How to cancel a TDI_RECEIVE_DATAGRAM IRP

NTDEV
1

Hi all,

I have a driver in which I make extensive use of TDI to send and receive UDP
packets. I have come upon a problem that I can’t find an answer to in the
documentation anywhere. Suppose I issue a TDI_RECEIVE_DATAGRAM IRP (by using
TdiBuildReceiveDatagram and then IoCallDriver). I then find out that I will
never receive the datagram that I issued the receive for. How do I “undo”
the TDI_RECEIVE_DATAGRAM IRP. Can I simply call IoCancelIrp, or is there an
official way to do this?

Thanks,

Don

2

You can avoid using this IRP at all and rely on the
ClientEventReceiveDatagram instead

“Don” wrote in message
news:…
> Hi all,
>
> I have a driver in which I make extensive use of TDI to send and receive UDP
> packets. I have come upon a problem that I can’t find an answer to in the
> documentation anywhere. Suppose I issue a TDI_RECEIVE_DATAGRAM IRP (by using
> TdiBuildReceiveDatagram and then IoCallDriver). I then find out that I will
> never receive the datagram that I issued the receive for. How do I “undo”
> the TDI_RECEIVE_DATAGRAM IRP. Can I simply call IoCancelIrp, or is there an
> official way to do this?
>
> Thanks,
>
> Don
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
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