Commit Graph

191 Commits

Author SHA1 Message Date
Neels Hofmeyr ab1b381d1b libcommon-cs: move gsm_network_init() into bsc_network_init()
Some part of the network init was common between libbsc and libmsc in the old
openbsc.git repository. Now osmo-bsc.git is independent with its own copy of
the gsm_network initialization. So move it over to libbsc.

Change-Id: I8968787a5f0b078619264f0cb42349a9bc7943af
2018-02-14 12:55:45 +01:00
Neels Hofmeyr 104851632d libcommon: join gsm_data_shared.* into gsm_data.*
The separation of gsm_data_shared.* from gsm_data.* historically allowed
compiling parts of it into osmo-bts, which we have dropped since (osmo-bts has
its own copy now). Even though gsm_data.* now becomes rather large by it,
remove the legacy separation to get rid of the "shared" naming, which is no
longer meaningful. A future patch might separate into meaningful smaller bits,
if we get the time.

Change-Id: Ie247bc492efb331871d970c56700595ad3f7e201
2018-02-14 12:15:40 +01:00
Neels Hofmeyr 978f58cd2e libcommon: eliminate socket.c
Replace calls to make_sock() with osmo_sock_init_ofd().
Shame on me for not testing every single one in practice, I hope for peer
review to confirm that this should be correct... Read closely please!

The IPPROTO_GRE define seems to be unused (at least in osmo-bsc.git), drop it
completely.

Change-Id: Ia6e4e0e1eed3328fa25b3b90be376d532ad0e56b
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
Stefan Sperling 73acbca50f Make RSL connection attempts time out.
If a BTS/TRX does not respond to the "IPA RSL Connect" command,
pretend that the BTS has sent a NACK for the connection.

To ensure that osmo_timer_del(&trx->rsl_connection_timeout) is not called
before this timer is initialized with osmo_timer_setup(), the E1 layer now
drops incoming RSL messages from a BTS/TRX in LOCKED administrative state.

We cancel the timeout if we receive an RSL Connect ACK or NACK from the BTS,
and if the underlying E1 link does down.

While here, add a missing message buffer free() in bts_isdn_sign_link().
The callers do not free it.

Change-Id: Ia72b65a0f15f47dcb8a6f944f6c3695a4a64b923
Related: OS#2716
2018-02-13 18:08:28 +01:00
Stefan Sperling 81dc9e7455 Add stat items for the BTS's channel load average and T3122.
In addition to logging the current values of a BTS's channel load
average and T3122 override, maintain stat items for these values.
This allows for plotting these values over time, for instance.

These values show up in the VTY under 'show stats' like this:

base transceiver station:
 Channel load average.:       25 %
 T3122 IMMEDIATE ASSIGNMENT REJECT wait indicator.: 32 s

Change-Id: Icace0176e8b1d23d7c7b4816f7c67c65312844fa
Suggested-by: laforge
2018-02-05 22:36:54 +00:00
Harald Welte d9cc21c48f gsm_data_shared.h: Remove unused sacch_deact member field
Change-Id: I806b957b7f6fbbb1206d29ceeccd401c98c26990
2018-02-05 20:45:15 +01:00
Stefan Sperling 6cee893a0f Make "waiting indicator" of IMMEDIATE ASSIGN REJECT dynamic.
The IMMEDIATE ASSIGN REJECT message contains a wait indicator which
tells an MS requesting a channel to wait for a specified amount of
time before trying to request a channel again, i.e. the wait indicator
controls the T3122 timeout value in the MS.

Previously, the wait indicator was fixed to 10 seconds.
This is not sufficient if there are a lot of MS requesting channels
because the MS will retry too soon. Instead of using a fixed value,
maintain a dynamic wait indicator value based on average channel load.

The load (used vs. available channels on a BTS) is sampled once per
second, and once 8 samples have been collected we update a BTS-specific
T3122 wait indicator based on the measured load.

While the wait indicator could go up to 255 seconds, this initial
implementation keeps it in the range from 10 to 128 seconds.

Further experimentation and testing will show whether higher wait
indicator values are desirable, if the sampling rate needs to change,
or if the function mapping the load measurement to a wait indicator
value should change (currently we map the load average linearly into
the range [10, 128] inclusive).

