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The method was more than 300 hundred lines of code. Split the
selection of the index and the creation of the dl_msg.
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Begin to move state of the LLC into a separate object. This will
allow to make side-effects more clear and kill some code duplication.
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This will be moved to a LLC class in the future but after this
we can make the sns/ws private now and have little to update
outside the tbf.
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Have one IMSI field per TBF and assign through a function call.
The IMSI should be used to look-up the TBF on the SGSN->PCU
direction.
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All logging code that used tbf->tfi is now using tbf_name to
print the the TBF. External code is now using tfi() which is
inlined and should result in the same code being generated as
before (+debug code that can be stripped).
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Now all updates to the tlli/tlli_valid are in one place. If we
implement the policy to update the matching/linked TBF we can
now to do it in a single place. Add a todo item for that as I
am waiting for feedback from the mailinglist.
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This is like gsm_lchan_name and should be used in log statements.
This way we can easily change the information that is printed and
we know how to search things. The other part is that direct use
of tfi/tlli is removed which will allow us to make them private
and at the same time start to resolve the "tlli" updated in many
places.
Not old log statements are changed yet. This will done whenever
a bad log statement is seen on the console...
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We can now remove the gprs_rlcmac_data as the code has been
moved into the tbf, pdch and bts.
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Again the function was called send but didn't do any sending
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The method was called send but didn't send anything. Move
it to the tbf
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This method was called _send_packet_ but actually didn't do any
sending at all. It just formated the right assignment. I replaced
tbf-> with nothing.
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Move the gprs_rlcmac_poll_timeout method into the tbf class and
gprs_rlcmac_downlink_assignment into the BTS.
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The timer is used for various timeouts and there is still external
client code that is calling it. In a perfect world the client code
would indicate that an event has happened and the internal timer
will be stopped. The best compromise is the "stop_t3191" method. It
allows to add semantic verification that the timer has been running.
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Move the method into the PDCH. Extract the finding of TLLI into a
new class called Decoding. Move the assemble and forward LLC frames
into the TBF as it is poking in the internals of the TBF.
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The code in gprs_rlcmac_data should ask the TBF for help in packing
the frames but it really shouldn't poke in the internals of the
tbf structure. This is very bad capsuling and has plenty of copy
and paste.
At the same thime this will be the most dangerous refactoring of
the code base.
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The list belongs to the BTS. This makes cleaning this up more easy
and establishes a hierachy of resources that start from the BTS. The
debug_diagram code is now broken.
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This is preparing the next commits and will ease working with
the debug_diagram when the global lists are killed. It will
simplify the APIin the long run.
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The PollController is a friend of the SBAController and is allowed
to access the internal list. The list is hidden from everyone else.
This is done because the calculation of timeout should belong into
the PollController and not into the SBAController.
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Begin to make the BTS a real C++ object with real responsibilities.
The biggest issue will be the pcu_vty.c that might not like C++
at all.
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Kill all the level of indirections where one needs to have the BTS
the TBF to find the TRX.
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There really shouldn't be too many callers of state. Instead the
tbf should dispatch depending on the internal state. For now
introduce state_is and state_is_not accessor functions so we can
start to see who is using the internal state.
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Introduce the first instance method for printing out diagonistic
about itself and create a jump function for it.
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Move the code out of the sysmocom_socket (as this is only required
to talk to our hardware) and into the TBF class that actually knows
what a TBF is.
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This is the begin of a long march of turning tbf into a C++ class
and properly hiding the secrets inside this implementation instead
of having it spread across various different files.
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Add the bts parameter to the method list. This would be a static
method of the class (in case the TBF would be a class)
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The TBF should use the IMSI to identify a block flow but all
handling is spread across the entire code. Start to clean this
up by moving relevant code into the tbf file. Afterwards one
can clean up and add more internal structure.
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