GNU Linux Hardware Emulation with Python

Talk: https://www.youtube.com/watch?v=UhLP0TJg5T8

With the kernel inotify feature, the D-Bus mocker library and the udev monitoring we try to detect the different events that occours when you're using a specific set of connected devices.

Then we try to mimic these devices investigating also the kernel drivers if necessary.

At the end we're ready to connect the simulation routines to our testing procedure.

Transcript

1. GNU/LINUX HARDWARE EMULATION
 WITH PYTHON Stefano Cotta Ramusino <whitone@gmail.com>! 
 22 . 07 . 2014
2. OH NO!! WHAT CAN I DO? Do want to test your connection code
 with a WiFi/GSM network
 …
 but you haven’t any dongle? Stefano Cotta Ramusino <whitone@gmail.com> Page 1/10
3. OH NO!! WHAT CAN I DO? Do you want to check your software notification when battery is low
 …
 but you’re testing your application
 on your desktop? Stefano Cotta Ramusino <whitone@gmail.com> Page 2/10
4. OH NO!! WHAT CAN I DO? Do you want to manipulate the data coming from a device
 …
 but you’ve lend it to someone else? Stefano Cotta Ramusino <whitone@gmail.com> Page 3/10
5. YOU’RE MY SALVATION No problem
 
 you can emulate all these hardware with
 
 Python ! Stefano Cotta Ramusino <whitone@gmail.com> Page 4/10
6. GNU/LINUX ARCHITECTURE Kernel Stefano Cotta Ramusino <whitone@gmail.com> Page 5/10 D-Bus Daemon udev Hardware inotify Software to Test
7. HARDWARE EMULATION Stefano Cotta Ramusino <whitone@gmail.com> Page 6/10 Kernel D-Bus Daemon inotify D-Bus Mock Emulated Hardware Software to Test
8. LIBRARIES pyinotify! dbus-python! python-dbusmock! pyudev Stefano Cotta Ramusino <whitone@gmail.com> Page 7/10
9. D-BUS SERVICE class DBusService(dbus.service.Object):
 def __init__(self):
 name = dbus.service.BusName('test.service', bus = dbus.SessionBus())
 dbus.service.Object.__init__(self, bus_name, '/test/service')
 
 @dbus.service.method('test.service')
 def hello(self):
 return 'Hello World!' Stefano Cotta Ramusino <whitone@gmail.com> Page 7/10
10. D-BUS MOCK wifi = dbusmock.AddWiFiDevice('MyWiFi', 'wlan0', DeviceState.ACTIVATED)! dbusmock.AddAccessPoint(wifi, 'MyAcccessPoint', 'MyAP', '00:11:22:33:44:55', …)! dbusmock.AddWiFiConnection(wifi, 'MyConnection', 'MyAP', …) Stefano Cotta Ramusino <whitone@gmail.com> Page 8/10
11. INOTIFY wm = pyinotify.WatchManager()! wm.add_watch(path, pyinotify.IN_OPEN | pyinotify.IN_CLOSE_WRITE) Stefano Cotta Ramusino <whitone@gmail.com> Page 9/10
12. CONTACT Stefano Cotta Ramusino! whitone@gmail.com! @stefano_cotta Stefano Cotta Ramusino <whitone@gmail.com> Page 10/10