Change-Id: I57e38f6d6ba3b23cc6e1f9520b90261dbb1f1cec
Related: OS#2592
2018-02-05 13:58:17 +01:00
Harald Welte b794887cab remove obsolete gsm_subscriber_connection.bts member
This member was merely a cache for conn->lchan->ts->trx->bts,
so let's avoid having to keep copies of the same data (which needs
to be kept up to date).

Change-Id: Id3bff8b18425ef5d45eb460ac9eb620023013ba0
2018-01-28 03:23:00 +01:00
Andreas Eversberg 084b421fba HO: Add a penalty timer list to the subscriber connection entity
This penalty timer is used to temporarily block cells where handover
or assignment failed or where handover is not allowed. This is usefull
to prevent repeated handover attempts to broken cells or cells that have
limited allowed distance.

Change-Id: I95cb7e3211b2470b773965e7aa94d8eb6c8c1a3a
2018-01-22 01:57:50 +00:00
Andreas Eversberg 935e5d76dd HO: add queue to cache DTAP messages during handover/assignment
Add ho_dtap_cache to gsm_subscriber_connection, a stock msgb queue to be used
with msgb_enqueue() and msgb_dequeue().

Keep a counter of queue length, to enforce a sane maximum counter for cached
messages. So far a hardcoded maximum of 23 messages will be cached.

Have balanced ho_dtap_cache_add() and ho_dtap_cache_flush() functions.

The original patch was by jolly, but I have basically completely replaced it
with the simpler msgb queue pattern.

Change-Id: I6e4d93628befb3d97e5cee0343cd9f8ba0b8620c
2018-01-19 22:09:19 +00:00
Neels Hofmeyr 2660c0412d HO: make bts_by_arfcn_bsic() public
Change-Id: Ie746f76433f6b46a71a91b7714cc034c4355d993
2018-01-19 22:09:19 +00:00
Andreas Eversberg df65c9afee HO: Count number of free timeslot on a given BTS
This is needed for handover algorithm to balance free slots and to prevent
congestion of one cell, while other cells still have free capacities.

Change-Id: Ic8bee8a515ee8aa9a99af71756fe60b8dd8f868b
2018-01-19 18:19:00 +01:00
Neels Hofmeyr 87b5eb667b HO: add handover algo 2 parameters; skip HO 1 if HO 2 is configured
Change-Id: I8811ee8a75be09048042b511ee4bd9bc1de63976
2018-01-19 16:03:16 +01:00
Neels Hofmeyr c561515ae0 HO: enable handover by initializing at startup; rename init function
Change-Id: I224884c84895ebf6c8cf498c16616214cb2b5779
2018-01-19 16:03:16 +01:00
Andreas Eversberg 9869203f65 HO: fix: increase the number of measurement report history to 10
If we want to average over up to 10 measurement reports (as configurable
at VTY), we need a history of at least 10 measurements.

Change-Id: Ia7cfac073bdc464092ca3e51dec319ac30401dd1
2018-01-19 16:03:16 +01:00
Andreas Eversberg 7df80d38f3 HO: Add handover decision debugging category
Change-Id: Iaf99d4e9ae08c38bf364dbb37d42098f976f6b8c
2018-01-19 16:03:16 +01:00
Andreas Eversberg e0cba56dad HO: If handover logic is used to do assignment, signal assignment result
Change-Id: I465caef03626e67d9b3a21bdf730589b9852c211
2018-01-19 16:03:16 +01:00
Andreas Eversberg 7c41cd1ac5 HO: Changed availablilty of ts_is_usable() from static to extern
Change-Id: I3471e38327c4b98490faed9b604fb76438ba9954
2018-01-19 16:03:16 +01:00
Andreas Eversberg 970b43486f HO: Count the actual meas.rep. get_meas_rep_avg fails if not reached
get_meas_rep_avg will return -EINVAL, if the required number of
measurements are not reached. There will be no handover possible until the
given number of measurements are available.

