| /* |
| * 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 org.apache.harmony.nio.internal; |
| |
| // BEGIN android-note |
| // Copied from a newer version of Harmony. |
| // END android-note |
| |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.net.SocketAddress; |
| import java.net.SocketImpl; |
| 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 org.apache.harmony.luni.net.NetUtil; |
| import org.apache.harmony.luni.net.PlainServerSocketImpl; |
| import org.apache.harmony.luni.platform.FileDescriptorHandler; |
| import org.apache.harmony.luni.platform.Platform; |
| |
| /* |
| * The default implementation class of java.nio.channels.ServerSocketChannel. |
| */ |
| public class ServerSocketChannelImpl extends ServerSocketChannel implements |
| FileDescriptorHandler { |
| |
| // status un-init, not initialized. |
| private static final int SERVER_STATUS_UNINIT = -1; |
| |
| // status after open and before closed. |
| private static final int SERVER_STATUS_OPEN = 0; |
| |
| // status closed. |
| private static final int SERVER_STATUS_CLOSED = 1; |
| |
| // The fd to interact with native code |
| private final FileDescriptor fd; |
| |
| // The internal ServerSocket |
| private final ServerSocket socket; |
| |
| private final SocketImpl impl; |
| |
| int status = SERVER_STATUS_UNINIT; |
| |
| // whether the socket is bound |
| boolean isBound = false; |
| |
| // lock for accept |
| private static class AcceptLock {} |
| private final Object acceptLock = new AcceptLock(); |
| |
| /* |
| * Constructor |
| */ |
| public ServerSocketChannelImpl(SelectorProvider sp) throws IOException { |
| super(sp); |
| status = SERVER_STATUS_OPEN; |
| fd = new FileDescriptor(); |
| Platform.getNetworkSystem().createStreamSocket(fd, |
| NetUtil.preferIPv4Stack()); |
| impl = new PlainServerSocketImpl(fd); |
| socket = new ServerSocketAdapter(impl, this); |
| } |
| |
| // for native call |
| @SuppressWarnings("unused") |
| private ServerSocketChannelImpl() throws IOException { |
| super(SelectorProvider.provider()); |
| status = SERVER_STATUS_OPEN; |
| fd = new FileDescriptor(); |
| impl = new PlainServerSocketImpl(fd); |
| socket = new ServerSocketAdapter(impl, this); |
| isBound = false; |
| } |
| |
| /* |
| * Getting the internal Socket If we have not the socket, we create a new |
| * one. |
| */ |
| public ServerSocket socket() { |
| return socket; |
| } |
| |
| /* |
| * |
| * @see java.nio.channels.ServerSocketChannel#accept() |
| */ |
| public SocketChannel accept() throws IOException { |
| if (!isOpen()) { |
| throw new ClosedChannelException(); |
| } |
| if (!isBound) { |
| throw new NotYetBoundException(); |
| } |
| |
| SocketChannel sockChannel = new SocketChannelImpl(SelectorProvider.provider(), false); |
| Socket socketGot = sockChannel.socket(); |
| |
| try { |
| begin(); |
| |
| synchronized (acceptLock) { |
| synchronized (blockingLock()) { |
| boolean isBlocking = isBlocking(); |
| if (!isBlocking) { |
| // for non blocking mode, use select to see whether |
| // there are any pending connections. |
| int[] tryResult = Platform.getNetworkSystem().select( |
| new FileDescriptor[] { this.fd }, |
| new FileDescriptor[0], 0); |
| if (0 == tryResult.length || 0 == tryResult[0]) { |
| // no pending connections, returns immediately. |
| return null; |
| } |
| } |
| // do accept. |
| do { |
| try { |
| ((ServerSocketAdapter) socket).accept(socketGot, |
| (SocketChannelImpl) sockChannel); |
| // select successfully, break out immediately. |
| break; |
| } catch (SocketTimeoutException e) { |
