[Opensim-dev] [libsl-dev] how does libopenmv handle different versions of the same packets?

[Michael Wright]

hmm strange.

We had the problem when using the current _packet_.cs (on friday) from libomv. I replaced the old _packet_.cs in our libsl version (changing the Maths types back to the LL ones). With the lines to read/convert the SurfaceInfoBlocks commented out, this works fine. But with those lines in there, it throws MalformedDataException from the SurfaceInfoBlock.FromBytes(). So one confirmed it didn't do this when using the 1.21 preview viewer.

So not sure what the difference is. 

John Hurliman <jhurliman at jhurliman.org> wrote: I'm not able to reproduce this with the trunk of libomv, I believe it was fixed a long time ago. With a 1.20 release candidate viewer I will correctly get an ObjectGrabPacket object with a SurfaceInfoBlock array of zero length. If I connect with a 1.21 client I get a SurfaceInfoBlock array with length one and all of the fields filled in. Sounds like the solution is for libomv to get the 0.6.0 release pushed out (alongside the 1.0.0 release of OpenMetaverseTypes), and me to finish the upgrade patch for OpenSim.
 
John


On Fri, Aug 29, 2008 at 8:13 AM, Sean Dague <sdague at gmail.com> wrote:
 There was an attempt to upgrade packets.cs in OpenSim yesterday by MW to
 pull in the new surface vectors in the ObjectGrab* packets, which will
 let us detect the touch points for 1.21 (unreleased) clients.
 
 The issue is that pre 1.21 clients don't send those extra fields, and
 that the packet parser was blowing up violently.  How is libopenmv
 supposed to be handling this case?  For using in opensim we definitely
 need to be able to support both pre 1.21 and post 1.21 clients at the
 same time, just with zeroed out values in the < 1.21 case.
 
 Thanks in advance,
 
         -Sean
 
 --
 Sean Dague / Neas Bade
 sdague at gmail.com
 http://dague.net
 
 
 
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