c funcs

TheMSsForum.com: The Microsoft Software Forum

The MSS Forum ‹ Drivers
- Archive
  - Biz
  - MCSE
  - CRM
  - Drivers
  - Framework
  - ADO
  - ASP
  - Compact
  - Forms
  - Dotnet
  - C#
  - VB
  - FontpageGen
  - Excel
  - WorkSheet
  - Exchange
  - Setup
  - Fox
  - Fontpage
  - ASP
  - IIS
  - Entourage
  - Money
  - Messanger
  - PocketPC
  - Powerpoint
  - Project
  - Publisher
  - Excel
  - VB
  - Security
  - Portal
  - Services
  - SQLServerDev
  - SVCS
  - SQLServer
  - VB
  - VC
  - MFC
  - ExcelGen

- Previous
  - 1
    - NT4 kernel mode oemuni printer driver Hello, After searching a bit, I got a checked build NT4 SP6, I got the unidrv4.dll,uni4ui.dll and unires.dll Directory of E:\SUPPORT\PRINTERS\I386 09/01/1999 02:15a 393,488 UNI4UI.DLL 09/01/1999 02:18a 400,208 UNIDRV4.DLL 09/01/1999 02:18a 623,888 UNIRES.DLL 3 File(s) 1,417,584 bytes I copied these files and put them in oemdll directory. I renamed them to unidrv.dll,unidrvui.dll. Now I went to the XP ddk and built the koemuni.dll. I tweaked up the oemdll.inf in the \oemdll directory of the XP ddk to point to the koemuni.dll instead of oemuni.dll. Now I do the Add printer steps and finally it lands with a failure dialogbox on windows 2000 saying:- --------------------------- Add Printer Wizard --------------------------- Printer driver was not installed. Operation could not be completed. --------------------------- OK --------------------------- "D:\WINDDK\2600\src\print\oemdll\oemdll.htm" says:- "However, the Windows NT® 4.0 printer driver files will either need to be copied to the local directory containing Oemdll.inf, or during installation, you will need to point to the location where these files may be found. For the kernel-mode samples to work, the kernel-mode drivers (the Windows NT 4.0 drivers) used most support COM OEM Printer Customization DLL extensions, while the driver files in Windows NT 4.0 Service Pack 4 and earlier do not." I do this on a windows 2000 machine.Am I using a wrong version of unidrv4.dll and uni4ui.dll,etc. thanks vipin Tag: c funcs Tag: 48583
  - 2
    - how apc work? I've read that after kernel has queued apc in destination thread it request software interrupt at apc level. All threads execute at irql<=1 so how is it made?. Is it that nothing happens with apc queued calls until irql drops below 1(to 0) to start apc interrupt and than we are in some thread. What will happen if apc is in other thread. Is kernel checking all threads in system for threads with apc and executing them and after processing all apc releases interrupt or how it works? Tag: c funcs Tag: 48581
  - 3
    - howto determine raid volumes ? Hi, how can i programmatically determine if a storage volume is on a Raid Array ? -and gather information about what type of Raid etc. ? Tag: c funcs Tag: 48580
  - 4
    - how to send PCM data to sound card for stream driver?? Hi can anyone tell me how to do this ?? my hardwave can capture sound data form microphone and translate it to PCM format,and then use DMA send it to PCI, The stream driver say it can send data to sound card directly,how to do it?? Second when AdapterCancelPacket is received , if I have multiple same stream,how to identify it?? how do I know which one need to cancel ?? I have put a variable "StreamID" in my stream_extension,but I cann't got my streamID form (PSTREAMEX)pSrb->StreamObject->HwStreamExtension->StreamID; how to do it?? Thanks a lot Tag: c funcs Tag: 48579
  - 5
    - printer driver -> font much too small Hi In the DrvTextOut function of my virtual pritner driver I'd like to calculate the font size (in device units) that I have to pass to the CreateFont function to replay the recorded print job. Now... how do I calculate this? like this: IFIMETRICS *ifFnt = FONTOBJ_pifi(pfo); XFORMOBJ *xFrmObj = FONTOBJ_pxoGetXform(pfo); XFORML xFrm; XFORMOBJ_iGetXform(xFrmObj, &xFrm); float eXScale = sqrt(xFrm.eM11 * xFrm.eM11 + xFrm.eM12 * xFrm.eM12); float eYScale = sqrt(xFrm.eM22 * xFrm.eM22 + xFrm.eM21 * xFrm.eM21); int SizeInDeviceUnits = (int)(0.5 + (eYScale * ifFnt->fwdUnitsPerEm)); well, this code is not invented by me... I got it from http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q264243 ok, they calculate the point font size... so the Size they calculate is iTmp = (int)(0.5 + eYScale * fwdUnitsPerEm * 72) / sizLogResPpi; Now the problem: The calculatet font size is about 10% too small. ... can someone explain me why? I mean, 10% is not nothing... could this have to do with the resolution of my device? ... any ideas how to find out what's wrong here? thanks a lot MR Tag: c funcs Tag: 48578
  - 6
