This commit migrates the functionality covered by test_coap_observe.py
to the Nexus test framework.
- Enabled OPENTHREAD_CONFIG_COAP_OBSERVE_API_ENABLE in Nexus config.
- Created test_coap_observe.cpp to test CoAP observations and
notifications in a simulated network.
- Handled edge cases in the test to avoid segfaults during cancel
response processing.
- Removed the old Python test test_coap_observe.py.
This commit addresses an occasional failure in test 1_2_MATN_TC_10
where the Router's ping reply was not found in Step 8.
- Increased the time advanced in Step 8 from 10 seconds
(kStabilizationTime) to 20 seconds (2 * kStabilizationTime).
- This allows more time for address resolution (NS/NA) and packet
transmission in the simulated environment.
- Verified that the test passes consistently with 100 consecutive
successful runs after applying this fix.
This commit migrates the functionality covered by test_coap_block.py
to the Nexus test framework.
- Enabled OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE in Nexus
config.
- Created test_coap_block.cpp to test CoAP GET and PUT block
transfers in a simulated network.
- Removed the old Python test test_coap_block.py.
This commit introduces support for configuring and retrieving a vendor
OUI-24 (Organizationally Unique Identifier). It defines the new
`OPENTHREAD_CONFIG_NET_DIAG_VENDOR_OUI` configuration option and adds
the `otThreadGetVendorOui()` and `otThreadSetVendorOui()` APIs.
When specified, the vendor OUI is included in the `BorderAgent`
mDNS/DNS-SD TXT data under the `vo` key.
The `VendorInfo` class is updated to manage the OUI value. This
commit also adds the `vendor oui` CLI command to get or set this
property. Finally, it updates the tests to validate the presence and
correctness of the new `vo` key in the TXT data.
This commit removes the `OPENTHREAD_CONFIG_MLE_IP_ADDRS_TO_REGISTER`
configuration option and the logic in `Mle` that limited the number of
IPv6 addresses registered by an MTD with its parent.
By removing this limit, MTDs will now attempt to register all their
valid unicast and multicast addresses. The parent router still
enforces its own limit on the number of addresses it accepts and
stores per child via `OPENTHREAD_CONFIG_MLE_IP_ADDRS_PER_CHILD`.
An error check is added to `openthread-core-config-check.h` to inform
users of the removal of this configuration macro.
This commit moves the constants for the minimum and maximum number of
IPv6 addresses allowed in a Multicast Listener Registration (MLR)
request from the `Ip6AddressesTlv` class to `mlr_types.hpp`.
The new constants are named `kMlrMinIp6Addresses` and
`kMlrMaxIp6Addresses`. This change decouples the protocol-specific
limits from the TLV definition, which is more appropriate as these
limits are specific to the MLR process rather than the TLV itself.
The `Ip6AddressesTlv` class is simplified to a `typedef` of `TlvInfo`.
Call sites in `MlrManager`, `BackboneRouter::Manager`, and `NcpBase`
are updated accordingly.
This commit combines the two separate definitions of the `RouteTlv`
class, which were previously conditionally compiled based on the
`OPENTHREAD_CONFIG_MLE_LONG_ROUTES_ENABLE` configuration, into a
single unified class definition.
The `#if`/`#else` preprocessor directives are now localized within the
specific getter and setter methods (e.g., `GetRouteDataEntryCount()`,
`GetRouteCost()`, `SetRouteData()`) to handle the different routing
data formats. This removes significant code duplication for shared
methods such as `Init()`, `IsValid()`, `GetRouterIdSequence()`, and
`IsSingleton()`.
This commit migrates the test_ping_lla_src.py script from thread-cert
to the Nexus test framework.
The new test_ping_lla_src.cpp implements the same test logic:
- Forms a network with a Leader and two Routers.
- Verifies that pings using a Link-Local Address (LLA) as the source
succeed when sent to a neighbor's Mesh-Local EID (ML-EID).
- Verifies that pings using an LLA source fail when sent to a
non-neighbor's ML-EID, as LLAs are only valid for single-hop
communication.
- Verifies that external routes are not used for LLA-sourced packets.
To support this migration, the Nexus Core class was enhanced with:
- Overloads for SendAndVerifyEchoRequest that allow specifying a
source address.
- New SendAndVerifyNoEchoResponse methods to verify that no echo
response is received (useful for negative test scenarios).
