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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* 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 com.tigervnc.rdr.FdInStream;
import com.tigervnc.rdr.FdOutStream;
import com.tigervnc.rdr.Exception;
import com.tigervnc.rfb.LogWriter;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.UnknownHostException;
import java.nio.*;
import java.nio.channels.*;
public class TcpSocket extends Socket {
// -=- Socket initialisation
public static boolean socketsInitialised = false;
public static void initSockets() {
if (socketsInitialised)
return;
socketsInitialised = true;
}
// -=- TcpSocket
public TcpSocket(SocketDescriptor sock, boolean close) {
super(new FdInStream(sock), new FdOutStream(sock), true);
closeFd = close;
}
public TcpSocket(SocketDescriptor sock) {
this(sock, true);
}
public TcpSocket(String host, int port) throws Exception {
closeFd = true;
SocketDescriptor sock = null;
InetAddress addr = null;
boolean result = false;
// - Create a socket
initSockets();
try {
addr = java.net.InetAddress.getByName(host);
} catch(UnknownHostException e) {
throw new Exception("unable to resolve host by name: "+e.toString());
}
try {
sock = new SocketDescriptor();
} catch(Exception e) {
throw new SocketException("unable to create socket: "+e.toString());
}
/* Attempt to connect to the remote host */
try {
result = sock.connect(new InetSocketAddress(addr, port));
} catch(java.io.IOException e) {
throw new SocketException("unable to connect:"+e.getMessage());
}
if (!result && sock.isConnectionPending()) {
while (!result) {
try {
result = sock.finishConnect();
} catch(java.io.IOException e) {
throw new Exception(e.getMessage());
}
}
}
if (!result)
throw new SocketException("unable connect to socket");
// Disable Nagle's algorithm, to reduce latency
enableNagles(sock, false);
// Create the input and output streams
instream = new FdInStream(sock);
outstream = new FdOutStream(sock);
ownStreams = true;
}
protected void finalize() throws Exception {
if (closeFd)
try {
((SocketDescriptor)getFd()).close();
} catch (IOException e) {
throw new Exception(e.getMessage());
}
}
public int getMyPort() {
return getSockPort();
}
public String getPeerAddress() {
InetAddress peer = ((SocketDescriptor)getFd()).socket().getInetAddress();
if (peer != null)
return peer.getHostAddress();
return "";
}
public String getPeerName() {
InetAddress peer = ((SocketDescriptor)getFd()).socket().getInetAddress();
if (peer != null)
return peer.getHostName();
return "";
}
public int getPeerPort() {
int port = ((SocketDescriptor)getFd()).socket().getPort();
return port;
}
public String getPeerEndpoint() {
String address = getPeerAddress();
int port = getPeerPort();
return address+"::"+port;
}
public boolean sameMachine() throws Exception {
try {
SocketAddress peeraddr = ((SocketDescriptor)getFd()).getRemoteAddress();
SocketAddress myaddr = ((SocketDescriptor)getFd()).getLocalAddress();
return myaddr.equals(peeraddr);
} catch (IOException e) {
throw new Exception(e.getMessage());
}
}
public void shutdown() throws Exception {
super.shutdown();
try {
((SocketDescriptor)getFd()).shutdown();
} catch (IOException e) {
throw new Exception(e.getMessage());
}
}
public void close() throws IOException {
((SocketDescriptor)getFd()).close();
}
public static boolean enableNagles(SocketDescriptor sock, boolean enable) {
try {
sock.channel.socket().setTcpNoDelay(!enable);
} catch(java.net.SocketException e) {
vlog.error("unable to setsockopt TCP_NODELAY: "+e.getMessage());
return false;
}
return true;
}
public static boolean isSocket(java.net.Socket sock) {
return sock.getClass().toString().equals("com.tigervnc.net.Socket");
}
public boolean isConnected() {
return ((SocketDescriptor)getFd()).isConnected();
}
public int getSockPort() {
return ((SocketDescriptor)getFd()).socket().getLocalPort();
}
/* Tunnelling support. */
public static int findFreeTcpPort() {
java.net.ServerSocket sock;
int port;
try {
sock = new java.net.ServerSocket(0);
port = sock.getLocalPort();
sock.close();
} catch (java.io.IOException e) {
throw new SocketException("unable to create socket: "+e.toString());
}
return port;
}
private boolean closeFd;
static LogWriter vlog = new LogWriter("TcpSocket");
}
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