    - How to use RegisterDeviceNotification() I am writing an utility that wants to get the pnp notification. When I use the function, RegisterDeviceNotification(), the returned value is: 1066 (ERROR_SERVICE_SPECIFIC_ERROR, The service has returned a service-specific error code.) Here is the source code I wrote: DEV_BROADCAST_HANDLE filter = {0}; filter.dbch_size = sizeof(filter); filter.dbch_devicetype = DBT_DEVTYP_HANDLE; filter.dbch_handle = m_hDriver; m_hHandleNotification = RegisterDeviceNotification(m_hWnd, &filter, DEVICE_NOTIFY_WINDOW_HANDLE); Do I make mistake somewhere? Any suggestion is appreciated. Thank you Ivan Tag: c funcs Tag: 48577
  - 7
    - Can I use OIDs query and set in Windows Limited User mode Dears I've tried CreateFile with device GUID but fail in Limited User mode , can I overcome this issue writing Windows NDIS network driver interface ? Thanks a lot .. Tag: c funcs Tag: 48575
  - 8
    - another question for using ntstrsafe.lib while using ntstrsafe.lib in my w2k driver I get the following error : ntstrsafe.lib(wctomb.obj) : error LNK2019: unresolved external symbol _RtlUnicodeToMultiByteN@20 referenced in function _wctomb ntstrsafe.lib(mbtowc.obj) : error LNK2019: unresolved external symbol _RtlAnsiCharToUnicodeChar@4 referenced in function _mbtowc My DDK build is windows xp DDK 2600.1106 What could be the problem TIA Tag: c funcs Tag: 48572
  - 9
    - signing a driver for a multiport serial device I want to get my driver for a multiport serial device signed by Microsoft. However, multiport serial devices do not fall into any of the device categories listed at http://www.microsoft.com/whdc/hwtest/device/default.mspx Is there any chance to have this driver signed? Slawomir Tag: c funcs Tag: 48565
  - 10
    - PnP test tool report registry error even though it runs fine The driver is for a special disk controller. It is witten based on a floppy disk controller model and runs fine. But after running the test using the PnP test tool provided with the WinXP DDK, it does not work any more. Test result in PnP test tool shows under PROBLEM INFORMATION: case CM_PROB_REGISTRY. Under device manager, the device show in General TAB: "Windows cannot start this hardware device because its configuration information (in the registry) is incomplete or damaged (Code 19)" According to the doc in the DDK, the cause to this is said: "This error message occurs when a device has more than once service defined, if there is a problem opening the Service key, or if you cannot locate the driver name from the Service key" I looked in the registry, and found only one ImagePath for this device And the path is correct. Any suggestion is appreciated. Thank you Long Tag: c funcs Tag: 48561
  - 11
    - INF File to instal a driver I wrote a custom printer driver. I used the dlportio driver to talk to the prarallel port. The problem is dlportio has to be install in order for my driver to work properly. How do I install dlportio as part of my printer driver installation without having the user to install it separately? Can I include that in my inf file? -- Oreo Tag: c funcs Tag: 48544
  - 12
    - HCT surprise removal failure I am running the surprise removal test on a smartcard reader driver. It failed with the following message in the test log: Variation 1: Starting test 0 PCI\VEN_8086&DEV_2444&SUBSYS_0074A0A0&REV_05\3&13C0B0C5&0&FC | ID=USB\VID_0ACD&PID_0401\5&331A1505&0&2 | Friendly Name=.... | DevDesc=... | Test Interface=(null) | PnP Interface=\\?\USB#Vid_0acd&Pid_0401#5&331a1505&0&2#{50dd5230-ba8a-11d1-bf5d- 0000f805f530} |Surprise Removed FAILED 0x13 What does this error code 0x13 mean? I searched the HCT document and came up empty. Somebody out there know what this is all about? Thanks, Tag: c funcs Tag: 48540
  - 13
    - USB selective suspend assertion 9.20.6 I am running this test on a USB smartcard reader. The test appeared to have failed the following assertion: 490.460 : VAR[INFO ] 0 : Assertion 9.20.6: Bus Initialization 490.460 : VAR[INFO ] 0 : Device with ID 0ACD/0401 found in tree but tree must be at least 1 external hubs deep but not more than 2 external hubs deep. 490.460 : VAR[SEV1 ] 0 : Assertion 9.20.6: 490.460 : +VAR+SEV1 0 : Assertion 9.20.6: Ends Note: Assertion 9.20.6 is not described in HCT documentation. Call somebody shed some light on this? Tag: c funcs Tag: 48538
  - 14
    - ISR problem with my own com-port FDO-driver hello, i'm currently working on a simple fdo-driver to replace serial.sys on my win2k machine. the driver only has to read/write over COM-port, but needs a special isr. the serial-source from the ddk is very complex and does not properly build, so i thought to make my own serial-driver. the main problem is: within the function to handle the pnp-irp IRP_MN_START_DEVICE i want to connect my isr. it seems to work (the debug-msg tells me so). but i can't notice any call of this isr. so far the driver can read/write over the com-port, but only on IRP_MJ_READ/_WRITE. now i need an isr to read when data is available. i set the appropriate register values (interrupt enable = 0x01) but nothing happens when uart receives a byte. what am i doing wrong? i would be very happy about any suggestions, because i