Change-Id: Ibc4410b4e162cdb6c070128d2c63946bb79d6d65
2018-01-19 16:03:16 +01:00
Andreas Eversberg a91800034e HO: Add function to count currently ongoing handovers to a given BTS
In order to keep processing power at BTS at a defined level, the handover
decision might want to limit maximum number of slots that require RACH
detection.

Change-Id: I8908e37fe0d8d2eda906cc6301ba0969b25a5575
2018-01-19 16:03:16 +01:00
Neels Hofmeyr e25018b8c1 HO prep: introduce per-BTS handover config, with defaults on net node
It is desirable to allow configuring handover for each individual network cell.
At the same time, it is desirable to set global defaults.

Treat the 'network' node handover parameters as global defaults, add another
set of parameters for each individual BTS.

This raises questions on how the 'network' node should affect the individual
BTS. The simplistic solution would have been: on creating a BTS in the config,
just copy the current defaults; with serious drawbacks:
- tweaking any parameter in the telnet VTY on network node will never affect
  any running BTS.
- network node defaults *must* be issued before the bts sections in the config
  file.
- when writing a config back to file, we would copy all net node defaults to
  each BTS node, making the network node configs pointless.

Instead, add a handover_cfg API that tracks whether a given node has a value
set or not. A bts node ho_cfg gets a pointer to the network node config and
returns those values if locally unset. If no value is set on any node, use the
"factory" defaults, which are hardcoded in the API. Only write back exactly
those config items that were actually issued in a config file / on the telnet
VTY. (ho_cfg API wise, we could trivially add another ho_cfg level per TRX if
we so desire in the future.)

Implement ho parameters as an opaque config struct with getters and setters to
ensure the tracking is always heeded. Opaqueness dictates allocating instead of
direct embedding in gsm_network and gsm_bts structs, ctx is gsm_net / bts.

This is 100% backwards compatible to
old configs.
- No VTY command syntax changes (only the online help).
- If a 'bts' sets nothing, it will use the 'network' defaults.
- The 'show network' output only changes in presence of individual BTS configs.

On 'show network', say "Handover: On|Off" as before, iff all BTS reflect
identical behavior. Otherwise, output BTS counts of handover being enabled or
not.

Use the same set of VTY commands (same VTY cmd syntax as before) on network and
BTS nodes, i.e. don't duplicate VTY code. From the current vty->node, figure
out which ho_cfg to modify.

For linking, add handover_cfg.c (the value API) in libcommon, while the
handover_vty.c is in libbsc. This is mainly because some utility programs use
gsm_network and hence suck in the ho stuff, but don't need the VTY commands.

Review the VTY online help strings.

Add VTY transcript test for handover options, testing config propagation from
network to bts nodes, 'show network' output and VTY online help strings.
(Needs recent addition of '... !' wildcard to osmo_interact_common.py.)

I considered leaving parts of this more readable, but in the end decided for
heavy use of macros to define and declare the API, because more values will be
added in upcoming patches and I want to prevent myself from messing them up.

Inspired-by: jolly/new_handover branch, which moves the config to 'bts' level
Depends: I7c1ebb2e7f059047903a53de26a0ec1ce7fa9b98 (osmo-python-tests)
Change-Id: I79d35f6d3c0fbee67904378ad7f216df34fde79a
2018-01-19 16:03:16 +01:00
Neels Hofmeyr be1131df42 HO: fix recovery from failed handover
Do not instruct the MGW to move the RTP to the new lchan before we have
received a HANDOVER DETECT.

Before:

  Chan Activ
  Chan Activ Ack
  IPACC-CRCX
   -ACK
  IPACC-MDCX
   -ACK
  MGCP MDCX --> MGW
  ...
  HANDOVER DETECT
  Call continues on new lchan

In above sequence, if the HANDOVER DETECT times out, the MGW has moved to the
new lchan which never becomes used and is released. Furthermore, from the IPACC
MDCX until the HANDOVER DETECT, the RTP stream would break off momentarily.

After:

  Chan Activ
  Chan Activ Ack
  IPACC-CRCX
   -ACK
  IPACC-MDCX
   -ACK
  ...
  HANDOVER DETECT
  MGCP MDCX --> MGW
  Call continues on new lchan

If the HANDOVER DETECT times out, the call happily continues on the old lchan.

