The ho_fail() macro includes a newline, so the callers should not add
one. Fix these cases where the extra '\n' fragments the logged message.
Related: SYS#5839
Change-Id: Ifdbce98be70c1aa127ae008d7a77b9795fd250d3
So far we completely ignore the codec list from the MSC in Handover
Request messages. This leads to error messages in subsequent handovers
because there is no Codec List stored on the conn:
DHODEC ERROR handover_decision_2.c:390 [...] No Speech Codec List present, accepting all codecs
Besides the error log, in hodec2 we may subsequently take bogus or
unexpected codec decisions, ignoring the MSC's choice of codecs, or in
the worst case picking an unsupported codec.
This also has implications on what type of lchan we choose for handover
target in hodec2: say, if no half rate codec is supported as per the
MSC's request, we normally avoid handover to a TCH/H, etc.
Intra-BSC HO after an Inter-BSC incoming HO is the only case where this
problem occurs, in every other scenario there is an Assignment Request
from the MSC, from which we properly store the MSC's codec list.
3GPP TS 48.008 does indicate that on AoIP this codec list shall be
included. So reject HO Request with missing Codec List, as we already do
for Assignment Request on AoIP.
This makes TTCN3 BSC_Tests for inter-BSC incoming HO fail, because our
tests so far omit the Codec List (MSC Preferred) on AoIP. The related
fix of the tests is If06de9c9b43d79f749447a4e2a340176eef75c79.
Related: SYS#5839
Depends: If06de9c9b43d79f749447a4e2a340176eef75c79 (osmo-ttcn3-hacks)
Change-Id: I117cc29d6d11db77d160de654f43f5993db6ee21
During inter-BSC incoming handover, there is no previous lchan to be
switched, so this event always comes in the READY state of
lchan_rtp_fsm. No need to complain about that and confuse log readers.
Related: SYS#5864
Change-Id: I96fd53b8c8da621a40bd65f85070eabd030cc875
"inter-BSC MT" was the terminology of an early development stage of
inter-BSC handover, code review requested "incoming" instead. This one
was missed when applying code review.
Same in a code comment.
Related: SYS#5864
Change-Id: I1ca810542e89980ffda11876fd30626467e452d1
Teach osmo-bsc to handle empty N-Connect. So far we were always
expecting user data in an SCCP N-Connect from an MSC. However, it is
perfectly valid for an initial BSSMAP request to follow later.
This is relevant for:
- Handover Request (incoming inter-BSC handover)
- Perform Location Request (query physical location of the MS)
Add state WAIT_INITIAL_USER_DATA with new timeout net X25. Always enter
this state so that we don't have two separate code paths for handling
initial user data.
Related: SYS#5864
Change-Id: I535c791fa01e99a2226392eb05f676ba6c3cc16e
Also increment message counter for the case that a Perform Location
Request came in the initial SCCP N-Connect message.
Related: SYS#5864
Change-Id: I3f78ce73eb16fdff1f19359963405b2235000fc4
Skip the BSSMAP Clear and SCCP RLSD parts and immediately deallocate the
gscon when there is no SCCP connection present. Before this patch, such
conn would stick around for a minute before a timeout deallocates it.
Related: OS#5337
Change-Id: I8c8537acf6b47b121903197608636c43ae601a57
Properly implement the separate conn release stages in separate FSM
states:
x) sent Clear Request, wait for a Clear Command from the MSC.
Timeout after a configurable 60s.
y) after a Clear Command and sending a Clear Complete, wait for the SCCP
RLSD. Timeout after a configurable 60s.
z) terminate after the RLSD is received / after timeout.
handover_test.c needs a little tweak to make the MGCP release work with
its fake MGCP client, because cleanup now ensures to invoke
gscon_forget_mgw_endpoint() in all cases.
Related: I680ec4ed866aa5f0b1ff29e7e98322615cfb288d (osmo-ttcn3-hacks)
Related: OS#5337
Change-Id: Ie975117d37f38ba853589dc7f8d3e94f8f9586b2
The way the ST_CLEARING is entered before this patch has various
symptoms of how I / we used osmo_fsm when we were still FSM amateurs in
Osmocom. Patch that up:
- In gscon_bssmap_clear(), ask for a state transition to ST_CLEARING
first. Go ahead only if it is allowed.
- move the Clear Request messaging to ST_CLEARING's onenter function.
- Fix the timeout behavior: by using conn_fsm_state_chg(), use the
actual proper X4 timer value for ST_CLEARING from VTY configuration
instead of hardcoded magic numbers.
Related: OS#5337
Change-Id: I234b2a754d0c98031056981823cdbc187e977741
Allow returning a context sensitive cause instead of a hardcoded one in
gscon pre_term().
