Commit Graph

341 Commits

Author SHA1 Message Date
Pau Espin 9688dc9aca bts: Add new stats to detect TBF allocation failure reasons
This is specially useful to detect for instance if a cell is handling
too many users, ending up in TFI or USF exhaustions. This information
can be later in the future used to tune TBF allocation algorithm behavior
(either manually/statially through config file, or
automatically/dynamically in code based on some thresholds).

Related: OS#5042
Change-Id: I5402e937ff8d800684655e500ef8e5c867141dc3
2021-03-01 13:18:36 +01:00
Pau Espin 4e1c9adb67 bts: Count TBF TS allocation failure
Related: OS#2282
Change-Id: I0696bf77364bd31b96c00614a58ce66809683d1c
2021-02-25 17:49:59 +01:00
Pau Espin Pedrol fe8de457ac Use ALPHA value received in SI13 from PCUIF
The old VTY command is marked as deprecated and still overrides the use
in case it's used.

Related: SYS#5358
Depends: libosmocore.git Change-Id I74fb0a3afc1ac4aadbfc609b882d929401f790eb
Depends: osmo-bsc.git Change-Id I8b97ea11bad5fe05f2f634945b5703ee9abde81d
Change-Id: I46f2a955b157a409055fca7fb917dc4f75482426
2021-02-22 12:29:12 +00:00
Pau Espin c0a250d17d Introduce NACC support
A new nacc_fsm is introduced per MS object, with its partner priv
structure struct nacc_fsm_ctx, which exists and is available in the MS
object only during the duration of the NACC procedure.

The NACC context is created on an MS whenever a Pkt Cell Change
Notification is received on Uplink RLCMAC, which asks for neighbor
information of a given ARFCN+BSIC.

First, the target ARFCN+BSIC needs to be translated into a CGI-PS
(RAC+CI) address. That's done by asking the BSC through the Neighbour
Resolution Service available in osmo-bsc using the CTRL interface.

Once the CGI-PS of the target cell is known, PCU starts a RIM RAN-INFO
request against the SGSN (which will route the request as needed), and
wait for a response containing the SI bits from the target cell.

After the SI are received, the scheduler is instructed to eventually
poll a TBF for the MS originating the CCN, so that we can send the SI
encapsulated into multiple Packet Neighbor Cell Data messages on the
downlink.

One all the SI bits are sent, the scheduler is instructed to send a
Packet Cell Change Continue message.

Once the message above has been sent, the FSM autodestroys itself.

Caches are also introduced in this patch which allows for re-using
recently known translations ARFCN+BSIC -> CGI-PS and CGI-PS -> SI_INFO
respectively.

Change-Id: Id35f40d05f3e081f32fddbf1fa34cb338db452ca
2021-01-29 12:59:30 +01:00
Pau Espin d1049dc8cc Allow multiple bts objects in PCU
This patch doesn't really tests whether osmo-pcu can work on a multi-bts
environment, but it prepares the data structures to be able to do so at
any later point in time.

Change-Id: I6b10913f46c19d438c4e250a436a7446694b725a
2021-01-20 12:36:21 +01:00
Pau Espin 906aafc9e2 Move tbf::free_all static methods to proper object files
Move each method to the object on which they operate, be it a trx or a
pdch ts.

Change-Id: Ida715cbf384431d37b2b192fbd7882957c93a4d1
2021-01-19 16:28:13 +01:00
Pau Espin 289f90048b bts: combine bts_{init,cleanup} into consturctor/destructor methods
The bts_init/cleanup functions were kept during the C and C++ structure
merge process to make the patch simpler. It's not needed anymore,
let's move all the destructor logic into one function and keep that
together.

Change-Id: I73a9457d5c92f62261561ef6afe392953576aec4
2021-01-19 16:28:13 +01:00
Pau Espin a45aafd39c Get rid of bts singletons
There's no BTS single global object anymore, get rid of those APIs. Move
users to use "pcu->bts", which will evolve to a linked list in the
future.

Change-Id: I9cf762b0d3cb9e2cc3582727e07fa82c8e183ec5
2021-01-19 16:28:13 +01:00
Pau Espin 2182e627cd Unify BTS into a C usable structure
Previous work on BTS class started to get stuff out of the C++ struct
 into a C struct (BTS -> struct gprs_glcmac_bts) so that some parts of
it were accessible from C code. Doing so, however, ended up being messy
too, since all code needs to be switching from one object to another,
which actually refer to the same logical component.

Let's instead rejoin the structures and make sure the struct is
accessible and usable from both C and C++ code by rewriting all methods
to be C compatible and converting 3 allocated suboject as pointers.
This way BTS can internally still use those C++ objects while providing
a clean APi to both C and C++ code.

Change-Id: I7d12c896c5ded659ca9d3bff4cf3a3fc857db9dd
2021-01-19 16:28:10 +01:00
Pau Espin 793583ea21 Fix configuration mess of initial_cs/mcs between PCUIF and VTY
Both values (optionally) set (forced) by VTY and the values received
from PCUIF were stored in the same variable, meaning that for instance
the PCUIF values wouldn't really be used if someone applied eg "no cs"
during runtime.

This commit does something similar to what was already done for the
max_(m)cs fields. We store PCUIF values in one place and VTY ones in
another place, and then trigger a bts object internal process to find
out exactly which initial CS should it be using.