This change is inspired by Ivan Kluchnikov's HO work, who implemented a similar
fix in the openbsc.git codebase (branch fairwaves/master-rebase): his patch
moves ipacc_mdcx() to connect RTP to the new lchan from switch_for_handover()
(which triggered on S_ABISIP_CRCX_ACK, i.e. creation of the new lchan) to later
on in ho_detect() a.k.a. the S_LCHAN_HANDOVER_DETECT signal handler:
http://git.osmocom.org/openbsc/commit/?h=fairwaves/master-rebase&id=9507a7a1ea627e07370c9d264816bb190b3b91b8

This patch does essentially the same: remove the mgcp_handover() call from the
MDCX-ACK handling (creation of the new lchan), and add a signal handler for
S_LCHAN_HANDOVER_DETECT to osmo_bsc_mgcp.c to effect the MGW switchover.

Note, it would have been possible to call mgcp_handover() directly from rx of
the HANDOVER DETECT message, but that produces linking fallout in some utils/
projects, which then need to link the mgcp code as well. That is because those
aren't properly separated from the more complex parts of libbsc. Using the
signal is a bit bloaty, but saves the linking hell for now. I've faced a
similar problem twice recently, it would pay off to separate out the simpler
utils/ and ipaccess/ tools so that they don't need to link all of libbsc and
osmo-bsc, at some point (TM).

Change-Id: Iec58c5fcc5697f1775da7ec0111135108ed1fc8f
2018-01-19 16:03:15 +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
Stefan Sperling 714c2f9552 Move BTS selection for paging from osmo_bsc_grace.c into osmo_bsc_bssap.c.
We can now either page an invidual BTS directly or page several BTS in a
given location area. This decision is taken based on the contents of the
cell identifier list in the paging request. Select a set of BTS for paging
while processing the cell identifier list, rather than requiring the
paging layer to loop over all BTS in the MSC.

This change requires some adjustment in bssap_test. In particular,
this test must now add a BTS to its network in order to pass.

The purpose of this change is to make the layering a bit cleaner.
There is one functional change: We no longer abort paging if paging fails
for a particular BTS. Instead, we keep trying to page on other BTS.

Change-Id: Ic1c72c7f83e53988eb9fedf314b1dc459836833d
Suggested-by: Harald Welte
Depends: Ic7772e75c3d7fb0df6e17e118bb33b3248352d4d
Related: OS#2753
2018-01-16 14:14:01 +01:00
Harald Welte 74b8cdb8e9 Make libcommon, libcommon-cs, libfilter, utils depend on mgcp/sigtran
The stow-enabled jenkins builds are currently failing like below:

make[3]: Entering directory '/build/src/libcommon'
  CC       bsc_version.o
  CC       common_vty.o
  CC       debug.o
  CC       gsm_data.o
In file included from debug.c:34:0:
../../include/osmocom/bsc/gsm_data.h:15:38: fatal error: osmocom/sigtran/sccp_sap.h: No such file or directory
 #include <osmocom/sigtran/sccp_sap.h>
                                      ^
compilation terminated.
In file included from common_vty.c:27:0:
../../include/osmocom/bsc/gsm_data.h:15:38: fatal error: osmocom/sigtran/sccp_sap.h: No such file or directory
 #include <osmocom/sigtran/sccp_sap.h>
                                      ^
compilation terminated.
In file included from gsm_data.c:37:0:
../../include/osmocom/bsc/gsm_data.h:15:38: fatal error: osmocom/sigtran/sccp_sap.h: No such file or directory
 #include <osmocom/sigtran/sccp_sap.h>
                                      ^
compilation terminated.

Let's make sure the common gsm_data.h have all required CFLAGS to compile.

Change-Id: I30b75db6ffba227b05b5413b84b15f69e0c213f2
2018-01-15 20:14:01 +01:00
Stefan Sperling 090550f5f8 Implement support for paging based on CI (cell identifier).
This builds upon https://gerrit.osmocom.org/#/c/5698/ which implements
support for paging by LAI.

