ankohuu commented on PR #18738:
URL: https://github.com/apache/nuttx/pull/18738#issuecomment-4251879109
> @ankohuu very nice! Is this multicast behavior of NuttX a BUG or a
limitation? If so, please open an Issue here to map and fix it later
Hi acassis,
Overall, I tend to think the current multicast behavior in NuttX is
**not** correct. MC forwarding should not be driven by the groups that the
local host itself has joined, but, I would not call the current implementation
useless; this is why I described it as behaving more like a **relay**.
Why I limited this change to the current scope:
- I did not spend additional time going through more NuttX networking code,
and I am not yet sufficiently familiar with it to fully validate whether my
understanding of the current behavior is right.
- I lack the historical and design context to infer why the current
implementation exists; it appears intentional rather than accidental.
- My primary goal this time was to sort out the NAT locks, so this issue is
just blocking me.
I can open an issue to put this into the backlog:
- Could you help @ someone familiar with this area to review whether my
understanding of `multicast and the current NuttX behavior` is correct before I
open an issue? We can talk here.
- It would be useful if someone could provide background on the original
design decisions.
- It would also help to clarify the intended direction: whether NuttX
**should** support a more complete multicast model.
Then I am glad to open a bug to track this properly if still necessary
@acassis @xiaoxiang781216 @anchao @masc2008
Shunchao
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