Also, the conn->cause is needed to move message dispatch to an "onenter"
function in patch I234b2a754d0c98031056981823cdbc187e977741. I Split
this part off as a separate patch for better readability.
Related: OS#5337
Change-Id: Ib6432746040899129d1d73ae8dc59add2d88a915
During specific release scenarios, it became clear that an lchan still
pointed at a conn even after it had been deallocated. That was due to
setting conn->lchan = NULL but not lchan->conn = NULL. Fix that.
Do lchan_forget_conn() first, because during gscon_forget_lchan() we may
enter the gscon clearing dance, which in case of no SCCP conn being
present will soon / should immediately deallocate the conn.
Related: OS#5337
Related: I8c8537acf6b47b121903197608636c43ae601a57 (osmo-bsc)
Change-Id: Idbfe4672233ba8105eff5ba77ee07fd871358255
According to 3GPP TS 44.018, section 10.5.2.1b.2, only ARFCN values
in range 1..124 can be encoded using the 'bit map 0' format. Before
this patch, ARFCN values belonging to E-GSM band (0, 975..1023) were
ignored in bitvec2freq_list(), and thus not present in the resulting
Cell Channel Description IE.
Change-Id: I17739e6845cd84e2a81bc406dd532541f7c52cb6
Related: SYS#5854
This commit demonstrates what happens when a cell has channels in
both P-GSM and E-GSM bands (case 'c'). As can be seen from:
Case a) only the BCCH carrier: 10
Case b) more carriers from P-GSM band: 1 3 10 64 99 124
Case c) more carriers from E-GSM band: 1 3 10 64 99 124
in both cases 'b' and 'c' we have the same set of ARFCNs. Carriers
from the E-GSM band are not present at all. This is wrong and will
be fixed in the follow up change(s).
Change-Id: Ied0519c70501f105673a9b36657101063d275058
Related: SYS#5854
As the comment above the fix suggest, the encoding is in 10ms units.
osmo-bts is also doing the proper:
"""
uint8_t t3105 = *TLVP_VAL(&tp, NM_ATT_BTS_AIR_TIMER);
bts->t3105_ms = t3105 * 10;
"""
Related: SYS#5838
Change-Id: Ie190514ee35d1ca81b70e9180bf7393b973d3504
(cherry picked from commit 8f1597135d)
In the field we saw Handover Requests without any Chosen Encryption
Algorithm IE, and osmo-bsc completely failed on those. This made me
understand my mistake from when I wrote this handover code.
So far, from a BSSMAP Handover Request, we (I) used only the Chosen
Encryption Algorithm IE to pick the encryption to use on the target
lchan. That is very wrong.
Instead, figure out the intersection of permitted algorithms MSC & BSC,
and pick the best of those. Which means, actually, completely ignore the
Chosen Encryption Algorithm IE.
In the message, the permitted algorithms are passed as a bitmask. The
current code using gsm0808_dec_encrypt_info() passes this on as an
array. In order to select_best_cipher(), I could convert that array back
to a bitmask. Instead pass the bitmask on from message decoding
alongside the struct gsm0808_encrypt_info in req->ei_as_bitmask.
In handover_end(), change the condition so that we can also pass
HO_RESULT_FAIL_RR_HO_FAIL to emit a Handover Failure.
Related: SYS#5839
Change-Id: Iffedc981b60d309ed2e5decd5efedee07a757b53
The naming confused me so that I wrote buggy code again. Hopefully this
clarifies which representations the code paths are using.
In the macro code, highlight the error case of n <= -1 explicitly.
Also add ALG_A5_NR_TO_PERM_ALG_BITS. I need the 1<<n case in an
upcoming patch.
Related: SYS#5839
Change-Id: I7557ae97764bba09c906748a18e9031dfb362611
This patch imposes no logical change in the code on itself, but makes
sure people compiling osmo-bsc uses an old enough libosmocore
implementing Cell Identifier SAI. This is important since adding the SAI
ID (CELL_IDENT_SAI) displaced CELL_IDENT_WHOLE_GLOBAL_PS to a new
number outside of the 3GPP range for cell IDS (4 bits, this way we
garantee we won't have the same problem again).
This means there was an ABI breakage (see Depends below).
As a result, using an osmo-bsc compiled against an older libosmocore
, and then using at runtime against a newer version of libosmocore, will
most probably provoke some RIM features to not work properly, since
libosmocore will handle CGI-PS cell ids sent by osmo-bsc as SAI ones,
and most probably do wrong comparisons when matching (they only match up
to LAI included).
ABI break analysis:
osmo-bsc uses CELL_IDENT_WHOLE_GLOBAL_PS in:
* gsm0808_dec_cell_id_list2() -> this is called on stuff received from the
network, so it's actually fine handling it
correctly as CELL_IDENT_UTRAN_SAI instead
of CGI_PS.