Changes:
- Added tests/nexus/test_ping_lla_src.cpp
- Updated tests/nexus/CMakeLists.txt to include the new test.
- Enhanced tests/nexus/platform/nexus_core.hpp/cpp with new helpers.
- Removed tests/scripts/thread-cert/test_ping_lla_src.py.
Add the jlumbroso/free-disk-space action to all jobs in the Nexus
workflow. This ensures that the runner has sufficient disk space to
complete the build and test tasks, preventing failures due to exhausted
disk resources on GitHub-hosted runners.
Added OPENTHREAD_CONFIG_PARENT_SEARCH_BACKOFF_INTERVAL with a value of
10 minutes (10 * 60 seconds) to the Nexus core configuration. This
helps in controlling the backoff behavior during parent search in the
simulator, making it more interactive.
This commit migrates the 'test_pbbr_aloc.py' script from the
thread-cert framework to the Nexus simulation framework.
The new 'test_pbbr_aloc.cpp' replicates the original test:
- Forms a network with PBBR, Leader, and Router nodes.
- Enables Backbone Router (BBR) on the PBBR node and waits for it
to become the Primary BBR.
- Verifies connectivity to the Leader ALOC (0xfc00) and the PBBR
ALOC (0xfc38) from the Router node using ICMPv6 Echo Requests.
- Confirms that the stack correctly uses Network Data for ALOC
resolution.
Nexus tests provide faster and more scalable network simulations
within a single process, improving CI efficiency and reliability.
Original Python script 'tests/scripts/thread-cert/test_pbbr_aloc.py'
is removed as its functionality is now fully covered by Nexus.
This commit migrates the test for DNSSD names with special characters
from the thread-cert functional tests to the Nexus simulation
framework.
The new Nexus test 'test_dnssd_name_with_special_chars.cpp' replicates
the logic from 'test_dnssd_name_with_special_chars.py' and covers:
- SRP service registration with an instance name containing special
and Unicode characters ("O\T 网关").
- DNS-SD browse to discover the service instance.
- DNS-SD resolution of the service instance name, including
verification of case-insensitive resolution.
* [posix] truncate settings file to last valid offset on parse error
When Init() encounters a corrupt entry, it currently truncates the
entire file to 0 bytes, destroying all settings. Since the parse loop
already knows the exact offset where corruption starts, truncate to
that offset instead, preserving all entries that were successfully
parsed.
This prevents loss of the active operational dataset (and other
settings) when only trailing bytes are corrupt — a common failure
mode when power is lost during a write.
If corruption starts at offset 0 (no valid entries), behavior is
identical to the original code.
* [posix] fsync parent directory after settings file rename
SwapPersist() calls fsync() on the data file descriptor but does not
sync the parent directory after rename(). On journaling filesystems
(ext4, overlayfs), the rename metadata may not reach stable storage
before a power loss. This can leave the old swap file in place,
which triggers a parse error on the next Init().
Add a best-effort fsync() on the parent directory after the rename.
This is non-fatal since the file data is already persisted; only the
directory entry could lag behind.
This commit exposes radio model parameters (path loss constant,
exponent, and sensitivity) and the minimum link request margin from
the Nexus simulator backend to the frontend.
Changes in backend:
- Expose constants in `RadioModel` and `Radio`.
- Add `GetRadioParameters` RPC to `simulation.proto` and implement it
in gRPC and WASM bindings.
- Expose `OPENTHREAD_CONFIG_MLE_LINK_REQUEST_MARGIN_MIN` and
`OPENTHREAD_CONFIG_MLE_PARTITION_MERGE_MARGIN_MIN` via the new RPC.
Changes in config:
- Set `OPENTHREAD_CONFIG_MLE_LINK_REQUEST_MARGIN_MIN` and
`OPENTHREAD_CONFIG_MLE_PARTITION_MERGE_MARGIN_MIN` to 5 dB in
`openthread-core-nexus-config.h`.
This allows the frontend to calculate and render circles dynamically.
This commit introduces the `DoesArrayContain()` template function to
check if a given item is present in a fixed-size C array. The template
arguments are deduced by the compiler, allowing callers to simply use
`DoesArrayContain(aArray, aItem)`.
