PrinterSetupWizardSheet.cpp   [plain text]

/* -*- Mode: C; tab-width: 4 -*-
 *
 * Copyright (c) 1997-2004 Apple Computer, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.

    Change History (most recent first):
    
$Log: PrinterSetupWizardSheet.cpp,v $
Revision 1.35  2006/08/14 23:24:09  cheshire
Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0

Revision 1.34  2005/10/05 17:32:51  herscher
<rdar://problem/4141221> Use a case insensitive compare operation to check whether a printer with the same name has already been installed.

Revision 1.33  2005/07/11 20:17:15  shersche
<rdar://problem/4124524> UI fixes associated with CUPS printer workaround fix.

Revision 1.32  2005/07/07 17:53:20  shersche
Fix problems associated with the CUPS printer workaround fix.

Revision 1.31  2005/06/30 18:02:54  shersche
<rdar://problem/4124524> Workaround for Mac OS X Printer Sharing bug

Revision 1.30  2005/04/13 17:46:22  shersche
<rdar://problem/4082122> Generic PCL not selected when printers advertise multiple text records

Revision 1.29  2005/02/14 20:48:37  shersche
<rdar://problem/4003710> Default pdl key to "application/postscript"

Revision 1.28  2005/02/14 20:37:53  shersche
<rdar://problem/4003944> Populate comment field with the model name that users see in the wizard UI.

Revision 1.27  2005/02/09 05:04:03  shersche
<rdar://problem/3946587> Use TXTRecordGetValuePtr() API in ParseTextRecord

Revision 1.26  2005/02/08 21:45:06  shersche
<rdar://problem/3947490> Default to Generic PostScript or PCL if unable to match driver

Revision 1.25  2005/02/08 18:54:17  shersche
<rdar://problem/3987680> Default queue name is "lp" when rp key is not specified.

Revision 1.24  2005/02/01 02:15:55  shersche
<rdar://problem/3946587> Use TXTRecord parsing APIs in ParseTextRecord

Revision 1.23  2005/01/31 23:54:30  shersche
<rdar://problem/3947508> Start browsing when printer wizard starts. Move browsing logic from CSecondPage object to CPrinterSetupWizardSheet object.

Revision 1.22  2005/01/25 18:49:43  shersche
Get icon resources from resource DLL

Revision 1.21  2005/01/10 01:09:32  shersche
Use the "note" key to populate pLocation field when setting up printer

Revision 1.20  2005/01/03 19:05:01  shersche
Store pointer to instance of wizard sheet so that print driver install thread sends a window message to the correct window

Revision 1.19  2004/12/31 07:23:53  shersche
Don't modify the button setting in SetSelectedPrinter()

Revision 1.18  2004/12/29 18:53:38  shersche
<rdar://problem/3725106>
<rdar://problem/3737413> Added support for LPR and IPP protocols as well as support for obtaining multiple text records. Reorganized and simplified codebase.
Bug #: 3725106, 3737413

Revision 1.17  2004/10/12 18:02:53  shersche
<rdar://problem/3764873> Escape '/', '@', '"' characters in printui command.
Bug #: 3764873

Revision 1.16  2004/09/13 21:27:22  shersche
<rdar://problem/3796483> Pass the moreComing flag to OnAddPrinter and OnRemovePrinter callbacks
Bug #: 3796483

Revision 1.15  2004/09/11 05:59:06  shersche
<rdar://problem/3785766> Fix code that generates unique printer names based on currently installed printers
Bug #: 3785766

Revision 1.14  2004/09/02 01:57:58  cheshire
<rdar://problem/3783611> Fix incorrect testing of MoreComing flag

Revision 1.13  2004/07/26 21:06:29  shersche
<rdar://problem/3739200> Removing trailing '.' in hostname
Bug #: 3739200

Revision 1.12  2004/07/13 21:24:23  rpantos
Fix for <rdar://problem/3701120>.

Revision 1.11  2004/06/28 00:51:47  shersche
Move call to EnumPrinters out of browse callback into standalone function

Revision 1.10  2004/06/27 23:06:47  shersche
code cleanup, make sure EnumPrinters returns non-zero value

Revision 1.9  2004/06/27 15:49:31  shersche
clean up some cruft in the printer browsing code

Revision 1.8  2004/06/27 08:04:51  shersche
copy selected printer to prevent printer being deleted out from under

Revision 1.7  2004/06/26 23:27:12  shersche
support for installing multiple printers of the same name

Revision 1.6  2004/06/26 21:22:39  shersche
handle spaces in file names

Revision 1.5  2004/06/26 03:19:57  shersche
clean up warning messages

Submitted by: herscher

Revision 1.4  2004/06/25 02:26:52  shersche
Normalize key fields in text record entries
Submitted by: herscher

Revision 1.3  2004/06/24 20:12:07  shersche
Clean up source code
Submitted by: herscher

Revision 1.2  2004/06/23 17:58:21  shersche
<rdar://problem/3701837> eliminated memory leaks on exit
<rdar://problem/3701926> installation of a printer that is already installed results in a no-op
Bug #: 3701837, 3701926
Submitted by: herscher

Revision 1.1  2004/06/18 04:36:57  rpantos
First checked in


*/

#include "stdafx.h"
#include "PrinterSetupWizardApp.h"
#include "PrinterSetupWizardSheet.h"
#include "CommonServices.h"
#include "DebugServices.h"
#include "WinServices.h"
#include "About.h"
#include <winspool.h>
#include <tcpxcv.h>
#include <string>

