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During Set Ciphering Mode on GERAN, it is required to know whether UMTS AKA is
used to decide which Kc to pick. Change static function is_umts_auth() into
public vlr_use_umts_aka(), so future patches can re-use it.
Prepares: If04e405426c55a81341747a9b450a69188525d5c
Change-Id: I85d784c62ecbabdb6186a3dae4dcd554e7921041
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Fixes: coverity CID#178663
Change-Id: I7d1c15b546377b1afa38f7f40c5421b743e21605
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The name auth_tuple_max_use_count suggests that if I want to use each auth
tuple exactly once, I need to set it to 1. Curiously, so far you need to set
to intended uses - 1.
Reflect this in its name by renaming to auth_tuple_max_reuse_count.
I first considered to not rename but change the if-conditions so that == 1
means each tuple is used once, and upon struct vlr allocation, set the default
to 1. That would also logically entail that setting to 0 means to re-use
vectors infinitely often, like now a value < 0 does. That means, when
allocating a vlr struct zeroed out, we would by default have the most
dangerous/unsafe configuration. It's no problem to set a default to 1 upon
allocation, but by renaming the variable instead, we get safer alloc-zero
behavior and don't need to change any conditionals in the code (even though the
patch ends up considerably larger from all the renaming).
Change-Id: I0b036cae1536d5d6fb2304f837ed1a6c3713be55
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Change-Id: I1f96a1285bbd1b4607614856bca935d5c26e2da9
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Original libvlr code is by Harald Welte <laforge@gnumonks.org>,
polished and tweaked by Neels Hofmeyr <nhofmeyr@sysmocom.de>.
This is a long series of trial-and-error development collapsed in one patch.
This may be split in smaller commits if reviewers prefer that. If we can keep
it as one, we have saved ourselves the additional separation work.
Related: OS#1592
Change-Id: Ie303c98f8c18e40c87c1b68474b35de332033622
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