[zeromq-dev] ZeroMQ for Contiki OS

Thu Jan 21 07:53:02 CET 2016

Thanks, it worked.

The new repo is https://github.com/zeromq/contiki-zmtp.

For reorganising the sources, it was next in my list ;). Contiki actually
suggest a tree structure to be compatible with their conventions and build
system: https://github.com/contiki-os/contiki/wiki/Out-of-Tree-Development.

I will move most files into apps/zmtp, similarly to the other protocols
they have in their main repo. And the examples in examples/zmtp.

Cheers,
Axel

--
Contact: axel.voitier at gmail.com
Secure: axel.voitier at protonmail.ch

2016-01-20 21:47 GMT+01:00 Pieter Hintjens <ph at imatix.com>:

> Try to create the repo now, it should work.
>
> Indeed, zmq.c/h is probably a bad filename to use and zmtp.c/h is
> better. However I'd probably advise putting the sources into src and
> prefixing them all with something like cz_
>
> On Wed, Jan 20, 2016 at 5:08 PM, Axel Voitier <axel.voitier at gmail.com>
> wrote:
> > Got it.
> >
> > It seems I don't have sufficient rights to create a repo in the
> > organisation.
> > Please, could you either add me the right, or create a repo named
> > "contiki-zmtp"?
> >
> > By the way, there are zmq.c/h files in the current implementation in
> which I
> > have put things built on top of the ZMTP implementation (typically socket
> > related stuff, module initialisation).
> > Should I merge what it contains to zmtp.c/h (for instance), or find
> another
> > name for it?
> >
> >
> > Cheers,
> > Axel
> >
> > --
> > Contact: axel.voitier at gmail.com
> > Secure: axel.voitier at protonmail.ch
> >
> > 2016-01-20 16:47 GMT+01:00 Pieter Hintjens <ph at imatix.com>:
> >>
> >> I've updated the trademark policy since it was slightly out of date.
> >>
> >> http://zeromq.org/docs:trademark-policy
> >>
> >> The goal of this policy is to ensure that users know what they're
> >> getting. In your case I'd use -zmtp in the name, or call it something
> >> else.
> >>
> >>
> >> On Wed, Jan 20, 2016 at 4:20 PM, Axel Voitier <axel.voitier at gmail.com>
> >> wrote:
> >> > Hi Pieter,
> >> >
> >> > Neat! :)
> >> >
> >> > Yes, it would be nice if it spawns interest for other embedded
> targets.
> >> > I am all for the C4.1 policy, and for the move to the zeromq
> >> > organization.
> >> > Thanks for proposing!
> >> >
> >> > Could you enlighten me about what can be named zeromq actually? Is it
> >> > the
> >> > full set of ZMTP+all sockets behaviour, or is it just limited to
> libzmq
> >> > and
> >> > its bindings?
> >> > I guess the name of the project can then be changed to contiki-zmtp
> (or
> >> > contiki-libzmtp?) when moving to the organisation.
> >> >
> >> >
> >> > Cheers,
> >> > Axel
> >> >
> >> > --
> >> > Contact: axel.voitier at gmail.com
> >> > Secure: axel.voitier at protonmail.ch
> >> >
> >> > 2016-01-20 12:47 GMT+01:00 Pieter Hintjens <ph at imatix.com>:
> >> >>
> >> >> Oh, and I sent you your first pull request. :)
> >> >>
> >> >> On Wed, Jan 20, 2016 at 12:39 PM, Pieter Hintjens <ph at imatix.com>
> >> >> wrote:
> >> >> > Hi Axel,
> >> >> >
> >> >> > This is really cool... could be the basis for other embedded
> >> >> > projects.
> >> >> > I'd like to move this into the zeromq organization and use our C4.1
> >> >> > contribution policy, is that OK?
> >> >> >
> >> >> > The name suggests you ported libzmq, which is misleading. It'd be
> >> >> > better to say "ZMTP" instead of "ZeroMQ".
> >> >> >
> >> >> > I've invited you to the ZeroMQ core team so you can move this
> project
> >> >> > (if you approve of this idea).
> >> >> >
> >> >> > -Pieter
> >> >> >
> >> >> >
> >> >> > On Wed, Jan 20, 2016 at 11:47 AM, Axel Voitier
> >> >> > <axel.voitier at gmail.com>
> >> >> > wrote:
> >> >> >> Yes, I actually started from libzmtp. Few things remain from it
> now
> >> >> >> (channels and msgs) as I had to adapt it to whatever Contiki
> >> >> >> provides.
