I’m very happy to say, this is a simple project, to get working in its most basic form. Note, I said it’s most basic form so no hate mail on the fact that this is nothing more than a quick script! There are plans to actually go deeper, make this open to more than my device, not use already existing programs, etc. But for the basic concept and starter, I’ve made this program use gpsbabel to get the gps information and iwlist to get the network information. I had started with pywifi but found this to be a problem because there was an overbound error. This bug will be reported, it seems it has a problem with converting an integer to a float on a 64bit machine.
So with no futher ado, here is the script:
#!/usr/bin/env python import os, re, time # DEATH FUNCTION def die(msg): print ' [*] ERROR: %s' % msg exit(1) # ENSURE WE ARE ROOT def checkroot(): if os.getuid() != 0: die('Run this program as root.') return # GET NETWORK INFO def getessid(dev): nets = os.popen('iwlist %s scan' % dev).read() pat = re.compile(r'ESSID:".*"') mess = re.findall(pat, nets) found=  for find in mess: found.append(find.split('"').split('"')) return found # GET GPS INFO def getposition(dev): pos = os.popen('gpsbabel -i garmin,get_posn -f %s' % dev).read() pos = pos.splitlines().split(' ') return [pos,pos] # RUN IT def main(): checkroot() found = getessid('eth1') pos = getposition('/dev/ttyUSB0') for find in found: print 'ESSID: %s @ %s | %s' % (find,pos,pos) exit(0) if __name__ == '__main__': main()
So what you see here is that I’m using os.popen() to call my programs to draw data. Unfortunately, iwlist is painfully slow, to the point there’d be a five second delay on some slower machines between the call and having the data ready. This is why I want to develop the application to not be dependent on other programs, but for the time being, this works as proof of concept in the data gathering stage. It’s now just a matter of adjusting the code to run this constantly and load data to an overlay when entering and leaving an ESSID’s area.
Any comments for improvements? Don’t forget, you can join this project any time on SourceForge!