Change-Id: I80a6ba401f9c0c85bdf6e0cc99a9d2008d31e1b0
2021-01-18 11:57:14 +01:00
Pau Espin f473ec9d7a Move llc_* fields from BTS to PCU
Change-Id: Iffb916e53fdf99164ad07cd19e4b35a64136307e
2021-01-18 11:54:57 +01:00
Pau Espin 519d071131 Move ws_* fields from BTS to PCU
Change-Id: I997bc52f0d924c8f2a0b1d6cf23af98828ad4258
2021-01-18 11:54:57 +01:00
Pau Espin e891222920 Move fc_* fields from BTS to PCU
Change-Id: I816d49e732d0fc7a3c9aa1f0e9a83b83d25e6a32
2021-01-18 11:54:57 +01:00
Pau Espin 113fb419ec Move ns_dialect field from BTS to PCU
Change-Id: Iffb22b776b91f93d6d2a7ccfa47deeecc22c33f0
2021-01-18 11:54:57 +01:00
Pau Espin 54b159aab9 Move (m)cs_lqual_ranges fields from BTS to PCU
Change-Id: I39e2fc7e229851610d797c594d84902af6079411
2021-01-18 11:54:57 +01:00
Pau Espin ad79b857cd Move cs_downgrade_threshold field from BTS to PCU
Change-Id: I3e1c65eb3cccff565d5d84588bdce93a47909a0f
2021-01-18 11:54:57 +01:00
Pau Espin e8dcf64881 Move cs_adj* fields from BTS to PCU
Change-Id: I2b00a83279dccd4feeeeb95e34878c4405e7972c
2021-01-18 11:54:57 +01:00
Pau Espin 97296b299c Move dl_arq_type field from BTS to PCU
Change-Id: I0b82ab59edd58d60e5581c707dc49f58de0ba203
2021-01-18 11:54:53 +01:00
Pau Espin 05f9f59a67 Move dl_tbf_preemptive_retransmission field from BTS to PCU
Change-Id: I3ab32fcafe83f3ecb116a5b8a05f58f3fddc5451
2021-01-18 11:38:38 +01:00
Pau Espin a281495008 Move alpha,gamma fields from BTS to PCU
Change-Id: I2fdd9c8a7393157183fff64084bb10e2a3b1dc63
2021-01-18 11:38:38 +01:00
Pau Espin 03de898d19 Move force_two_phase field from BTS to PCU
Change-Id: I68a6e032f725cde87992b99f039c5280e912faf7
2021-01-18 10:37:05 +00:00
Pau Espin 924aaad4bc Move T_defs_pcu from BTS to PCU object
Change-Id: I0cac5c12dff2e90b52d00383a00b4b94a9603a0a
2021-01-18 10:37:05 +00:00
Pau Espin ac3fd12026 Split PCU global PCU object from BTS object
Currently the BTS object (and gprs_rlcmac_bts struct) are used to hold
both PCU global fields and BTS specific fields, all mangled together.
The BTS is even accessed in lots of places by means of a singleton.

This patch introduces a new struct gprs_pcu object aimed at holding all
global state, and several fields are already moved from BTS to it. The
new object can be accessed as global variable "the_pcu", reusing and
including an already exisitng "the_pcu" global variable only used for
bssgp related purposes so far.

This is only a first step towards having a complete split global pcu and
BTS, some fields are still kept in BTS and will be moved over follow-up
smaller patches in the future (since this patch is already quite big).
So far, the code still only supports one BTS, which can be accessed
using the_pcu->bts. In the future that field will be replaced with a
list, and the BTS singletons will be removed.

The cur_fn output changes in TbfTest are actually a side effect fix,
since the singleton main_bts() now points internally to the_pcu->bts,
hence the same we allocate and assign in the test. Beforehand, "the_bts"
was allocated in the stack while main_bts() still returned an unrelated
singleton BTS object instance.

Related: OS#4935
Change-Id: I88e3c6471b80245ce3798223f1a61190f14aa840
2021-01-18 10:37:05 +00:00
Vadim Yanitskiy eb70a4098f bts: fix uninitialized memaccess in BTS::send_gsmtap()
Change-Id: I7c5105c9e8a2c680dc8b24cc5e3bda6f7405a3ee
Fixes: CID#216511
2021-01-13 13:58:16 +01:00
Vadim Yanitskiy 55022ea1b1 bts: fix uninitialized memaccess in BTS::send_gsmtap_rach()
Unfortunately, RACH.ind on the PCU interface contains no Uplink
measurements: neiter RSSI nor C/I.  In order to avoid sending
garbage, let's zero-initialize 'struct pcu_l1_meas'.

Change-Id: I8c3210c428da17d23d798f3ef9df941ded6e162a
Fixes: CID#216512
2021-01-13 13:57:13 +01:00
Pau Espin Pedrol da971ee502 Convert GprsMS and helpers classes to C
As we integrate osmo-pcu more and more with libosmocore features, it
becomes really hard to use them since libosmocore relies heavily on C
specific compilation features, which are not available in old C++
compilers (such as designated initializers for complex types in FSMs).

GprsMs is right now a quite simple object since initial design of
osmo-pcu made it optional and most of the logic was placed and stored
duplicated in TBF objects. However, that's changing as we introduce more
features, with the GprsMS class getting more weight. Hence, let's move
it now to be a C struct in order to be able to easily use libosmocore
features there, such as FSMs.

Some helper classes which GprsMs uses are also mostly move to C since
they are mostly structs with methods, so there's no point in having
duplicated APIs for C++ and C for such simple cases.

For some more complex classes, like (ul_,dl_)tbf, C API bindings are
added where needed so that GprsMs can use functionalitites from that
class. Most of those APIs can be kept afterwards and drop the C++ ones
since they provide no benefit in general.

