Re: how to determine if given IRP is completed?
- From: "Doron Holan [MS]" <doronh@xxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 4 Jun 2005 10:26:55 -0700
look at the sources for devcon, which basically is a cmd line device
manager-like tool. from there you can update the device's drivers.
d
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"Isajanyan" <Isajanyan@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:2277B743-1807-4EE7-949C-F663BDF2E3D5@xxxxxxxxxxxxxxxx
> Doron, thank you very much for your answer. Ok, so it seems there is no
> way
> to determine if the IRP is completed and my approach was wrong.
> I considered using kbfiltr, but the installation of that driver seems to
> be
> different (it requires using device manager, which is unacceptable in my
> case). Could you please give me some info on how to install it
> programmatically either using inf file or without (if possible)?
> Thanks again
>
>
> "Doron Holan [MS]" wrote:
>
>> use kbfiltr instead. for your scheme to work, you need to catch the read
>> irp, send your own read irp down teh stack and complete teh caught read
>> irp
>> when either
>> a) you have your own data to report
>> or
>> b) the lower stack has data to report via the irp you sent
>>
>> in either case, if there is no pending irp, you have to store teh data in
>> a
>> buffer and then complete the incoming read irp immediately if you have
>> stored data.
>>
>> all of this complexity goes away if you use kbfiltr and just invoke the
>> upper service callback routine when you have data to report.
>>
>> 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.
>>
>>
>> "Isajanyan" <Isajanyan@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>> news:077569EE-7C24-4032-85A2-918AE35112BE@xxxxxxxxxxxxxxxx
>> > Hi,
>> >
>> > Could anyone tell me how to determine if given IRP is completed?
>> > Here is my problem: I have a keyboard filter driver based on Ctrl2Cap
>> > from
>> > sysinternals.
>> > I need it to generate keystrokes. In order to do that I hold a global
>> > pointer to the last IRP passed to the lower driver in stack and if
>> > there
>> > is a
>> > need to generate a keystroke I complete that IRP, the IO manager
>> > creates
>> > and
>> > sends another IRP to me which I fill with the data, complete and return
>> > without passing it down (is this method right by the way, if not which
>> > is
>> > the
>> > right method?). The bugcheck sometimes occur when I complete the
>> > globally
>> > saved IRP which has been already completed by lower driver in stack,
>> > that's
>> > why I'm thinking of checking somehow if IRP has been completed and
>> > complete
>> > it only if it has not.
>> >
>> > Any suggestions are welcome, thanks to everyone.
>>
>>
>>
.
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