[riot-users] gcoap and DTLS

Koen Zandberg koen at bergzand.net
Mon Apr 16 09:52:36 CEST 2018

Hi Cristina,

To expand a bit on Thomas suggestion, I have good experience with
Tayga[1] at a gateway and using this to provide connectivity to the IPv4
part of the internet from IPv6 only hosts. For guides on setting this up
I would suggest looking for generic guides on NAT64 for IPv6 only
networks, similar to the setup described in rfc6586[2]. While the
situation there is more aimed at regular wired networks, from a network
perspective, it seems similar to your requirements.


[1]: http://www.litech.org/tayga/
[2]: https://tools.ietf.org/html/rfc6586

On 04/16/18 09:43, Thomas C. Schmidt wrote:
> Hi Cristina,
> I cannot help with the IPv4 code fragments, but I wonder why you want
> to use IPv4 on RIOT?
> To gain 'transparent' IPv4 connectivity, you can use IPv6-embedded
> IPv4 addresses and perform stateless address translation at a gateway.
> Would that help?
> Best,
>  Thomas
> On 16/04/2018 09:38, Cristina Paniagua wrote:
>> Hi,
>> Until the date, I've been working with IPv6,gcoap and Mulle devices,
>> but I would like to know if I could send from the device a GET to an
>> IPv4 address.  I read that it's not supported by RIOT, but I found
>> some library IPv4, I tried to use and it's not working.
>> someone knows more about the use of IPv4 in RIOT?
>> Thank you all, Cristina.
>> ------------------------------------------------------------------------
>> *De:* users <users-bounces at riot-os.org> en nombre de Ken Bannister
>> <kb2ma at runbox.com>
>> *Enviado:* martes, 30 de enero de 2018 16:18:41
>> *Para:* users at riot-os.org
>> *Asunto:* Re: [riot-users] gcoap and DTLS
>> Thanks, Joakim. I have created a similar example, although it's not
>> in the repository examples collection. For anyone interested, check
>> out the, "gcoap presentation" thread on the ML from last October [1].
>> It references the data collection application as well as a
>> presentation and video I created about it.
>> Ken
>> [1] https://lists.riot-os.org/pipermail/users/2017-October/thread.html
>> On 01/30/2018 02:52 PM, Joakim Nohlgård wrote:
>>> I think an example with an observable, periodic resource would be a
>>> useful addition to the example collection. The periodic resource
>>> could be simply sending the xtimer_now value or adc_read or similar
>>> periodically every 5 seconds or something to show how to set up
>>> periodic notifications in gcoap.
>>> Without looking at the code I guess it would be driven by xtimer to
>>> provide events to the gcoap observable resource event loop.
>>> Best regards, Joakim
>>> On Jan 30, 2018 3:21 PM, "Ken Bannister" <kb2ma at runbox.com
>>> <mailto:kb2ma at runbox.com>> wrote:
>>>     Hi all,
>>>     Recently I received private mail with some specific questions
>>>     about gcoap and DTLS. Responses below.
>>>     There is a work-in-progress pull request for integration of DTLS
>>>     and gcoap, #7177. There is good discussion in there about the best
>>>     way to integrate DTLS generically with RIOT's sock networking.
>>>     RIOT's master branch includes support for the Observe extension
>>>     for non-confirmable messaging. There is an open PR for integration
>>>     with confirmable messaging, #7548.
>>>     There also was a question about "periodic resources", but that's
>>>     not part of the CoAP spec AFAIK. Certainly one could integrate a
>>>     timer to periodically send Observe notifications.
>>>     Ken
>>>     _______________________________________________
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