couldn't crack this prob for nearly a week :( thanks here my code of the interrupt connection: ========================================================================================= NTSTATUS HandleStartDevice( IN PDEVICE_OBJECT pDO, IN PIRP pIrp ) { USHORT IntMode; ... PCM_RESOURCE_LIST pResourceList; PCM_FULL_RESOURCE_DESCRIPTOR pFullDescriptor; PCM_PARTIAL_RESOURCE_LIST pPartialList; PCM_PARTIAL_RESOURCE_DESCRIPTOR pPartialDescriptor; int i; NTSTATUS status; // ---------- get resource list from irpstack-location --------------- pResourceList = pIrpStack->Parameters.StartDevice.AllocatedResourcesTranslated; pFullDescriptor = pResourceList->List; pPartialList = &pFullDescriptor->PartialResourceList; for (i=0; i<(int)pPartialList->Count; i++) { pPartialDescriptor = &pPartialList->PartialDescriptors[i]; switch (pPartialDescriptor->Type) { case CmResourceTypeInterrupt: pDevExt->IRQL = (KIRQL)pPartialDescriptor->u.Interrupt.Level; pDevExt->Vector = pPartialDescriptor->u.Interrupt.Vector; pDevExt->Affinity = pPartialDescriptor->u.Interrupt.Affinity; if (pPartialDescriptor->Flags & CM_RESOURCE_INTERRUPT_LATCHED) IntMode = Latched; else IntMode = LevelSensitive; break; case CmResourceTypeDma: break; case CmResourceTypePort: pDevExt->portBase = (PUCHAR)pPartialDescriptor->u.Port.Start.LowPart; pDevExt->portLength = pPartialDescriptor->u.Port.Length; break; case CmResourceTypeMemory: break; } /*switch*/ }/*for*/ // ----------------------check resources----------------------- if (pDevExt->IRQL == 0 || pDevExt->portBase == 0) return STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT; // -------------------------connect interrupt--------------------------- status = IoConnectInterrupt( &pDevExt->pIntObj, // interrupt-object MyIsr, // ISR pDevExt, // context for ISR pDevExt->pSpinLock,// no spin lock pDevExt->Vector, // vector pDevExt->IRQL, // DIRQL pDevExt->IRQL, // DIRQL (KINTERRUPT_MODE)IntMode, // Latched TRUE, // interrupt shareable pDevExt->Affinity, // processor-affinity FALSE ); // fp-register #if DBG switch(status) { ... DbgPrint(".."); ... } #endif pDevExt->state = Started; return PassDownPnP(pDO, pIrp); } Tag: c funcs Tag: 48536
  - 15
    - Compliance Test Suite (for USB 2.0 device) Fails (Enumeration Test) Hi all, I tried to run the compliance test suite (Command Verifier) for our USB 2.0 device, all the tests expect Enumeration test (last test) passed successfully. But the Enumeration test always fails in the zeroth iteration. If the test suite was run in 'debug mode', the Enumeration test passes for any number of times. But in the 'Compliance test' mode, all the enumeration sequences (like Reset, Get Device descriptor, Set Address, Get Configuration descriptor) runs for one time perfectly and device responds to them with appropriate data and status stage was also completed sucessfully. But after this there is no other responds from the host, and the test was initimated as failed. In the report, it was mentioned "Enumeration test fails at iteration 0" Required Suggestions. Thanks VCSViswa Tag: c funcs Tag: 48535
  - 16
    - printer driver epson stylus 800 color Can anyone here help me to a printerdriver for my old Epson stylus color 800 printer. My operating system is Windows XP I can"t find anyone good working driver for this printer on the net?? Not even on the Epson-site. Thanks, - Bert Tag: c funcs Tag: 48532
  - 17
    - Monitoring Remote File System Access Hi, i'm working on a project where i have to monitor remote file system access at the TDI Level. I have trouble to do this, because it seems that some data is transmitted to the remote side without using TDI_SEND. Following happens: a TDI-Client established a tcp-connection to the remote-side on port 139 and sent data (using TDI_SEND). On a data indication from the remote site (TDI ClientEventReceive) data is sent back to the remote site by using a function other than TDI_SEND. To monitor the traffic i use a filter-driver, loaded after tcpip.sys and before netbt.sys. In addition i tried a driver which hooks the dispatch-table of tcpip.sys, both driver doesn't show the second data transmission. How can i monitor the second (and i believe further) data transmissions Thanks, Jens Tag: c funcs Tag: 48526
  - 18
    - How to create a network bridge in windows xp? How can i write a program to create a network bridge in windows xp? Thanks Tag: c funcs Tag: 48525
  - 19
    - Disabling interrupts for all processors on SMP Yes, certainly it is really bad idea: But I need update the configuration of a SuperIO-chip (setup watchdog timer), so it is necessary. On UP-system it is really simple, but on MP an interrupts must be disabled synchronously on all processors. Otherwise any interrupt raised on the "live" CPU may cause an IPI (Inter-Processor Interrupt) to the other "frozen" CPU, and the system will hang. Unfortunately NT kernel hides IPI inside, and doesn't have suitable facility to do such task on SMP. Currently I implemented this by DPCs with interlocked-frozen loop, but it takes up to 100-1000 iterations on the each CPU for entering into target "irq-safe" mode. Perhaps someone knows the better solution? Tag: c funcs Tag: 48524
