Commit Graph

125 Commits

Author SHA1 Message Date
Neels Hofmeyr 3779494d4b LCS: disable Lb interface by default, add vty 'smlc' / 'enable'
To not modify previous SCCP behavior of OsmoBSC, keep the Lb interface disabled
by default. The following configuration enables the Lb interface:

  smlc
   enable

Change-Id: I01314a29a2cad6f325d9f4687a9dedca6b90a3ce
2020-10-15 05:39:09 +02:00
Neels Hofmeyr c27ae2da55 BSSMAP RESET: generalize a_reset FSM
Separate the a_reset FSM implementation from BSSMAP and MSC specifics, so that
it can be re-used on the Lb interface.

Move the FSM implementation to bssmap_reset.c and tweak, to match common practices we
have generally established in our osmo_fsm implementations.

Keep a_reset.h and a_reset.c and redirect to bssmap_reset.c.

A difficulty is setting a proper logging category: the FSM definition allows
only one fixed logging category for FSM state transitions and events. Ideally,
the BSSMAP reset fsm would log on DMSC, and the BSSMAP-LE reset fsm would log
on DLCS. Since that is not possible, introduce a separate DRESET logging
category. This in fact matches an item on my wishlist, because if a given MSC
is configured but currently not connected, the previous RESET FSM would
continuously "spam" log LOGL_NOTICE messages indicating that it is resending
RESET, and I often want to silence those messages without silencing the entire
DMSC category. This is now easily possible by setting DRESET logging to
LOGL_ERROR. There is additional "link up" / "link lost" logging on DMSC, so all
interesting info is still visible on DMSC.

Change-Id: Ib3c3a163186c40a93be0dea666230431172136df
2020-10-15 05:28:24 +02:00
Neels Hofmeyr 4ae338d5b6 LCS: implement the bulk of Location Services
Depends: I4d7302a4853518916b6b425e710c10568eb2ffe5 (libosmocore)
Change-Id: I28314ba97df86a118497e9b2770e2e6e2484e872
2020-10-09 00:26:02 +02:00
Vadim Yanitskiy d3d8e91bda vty: add attributes to VTY commands indicating when they apply
Change-Id: I3bf9223295fc4a2fcb4046a1f29f792ff6a41d51
Related: SYS#4937, OS#1601
2020-10-08 07:18:12 +00:00
Vadim Yanitskiy 127aeddab9 generate_ma_for_ts(): simplify MA bit-mask computation
Instead of maintaining two variables and re-calculating the bit
position on each iteration, let's use the existing field of the
bit-vector: set it to the first LSB and decrement in the loop.

Change-Id: I1b226a2d5867434c33ae04a0b971dbfd16c4688f
Related: SYS#4868, OS#4545
2020-09-17 15:28:34 +00:00
Philipp Maier 1482ec4813 abis_rsl.c: flush channel request queue on RSL bootstrap
When RSL link is bootstrapped the BSC should clear the channel request
queue.

Change-Id: Iefb333817033e8d376184b58d89b186d875b968f
Related: OS#4549
2020-09-11 14:38:54 +02:00
Vadim Yanitskiy 422b751ac8 fix bootstrap_rsl(): check result of gsm_bts_trx_set_system_infos()
Ensure that osmo-bsc would not continue to work as usual, if for
some reason we cannot encode or send System Information messages.

Change-Id: I7d3458fb10760e33411f2074a6b2df1c257438d5
2020-09-08 20:19:18 +00:00
Vadim Yanitskiy e2b20c4aa8 generate_ma_for_ts(): fix: properly encode ARFCN 0 (corner case)
According to 3GPP TS 44.018, table 10.5.2.21.1 "Mobile Allocation
information element", in the cell allocation frequency list the
absolute RF channel numbers are placed in increasing order, except
that ARFCN 0, if included in the set, is put in the last position.

This basically means that the last bit of the Mobile Allocation
(MSB on the wire) corresponds to ARFCN 0, if it's included in
the cell allocation frequency list, or the last channel otherwise.

Recently introduced TTCN-3 test cases uncover the following problems:

  a) ARFCN 0 is encoded twice: as MSB and LSB of the bit-mask,
  b) ARFCN 0 is encoded one bit off its expected location.