Change-Id: I0b50e3367aaad9dcada76da97b438e452c8b230c
2021-01-05 10:34:25 +00:00
Alexander Couzens 3db4789be8 gprs_ns2: set default dialect to ipaccess
The default pcu dialect is ipaccess. Keep it that way.

Fixes ttcn3 pcu testcases.

Change-Id: I426f507fb8863abd8995bc615dc6a6fa7ae69217
2020-12-16 21:39:07 +01:00
Pau Espin 022f9e56e5 Implement downgrade to DL MCS1-4 when USF for GPRS_only MS
In previous status, if USF for GPRS-only MS was selected, then EGPRS
TBFs were skipped and either a GPRS TBF was selected or a Dummy Block
was sent. That means the behavior was unfair towards EGPRS TBFs, because
sometimes they were skipped in favor of GPRS ones.
This patch imporves the situation in the above mentioned USF scenario, by
first, under specific conditions, allowing selection of an EGPRS TBF and
then forcing it to transmit in EGPRS-GMSK (MCS1-4) so that the
USF-targeted MS can still decode the USF, while at the same time
providing more fairness by allowing the EGPRS TBF to transmit data.

The specific conditions mentioned above are, mainly, related to the fact
that once a DL data block has been sent, and hence a BSN was assigned to
it, it cannot be retransmitted later using another MCS, since lower
MCS1-4 wouldn't be able to contain higher MCS RLC payload.

The set of conditions could be expanded in the future by also selecting
the EGPRS TBF if retransmition is required and the block to be
retransmitted was originally transmitted as MCS1-4.

Related: OS#4544
Change-Id: I9af23e175435fe9ae7b0e4119ad52fcd4707b9ca
2020-12-01 11:56:01 +00:00
Pau Espin e309d80dd4 Fix ctr reports: Remove ctr description from already removed counter
Recent commit removed the counter enum but forgot to remove the
description, so the descriptions were all shifted by 1 counter.

Fixes: 133fe4a852
Change-Id: I82ee9f36d60a1fd129ae3a864508fcd886e4bfef
2020-11-13 16:19:25 +01:00
Pau Espin 343ec9b9fd Take into account BTS supported (M)CS values when retrieving the maximum
Change-Id: I2d3a8bbae2f9887400ce56d2f8303ea30abaecfa
2020-11-04 21:39:42 +01:00
Pau Espin d87722d03c pcuif: Improve BTS-supported CS/MCS handling
Take into account the MCS values supported by the BTS. In osmo-bts,
in general all MCS are enabled if "mode egprs" is selected in BSC,
and none otherwise.

Change-Id: Ie8f0215ba17da1e545e98bec9325c02f1e8efaea
2020-11-04 21:39:42 +01:00
Pau Espin 46fd7a0316 Move BTS initial values inside bts.cpp
This way everytime any program or test initiates a BTS object, the
bts_data structure has the same values.

Change-Id: Iffd6eecb1f08bda0091f45e2ef7c9c63b42e10b3
2020-11-04 19:32:12 +00:00
Pau Espin 983bb7eb31 alloc_algo_b: Select TRX with least assigned TFIs during TBF alloc
Before this patch, it would always allocate all TBFs on the first TRX
until all TFIs were filled, then second, and so on. But it would
actually fail around 8th MS requesting an UL TBF because despite a TFI
was successfuly assigned, because all USFs were already exhausted for
that PDCH.

Related: OS#1775
Change-Id: Iccfc8acfbfdc258ed16cc5af01f12b376fe73b72
2020-10-29 11:34:17 +00:00
Harald Welte 0a369e560c bts.cpp: Increase constructor priority
It seems that some gcc versions do not consider the priority of
"C" __attribute__((constructor)) definitions in the same order as
they do C++ static initializers, which are called in the order in which
they appear in the compile unit (source file).

The problem has been observed at least in a
environment based on T2 SDE with GCC 6.3.0 and binutils 2.28.

Let's work around this by making sure the __attribute__((constructor))
function always gets the highest priority value permitted by gcc (101).

Closes: SYS#5093
Change-Id: I65de69a32ac929e6ddd4e58980027f9e76813153
2020-10-01 19:39:58 +02:00
Vadim Yanitskiy 1156776572 encoding: pass pdch slot directly to encoding functions
In order to be able to encode frequency hopping parameters, let's
pass a const pointer to 'gprs_rlcmac_pdch' (PDCH slot) directly,
instead of passing all related parameters separately.

Change-Id: I6bccad508f0fdccc4a763211008dd847a9111a8d
Related: SYS#4868, OS#4547
2020-08-24 10:53:08 +00:00
Neels Hofmeyr 59fc0bda6e paging: pass struct osmo_mobile_identity, not encoded IE bytes
In get_paging_mi(), before this, an encoded buffer of Mobile Identity bytes is
returned. Code paths following this repeatedly decode the Mobile Identity
bytes, e.g. for logging. Also, in get_paging_mi(), since the TMSI is read in
from a different encoding than a typical Mobile Identity IE, the TMSI was
manually encoded into a typical Mobile Identity IE. This is essentially a code
dup of osmo_mobile_identity_encode(). Stop this madness.

Instead, in get_paging_mi(), return a decoded struct osmo_mobile_identity. Code
paths after this use the struct osmo_mobile_identity directly without repeated
decoding.

At the point of finally needing an encoded Mobile Identity IE (in
Encoding::write_paging_request()), do a proper osmo_mobile_identity_encode().

Since this may return errors, add an rc check for the caller of
write_paging_request(), gprs_rlcmac_paging_request().

