msc: detect RTP to CN failure in call tests
When CN RTP is missing, the X2 timer will fire after all other call
signalling looks successful. So far we establish an MT call, wait three
seconds and directly disconnect, long before X2 or X2427 can fire.
Make X2 shorter. (By means of f_vty_config() from ttcn, so that we don't
need to edit various osmo-msc.cfg in various repositories. The short
timer is always critical for the test to be accurate.)
Add proper function to detect premature disconnect. Otherwise we just
get a cryptic message like "Couldn't find MnccExpect for incoming call"
because of MNCC messaging after the unexpected release event.
Change-Id: I3ccf541360cc8440e664f0e29494b9ce7b6f8943
2 files changed