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openthread/tests/nexus/verify_1_2_LP_7_2_2.py
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Jonathan Hui 406496f4de [nexus] implement test 1.2.LP.7.2.2 for Forward Series Probing (#12626) 
This commit implements Nexus test 1.2.LP.7.2.2 to verify that the
DUT (Leader) can successfully support a minimum of 6 simultaneous
children (3 SEDs and 3 SSEDs) performing link metrics operations.

Specifically, the test verifies that:
- The DUT correctly handles simultaneous Forward Series Link Metrics
  Management Requests and Enhanced ACK probing requests.
- The DUT properly aggregates metrics for multiple concurrent series
  with different configurations (MAC Data Requests, Link Layer data
  frames, LQI, RSSI, and Link Margin).
- Aggregated results are accurately reported in MLE Data Responses
  when queried by multiple children.
- The DUT successfully provides link metrics in Enhanced ACKs for
  both SED and SSED children.

Changes:
- Added test_1_2_LP_7_2_2.cpp to implement the test logic, including
  node configuration, management requests, and data collection.
- Added verify_1_2_LP_7_2_2.py for automated PCAP verification of
  MLE TLVs and Enhanced ACK Vendor IEs.
- Updated verify_utils.py to include necessary layer fields for
  Link Metrics verification in pktverify.
- Registered the new test in CMakeLists.txt and run_nexus_tests.sh.
2026-03-06 09:36:01 -06:00

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#!/usr/bin/env python3
#
# Copyright (c) 2026, The OpenThread Authors.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the copyright holder nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
import sys
import os
# Add the current directory to sys.path to find verify_utils
CUR_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.append(CUR_DIR)
import verify_utils
from pktverify import consts
from pktverify.null_field import nullField
FORWARD_SERIES_FLAGS_MAC_DATA_REQUEST = 4
FORWARD_SERIES_FLAGS_ALL_DATA_FRAMES = 2
FORWARD_SERIES_FLAGS_CLEAR = 0
LM_QUERY_ID_SUB_TLV = 1
LM_QUERY_OPTIONS_SUB_TLV = 2
def _verify_ping(pkts, src_node, dst_node):
"""Helper to verify ICMPv6 Echo Request and Reply."""
_pkt = pkts.filter_ping_request(). \
filter_wpan_src64(src_node). \
filter_wpan_dst64(dst_node). \
must_next()
pkts.filter_ping_reply(identifier=_pkt.icmpv6.echo.identifier). \
filter_wpan_src64(dst_node). \
filter_wpan_dst64(src_node). \
must_next()
def _verify_forward_series_mgmt_req_res(pkts, src_node, dst_node, series_id, series_flags, metric_type_enum,
metric_enum, metric_l_flag):
"""Helper to verify a forward series management request and its response."""
pkts.filter_wpan_src64(src_node). \
filter_wpan_dst64(dst_node). \
filter_mle_cmd(consts.MLE_LINK_METRICS_MANAGEMENT_REQUEST). \
filter(lambda p: consts.LM_FORWARD_PROBING_REGISTRATION_SUB_TLV in p.mle.tlv.link_sub_tlv). \
filter(lambda p: series_id in p.mle.tlv.link_forward_series). \
filter(lambda p: p.mle.tlv.link_forward_series_flags == series_flags). \
filter(lambda p: metric_type_enum in p.mle.tlv.metric_type_id_flags.type). \
filter(lambda p: metric_enum in p.mle.tlv.metric_type_id_flags.metric). \
filter(lambda p: metric_l_flag in p.mle.tlv.metric_type_id_flags.l). \
must_next()
pkts.filter_wpan_src64(dst_node). \
filter_wpan_dst64(src_node). \
filter_mle_cmd(consts.MLE_LINK_METRICS_MANAGEMENT_RESPONSE). \
filter(lambda p: p.mle.tlv.link_status_sub_tlv == consts.LINK_METRICS_STATUS_SUCCESS). \
must_next()
def _verify_enhanced_ack_config_req_res(pkts, src_node, dst_node, enh_ack_flags, requested_type_ids):
"""Helper to verify Enhanced ACK configuration request and response."""