| // continue to accept if the channel is in blocking |
| // mode. |
| } |
| } while (isBlocking); |
| } |
| } |
| } finally { |
| end(socketGot.isConnected()); |
| } |
| return sockChannel; |
| } |
| |
| /* |
| * @see java.nio.channels.spi.AbstractSelectableChannel#implConfigureBlocking |
| * |
| * (boolean) |
| */ |
| protected void implConfigureBlocking(boolean blockingMode) |
| throws IOException { |
| // Do nothing here. For real accept() operation in nonblocking mode, |
| // it uses INetworkSystem.select. Whether a channel is blocking can be |
| // decided by isBlocking() method. |
| } |
| |
| /* |
| * |
| * @see java.nio.channels.spi.AbstractSelectableChannel#implCloseSelectableChannel() |
| */ |
| synchronized protected void implCloseSelectableChannel() throws IOException { |
| status = SERVER_STATUS_CLOSED; |
| if (!socket.isClosed()) { |
| socket.close(); |
| } |
| } |
| |
| /* |
| * Gets the FileDescriptor |
| */ |
| public FileDescriptor getFD() { |
| return fd; |
| } |
| |
| /* |
| * The adapter class of ServerSocket. |
| */ |
| private class ServerSocketAdapter extends ServerSocket { |
| /* |
| * The related ServerSocketChannel. |
| */ |
| ServerSocketChannelImpl channelImpl; |
| |
| /* |
| * The Constructor. |
| */ |
| ServerSocketAdapter(SocketImpl impl, |
| ServerSocketChannelImpl aChannelImpl) { |
| super(impl); |
| this.channelImpl = aChannelImpl; |
| } |
| |
| /* |
| * |
| * @see java.net.ServerSocket#bind(java.net.SocketAddress, int) |
| */ |
| public void bind(SocketAddress localAddr, int backlog) |
| throws IOException { |
| super.bind(localAddr, backlog); |
| channelImpl.isBound = true; |
| } |
| |
| /* |
| * @see java.net.ServerSocket#accept() |
| * |
| * If the channel is in non-blocking mode and there is no connection |
| * ready to be accepted, invoking this method will cause an |
| * IllegalBlockingModeException. |
| */ |
| public Socket accept() throws IOException { |
| if (!isBound) { |
| throw new IllegalBlockingModeException(); |
| } |
| SocketChannel sc = channelImpl.accept(); |
| if (null == sc) { |
| throw new IllegalBlockingModeException(); |
| } |
| return sc.socket(); |
| } |
| |
| /* |
| * do the accept. |
| */ |
| private Socket accept(Socket aSocket, SocketChannelImpl sockChannel) |
| throws IOException { |
| // a new socket is pass in so we do not need to "Socket aSocket = |
| // new Socket();" |
| boolean connectOK = false; |
| try { |
| synchronized (this) { |
| super.implAccept(aSocket); |
| sockChannel.setConnected(); |
| sockChannel.setBound(true); |
| } |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| sm.checkAccept(aSocket.getInetAddress().getHostAddress(), |
| aSocket.getPort()); |
| } |
| connectOK = true; |
| } finally { |
| if (!connectOK) { |
| aSocket.close(); |
| } |
| } |
| return aSocket; |
| } |
| |
| /* |
| * getting internal channel. |
| */ |
| public ServerSocketChannel getChannel() { |
| return channelImpl; |
| } |
| |
| /* |
| * |
| * @see java.net.ServerSocket#isBound() |
| */ |
| public boolean isBound() { |
| return channelImpl.isBound; |
| } |
| |
| /* |
| * |
| * @see java.net.ServerSocket#bind(java.net.SocketAddress) |
| */ |
| public void bind(SocketAddress localAddr) throws IOException { |
| super.bind(localAddr); |
| channelImpl.isBound = true; |
| } |
| |
| /* |
| * @see java.net.ServerSocket#close() |
| */ |
| public void close() throws IOException { |
| synchronized (channelImpl) { |
| if (channelImpl.isOpen()) { |
| channelImpl.close(); |
| } else { |
| super.close(); |
| } |
| channelImpl.status = SERVER_STATUS_CLOSED; |
| } |
| } |
| } |
| } |