Peke_Ito

Nagsasanay ako sa Linux system at umuunlad ng kernel.

Instructions

Hello.ko and myTestDeviceDriver.ko

1.  make
2.  sudo insmod 'driver'.ko
3.  dmesg | tail -n 10
4.  sudo mknod /dev/'driver' c <num> 0
5.  sudo rmmod <driver>.ko
6. rm /dev/'driver'

blinkDeviceDriver.ko

1.  make
2.  sudo rmmod hid_generic
3.  sudo rmmod usbhid
4.  sudo rmmod hid_led
5.  sudo rmmod hid
6.  sudo insmod blinkDeviceDriver.ko

Key Logger v1.0

BRIEF

• Creates /dev/notakeylogger to communicate with a user
• Registers a module with the keyboard driver's notification list
• Translates those scan codes into a buffer backing /dev/notakeylogger
• Key strokes may be read from /dev/notakeylogger

USAGE

1. cd Modules/myKeyLogger; make clean; make lkm
2. sudo insmod myKeyLoggingModule.ko
3. Type things
4. sudo cat /dev/notakeylogger
5. Type more things
6. sudo cat /dev/notakeylogger
7. sudo rmmod myKeyLoggingModule

To Do

[X] Hello World lkm
[X] Basic Character Driver
[/] "Unk" USB Device Driver (blink(1), RGB LED)
    [ ] Get/create/allocate struct usb_interface for the device (...but how?)
    [ ] Convert between struct usb_interface and struct usb_device using interface_to_usbdev()? (see: Ch 13 Pg 332)
    [ ] Create an URB w/ usb_alloc_urb() (Init?)
    [ ] Fill in URB w/ usb_fill_int_urb() (Init?)
    [ ] Send data w/ usb_submit_urb() (Probe?  New function?)
    [ ] Handle URB Completion (see: Ch 13 - Completing Urbs: The Completion Callback Handler)
    [ ] NOTE: Continue reading Ch 13 at "Writing a USB Driver"
    [ ] Dynamically read in the three strings (Make, Model, Serial #)
[ ] "Unk" USB Device Driver (Nerf-style turret)
[ ] [LKM to Intercept Syscalls](https://dl.packetstormsecurity.net/docs/hack/LKM_HACKING.html#II.1.)
[ ] Manage concurrent execution
    * include <linux/sched.h>
    * printk(KERN_INFO "The process is \"%s\" (pid %i)\n", current->comm, current->pid);
    * See: Linux Device Drivers Chapter 2
[ ] Read [this](https://www.kernel.org/doc/html/v4.13/driver-api/usb/hotplug.html) to attempt to discover a reason why blinkDeviceDriver is failing to 'hotplug'

Resources

• http://opensourceforu.com/2011/10/usb-drivers-in-linux-1/
• http://matthias.vallentin.net/blog/2007/04/writing-a-linux-kernel-driver-for-an-unknown-usb-device/
• https://kernel.readthedocs.io/en/sphinx-samples/writing_usb_driver.html
• http://www.linuxjournal.com/article/7353
• https://www.safaribooksonline.com/library/view/linux-device-drivers/0596005903/ch13.html
• http://www.tldp.org/HOWTO/html_single/Module-HOWTO/
• http://derekmolloy.ie/kernel-gpio-programming-buttons-and-leds/
• http://www.beyondlogic.org/usbnutshell/usb6.shtml
• http://www.usbmadesimple.co.uk/ums_4.htm
• https://msdn.microsoft.com/en-us/library/windows/hardware/ff539261(v=vs.85).aspx
• https://stackoverflow.com/questions/9505105/usb-getting-data-from-a-device
• https://github.com/todbot/blink1
• Linux Device Drivers 3rd Edition
• Write/Read USB Device
• USB Device Driver slideshow by Michael Mitchell
• Peke_Ito/Kernels/linux-4.4.79/Documentation/usb/URB.txt
• Kernel Data Types
• USB Descriptor Tables
• USB Endpoint Descriptor Details
• USB Interrupt Transfers in a Nutshell
• USB Made Simple
• USB Complete 3rd Edition
• USB HID Report Descriptors
• Reverse Engineering SET_REPORT Packets
• Universal Serial Bus Specification v2.0
• Most drivers do not use 'usb_fill_control_urb', as it is much simpler to use the synchronous API calls as described in Chapter 13 Section 5
• Read and Write USB Device
• struct urb Man Page
• The Linux Kernel Module Programming Guide
• LKM Online Reading List - Referenced at the end of the The Linux Kernel Module Programming Guide
• (nearly) Complete Linux Loadable Kernel Modules
• Interrupt vs Polling Chararacter Drivers
• Common Device Driver Functionality
• Phrack - an ezine written by and for hackers

Ideas

• Phantom Keystroker from ThinkGeek