pkts.filter_wpan_src64(src_node). \
filter_wpan_dst64(dst_node). \
filter_mle_cmd(consts.MLE_LINK_METRICS_MANAGEMENT_REQUEST). \
filter(lambda p: consts.LM_ENHANCED_ACK_CONFIGURATION_SUB_TLV in p.mle.tlv.link_sub_tlv and \
p.mle.tlv.link_enh_ack_flags == enh_ack_flags and \
set(p.mle.tlv.link_requested_type_id_flags) == set(requested_type_ids)). \
must_next()
pkts.filter_wpan_src64(dst_node). \
filter_wpan_dst64(src_node). \
filter_mle_cmd(consts.MLE_LINK_METRICS_MANAGEMENT_RESPONSE). \
filter(lambda p: p.mle.tlv.link_status_sub_tlv == consts.LINK_METRICS_STATUS_SUCCESS). \
must_next()
def _verify_data_req_res_with_report(pkts, src_node, dst_node, series_id, metric_type_enum, metric_enum,
metric_l_flag):
"""Helper to verify data request for query and data response with report."""
pkts.filter_wpan_src64(src_node). \
filter_wpan_dst64(dst_node). \
filter_mle_cmd(consts.MLE_DATA_REQUEST). \
filter(lambda p: p.mle.tlv.query_id == series_id and \
LM_QUERY_OPTIONS_SUB_TLV not in p.mle.tlv.link_sub_tlv). \
must_next()
pkts.filter_wpan_src64(dst_node). \
filter_wpan_dst64(src_node). \
filter_mle_cmd(consts.MLE_DATA_RESPONSE). \
filter(lambda p: consts.LINK_METRICS_REPORT_TLV in p.mle.tlv.type and \
metric_type_enum in p.mle.tlv.metric_type_id_flags.type and \
metric_enum in p.mle.tlv.metric_type_id_flags.metric and \
metric_l_flag in p.mle.tlv.metric_type_id_flags.l). \
must_next()
def _verify_single_probe_req_res(pkts, src_node, dst_node, variable_len):
"""Helper to verify single probe request and Enhanced ACK response."""
pkts.filter_wpan_src64(src_node). \
filter_wpan_dst64(dst_node). \
filter(lambda p: p.wpan.version == 2). \
must_next()
pkts.filter_wpan_dst64(src_node). \
filter(lambda p: p.wpan.frame_type == consts.MAC_FRAME_TYPE_ACK and \
p.wpan.version == 2 and \
p.wpan.payload_ie.vendor.oui == consts.THREAD_IEEE_802154_COMPANY_ID and \
p.wpan.payload_ie.vendor.variable[0] == 0 and \
len(p.wpan.payload_ie.vendor.variable) == variable_len). \
must_next()
def verify(pv):
# 7.2.2 Forward Series Probing With Single Shot
#
# 7.2.2.1 Topology
# - Leader (DUT)
# - SED_1
# - SED_2
# - SED_3
# - SSED_1
# - SSED_2
# - SSED_3
#
# 7.2.2.2 Purpose & Definition
# The purpose of this test case is to ensure that the DUT can successfully support a minimum of 6 simultaneous
# children performing link metrics.
#
# Spec Reference | V1.2 Section
# ----------------------------------------|-------------
# Forward Series Probing With Single Shot | 4.11.3.2
pkts = pv.pkts
pv.summary.show()
LEADER = pv.vars['LEADER']
SED_1 = pv.vars['SED_1']
SED_2 = pv.vars['SED_2']
SED_3 = pv.vars['SED_3']
SSED_1 = pv.vars['SSED_1']
SSED_2 = pv.vars['SSED_2']
SSED_3 = pv.vars['SSED_3']
SERIES_ID_4 = 4
SERIES_ID_6 = 6
SERIES_ID_8 = 8
SERIES_ID_10 = 10
# Step 0: SSED_1,2,3 / SED_1,2,3
# - Description: Preconditions: SSED_1,2,3 - set CSLTimeout = 30s; SED_1 - set poll rate = 1s; SED_2 = set poll rate
# = 3s; SED_3 = set poll rate = 5s.
# - Pass Criteria: N/A.
print("Step 0: Preconditions: Set poll rates and CSL timeout.")