A side effect is stricter validation of the Mobile Identity passing through the
Paging code path. Before, invalid MI might have passed through unnoticed.

Change-Id: Iad845acb0096b75dc453105c9c16b2252879b4ca
2020-08-24 01:12:16 +00:00
Neels Hofmeyr 0052051c07 use new osmo_mobile_identity api (avoid deprecation)
Note: subsequent patch Iad845acb0096b75dc453105c9c16b2252879b4ca will change to
passing a struct osmo_mobile_identity in the Paging code path, instead of
passing the encoded IE data.

Change-Id: Ibb03b8e601160427944f434761ca59811d1fc12f
2020-08-21 16:40:14 +02:00
Vadim Yanitskiy eb1e0fa859 bts: cosmetic: use DUMMY_VEC for padding where possible
Change-Id: I725a7bd1b0c4d2b0d73f1b6d1f16543bf3d9d9fe
2020-07-18 20:33:49 +07:00
Vadim Yanitskiy 81b610ea2c bts: fix send_gsmtap_rach(): properly pack 11 bit RA
According to 3GPP TS 44.004, section 7.4a, two alternative RACH
block formats are specified: 8 bit (1 octet) and 11 bit. The
bit order is LSB (right to left), byte order is MSB.

In PCUIF RACH.ind structure (see gsm_pcu_if_rach_ind) we use
a field of type uint16_t to store RA values regardles of the
block format. Thus when packing it to bytes, we cannot just
cast uint16_t* to uint8_t*, we need to do some bit shifting.

Change-Id: I08a0a908f855b0d8a002df732e02781126d27dfb
2020-06-11 01:29:40 +07:00
Vadim Yanitskiy 07b6487c5a bts: add send_gsmtap_rach(), also send PTCCH/U over GSMTAP
Change-Id: I5cc4c3d2522215a31924121f83fcc2ac9ac6fe9c
2020-06-11 01:29:12 +07:00
Vadim Yanitskiy b90d34b3d1 BTS::parse_rach_ind(): properly handle EGPRS Packet Channel Request
Let's finally use the API we introduced in [1].

[1] I96df3352856933c9140177b2801a2c71f4134183

Change-Id: Ia15761c33c8048d35c7f7bc93dbea781dd0894b7
Related: OS#1548
2020-06-03 12:49:40 +00:00
Vadim Yanitskiy a0a0b7fb0e bts: refactor handling and parsing of RACH.ind
This patch is a set of tightly related changes:

  - group all RACH.ind parameters into struct 'rach_ind_params';
  - group Channel Request parameters into struct 'chan_req_params';
  - get rid of egprs_mslot_class_from_ra(), priority_from_ra(),
    and is_single_block(), introduce unified parse_rach_ind();
  - improve logging, get rid of redundant information.

This is needed for proper EGPRS Packet Channel Request handling.

Change-Id: I5fe7e0f51bf5c9eac073935cc4f4edd667c67c6e
Related: OS#1548
2020-06-03 12:49:40 +00:00
Pau Espin 0b0391ff66 gsmtap: Set signal level and SNR fields
lqual (containing C/I value) is passed instead of SNR, but let's have
that better than nothing.

Change-Id: Ibe9502d42c8bd1b984069e7fd805dde87ecbab0c
2020-05-20 14:20:56 +02:00
Pau Espin 2338e5318e bts: Drop specific functions to increase counters
It's super annoying seeing lots of functions being called everywhere
only to find out they are only incrementing a counter. Let's drop all
those functions and increment the counter so people looking at code
doesn't see dozens of code paths evyerwhere.

Most of the commit was generated by following sh snippet:
"""
 #!/bin/bash
grep -r -l ^CREATE_COUNT_INLINE . | xargs cat | grep "^CREATE_COUNT_INLINE("| tr -d ",;" | tr "()" " " | awk '{ print $2 " " $3 }' >/tmp/hello

while read -r func_name ctr_name
do
 #echo "$func_name -> $ctr_name"
files="$(grep -r -l "${func_name}()" .)"
for f in $files; do
echo "$f: $func_name -> $ctr_name";
sed -i "s#${func_name}()#do_rate_ctr_inc(${ctr_name})#g" $f
done;
done < /tmp/hello

grep -r -l "void do_rate_ctr_inc" | xargs sed -i "/void do_rate_ctr_inc(CTR/d"
grep -r -l "CREATE_COUNT_INLINE" | xargs sed -i "/^CREATE_COUNT_INLINE/d"
"""

Change-Id: I360e322a30edf639aefb3c0f0e4354d98c9035a3
2020-05-14 11:19:05 +00:00
Pau Espin 17402a5902 Expect ms object to exist before calling tbf_alloc_ul_tbf()
It's really non-sense from architectural point of view to pass an
optional pointer to the MS holding the TBF and creating it otherwise.
TBFs shouldn't be creating MS they belong too.

This simple change requiring so many code line changes really exhibits
how badly entangled the object relationship is.

Another commit will follow doing the same for dl tbf.

Change-Id: I010aa5877902816ae246e09ad5ad87946f96855c
2020-05-12 17:09:20 +00:00
Vadim Yanitskiy f094b46d1c fix egprs_mslot_class_from_ra(): multislot class may not be present
For more details, see 3GPP TS 44.060, table 11.2.5a.2.

Change-Id: Iba0466b29afd26cff317ed4fb6749f8a3079f16a
Signed-off-by: Vadim Yanitskiy <axilirator@gmail.com>
Related: OS#1548
2020-05-11 20:06:39 +00:00
Pau Espin e6bca376aa bts: Return uint8_t in egprs_mslot_class_from_ra()
MultislotClass is 5 bit long, so an uint8_t is enough.
In most places we are already storing multislot class as uint8_t.

