aellwein / lwm2mclient Goto Github PK

The correct way to implement signed ints according to the new specification is to use two's complement.

Implement Write operation on Object/Instance/Resource

I am trying to run your client.py code on macOS, by connecting to the Leshan demo server, and get the following error:

2020-06-09 16:27:01,726 [DEBUG] Using selector: KqueueSelector
2020-06-09 16:27:01,731 [ERROR] Task exception was never retrieved
future: <Task finished coro=<Client.run() done, defined at client.py:151> exception=ValueError('The transport can not be bound to any-address.')>
Traceback (most recent call last):
File "client.py", line 153, in run
self.context = await Context.create_server_context(self, bind=('::', 0))
File "/usr/local/lib/python3.7/site-packages/aiocoap-0.4a1-py3.7.egg/aiocoap/protocol.py", line 576, in create_server_context
self.transport_endpoints.append((yield from TransportEndpointSimpleServer.create_server(bind, new_message_callback=self._dispatch_message, new_error_callback=self._dispatch_error, log=self.log, loop=loop)))
File "/usr/local/lib/python3.7/site-packages/aiocoap-0.4a1-py3.7.egg/aiocoap/transports/simplesocketserver.py", line 117, in create_server
self._pool = yield from _DatagramServerSocketSimple.create(server_address, log, self._loop, self._received_datagram, self._received_exception)
File "/usr/local/lib/python3.7/site-packages/aiocoap-0.4a1-py3.7.egg/aiocoap/transports/simplesocketserver.py", line 60, in create
raise ValueError("The transport can not be bound to any-address.")
ValueError: The transport can not be bound to any-address.

I did find the aiocoap issue chrysn/aiocoap#101.

But, when trying by setting an explicit IP address (IPv4, as I am not assigned an IPv6 address), I get the following error:

ValueError: Passing reuse_address=True is no longer supported, as the usage of SO_REUSEPORT in UDP poses a significant security concern.

• Implement tests
• Write docs
  ...

I am running the client on a Windows machine. The client registers to a Leshan server. After that, I try to read a value (6/0/0 - Latitue ) from Leshan, I get the follwoing error alert in Leshan:

Unable to read resource /6/0/0 for python-client : 500 Invalid Response:Unable to decode response payload of request [ReadRequest [path=/6/0/0 format=ContentFormat [name=TLV, code=11542]]] from client [python-client]

In the client I see the following log:

2020-06-24 15:00:55,246 [DEBUG] read on 6/0/0
Received read
2020-06-24 15:00:55,247 [DEBUG] encode_resource(): 00000000: 32 37 2E 39 38 36 30 36 35 27.986065
2020-06-24 15:00:55,247 [DEBUG] Sending message <aiocoap.Message at 0x40963b8: Type.ACK 2.05 Content (MID 12371, token f4ca15c20d4affe1) remote <_Connection at 0x4090c28 on transport <_ProactorDatagramTransport fd=788 read=<_OverlappedFuture pending overlapped=<pending, 0x4075d38> cb=[_ProactorDatagramTransport._loop_reading()]>>, active>, 9 byte(s) payload>

After this issue with aiocoap has been fixed.

Hi,
Is there available any update of code?
Currently I have tried to run your code of client and after modification of Cleient connection as below:

[...]
if __name__ == '__main__':
    client = Client(server="leshan.eclipseprojects.io",server_port=5683)
[...]

Client is registering into LwM2M Leshan Server but any READ request from Leshan GUI give me following error:

/app# python3 client.py
2019-05-16 20:42:43,561 [DEBUG] Using selector: EpollSelector
2019-05-16 20:42:43,588 [DEBUG] Sending message <aiocoap.Message at 0x7fbebf635ac8: Type.CON POST (ID 38485, token b'\x00\x00\xe2L') remote <UDP6EndpointAddress [::ffff:23.97.187.154]:5683>, 4 option(s), 27 byte(s) payload>
2019-05-16 20:42:43,589 [DEBUG] Exchange added, message ID: 38485.
2019-05-16 20:42:43,591 [DEBUG] Timeout is 93.0
2019-05-16 20:42:43,592 [DEBUG] Sending request - Token: 0000e24c, Remote: <UDP6EndpointAddress [::ffff:23.97.187.154]:5683>
2019-05-16 20:42:43,607 [DEBUG] Incoming message <aiocoap.Message at 0x7fbebf387470: Type.ACK 2.01 Created (ID 38485, token b'\x00\x00\xe2L') remote <UDP6EndpointAddress [::ffff:23.97.187.154]:5683 with local address>, 1 option(s)>
2019-05-16 20:42:43,608 [DEBUG] New unique message received
2019-05-16 20:42:43,609 [DEBUG] Exchange removed, message ID: 38485.
2019-05-16 20:42:43,611 [DEBUG] Received Response: <aiocoap.Message at 0x7fbebf387470: Type.ACK 2.01 Created (ID 38485, token b'\x00\x00\xe2L') remote <UDP6EndpointAddress [::ffff:23.97.187.154]:5683 with local address>, 1 option(s)>
Result: 2.01 Created
('rd', 'OHsZuDkjW9')
2019-05-16 20:42:43,613 [INFO] client registered at location OHsZuDkjW9
2019-05-16 20:43:00,578 [DEBUG] Incoming message <aiocoap.Message at 0x7fbebf392860: Type.CON GET (ID 54886, token b'\xfa\xb3\xd7\xd9\xb8k.\xc4') remote <UDP6EndpointAddress [::ffff:23.97.187.154]:5683 with local address>, 2 option(s)>
2019-05-16 20:43:00,579 [DEBUG] New unique message received
2019-05-16 20:43:00,579 [DEBUG] New responder created, key (('1', '0'), <UDP6EndpointAddress [::ffff:23.97.187.154]:5683 with local address>)
2019-05-16 20:43:00,580 [DEBUG] read on
2019-05-16 20:43:00,580 [INFO] Sending error response: b''
2019-05-16 20:43:00,580 [DEBUG] Preparing response...
2019-05-16 20:43:00,580 [DEBUG] Sending token: fab3d7d9b86b2ec4
2019-05-16 20:43:00,580 [DEBUG] Sending response, type = Type.ACK (request type = Type.CON)
2019-05-16 20:43:00,581 [DEBUG] Sending message <aiocoap.Message at 0x7fbebf3b60f0: Type.ACK 5.00 Internal Server Error (ID 54886, token b'\xfa\xb3\xd7\xd9\xb8k.\xc4') remote <UDP6EndpointAddress [::ffff:23.97.187.154]:5683 with local address>>
2019-05-16 20:43:00,581 [ERROR] An exception occurred while rendering a resource: AttributeError('invalid path length: 0.')
2019-05-16 20:43:00,581 [ERROR] invalid path length: 0.
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/aiocoap/protocol.py", line 990, in dispatch_request
    response = yield from self.protocol.serversite.render(request)
  File "/usr/local/lib/python3.7/asyncio/coroutines.py", line 123, in coro
    res = yield from res
  File "/usr/local/lib/python3.7/asyncio/coroutines.py", line 123, in coro
    res = yield from res
  File "/usr/local/lib/python3.7/asyncio/coroutines.py", line 120, in coro
    res = func(*args, **kw)
  File "client.py", line 82, in render_get
    return self.handle_read(request.opt.uri_path)
  File "client.py", line 25, in handle_read
    return self.encoder.encode(path)
  File "/app/lwm2mclient/encdec.py", line 355, in encode
    if not self.model.is_path_valid(path):
  File "/app/lwm2mclient/model.py", line 73, in is_path_valid
    raise AttributeError("invalid path length: %d." % len(path))
AttributeError: invalid path length: 0.

data.json could be validated on startup by checking it with definitions provided by lwm2m-object-definitions.json.

I would like to connect to a remote lwm2m server. Is this feasible with this repository?

Provide a Dockerfile to be able to deploy in a Docker container.
Before doing so, IMHO the configuration must be settable over the cmdline/env variables.

Provide a REST API for client instrumentation.
Possible operations could be:

• start/register new client instance (with given endpoint ID, lifetime, etc)
• deregister existing client instance
• notify on some object/instance/resource
• change something in data model
  etc.