# Step 1: All
# - Description: Topology formation: DUT, SED_1, SED_2, SED_3, SSED_1, SSED_2, SSED_3. SSED_1,2,3 Preconditions: Set
# polling rate = 5s,.
# - Pass Criteria: N/A.
print("Step 1: Topology formation: DUT, SED_1, SED_2, SED_3, SSED_1, SSED_2, SSED_3.")
# Step 2: SED_1,2,3 / SSED_1,2,3
# - Description: Each device automatically attaches to the Leader (DUT).
# - Pass Criteria: N/A.
print("Step 2: Each device automatically attaches to the Leader (DUT).")
# Step 3: SED_1,2,3 / SSED_1,2,3
# - Description: Harness verifies connectivity by sending an ICMPv6 Echo Request from each device to the Leader
# (DUT).
# - Pass Criteria:
# - 3.1: The DUT MUST send an ICMPv6 Echo Reply to SED_1.
# - 3.2: The DUT MUST send an ICMPv6 Echo Reply to SED_2.
# - 3.3: The DUT MUST send an ICMPv6 Echo Reply to SED_3.
# - 3.4: The DUT MUST send an ICMPv6 Echo Reply to SSED_1.
# - 3.5: The DUT MUST send an ICMPv6 Echo Reply to SSED_2.
# - 3.6: The DUT MUST send an ICMPv6 Echo Reply to SSED_3.
print("Step 3: Harness verifies connectivity.")
for node in [SED_1, SED_2, SED_3, SSED_1, SSED_2, SSED_3]:
_verify_ping(pkts, node, LEADER)
# Step 4: SED_1
# - Description: Harness instructs the device to request a Forward Series Link Metric by sending a Link Metrics
# Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Forward Probing Registration Sub-TLV
# - Type = 3
# - Forward Series ID = 4
# - Forward Series Flags = 0x04
# - Bits 0,1 = 0
# - Bit 2 = 1 (Track MAC Data Request command frames)
# - Bits 3-7 = 0
# - Concatenation of Link Metric Type ID Flags=0x09
# - E = 0x00; L = 0x00
# - Type/Average Enum = 1 (Exponential Moving Avg)
# - Metric Enum = 1 (Layer 2 LQI)
# - Pass Criteria: N/A.
print("Step 4: SED_1 requests a Forward Series Link Metric ID 4.")
# Step 5: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SED_1 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 5: Leader responds to SED_1 with a Link Metrics Management Response.")
_verify_forward_series_mgmt_req_res(pkts, SED_1, LEADER, SERIES_ID_4, FORWARD_SERIES_FLAGS_MAC_DATA_REQUEST,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_LQI, 0)
# Step 6: SED_2
# - Description: Harness instructs the device to request a Forward Series Link Metric by sending a Link Metrics
# Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Forward Probing Registration Sub-TLV
# - Type = 3
# - Forward Series ID = 6
# - Forward Series Flags = 0x02
# - Bit 0 = 0
# - Bit 1 = 1 (Track Link Layer data frames)
# - Bits 2-7 = 0
# - Concatenation of Link Metric Type ID Flags=0x40
# - E = 0x00; L = 0x01
# - Type/Average Enum = 0 (count)
# - Metric Enum = 0 (# of PDUs received)
# - Pass Criteria: N/A.
print("Step 6: SED_2 requests a Forward Series Link Metric ID 6.")
# Step 7: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SED_2 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 7: Leader responds to SED_2 with a Link Metrics Management Response.")