> >> >> >> Contiki does not have a posix socket interface. But the hardest
> was
> >> >> >> t
> >> >> >> adapt
> >> >> >> to its threading model (protothreads) which were really
> >> >> >> constraining...
> >> >> >>
> >> >> >> Also, I adapted the memory allocations to do use as much as
> possible
> >> >> >> preallocation (called memb in Contiki). A few malloc remains here
> >> >> >> and
> >> >> >> there,
> >> >> >> but much less than initially.
> >> >> >>
> >> >> >>
> >> >> >> However, if I was to restart this project, I would not pick
> Contiki
> >> >> >> anymore.
> >> >> >> But rather give it a try with RIOT, which seems to have something
> >> >> >> that
> >> >> >> match
> >> >> >> a POSIX interface. And a much saner threading model that behaves a
> >> >> >> bit
> >> >> >> like
> >> >> >> an event loop with a hub (and reusing features from the underlying
> >> >> >> MCU
> >> >> >> to do
> >> >> >> context switching, like the SVC instruction with ARM).
> >> >> >>
> >> >> >>
> >> >> >> Cheers,
> >> >> >> Axel
> >> >> >>
> >> >> >> --
> >> >> >> Contact: axel.voitier at gmail.com
> >> >> >> Secure: axel.voitier at protonmail.ch
> >> >> >>
> >> >> >> 2016-01-20 9:31 GMT+01:00 Benjamin Henrion <zoobab at gmail.com>:
> >> >> >>>
> >> >> >>> On Wed, Jan 20, 2016 at 4:01 AM, Axel Voitier
> >> >> >>> <axel.voitier at gmail.com>
> >> >> >>> wrote:
> >> >> >>> > Hello,
> >> >> >>> >
> >> >> >>> > I have published an attempt at porting zeromq to Contiki OS:
> >> >> >>> > https://github.com/Alidron/contiki-zeromq
> >> >> >>> >
> >> >> >>> > It has a few limitations still. However, I covered most basics
> of
> >> >> >>> > ZMTP
> >> >> >>> > and a
> >> >> >>> > handful of sockets. It is not entirely compliant with the RFCs
> >> >> >>> > for
> >> >> >>> > the
> >> >> >>> > moment though (some parts prove to be harder to do than I
> >> >> >>> > expected).
> >> >> >>> >
> >> >> >>> > I have been able to run it on a constrained setup: ARM Cortext
> M3
> >> >> >>> > running at
> >> >> >>> > 32MHz, with 512KB of flash (the demo programs weight about
> 130KB)
> >> >> >>> > and
> >> >> >>> > 80KB
> >> >> >>> > of RAM. And with a sub-1GHz RF link.
> >> >> >>> >
> >> >> >>> > The implementation makes use of Contiki network stack, which
> can
> >> >> >>> > use
> >> >> >>> > TCP,
> >> >> >>> > IPv4, IPv6 and 6LoWPAN. I actually tested it over 6LoWPAN on
> the
> >> >> >>> > sub-GHz
> >> >> >>> > link :).
> >> >> >>> >
> >> >> >>> > It is not has featured and fast as running zeromq between two
> >> >> >>> > usual
> >> >> >>> > computers. But I hope this implementation prove it is feasible
> to
> >> >> >>> > have
> >> >> >>> > ZeroMQ on such constrained hardware :).
> >> >> >>>
> >> >> >>> Have you tried to compile libzmtp?
> >> >> >>>
> >> >> >>> One of my short-term goal is to make libzmptp running on esp8266
> >> >> >>> and
> >> >> >>> some cortex m3 board.
> >> >> >>>
> >> >> >>> --
> >> >> >>> Benjamin Henrion <bhenrion at ffii.org>
> >> >> >>> FFII Brussels - +32-484-566109 - +32-2-3500762
> >> >> >>> "In July 2005, after several failed attempts to legalise software
> >> >> >>> patents in Europe, the patent establishment changed its strategy.
> >> >> >>> Instead of explicitly seeking to sanction the patentability of
> >> >> >>> software, they are now seeking to create a central European
> patent
> >> >> >>> court, which would establish and enforce patentability rules in
> >> >> >>> their
> >> >> >>> favor, without any possibility of correction by competing courts
> or
> >> >> >>> democratically elected legislators."
> >> >> >>> _______________________________________________
> >> >> >>> zeromq-dev mailing list
> >> >> >>> zeromq-dev at lists.zeromq.org
> >> >> >>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> _______________________________________________
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> >> >
> >> >
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