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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.
*/
// -=- ConnectingDialog.cxx
#include <stdlib.h>
#include <vncviewer/ConnectingDialog.h>
#include <vncviewer/resource.h>
#include <network/TcpSocket.h>
#include <rfb/Threading.h>
#include <rfb/Hostname.h>
#include <map>
using namespace rfb;
using namespace rfb::win32;
// ConnectingDialog callback
static BOOL CALLBACK ConnectingDlgProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) {
bool* activePtr = (bool*)GetWindowLong(hwnd, GWL_USERDATA);
switch (uMsg) {
case WM_INITDIALOG:
SetWindowLong(hwnd, GWL_USERDATA, lParam);
return TRUE;
case WM_COMMAND:
switch (LOWORD(wParam)) {
case IDCANCEL:
if (activePtr)
*activePtr = false;
return TRUE;
}
break;
case WM_DESTROY:
if (activePtr)
*activePtr = false;
return TRUE;
}
return 0;
}
// Global map, used by ConnectingDialog::Threads to call back to their owning
// ConnectingDialogs, while coping with the fact that the owner may already have quit.
static std::map<int, ConnectingDialog*> dialogs;
static int nextDialogId = 0;
static Mutex dialogsLock;
// ConnectingDialog::Thread
// Attempts to connect to the specified host. If the connection succeeds, the
// socket is saved in the owning ConnectingDialog, if still available, and the
// event is signalled. If the connection fails, the Exception text is returned
// to the dialog. If the dialog is already gone, the Exception/socket are discarded.
// NB: This thread class cleans itself up on exit - DO NOT join()!
class ConnectingDialog::Thread : public rfb::Thread {
public:
Thread(int dialogId_, const char* hostAndPort) : dialogId(dialogId_) {
setDeleteAfterRun();
getHostAndPort(hostAndPort, &host.buf, &port);
}
virtual void run() {
try {
returnSock(new network::TcpSocket(host.buf, port));
} catch (rdr::Exception& e) {
returnException(e);
}
}
void returnSock(network::Socket* s) {
Lock l(dialogsLock);
if (dialogs.count(dialogId)) {
dialogs[dialogId]->newSocket = s;
SetEvent(dialogs[dialogId]->readyEvent);
} else {
delete s;
}
}
void returnException(const rdr::Exception& e) {
Lock l(dialogsLock);
if (dialogs.count(dialogId)) {
dialogs[dialogId]->errMsg.replaceBuf(strDup(e.str()));
SetEvent(dialogs[dialogId]->readyEvent);
}
};
CharArray host;
int port;
int dialogId;
};
ConnectingDialog::ConnectingDialog() : dialog(0), newSocket(0),
readyEvent(CreateEvent(0, TRUE, FALSE, 0)), dialogId(0) {
}
network::Socket* ConnectingDialog::connect(const char* hostAndPort) {
Thread* connectThread = 0;
bool active = true;
errMsg.replaceBuf(0);
newSocket = 0;
// Get a unique dialog identifier and create the dialog window
{
Lock l(dialogsLock);
dialogId = ++nextDialogId;
dialogs[dialogId] = this;
dialog = CreateDialogParam(GetModuleHandle(0),
MAKEINTRESOURCE(IDD_CONNECTING_DLG), 0, &ConnectingDlgProc, (long)&active);
ShowWindow(dialog, SW_SHOW);
ResetEvent(readyEvent);
}
// Create and start the connection thread
try {
connectThread = new Thread(dialogId, hostAndPort);
connectThread->start();
} catch (rdr::Exception& e) {
errMsg.replaceBuf(strDup(e.str()));
active = false;
}
// Process window messages until the connection thread signals readyEvent, or the dialog is cancelled
while (active && (MsgWaitForMultipleObjects(1, &readyEvent.h, FALSE, INFINITE, QS_ALLINPUT) == WAIT_OBJECT_0 + 1)) {
MSG msg;
while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
DispatchMessage(&msg);
}
// Remove this dialog from the table
// NB: If the dialog was cancelled then the thread is still running, and will only
// discover that we're gone when it looks up our unique Id in the dialog table.
{
Lock l(dialogsLock);
dialogs.erase(dialogId);
}
// Close the dialog window
DestroyWindow(dialog); dialog=0;
// Throw the exception, if there was one
if (errMsg.buf)
throw rdr::Exception(errMsg.buf);
// Otherwise, return the socket
// NB: The socket will be null if the dialog was cancelled
return newSocket;
}
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