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Harald Welte laforge at gnumonks.orgHi Sylvain, On Wed, Jun 09, 2010 at 09:43:07AM +0200, Sylvain Munaut wrote: > One thing I didn't yet figure out is the HLR part on how to have a > neat interface to store retrieve keys / authentication methods > available and previous tuples. What's currently implemented is not > good, I misuse the AuthTuple thing to store current authentication and > not possible tuples to use when we don't know Ki. I have to check your code. My idea was to have two tables, one for actual keys (ki), and the other one for auth tuples. The tuples would probably need a 'last used' counter, so we can make sure we don't use the most recently used tuples again. Once we move to a 'more real' HLR, there will be an asynchronous request from MSC to HLR to obtain authentication tuples. Those tuples are then stored in the MSC-internal (volatile) VLR. > > well, it is not ready (as it is untested right now and I had to do lots of > > manual fixes during rebase) ... and it introduces lots of layer3 code > > (encryption command, etc) in the regular gsm_04_08.c file... > > Should those go elsewhere ? How should it be split ? We right now have gsm_04_08.c and gsm_04_08_utils.c... The _utils.c is used from both 'real BSC' and bsc_hack, and the plain 04_08.c is used only by the bsc_hack. So you actually have it in the right file, I was wrong. Thus, we could merge it. However, this part will nonetheless probably change a lot once we make the split... > I put gsm48_secure_channel (and supporting code) in gsm_04_08.c mainly > because it needs to be called when there is a location update request > (among other cases) and the loc update handling code is entirely in > gsm_04_08.c sure. > I guess I must read on on what exactly is MSC domain and what is BSC > domain, so far I mostly focused on 04.08 without paying attention to > who is supposed to handle what ... I think in general it's quite simple. The BSC handles RR (like channel request, immediate assign, paging), whereas MM, CC, SMS, etc. are handled by the MSC. Regards, Harald -- - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)