Remove the paragraph about writing to the Free Software Foundation's
mailing address. The FSF has changed addresses in the past, and may do
so again. In 2021 this is not useful, let's rather have a bit less
boilerplate at the start of source files.
Change-Id: I4a49dbeeec89b22624c968152118aecf8886dac6
The whole paging path and data structre is cleaned up.
New MS helpers ms_imsi_is_valid() and ms_paging_group() are introduced
to help in the process and keep implementation details inside GprsMs
class.
Related: OS#5303
Change-Id: I4c0838b26ede58e4b711410eee2a8e4f71e9414b
Code above setting the timer in same tbf_fsm already has this kind of
assert, but it helps understanding the code having this assert here.
Change-Id: I7588deef5073694eb5fecdb516c241a04594e2b0
Seen on a runnig osmo-pcu against real MS:
"""
pdch_ul_controller.c:329 PDCH(bts=0,trx=1,ts=7) Timeout for registered POLL (FN=751140): TBF(TFI=0 TLLI=0xe8c12143 DIR=UL STATE=ASSIGN EGPRS)
tbf.cpp:542 TBF(TFI=0 TLLI=0xe8c12143 DIR=UL STATE=ASSIGN EGPRS) poll timeout for FN=751140, TS=7 (curr FN 751140)
tbf.cpp:384 TBF(TFI=0 TLLI=0xe8c12143 DIR=UL STATE=ASSIGN EGPRS) N3105 exceeded MAX (8)
tbf.cpp:594 TBF(UL-TFI_0)[9bc050]{ASSIGN}: Received Event MAX_N3105
tbf.cpp:594 TBF(UL-TFI_0)[9bc050]{ASSIGN}: Event MAX_N3105 not permitted
"""
It was first though when FSMs where introduced that an FSM in ASSIGN
state could not receive this kind of event because it was believed to be
sending no CTRL blocks at all until flow state. That's because the
believe was that Assignment over PACCH was done by another existing TBF.
It turns out this is usually the case, but not in all cases. In at least
one case, the tbf object (and tbf_fsm/tbf_{ul,dl}_ass_fsm) itself is
handling its own assignment (hence eg. sending the UL assignment and waiting
response through tbf_ul_ass_fsm. This happens if a UL TBF sends a Pkt
Resource Req as a response to RRBP of final UL ACK/NACK in order to
request a new TBF, where it temporarily uses the control_ts of the
previous TBF to get a new Pkt UL Assignment over PACCH.
If Pkt Ul Assignment doesn't receive a CTRL ACK, tbf_ul_ass_fsm will
retrnamist it, until MAX_N3015 is reached (the event we failed to
handle until now). At this point, we really want to transition to
RELEASING in order to avoid keeping the TBF allocating resources (until
X2001 times out).
Related: SYS#5647
Change-Id: I86d5c1bbccd06673d08451b812d149e727404733
This helps distinguishing the case where a TBF is in the initial state
and the unexpected case where osmo_fsm_inst_state_name reports "NULL"
due to fi pointer being NULL.
Change-Id: Ieaabfc9fa0dedb299bcf4541783cf80e366a88c3
Fixes following error log line:
"{RELEASING}: Event DL_ACKNACK_MISS not permitted"
Rationale: We may move to RELEASING state at some point, for instance
due to MAX_N3101/MAX_N3105 while still having some active poll
registered in some PDCH ulc. Upon that poll (most probably) timing out,
it will send a DL_ACKNACK_MISS event to us. Since we are already
determined to release the TBF (waiting for T3195 or T3169 to trigger),
simply ignore the event and avoid logging an error.
Fixes: OS#5240
Change-Id: Ibfb49356d2b3b5fccb6d59db8593b2256e5c51fb
The side effect is that the timer is enabled for other scenarios where a
PACCH assignment happens, like an Assignment Reject or Ul Assignment
(that's why there's more lines showing up now in TbfTest.err).
Change-Id: Ib8ab2f7397ad05c6fcd5dd74af55a1e2c56e1463
PdchUlcTest output changes because the original state NULL is not
expected when transactioning to RELEASING upon MAX N310* being hit. In
any case, none of those events should happen in NULL state, but we
don't really care about TBF states there so we are fine with whatever
the state is.
Related: OS#2709
Change-Id: I516b8d989a0d705e5664f8aeaf7d108e0105aa16
While at it, method maybe_start_new_window is renamed to
rcvd_dl_final_ack to make more sense out of the code.
Related: OS#2709
Change-Id: Iebd650c1036ef2d5132789778be7117ce3391c01
At some point later in time the state_flags will most probably be split
into different variables, one ending up in a different FSM. It is moved
so far to the exsiting FSM from the C++ class since it's easier to
access it from C and C++ code, and anyway that kind of information
belongs to the FSM.
Related: OS#2709
Change-Id: I3c62e9e83965cb28065338733f182863e54d7474
This is only an initial implementation, where all state changes are
still done outside the FSM itself.
The idea is to do the move in several commits so that they can be
digested better in logical steps and avoid major break up.
Related: OS#2709
Change-Id: I6bb4baea2dee191ba5bbcbec2ea9dcf681aa1237
Oliver Smith
Pau Espin