Change-Id: I264a66a1405e72940a79e9e20ad6ad8f269a7bbc
Related: SYS#4868, OS#4545
2020-09-06 22:40:04 +07:00
Vadim Yanitskiy 31fab3e8de generate_ma_for_ts(): use OSMO_BYTES_FOR_BITS() macro
Change-Id: I119f930e9cb5d6e52d4b0e1160604c709d942a18
2020-09-06 14:48:11 +07:00
Pau Espin da5b2f8094 Support setting rt-prio and cpu-affinity mask through VTY
Depends: libosmocore.git Change-Id If76a4bd2cc7b3c7adf5d84790a944d78be70e10a
Depends: osmo-gsm-masnuals.git Change-Id Icd75769ef630c3fa985fc5e2154d5521689cdd3c
Related: SYS#4986
Change-Id: Ie68883666657fc8faa76e2422335c0ceb98c5a88
2020-08-20 08:40:17 +00:00
Pau Espin 388ed58482 Move struct gsm_bts: gsm_data.* => bts.*
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
2020-07-18 21:45:32 +00:00
Pau Espin 58c9be1d6c bsc_main: Use LOG_TRX in log line
Change-Id: I88b5f572cb2bae8ffa551789e2c344ec2ebb7e7b
2020-07-14 13:01:58 +02:00
Pau Espin fda5d36318 bsc_main: Improve log line on Lost E1 link
Change-Id: Ia9f8d14d547b2443713fc406ac5c1005351f8cce
2020-07-14 12:52:31 +02:00
Vadim Yanitskiy 6c7149be3c generate_ma_for_ts(): constify per cell/timeslot ARFCN bit-vectors
Change-Id: If750003beb8653cf67fd192fa5c16343138155c9
2020-07-03 03:47:35 +07:00
Vadim Yanitskiy f6983f68a9 system_information: publicly declare generate_cell_chan_list()
Change-Id: Idc7a9ed558ed6897e15a0f6d3c23418db7cee0d0
2020-07-03 03:27:17 +07:00
Pau Espin cce0ae11b6 Avoid selecting channels from administratively locked trx
Found while playing with "rf_locked 1" on a 2TRX setup with channel
allocator descend. After applying the setting, the 1st TRX is still used
to allocate the channels. After this patch is applied, the BSC correctly
allocates channels from TRX0.

Change-Id: I5201d2749363c9cbd0706177bde09117b163cbe3
2020-06-23 14:21:20 +00:00
Neels Hofmeyr 83bba52b5c osmo-bsc main: exit on cmdline option error
Change-Id: I7c3432790a77ae9081d2c458ee9f598e435e089d
2020-06-16 10:16:30 +00:00
Neels Hofmeyr 77c330d57c add osmo-bsc --vty-ref-xml: dump VTY ref XML to stdout
Add only a long option to not clutter the cmdline namespace.

To add a long option without a short letter is slightly complex: use the 'flag'
and 'val' mechanism as in 'man 3 getopt' to write an option index to
long_option.

Depends: Ic74bbdb6dc5ea05f03c791cc70184861e39cd492 (libosmocore)
Change-Id: I316efedb2c1652791434ecf14a1e261367cd2fb7
2020-06-16 10:16:30 +00:00
Neels Hofmeyr 06a14d289b flatten: move network->bsc_data->* to network->*
The separate struct osmo_bsc_data is like another separate struct gsm_network
for no reason. It is labeled "per-BSC data". These days, all of this is a
single BSC and there will not be different sets of osmo_bsc_data.

Drop struct osmo_bsc_data, move its members directly into gsm_network.

Some places tested 'if (net->bsc_data)', which is always true. Modify those
cases to rather do checks like 'if (net->rf_ctrl)', which are also always true
AFAICT, to keep as much unmodified logic as possible in this patch.

Change-Id: Ic7ae65e3b36e6e4b279eb01ad594f1226b5929e0
2020-05-29 20:16:40 +00:00
Neels Hofmeyr 5cda1d01b4 drop IMSI filter and libfilter completely
Filtering by IMSI in osmo-bsc is a legacy use case with questionable
usefulness. Remove.

Do not keep deprecated VTY commands: those could be dangerous, since
(presumably non-existing) users might assume that the filtering would still be
in place. Rather fail to start osmo-bsc for config with an IMSI ACL.

The IMSI filtering did, if present, provide the logging with an IMSI to print
for the bsc_subscriber. TMSIs should have ended up in logging likewise, which
has never been implemented. The proper way to learn the IMSI would be by the
Common Id message from the MSC. Furthermore, the upcoming MSC pooling feature
will extract the mobile identity again, and will hence make sure that both IMSI
and TMSI identities, as available, end up in the bsc_subscriber and will be
logged again.

So long, IMSI ACL, and thanks for all the fish.

Change-Id: I89727af5387e8360362e995fdee959883c37d89a
2020-05-27 01:56:06 +02:00
Vadim Yanitskiy 9077f1ab6c vty: fix: restore removed DNAT category as deprecated
This logging category has been removed in [1], what caused test
case execution failures on our Jenkins (since build #930). The
problem is that configuration files may still contain this
category in 'logging' section (see [2], [3], [4]), and
osmo-bsc would refuse to start because of that.

[1] Id965295dfe04f8bd5ce831db70c86f67b8dc290b
[2] Ie2afacfc15589c26238214cddc00baaf80e993c1
[3] I266d6f6ed54d1457b1ca63b87fc1c29f6dd40caf
[4] If02272c08ba2df37d1295d09c104d11f96abbe1e

Change-Id: I111362d19aba325889bada5a46eea62343c30033
2020-04-05 00:33:04 +07:00
Harald Welte 25e41af2d9 remove 'NAT' log category
This dates back to a time where osmo-bsc_nat was in the same repository,
which is a long time ago.

