Re: [gupnp] UPNP compliance to M-SEARCH responses

[Stephen Depooter <stephend xandros com>]

I just created a Merge Request on gitorious for this set of changes as well as 
the previously posted version requirement handling.

http://gitorious.org/gupnp/gssdp/merge_requests/1

I am not sure if these are persistent URLs though...


If requested I will figure out how to get git to send email through the 
company servers to send the patch set directly to the list.  




On Tuesday 15 June 2010 10:34:15 am Stephen Depooter wrote:
> On Monday 14 June 2010 04:47:17 pm Zeeshan Ali (Khattak) wrote:
> > Hi,
> >
> > On Mon, Jun 14, 2010 at 11:21 PM, Stephen Depooter <stephend xandros com>
>
> wrote:
> > > The UPNP device architecture specifies that the M-SEARCH responses MUST
> > > not be sent to malformed M-SEARCH requests.
> > >
> > > Specifically,
> > > "If there is an error with the search request (such as an invalid field
> > > value in the MAN header field, a missing MX header field, or
> > > other malformed content), the device MUST silently discard and ignore
> > > the search request; sending of error responses is
> > > PROHIBITED due to the possibility of packet storms if many devices send
> > > an error response to the same request."
> > >
> > >
> > > Would patches that mandate these requirements be acceptable? or would
> > > that break any DLNA compliance?
> >
> >   No, I seriously doubt so. So please do provide a patch for this.
> >
> >  > My proposal would add a bunch of extra sanity checking and break the
> >  > "liberal
> > >
> > > in what we accept, strict in what we send out" principal, however if
> > > anyone else looks for UPNP certification using gssdp, they will also
> > > need these changes.    In addition, the proposed changes would remove
> > > the gssdp ability to fill in a default value for the MX header if it is
> > > missing.
> >
> >  Although UPnP certification isn't as popular in the market as DLNA,
> > it wouldn't harm to be compliant to both if possible. :)
> >
> > > In addition, since a passed UPNP certification appears to be a
> > > requirement for the first step of DLNA certification, I suspect that
> > > this will be necessary for DLNA as well.
> >
> >   Although your premise is wrong, your conclusion might be very much
> > correct. :)
>
> I got the impression of the requirement from the dlna certification FAQ
> where they talk about having to provide a UPNP certification ID as the
> first steps of the DLNA certification process.
>
> Regardless of the requirement from the DLNA certification process, I will
> come up with a set of patches to tighten up the requirements for M-SEARCH
> request handling for UPNP compliance.



-- 
Stephen Depooter
<stephend xandros com>
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