// unreachable code
#pragma warning(disable:4702)


#if( !TARGET_OS_WINDOWS_CE )
#	include	<mswsock.h>
#	include	<process.h>
#endif

// Private Messages

#define WM_SOCKET_EVENT		( WM_USER + 0x100 )
#define WM_PROCESS_EVENT	( WM_USER + 0x101 )


// CPrinterSetupWizardSheet
CPrinterSetupWizardSheet * CPrinterSetupWizardSheet::m_self;

IMPLEMENT_DYNAMIC(CPrinterSetupWizardSheet, CPropertySheet)
CPrinterSetupWizardSheet::CPrinterSetupWizardSheet(UINT nIDCaption, CWnd* pParentWnd, UINT iSelectPage)
	:CPropertySheet(nIDCaption, pParentWnd, iSelectPage),
	m_selectedPrinter(NULL),
	m_driverThreadExitCode( 0 ),
	m_driverThreadFinished( false ),
	m_pdlBrowser( NULL ),
	m_ippBrowser( NULL ),
	m_lprBrowser( NULL ),
	m_lastPage( NULL )
{
	m_arrow		=	LoadCursor(0, IDC_ARROW);
	m_wait		=	LoadCursor(0, IDC_APPSTARTING);
	m_active	=	m_arrow;
	m_self		=	this;
	
	Init();

	LoadPrinterNames();
}


CPrinterSetupWizardSheet::~CPrinterSetupWizardSheet()
{
	Printer * printer;

	while ( m_printers.size() > 0 )
	{
		printer = m_printers.front();
		m_printers.pop_front();

		delete printer;
	}

	m_self = NULL;
}


// ------------------------------------------------------
// SetSelectedPrinter
//
// Manages setting a printer as the printer to install.  Stops
// any pending resolves.  
//	
void
CPrinterSetupWizardSheet::SetSelectedPrinter(Printer * printer)
{
	check( !printer || ( printer != m_selectedPrinter ) );

	m_selectedPrinter = printer;
}


OSStatus
CPrinterSetupWizardSheet::LoadPrinterNames()
{
	PBYTE		buffer	=	NULL;
	OSStatus	err		= 0;

	//
	// rdar://problem/3701926 - Printer can't be installed twice
	//
	// First thing we want to do is make sure the printer isn't already installed.
	// If the printer name is found, we'll try and rename it until we
	// find a unique name
	//
	DWORD dwNeeded = 0, dwNumPrinters = 0;

	BOOL ok = EnumPrinters(PRINTER_ENUM_LOCAL, NULL, 4, NULL, 0, &dwNeeded, &dwNumPrinters);
	err = translate_errno( ok, errno_compat(), kUnknownErr );

	if ((err == ERROR_INSUFFICIENT_BUFFER) && (dwNeeded > 0))
	{
		try
		{
			buffer = new unsigned char[dwNeeded];
		}
		catch (...)
		{
			buffer = NULL;
		}
	
		require_action( buffer, exit, kNoMemoryErr );
		ok = EnumPrinters(PRINTER_ENUM_LOCAL, NULL, 4, buffer, dwNeeded, &dwNeeded, &dwNumPrinters);
		err = translate_errno( ok, errno_compat(), kUnknownErr );
		require_noerr( err, exit );

		for (DWORD index = 0; index < dwNumPrinters; index++)
		{
			PRINTER_INFO_4 * lppi4 = (PRINTER_INFO_4*) (buffer + index * sizeof(PRINTER_INFO_4));

			m_printerNames.push_back( lppi4->pPrinterName );
		}
	}

exit:

	if (buffer != NULL)
	{
		delete [] buffer;
	}

	return err;
}



// ------------------------------------------------------
// InstallPrinter
//
// Installs a printer with Windows.
//
// NOTE: this works one of two ways, depending on whether
// there are drivers already installed for this printer.
// If there are, then we can just create a port with XcvData,
// and then call AddPrinter.  If not, we use the printui.dll
// to install the printer. Actually installing drivers that
// are not currently installed is painful, and it's much
// easier and less error prone to just let printui.dll do
// the hard work for us.
//	

OSStatus
CPrinterSetupWizardSheet::InstallPrinter(Printer * printer)
{
	Service	*	service;
	BOOL		ok;
	OSStatus	err;

	service = printer->services.front();
	check( service );

	//
	// if the driver isn't installed, then install it
	//

	if ( !printer->driverInstalled )
	{
		DWORD		dwResult;
		HANDLE		hThread;
		unsigned	threadID;

		m_driverThreadFinished = false;
	
		//
		// create the thread
		//
		hThread = (HANDLE) _beginthreadex_compat( NULL, 0, InstallDriverThread, printer, 0, &threadID );
		err = translate_errno( hThread, (OSStatus) GetLastError(), kUnknownErr );
		require_noerr( err, exit );
			
		//
		// go modal
		//
		while (!m_driverThreadFinished)
		{
			MSG msg;
	
			GetMessage( &msg, m_hWnd, 0, 0 );
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	
		//
		// Wait until child process exits.
		//
		dwResult = WaitForSingleObject( hThread, INFINITE );
		err = translate_errno( dwResult == WAIT_OBJECT_0, errno_compat(), err = kUnknownErr );
		require_noerr( err, exit );

		//
		// check the return value of thread
		//
		require_noerr( m_driverThreadExitCode, exit );