_verify_forward_series_mgmt_req_res(pkts, SED_2, LEADER, SERIES_ID_6, FORWARD_SERIES_FLAGS_ALL_DATA_FRAMES,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_COUNT,
consts.LINK_METRICS_METRIC_TYPE_ENUM_PDU_COUNT, 1)
# Step 8: SSED_1
# - Description: Harness instructs device to request a Forward Series Link Metric by sending a Link Metrics
# Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Forward Probing Registration Sub-TLV
# - Type = 3
# - Forward Series ID = 8
# - Forward Series Flags = 0x02
# - Bit 0 = 0
# - Bit 1 = 1 (Track Link Layer data frames)
# - Bits 2-7 = 0
# - Concatenation of Link Metric Type ID Flags=0x0a
# - E = 0x00; L = 0x00
# - Type/Average Enum = 1 (Exponential Moving Avg)
# - Metric Enum = 2 (Link Margin)
# - Pass Criteria: N/A.
print("Step 8: SSED_1 requests a Forward Series Link Metric ID 8.")
# Step 9: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SSED_1 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 9: Leader responds to SSED_1 with a Link Metrics Management Response.")
_verify_forward_series_mgmt_req_res(pkts, SSED_1, LEADER, SERIES_ID_8, FORWARD_SERIES_FLAGS_ALL_DATA_FRAMES,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_LINK_MARGIN, 0)
# Step 10: SSED_2
# - Description: Harness instructs device to request a Forward Series Link Metric by sending a Link Metrics
# Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Forward Probing Registration Sub-TLV
# - Type = 3
# - Forward Series ID = 10
# - Forward Series Flags = 0x04
# - Bits 0,1 = 0
# - Bit 2 = 1 (Track MAC Data Request command frames)
# - Bits 3-7 = 0
# - Concatenation of Link Metric Type ID Flags=0x0b
# - E = 0x00; L = 0x00
# - Type/Average Enum = 1 (Exponential Moving Avg)
# - Metric Enum = 3 (RSSI)
# - Pass Criteria: N/A.
print("Step 10: SSED_2 requests a Forward Series Link Metric ID 10.")
# Step 11: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SSED_2 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 11: Leader responds to SSED_2 with a Link Metrics Management Response.")
_verify_forward_series_mgmt_req_res(pkts, SSED_2, LEADER, SERIES_ID_10, FORWARD_SERIES_FLAGS_MAC_DATA_REQUEST,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_RSSI, 0)
# Step 12: SED_3
# - Description: Harness instructs device to enable IEEE 802.15.4-2015 Enhanced ACK based Probing by sending a Link
# Metrics Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Enhanced ACK Link Metrics Configuration Sub-TLV
# - Type = 7
# - Enh-ACK Flags = 1
# - Concatenation of Link Metrics Type ID Flags=0x0a
# - E = 0x00; L = 0x00
# - Type / Average Enum = 1 (Exponential Moving Avg)
# - Metric Enum = 2 (Link Margin)
# - Pass Criteria: N/A.
print("Step 12: SED_3 enables Enhanced ACK based Probing.")
# Step 13: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SED_3 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 13: Leader responds to SED_3 with a Link Metrics Management Response.")
_verify_enhanced_ack_config_req_res(pkts, SED_3, LEADER, 1, [0x0a])
# Step 14: SSED_3
# - Description: Harness instructs device to enable IEEE 802.15.4-2015 Enhanced ACK based Probing by sending a Link
# Metrics Management Request with the following payload:
# - MLE Link Metrics Management TLV
# - Enhanced ACK Link Metrics Configuration Sub-TLV
# - Type = 7
# - Enh-ACK Flags = 1
# - Concatenation of Link Metrics Type ID Flags=0x09, 0x0b
# - E = 0x00; L = 0x00
# - Type / Average Enum = 1 (Exponential Moving Avg)
# - Metric Enum = 1 (Layer 2 LQI)
# - Metric Enum = 3 (RSSI)
# - Pass Criteria: N/A.
print("Step 14: SSED_3 enables Enhanced ACK based Probing.")