Change-Id: Id965295dfe04f8bd5ce831db70c86f67b8dc290b
2020-04-01 11:57:37 +02:00
Oliver Smith a595db15ea main: exit on mutually exclusive codecs settings
Refuse to start with mutually exclusive codec settings, unless
allow-unusable-timeslots is set in the network section of the config.
The checks were already implemented and fill the error log if the config
is invalid.

Related: OS#3739
Change-Id: I3ccfc3b0a8641400cb97a23b24d7ed92d2ad25cd
2020-03-19 12:29:22 +01:00
Philipp Maier 40e3f1e3d7 bsc_main: use higher default loglevels.
The loglevels of DNM, DFILTER and DPCU are set to low, lets set them all
to NOTICE

Change-Id: I03a5426b341e9908ffc89240f97d6d3ea791b4a8
Related: OS#2577
2020-01-15 13:23:01 +01:00
Harald Welte 2ca002f4af exit(2) on unsupported positional arguments on command line
Change-Id: I3b8781e220326387f1c437c39aff8661326f1e0a
2019-12-03 21:49:31 +01:00
Harald Welte 630cc6c229 check for osmo_ss7_init() error return value
Change-Id: I0297352e3cba5f01a971dc5924f0fcc67d1e6b32
2019-12-01 13:19:05 +01:00
Neels Hofmeyr 4bf8df5c42 fsm: use deferred deallocation
Since osmo-bsc uses the MGCP client FSMs, it is required to enable this new
feature to guarantee safe operation. The issue is described in detail in commit
logs linked below.

Depends: Ief4dba9ea587c9b4aea69993e965fbb20fb80e78 (libosmocore),
         I0adc13a1a998e953b6c850efa2761350dd07e03a (libosmocore)
Related: I7df2e9202b04e7ca7366bb0a8ec53cf3bb14faf3 (osmo-mgw)
Change-Id: Ib7fce7b7d54dfb87af97544796680919e5929a50
2019-11-23 08:03:39 +00:00
Martin Hauke a29affda98 Fix some typos
Fix typos and common misspellings in code comments and in the manual.

Change-Id: I46fc9d424620c77ae9ccf78b58081bd303386d7c
2019-11-13 22:10:41 +01:00
Vadim Yanitskiy 41eafec3f6 osmo_bsc_main.c: fix CCCH_CONF computation: use pchan_from_config
As can be seen from include/osmocom/bsc/gsm_data.h:

  - pchan_from_config - channel configuration from the VTY/config
    (can be changed from the VTY at runtime, should not affect
    the existing RSL/OML connections);
  - pchan_on_init - channel configuration after the OML link is
    established (pchan_from_config is copied here);
  - pchan_is - the *actual* channel configuration currently active.

Since we call bootstrap_bts() during the initialization, even before
establishing any OML/RSL connections, neither pchan_on_init nor
pchan_is can be used. Let's use pchan_from_config instead.

This change fixes the problem discovered by @mqng2 and reported
together with https://gerrit.osmocom.org/c/osmo-bsc/+/15909:

  CCCH_CONF in System Information Type 3 does not reflect the
  actual channel configuration, and always indicates a single
  CCCH combined with SDCCH. This also misleads the lchan
  allocation algorithm during the MO connection establishment.

Change-Id: I8f9d7aa27f24b55732a4de933bc834ed930806fd
2019-11-02 03:15:10 +07:00
Vadim Yanitskiy 6ab55074f8 osmo_bsc_main.c: simplify computation of CCCH_CONFIG
Do not count the number of additional CCCHs if TS0 is using combined
channel configuration (CCCH+SDCCH4), because they are only allowed
if TS0 is not combined with SDCCH.

Get rid of the 'switch' statement using the following formula:

  CCCH_CONFIG = (N << 1)

where N is the number of additional CCCHs.

Change-Id: I1430500999389e9b30e55ea89a8a5ea5071f7957
2019-11-02 03:02:52 +07:00
Vadim Yanitskiy 73bd463061 osmo_bsc_main.c: verify the physical channel mapping at startup
As per 3GPP TS 45.002, section 3.3.2.3, and table 3 of clause 7,
the following limitations apply mapping of CCCH/BCCH channels:

  - TS0/C0 shall be configured as CCCH/BCCH (optionally combined);
  - combined CCCH (CCCH+SDCCH4) can only be used on TS0;
  - additional CCCHs can be on TS2, TS4, and TS6;
  - additional CCCHs are not allowed if TS0 is combined.

Let's make sure that OsmoBSC is properly configured before starring.

Change-Id: I758ef80f7884ba35cdf59d671ee30222ffb9d68b
2019-11-02 02:48:21 +07:00
Harald Welte d41b7c7f83 Cell Broadcast: CBSP and CBCH scheduling support
This adds code to handle CBSP (Cell Broadcast Service Protocol)
from the CBC (Cell Broadcast Centre), as well as BSC-internal data
structures for scheduling the various SMSCB on the CBCH of each BTS.

There are currently one known shortcoming in the code: We don't yet
verify if keepalives are received within repetition period.

