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gotthardp / lorawan-server

Compact server for private LoRaWAN networks
https://gotthardp.github.io/lorawan-server
MIT License
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Trouble with Connector MQTT after upgrading to Mosquitto 2.0.12 (from 2.0.11) #796

Open edulbastos opened 3 years ago

edulbastos commented 3 years ago

Hi,

After upgrading my Debian/Buster mosquitto environment to 2.0.12 (from 2.0.11), my MQTT (mqtt://) connector stopped working.

1631299480: Bad socket read/write on client 12345: Invalid arguments provided.

Anyone with this issue?

Regards,

Eduardo Bastos

edulbastos commented 3 years ago

Hi,

Downgrading to mosquitto 2.0.11 solved my problem, using the SAME mosquitto.conf file.

allow_anonymous false password_file /etc/mosquitto/pwfile listener 1883 XX.XX.XX.XX listener 1883 localhost listener 9001 protocol websockets user mosquitto

It looks like it´s necessary to insert some configuration parameter in the new version of mosquitto to tweak some security issue. Any hints?

Regards,

Eduardo Bastos

spynappels commented 2 years ago

I have the same issue, unfortunately I can not easily downgrade to mosquitto 2.0.11. lorawan-server version is latest release, so I think that is 0.6

I am not sure what changed but I'd very much appreciate it if anyone had any idea on what could be changed, either on the lorawan-server side or the mosquitto side to make this work.

Has anyone been able to work out what the actual problem is, what parameter mosquitto doesn't like?

I've not got any debug logging from Mosquitto, but this is what I do get:

1642167085: New connection from 127.0.0.1:46863 on port 1883.
1642167085: New client connected from 127.0.0.1:46863 as spttest (p1, c1, k0, u'spt-test').
1642167085: Bad socket read/write on client spttest: Invalid arguments provided.

I have also seen the same but with p2 instead of p1. I know using mosquitto_sub I get the following, so could the keepalive parameter (k0) maybe be the problem?

1642166841: New connection from 127.0.0.1:43796 on port 1883.
1642166841: New client connected from 127.0.0.1:43796 as auto-DE45AA79-F23D-DB14-F2A6-ABF0EE559547 (p2, c1, k60, u'spt-test').
HelliWrold1 commented 2 years ago

Hello, is there any tutorial on connecting lora-server to an external MQTT server?

lcse66 commented 2 years ago

Hello, just upgrade to mosquitto >= 2.0.13 and add to mosquitto.conf: max_keepalive 0

From 2.0.12 mosquitto refuses connections when client requests zero (no) keepalive. From 2.0.13 mosquitto accepts these connections only if max_keepalive is set to zero.

2.0.12 - 2021-08-31
===================

Security:
[...]
- Fix `max_keepalive` not applying to MQTT v3.1.1 and v3.1 connections.
  These clients are now rejected if their keepalive value exceeds
  max_keepalive. This option allows CVE-2020-13849, which is for the MQTT
  v3.1.1 protocol itself rather than an implementation, to be addressed.
[...]
2.0.13 - 2021-10-27
===================

Broker:
- Fix `max_keepalive` option not being able to be set to 0.`
[...]

From mosquitto changelog

edulbastos commented 2 years ago

Hi lcse66,

Thanks for the tip of "max_keepalive 0". It worked like a charm.

Regards,

Eduardo Bastos