# Step 15: Leader (DUT)
# - Description: Automatically responds with a Link Metrics Management Response.
# - Pass Criteria: The DUT MUST respond to SSED_3 with a Link Metrics Management Response containing the following:
# - MLE Link Metrics Management TLV
# - Link Metrics Status Sub-TLV = 0 (Success).
print("Step 15: Leader responds to SSED_3 with a Link Metrics Management Response.")
_verify_enhanced_ack_config_req_res(pkts, SSED_3, LEADER, 1, [0x09, 0x0b])
# Step 16: SED_1, SSED_2
# - Description: Harness configures devices to send MAC Data Requests periodically.
# - Pass Criteria: N/A.
print("Step 16: Configuration already done in Step 0.")
# Step 17: SED_2, SSED_1
# - Description: Harness instructs devices to send MAC Data packets every 1 second for 30 seconds.
# - Pass Criteria: N/A.
print("Step 17: Devices send data packets.")
# Step 18: SED_1
# - Description: Harness instructs device to retrieve aggregated Forward Series results by sending a MLE Data
# Request message to the Leader (DUT) with the following payload:
# - TLV Request TLV (Link Metrics Report TLV specified)
# - Link Metrics Query TLV
# - Link Metrics Query ID Sub-TLV
# - Query ID = 4 [series configured in step 4]
# - Pass Criteria: N/A.
print("Step 18: SED_1 retrieves aggregated Forward Series ID 4 results.")
# Step 19: Leader (DUT)
# - Description: Automatically responds with a MLE Data Response.
# - Pass Criteria: The DUT MUST reply to SED_1 with a MLE Data Response with the following:
# - Link Metrics Report TLV
# - Link Metrics Report Sub-TLV
# - Metric Type ID Flags
# - E = 0x00
# - L = 0x00
# - Type / Average Enum = 1
# - Metric Enum = 1
# - Value (1 bytes)
print("Step 19: Leader responds to SED_1 with a MLE Data Response.")
_verify_data_req_res_with_report(pkts, SED_1, LEADER, SERIES_ID_4,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_LQI, 0)
# Step 20: SED_2
# - Description: Harness instructs device to retrieve aggregated Forward Series results by sending a MLE Data
# Request message to the Leader (DUT) with the following payload:
# - TLV Request TLV (Link Metrics Report TLV specified)
# - Link Metrics Query TLV
# - Link Metrics Query ID Sub-TLV
# - Query ID = 6 [series configured in step 6]
# - Pass Criteria: N/A.
print("Step 20: SED_2 retrieves aggregated Forward Series ID 6 results.")
# Step 21: Leader (DUT)
# - Description: Automatically responds with a MLE Data Response.
# - Pass Criteria: The DUT MUST reply to SED_2 with a MLE Data Response with the following:
# - Link Metrics Report TLV
# - Link Metrics Report Sub-TLV
# - Metric Type ID Flags
# - E = 0x00
# - L = 0x01
# - Type / Average Enum = 0 (Count)
# - Metric Enum = 0 (Number of PDUs received)
# - Count Value (4 bytes)
print("Step 21: Leader responds to SED_2 with a MLE Data Response.")
_verify_data_req_res_with_report(pkts, SED_2, LEADER, SERIES_ID_6, consts.LINK_METRICS_TYPE_AVERAGE_ENUM_COUNT,
consts.LINK_METRICS_METRIC_TYPE_ENUM_PDU_COUNT, 1)
# Step 22: SED_3
# - Description: Harness makes a Single Probe Link Metric query for Link Margin by instructing the device to send a
# MAC Data message with the Frame Version subfield within the MAC header of the message to set 0b10.
# - Pass Criteria: N/A.
print("Step 22: SED_3 makes a Single Probe Link Metric query.")
