Re: [gupnp] [PATCH] Respond to M-SEARCH requests for urns specifying an eligible version

["Zeeshan Ali (Khattak)" <zeenix gmail com>]

Hi,

On Thu, Jun 17, 2010 at 11:08 PM, Stephen Depooter <stephend xandros com> wrote:
> The last paragraph of 1.3.2 talks about when to reply. section 1.3.3 only
> talks about the content of a reply when you actually do reply to the search
> request.
>
> The last paragraph of 1.3.2 says:

   OK, I read each part and checked if our existing GSSDP code does
what is expected. Here goes:

> "Updated versions of device and service types are REQUIRED to be fully
> backward compatible with previous versions. Devices MUST respond to M-SEARCH
> requests for any supported version. For example, if a device
> implements “urn:schemas-upnp-org:service:xyz:2”, it MUST respond to search
> requests for both that type and “urn:schemas-upnp-org:service:xyz:1”.

  Check (for both of these MUSTs)!  We make use of regular expression
to do a version-independent check on incoming M-SEARCH requests.

> The
> response MUST specify the same version as was contained in the search
> request.

  Check! Read libgssdp/gssdp-resource-group.c:802

> If a control point searches for a device or service of a particular
> version and receives no responses (presumably because no device present on
> the network supports the specified version), but is willing to operate using
> a lower version, it MAY repeat the search request specifying the lower
> version."

  With our devices it doesn't come to that since we respond to request
with ANY version.

-- 
Regards,

Zeeshan Ali (Khattak)
FSF member#5124
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