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The existing gsm_04_08.c implementation is mixing BSC and MSC
behavior. Move some simple parsing and generation functions over
to gsm_04_08_utils.c to allow a different MSC to define the policy.
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Currently we have circular dependencies from libbsc to libmsc
and this requires to play some linker tricks. The problem will
be solved in two ways, first we will get rid of the circular
dependencies and second we can start using --start-group and
--end-group of the linker to play the tricks for us.
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For the BSC part we still assign a gsm_subscriber to lchan but it
might only contain the TMSI of this subscriber.
For the MSC part we will need the HLR/VLR feature of the gsm_subscriber,
specially the lookup's by number...
So if libbsc.a/libmsc.a are compiled in one app and used the
subscribers will be shared, and if only libbsc.a gets used we will
have more empty gsm_subscriber.c..
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Attempt to split up bsc/msc functionality according to the specs. The
libbsc.a will be responsible for communicating with the BTS, configuring
it, paging, channel allocation and passing layer3 messages in both
ways. libmsc.a will implement the policy and such.
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The test for the 7bit encoding and decoding remains in the code. The
test didn't compile and the code changed too much so the current test
didn't make any sense.
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Next round should be using them again
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This is simulating a successfull request and is causing
a segfault. The test is done with a "mock object" in this
case a minimalistic paging implementation which is enough
to show the crash.
Compare that the callback data is supposed to be the same....
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