It also updates `Manager::CoapDtlsSession::ReadSteeringDataTlv()` and
`Ip6::HandleDatagram()` to use this new helper function instead of
using manual `for` loops to iterate over `kEnrollerValidSteeringDataLengths`
and `kForwardIcmpTypes` arrays respectively.
This commit updates the `RouteTlv` implementation to use `ReadBits` and
`WriteBits` from `bit-utils` for reading and writing route data entries
(Link Quality In/Out and Route Cost). This simplifies the bitwise
operations and improves readability.
This commit migrates the DNS-SD test from the thread-cert Python
framework to the Nexus C++ framework.
The new Nexus test 'test_dnssd.cpp' replicates the original test
scenario and functionality:
- Formation of a Thread network with multiple SRP clients and a
server.
- Service registration with subtypes via SRP.
- DNS browsing for full service types and specific subtypes.
- DNS address (AAAA) and service (SRV/TXT/AAAA) resolution.
- Specific DNS record queries for SRV and KEY record types.
- Verification of DNS behavior for non-existent records.
The original Python script 'tests/scripts/thread-cert/test_dnssd.py'
is removed as its functionality is now fully covered by Nexus.
Nexus tests provide faster and more scalable network simulations
within a single process, improving CI efficiency and reliability.
This commit migrates the test_service.py script from thread-cert to the
Nexus test framework.
The new test_service.cpp implements the same test logic:
- Forms a network with a Leader and two Routers.
- Adds and removes services on different nodes.
- Verifies that Service Anycast Locators (ALOCs) are correctly
added to and removed from the nodes' unicast addresses.
- Confirms reachability of the ALOCs using ICMPv6 Echo Requests
from all nodes in the network.
- Ensures ALOCs become unreachable after the service is removed
from the network data.
Changes:
- Added tests/nexus/test_service.cpp
- Updated tests/nexus/CMakeLists.txt to include the new test.
- Removed tests/scripts/thread-cert/test_service.py.
This commit restricts the API to set a preferred router ID under
`OPENTHREAD_CONFIG_REFERENCE_DEVICE_ENABLE`. This feature is intended
for testing and therefore be excluded from standard builds to ensure
compliance with the Thread Specification.
In `Nexus::Core::HandleStateChanged`, the `lastParentId` was not
cleared when a device transitioned to the Router or Leader role. This
could cause stale parent associations to persist, leading to incorrect
link state reporting in the visualizer during subsequent role
transitions (e.g., when a former Leader merges into a partition and
becomes a Child/REED).
This fix clears `lastParentId` (sets it to `0xffff`) when the device
becomes a Router or Leader, ensuring a fresh state for parent
tracking.
This commit migrates 'test_on_mesh_prefix.py' from the thread-cert
functional tests to the Nexus simulation framework.
The new Nexus test 'test_on_mesh_prefix.cpp' covers:
- Propagation of stable and non-stable on-mesh prefixes.
- Different Network Data request behavior for MEDs and SEDs.
- MEDs receiving both stable and non-stable prefixes.
- SEDs receiving only stable prefixes.
- IPv6 address configuration (SLAAC) for all prefixes.
- Reachability verification via ICMPv6 Echo Request/Response.
Migrating to Nexus provides faster execution and improves the
reliability of the functional test suite.
This commit migrates the router multicast link request test from the
thread-cert functional tests to the Nexus simulation framework.
The new Nexus test 'test_router_multicast_link_request.cpp' covers:
- Verification of a REED node becoming a router.
- Multicast Link Request transmission to neighboring routers.
- Quick link establishment with multiple neighbors after role upgrade.
The original Python test 'test_router_multicast_link_request.py' is
removed as its functionality is now fully covered by the Nexus test.
This commit migrates the SRP server anycast mode test from the
thread-cert Python script to the Nexus test framework.
The new Nexus test `test_srp_server_anycast_mode.cpp` covers:
- SRP Server configuration in both Anycast and Unicast modes.
- Proper publication of SRP Server information in Network Data.
- SRP Client auto-start and server selection logic.
- Service registration and verification in both address modes.
- DNS browsing for registered SRP services.
Nexus tests allow for faster and more scalable network simulations
within a single process, improving CI efficiency.
Removed:
- tests/scripts/thread-cert/test_srp_server_anycast_mode.py
Migrate legacy Python test `test_reset.py` to Nexus C++ test
`test_reset.cpp`.
