import sys, subprocess, serial
if len(sys.argv) != 3:
	print "syntax: " + sys.argv[0] + " <Network Interface> <Serial Interface>\n" 
	exit()
try:
	ser = serial.Serial(sys.argv[2], 9600)
except serial.SerialException:
	print "Error: Could not setup Serial Port!"
	sys.exit()
ettercap = subprocess.Popen("ettercap -i " + sys.argv[1] + " -TQP arp_cop //", shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
try:
	while 1:
		inPut = ettercap.stdout.readline()
		inPut = inPut.split(' ')
		for msg in inPut:
			if msg == "(WARNING)":
				print "Arp Poisoning Detected!"
				ser.write('A')
except:
	ser.write('R')
	print "Terminated!"
#out = ettercap.communicate('q')[0]
#print "Done!"