		//
		// now we know that the driver was successfully installed
		//
		printer->driverInstalled = true;
	}

	if ( service->type == kPDLServiceType )
	{
		err = InstallPrinterPDLAndLPR( printer, service, PROTOCOL_RAWTCP_TYPE );
		require_noerr( err, exit );
	}
	else if ( service->type == kLPRServiceType )
	{
		err = InstallPrinterPDLAndLPR( printer, service, PROTOCOL_LPR_TYPE );
		require_noerr( err, exit );
	}
	else if ( service->type == kIPPServiceType )
	{
		err = InstallPrinterIPP( printer, service );
		require_noerr( err, exit );
	}
	else
	{
		err = kUnknownErr;
		require_noerr( err, exit );
	}

	printer->installed = true;

	//
	// if the user specified a default printer, set it
	//
	if (printer->deflt)
	{
		ok = SetDefaultPrinter( printer->actualName );
		err = translate_errno( ok, errno_compat(), err = kUnknownErr );
		require_noerr( err, exit );
	}

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::InstallPrinterPDLAndLPR(Printer * printer, Service * service, DWORD protocol )
{
	PRINTER_DEFAULTS	printerDefaults =	{ NULL,  NULL, SERVER_ACCESS_ADMINISTER };
	DWORD				dwStatus;
	DWORD				cbInputData		=	100;
	PBYTE				pOutputData		=	NULL;
	DWORD				cbOutputNeeded	=	0;
	PORT_DATA_1			portData;
	PRINTER_INFO_2		pInfo;
	HANDLE				hXcv			=	NULL;
	HANDLE				hPrinter		=	NULL;
	Queue			*	q;
	BOOL				ok;
	OSStatus			err;

	check(printer != NULL);
	check(printer->installed == false);

	q = service->queues.front();
	check( q );

	ok = OpenPrinter(L",XcvMonitor Standard TCP/IP Port", &hXcv, &printerDefaults);
	err = translate_errno( ok, errno_compat(), kUnknownErr );
	require_noerr( err, exit );

	//
	// BUGBUG: MSDN said this is not required, but my experience shows it is required
	//
	try
	{
		pOutputData = new BYTE[cbInputData];
	}
	catch (...)
	{
		pOutputData = NULL;
	}

	require_action( pOutputData, exit, err = kNoMemoryErr );
	
	//
	// setup the port
	//
	ZeroMemory(&portData, sizeof(PORT_DATA_1));
	wcscpy(portData.sztPortName, printer->portName);
    	
	portData.dwPortNumber	=	service->portNumber;
	portData.dwVersion		=	1;
    	
	portData.dwProtocol	= protocol;
	portData.cbSize		= sizeof PORT_DATA_1;
	portData.dwReserved	= 0L;
    	
	wcscpy(portData.sztQueue, q->name);
	wcscpy(portData.sztIPAddress, service->hostname); 
	wcscpy(portData.sztHostAddress, service->hostname);

	ok = XcvData(hXcv, L"AddPort", (PBYTE) &portData, sizeof(PORT_DATA_1), pOutputData, cbInputData,  &cbOutputNeeded, &dwStatus);
	err = translate_errno( ok, errno_compat(), kUnknownErr );
	require_noerr( err, exit );

	//
	// add the printer
	//
	ZeroMemory(&pInfo, sizeof(pInfo));
		
	pInfo.pPrinterName			=	printer->actualName.GetBuffer();
	pInfo.pServerName			=	NULL;
	pInfo.pShareName			=	NULL;
	pInfo.pPortName				=	printer->portName.GetBuffer();
	pInfo.pDriverName			=	printer->modelName.GetBuffer();
	pInfo.pComment				=	printer->displayModelName.GetBuffer();
	pInfo.pLocation				=	q->location.GetBuffer();
	pInfo.pDevMode				=	NULL;
	pInfo.pDevMode				=	NULL;
	pInfo.pSepFile				=	L"";
	pInfo.pPrintProcessor		=	L"winprint";
	pInfo.pDatatype				=	L"RAW";
	pInfo.pParameters			=	L"";
	pInfo.pSecurityDescriptor	=	NULL;
	pInfo.Attributes			=	PRINTER_ATTRIBUTE_QUEUED;
	pInfo.Priority				=	0;
	pInfo.DefaultPriority		=	0;
	pInfo.StartTime				=	0;
	pInfo.UntilTime				=	0;

	hPrinter = AddPrinter(NULL, 2, (LPBYTE) &pInfo);
	err = translate_errno( hPrinter, errno_compat(), kUnknownErr );
	require_noerr( err, exit );

exit:

	if (hPrinter != NULL)
	{
		ClosePrinter(hPrinter);
	}

	if (hXcv != NULL)
	{
		ClosePrinter(hXcv);
	}

	if (pOutputData != NULL)
	{
		delete [] pOutputData;
	}

	return err;
}


OSStatus
CPrinterSetupWizardSheet::InstallPrinterIPP(Printer * printer, Service * service)
{
	DEBUG_UNUSED( service );

	Queue		*	q		 = service->SelectedQueue();
	HANDLE			hPrinter = NULL;
	PRINTER_INFO_2	pInfo;
	OSStatus		err;

	check( q );
	