The test verifies that OpenThread correctly recovers network state,
specifically frame counters and datasets, after sequential resets of
nodes in a multi-hop topology (Leader <-> Router <-> ED).
The test sequence:
- Establish multi-hop topology: Leader <-> Router <-> ED.
- Send 1010 pings from ED to Leader to advance the frame counter
beyond the default storage threshold (1000).
- Reset Leader, Router, and ED sequentially.
- Verify end-to-end connectivity after resets, confirming that frame
counters were correctly recovered from non-volatile storage.
Legacy `tests/scripts/thread-cert/test_reset.py` is removed as its
functionality is now fully covered by the Nexus test.
This commit migrates the following tests from thread-cert to Nexus:
- test_router_reboot_multiple_link_request.py
- test_leader_reboot_multiple_link_request.py
New Nexus tests cover:
- Router rebooting and sending multiple Link Requests when isolated.
- Leader rebooting and sending multiple Link Requests when isolated.
The original Python cert tests are removed as they are now fully
covered by the Nexus framework.
This commit adds a new Nexus test to verify the functionality of the
MLE long routes experimental feature, which allows path costs to
exceed the standard limit of 15.
The new test `TestLongRoutes` in `test_long_routes.cpp` forms a
topology consisting of a leader and a chain of 25 routers. It then
validates that the path cost from the last router in the chain to the
leader is correctly reported as 25 using `GetPathCostToLeader()`.
Supporting changes include:
- Updating `build.sh` to support a `long_routes` build target that
enables `OT_MLE_LONG_ROUTES`.
- Adding the `long_routes` test to `CMakeLists.txt` with the
appropriate labels.
- Introducing a new GitHub workflow job `nexus-long-routes-tests` in
`nexus.yml` to automate the execution of this test.
This commit migrates the router reattach test from the thread-cert
Python framework to the Nexus C++ framework.
The new Nexus test 'test_router_reattach.cpp' replicates the
original test scenario:
- A full 32-node router network is formed.
- Router upgrade/downgrade thresholds are set to 32.
- A router is reset and verified to re-attach and reclaim its
router role.
- The test ensures the router does not downgrade after the router
selection jitter interval.
The original Python script 'tests/scripts/thread-cert/
test_router_reattach.py' is removed as its functionality is now
fully covered by Nexus.
Nexus tests provide faster and more scalable network simulations
within a single process, improving CI efficiency.
This commit migrates the anycast routing test from the thread-cert
functional tests to the Nexus simulation framework.
The new Nexus test 'test_anycast.cpp' replicates the linear topology
(R1-R2-R3-R4-R5) and verifies:
- Anycast routing for DHCPv6 Agent (ds/cs) ALOCs.
- Dynamic routing updates when multiple anycast servers are present.
- Traffic routing to the nearest anycast destination.
The original Python test 'test_anycast.py' is removed as its
functionality is now fully covered by the Nexus test.
This commit migrates the anycast locator test from the thread-cert
functional tests to the Nexus simulation framework.
The new Nexus test 'test_anycast_locator.cpp' covers:
- Anycast Locator (ALOC) resolution for the Leader from all nodes.
- Custom service ALOC resolution when only one node provides it.
- Closest-node ALOC resolution when multiple nodes provide the same
service in a line topology (LEADER-R1-R2-R3-R4).
- Verification that nodes resolve to the nearest service instance.
The original Python test 'test_anycast_locator.py' is removed as its
functionality is now fully covered by the Nexus test.
This commit simplifies the `Ip6AddressesTlv` by removing the dedicated
class definition and instead defining it as a `TlvInfo` for the
`ThreadTlv::kIp6Addresses` type.
The usage of `Ip6AddressesTlv` is updated in `BbrManager`,
`MlrManager`, and related tests to use `Tlv::StartTlv()` and
`Tlv::EndTlv()` when appending the TLV to messages.
This commit renames `GetRouteDataLength()` and `SetRouteDataLength()`
to `GetRouteDataEntryCount()` and `SetRouteDataEntryCount()` in the
`RouteTlv` class.
When `OPENTHREAD_CONFIG_MLE_LONG_ROUTES_ENABLE` is enabled, the
route data entries use a packed format (12 bits or 1.5 bytes per
entry). Consequently, the byte length of the route data field in
the TLV is no longer equal to the number of route entries.
