The flag PCU_IF_FLAG_DT is no longer needed. The PCU implementation will
distinguish by the version number instead.
Change-Id: I0dc20e351deb14906b2edffc39499bad9659cc35
Related: OS#5198
When updating the BTS information in the bsc co-located PCU, first check
if the BTS has a BSC co-located PCU at all. Also check if the BTS is E1
based since those type of BTS require extra information about the E1
connection.
Related: OS#5198
Change-Id: I8da26debc0e27f24fae4ee88f22f8875de13bc84
The variable rc holds the return code of accept(), which returns a file
descriptor on success. So lets call the variable "fd" to make this
clear.
Change-Id: Ic8d22c2af18477f110a3a9115434314ebca95b25
When the IMMEDIATE ASSIGNMENT is sent from the PCU to the BSC using the
"direct TLLI" method, the TLLI (and the last three digits of the IMSI)
is prepended to the MAC block. Currently we are taking the fields apart
manually using offsets. The code for this is difficult to read and the
method is error prone. Let's define a struct that we can just overlay
to access the fields directly. Let's also transfer the full IMSI.
Change-Id: Id6acbd243adf26169e5e8319dd66bb68dd6a3c22
Related: OS#5198
When the PCU is disconnected while the BSC keeps running the PDCH should
be closed. Also the PDCH should be reopened when the PCU is
reconnected.
Change-Id: I9ea0c53a5e68a51c781ef43bae71f947cdb95678
Related: OS#5198
When a data request is received from the PCU, some of the switch cases
allocate a message buffer but the message buffer is only used to pass
its data and length to other functions. The message buffer itself is not
passed anywhere and it is also not freed. Lets get rid of the message
buffer and avoid unnecessary memcopy calls.
Related: OS#5198
Change-Id: Ibfaae177585a4d42d797b6bbd90e402641620140
The PCU is able to send OML alerts via the BTS to the BSC. When the PCU
operates in co-location to the BSC we just print the alerts in the log
directly
Change-Id: Id32553556356c2affe32e47ae1c3ae6a514efdce
Related: OS#5198
osmo-bsc requires the PCU to tag IMMEDIATE ASSIGNMENTS that shall be
sent via PCU with a TLLI. This is required to confirm the sending of the
IMMEDIATE ASSIGNMENT messages to the PCU.
Related: OS#5198
Change-Id: Ib804143a57824632e5435f7ba68f2e94f5f3fb21
The BSC has all information about the E1 line configuration of each
timeslot/channel. The PCU is responsible for opening and managing the
CCU connection. To enable the CCU to do that, we have to transfer the E1
connection information (which TS, SS, rate) to the PCU.
Change-Id: I6d44373336b41009ff4c6e459d32d0a81081676c
Related: OS#5198
The PCU needs to be aware of the current system information in order to
work properly.
Change-Id: Ibbfbfaf588a4e406804c36570010aefdfc14328b
Related: OS#5198
We have introduced the function extract_paging_group() with the previous
patch. Lets use it for PCU_IF_SAPI_PCH as well to remove code
duplication
Change-Id: If4ffe8eafd2e54e323cbc075c09d457a74ebe83f
Related: OS#5198
The IMMEDIATE ASSIGNMENT for downlink TBFs needs to be sent through the
PCH instead of the AGCH. Since this method is not specified in RSL, it
is usually a vendor specific extension.
Change-Id: I4452f4973d1ec69c96aad527b057226e8a6edf99
Related: OS#5198
The current name of PCU_IF_SAPI_AGCH_DT is a bit misleading as it
describes a method to send immediate assignment messages (normally AGCH)
via the PCH. The name in the constant should reflect that correctly
Change-Id: I78abeb62d0267baa31a4727c4bdd027b7230f137
Related: OS#5198
The intended endienaess for the remote_port member is host byte order,
while the endianess in the nsvc struct is in network byte order.
(see also pcu_sock.c in osmo-bts.git)
Change-Id: Ib62dcceb80fd500e477dd5e1a0e43de47e16eeb0
Related: OS#5198
Before filling in the TS in the info indication, it is checked that the
MO opstate is enabled. Also it is checked that the TS serves a PDCH.
Lets restructure this check and move the PDCH check into a helper
function as we need to check for PDCH from other location as well later.
Change-Id: Icaab52ab73c38889dfadb523b89bb54cafacc99a
Related: OS#5198
Make sure that the TRX MO state is enabled and unlocked before filling
in any TRX information into the info indication
Change-Id: I7a93826e6b0df187425310cb82854e7d7fb47e72
Related: OS#5198
The function pcu_tx_info_ind() fills the trx information in the info
indication. Since the function is already quite long, move the trx
related part into a sperate helper function.