# Step 23: Leader (DUT)
# - Description: Automatically responds with an Enhanced Acknowledgement containing link metrics.
# - Pass Criteria: The DUT MUST reply to SED_3 with Enhanced ACK containing the following:
# - Header IE
# - Element ID = 0x00
# - Vendor CID = 0xeab89b (Thread Group)
# - Vendor Specific Information
# - 1st byte = 0 (Enhanced ACK Link Metrics)
# - 2nd byte … Link Margin data
print("Step 23: Leader responds with an Enhanced Acknowledgement.")
_verify_single_probe_req_res(pkts, SED_3, LEADER, 2)
# Step 24: SSED_1
# - Description: Harness instructs device to retrieve aggregated Forward Series Results by sending a MLE Data
# Request message to the Leader (DUT) with the following payload:
# - TLV Request TLV (Link Metrics Report TLV specified)
# - Link Metrics Query TLV
# - Link Metrics Query ID Sub-TLV
# - Query ID = 8 [series configured in step 8]
# - The Link Metrics Query Options Sub-TLV is NOT sent
# - Pass Criteria: N/A.
print("Step 24: SSED_1 retrieves aggregated Forward Series ID 8 results.")
# Step 25: Leader (DUT)
# - Description: Automatically responds with MLE Data Response.
# - Pass Criteria: The DUT MUST unicast MLE Data Response to SSED_1, including the following TLVs:
# - Link Metrics Report TLV
# - Link Metrics Report Sub-TLV
# - Metric Type ID Flags
# - E = 0x00
# - L = 0x00
# - Type / Average Enum = 1
# - Metric Enum = 2
# - Value (1 byte)
print("Step 25: Leader responds to SSED_1 with a MLE Data Response.")
_verify_data_req_res_with_report(pkts, SSED_1, LEADER, SERIES_ID_8,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_LINK_MARGIN, 0)
# Step 26: SSED_2
# - Description: Harness instructs the device to retrieve aggregated Forward Series results by sending a MLE Data
# Request message to the Leader (DUT) with the following payload:
# - TLV Request TLV (Link Metrics Report TLV specified)
# - Link Metrics Query TLV
# - Link Metrics Query ID Sub-TLV
# - Query ID = 10 [series configured in step 10]
# - Pass Criteria: N/A.
print("Step 26: SSED_2 retrieves aggregated Forward Series ID 10 results.")
# Step 27: Leader (DUT)
# - Description: Automatically responds with a MLE Data Response.
# - Pass Criteria: The DUT MUST unicast MLE Data Response to SSED_2, including the following TLVs:
# - Link Metrics Report TLV
# - Link Metrics Report Sub-TLV
# - Metric Type ID Flags
# - E = 0x00
# - L = 0x00
# - Type / Average Enum = 1
# - Metric Enum = 3
# - Value (1 byte)
print("Step 27: Leader responds to SSED_2 with a MLE Data Response.")
_verify_data_req_res_with_report(pkts, SSED_2, LEADER, SERIES_ID_10,
consts.LINK_METRICS_TYPE_AVERAGE_ENUM_EXPONENTIAL,
consts.LINK_METRICS_METRIC_TYPE_ENUM_RSSI, 0)
# Step 28: SSED_3
# - Description: Harness makes a Single Probe Link Metric query for Link Margin by instructing the device to send a
# MAC Data message with the Frame Version subfield within the MAC header of the message to 0b10.
# - Pass Criteria: N/A.
print("Step 28: SSED_3 makes a Single Probe Link Metric query.")
# Step 29: Leader (DUT)
# - Description: Automatically responds with an Enhanced Acknowledgement containing link metrics.
# - Pass Criteria: The DUT MUST reply to SSED_3 with Enhanced ACK containing:
# - Header IE
# - Element ID = 0x00
# - Vendor CID = 0xeab89b (Thread Group)
# - Vendor Specific Information
# - 1st byte = 0 (Enhanced ACK Link Metrics)
# - 2nd byte …LQI
# - 3rd byte … RSSI
print("Step 29: Leader responds with an Enhanced Acknowledgement.")
_verify_single_probe_req_res(pkts, SSED_3, LEADER, 3)
if __name__ == "__main__":
verify_utils.run_main(verify)
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