Change-Id: Ia0a0de862a104d0f447a5d6e56c7c83981b825c7
2019-09-02 12:06:25 +02:00
Ruben Undheim 06e6f8a95e Fix some spelling errors found by lintian
Change-Id: I63a733f8bea69f355a6686d99c3aa194c8ac9012
2019-07-16 20:15:53 +00:00
Neels Hofmeyr f14aaa4ba1 move mgw endpoint FSM to osmo-mgw.git
osmo-mgw.git also includes fixes of the MGW endpoint FSM, for example
I92a9944acc96398acd6649f9c3c5badec5dd6dcc.

Depends: I9a3effd38e72841529df6c135c077116981dea36 (osmo-mgw)
Change-Id: I03e6b48d9b0a5370310d5f56809259ff7909cf9d
2019-04-30 02:24:18 +02:00
Pau Espin 8a8052e117 bsc_main: filter_fn: Compare imsi values instead of subscr pointers
Since we actually want to match by IMSI as specified by filter in VTY.
It will allow to match based on other information later.

Change-Id: Ia73fd2f38e42396db8f6d2cc6b2c163aa8f67f3f
2018-12-11 16:13:21 +01:00
Philipp Maier b5208d45b1 codec_pref: check codec configuration before start
In networks with a couple of different BTSs it may be likely that one
accidently sets up a codec configuration (codec-support)) that will be
mutually exclusive towards the codec configuration for the MSC
(codec-list). We need a check that validates the configuration before
start to catch such configuration flaws quickly.

- Add a check that checks each MSC codec-list against each BTS
  codec-support setting.

Change-Id: Ice827896bab1a2330741e0fccc731a04f1a07d38
Related: OS#3625
2018-10-08 09:50:12 +00:00
Oliver Smith 2043db0236 osmo_bsc_main.c: initialize rate counters
main() was missing a call to rate_ctr_init(). Without it, the counters
increased properly, but the times per second / minute / hour etc. values
would always stay at zero.

Change-Id: I4466a7aec51673c79b67614c9dde987633e379e0
Related: OS#3579
2018-10-04 14:07:05 +02:00
Neels Hofmeyr db531c0a37 vty: add SCCP related vty commands
Depends: I214ea51fc6bfa2a9a4dd7c34b43add0c77ffe22e (libosmo-sccp)
Change-Id: I2eb7f5cf9ffceeeb14882190d8545601795d3288
2018-09-27 03:32:11 +02:00
Pau Espin 9862bcb5cd Fix heap-use-after-free due to OML link destruction
ipaccess_drop_oml was being called inside an osmo_fd cb context, were
-EBADF must be returned if the structure holding the osmo_fd is freed.
In the middle of the path (see OS#3495 for path tree) it goes through a
signal dispatch, so it's impossible to make sure we return some value to
the osmo_fd cb. As a result, it is required to defer dropping the OML
Link from current code path and do it through a timer.

Fixes following ASan report:
20180822124927913  <0004> abis_nm.c:787 OC=RADIO-CARRIER(02) INST=(00,00,ff): CHANGE ADMINISTRATIVE STATE NACK CAUSE=Message cannot be performed
20180822124927913  <0004> osmo_bsc_main.c:186 Got CHANGE ADMINISTRATIVE STATE NACK going to drop the OML links.
20180822124927913  <0015> bts_ipaccess_nanobts.c:406 (bts=0) Dropping OML link.
...
=================================================================
==17607==ERROR: AddressSanitizer: heap-use-after-free on address 0x62e000060a68 at pc 0x7f5ea8e27086 bp 0x7ffde92b6d80 sp 0x7ffde92b6d78
READ of size 8 at 0x62e000060a68 thread T0
    #0 0x7f5ea8e27085 in handle_ts1_write input/ipaccess.c:371
    #1 0x7f5ea8e27085 in ipaccess_fd_cb input/ipaccess.c:391
    #2 0x7f5ea9147ca8 in osmo_fd_disp_fds libosmocore/src/select.c:217
    #3 0x7f5ea9147ca8 in osmo_select_main libosmocore/src/select.c:257
    #4 0x555813ab79d6 in main osmo-bsc/osmo_bsc_main.c:922
    #5 0x7f5ea76d02e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0)
    #6 0x555813ab84e9 in _start (/bin/osmo-bsc+0x34d4e9)

Fixes: OS#3495
Change-Id: I7c794c763481c28e8c35dc9b11d27969e16feb3c
2018-08-23 16:47:30 +02:00
Pau Espin 4db98554fd bsc: Use libosmocore API to track osmo_signal structs
libosmocore recently had the new API introduced for this purpose.

Depends: libosmocore Change-Id Id58ca18eb826b8f4183a7cf0dbb2b38cba702a09
Change-Id: Id07260635327617f8da5050af1e906891a89c530
2018-08-17 07:06:08 +00:00
Neels Hofmeyr 3c5612f82b create separate logging categories for lchan,ts,as FSMs
Change-Id: Ie889b8860a4a63c7c22ef65025f690d64cd7330c
2018-07-28 12:18:23 +02:00
Neels Hofmeyr 459113d810 fix: dispatch TS_EV_RSL_DOWN when losing RSL
Noticed by ttcn3-bsc-test: after TC_ms_rel_ind_does_not_cause_bssmap_reset the
test TC_dyn_pdch_ipa_act_deact would fail because RSL was still indicated as
available, and only OML was properly signalled as down.

