[PATCH 3/3] Add utility to check proper scheduling of SI

[Harald Welte]

Hi Max,

I merged all three of your patches in this series.

On Thu, Mar 17, 2016 at 11:37:24AM +0100, msuraev at sysmocom.de wrote:
> There are several types of System Information messages with tricky
> scheduling rules described in 3GPP TS 05.02 § 6.3.1.3. This GNU Awk
> script takes in .csv file with sequence of scheduled SI messages (for
> example generated using tshark from GSMTAP capture - see usage note
> inside the script) and check the scheduling rules compliance.

I think this is overly complicatd and it requires tshark, relies on
tshark string output stays constant/backwards-compatible/...

I would have preferred if this was a simple C program that parses the
GSMTAP header to detemine frame number and other derived timing
information, simply checks for frames sent on BCCH and then checks the
L3 msg_type to determine whcih SI message is being sent.

Such a small C-language program could/should be compiled alongside with
the other test programs, and wouldn't have any external dependencies or
depend on implementation details of those dependencies not changing over
time.

I understand that one advantage of using a different tool like tshark is
of course that they parse the messages with a different implementation.
But then, we only need to extract very few fields, like
* arfcn
* gsm frame number
* channel type BCCH
* L3 message ID
and there's no real parsing of the SI message content involved.

So next time for similar tasks, please try to avoid constructs like
tshark+gawk, particularly if all that's neded would pe possible to do in
one relatively simple C source file using the osmocom abstraction for
sockets, definition of gsmtap messages, etc.

Regards,
	Harald

-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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