1#!/usr/bin/env python3
2#
3#  Copyright (c) 2019, 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:
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9#     notice, this list of conditions and the following disclaimer.
10#  2. Redistributions in binary form must reproduce the above copyright
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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
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24#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27#  POSSIBILITY OF SUCH DAMAGE.
28
29import wpan
30
31# -----------------------------------------------------------------------------------------------------------------------
32# Test description:
33#
34# This test covers a situation where a single parent exists in network with poor link quality ensuring the child
35# can attach the parent.
36
37test_name = __file__[:-3] if __file__.endswith('.py') else __file__
38print('-' * 120)
39print('Starting \'{}\''.format(test_name))
40
41# -----------------------------------------------------------------------------------------------------------------------
42# Creating `wpan.Nodes` instances
43
44speedup = 4
45wpan.Node.set_time_speedup_factor(speedup)
46
47parent = wpan.Node()
48child = wpan.Node()
49
50# -----------------------------------------------------------------------------------------------------------------------
51# Init all nodes
52
53wpan.Node.init_all_nodes()
54
55# -----------------------------------------------------------------------------------------------------------------------
56# Test implementation
57
58parent.form("network")
59
60# Create a poor link between child and parent using MAC fixed RSSI filter
61
62parent.set(wpan.WPAN_MAC_FILTER_FIXED_RSSI, '-99')
63parent.add(wpan.WPAN_MAC_FILTER_ENTRIES, child.get(wpan.WPAN_EXT_ADDRESS)[1:-1])
64
65child.set(wpan.WPAN_MAC_FILTER_FIXED_RSSI, '-99')
66child.add(wpan.WPAN_MAC_FILTER_ENTRIES, parent.get(wpan.WPAN_EXT_ADDRESS)[1:-1])
67
68# Ensure child can still attach the single low-link quality parent
69child.join_node(parent, node_type=wpan.JOIN_TYPE_END_DEVICE)
70
71# -----------------------------------------------------------------------------------------------------------------------
72# Test finished
73
74wpan.Node.finalize_all_nodes()
75
76print('\'{}\' passed.'.format(test_name))
77