Before recent commit I4843d03b3237cdcca0ad2041ef6895ff253d8419 to fix nanobts
and use only flags for RSL and OML presence, the timeslot FSM actually checked
RSL link presence and the lacking RSL DOWN event was not noticed.

Change-Id: I66c7fc5fcc676f4960f3d089b8c2ae5bce37ed99
2018-07-28 12:18:23 +02:00
Neels Hofmeyr 31f525e756 large refactoring: use FSMs for lchans; add inter-BSC HO
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
2018-07-28 12:18:23 +02:00
Neels Hofmeyr fec10cfa89 call osmo_xua_msg_tall_ctx_init()
xua_msg allocations should not go unnoticed by our root ctx. libosmo-sigtran
recently added this API to fix that.

Depends: I618878680a096a7f7fc2d83098590f2e4cb08870 (libosmo-sccp)
Change-Id: I8d5edda17be82e0cb4a1af3e2a62cbcb3a2ddda3
2018-07-11 04:29:10 +02:00
Neels Hofmeyr e45d2daab4 cosmetic: name osmo-bsc's root ctx 'osmo-bsc', not 'openbsc'
Change-Id: Ie038bbed436069e7849ba78c3c77c80a68bc3dad
2018-07-11 04:29:10 +02:00
Pau Espin a0f1196eda Rename bsc_msg_acc_lst_vty_init to have more uniform prefix
Change-Id: I6f125d040a8f511590ef67ba8babbd2e01c6bf21
2018-06-28 12:58:53 +02:00
Pau Espin 9ab47eb52d Init access_lists before passing it as a parameter
Previous state is harmless because the pointer is stored but not used in
that function. However, it's more clear this way.

Change-Id: I048ebc120306ea30ea973d6ee16ed84c9f341183
2018-06-28 12:55:49 +02:00
Pau Espin e7d29e34e4 osmo-bsc: Add -V param to print version
Change-Id: I74e0e40ee6b2ce66d76f151528d9a958683944c7
2018-06-15 16:34:00 +02:00
Pau Espin d05d5e6afd osmo-bsc: Clean help description of cmd line parameters
Change-Id: I2ce242e97445785c3f1d965d89e3f1b6ca6a37ab
2018-06-15 15:48:50 +02:00
Harald Welte 7325d9379d Remove unused logging subsystems DCC and DMGCP
We use the newly-introduced logging_vty_add_deprecated_subsys() from
libosmovty to make sure old config files will still parse even after
this change.

Change-Id: Ib4f67bb00e1d5460e643717b53f6a4d81278dc5d
2018-06-09 17:44:12 +02:00
Neels Hofmeyr c19581f268 remove struct bsc_api
struct bsc_api was used to provide an abstract API for both osmo-bsc and
osmo-msc, between BSC and MSC. That's no longer needed, so get rid of it, to
prevent code turbulences it creates for no reason.

Change-Id: I3fd5888c63a0b4f95520a498320aa105a6d60579
2018-06-07 19:09:06 +02:00
Neels Hofmeyr 958f259f95 dissolve libbsc: move all to src/osmo-bsc, link .o files
Move all of libbsc/ into osmo-bsc/, and separate/move some implementations to
allow linking from utils/* and ipaccess/* without pulling in unccessary
dependencies.

Some utilities use gsm_network and gsm_bts structs, which already include data
structures for fairly advanced uses. Move initialization that only osmo-bsc
needs into new bsc_network_init() and bsc_bts_alloc_register() functions, so
that the leaner tools can use the old gsm_* versions without the need to link
everything (e.g. handover and lchan alloc code).

In some instances, there need to be stubs if to cut off linking "just before
the RSL level" and prevent dependencies from creeping in.
- abis_rsl_rcvmsg(): the only program currently interpreting RSL messages is
  osmo-bsc, the utils are merely concerned with OML, if at all.
- paging_flush_bts(): ip.access nanobts models call this when the RSL link is
  dropped. Only osmo-bsc actually needs to do anything there.
- on_gsm_ts_init(): the mechanism to trigger timeslot initialization is related
  to OML, while this action to take on init would pull in RSL dependencies.
utils/ and ipaccess/ each have a stubs.c file to implement these stubs. Tests
implement stubs inline where required.

From src/utils/, src/ipaccess/ and tests/*/, link in .o files from osmo-bsc/.
In order for this to work, the osmo-bsc subdir must be built before the other
source trees. (An alternative would be to include the .c files as sources, but
that would re-compile them in every source tree. Not a large burden really, but
unless linking .o files gives problems, let's have the quicker build.)

Minor obvious cleanups creep in with this patch, I will not bother to name them
individually now unless code review asks me to.

Rationale:

1) libbsc has been separate to use it for osmo-nitb and osmo-bsc in the old
openbsc.git. This is no longer required, and spreading over libbsc and osmo-bsc
is distracting.