Change-Id: I1dcaff9d69379453a0b794e5f36b820f5f78531f
2020-05-08 16:37:25 +02:00
Pau Espin 98eb03c391 bts: Fix Decoding EGPRS MultislotClass from 11-bit EGPRS PACKET CHANNEL REQUEST
In osmo-pcu datatructures, the variables holding multislot classes
simply contain an integer referring to the multislot class number,
instead of coding from 3GPP TS 44.060 Table 11.2.5.3 and Table
11.2.5a.3.

So coding Multislot class 3 is stored as 0x03 in osmo-pcu variables,
while in 3GPP TS 44.060 coding it's coded as 0x02 (N-1).
This allows us using value 0x00 to designate a "yet unknown (EGPRS) Multislot
class".
Hence, we need to add 1 to the decoded value to match our data
structures.

Change-Id: Id3b121272bb7e84c0542ae9b4ce09598c6054edd
2020-05-08 16:35:51 +02:00
Pau Espin 9ee90d2323 bts: Rename mslot_class_from_ra
This function is actually returning an EGPRS multislot class, so let's
update naming. The variable using the return value was already being
passed as egprs_ms_class to tbf_alloc_ul_tbf().

Change-Id: Idb51836c8c9dd4e865bf2cb0b0c24155662f2ae8
2020-05-08 16:34:50 +02:00
Pau Espin d7c3265223 Pass paging group instead of imsi where later is not needed
Change-Id: Id0663a81f439f2d0b893b0d34f85a6db1927ef8e
2020-01-06 10:26:46 +00:00
Pau Espin fbfab297ee Split identity_lv param into mi+mi_len
It's not really needed to have those together in some function calls,
and makes it more difficult to follow the code. Furthermore, new callers
not having content already aligned (len+value) will be using these
functions in forthcoming commits.

Change-Id: Ifb9d3997bfb74b35366c3d1bc51ce458f19abf16
2020-01-01 16:10:15 +00:00
Vadim Yanitskiy ffebd24456 PTCCH: properly handle RACH.ind for PCU_IF_SAPI_PTCCH
Change-Id: I482d60a46b9d253dfe0b16140eac9fea6420b30c
Related: OS#1545
2019-11-23 17:42:45 +07:00
Vadim Yanitskiy bd0dac3783 PTCCH: implement basic message codec and API
Change-Id: Id79e95aafdde4a71977c64385fce48b729a51ca9
Related: OS#1545
2019-11-17 02:35:18 +07:00
Pau Espin 1ec211f57f Log RACH Requests using GSMTAP
Change-Id: Ib686a49e8c630808c30bede5810cd65fc045954a
2019-09-30 20:15:54 +02:00
Pau Espin 9d1cdb1f69 Move out tbf subclasses from tbf.h to their own headers
It's a good start towards clearing current mess between parent and the 2
children classes.

Change-Id: Ibc22ea2e02609af7ee058b8bc15df2115d4c6f60
2019-09-25 17:50:06 +02:00
Pau Espin 2b5c629055 Use osmo_tdef to implement dl-tbf-idle-time
Change-Id: I5e4f0d2f90e643600b7752525d6c2830856c9d3b
2019-09-17 11:11:04 +02:00
Pau Espin 63700ead34 Use osmo_tdef to implement ms-idle-time
This commit would also remove the option from config_write_pcu() since
it's automatically filled in by osmo_tdef, but there was actually a bug
because that param was never printed when saving the config...

Change-Id: Id8e70b0f44ef2f7e20ecdb3fd8ca93ae2a05b9a3
2019-09-17 11:05:45 +02:00
Pau Espin 38cfa734f4 Use osmo_tdef to implement T3190
Change-Id: I0c767c526398d98ca47ef98fdaccfc23af11fb0d
2019-09-16 14:21:21 +00:00
Pau Espin 5211d9deca Use osmo_tdef for BSSGP T1 and T2
Change-Id: I477e5b702c8b956136d93fc1cee01991233e381f
2019-09-16 14:21:21 +00:00
Oliver Smith cfb6321b88 Forward ETWS Primary Notification to MS
Receive an Application Information Request from the BTS via PCU
interface. Construct a Packet Application Information message from it
(3GPP TS 44.060 11.2.47) and send it to all MS with active TBF.

The TTCN-3 test infrastructure to test this feature is not quite ready
yet, so I've added C unit tests instead.

Related: OS#4048
Change-Id: Ie35959f833f46bde5f2126314b6f96763f863b36
2019-09-14 15:28:43 +00:00
Pau Espin 5360ef5447 bts.cpp: Fix osmo_tdef initialization on older g++ compilers
Fixing errrors spotted:
bts.cpp:78:1: error: uninitialized const member 'osmo_tdef::T'
 };
 ^
bts.cpp:78:1: error: uninitialized const member 'osmo_tdef::default_val'
bts.cpp:78:1: error: uninitialized const member 'osmo_tdef::unit'
bts.cpp:84:1: error: uninitialized const member 'osmo_tdef::T'
 };
 ^
bts.cpp:84:1: error: uninitialized const member 'osmo_tdef::default_val'
bts.cpp:84:1: error: uninitialized const member 'osmo_tdef::unit'

Change-Id: I2dfecf22516f52cc19e0a0442e70dbc4dbc61336
2019-09-13 12:42:38 +02:00
Pau Espin 28f160e76c Introduce osmo_tdef infra and timer VTY commands
This will allow for configuration of some of the timers by the user,
and allow him to inspect current values being used.
It will be also useful for TTCN3 tests which may want to test some of
the timers without having to wait for lots of time.

