if_nametoindex, if_indextoname functions for python using ctypes

I needed to use if_nametoindex, if_indextoname functions for one of my packet capturing programs. So, here is my python wrapper for those functions using ctypes.

	import ctypes
	import ctypes.util
	libc = ctypes.CDLL(ctypes.util.find_library('c'))
	def if_nametoindex (name):
	if not isinstance (name, str):
	raise TypeError ('name must be a string.')
	ret = libc.if_nametoindex (name)
	if not ret:
	raise RunTimeError ("Invalid Name")
	return ret
	def if_indextoname (index):
	if not isinstance (index, int):
	raise TypeError ('index must be an int.')
	libc.if_indextoname.argtypes = [ctypes.c_uint32, ctypes.c_char_p]
	libc.if_indextoname.restype = ctypes.c_char_p
	ifname = ctypes.create_string_buffer (32)
	ifname = libc.if_indextoname (index, ifname)
	if not ifname:
	raise RuntimeError ("Inavlid Index")
	return ifname

view raw if_nametoindex, if_indextoname.py hosted with ❤ by GitHub

PS: You will need this only for python2.x. Those functions are available in socket module starting since python 3.3.