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# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, print_function, unicode_literals
import socket
import sys
PY2 = sys.version_info[0] == 2
string_types = basestring if PY2 else str # noqa
# Python 2 doesn't have socket.if_nametoindex so we need to implement it manually
if PY2:
import ctypes
import ctypes.util
libc = ctypes.CDLL(ctypes.util.find_library('c'))
def if_nametoindex(name):
"""
Return the logical index number of the given interface name.
"""
if not isinstance(name, string_types):
raise TypeError("Expected string type, got '{}'".format(type(name)))
rc = libc.if_nametoindex(name)
if rc == 0:
raise OSError("no interface with this name '{}'".format(name))
return rc
else:
if_nametoindex = socket.if_nametoindex
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
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