2) Recently, ridiculous linking requirements have made adding new functions
cumbersome, because libbsc has started depending on osmo-bsc/*.c
implementations: on gscon FSM and bssap functions. For example, neither
bs11_config nor ipaccess-config nor bts_test need handover_cfg or BSSMAP
message composition. It makes no sense to link the entire osmo-bsc to it, nor
do we want to keep adding stubs to each linking realm.

Change-Id: I36a586726f5818121abe54d25654819fc451d3bf
2018-06-07 19:09:06 +02:00
Harald Welte c997ceb750 Add initial 3GPP LCLS support to OsmoBSC
This code contains the following code:
* receive/parse/interpret LCLS specific BSSMAP IEs and PDUs
* osmo_fsm handling the various states and their transitions
* call leg correlation (finding the other subscr_conn with same GCR)
* communication between the two call-leg LCLS FSMs
* detection of supported / unsupported LCLS configurations
* display of GCR / LCLS information in "show conns"
* switch the media streams locally using MDCX to the MGW

Closes: OS#1602
Change-Id: I614fade62834def5cafc94c4d2578cd747a3f9f7
2018-06-02 20:56:17 +02:00
Harald Welte 68e4be9c84 Remove 'struct bsc_msc_connection' + fix IPA-encapsulated CTRL
The bsc_msc_connection dates back to the old pre-libosmo-sigtran
days, and 90% of the field members weren't used at all (even the
new sigtran specific ones!).  Let's merge what remains into struct
bsc_msc_data.

As a side effect, the already dysfunctional "dest A.B.C.D" VTY
command has been removed from the MSC node.

There's quite a bit of fall-out in the CTRL interface, which was
the code with strongest ties to bsc_msc_connection.  This was
resolved by properly porting CTRL handling over to libosmo-sigtran,
meaning that an IPA/SCCPlite connected MSC can now again send CTRL
GET/SET commands, and can also receive those selective few TRAPs
that old osmo-bsc-sccplite also sent to its MSC[s].

Change-Id: I6b7354f3b23a26bb4eab12213ca3d3b614c8154f
Related: OS#2012
2018-05-27 20:17:02 +02:00
Keith Whyte d925c7c00f Cosmetic: Fix typo: Siganlling->Signalling
Change-Id: I92b39eebfba396ee7690e99de09ee20593b7139d
2018-04-16 16:19:19 +00:00
Neels Hofmeyr e34161832d ctx cleanup: use non-NULL talloc ctx for osmo_init_logging2()
Fix various sanitizer complaints about memory leaks using a sanitizer build
with gcc (Debian 7.3.0-12) 7.3.0.

Also fix deprecation warnings on osmo_init_logging().

Depends: I216837780e9405fdaec8059c63d10699c695b360 (libosmocore)
Change-Id: I970c6f8a0e36a8b63e42349dbc92baff649e5cef
2018-03-28 19:24:34 +02:00
Harald Welte 3561bd4897 introduce an osmo_fsm for gsm_subscriber_connection
In the current implementation of osmo-bsc, the subscriber connection is
not handled (very) statefully. However, there is some state keeping in the
code that handles the mgcp connection, but there are still to much loose ends
which allow odd situations to happen, which then lead severe error situations
(see also closes tags at the end) This commit adds a number of improvements
to fix those problems.

- Use an osmo-fsm to control the gsm_subscriber_connection state and
  make sure that certain operations can only take place at certain states
  (e.g let connection oriented SCCP traffic only pass when an SCCP connection
  actually exists.

  Remove the old osmo_bsc_mgcp.c code. Use the recently developed MGCP client
  FSM to handle the MGCP connections.

  Also make sure that stuff that already works does not break. This in
  particular refers to the internal handover capability and the respective
  unit-tests.

  See also OS#2823, OS#2768 and OS#2898

- Fix logic to permit assignment to a signalling channel. (OS#2762)

- Introduce T993210 to release lchan + subscr_conn if MSC fails to respond

  The GSM specs don't have an explicit timer for this, so let's introdcue
  a custom timer (hence starting with 99).

  This timeout catches the following situation:
  * we send a SCCP CR with COMPL_L3_INFO from the MS to the MSC,
  * the MSC doesn't respond (e.g. SCCP routing failure, program down, ...)

  The MS is supposed to timeout with T3210, 3220 or 3230.  But the BSC
  shouldn't trust the MS but have some timer on its own.

  SCCP would have a timer T(conn est), but that one is specified to be
  1-2min and hence rather long.

  See also: OS#2775

- Terminate bsc_subscr_conn_fsm on SCCP N-DISC.ind from MSC

  If the MSC is disconnecting the SCCP channel, we must terminate the FSM
  which in turn will release all lchan's and other state.

  This makes TC_chan_rel_hard_rlsd pass, see also OS#2731

  As a side-effect, this fixes TC_chan_act_ack_est_ind_refused(),
  where the MSC is answering with CREF to our CR/COMPL_L3.

- Release subscriber connection on RLL RELEASE IND of SAPI0 on main DCCH

  The subscriber connection isn't really useful for anything after the
  SAPI0 main signalling link has been released.  We could try to
  re-establish, but our best option is probably simply releasing the
  subscriber_conn and anything related to it.

