1#!/usr/bin/env python3
2#
3#  Copyright (c) 2020, The OpenThread Authors.
4#  All rights reserved.
5#
6#  Redistribution and use in source and binary forms, with or without
7#  modification, are permitted provided that the following conditions are met:
8#  1. Redistributions of source code must retain the above copyright
9#     notice, this list of conditions and the following disclaimer.
10#  2. Redistributions in binary form must reproduce the above copyright
11#     notice, this list of conditions and the following disclaimer in the
12#     documentation and/or other materials provided with the distribution.
13#  3. Neither the name of the copyright holder nor the
14#     names of its contributors may be used to endorse or promote products
15#     derived from this software without specific prior written permission.
16#
17#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
21#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27#  POSSIBILITY OF SUCH DAMAGE.
28#
29
30import socket
31import struct
32import subprocess
33import sys
34import time
35
36from ipaddress import ip_address
37
38
39def get_maddrs(if_name):
40    lines = subprocess.run(['ot-ctl', '-I', if_name, 'ipmaddr'], stdout=subprocess.PIPE).stdout.decode().split()
41    return [ip_address(l) for l in lines if l.startswith('ff')]
42
43
44def main():
45    group = 'ff02::158'
46    if_index = int(sys.argv[1])
47    if_name = sys.argv[2]
48
49    with socket.socket(socket.AF_INET6, socket.SOCK_DGRAM) as s:
50        s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_IF, if_index)
51        s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_JOIN_GROUP,
52                     struct.pack('16si', socket.inet_pton(socket.AF_INET6, group), if_index))
53        time.sleep(2)
54        maddrs = get_maddrs(if_name)
55        print(maddrs)
56        if not any(addr == ip_address(group) for addr in maddrs):
57            return -1
58
59        s.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_LEAVE_GROUP,
60                     struct.pack('16si', socket.inet_pton(socket.AF_INET6, group), if_index))
61
62        time.sleep(2)
63        maddrs = get_maddrs(if_name)
64        print(maddrs)
65        if any(addr == ip_address(group) for addr in maddrs):
66            return -1
67    return 0
68
69
70if __name__ == '__main__':
71    exit(main())
72