# sudo apt-get install python-scapy tcpdump tcpreplay wireshark

# Note that wireshark prompts during installation if non-root users
# should be allowed to perform packed capture.

from scapy.all import *
import os
#import requests

DASH_MAC_ADDRESS=os.environ.get('DASH_MAC_ADDRESS')
DASH_INTERFACE=os.environ.get('DASH_INTERFACE')
#URL_CALLBACK=os.environ.get('URL_CALLBACK')

def arp_display(pkt):
	print pkt[ARP].hwsrc + " " + pkt[ARP].psrc + " op:" + str(pkt[ARP].op)
	if pkt[ARP].op == 1: #who-has (request)
		if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
			if pkt[ARP].hwsrc == DASH_MAC_ADDRESS:
				#requests.get(URL_CALLBACK)
				print "ARP from " + pkt[ARP].hwsrc
			else:
				print "ARP Probe from unknown device: " + pkt[ARP].hwsrc
			# end if
		# end if
	# end if
# end apr_display


#while True:
#	try:
#		print sniff(prn=arp_display, iface="eth0", filter="arp", store=0, count=10)
#	except:
#		pass
#	# end try
# end while

print sniff(prn=arp_display, iface=DASH_INTERFACE, filter="arp", store=0, count=10)