Re: [lwip-devel] brain storming about "socket2"

[Jonathan Larmour]

Micael (abc) wrote:
[snip]
> This is the reason for me to nowadays always go with sockets.

That's not unreasonable.

> To be fair, I have not looked into netconn API because of this. But
> looking at the wiki, it seams there's no select() support for
> instance? How would you be waiting for many simultaneous connections?
> Because of differences like this, it does not *seam* to be a easy
> replacement for the socket API, at least not in a more complicated
> environment.

That's an area where the API style is a bit different I guess. You create 
the socket with a callback function using 
netconn_new_with_proto_and_callback(). You can then use the callback to 
handle waking stuff up to process new data etc.

> * Coming back to why I am concerned about sockets in lwip: I fully
> realize that an open source project is what everyone contributes to
> it, but I get the feeling that most of you active developers are not
> using the socket API,

That's not true. That's not even true of me - I have existing code around. 
As Simon says, the socket API is working and supported. You only have to 
look at the effort spent on improving it in the 1.3.0 release to see that.

> and too me, it is not clear where you guys as a
> community wants to take lwip/sockets. I also see piero struggling with
> different issues that from where I stand, looks like real flaws.

I don't think Piero has been reporting flaws? Rather, wanting 
enhancements. lwIP is lightweight, and being lightweight has not always 
had every feature. So yes, not every socket operation can be used 
non-blocking yet. But as you've maybe seen from the "Success stories" 
thread, and the number of people on this list, that's not a big problem 
for most people. (Although that support probably will be added in the 
not-too-distant future probably).

Jifl
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