  - 20
    - Handling IRP_MN_QUERY_ID for my usb generic parent driver ,what should I return for this IRP for BusQueryInstanceID, I read in DDK that bus driver should supply a string that contains the instance ID for the device. ,what should be the instanceID for the PDOs on my device ? should I just make them up like 1,2,3 etc ...? Tag: c funcs Tag: 48521
  - 21
    - OS found the new hardware when I only remove board to another slot Hello, I am writing a XP/Win2000 PnP PCI-bus driver. I found out the next problem: When I remove the board to another PCI slot an operation system behaviors like it finds the new harware and asks me to install a driver. But the diver was already installed! Thanks Victoria Tag: c funcs Tag: 48517
  - 22
    - Debugging drivers Hi, I am new to windows device drivers. I want to debug the driver i have written. I have with me 4 cds with windows 2k symbols. do i have to install all cds or is it ok if install only the last cd windows 2ksp4 symbols, as i have installed sp4 om my pc. TIA Narendra Tag: c funcs Tag: 48515
  - 23
    - builld I wantd to include some .objs (from previous compiled directory)while linking my driver code. is it possible to do in the sources file of windows build? Tag: c funcs Tag: 48513
  - 24
    - passthru problem hello all, i am working with passthru ndis im driver. i was trying to get the incomming and outgoing packet data , send it to a peer driver for processing, get it back and then send the data along its original path. i was copying the data from MPSend() and PtReceivePacket() functions into a local packet and scheduling it to be processed later and retransmitted. after a lot of travail (some of you would have seen my postings :) ), i managed (with a lot of help from this forum) to get the two systems ping each other. i can also explore one system from the other a little bit but the problem is that when i try to access a little larger folder or file the process hangs for some time and after some time an error message pops up saying that make sure that the file exists on the target drive. when the process is waiting my debug traces also halt and it looks like that no activity is going on. can any body throw some light as to what may be happening here ? it also does not pings greater than a certain number of bytes. i guess it has something to do with the MTU but i also smell some link between this problem and the above one ? can somebody help me out here ? thanks and regards. Tag: c funcs Tag: 48510
  - 25
    - PCI Bus Filter driver to read config space? Hi All! I'm trying to port an app which dumps PCI config space info on Win2K3. I understand you can no more use HALGetBusData in Win2K and beyond. To use "interface" methods suggested in MS KB articles,you need the PDO. If you are going to dump config space of arbitary devices, how do you obtain PDO to read config space? Will writing a PCI bus filter driver solve this? -- Thanks, Elam "Experience is an expensive school" - Twain. Tag: c funcs Tag: 48505
- Next
  - 1
    - Registering Interfaces I am developing a driver for a PCI device that has multiple communication channels. In an attempt to have each channel opened and used individually I have tried registering an interface for each channel in the AddDevice routine; that way a different handle may be used for each channel. However, enumeration of the interfaces in an application does not locate all of those registered in the driver. Should I even be using multiple interfaces or should I name my device object and subdivide its namespace for each channel? Thank you for your time. Tag: c funcs Tag: 48495
  - 2
    - upgrade driver??? Does anyone have sample of how to upgrade an imediate driver? Any help are appreciated... Thanks, Hannah Tag: c funcs Tag: 48488
  - 3
    - What about mapping sections to system addresses? I have a small piece of code which creates section for ntdll.dll and maps it to the system addresses. But W2K and XP after running this code becomes unable to run new processes. It looks like ntdll.dll completely unmapped from the system. But on Windows Server 2003 all seems work fine. If comment out calls to MmMapViewInSystemSpace/MmUnmapViewInSystemSpace then all is okay. If SEC_IMAGE substitute to SEC_COMMIT then again all is okay. What is wrong? NTSTATUS foo( VOID ) { UNICODE_STRING FileName; OBJECT_ATTRIBUTES ObjectAttributes; IO_STATUS_BLOCK IoStatusBlock; PVOID SectionObject; HANDLE FileHandle; HANDLE SectionHandle; PVOID Base; UINT Size; NTSTATUS Status; RtlInitUnicodeString( &FileName, L"\\SystemRoot\\system32\\ntdll.dll" ); InitializeObjectAttributes( &ObjectAttributes, &FileName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL ); Status = ZwCreateFile( &FileHandle, GENERIC_READ, &ObjectAttributes, &IoStatusBlock, NULL, 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, FILE_OPEN, 0, NULL, 0 ); if( Status != STATUS_SUCCESS ) { return Status; } InitializeObjectAttributes( &ObjectAttributes, NULL, OBJ_KERNEL_HANDLE, NULL, NULL ); Status = ZwCreateSection( &SectionHandle, SECTION_MAP_READ, &ObjectAttributes, NULL, PAGE_READONLY, 0x01000000, // SEC_IMAGE FileHandle ); if( Status != STATUS_SUCCESS ) { ZwClose( FileHandle ); return Status; } Status = ObReferenceObjectByHandle( SectionHandle, SECTION_MAP_READ, NULL, KernelMode, &SectionObject, NULL ); if( Status != STATUS_SUCCESS ) { ZwClose( SectionHandle ); ZwClose( FileHandle ); return Status; } Base = NULL; Size = 0; Status = MmMapViewInSystemSpace( SectionObject, &Base, &Size ); ObDereferenceObject( SectionObject ); if( Status != STATUS_SUCCESS ) { ZwClose( SectionHandle ); ZwClose( FileHandle ); return Status; } MmUnmapViewInSystemSpace( Base ); ZwClose( SectionHandle ); ZwClose( FileHandle ); return STATUS_SUCCESS; } Tag: c funcs Tag: 48481
  - 4
    - USB Driver Hi, I need to develop a WDM driver for a touch screen (Thro an controller) connected to an USB port. I have the necessary tools like the latest DDK. may I have some examples (in C/C++)? Also can i get some links to tutorial regarding this. TIA Narendra Tag: c funcs Tag: 48467
  - 5
    - FileSystem Driver: files in explorer are not sorted correctly I am developping a FileSystem Driver and i ha ve strange behavior when I use explorer on my driver. when I go in a directory of my filesystem, I have the file and directory that are sorted alphabetically and together : I Have : A1.txt A2.txt Dir1 Dir2 Dir3 Z1.txt Z2.txt instead of: Dir1 Dir2 Dir3 A1.txt A2.txt Z1.txt Z2.txt when I implement IRP_MJ_DIRECTORY_CONTROL/FileBothDirectoryInformation I return in FILE_BOTH_DIR_INFORMATION.FileAttributes FILE_ATTRIBUTE_DIRECTORY when my item is a directory and FILE_ATTRIBUTE_NORMAL for a file. Explorer display my directory with good icon and I can enter in, but only the sort is not working well. I create my device as a FILE_DEVICE_NETWORK_FILE_SYSTEM (same with FILE_DEVICE_DISK_FILE_SYSTEM) for avoid requests for subfolder. Have you any idea where I miss some informations to send from my driver ? Thanks. -- Kurt Crawford Tag: c funcs Tag: 48464
  - 6
    - Handling IRP_MN_QUERY_BUS_INFORMATION In my usb generic parent driver for win 2K ,how should I handle this IRP for the PDO ? what info should I return ? is the following ok busInfo->BusTypeGuid = GUID_BUS_TYPE_USB; busInfo->LegacyBusType = PNPBus; busInfo->BusNumber = 0; Tag: c funcs Tag: 48463
  - 7
    - NT4 unitool sMaxPhysWidth limitation Hello, I was trying to modify a minidriver sample HP laserjet III in NT4 ddk by adding a 2400 dpi resolution. I see that the PrinterData-->ModelData-->sMaxPhysWidth in unitool.exe can't take more than 32767 master units. So at 2400 dpi through the unitool.exe, I can't give support for a paper size more than 32767/2400 = 13.6" at 2400 dpi. Can someone tell me if this a limitation with the NT4 GPC based mindrivers or with unitool.exe? If so, Is there a work around? If I see there is no solution with minidriver, then I would use the monolithic solution. thanks vipin Tag: c funcs Tag: 48462
  - 8
    - hidden flag for device manager from devmgmt.msc hello, i believe i saw some info once about a hidden command line or environment variable flag that is passed to device manager when it is invoked through command line through devmgmt.msc , this flag i believe adds a new tab in the property sheet that shows more info about each device regards Taha Tag: c funcs Tag: 48460
  - 9
    - w2k intermediate driver binding I have a mux-intermediate driver, which binds over ethernet adapters. Now i want to selectively bind it. That is, i want it to bind only over our PCI device, and not bind over other vendor's devices. Any idea how i can do this? I try to give an error code from the Notify Object's "QueryBindingPath", but this doesn't seem to work. It only disables the binding, but it does not stop the binding from hapenning. Regards, Anand. Tag: c funcs Tag: 48453
  - 10
    - BDA and AVStream : where to download DVB-T stream? Dear All, I am porting a BDA driver for DVB-T. I would like to use a DVB-T stream to test my BDA driver. Where could I download DVB-T streams from internet? Thanks, Edward Tag: c funcs Tag: 48452
  - 11
    - IRP_MJ_CLEANUP/IRP_MJ_CLOSE ordering When an application exits abnormally, are file handles closed following a documented order? Is there some ordering that is guaranteed to be followed? Do file handles get closed in the opposite order from creation, same order, or random order? Thanks, - Fab Tag: c funcs Tag: 48447
  - 12
