1# $OpenBSD: IfInfo.py,v 1.2 2020/12/25 14:25:58 bluhm Exp $
2
3# Copyright (c) 2017 Florian Obser <florian@openbsd.org>
4# Copyright (c) 2020 Alexander Bluhm <bluhm@openbsd.org>
5#
6# Permission to use, copy, modify, and distribute this software for any
7# purpose with or without fee is hereby granted, provided that the above
8# copyright notice and this permission notice appear in all copies.
9#
10# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18import pprint
19import subprocess
20import re
21
22class IfInfo(object):
23	def __init__(self, ifname):
24		self.ifname = ifname
25		self.mac = None
26		self.ll = None
27		self.out = subprocess.check_output(['ifconfig', ifname],
28		    encoding='UTF-8')
29		self.parse(self.out)
30
31	def __str__(self):
32		return "{0}: mac: {1}, link local: {2}".format(self.ifname,
33		    self.mac, self.ll)
34
35	def parse(self, str):
36		lines = str.splitlines()
37		for line in lines:
38			lladdr = re.match("^\s+lladdr (.+)", line)
39			link_local = re.match("^\s+inet6 ([^%]+)", line)
40			if lladdr:
41				self.mac = lladdr.group(1)
42				continue
43			elif link_local:
44				self.ll = link_local.group(1)
45
46			if self.mac and self.ll:
47				return
48