gsmtap design/extensions?

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Guy Harris guy at alum.mit.edu
Fri Apr 12 19:54:47 UTC 2019


On Apr 12, 2019, at 10:15 AM, Johannes Berg <johannes at sipsolutions.net> wrote:

> Agree. Sorry about that. No disrespect was intended, but I'm still not
> sure I understand the need for UDP encapsulation *as part of the
> protocol*. I guess saying "GSMTAP can optionally be encapsulated in UDP
> with the well-known port xyz" would be something else, and it'd make
> more sense to me than saying it has to be.

I see nothing about a struct gsmtap_hdr:

	http://osmocom.org/projects/baseband/wiki/GSMTAP

that

	1) requires that it plus the payload be encapsulated in a UDP datagram

or

	2) would prevent it from being at the beginning of a LINKTYPE_GSMTAP/DLT_GSMTAP packet in a pcap or pcapng file.



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