Changes

asp: Configure block and shutdown adm state independently

The block/no block and shutdown/no shutdown commands tweak independent
states; adapt the code to what's presented to the user. This simplifies
handling of both states, since the user may want eg. have it blocked and
shutdown, and then "no shutdown" it but make sure it stays blocked so no
race condition happens.

Related: OS#6752
Change-Id: I3ab81a4f6f6b72015c5068d5a27128642622cf99

xua: Split traffic mode readonly validation from internal state update

First validate the whole message, then once evyerthing is fine, act on
the message updating internal state.

Change-Id: I05ba891e774ebe341229b968c92e0383b6899bd6

xua_asp_fsm: XUA_ASP_E_ASPTM_ASPAC: Validate RCTX AS is associated to ASP

Previously we only validated that a local AS was configured for the
provided routing context, but we didn't validate that the AS was actually
associated to the requesting ASP.

Change-Id: Idcd51b9bbe38064ed03d076a76279384a3927334

xua_rkm: handle_rkey_reg(): Skip AS ilookup of known free RCTX

There's no need to attempt a look up for an AS with a RCTX we just
ensured is not yet allocated to any AS.

Change-Id: I40719527c527db58244972a797c4287107306532

xua_find_as_for_asp(): Optimize lookup

Instead of looking up on all AS configured in an instance, look up on
the subset associated to the ASP we are looking up for.
Since we are also not looking a 2nd pass to then validate if ASP and
returned AS is related, in worst case this would split lookup complexity
by half.

Change-Id: If85ad27ad5e55be0c22e2716fa7329409a7b85b5

handle_rkey_dereg(): Optimize lookup

Instead of looking up on all AS configured in an instance, look up on
the subset associated to the ASP we are looking up for.
Since we are also not looking a 2nd pass to then validate if ASP and
returned AS is related, in worst case this would split lookup complexity
by half.

Change-Id: I56ac5caef9bcded9dd08ca532a413af94070a1bd

osmo_ss7_find_free_{rctx,l_rk_id}(): Make more robust to wrap-around

Previous versions of those functions would end up broken over time after
~2^32 were allocated, turning the program into an unusuable stte.

Change-Id: Ie10f4048d0af384dc84c79e6fc441c8537649d55