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- /* Copyright (C) 2012 Brian P. Hinz
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- */
- package com.tigervnc.network;
-
- import java.io.IOException;
-
- import java.net.SocketAddress;
- import java.nio.*;
- import java.nio.channels.*;
- import java.nio.channels.spi.SelectorProvider;
-
- import java.util.Set;
- import java.util.Iterator;
-
- import com.tigervnc.rdr.Exception;
-
- public class SocketDescriptor implements FileDescriptor {
-
- public SocketDescriptor() throws Exception {
- DefaultSelectorProvider();
- try {
- channel = SocketChannel.open();
- channel.configureBlocking(false);
- writeSelector = Selector.open();
- readSelector = Selector.open();
- } catch (IOException e) {
- throw new Exception(e.getMessage());
- }
- try {
- channel.register(writeSelector, SelectionKey.OP_WRITE);
- channel.register(readSelector, SelectionKey.OP_READ);
- } catch (java.nio.channels.ClosedChannelException e) {
- throw new Exception(e.getMessage());
- }
- }
-
- public void shutdown() throws IOException {
- try {
- channel.socket().shutdownInput();
- channel.socket().shutdownOutput();
- } catch(IOException e) {
- throw new IOException(e.getMessage());
- }
- }
-
- public void close() throws IOException {
- try {
- channel.close();
- } catch(IOException e) {
- throw new IOException(e.getMessage());
- }
- }
-
- private static SelectorProvider DefaultSelectorProvider() {
- // kqueue() selector provider on OS X is not working, fall back to select() for now
- String os = System.getProperty("os.name");
- if (os.startsWith("Mac OS X"))
- System.setProperty("java.nio.channels.spi.SelectorProvider","sun.nio.ch.PollSelectorProvider");
- return SelectorProvider.provider();
- }
-
- synchronized public int select(int interestOps, Integer timeout) throws Exception {
- int n;
- Selector selector;
- if ((interestOps & SelectionKey.OP_READ) != 0) {
- selector = readSelector;
- } else {
- selector = writeSelector;
- }
- selector.selectedKeys().clear();
- try {
- if (timeout == null) {
- n = selector.select();
- } else {
- int tv = timeout.intValue();
- switch(tv) {
- case 0:
- n = selector.selectNow();
- break;
- default:
- n = selector.select((long)tv);
- break;
- }
- }
- } catch (java.io.IOException e) {
- throw new Exception(e.getMessage());
- }
- return n;
- }
-
- public int write(ByteBuffer buf, int len) throws Exception {
- try {
- int n = channel.write((ByteBuffer)buf.slice().limit(len));
- buf.position(buf.position()+n);
- return n;
- } catch (java.io.IOException e) {
- throw new Exception(e.getMessage());
- }
- }
-
- public int read(ByteBuffer buf, int len) throws Exception {
- try {
- int n = channel.read((ByteBuffer)buf.slice().limit(len));
- buf.position(buf.position()+n);
- return (n < 0) ? 0 : n;
- } catch (java.lang.Exception e) {
- throw new Exception(e.getMessage());
- }
- }
-
- public java.net.Socket socket() {
- return channel.socket();
- }
-
- public SocketAddress getRemoteAddress() throws IOException {
- if (isConnected())
- return channel.socket().getRemoteSocketAddress();
- return null;
- }
-
- public SocketAddress getLocalAddress() throws IOException {
- if (isConnected())
- return channel.socket().getLocalSocketAddress();
- return null;
- }
-
- public boolean isConnectionPending() {
- return channel.isConnectionPending();
- }
-
- public boolean connect(SocketAddress remote) throws IOException {
- return channel.connect(remote);
- }
-
- public boolean finishConnect() throws IOException {
- return channel.finishConnect();
- }
-
- public boolean isConnected() {
- return channel.isConnected();
- }
-
- protected void setChannel(SocketChannel channel_) {
- try {
- if (channel != null)
- channel.close();
- if (readSelector != null)
- readSelector.close();
- if (writeSelector != null)
- writeSelector.close();
- channel = channel_;
- channel.configureBlocking(false);
- writeSelector = Selector.open();
- readSelector = Selector.open();
- } catch (java.io.IOException e) {
- throw new Exception(e.getMessage());
- }
- try {
- channel.register(writeSelector, SelectionKey.OP_WRITE);
- channel.register(readSelector, SelectionKey.OP_READ);
- } catch (java.nio.channels.ClosedChannelException e) {
- System.out.println(e.toString());
- }
- }
-
- protected SocketChannel channel;
- protected Selector writeSelector;
- protected Selector readSelector;
-
- }
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