* gsm0808_cell_id_list_add
same_cell_id_list_entries
gsm0808_enc_cell_id_list2
cell_id_to_cgi-> On old osmo-bsc, When
CELL_IDENT_WHOLE_GLOBAL_PS is passed
to be encoded as CGI, RAC byte is
taken for encoding instead of 2nd CI byte.
* gsm0808_cell_ids_match
gsm0808_cell_id_u_match
cell_id_to_cgi -> If CELL_IDENT_WHOLE_GLOBAL_PS as 0x11
(CELL_IDENT_UTRAN_SAI), 1 byte offset when
comparing (1 byte of RAC is taken converting to
CGI instead of the 2nd byte of CI). That means
match would be wrong if 2nd byte of CI differs.
Related: SYS#5838
Depends: libosmocore.git Change-Id Id25e563febdb7640174540136225f399515a0089
Change-Id: I70972efffefd57fd36332fab539683696c32f4a5
The timer (T4) that controls the re-sending of the BSSMAP RESET can not
be changed via the VTY, althrough it is defined via a tdef struct. Lets
add a description along with default values to make it configurable via
the VTY.
Change-Id: I1fb5699220ab8a643a168567a89c6f381fe433a7
Related: SYS#5796
The checks that make sure that an ARFCN falls in the correct range do
not return with -EINVAL as they should, instead nothing happens. (Only
the check for GSM1800 is corrct)
Change-Id: Iddadafe3fbc47e2f980d8e4ab4f320998cb454ff
Related: SYS#5369
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
At the moment the BTS configuration is checked, but the check does not
have much consequence other than that some initialization that is not
executed. The BTS will go into the OML bootstrap phase anyway and most
likely fail at some later point due to the invalid configuration. To
reduce noise and unexpected behaviour of the BTS lets make sure that the
OML boostrap phase can only proceed when the BSC conciders the
configuration as valid.
Change-Id: I42c1c26a9b800600787b1266a871f95f2114c26e
Related: SYS#5369
The manual lacks an example on how to set up an E1 connected BTS.
Especially the relation between trunk number and E1 line number is not
obvious.
Change-Id: I02f5d4fe059e5cc9c3ffc2e3636d812532c09239
Related: OS#5308
Counting the Assignment success after osmo_fsm_inst_term() meant that we
were counting a cleared out channel mode, which always yielded
signalling mode.
Count the Assignment success *before* terminating, so that we correctly
count the successful assignment as speech mode.
Related: SYS#4878
Related: Icb1386ec2ccd70eb3c026301b9b08ad7177278f7 (osmo-ttcn3-hacks)
Change-Id: Ie9fcd1e86f27ecb2f11e2e8813faac365cb470b8
Similar to paging:attempted, count paging:expired not only per BTS, but
also for the whole BSC. Add active_paging_requests to struct bsc_subscr,
to increase the counter only once if paging expires, and not once per
BTS where paging expired.
Related: SYS#4878
Change-Id: I9c118e7e3d61ed8c9f1951111255b196905eba4d
osmo-trx-uhd with a B200 has proven to provide bad (lower than usually
considered good) C/I values due to high noise (even with band filters in
place). Hence, default thresholds (gathered from literature on the topic)
are too high and end up in bad algorithm output decisions.
Furthermore, most users of Osmocom don't use it in densely populated
areas, hence RXLEV based algorithm used when C/I based one is disabled
is good enough.
Let's disable C/I based one by default, and let advanced users which
specific needs to enable and confiure thresholds specifically for their
needs (hardware, cell surrounding conditions, etc.).
Related: SYS#4917
Change-Id: If1a73c60695379bcfcd0f44c6ec6dd659563e279
abis_nm locally declares its own struct for the ipaccess firmware
header, even though libosmocore defines it as well. Lets use the
definition from libosmocore.
Change-Id: I69cb45fc40bd20ea2533cc8cd6a68363b59cc408
The function generate_ma_for_bts() is called when the OML TEI comes up.
In the same code path boostrap_bts() is called as well. It would be more
logical to call generate_ma_for_bts() from boostrap_bts() since it is
also part of the bootstrapping process.
Change-Id: Ib2ed5b1eac3701cfb3a3e8dd478488ba5404d1fd
Related: SYS#5369
At the moment check_bts and bootstrap_bts is called only once on startup.
When a new BTS is set up during runtime bootstrap_bts, nor check_bts is
called. This means that some parameters of the BTS stay uninitalized
until osmo-bsc is restarted. Lets rather call check_bts() and then
bootstrap_bts() when the OML TEI of the BTS comes up.
Change-Id: Ie599f809623efd6ea4ab3f39294195fc1ef84b85
Related: SYS#5369
Neels Hofmeyr
Neels Hofmeyr
Vadim Yanitskiy
Pau Espin
Philipp Maier
Oliver Smith