    - Ordering of IRP_MJ_CLEANUP/IRP_MJ_CLOSE Does the I/O manager guarantee any sort of ordering with respect to file handles during abnormal user-mode program termination? That is, if an application opens a series of file handles and then crashes, will those handles get closed in the opposite order from creation, same order, random order? Is this documented somewhere in the DDK? Thanks, - Fab Tag: c funcs Tag: 48446
  - 13
    - User-space mapping from kernel I'm developing a security application that needs to read the memory of an arbitrary process in userspace to monitor integrity. The DDK seems to insist that access into userspace from a driver really only occurs into the context of the calling process. Thus I see two viable options: 1. Simulate virtual address translation in software by reading kernel data structures and the page tables, or 2. Find a way to call the driver from the appropriate process so that all this is taken care of, which would probably require us to do some elaborate and dangerous hackery. There are other ways of doing this (e.g. clobbering CR3 or modifying the callee's page tables) but these are likely to break the paging mechanism, among other things. The question is: Are there better ways of reading an arbitrary process's userspace data from a driver than (1) or (2) above? Thanks in advance. Tag: c funcs Tag: 48444
  - 14
    - Re: Hardware Id Thanks, I'll try that out. Tag: c funcs Tag: 48439
  - 15
    - Hardware Id I'm programatically installing a plug and play device using UpdateDriverForPlugAndPlayDevices. One of the arguments to that function is a Hardware Id string. I have already contacted the manufacturer of the said device, but I would like to know if there was a way to obtain the Hardware Id string for all of the attached USB devices currently attached. Thanks, Edward Tag: c funcs Tag: 48433
  - 16
    - Kernel equivalent to PostQueuedCompletionStatus? Is there any kernel equivalent to PostQueuedCompletionStatus? I have a file handle on which I recieve IOCTL requests. I would like to be able to, from my IOCTL handler, post a completion to an I/O completion port using an user-supplied completion port handle passed in my IOCTL input buffer. I need to - validate the completion port handle and get the equivalent kernel object handle. - post a completion entry to the completion port. Can this be done? Thanks, - Fab Tag: c funcs Tag: 48428
  - 17
    - compiler bug? While it would seem farfetched, I seem to be the victim of a compiler bug in the DDK. I have code that effectively does the following: UINT8 x; UINT64 y; x = InterlockecIncrement( some_var ) & 0xFF; y = SOME_64_BIT_CONSTANT + x; y = _byteswap_uint64( y ); The x86 assembly for this looks like this: f4724f5c ff15a0a172f4 call dword ptr [_imp_InterlockedIncrement (f472a1a0)] f4724f62 25ff000000 and eax,0xff f4724f67 99 cdq f4724f68 0500000400 add eax,0x40000 f4724f6d 0fc8 bswap eax f4724f6f 81d26a060010 adc edx,0x1000066a f4724f75 894584 mov [ebp-0x7c],eax f4724f78 0fca bswap edx f4724f7a 8d4580 lea eax,[ebp-0x80] f4724f7d 894d80 mov [ebp-0x80],ecx The last instruction above stores the contents of ECX rather than EDX into my variable. ECX contains garbage at this point. This behavior goes away if I simply introduce a DbgPrint of the 64-bit value. What am I doing wrong? How do I fix this? Thanks, - Fab Tag: c funcs Tag: 48421
  - 18
    - Where should i free the packet and buffer memory in PtReceivePacket? Hi All, i am creating my own packet from the received packet. in PtReceivePacket function after indicating the receive packet, when should i release the memory. In PASSTHRU example, if the status==NDIS_STATUS_RESOURCE, then we can free the packet and memory right there. I am not sure why we can? But if status is not NDIS_STATUS_RESOUCE, then where should i release all the memory and free the packet? Do we have to do it in the ReceiveComplete, then how can i get the packet in ReceiveComplete? Thanks in advance. Rajesh Tag: c funcs Tag: 48417
  - 19
    - Re: NdisTransferData on full packet indications Yup. I see that now. Thanks to everyone for the clarification! Cheers, Eric Alireza Dabagh [MS] wrote: > > Excellent. This is the missing piece of information I needed. This > > seems like a fairly critical detail. Did I miss it in the DDK docs or > > is it not there? > > DDK defines the interface between miniports and NDIS and NDIS and protocols. > Per DDK miniport can only get a call to its XferData if it used > IndicateReceive (and not IndicateReceivePacket) to indicate the data. That > should be enough to clear the requirements for the miniports regardless of > what NDIS does with the packet. As far as miniport knows, a packet indicated > with IndicateReceive to NDIS, can be indicated to the protocol by calling > Protocol's IndicateReceivePacket handler and vice versa. Miniports should > not be concerned about this. > > -thanks, ali > -- > This posting is provided "AS IS" with no warranties, and confers no rights. Tag: c funcs Tag: 48411
  - 20