Timers are splitted into 2 groups: BTS controlled ones and PCU controlled
ones. The BTS controlled ones are read-only by the user (hence no
"timer" VTY command is provided to change them).

TbfTest.err output changes due to timers being set up correctly as a
consequence of changes. Other application such as pcu_emu.cpp and
pcu_main.cpp had to previosuly set the initial values by hand (and did
so), but apparently TbfTest.c was missing that part, which is now fixed
for free.

Depends: libosmocore.git Id56a1226d724a374f04231df85fe5b49ffd2c43c
Change-Id: I5cfb9ef01706124be262d4536617b9edb4601dd5
2019-09-12 14:17:07 +02:00
Oliver Smith 45fdc44d68 tbf_dl: make preemptive retransmission optional
Since [1], OsmoPCU already starts to retransmit downlink blocks before
the MS has had a chance to receive them and/or send the related
acknowledgement in uplink. Make this optional with the new VTY option
"no dl-tbf-preemptive-retransmission".

[1] e25b5b91f6 ("tbf: Only create dummy frames if necessary")
Related: OS#2408
Change-Id: Id08aed513d4033aa0d4324c6ce07cbb2852f2f92
2019-09-11 06:16:29 +00:00
Eric Wild ab8b01effd ubsan: fix shift
Ubsan complains about shifts into the sign bit due to automatic int
promotion, so cast explicitly.

Change-Id: I6387c7313832f6c7c920e1016b74562b66d6b68e
Related: OS#4029
2019-07-24 19:28:38 +00:00
Thorsten Alteholz 8bb7904458 fix spelling errors detected by lintian
Change-Id: I381618eb55cc513cfa9c2e384c27cead0935c8bf
2019-07-17 10:56:19 +00:00
Alexander Couzens fba931bab6 bts.cpp: ensure left-shift operation does not exceed uint32_t
Found by Asan
Relates: OS#4029
Change-Id: I21640e40e689016d6fb80a8db4257b22e85b303b
2019-07-11 03:22:15 +00:00
Max d5ffeb5e63 Explicitly clean up BTS singleton
Add method to explicitly cleanup BTS singleton similar to GprsMsStorage
class and use it from main(). The destructor becomes trivial wrapper
around cleanup() method.

This prevents annoying SIGABRT on exit of OsmoPCU caused by
rate_ctr_group_free() being called after talloc_free() which removes the
context in which counter group is allocated.

Change-Id: I796d56a7de3f3a1f9d59708995c8e3e9b05a2747
2019-03-19 15:42:10 +00:00
Max fc8afc2f33 Clarify write_immediate_assignment() signature
* remove unused variable
* use bool for boolean types
* add clarification comments

Change-Id: I363445063e2d873d9194b2a5924b9e59b8b7ea53
2019-02-19 18:58:04 +01:00
Neels Hofmeyr 42f2d61ac9 use osmo_init_logging2() with proper talloc ctx
There is a duality of initialization: early_init() in bts.cpp wants to init
logging even before static instances get initialized. Make sure that
tall_pcu_ctx is initialized during early_init() as well. There is a build
context that does not seem to include bts.cpp (osmo-pcu-remote), so to be sure,
init tall_pcu_ctx as NULL and both in early_init() as well as pcu_main.cpp,
init both tall_pcu_ctx and logging if it is still NULL.

Change-Id: I2199b62d0270bd35dec2283e8f5b364b7c63915b
2018-04-01 16:57:42 +02:00
Max 6dc90b8c86 Move PDCH-related functions into separate files
The PDCH class and corresponding functions are rather self-contained and
independent from BTS implementation. Let's move them into separate file
to make bts.cpp more manageable. As additional benefit it allow us to
somewhat untangle all the different cross-dependent includes.

Change-Id: Ie05e25361e6741a81b024679f9675c98d4923683
Related: OS#1539
2018-02-19 17:41:24 +01:00
Max 1187a7719c Update header includes
Many files include unnecessary headers and don't include headers which
are actually used. Because of that combined with the fact that OsmoPCU
is a mixture of C and C++, it makes it hard to modularize code. Fix
this (using iwyu [1] tool):

* add missing headers
* remove unused headers

[1] https://include-what-you-use.org/

Related: OS#1539
Change-Id: I8c9f488a43b099c72b2d30d3245e7ba50872fc00
2018-02-19 08:43:46 +00:00
Max 4382e4e8fe Move paging generation into PDCH
Previously paging was prepared inside BTS function and than handed over
to PDCH function. Move the actual preparation into PDCH to better
decouple PDCH from BTS.

Related: OS#1539
Change-Id: I389fb16b6e54040770c21f88edbcb8e045636928
2018-02-19 08:43:33 +00:00
Max 137fd59bf4 RACH: improve single block detection
Replace unreadable if-else ladder in is_single_block() with regular
switch-case. This enables implementation of 11-bit RACH support in
follow-up patches.

Related: OS#1548
Change-Id: I9180478152f9341f11bb3dffe61671da683f24d8
2018-02-07 17:25:42 +01:00
Max 5d7f757e49 TBF: add helpers for assignment type handling
* add function to set/unset given assignment type
* log assignment type flag changes
* update tests output with additional logs

This enables us to carefully track the TBF assignment type transitions.

Change-Id: I3fe9d52472be8b7f257e8326b2f84e8e7d7bd1f4
Related: OS#1759
2018-02-03 15:05:29 +00:00
Max 69d585e148 TS alloc: print suggested TRX on allocation errors
If TS allocation fails due to unavailable TFI, print TRX which was
suggested to allocator. This simplifies allocator debugging but requires
cosmetic modifications to test output.