	//
	// add the printer
	//
	ZeroMemory(&pInfo, sizeof(PRINTER_INFO_2));
	
	pInfo.pPrinterName		= printer->actualName.GetBuffer();
	pInfo.pPortName			= printer->portName.GetBuffer();
	pInfo.pDriverName		= printer->modelName.GetBuffer();
	pInfo.pPrintProcessor	= L"winprint";
	pInfo.pLocation			= q->location.GetBuffer();
	pInfo.pComment			= printer->displayModelName.GetBuffer();
	pInfo.Attributes		= PRINTER_ATTRIBUTE_NETWORK | PRINTER_ATTRIBUTE_LOCAL;
	
	hPrinter = AddPrinter(NULL, 2, (LPBYTE)&pInfo);
	err = translate_errno( hPrinter, errno_compat(), kUnknownErr );
	require_noerr( err, exit );

exit:

	if ( hPrinter != NULL )
	{
		ClosePrinter(hPrinter);
	}

	return err;
}


BEGIN_MESSAGE_MAP(CPrinterSetupWizardSheet, CPropertySheet)
ON_MESSAGE( WM_SOCKET_EVENT, OnSocketEvent )
ON_MESSAGE( WM_PROCESS_EVENT, OnProcessEvent )
ON_WM_SETCURSOR()
ON_WM_TIMER()
END_MESSAGE_MAP()


// ------------------------------------------------------
// OnCommand
//
// Traps when the user hits Finish  
//	
BOOL CPrinterSetupWizardSheet::OnCommand(WPARAM wParam, LPARAM lParam)
{
	//
	// Check if this is OK
	//
	if (wParam == ID_WIZFINISH)              // If OK is hit...
	{
		OnOK();
	}
 
	return CPropertySheet::OnCommand(wParam, lParam);
}


// ------------------------------------------------------
// OnInitDialog
//
// Initializes this Dialog object.
//	
BOOL CPrinterSetupWizardSheet::OnInitDialog()
{
	OSStatus err;
	
	CPropertySheet::OnInitDialog();

	err = StartBrowse();
	require_noerr( err, exit );

exit:

	if ( err )
	{
		StopBrowse();

		if ( err == kDNSServiceErr_Firewall )
		{
			CString text, caption;

			text.LoadString( IDS_FIREWALL );
			caption.LoadString( IDS_FIREWALL_CAPTION );

			MessageBox(text, caption, MB_OK|MB_ICONEXCLAMATION);
		}
		else
		{
			CPrinterSetupWizardSheet::WizardException exc;
			
			exc.text.LoadString( IDS_NO_MDNSRESPONDER_SERVICE_TEXT );
			exc.caption.LoadString( IDS_ERROR_CAPTION );
			
			throw(exc);
		}
	}

	return TRUE;
}


// ------------------------------------------------------
// OnSetCursor
//
// This is called when Windows wants to know what cursor
// to display.  So we tell it.  
//	
BOOL
CPrinterSetupWizardSheet::OnSetCursor(CWnd * pWnd, UINT nHitTest, UINT message)
{
	DEBUG_UNUSED(pWnd);
	DEBUG_UNUSED(nHitTest);
	DEBUG_UNUSED(message);

	SetCursor(m_active);
	return TRUE;
}


// ------------------------------------------------------
// OnContextMenu
//
// This is not fully implemented yet.  
//	

void
CPrinterSetupWizardSheet::OnContextMenu(CWnd * pWnd, CPoint pos)
{
	DEBUG_UNUSED(pWnd);
	DEBUG_UNUSED(pos);

	CAbout dlg;

	dlg.DoModal();
}


// ------------------------------------------------------
// OnOK
//
// This is called when the user hits the "Finish" button  
//	
void
CPrinterSetupWizardSheet::OnOK()
{
	check ( m_selectedPrinter != NULL );

	SetWizardButtons( PSWIZB_DISABLEDFINISH );

	if ( InstallPrinter( m_selectedPrinter ) != kNoErr )
	{
		CString caption;
		CString message;

		caption.LoadString(IDS_INSTALL_ERROR_CAPTION);
		message.LoadString(IDS_INSTALL_ERROR_MESSAGE);

		MessageBox(message, caption, MB_OK|MB_ICONEXCLAMATION);
	}

	StopBrowse();
}


// CPrinterSetupWizardSheet message handlers

void CPrinterSetupWizardSheet::Init(void)
{
	AddPage(&m_pgFirst);
	AddPage(&m_pgSecond);
	AddPage(&m_pgThird);
	AddPage(&m_pgFourth);

	m_psh.dwFlags &= (~PSH_HASHELP);

	m_psh.dwFlags |= PSH_WIZARD97|PSH_WATERMARK|PSH_HEADER;
	m_psh.pszbmWatermark = MAKEINTRESOURCE(IDB_WATERMARK);
	m_psh.pszbmHeader = MAKEINTRESOURCE(IDB_BANNER_ICON);

	m_psh.hInstance = GetNonLocalizedResources();

	SetWizardMode();
}


LONG
CPrinterSetupWizardSheet::OnSocketEvent(WPARAM inWParam, LPARAM inLParam)
{
	if (WSAGETSELECTERROR(inLParam) && !(HIWORD(inLParam)))
    {
		dlog( kDebugLevelError, "OnServiceEvent: window error\n" );
    }
    else
    {
		SOCKET sock = (SOCKET) inWParam;