  This will make TC_chan_rel_rll_rel_ind pass, see also OS#2730

This commit has been tested using the BSC_Tests TTCN3 testsuit and the
following tests were passed:

TC_chan_act_noreply
TC_chan_act_ack_noest
TC_chan_act_ack_est_ind_noreply
TC_chan_act_ack_est_ind_refused
TC_chan_act_nack
TC_chan_exhaustion
TC_ctrl
TC_chan_rel_conn_fail
TC_chan_rel_hard_clear
TC_chan_rel_hard_rlsd
TC_chan_rel_a_reset
TC_rll_est_ind_inact_lchan
TC_rll_est_ind_inval_sapi1
TC_rll_est_ind_inval_sapi3
TC_rll_est_ind_inval_sacch
TC_assignment_cic_only
TC_assignment_csd
TC_assignment_ctm
TC_assignment_fr_a5_0
TC_assignment_fr_a5_1_codec_missing
TC_assignment_fr_a5_1
TC_assignment_fr_a5_3
TC_assignment_fr_a5_4
TC_paging_imsi_nochan
TC_paging_tmsi_nochan
TC_paging_tmsi_any
TC_paging_tmsi_sdcch
TC_paging_tmsi_tch_f
TC_paging_tmsi_tch_hf
TC_paging_imsi_nochan_cgi
TC_paging_imsi_nochan_lac_ci
TC_paging_imsi_nochan_ci
TC_paging_imsi_nochan_lai
TC_paging_imsi_nochan_lac
TC_paging_imsi_nochan_all
TC_paging_imsi_nochan_plmn_lac_rnc
TC_paging_imsi_nochan_rnc
TC_paging_imsi_nochan_lac_rnc
TC_paging_imsi_nochan_lacs
TC_paging_imsi_nochan_lacs_empty
TC_paging_imsi_a_reset
TC_paging_counter
TC_rsl_drop_counter
TC_classmark
TC_unsol_ass_fail
TC_unsol_ass_compl
TC_unsol_ho_fail
TC_err_82_short_msg
TC_ho_int

Authors:
Harald Welte <laforge@gnumonks.org>
Philipp Maier <pmaier@sysmocom.de>
Neels Hofmeyr <neels@hofmeyr.de>

Closes: OS#2730
Closes: OS#2731
Closes: OS#2762
Closes: OS#2768
Closes: OS#2775
Closes: OS#2823
Closes: OS#2898
Closes: OS#2936
Change-Id: I68286d26e2014048b054f39ef29c35fef420cc97
2018-03-16 18:49:47 +00:00
Neels Hofmeyr 909e972787 HO: Implement load based handover, as handover_decision_2.c
Change-Id: Ie597eae82722baf32546331e443dd9d94f1f25e6
2018-02-19 17:11:47 +01:00
Harald Welte 86a8031e9c logging: Remove obsolete log categories
About half of our log categories/subsystems were inherited from
OsmoNITB, and are no longer used but may confuse the user.

Change-Id: I8b39429f71c0faefdf8158a82093cfb19f44809e
2018-02-19 10:47:50 +01:00
Neels Hofmeyr cc6240aeb2 libcommon: eliminate talloc_ctx.c
Interestingly enough, talloc_ctx_init() actually had not a single caller.

While dropping it, see to it that the few contexts that are actually used in
osmo-bsc.git are indeed initialized in all the main scopes.

Also initialize two void* ctxts as NULL explicitly, to allocate under the NULL
context in case some main scope forgets to branch it off another root context.
(That's bsc, fle and paging, all others actually come in from other libraries.)

Change-Id: I344a3d07e146999e154824837ed95db2b9879356
2018-02-14 12:15:40 +01:00
Neels Hofmeyr 7997bf4bed libcommon: eliminate debug.c
Provide concise log categories for each main scope.

Move the complete log categories 1:1 to osmo_bsc_main.c.

In bsc_nat.c, omit obviously unused log categories.

In tests, omit almost all log categories, except for those explicitly tested as
the expected output.

Note: should any logging occur for a log category that is omitted by accident,
such will end up being logged as DLGLOBAL, so it will show up and we can fix
it, and it will not get lost silently.

Change-Id: Ib524e49ec211662e0dfde8161495a72aa8ad76cf
2018-02-14 12:15:40 +01:00
Neels Hofmeyr ec1bb16eef libcommon: eliminate common_vty.c
Move bsc_vty_go_parent() to osmo_bsc_main.c and bsc_nat.c, and drop those nodes
that aren't used in the respective main scope.

Change-Id: I22ebb76742e9c5ab9dd608ac089a5c558aceeb36
2018-02-14 12:15:13 +01:00
Neels Hofmeyr e161bca800 libcommon: eliminate bsc_version.c
Move the copyright string into osmo_bsc_main.c. No other users of it exist.

Change-Id: I7f48924f484e4e4b98be4ca8bee253e6ea9c0576
2018-02-14 11:27:53 +01:00
Harald Welte 2f4f4b8604 osmo-bsc: Add talloc context introspection via VTY
This requires libosmocore with Change-Id
I43fc42880b22294d83c565ae600ac65e4f38b30d or later.

