Nov-08-2016, 11:53 PM
Hi guys,
I'm trying to use scapy for the first time and I picked up a script that monitors Probe requests,
Has anyone ever face this behaviour?
Thanks
I'm trying to use scapy for the first time and I picked up a script that monitors Probe requests,
from scapy.all import * PROBE_REQUEST_TYPE=0 PROBE_REQUEST_SUBTYPE=4 def PacketHandler(pkt): if pkt.haslayer(Dot11): if pkt.type==PROBE_REQUEST_TYPE and pkt.subtype == PROBE_REQUEST_SUBTYPE: PrintPacket(pkt) def PrintPacket(pkt): print "Probe Request Captured:" try: extra = pkt.notdecoded except: extra = None if extra!=None: signal_strength = -(256-ord(extra[-4:-3])) else: signal_strength = -100 print "No signal strength found" print "Target: %s Source: %s SSID: %s RSSi: %d"%(pkt.addr3,pkt.addr2,pkt.getlayer(Dot11ProbeReq).info,signal_strength) ai def main(): from datetime import datetime print "[%s] Starting scan"%datetime.now() print "Scanning for:" print "\n".join(mac for mac in WHITELIST) sniff(iface=sys.argv[1],prn=PacketHandler) if __name__=="__main__": main()The challenge I'm facing is with the signal strength,
signal_strength = -(256-ord(extra[-4:-3]))The output I get for every probe request is -256.
Has anyone ever face this behaviour?
Thanks