source: ipk/source.sh4/swapnetwork_wlan_400/var/etc/Wireless/wlanscan.py@ 17547

import string
import cPickle
import sys
sys.path.append("/usr/lib/enigma2/python/Plugins/SystemPlugins/WirelessLan")
sys.path.append("/usr/lib/enigma2/python")
from iwlibs import Wireless, Iwscan
from string import maketrans, strip

a = ''; b = ''
scanfile="/tmp/wlanscan"
for i in range(0, 255):
        a = a + chr(i)
        if i < 32 or i > 127:
                b = b + ' '
        else:
                b = b + chr(i)
try:
        iface=sys.argv[1];
except:
        msg = "No interface to scan\n";
        o_file=open(scanfile,"w");
        o_file.write(msg);
        o_file.close();
        print msg;
        sys.exit();

asciitrans = maketrans(a, b)
ifobj = Wireless(iface) # a Wireless NIC Object
stats, quality, discard, missed_beacon = ifobj.getStatistics()
snr = quality.signallevel - quality.noiselevel
scanresults = ifobj.scan()

if scanresults is not None:
        aps = {}
        for result in scanresults:

                bssid = result.bssid

                encryption = map(lambda x: hex(ord(x)), result.encode)

                if encryption[-1] == "0x8":
                        encryption = True
                else:
                        encryption = False

                extra = []
                for element in result.custom:
                        element = element.encode()
                        extra.append( strip(element.translate(asciitrans)) )

                if result.quality.sl is 0 and len(extra) > 0:
                        begin = extra[0].find('SignalStrength=')+15

                        done = False
                        end = begin+1

                        while not done:
                                if extra[0][begin:end].isdigit():
                                        end += 1
                                else:
                                        done = True
                                        end -= 1

                        signal = extra[0][begin:end]
                        #print "[Wlan.py] signal is:" + str(signal)

                else:
                        signal = str(result.quality.sl)

                aps[bssid] = {
                        'active' : True,
                        'bssid': result.bssid,
                        'channel': result.frequency.getChannel(result.frequency.getFrequency()),
                        'encrypted': encryption,
                        'essid': strip(result.essid.translate(asciitrans)),
                        'iface': iface,
                        'maxrate' : result.rate[-1],
                        'noise' : result.quality.getNoiselevel(),
                        'quality' : str(result.quality.quality),
                        'signal' : signal,
                        'custom' : extra,
                }
                print aps[bssid]
        cPickle.dump(aps, open(scanfile, 'wb'))