Change-Id: Ic30185c9364adcc61d0a9d3483b0550ac1cdf894
Related: OS#5198
The pcuif only supports a limited but sufficient number of TRXs. When
filling in the TRX array in info_ind, we must guard against overflowing
the maximum number of TRXs
Change-Id: I351080a112f3d3fdf833ee7fa0d77c4cd1d13e42
Related: OS#5198
The function trx_get_hlayer1() is defined as a prototype but it is not
used anywhere and there is also no implementation, lets drop it.
Related: OS#5198
Change-Id: I91ead9379140e971ccabc83cbf2b62b8aa1fc8a2
in osmo-pcu, the message buffer in pcu_sock_read is allocated with 1000
bytes in addition to the true size of the pcu_prim struct. Presumably
this is to avoid compatibility problems in case the primitives slightly
grow due to appending new struct members. Lets do the same in osmo-bts.
Change-Id: I99f5204b0563f72f9da427bb7aa5451552d8c5b5
Related: OS#5198
The pcu_sock interface in osmo-bts does check the size of the primitives
it receives. Lets do the same in osmo-bsc as well.
Change-Id: I247c6f4b5a7a22d17a060a558c4ceb9221ca7351
Related: OS#5198
pcu_sock_read() may not free the message buffer in case the recv
returned errno EAGAIN. This is already fixed in osmo-bts, lets fix it in
osmo-bsc as well.
Related: OS#5198
Change-Id: I49eda447fc1912c1f7f25ba07331cb84decf4548
pcu_sock.c: In function ‘pcu_tx_info_ind’:
pcu_sock.c:197:2: error: #warning "isn't dl_tbf_ext wrong?: * 10 and no ntohs" [-Werror=cpp]
197 | #warning "isn't dl_tbf_ext wrong?: * 10 and no ntohs"
| ^~~~~~~
pcu_sock.c:199:2: error: #warning "isn't ul_tbf_ext wrong?: * 10 and no ntohs" [-Werror=cpp]
199 | #warning "isn't ul_tbf_ext wrong?: * 10 and no ntohs"
| ^~~~~~~
they made it here from osmo-bts.git
(b4999b60d4 states that the PCUIF support
was copied from there). The gitlog shows that these warnings were added
in 744f745d7a508605254afa8f78412ad410d153b0 by jolly (in 2012!)
together with the PCUIF support, and before
c1368d4ebe49f8e01f1f5fff3bc3583cb5960c1d these warnings were in German:
"ist dl_tbf_ext nicht falsch?"
As nobody has bothered for the past ten years, degrade them to comments.
Change-Id: I9ef7e18f56aa86b48f0ffeec58406260736170f3
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: Ifbbafe185931c0f508ff8148ef244f25a9620fd8
These are not needed anymore since we re-introduced libbsc, specially to
avoid all this churn.
Some specific methods are explicitly required to be overwritten by
tests, so we specificially mark those with __attribute__((weak)) in
order to be able to overwrite them.
This is the last step towards fixing interdependency mess of symbols and
stubs, and requires previous patches in order to have tests apssing
fine.
Change-Id: Ic7401b8a6eb903882e30fda1cf091ac99a254ef0
The only real 1-1 relationship between BTS NM objects is the one between
GPRS Cell and BTS (which is actually a BTS cell).
In our current osmo-bts implementation we don't care much since we only
handle 1-cell BTSses, but let's make the data structure organization
more generic.
Implementation notes:
The gsm_bts_sm is moved to its own file, APIs to allocate are added and
the new public object is hooked correctly in the allocation process of
osmo-bsc.
Change-Id: I06461b7784fa2a78de37383406e35beae85fbad8
Introduce a address_type in the NSVC configuration pass the given
protocol. The remote_ip is network byte order, the default
encoding for in_addr and in6_addr.
Related: Iae854875a45dbc29cd46a267ccaf60f1f2ac2973
Related: SYS#4915
Change-Id: I740be0a401612bb5ed4e8ccd7f4be8176b936449
Place all code related to the object into the related file.
Having all the data model in one file made sense in early stage of
development to make progress quickly, but nowadays it hurts more than
helps, due to constantly growing size and more and more bits being
added to the model, gaining in complexity.
Currently, having lots of different objects mixed up in gsm_data.h is a hole
of despair, where nobody can make any sense were to properly put new stuff
in, ending up with functions related to same object in different files
or with wrong prefixes, declarations of non-existing functions, etc.
because people cannot make up their mind on strict relation to objects
in the data model.
Splitting them in files really helps finding code operating on a
specific object and helping with logically splitting in the future.
Change-Id: I00c15f5285b5c1a0109279b7ab192d5467a04ece
New define is available since libosmocore 1.1.0, and we already require
1.3.0, so no need to update dependenices.
