question about 'lai & lac' paging

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Harald Welte laforge at gnumonks.org
Mon Jan 8 12:25:16 UTC 2018


Hi Stefan,

On Mon, Jan 08, 2018 at 12:43:23PM +0100, Stefan Sperling wrote:
> The code below is probably better but the test seems to use MCC/MNC values
> that don't match the configured network -- perhaps a byte-ordering issue?
> When I run ttcn3 test TC_paging_imsi_nochan_lai I now see:
> osmo_bsc_bssap.c:365 Not paging IMSI 001010000000009: MCC/MNC in Cell Identifier List (0/10) do not match our network (1/1) 

what do the protocol traces say? If you look with wireshark at both BSSMAP and RSL
it should be pretty easy to see if wireshark also thinks there's some wrong encoding.

> I haven't yet looked where ttcn3's MCC/MNC values are set. Any hints?

See "private function f_enc_mcc_mnc(GsmMcc mcc, GsmMnc mnc)" in library/BSSMAP_Templates.ttcn
and its callers. It may very well be buggy.

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