On Wed, 2019-04-10 at 13:35 +0700, Vadim Yanitskiy wrote: > Hello Johannes, > > FYI, there already was a discussion about GSMTAPv3: > > https://www.youtube.com/watch?v=vum9jzavZi0&list=PL07C78AF831FFE8F9&index=10 > > but unfortunately, nobody has invested time into this (yet?). 2012! But, umm, I don't really have time for a whole video right now - anyone have the slides? :-) But yeah, the first slides look sensible :-) > > 1) Why the design with encapsulating it in UDP? > > This gives us a possibility to "demux" multiple GSMTAP streams on the > receiving side, e.g. if you are running multiple processes. Not sure I get this, but I also don't really care all that much. It's just a pretty strange design if the kernel were to output this, I'm not even sure how I'd do that properly. I don't want to be generating UDP packets there... Perhaps we can define something (GSMTAPv3) to not really care how it's encapsulated, and for 'native' packet captures like what I want on Linux when integrated with the driver, actually use an ARPHDR_GSMTAP, and encapsulate in UDP when you create it in an application and want to send it elsewhere, rather than just writing it to a pcap file? johannes
