Re: [tsvwg] SCTP Socket API modification proposal

[Randy Stewart <randall at lakerest.net>]

I too agree, we can't be changing these structures anymore.. there is
just too many issues with ABI ;-)

I also agree that what these apps actually want is a logging framework  
(as
discussed in the rest of this thread).. and you are right Michael we  
have
such a thing in FreeBSD... which is specific to the O/S.

Its unfortunate we cannot come up with something that would be more
"standard"... It might also be a bit difficult to add things that would
"wake up" and give you event changes. Often times such an interface  
could
slow the system or overload the buffering....

Hmm I wonder if there would be some way to create a "standard trace  
buffer", that
could be pulled with a unified socket API proposal..

And then also add some "tracing" structures. Of course I would think
this would really need to be a separate API document..

Just a thought


R
On Oct 20, 2009, at 4:50 PM, Michael Tüxen wrote:

> On Oct 20, 2009, at 10:12 PM, Vlad Yasevich wrote:
>
> > Florian
> >
> > Adding anything to this option would break the ABI at this point
> > especially considering multiple uses of sctp_paddrinfo.
> >
> > -vlad
> I second that. I do not want to change structures anymore...
> ... and I do not think that adding ssthresh helps much. When
> I'm interested in these values, I'm also interested in any change
> of them. So you need some kind of logging infrastructure.
> FreeBSD, for example, has such a infrastructure, but it is
> system specific. Other OSes might have similar things.
>
> Best regards
> Michael
> > Florian Niederbacher wrote:
> > > Hi,
> > > what thinks the community and the SCTP developers about an  
> > > additional
> > > value in SCTP_GET_PEER_ADDR_INFO ?
> > >
> > > TCP allows to retrieve values about the congestion control with
> > > TCP_INFO. The cwnd value can be retrieved from both(SCTP and TCP),  
> > > but the
> > > ssthresh value in SCTP is missing. I guess it would make sense to  
> > > add
> > > these value and return it with the SCTP_GET_PEER_ADDR_INFO socket  
> > > option.
> > >
> > > Regards
> > > Florian Niederbacher

-----
Randall Stewart
randall at lakerest.net