Change-Id: Icaf97d71d71985d52dc0bda448c26b19fe5645e7
Related: OS#2282
2018-01-31 11:21:27 +01:00
Max a76a7d0c6c Simplify TS alloc: adjust function signatures
* document used parameters and return values
* use consistent formatting
* constify function parameters where appropriate (adjusting parameter
  types if necessary)

Change-Id: I211b10b4da59c73d509b719346774515c761886a
Related: OS#2282
2018-01-26 12:57:05 +01:00
Max d000d80968 Simplify TS alloc: use defines for constants
* define and use constant for occupied TFI instead copying the same
  magic number all over the place
* use libosmocore's define for bit pretty-printer

Change-Id: I2699ceebf0cbec01652a02fa68ccc9e9419d0293
Related: OS#2282
2018-01-26 12:57:05 +01:00
Max 92b7a50605 Simplify TS alloc: fix allocation calls
Using the semantic patch below, adjust allocation-related calls to match
updated allocator signatures.

// spatch --c++ --dir src -I src --sp-file callfix.spatch --in-place --recursive-includes
// spatch --c++ --dir tests -I src --sp-file callfix.spatch --in-place --recursive-includes
@@ expression A, B, C, D, E; @@
tbf_alloc_ul_tbf(A, B, C, D, E,
(
- 1
+ true
|
- 0
+ false
)
 )
@@ expression A, B, C, D, E; @@
tbf_alloc_dl_tbf(A, B, C, D, E,
(
- 1
+ true
|
- 0
+ false
)
 )

Change-Id: I43c76cb49093b40eb854d324e898e821270053dc
Related: OS#2282
2018-01-26 12:55:59 +01:00
Max cac6b66638 TBF: make poll state internal
* add functions/macros for setting TBF's poll state
* add function for checking TBF's poll state

Change-Id: I6db1c4e7bd0a49aeb5e391afe371c36b96c6a702
Related: OS#1539
2018-01-24 11:06:55 +01:00
Max 0e5998087e TBF: make UL/DL state internal
* add functions/macros for setting TBF's UL/DL state
* add functions for checking TBF's UL/DL state
* move pre-free check into separate function

N. B: this should not be confused with TBF-UL or TBF-DL state.

Change-Id: Idcbf5775d17b1247f2ed01788f9b0788ce66e871
Related: OS#1539
2018-01-24 11:06:22 +01:00
Max 2399b1dbfc TBF: log source of state transitions
We use the same approach for osmo_fsm: when state transition happens,
it's not very useful to always log the transition function itself, it's
much more useful to see where the actual transition comes from.

Change-Id: I348ba89bdda2b44c7019e9c893c764ee08c80bec
Related: OS#1759
2018-01-17 15:47:32 +00:00
Max ea98b7d784 TBF: move window parameters to UL/DL level
The UL and DL TBF use different classes implementing window
management. Hence it's better to use it explicitly instead of using the
common window management superclass inside common TBF superclass. While
at it, also remove the direct access to window class - use accessor
functions instead.

Related: OS#1759
Change-Id: I0b55aa8947db65f7206adcf53ea32b74a831d9e6
2018-01-12 15:29:41 +01:00
Max 58818585bc Clarify RACH-related interfaces
* make is_11bit parameter into bool
* remove is_single_block() from public interface and mark it as static
* move logging outside of if ladder
* move side-effects from is_single_block() into separate static
  functions
* simplify UL-TBF allocation in case of 11-bit RACH

This immediately makes it obvious that priority is never actually used
despite being computed - seems like a leftover from merge of incomplete
patch series.

Change-Id: If189b7166a29a87ffb17a7a9bc560f674851fd53
Related: OS#1548
2018-01-12 14:24:00 +00:00
Max 8dce1de6d2 TBF: cleanup state flag handling
* introduce generic function to check whether particular flag was set
   for'a TBF and clear it if necessary. Use this instead of
   clear_poll_timeout_flag()
 * add function to explicitly set assignment and appropriate state flags

Overall this makes the code easier to read and debug.

Related: OS#1759
Change-Id: Ic4560280c72f91700f2e19c6c7f6658dc29625c2
2018-01-12 14:17:52 +00:00
Max 467f633b16 TBF: log timer invocation source
When troubleshooting TBF timers we're not only interested in timer
duration but also in the code which triggered it. Let's use LOGPSRC to
log it: wrap t_start() in a macro for convenience.

Change-Id: If5f883ae52c469e5158bad24da9904fdc455582f
Related: OS#2407
2018-01-02 07:26:05 +00:00
Max b2de1f7888 TBF: unify timer handling
Use generic timer handling infrastracture to handle assignment/reject
internal timer. Rename timer array accordingly. Use defines with
explicit second/microsecond values to make it more readable.

Change-Id: I63fb7e6f0695383a83472c836a381a055f64690b
2018-01-02 07:26:04 +00:00
Max 1714aeaa67 Fix warnings
Fix warnings detected by compiler and coverity scan.

Change-Id: If463c7f8769e18d3df74837f0cb0f545cca9b23e
Fixes: CID181479
2017-12-21 11:19:39 +01:00
Max 59e4a4fee1 TBF: add N3101 counter
Properly reset the counter when receiving valid RLCMAC block and update
it when no data is received as per 3GPP TS 44.060 §8.1.1.1

Change-Id: I2f79c6153dc4073c9d293b2824979e6381576682
Fixes: OS#2407
2017-12-20 18:01:55 +01:00
Max ee5be3a009 TBF: implement independent T31xx timers
Previously TBF got single timer so the pending timer was automatically
cancelled when new one was scheduled. Let's make it more robust by
implementing independent T31 xx timers from 3GPP TS 44.060 §13.2 with
corresponding start/stop functions and counters.

