Re: gsmtap design/extensions?

Guy Harris <guy-FrUbXkNCsVf2fBVCVOL8/[email protected]> Fri, 12 Apr 2019 12:54:47 -0700

Newsgroups	org.netbsd.radiotap
Message-ID	<196E881D-AB4A-4569-9C1F-5BCB41FE832F__23045.3446203441$1555103631$gmane$org@alum.mit.edu>

On Apr 12, 2019, at 10:15 AM, Johannes Berg <[email protected]> =
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.