tree 8f5e56ca71b2bc418548b9b0954e9c49fad0a555
parent 752ffd565addbd859b6488558cd867cca35054d2
author Vadim Yanitskiy <axilirator@gmail.com> 1528237764 +0700
committer Vadim Yanitskiy <axilirator@gmail.com> 1528637811 +0700

msc/USSD: add unknown request code testcase

The idea of this testcase is to check reaction of the network on
reception of USSD request with unknown/unhandled request code.

It is not clearly defined by the GSM specs, how the network
should react in such cases, but looking at GSM TS 04.80,
section 4.3.2 "Error types description", the UnexpectedDataValue
error looks suitable. Commercial networks also use this error
when an unknown request code is sent.

Change-Id: I6a3fcaafc37972a38c13722f0b511ea5e1e3fbd8