paho mqtt C client with TLS

[Vladimir A]

Hello all,

I spent couple hours trying to subscribe to MQTT broker with TLS. And I could not do that.

I got paho.mqtt.c from git repo and build it with make. After that I wrote simple application. Example seems simple: init MQTTClient_SSLOptions structure, specify certificated and key and connect to host. But connection fails.

I try to run test3 from paho.mqtt.c/build/output/test directory, and I see asserts and messages like that "ssl://m2m.eclipse.org is not a valid IP address
Assertion failed, file src/../test/test3.c, line 666, description: Good rc from connect".

Can anybody who worked with paho.mqtt.c and TLS tell me if paho.mqtt.c works with TLS? If yes what should I do to start using it?

[Paul Fremantle]

It could be the broker too. I'd get a command line client working first and then try your code with the same certs. I also find the open ssl rest correct useful. Paul

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Paul Fremantle

Doctoral Researcher, University of Portsmouth, School of Computing

Visiting Scientist, Institute of the Architecture of Application Systems, Stuttgart

Visiting Lecturer, Software Engineering Programme, Oxford University

Co-Founder, WSO2
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email: paul.fr...@port.ac.uk, pa...@fremantle.org

twitter: pzfreo / skype: paulfremantle / blog: http://pzf.fremantle.org

[Vladimir A]

I already have thied console mosquitto_sub client and libmosquitto c client with TLS certificates and key. Both work fine. Now I am trying to work with paho library. Samples from "paho.mqtt.c/build/output/samples" don't use TLS


среда, 30 ноября 2016 г., 17:48:54 UTC+3 пользователь Paul Fremantle написал:

[Paul Fremantle]

Ok... I'm afraid I can't help anymore.... I don't use the C client myself. I've used other clients successfully.

Paul

[Vladimir A]

I recompiled paho library using make (before that I used cmake to build library) and I got it working. Probably build was incomplete or something like that


среда, 30 ноября 2016 г., 21:26:31 UTC+3 пользователь Paul Fremantle написал:

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[Gianluca Mattiroli]

Could you share your modified Makefile ?
Thanks,
Gianluca

[Chetan Gomase]

Hi Vladmir,

Please share your sample application if possible.