } |
| |
| @Override public void close() throws IOException { |
| synchronized (channelImpl) { |
| super.close(); |
| if (channelImpl.isOpen()) { |
| channelImpl.close(); |
| } |
| } |
| } |
| |
| private FileDescriptor getFD$() { |
| return super.getImpl$().getFD$(); |
| } |
| } |
| } |