		// iterate thru list
		ServiceRefList::iterator begin = m_serviceRefList.begin();
		ServiceRefList::iterator end   = m_serviceRefList.end();

		while (begin != end)
		{
			DNSServiceRef ref = *begin++;

			check(ref != NULL);

			if ((SOCKET) DNSServiceRefSockFD(ref) == sock)
			{
				DNSServiceProcessResult(ref);
				break;
			}
		}
	}

	return ( 0 );
}


LONG
CPrinterSetupWizardSheet::OnProcessEvent(WPARAM inWParam, LPARAM inLParam)
{
	DEBUG_UNUSED(inLParam);

	m_driverThreadExitCode	=	(DWORD) inWParam;
	m_driverThreadFinished	=	true;

	return 0;
}


unsigned WINAPI
CPrinterSetupWizardSheet::InstallDriverThread( LPVOID inParam )
{	
	Printer			*	printer = (Printer*) inParam;
	DWORD				exitCode = 0;
	DWORD				dwResult;
	OSStatus			err;
	STARTUPINFO			si;
	PROCESS_INFORMATION pi;
	BOOL				ok;

	check( printer );
	check( m_self );

	//
	// because we're calling endthreadex(), C++ objects won't be cleaned up
	// correctly.  we'll nest the CString 'command' inside a block so
	// that it's destructor will be invoked.
	//
	{
		CString command;

		ZeroMemory( &si, sizeof(si) );
		si.cb = sizeof(si);
		ZeroMemory( &pi, sizeof(pi) );

		command.Format(L"rundll32.exe printui.dll,PrintUIEntry /ia /m \"%s\" /f \"%s\"", (LPCTSTR) printer->modelName, (LPCTSTR) printer->infFileName );

		ok = CreateProcess(NULL, command.GetBuffer(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
		err = translate_errno( ok, errno_compat(), kUnknownErr );
		require_noerr( err, exit );

		dwResult = WaitForSingleObject( pi.hProcess, INFINITE );
		translate_errno( dwResult == WAIT_OBJECT_0, errno_compat(), err = kUnknownErr );
		require_noerr( err, exit );

		ok = GetExitCodeProcess( pi.hProcess, &exitCode );
		err = translate_errno( ok, errno_compat(), kUnknownErr );
		require_noerr( err, exit );
	}

exit:

	//
	// Close process and thread handles. 
	//
	if ( pi.hProcess )
	{
		CloseHandle( pi.hProcess );
	}

	if ( pi.hThread )
	{
		CloseHandle( pi.hThread );
	}

	//
	// alert the main thread
	//
	m_self->PostMessage( WM_PROCESS_EVENT, err, exitCode );

	_endthreadex_compat( 0 );

	return 0;
}


void DNSSD_API
CPrinterSetupWizardSheet::OnBrowse(
							DNSServiceRef 			inRef,
							DNSServiceFlags 		inFlags,
							uint32_t 				inInterfaceIndex,
							DNSServiceErrorType 	inErrorCode,
							const char *			inName,	
							const char *			inType,	
							const char *			inDomain,	
							void *					inContext )
{
	DEBUG_UNUSED(inRef);

	CPrinterSetupWizardSheet	*	self;
	bool							moreComing = (bool) (inFlags & kDNSServiceFlagsMoreComing);
	CPropertyPage				*	active;
	Printer						*	printer = NULL;
	Service						*	service = NULL;
	OSStatus						err = kNoErr;

	require_noerr( inErrorCode, exit );
	
	self = reinterpret_cast <CPrinterSetupWizardSheet*>( inContext );
	require_quiet( self, exit );

	active = self->GetActivePage();
	require_quiet( active, exit );

	// Have we seen this printer before?

	printer = self->Lookup( inName );

	if ( printer )
	{
		service = printer->LookupService( inType );
	}

	if ( inFlags & kDNSServiceFlagsAdd )
	{
		if (printer == NULL)
		{
			// If not, then create a new one

			printer = self->OnAddPrinter( inInterfaceIndex, inName, inType, inDomain, moreComing );
			require_action( printer, exit, err = kUnknownErr );
		}

		if ( !service )
		{
			err = self->OnAddService( printer, inInterfaceIndex, inName, inType, inDomain );
			require_noerr( err, exit );
		}
		else
		{
			service->refs++;
		}
	}
	else if ( printer )
	{
		check( service );

		err = self->OnRemoveService( service );
		require_noerr( err, exit );

		if ( printer->services.size() == 0 )
		{
			err = self->OnRemovePrinter( printer, moreComing );
			require_noerr( err, exit );
		}
	}

exit:
	
	return;
}


void DNSSD_API
CPrinterSetupWizardSheet::OnResolve(
								DNSServiceRef			inRef,
								DNSServiceFlags			inFlags,
								uint32_t				inInterfaceIndex,
								DNSServiceErrorType		inErrorCode,
								const char *			inFullName,	
								const char *			inHostName, 
								uint16_t 				inPort,
								uint16_t 				inTXTSize,
								const char *			inTXT,
								void *					inContext )
{
	DEBUG_UNUSED(inFullName);
	DEBUG_UNUSED(inInterfaceIndex);
	DEBUG_UNUSED(inFlags);
	DEBUG_UNUSED(inRef);

	CPrinterSetupWizardSheet	*	self;
	Service						*	service;
	Queue						*	q;
	int								idx;
	OSStatus						err;

	require_noerr( inErrorCode, exit );

	service = reinterpret_cast<Service*>( inContext );
	require_quiet( service, exit);

	check( service->refs != 0 );

	self = service->printer->window;
	require_quiet( self, exit );

	err = self->StopOperation( service->serviceRef );
	require_noerr( err, exit );
	
	//
	// hold on to the hostname...
	//
	err = UTF8StringToStringObject( inHostName, service->hostname );
	require_noerr( err, exit );