    - Re: Power Management in PASSTHRU Thanks Ali. I'm looking forward to hearing what you find out. Cheers, Eric Alireza Dabagh [MS] wrote: > You may be right and this initialization based on a query might not be the > right thing to do. We'll investigate this (and the other variable protection > issue you brought up.) > > -thanks, ali > > -- > This posting is provided "AS IS" with no warranties, and confers no rights. Tag: c funcs Tag: 48410
  - 21
    - Need a simple kb/mouse hook device driver Greetings! I'm in need of a very simple device driver, but I have no access to the DDK. Here's what I need: the driver should hook low-level keyboard and mouse messages with MouFilter_IsrHook and KbFilter_IsrHook. Within the keyboard hook, the driver should verify the event is a KEYDOWN event (not KEYUP) and if so, call QueryPerformanceCounter and store the most recent value. Within the mouse hook, the driver should verify that the event is a button press (not button release), and if so, then call QueryPerformanceCounter and store the most recent value. The driver should provide a way for an application to read the most recent saved values. That's it. Can anyone help? J.R. Tag: c funcs Tag: 48397
  - 22
    - Packaging an NDIS IM driver Hi, I have an NDIS IM driver and my target platforms are Win2K, WinXP, and Win2003. This driver will go through WHQL certification. I am not sure which is the best way to package the driver. Since I want a Win2K digital signature, I will need a combined INF file for all platforms. Is it better to build separate binaries for each platform (e.g. build my Win2K NDIS IM driver with the Win2K DDK, build my WinXP NDIS IM driver with the WinXP DDK, and build my Win2003 NDIS IM driver with the Win2003 DDK) and have a complicated INF file to install the different binaries. Or should I compile just one binary using the Win2K DDK and have the INF install that binary on all platforms. My driver does not take advantage of NDIS v5.1, it works just as well with NDIS v5.0. Roger Tag: c funcs Tag: 48388
  - 23
    - DMA to Video Dear All, is there a way to make a DMA transfer from a PCI device to "video ram" (I want to show a video stream from custom source) ? I know how to make DMA to user memory and then copy this memory to video, but this requires CPU usage and I want to do without using CPU. "Video ram" is contiguous or fragmented (Have I to use scatther-gather DMA) ? Where should I start from to realize my project ? Thank you very much, Blu Tag: c funcs Tag: 48383
  - 24
    - Error invalid printer command I am in a dilema here. The SDK dokumentation says with regard to SetPrinter the below but when I try a PRINTER_CONTROL_SET_STATUS with pPrinter as a DWORD filled with one of the valid printer status the function always fails with 1803 which is // MessageId: ERROR_INVALID_PRINTER_COMMAND // // MessageText: // // The printer command is invalid. // #define ERROR_INVALID_PRINTER_COMMAND 1803L When I use SetPrinter with PRINTER_INFO_2 it works but again the documentation says that the status will be ignored. So what am I supposed to do here????? Any help greatly appreciated. /Manfred BOOL SetPrinter( HANDLE hPrinter, // handle to printer object DWORD Level, // structure level LPBYTE pPrinter, // pointer to array containing printer data DWORD Command // printer-state command ); Level Structure 0 If the Command parameter is PRINTER_CONTROL_SET_STATUS, pPrinter must contain a DWORD value that specifies the new printer status to set. For a list of the possible status values, see the Status member of the PRINTER_INFO_2 structure. Note that PRINTER_STATUS_PAUSED and PRINTER_STATUS_PENDING_DELETION are not valid status values to set. If Level is 0, but the Command parameter is not PRINTER_CONTROL_SET_STATUS, pPrinter must be NULL. Command Specifies the action performed by the SetPrinter function. If the Level parameter is nonzero, Command must be zero. In this case, the printer retains its current state and the function reconfigures the printer data as specified by the Level and pPrinter parameters. If the Level parameter is zero, Command can be one of the following values to set the state of the printer. Value Meaning PRINTER_CONTROL_PAUSE Pauses the printer. PRINTER_CONTROL_PURGE Deletes all print jobs in the printer. PRINTER_CONTROL_RESUME Resumes a paused printer. PRINTER_CONTROL_SET_STATUS Sets the printer status. The pPrinter parameter points to a DWORD that specifies the new printer status. The SetPrinter function ignores the pServerName, AveragePPM, Status, and cJobs members of a PRINTER_INFO_2 structure. Tag: c funcs Tag: 48382
  - 25
    - correct way to register "copy only inf files" What is the correct way of registering with setup api an inf file that is not signed which other wise is just a "copy to c:\windows\inf" install. should i just copy the inf file or is there a corret setupapi function to register the inf. Tag: c funcs Tag: 48380

