gb: Add test cases for NS RESET procedures

Add a test handling proper and mismatching RESETs. The latter may
occur, when ports change within a NS-VC without the SGSN getting
notice.

This tests for the behavior of the NS protocol stack for RESET and
RESET_ACK messages which changing/invalid NSEI and NSVCI like it is
being described in 3GPP TS 08.16, 7.3.1.

Sponsored-by: On-Waves ehf
2 files changed