The semantics of the timers is preserved as before: pending timers are
restarted unconditionally. It might be neecessary to change this later on
after spec review.

N. B. T0: used for assign/reject timeouts, have to be properly
attributed and documented first.

Change-Id: I0305873ca47534f53441247217881da59625e1f7
Related: OS#2407
2017-12-20 17:49:25 +01:00
Max c21f007277 Introduce LOGTBF* for consistent logging
When troubleshooting complex issues with TBF lifecycle, it's much easier
to follow the logs which are consistently formatted. Add LOGTBF*() macro
similar to struct-specific log routines we use in other Osmocom project
and use it to log TBF-related messages in a unified way. Tweak test
output accordingly.

Related: OS#2407
Change-Id: I388249afefc32d2f6e5cb5e5abc6daf4dbd284ea
2017-12-20 14:14:40 +00:00
Max ea9968f685 Fix tests after rate_ctr change
Recent change lin libosmocore disallow registering rate_ctr with the
same name and indexing multiple times. To accommodate to this check if
rate counters arealready allocated (by static allocator of BTS singleton
for example) and register rate counter with different index.

This fixes the tests for now but eventually we'll remove the BTS singleton
which will allow us to remove this hack.

Change-Id: I7c552ce653b44ec3a31049641728926adc07361d
Related: OS#2757
2017-12-18 22:58:28 +00:00
Max cea806e5b9 TBF: expand timer logging
* log timer values
* log start/stop cause
* update test output as necessary

This simplifies debugging issues with TBF timers.

Related: OS#2407
Change-Id: Ib8e537416af9bec5d447356286f44e9e8bbf1b7a
2017-12-05 18:47:22 +00:00
Max a5eb67d91c Replace '.' in counter names with ':'
The '.' is an illegal character in counter names, as they are exported
via CTRL interface, where '.' has a special meaning that cannot be used
by strings comprising the variable name.

Change-Id: I5ef60152a31dea25cb839c47edc93d5337ec3a3e
2017-11-21 20:24:54 +01:00
Minh-Quang Nguyen 1bcfa9aacf PCU: Fix TA adjustment
Promblem:
 TA provided from L1 PH-DATA-IND is a relative amount of TA adjustment to actual TA
 being used for given TBF. The current TA update algorithm in PCU simply applies the relative
 amount of TA to given TBF but does not take into account of current TA.
 As a result, the PCU will request wrong TA jump for given TBF if the MS is moving away from
 BTS more than 2 km.

 Related issue: http://osmocom.org/issues/2611

Fixes:
- The PCU needs increase or decrease current TA of given TBF on receiving of relative
  amount of TA adjustment provided by PH-DATA-IND from L1
- The PCU needs to set absolute TA of given TBF on receiving absolute TA provided by
  PH-RA-IND from L1.

Change-Id: I65212f8203f1a35278890f51db038d689b2493d5
2017-11-16 10:06:41 -05:00
Harald Welte 3e51d3e5bd Call osmo_init_logging() before static BTS constructor
The BTS constructor uses functions of libosmocore that could in turn
want to log something.  This requires the logging to be initialized
before.

The only way to achieve this is to add an __attribute__((constructor))
function *before* the BTS constructor is being run.

This solution might not be elegant, but  I guess it's the only way to
initialize a C library before calling C++ constructors of global static
instance of a class.

In case anyone comes up with a better / cleaner approach, we can always
change later.

This change requires libosmocore >= 0.10.1, as only that permits
multiple calls to osmo_init_logging() which may now occur.

Change-Id: I28dc4f0db229518348c92413959fed5ae85d753d
2017-10-29 11:02:34 +01:00
Max 5a6bcfb797 cosmetic: convert explicit warnings to fixme/todo
We do not use this style (#warning as an issue tracker replacement) in
any other Osmocom project. Also those warnings clutter compiler output
making it harder to spot warnings for the actual code.

Change-Id: I72070e2a027e60e8b80c12ccfa23ff075434689f
2017-09-04 13:06:01 +00:00
Max f60cf62f4f Simplify polling troubleshooting
* introduce enum describing poll kind and use it in set_polling()
* move state change into set_polling()
* move logging into set_polling() and unify output
* move duplicated code into static function
* adjust tests to match unified logging output

Change-Id: I14074207f8bbc18b3ebd60875bb99a0a3a4b399d
Related: OS#1524
2017-08-14 15:19:08 +00:00
Max a10c39866b Move DL assignment to TBF-DL
This function does not really belongs to BTS and it heavily relies on
direct access to TBF-DL members anyway.

Change-Id: I04584103018675a2f35cfb565473bfd81a208d7c
Closes: OS#1540
2017-08-14 15:50:47 +02:00
Max 341dccd7e2 Move common code into functions
* separate channel request responder into inline function
* move generic TBF poll check into inline function

Change-Id: I9ec3ab8de100f0bc75044f55ac769d1083d52806
Related: OS#1539
2017-08-14 15:49:59 +02:00
Max fd13f6c199 Encapsulate handling of UL ACK timeout
Use helper methods instead checking and manipulating flag directly.

Change-Id: Ia3f009c52118db95b38a077e08eecda844e7f8d1
Related: OS#1539
2017-08-14 15:48:37 +02:00