	//
	// <rdar://problem/3739200> remove the trailing dot on hostname
	//
	idx = service->hostname.ReverseFind('.');

	if ((idx > 1) && ((service->hostname.GetLength() - 1) == idx))
	{
		service->hostname.Delete(idx, 1);
	}

	//
	// hold on to the port
	//
	service->portNumber = ntohs(inPort);

	if ( service->qtotal == 1 )
	{	
		//
		// create a new queue
		//
		try
		{
			q = new Queue;
		}
		catch (...)
		{
			q = NULL;
		}

		require_action( q, exit, err = E_OUTOFMEMORY );

		//
		// parse the text record.
		//

		err = self->ParseTextRecord( service, q, inTXTSize, inTXT );
		require_noerr( err, exit );

		service->queues.push_back( q );

		//
		// we've completely resolved this service
		//

		self->OnResolveService( service );
	}
	else
	{
		//
		// if qtotal is more than 1, then we need to get additional
		// text records.  if not, then this service is considered
		// resolved
		//

		err = DNSServiceQueryRecord(&service->serviceRef, 0, inInterfaceIndex, inFullName, kDNSServiceType_TXT, kDNSServiceClass_IN, OnQuery, (void*) service );
		require_noerr( err, exit );

		err = self->StartOperation( service->serviceRef );
		require_noerr( err, exit );
	}

exit:

	return;
}


void DNSSD_API
CPrinterSetupWizardSheet::OnQuery(
							DNSServiceRef		inRef, 
							DNSServiceFlags		inFlags, 
							uint32_t			inInterfaceIndex, 
							DNSServiceErrorType inErrorCode,
							const char		*	inFullName, 
							uint16_t			inRRType, 
							uint16_t			inRRClass, 
							uint16_t			inRDLen, 
							const void		*	inRData, 
							uint32_t			inTTL, 
							void			*	inContext)
{
	DEBUG_UNUSED( inTTL );
	DEBUG_UNUSED( inRRClass );
	DEBUG_UNUSED( inRRType );
	DEBUG_UNUSED( inFullName );
	DEBUG_UNUSED( inInterfaceIndex );
	DEBUG_UNUSED( inRef );

	Service						*	service = NULL;
	Queue						*	q;
	CPrinterSetupWizardSheet	*	self;
	OSStatus						err = kNoErr;

	require_noerr( inErrorCode, exit );

	service = reinterpret_cast<Service*>( inContext );
	require_quiet( service, exit);

	self = service->printer->window;
	require_quiet( self, exit );

	if ( ( inFlags & kDNSServiceFlagsAdd ) && ( inRDLen > 0 ) && ( inRData != NULL ) )
	{
		const char * inTXT = ( const char * ) inRData;

		//
		// create a new queue
		//
		try
		{
			q = new Queue;
		}
		catch (...)
		{
			q = NULL;
		}

		require_action( q, exit, err = E_OUTOFMEMORY );

		err = service->printer->window->ParseTextRecord( service, q, inRDLen, inTXT );
		require_noerr( err, exit );

		//
		// add this queue
		//

		service->queues.push_back( q );

		if ( service->queues.size() == service->qtotal )
		{
			//
			// else if moreComing is not set, then we're going
			// to assume that we're done
			//

			self->StopOperation( service->serviceRef );

			//
			// sort the queues
			//

			service->queues.sort( OrderQueueFunc );

			//
			// we've completely resolved this service
			//

			self->OnResolveService( service );
		}
	}

exit:

	if ( err && service && ( service->serviceRef != NULL ) )
	{
		service->printer->window->StopOperation( service->serviceRef );
	}

	return;
}


Printer*
CPrinterSetupWizardSheet::OnAddPrinter(
								uint32_t 		inInterfaceIndex,
								const char *	inName,	
								const char *	inType,	
								const char *	inDomain,
								bool			moreComing)
{
	Printer	*	printer = NULL;
	DWORD		printerNameCount;
	OSStatus	err;

	DEBUG_UNUSED( inInterfaceIndex );
	DEBUG_UNUSED( inType );
	DEBUG_UNUSED( inDomain );

	try
	{
		printer = new Printer;
	}
	catch (...)
	{
		printer = NULL;
	}

	require_action( printer, exit, err = E_OUTOFMEMORY );

	printer->window		=	this;
	printer->name		=	inName;
	
	err = UTF8StringToStringObject(inName, printer->displayName);
	check_noerr( err );
	printer->actualName	=	printer->displayName;
	printer->installed	=	false;
	printer->deflt		=	false;
	printer->resolving	=	0;

	// Compare this name against printers that are already installed
	// to avoid name clashes.  Rename as necessary
	// to come up with a unique name.

	printerNameCount = 2;

	for (;;)
	{
		CPrinterSetupWizardSheet::PrinterNames::iterator it;

		// <rdar://problem/4141221> Don't use find to do comparisons because we need to
		// do a case insensitive string comparison

		for ( it = m_printerNames.begin(); it != m_printerNames.end(); it++ )
		{
			if ( (*it).CompareNoCase( printer->actualName ) == 0 )
			{
				break;
			}
		}

		if (it != m_printerNames.end())
		{
			printer->actualName.Format(L"%s (%d)", printer->displayName, printerNameCount);
		}
		else
		{
			break;
		}

		printerNameCount++;
	}

	m_printers.push_back( printer );

	if ( GetActivePage() == &m_pgSecond )
	{
		m_pgSecond.OnAddPrinter( printer, moreComing );
	}

exit:

	return printer;
}


OSStatus
CPrinterSetupWizardSheet::OnAddService(
								Printer		*	printer,
								uint32_t 		inInterfaceIndex,
								const char	*	inName,	
								const char	*	inType,	
								const char	*	inDomain)
{
	Service	*	service = NULL;
	OSStatus	err     = kNoErr;

