msc: add vec_keep to lock the AuthVector
Next to AuthVector vec, add boolean vec_keep. When set to true,
as_GSUP_SAI() skips the vector regeneration.
An upcoming patch adds encryption to inter-BSC handover, which will use
vec_keep := true. (See I57e43c60d4389bd301d0195179321a34401bd1dc )
Rationale:
Usually, a random auth vector is generated during as_GSUP_SAI(). For
inter-BSC handover, there are two separate virt-BSC components running.
But to be able to verify that the correct key is passed on from the old
to the new BSS, both titan components need to have the same AuthVector
data. The easiest solution is to generate the AuthVector before
launching the components, and then prevent that it is changed by
as_GSUP_SAI().
Related: SYS#5324
Related: I57e43c60d4389bd301d0195179321a34401bd1dc
Change-Id: I4bca739c2aad8342915e00a218f90fc19be7eafe
2 files changed