See Greg's response below which didn't make it to the list.
See comments inline below.
On 13/05/2025 03:13, Gregory Nutt wrote:
On 5/12/2025 11:54 AM, Tim Hardisty wrote:
I am adding mDNS/DNS-SD query responder software to my project to
allow my NuttX "appliance" to be identified as a ".local" device on
the network.
It is using public domain software here:
https://github.com/mjansson/mdns
Firstly: would this be best done as part of the kernel under the
CONFIG_NET umbrella; or as an app as a NETUTILS feature?
If it uses *only* standard applications interfaces, to the OS then it
is an application and should not be inside the OS. This is for
modularity and security reasons. If it uses both standardized
application interfaces and internal OS interfaces, then it belongs in
libs/. If it uses *only* OS interfaces then it might be part of the OS.
NOTE that OS and applications use a different set of interfaces with
difference calling rules from application space. It is not portable
between the either of the two contexts without some additional
complexity and a fairly deep understanding of the OS interfaces.
Noted: but, all things being equal, would mDNS/DNS-SD be "better" in the
OS or as an App (daemon)?
Secondly: my read of the PD license is that there would be no problem
plundering the necessary code and submitting it as a NuttX feature.
Does anyone disagree - for example is an Apache license of what was
public domain software not a good/nice/allowed thing? I assume it
would be good to include a link to the original work somewhere or other?
The ASF defines some very strict rules for the inclusion of 3rd part
code. Make sure that any thing you want conforms to:
* https://www.apache.org/legal/resolved.html (official version)
* https://www.apache.org/legal/3party.html (previous version)
Thanks for the links. The original code is tagged as being under the
"unlicense.org" rules and has the necessary disclaimers I think Apache
will want.
I may end up just using the PD code as inspiration and write my own
version, in which the "problem" goes away. Otherwise I will submit as a
draft PR and will see what others have to say - the question can be
submitted if needed to the Apache folk. But I'm a way away from being
ready for that anyway!