	DEBUG_UNUSED( inName );
	DEBUG_UNUSED( inDomain );

	try
	{
		service = new Service;
	}
	catch (...)
	{
		service = NULL;
	}

	require_action( service, exit, err = E_OUTOFMEMORY );
	
	service->printer	=	printer;
	service->ifi		=	inInterfaceIndex;
	service->type		=	inType;
	service->domain		=	inDomain;
	service->qtotal		=	1;
	service->refs		=	1;
	service->serviceRef	=	NULL;

	printer->services.push_back( service );

	//
	// if the printer is selected, then we'll want to start a
	// resolve on this guy
	//

	if ( printer == m_selectedPrinter )
	{
		StartResolve( service );
	}

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::OnRemovePrinter( Printer * printer, bool moreComing )
{
	CPropertyPage	*	active	= GetActivePage();
	OSStatus			err		= kNoErr;

	if ( active == &m_pgSecond )
	{
		m_pgSecond.OnRemovePrinter( printer, moreComing );
	}

	m_printers.remove( printer );

	if ( m_selectedPrinter == printer )
	{
		m_selectedPrinter = NULL;

		if ( ( active == &m_pgThird ) || ( active == &m_pgFourth ) )
		{
			CString caption;
			CString message;

			caption.LoadString( IDS_ERROR_CAPTION );
			message.LoadString( IDS_PRINTER_UNAVAILABLE );

			MessageBox(message, caption, MB_OK|MB_ICONEXCLAMATION);

			SetActivePage( &m_pgSecond );
		}
	}

	delete printer;

	return err;
}


OSStatus
CPrinterSetupWizardSheet::OnRemoveService( Service * service )
{
	OSStatus err = kNoErr;

	if ( service && ( --service->refs == 0 ) )
	{
		if ( service->serviceRef != NULL )
		{
			err = StopResolve( service );
			require_noerr( err, exit );
		}

		service->printer->services.remove( service );

		delete service;
	}

exit:

	return err;	
}


void
CPrinterSetupWizardSheet::OnResolveService( Service * service )
{
	// Make sure that the active page is page 2

	require_quiet( GetActivePage() == &m_pgSecond, exit );

	if ( !--service->printer->resolving )
	{
		// sort the services now.  we want the service that
		// has the highest priority queue to be first in
		// the list.

		service->printer->services.sort( OrderServiceFunc );

		// Now we can hit next

		SetWizardButtons( PSWIZB_BACK|PSWIZB_NEXT );
	
		// Reset the cursor	
		
		m_active = m_arrow;

		// And tell page 2 about it

		m_pgSecond.OnResolveService( service );
	}		

exit:

	return;
}


OSStatus
CPrinterSetupWizardSheet::StartBrowse()
{
	OSStatus err;

	//
	// setup the DNS-SD browsing
	//
	err = DNSServiceBrowse( &m_pdlBrowser, 0, 0, kPDLServiceType, NULL, OnBrowse, this );
	require_noerr( err, exit );

	err = StartOperation( m_pdlBrowser );
	require_noerr( err, exit );

	err = DNSServiceBrowse( &m_lprBrowser, 0, 0, kLPRServiceType, NULL, OnBrowse, this );
	require_noerr( err, exit );

	err = StartOperation( m_lprBrowser );
	require_noerr( err, exit );

	err = DNSServiceBrowse( &m_ippBrowser, 0, 0, kIPPServiceType, NULL, OnBrowse, this );
	require_noerr( err, exit );

	err = StartOperation( m_ippBrowser );
	require_noerr( err, exit );

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StopBrowse()
{
	OSStatus err;

	err = StopOperation( m_pdlBrowser );
	require_noerr( err, exit );

	err = StopOperation( m_lprBrowser );
	require_noerr( err, exit );

	err = StopOperation( m_ippBrowser );
	require_noerr( err, exit );

	while ( m_printers.size() > 0 )
	{
		Printer * printer = m_printers.front();

		m_printers.pop_front();

		if ( printer->resolving )
		{
			StopResolve( printer );
		}

		delete printer;
	}

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StartResolve( Printer * printer )
{
	OSStatus			err = kNoErr;
	Services::iterator	it;

	check( printer );

	for ( it = printer->services.begin(); it != printer->services.end(); it++ )
	{
		if ( (*it)->serviceRef == NULL )
		{
			err = StartResolve( *it );
			require_noerr( err, exit );
		}
	}

	m_selectedPrinter = printer;

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StartResolve( Service * service )
{
	OSStatus err = kNoErr;

	check( service->serviceRef == NULL );

	//
	// clean out any queues that were collected during a previous
	// resolve
	//

	service->EmptyQueues();

	//
	// now start the new resolve
	//

	err = DNSServiceResolve( &service->serviceRef, 0, 0, service->printer->name.c_str(), service->type.c_str(), service->domain.c_str(), (DNSServiceResolveReply) OnResolve, service );
	require_noerr( err, exit );

	err = StartOperation( service->serviceRef );
	require_noerr( err, exit );

	//
	// If we're not currently resolving, then disable the next button
	// and set the cursor to hourglass
	//

	if ( !service->printer->resolving )
	{
		SetWizardButtons( PSWIZB_BACK );

		m_active = m_wait;
		SetCursor(m_active);
	}

	service->printer->resolving++;

