MySoundDriver

This is my second software kerne driver project. a WDM non-PnP kernel driver with a user-mode application that used to play a sound when a device was plagged-in or out to the USB-port, You choose the audio file to be played.

The internal structure

In this project I faced a lot of new things. starting first with the driver it self:

• first I signed for PnP notifications with the USB port GUID to make the PnP manager send a notification when there's a device plugged in or out to that port
• I used also the Inverted Call model to make the driver can notify the user-mode application when there's an event. So I turned all the incoming Irps from user-mode app into pending state then queued it using the Cancel-Safe framework with LIST_ENTRY data structure. and when the call-back routine of the PnP notification runs it dequeue one of the queued Irps and complete it.
• Inside the User-mode application, I made it multi-threaded application that the main thread creates the IOCP (I/O Completion Port), control our driver using our IOCTL code, and runs the rest of the program. while other thread waits for that IOCP attached to our device so when it completes and I/O operation it dequeues it and runs the specified sound file then repeat.

I'm going to write some articles on my portfolio that describe those new topics I have learned.

How to run it

First, you need to install the driver as a service using the sc.exe tool. Then start it and also start the usermode application. it will print to you the help page to choose :

• 1 -> to send an Irp to the driver
• 2 -> to exit

How to change the sound

To change the sound file. just go the user-mode app and in the line 93 put your full path to the file. It's recommended to make the file name with no spaces within it. And don't forget to put the escape characters when you write the path.

NOTE: You can monitor the output from the driver to see how many Pending Irps and which function is running now..etc. see it from any tool that prints Debugging output like Dbgview from sysinternals.

if you have any question or anything related don't wait to message me :). SEE YA

Some future changes needed

• make the user-mode app send Irps automatically.
• add PeekContext to Irps to distinguish between the different events (plugged-in or out).
• signing the driver