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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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