/
elvisscan.py
executable file
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elvisscan.py
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#!/usr/bin/python
import netifaces
import os
from pythonwifi.iwlibs import Wireless
from scapy.all import *
import time
import threading
import json
import datetime
class HistoryElement:
def __init__(self,ring,rset,moment):
self.ring=ring
self.rset=list(rset)
self.rset.sort()
self.when=moment
class Client:
def __init__(self,mac):
self.mac=mac
self.lastseen={}
self.lastseen["home"]=time.time()
self.ring="inner"
self.possible="inner"
self.reexamine = False
self.outerset = set()
self.middleset = set()
self.history = list()
s = set()
s.add("home")
self.addhistory("inner",s,time.time())
self.report("non","inner",s,time.time())
def addhistory(self,ring,rset,moment):
self.history.append(HistoryElement(ring,rset,moment))
self.history=self.history[-10:]
def report(self,oldring,ring,rset,moment):
dt = datetime.datetime.fromtimestamp(int(moment)).strftime('%Y-%m-%d %H:%M:%S')
print dt,self.mac,
if ring != oldring:
if oldring == "missing":
print " reapeared in the " + ring + " ring.",
else:
if ring == "missing":
print " not seen sinse 30 minutes",
else:
print " went from ",oldring," to ",ring," ring.",
else :
print "remains in ",ring," ring.",
if ring == "outer" or ring == "middle":
print "Access points :", list(rset),
print
def home(self):
#Seen by own access point
self.lastseen["home"]=time.time()
s = set()
s.add("home")
self.newring("inner",s,time.time())
def mon(self):
#Seen by monitor (us)
self.lastseen["mon"]=time.time()
if self.ring != "inner":
s = set()
s.add("mon")
self.newring("middle",s,time.time())
else:
if self.reexamine == False or self.possible != "middle":
self.reexamine = True
self.possible = "middle"
def other(self,other):
#Seen by some nearby access point
self.lastseen[other]=time.time()
if self.ring == "missing":
s = set()
s.add(other)
self.newring("outer",s,time.time())
else:
if self.reexamine == False or self.possible != "outer":
self.reexamine = True
def tick(self):
now = time.time()
newest = 0
last = None
for key in self.lastseen.keys():
if self.lastseen[key] > newest:
newest = self.lastseen[key]
last = key
if now - newest > 1800:
self.newring("missing",set(),newest)
else:
if self.reexamine == True and now - newest > 3:
aplist = set()
windowstart = newest - 4
for key in self.lastseen.keys():
if self.lastseen[key] > windowstart:
aplist.add(key)
newring = "outer"
if "mon" in aplist:
newring = "middle"
if "home" in aplist:
newring = "inner"
self.newring(newring,aplist,newest)
def newring(self,ring,rset,moment):
updated = False
oldring = self.ring
if ring != self.ring:
self.ring = ring
updated = True
if ring == "outer":
if rset != self.outerset:
self.outerset = rset
updated = True
if ring == "middle":
if rset != self.middleset:
self.middleset = rset
updated = True
if updated == True:
self.addhistory(ring,rset,moment)
self.report(oldring,ring,rset,moment)
self.reexamine = False
def asobj(self):
obj = dict()
obj["mac"] = self.mac
obj["ring"] = self.ring
obj["lastseen"] = self.lastseen
obj["history"] = list()
for event in self.history:
subobj = dict()
subobj["when"] = event.when
subobj["ring"] = event.ring
subobj["aps"] = event.rset
obj["history"].append(subobj)
return obj
class ChipWifi:
def __init__(self):
self.clients = dict()
w = Wireless("wlan0")
ap = w.getAPaddr()
self.AP = ap.lower()
self.freq=w.getFrequency()
self.ifname = "wlan1"
os.system("/sbin/ifconfig %s down" % (self.ifname))
self.wifi = Wireless(self.ifname)
self.oldmode = self.wifi.getMode()
self.wifi.setMode("monitor")
os.system("/sbin/ifconfig %s up" % (self.ifname))
self.wifi.setFrequency(self.freq)
def __del__(self):
os.system("/sbin/ifconfig %s down" % (self.ifname))
self.wifi.setMode(self.oldmode)
def run(self):
sniff(iface=self.ifname,prn=self.packet,store = 0)
def probe(self,client):
if client in self.clients.keys():
self.clients[client].mon()
def presponse(self,server,client):
if client in self.clients.keys():
if server == self.AP:
self.clients[client].home()
else:
self.clients[client].other(server)
def activeclient(self,client):
if not client in self.clients.keys():
self.clients[client]=Client(client)
self.clients[client].home()
def packet(self,p):
if p.haslayer(Dot11ProbeReq):
if p[Dot11].addr2 in self.clients:
self.probe(p[Dot11].addr2)
else:
if p.haslayer(Dot11ProbeResp):
self.presponse(p[Dot11].addr2,p[Dot11].addr1)
else:
if p[Dot11].addr1 == self.AP and p[Dot11].addr2 != None and p[Dot11].type == 2:
self.activeclient(p[Dot11].addr2)
def tick(self):
for mac in self.clients.keys():
self.clients[mac].tick()
data = list()
for mac in self.clients.keys():
data.append(self.clients[mac].asobj())
content = json.dumps(data,indent=4, separators=(',', ': '))
with open('elvisscan.json', 'w') as f:
f.write(content)
def tick():
global wifi
threading.Timer(5.0, tick).start()
wifi.tick()
wifi = ChipWifi()
tick()
wifi.run()