This change ensures that `GetRouteDataEntryCount()` correctly
calculates the number of entries from the TLV length and
`SetRouteDataEntryCount()` sets the TLV length correctly based on
the entry count.
This commit migrates the SRP TTL test from the thread-cert Python
framework to the Nexus C++ framework.
The new Nexus test `test_srp_ttl.cpp` covers all four TTL clamping
cases originally implemented in `test_srp_ttl.py`:
1. CLIENT_TTL < TTL_MIN < LEASE_MAX => Clamped to TTL_MIN.
2. TTL_MIN < CLIENT_TTL < TTL_MAX < LEASE_MAX => Used CLIENT_TTL.
3. TTL_MAX < LEASE_MAX < CLIENT_TTL => Clamped to TTL_MAX.
4. LEASE_MAX < TTL_MAX < CLIENT_TTL => Clamped to LEASE_MAX.
Nexus tests provide faster and more scalable network simulations
within a single process, improving CI efficiency.
The original Python script `tests/scripts/thread-cert/test_srp_ttl.py`
is removed as its functionality is now fully covered by Nexus.
The test was failing occasionally due to the unpredictable timing of
tick-aligned timers and dataset propagation in simulations.
Specifically:
1) The router's jittered timeout (minimum 1 second) could expire
in as little as 1ms if an MLE TimeTick occurred immediately
after the security policy update.
2) Dataset propagation via MLE Advertisements could take up to
32 seconds, making immediate checks on the router's role
unreliable.
This commit fixes the flakiness by:
- Replacing flaky router role checks with `IsRouterRoleAllowed()`
assertions. This verifies that the security policy has been
successfully propagated and applied, regardless of whether the
actual role transition has completed.
- Increasing the propagation wait time to 5 seconds. This provides
a safe margin for simulated radio propagation while remaining
well within the leader's 10-second downgrade delay.
- Ensuring both the leader and router are verified for policy
application in both phases of the test.
- Maintaining the final checks to ensure both nodes eventually
become detached after the full downgrade delay (150 seconds).
The fix was verified with 1000 consecutive successful iterations.
This commit migrates the SRP server reboot port test from the
thread-cert functional tests to the Nexus simulation framework.
The new Nexus test 'test_srp_server_reboot_port.cpp' covers:
- SRP server address mode configuration (Unicast).
- SRP client auto-start discovery of the server.
- SRP server reboot (disable/enable) without node reboot.
- Verification that the server selects a new port after each reboot.
- Robustness of service re-registration over 25 reboot iterations.
The original Python test 'test_srp_server_reboot_port.py' is removed
as its functionality is now fully covered by the Nexus test.
This commit migrates the SRP register services with different
lease test from the thread-cert Python framework to the Nexus
test framework.
The new Nexus test (test_srp_register_services_diff_lease.cpp)
reproduces the functionality of the original Python test:
- Registration of multiple services with different lease/key-lease
intervals.
- Verification of per-service lease values on the SRP server.
- Ensuring key-lease is always at least as long as the lease.
- Validating lease renewal and expiry behaviors.
- Testing dynamic changes to default client lease and TTL.
Migrating to Nexus allows for faster and more scalable network
simulations within a single process.
This commit migrates the srp_client_save_server_info test from the
thread-cert Python-based test framework to the Nexus C++ simulation
framework.
The new Nexus test (test_srp_client_save_server_info.cpp) verifies:
- SRP client selects an SRP server when auto-start is enabled.
- SRP client sticks to the current server even if other SRP servers
become available.
- SRP client saves and reuses the selected server info across SRP
client stops and restarts.
- SRP client selects a new server if the current one becomes
unavailable.
- SRP client sticks to the new server even if the old one returns.
The original Python test script is removed as its functionality is
now fully covered by the new Nexus test.
This commit migrates the test_srp_register_500_services.py test from
the thread-cert test suite to the Nexus platform.
The new C++ test (tests/nexus/test_srp_scale.cpp) implements the same
functionality: it verifies that 25 SRP clients (13 routers and 12
FEDs) can successfully register a total of 500 services (20 services
per client) with a single SRP server (the leader).
The commit includes:
- Removal of the original Python test file.
- Addition of the new Nexus C++ test file.
- Integration of the new test into CMakeLists.txt and
run_nexus_tests.sh.
