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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
// -=- CConnThread.cxx
// A CConnThread instance is created for each new connection.
// The CConnThread creates the corresponding CConn instance
// and manages it.
#include <stdlib.h>
#include <rfb/LogWriter.h>
#include <rfb/Hostname.h>
#include <rfb_win32/MsgBox.h>
#include <network/TcpSocket.h>
#include <vncviewer/CConnThread.h>
#include <vncviewer/CConn.h>
#include <vncviewer/ConnectionDialog.h>
#include <vncviewer/ConnectingDialog.h>
#include <vncviewer/UserPasswdDialog.h>
#include <set>
using namespace rfb;
using namespace win32;
static LogWriter vlog("CConnThread");
static std::set<CConnThread*> threads;
static Mutex threadsLock;
static Handle noMoreThreads(CreateEvent(0, TRUE, FALSE, 0));
CConnThread::CConnThread() : Thread("CConnThread"), isConfig(false),
sock(0), reverse(false) {
vlog.info("CConnThread (dialog)");
setDeleteAfterRun();
Lock l(threadsLock);
threads.insert(this);
start();
}
CConnThread::CConnThread(const char* hostOrConfig_, bool isConfig_)
: Thread("CConnThread"), hostOrConfig(strDup(hostOrConfig_)),
isConfig(isConfig_), sock(0), reverse(false) {
vlog.info("CConnThread (host/port)");
setDeleteAfterRun();
Lock l(threadsLock);
threads.insert(this);
start();
}
CConnThread::CConnThread(network::Socket* sock_, bool reverse_)
: Thread("CConnThread"), isConfig(false), sock(sock_), reverse(reverse_) {
vlog.info("CConnThread (reverse connection)");
setDeleteAfterRun();
Lock l(threadsLock);
threads.insert(this);
start();
}
CConnThread::~CConnThread() {
Lock l(threadsLock);
threads.erase(this);
if (threads.empty())
SetEvent(noMoreThreads);
delete sock;
}
void CConnThread::run() {
CConnOptions options;
bool reconnect;
do {
{
CConn conn;
reconnect = false;
// If there is no socket object then set the host & port info
if (!sock && !options.host.buf) {
try {
if (isConfig) {
// A configuration file name was specified - load it
CharArray filename(hostOrConfig.takeBuf());
options.readFromFile(filename.buf);
} else {
// An actual hostname (and possibly port) was specified
options.host.replaceBuf(hostOrConfig.takeBuf());
}
if (!options.host.buf) {
// No host was specified - prompt for one
ConnectionDialog connDlg(&conn);
if (!connDlg.showDialog())
return;
options = conn.getOptions();
options.setHost(CStr(connDlg.hostname.buf));
}
} catch (rdr::Exception& e) {
MsgBox(0, TStr(e.str()), MB_ICONERROR | MB_OK);
return;
}
}
// Apply the connection options to the CConn
conn.applyOptions(options);
if (!sock) {
// There is no existing connection - better make one
const char* hostAndPort = conn.getOptions().host.buf;
try {
ConnectingDialog dlg;
sock = dlg.connect(hostAndPort);
// If the connection was cancelled by the user, just quit
if (!sock)
return;
} catch(rdr::Exception& e) {
MsgBox(NULL, TStr(e.str()), MB_ICONERROR | MB_OK);
return;
}
// Try to add the caller to the MRU
MRU::addToMRU(hostAndPort);
}
// Run the RFB protocol over the connected socket
conn.initialise(sock, reverse);
while (!conn.isClosed()) {
try {
conn.getInStream()->check(1,1);
conn.processMsg();
} catch (rdr::EndOfStream) {
if (conn.state() == CConnection::RFBSTATE_NORMAL)
conn.close();
else
conn.close("The connection closed unexpectedly");
} catch (rfb::AuthCancelledException) {
conn.close();
} catch (rfb::AuthFailureException& e) {
// Clear the password, in case we auto-reconnect
options = conn.getOptions();
options.password.replaceBuf(0);
conn.applyOptions(options);
conn.close(e.str());
} catch (rdr::Exception& e) {
conn.close(e.str());
}
}
// If there is a cause for closing the connection logged then display it
if (conn.closeReason()) {
reconnect = !reverse && conn.getOptions().autoReconnect;
if (!reconnect) {
MsgBox(0, TStr(conn.closeReason()), MB_ICONINFORMATION | MB_OK);
} else {
options = conn.getOptions();
const char* format = "%s\nDo you wish to attempt to reconnect to %s?";
CharArray message(strlen(conn.closeReason()) + strlen(format) +
strlen(conn.getOptions().host.buf));
sprintf(message.buf, format, conn.closeReason(), conn.getOptions().host.buf);
if (MsgBox(0, TStr(message.buf), MB_ICONQUESTION | MB_YESNO | MB_DEFBUTTON2) != IDYES)
reconnect = false;
}
}
} // Exit the CConn's scope, implicitly destroying it & making it safe to delete the TcpSocket
// Clean up the old socket, if any
delete sock; sock = 0;
} while (reconnect);
}
BOOL CConnThread::getMessage(MSG* msg, HWND hwnd, UINT minMsg, UINT maxMsg) {
while (!PeekMessage(msg, hwnd, minMsg, maxMsg, PM_REMOVE)) {
DWORD result = MsgWaitForMultipleObjects(1, &noMoreThreads.h, FALSE, INFINITE, QS_ALLINPUT);
if (result == WAIT_OBJECT_0)
return FALSE;
else if (result == WAIT_FAILED)
throw rdr::SystemException("CConnThread::getMessage wait failed", GetLastError());
}
return msg->message != WM_QUIT;
}
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