Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results
Before Posting...
Please check out the Community Guidelines in the Announcements and Administration Category.More Info on Driver Writing and Debugging
The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.
Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/
METHOD_IN_DIRECT
Hello.
Can I use METHOD_IN_DIRECT and METHOD_OUT_DIRECT together. When I want to send and receive buffer from driver.
like this
define MY_IOCTL CTL_CODE(FILE_DEVICE_NETWORK, 0x800, METHOD_IN_DIRECT | METHOD_OUT_DIRECT, FILE_ANY_ACCESS)
The CTL_CODE macro defines 2 bits for this, so I think we can't assign both methods. Then, how to send and receive buffers to and from the driver using a single IRP.
Howdy, Stranger!
| Upcoming OSR Seminars | ||
|---|---|---|
| OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead! | ||
| Kernel Debugging | 30 January 2023 | Live, Online |
| Developing Minifilters | 20 March 2023 | Live, Online |
| Internals & Software Drivers | 17 April 2023 | Live, Online |
| Writing WDF Drivers | 22 May 2023 | Live, Online |
Comments
If it is writable it is readable.
No, you can't use them together. Those are not bits, they are enumerations. In fact, that particular combination would be very bad, because METHOD_IN_DIRECT (1) ored with METHOD_OUT_DIRECT (2) gives you 3, which is METHOD_NEITHER. And nobody wants that.
However, for all practical purposes, the two are identical.
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.
Thanks everyone