Change-Id: I1245b6818eb54f5c0c8adddcd3a01ecc7363fb42
2018-02-14 00:56:07 +00:00
Neels Hofmeyr c561515ae0 HO: enable handover by initializing at startup; rename init function
Change-Id: I224884c84895ebf6c8cf498c16616214cb2b5779
2018-01-19 16:03:16 +01:00
Neels Hofmeyr 9af36d7844 osmo_bsc_mgcp: cosmetic: introduce mgcp_init(), soak up fsm init
A subsequent patch will add registration of a signal; cosmetically prepare by
creating a common mgcp_init() function. It makes sense for the FSM registration
to move to it.

Change-Id: I510e1081171706eb3d9fb2db50a9aa4f768929b5
2018-01-19 16:03:15 +01:00
Harald Welte e94d7d1bdf remove libosmo-sccp dependency for osmo-bsc
libosmo-sccp is the old sccp-lite-focused SCCP implementation that we
used before libosmo-sigtran was created.  The new osmo-bsc in this
repository is using libosmo-sigtran and shouldn't be using parts of
libosmo-sccp anymore.

We only keep it around in configure.ac and Makefile.am for osmo-bsc_nat,
which is not even built in this repository anymore (or 'again yet'?)

Change-Id: I8f274be7d196cd7a5b1ec9ada949130fb06e984d
2017-12-19 17:53:14 +00:00
Harald Welte d9956d91ba Remove dead code left over from NITB split
There still is a lot of dead code that we inherited from the NITB
days, let's remove more of it.

libtrau will be re-introduced as part of osmo-mgw later.

Change-Id: I8e0af56a158f25a4f1384d667c03eb20e72df5b8
2017-12-19 17:53:13 +00:00
Philipp Maier 39c609b7c9 mgcp: use osmo-mgw to switch RTP streams
osmo-bsc currently negotiates the RTP stream directly with the
BTS and reports back the RTP IP/Port on the BTS. This works fine
for a single BTS, but for Handover the port/ip pointing to the
MSC side must not change, so an entity in between the BTSs and
the MSC is required.

Integrate the mgcp-client and use osmo-mgw to switch the RTP
streams.

Depends: osmo-mgw Ib5fcc72775bf72b489ff79ade36fb345d8d20736
Depends: osmo-mgw I44b338b09de45e1675cedf9737fa72dde72e979a
Depends: osmo-mgw I29c5e2fb972896faeb771ba040f015592487fcbe

Change-Id: Ia2882b7ca31a3219c676986e85045fa08a425d7a
2017-11-07 20:57:51 +00:00
Harald Welte 7b1d59c3c4 osmo-bsc: Initialize logging before initializing rate_ctr
The library code for rate counter initialization, which is called
from the descendants of bsc_network_alloc() might already want to
log something (particularly after Change-Id
Ifc6ac824f5dae9a848bb4a5d067c64a69eb40b56 in libosmocore), so the
logging framework must be initialized before.

Change-Id: I1e893c97e023e63489fe8c46539b5e507d3cec8f
2017-10-24 18:23:36 +02:00
Neels Hofmeyr c01647914b move include/openbsc to include/osmocom/bsc
Change-Id: I39e7b882caa98334636d19ccd104fd83d07d5055
2017-09-06 16:26:13 +02:00
Neels Hofmeyr 7b656884cf split off osmo-bsc: remove files, apply build
Change-Id: I64d84c52f6e38e98144eb9be8f0ab82e0e1f6cca
2017-08-30 14:11:25 +02:00
Philipp Maier 39f62bbcbf Implement AoIP, port to M3UA SIGTRAN (large addition and refactoring)
This was originally a long series of commits converging to the final result
seen in this patch. It does not make much sense to review the smaller steps'
trial and error, we need to review this entire change as a whole.

Implement AoIP in osmo-msc and osmo-bsc.

Change over to the new libosmo-sigtran API with support for proper
SCCP/M3UA/SCTP stacking, as mandated by 3GPP specifications for the IuCS and
IuPS interfaces.

From here on, a separate osmo-stp process is required for SCCP routing between
OsmoBSC / OsmoHNBGW <-> OsmoMSC / OsmoSGSN

jenkins.sh: build from libosmo-sccp and osmo-iuh master branches now for new
M3UA SIGTRAN.

Patch-by: pmaier, nhofmeyr, laforge
Change-Id: I5ae4e05ee7c57cad341ea5e86af37c1f6b0ffa77
2017-08-30 14:09:31 +02:00
Harald Welte 8f4a7c14af Treat SIGTERM just like SIGINT in our programs
When somebody kills the process, it's best to handle the signal
and to use the opportunity for some cleanup.  We always did this
in the NITB on SIGINT, but never on SIGTERM. Let's change it.

Change-Id: Iea6804325a6575ceab5edfd28dd20249462f143b
2017-08-27 03:52:47 +02:00
Neels Hofmeyr 218e4b4aa0 move openbsc/* to repos root
This is the first step in creating this repository from the legacy openbsc.git.

Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.

Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7
2017-08-27 03:52:43 +02:00