This commit migrates the SRP client host removal test from the
thread-cert Python-based framework to the Nexus framework.
The new C++ implementation in tests/nexus/test_srp_client_remove_host.cpp
covers the same scenarios as the original Python script:
- Successful registration of SRP host and services.
- Verification that ClearHostAndServices() does not immediately remove
server-side state.
- Verification that RemoveHostAndServices(removeKey=False,
sendUnregToServer=True) marks the host and services as deleted on the
SRP server.
- Verification that RemoveHostAndServices(removeKey=True,
sendUnregToServer=True) fully removes the host and service entries
from the SRP server.
The original Python script test_srp_client_remove_host.py is removed
as its functionality is now fully covered by the Nexus test.
This commit migrates the test_srp_many_services_mtu_check.py from
tests/scripts/thread-cert to the Nexus test framework.
The new test, tests/nexus/test_srp_many_services_mtu_check.cpp,
verifies that the SRP client correctly handles and splits SRP Update
messages when registering a large number of services that exceed
the IPv6 MTU size (1280 bytes).
Changes:
- Added tests/nexus/test_srp_many_services_mtu_check.cpp.
- Updated tests/nexus/CMakeLists.txt to include the new test.
- Removed tests/scripts/thread-cert/test_srp_many_services_mtu_check.py.
This commit stabilizes the Nexus reed_address_solicit_rejected test by
increasing the wait time for network data synchronization from 5 seconds
to 15 seconds.
The test was occasionally failing because the 5-second wait was
sometimes insufficient for the REED's service registration to reach the
leader and for the updated network data to be broadcast back to the
REED. Increasing the delay to 15 seconds provides more robust buffer for
these network events.
Verified by running the test 50 times in a loop without failures.
This commit migrates the `test_mle_msg_key_seq_jump.py` cert test to the
Nexus simulation framework.
The new Nexus test `test_mle_msg_key_seq_jump.cpp` verifies that nodes
can correctly handle jumps in the MLE key sequence and stay attached to
the network. It covers scenarios like child triggering key sequence
updates via Child Update Request and routers propagating key sequence
updates.
The original Python test script is removed as its functionality is now
fully covered by the new Nexus test.
This commit migrates the 'test_srp_client_change_lease.py' cert test
to the Nexus simulation framework.
The new Nexus test ('test_srp_client_change_lease.cpp') verifies:
- SRP registration with default lease and TTL.
- Updating the lease interval and ensuring it is reflected in SRP
Update messages.
- Updating the TTL and ensuring it is reflected in SRP Update
messages.
- Setting the TTL to 0 and ensuring the lease interval is used as
the TTL in SRP Update messages.
The original Python test script is removed as its functionality is
now fully covered by the new Nexus test.
This commit stabilizes the Nexus SRP auto-start test by increasing
the synchronization wait time from 20 seconds to 30 seconds.
The test was occasionally failing in the Nexus environment because
the 20-second wait was sometimes insufficient for the SRP server
registration to fully propagate through the network data and for
the SRP client to process the update and complete its server
selection. Increasing the wait time to 30 seconds provides a more
robust buffer for these network synchronization events.
Verified by running the test 100 times in a loop without failures.
This commit migrates the `test_ipv6_fragmentation.py` cert test to the
Nexus simulation framework.
To support this migration, the Nexus core configuration was updated to
enable IPv6 fragmentation (`OPENTHREAD_CONFIG_IP6_FRAGMENTATION_ENABLE`).
The new Nexus test `test_ipv6_fragmentation.cpp` covers the validation
of IPv6 fragmentation and reassembly. It sends large ICMPv6 Echo
Requests exceeding the 1280-byte MTU between a Leader and a Router:
- 1952 bytes payload from Leader to Router
- 1831 bytes payload from Router to Leader
The original Python test script is removed as its functionality is now
fully covered by the new Nexus test.
This commit updates the `RouterIdSet` class, renaming it to
`RouterIdMask` and expanding it to encapsulate both the router ID
sequence number and the bitmask. This allows simplifying the
definition of `ThreadRouterMaskTlv` and `RouteTlv`.
This commit simplifies the `TimeParameterTlv` implementation by
defining a `TimeParameterTlvValue` and using the `SimpleTlvInfo`
template to define `TimeParameterTlv`.
Jonathan Hui