simplesniffer.py

#!/usr/bin/env python3
import sys,os
import stack.rawif
import stack.process

#sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
class Unbuffered(object):
   def __init__(self, stream):
       self.stream = stream
   def write(self, data):
       self.stream.write(data)
       self.stream.flush()
   def writelines(self, datas):
       self.stream.writelines(datas)
       self.stream.flush()
   def __getattr__(self, attr):
       return getattr(self.stream, attr)

sys.stdout = Unbuffered(sys.stdout)

iface = "eth0"

if len(sys.argv) > 1:
	iface = sys.argv[1]

raw = stack.rawif.bringupraw(iface=iface,promisc=True)
pe = stack.process.packetEngine()
while True:
	# Read an Ethernet frame that's been sent to this device.
	ethframe = stack.rawif.readrawethframe(raw)
	try:
		info,out = pe.processEth(ethframe)
		for i in info: print(i)
		print("============")
	except stack.process.IgnorePacket as e:
		pass
	except BrokenPipeError as e:
		exit(0)