Let's change it to avoid people re-using old BSC_FD_* symbols when
copy-pasting somewhere else.
Change-Id: Ia5a656567d212fa265aef1375d714d0c5fee5dd6
Add FSMs:
- timeslot_fsm: handle dynamic timeslots and OML+RSL availability.
- lchan_fsm: handle an individual lchan activation, RTP stream and release,
signal the appropriate calling FSMs on success, failure, release.
- mgw_endpoint_fsm: handle one entire endpoint with several CI.
- assignment_fsm: BSSMAP Assignment Request.
- handover_fsm: all of intra, inter-MO and inter-MT handover.
Above FSMs absorb large parts of the gscon FSM. The gscon FSM was surpassing
the maximum amount events (32), and it is more logical to treat assignment,
handover and MGW procedures in separate FSMs.
- Add logging macros for each FSM type:
- LOG_TS()
- LOG_LCHAN()
- LOG_MGWEP(), LOG_CI()
- LOG_ASSIGNMENT()
- LOG_HO()
These log with the osmo_fsm_inst where present.
New style decision: logging without a final newline char is awkward,
especially for gsmtap logging and when other logs interleave LOGPC() calls;
we have various cases where the final \n goes missing, and also this invokes
the log category checking N times instead of once.
So I decided to make these macros *always* append a newline, but only if
there is no final newline yet. I hope that the compiler optimizes the
strlen() of the constant format strings away. Thus I can log with or without
typing "\n" and always get an \n termination anyway.
General:
- replace osmo_timers, state enums and program-wide osmo_signal_dispatch()
with dedicated FSM timeouts, states and events.
- introduce a common way to handle Tnnn timers: gsm_timers.h/.c: struct T_def.
These can be used (with some macro magic) to define a state's timeout once,
and not make mistakes for each osmo_fsm_inst_state_chg().
Details:
bsc_subscr_conn_fsm.c:
- move most states of this FSM to lchan_fsm, assignment_fsm, handover_fsm and
mgw_endpoint_fsm.
- There is exactly one state for an ongoing Assignment, with all details
handled in conn->assignment.fi. The state relies on the assignment_fsm's
timeout.
- There is one state for an ongoing Handover; except for an incoming Handover
from a remote BSS, the gscon remains in ST_INIT until the new lchan and conn
are both established.
- move bssmap_add_lcls_status() to osmo_bsc_lcls.c
abis_rsl.c:
- move all dynamic timeslot logic away into timeslot_fsm. Only keep plain send/receive functions in
abis_rsl.c
- reduce some rsl functions to merely send a message, rename to "_tx_".
- rsl_ipacc_mdcx(): add '_tx_' in the name; move parts that change the lchan state out into the
lchan_fsm, the lchan->abis_ip.* are now set there prior to invoking this function.
- move all timers and error/release handling away into various FSMs.
- tweak ipa_smod_s_for_lchan() and ipa_rtp_pt_for_lchan() to not require an
lchan passed, but just mode,type that they require. Rename to
ipacc_speech_mode*() and ipacc_payload_type().
- add rsl_forward_layer3_info, used for inter-BSC HO MO, to just send the RR
message received during BSSMAP Handover Command.
- move various logging to LOG_LCHAN() in order to log with the lchan FSM instance.
One drawback is that the lchan FSM is limited to one logging category, i.e. this moves some logging
from DRR to DRSL. It might actually make sense to combine those categories.
- lose LOGP...LOGPC logging cascades: they are bad for gsmtap logging and for performance.
- handle_classmark_chg(): change logging, move cm2 len check out of the cm3 condition (I hope that's
correct).
- gsm48_send_ho_cmd(): split off gsm48_make_ho_cmd() which doesn't send right away, so that during
inter-bsc HO we can make an RR Handover Command to send via the MSC to the remote BSS.
assignment_fsm.c:
- the Chan Mode Modify in case of re-using the same lchan is not implemented
yet, because this was also missing in the previous implementation (OS#3357).
osmo_bsc_api.c:
- simplify bsc_mr_config() and move to lchan_fsm.c, the only caller; rename to
lchan_mr_config(). (bsc_mr_config() used to copy the values to mr_bts_lv
twice, once by member assignment and then again with a memcpy.)
- During handover, we used to copy the MR config from the old lchan. Since we
may handover between FR and HR, rather set the MR Config anew every time, so
that FR rates are always available on FR lchans, and never on HR lchans.
Depends: I03ee7ce840ecfa0b6a33358e7385528aabd4873f (libosmocore),
I1f2918418c38918c5ac70acaa51a47adfca12b5e (libosmocore)
Change-Id: I82e3f918295daa83274a4cf803f046979f284366
Philipp Maier
Pau Espin
Harald Welte
Oliver Smith
Alexander Couzens
Martin Hauke