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StopResolve(Printer * printer)
{
	OSStatus err = kNoErr;

	check( printer );

	Services::iterator it;

	for ( it = printer->services.begin(); it != printer->services.end(); it++ )
	{
		if ( (*it)->serviceRef )
		{
			err = StopResolve( *it );
			require_noerr( err, exit );
		}
	}

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StopResolve( Service * service )
{
	OSStatus err;

	check( service->serviceRef );

	err = StopOperation( service->serviceRef );
	require_noerr( err, exit );

	service->printer->resolving--;

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StartOperation( DNSServiceRef ref )
{
	OSStatus err;

	err = WSAAsyncSelect((SOCKET) DNSServiceRefSockFD(ref), m_hWnd, WM_SOCKET_EVENT, FD_READ|FD_CLOSE);
	require_noerr( err, exit );

	m_serviceRefList.push_back( ref );

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::StopOperation( DNSServiceRef & ref )
{
	OSStatus err = kNoErr;

	if ( ref )
	{
		m_serviceRefList.remove( ref );

		if ( IsWindow( m_hWnd ) )
		{
			err = WSAAsyncSelect((SOCKET) DNSServiceRefSockFD( ref ), m_hWnd, 0, 0 );
			require_noerr( err, exit );
		}

		DNSServiceRefDeallocate( ref );
		ref = NULL;
	}

exit:

	return err;
}


OSStatus
CPrinterSetupWizardSheet::ParseTextRecord( Service * service, Queue * q, uint16_t inTXTSize, const char * inTXT )
{
	check( service );
	check( q );

	// <rdar://problem/3946587> Use TXTRecord APIs declared in dns_sd.h
	
	bool			qtotalDefined	= false;
	const void	*	val;
	char			buf[256];
	uint8_t			len;
	OSStatus		err				= kNoErr;

	// <rdar://problem/3987680> Default to queue "lp"

	q->name = L"lp";

	// <rdar://problem/4003710> Default pdl key to be "application/postscript"

	q->pdl = L"application/postscript";

	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "rp", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->name );
		require_noerr( err, exit );
	}
	
	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "pdl", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->pdl );
		require_noerr( err, exit );
	}
	
	if ( ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "usb_mfg", &len ) ) != NULL ) ||
	     ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "usb_manufacturer", &len ) ) != NULL ) )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->usb_MFG );
		require_noerr( err, exit );
	}
	
	if ( ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "usb_mdl", &len ) ) != NULL ) ||
	     ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "usb_model", &len ) ) != NULL ) )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->usb_MDL );
		require_noerr( err, exit );
	}

	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "ty", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->description );
		require_noerr( err, exit );
	}
		
	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "product", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->product );
		require_noerr( err, exit );
	}

	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "note", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		err = UTF8StringToStringObject( buf, q->location );
		require_noerr( err, exit );
	}

	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "qtotal", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		service->qtotal = (unsigned short) atoi( buf );
		qtotalDefined = true;
	}

	if ( ( val = TXTRecordGetValuePtr( inTXTSize, inTXT, "priority", &len ) ) != NULL )
	{
		// Stringize val ( doesn't have trailing '\0' yet )

		memcpy( buf, val, len );
		buf[len] = '\0';

		q->priority = atoi( buf );
	}

	// <rdar://problem/4124524> Was this printer discovered via OS X Printer Sharing?

	if ( TXTRecordContainsKey( inTXTSize, inTXT, "printer-state" ) || TXTRecordContainsKey( inTXTSize, inTXT, "printer-type" ) )
	{
		service->printer->isSharedFromOSX = true;
	}

exit:

	// The following code is to fix a problem with older HP 
	// printers that don't include "qtotal" in their text
	// record.  We'll check to see if the q->name is "TEXT"
	// and if so, we're going to modify it to be "lp" so
	// that we don't use the wrong queue

	if ( !err && !qtotalDefined && ( q->name == L"TEXT" ) )
	{
		q->name = "lp";
	}

	return err;
}


Printer*
CPrinterSetupWizardSheet::Lookup(const char * inName)
{
	check( inName );

	Printer			*	printer = NULL;
	Printers::iterator	it;

	for ( it = m_printers.begin(); it != m_printers.end(); it++ )
	{
		if ( (*it)->name == inName )
		{
			printer = *it;
			break;
		}
	}

	return printer;
}


bool
CPrinterSetupWizardSheet::OrderServiceFunc( const Service * a, const Service * b )
{
	Queue * q1, * q2;

	q1 = (a->queues.size() > 0) ? a->queues.front() : NULL;

	q2 = (b->queues.size() > 0) ? b->queues.front() : NULL;

	if ( !q1 && !q2 )
	{
		return true;
	}
	else if ( q1 && !q2 )
	{
		return true;
	}
	else if ( !q1 && q2 )
	{
		return false;
	}
	else if ( q1->priority < q2->priority )
	{
		return true;
	}
	else if ( q1->priority > q2->priority )
	{
		return false;
	}
	else if ( ( a->type == kPDLServiceType ) || ( ( a->type == kLPRServiceType ) && ( b->type == kIPPServiceType ) ) )
	{
		return true;
	}
	else
	{
		return false;
	}
}


bool
CPrinterSetupWizardSheet::OrderQueueFunc( const Queue * q1, const Queue * q2 )
{
	return ( q1->priority <= q2->priority ) ? true : false;
}