why shldnt one use c functions such strcmp, stricmp in kernel mode?
venkat

Re: c funcs by Mark

Mark
Thu Jul 15 06:06:16 CDT 2004

You can use some of the c runtime functions. The use of the string functions
is currently deprecated and you are strongly urged to use the equivalents
from the string safe library package ntstrsafe.lib.

--

=====================
Mark Roddy
Windows 2003/XP/2000 Consulting
Hollis Technology Solutions 603-321-1032
www.hollistech.com
markr@hollistech.com

"Venkat" <Venkat@discussions.microsoft.com> wrote in message
news:BE16FCB6-D69C-4697-9CAA-C7823E30834A@microsoft.com...
> why shldnt one use c functions such strcmp, stricmp in kernel mode?
> venkat

Top

Re: c funcs by Doron

Doron
Thu Jul 15 09:29:31 CDT 2004

because alot of these functions do not take the buffer length as an input
parameter and will happily touch invalid pointers if the strings are not
fully and correctly formed. use ntstrsafe.h instead.

d

--
Please do not send e-mail directly to this alias. this alias is for
newsgroup purposes only.
This posting is provided "AS IS" with no warranties, and confers no rights.

"Venkat" <Venkat@discussions.microsoft.com> wrote in message
news:BE16FCB6-D69C-4697-9CAA-C7823E30834A@microsoft.com...
> why shldnt one use c functions such strcmp, stricmp in kernel mode?
> venkat

Top