asn2wry.py - showing protocol version ?

[Martin Mathieson via Wireshark-dev <wireshark-dev () wireshark org>]

Hi,

I would like to be able to show, for the generated dissectors, the version
of the protocol.  For 3GPP protocols, in theory they are
backwards-compatible, but not at this point in the NR(5G) standards.

So for the 3GPP .asn files, the first line might be e.g.
    -- 3GPP TS 38.331 V15.3.0 (2018-09)
I would really like to be able to teach asn2wrs.py to try to find a
suitable such comment and add this text as a generated field inside each
external dissector.

So I am thinking of:
- looking at the first few lines of each .asn file that gets included and
trying to find a suitably formatted version string
- if one is found, in the template file,  add the version protocol item
- for each entry listed under the EXPORTS(?) or  PDU(?) sections, add into
the template file a version field with the chosen string constant.

Does this sound reasonable?
Martin

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