The ttcn3 test TC_paging_imsi_nochan_ci passes with this code when
run in isolation. It does not pass if another paging test (such as
TC_paging_imsi_nochan_lai) is executed beforehand. This problem
looks similar to the scenario tested in TC_paging_imsi_a_reset.

Change-Id: Ic7772e75c3d7fb0df6e17e118bb33b3248352d4d
Depends: Ic3c62ff0fccea586794ea4b3c275a0685cc9326e
Related: OS#2753
2018-01-15 10:46:43 +00:00
Vadim Yanitskiy 6b103e14ba bsc/gsm_04_80.h: clean up useless declarations
This change removes a few USSD specific declarations, which are
not actually used now, and probably accidentally migrated from
legacy OpenBSC.

Change-Id: I060223349971a7fce169a018bf16eb91f0e20342
2018-01-12 14:06:56 +00:00
Vadim Yanitskiy d783a7574f bsc/gsm_04_80.h: use '#pragma once' instead of includes
This is a common include guard way for Osmocom projects.

Change-Id: Iee73e24a2438b6081a5d569db7d48725b564ee3a
2018-01-12 14:06:55 +00:00
Stefan Sperling 55a954bba1 Support control connection status query for a particular MSC.
Add a new control command 'msc.N.connection_status' which can be used
to query the connection status of a particular MSC with number N.

Keep the old control command 'msc_connection_status', which always
queries MSC 0, for backwards compatibility.

Change-Id: Ibd41474a1be80e782b19ec337c856b5efc593fa8
Related: OS#2729
2018-01-09 11:18:10 +00:00
Harald Welte ed23c1d83d Reduce T3109 default from 19s to 5s
T3109 is started when the BSS sends a RR CHAN REL to the MS and stops
downlink SACCH generation. Stopped when the MS successfully releases the
LAPDm link. After stop or timeout, the radio channel is released using
RSL RF CHAN REL.

Recommended values in literature are 1-2s + RadioLinkTimeout*0.48s or
5s, while we had the absurdly high 19s timeout.  This means we occupy
the radio channel way longer than needed in situations where the MS is
no longer able to properly release Layer2 (LAPDm DISC) due to loss of
signal or the like.

See also: https://osmocom.org/projects/osmobsc/wiki/Timers

Change-Id: I7416b4118e5b73c6ffb98e3546bc62a36c7a967a
Closes: OS#2734
2018-01-04 11:13:41 +00:00
Harald Welte 148ee361b3 cosmetic: Hide all accesses to conn->bts behind conn_get_bts()
This is a new inline function that hides all accesses to conn->bts.

A follow-up patch will then point this to conn->lchan->ts->trx->bts
to get rid of the bts field.

Change-Id: Ib6cf7097ced34eebe80441c29ab1534f21956a33
2017-12-23 00:23:08 +01:00
Philipp Maier 75f2c8d47f mgcp: cancel transactions on timeout
when a transaction to the MGW times out, then the context
information is freed. Unfortunately the client is not informed
about this and will try to execute the callback anyway.

explicitly cancel the transaction in order to prevent access
to already freed data structures.

Change-Id: I40794dff7d10e2b6a96863a2da7e9fbd5662a1bf
2017-12-20 11:48:18 +01:00
Harald Welte 472275c301 remove unused 'lac' member of 'struct gsm_subscriber_connection'
This field was used in write-pnly mode, i.e. set but never read.

Change-Id: I319945538fd3e3bc5cf3b9d82533641cb8ba5256
2017-12-19 18:58:51 +01:00
Harald Welte 4a8ebc8394 gsm_data.h: Document all fields of gsm_subscriber_connection
Change-Id: I429fe7817f075d0794645d37f5ea11b104102ba0
2017-12-19 18:58:51 +01:00
Harald Welte ea0c3203db osmo-bsc: Move user plane/voice related bits into sub-structure
This clarifies which members of the struct are for what.

Change-Id: I618822e6f2d48adce25f9df5c25acbce7c858412
2017-12-19 18:58:51 +01:00
Harald Welte ca494f385e osmo_bsc.h: document every field in 'struct osmo_bsc_sccp_con'
Change-Id: I674ed61a22fad5cc09c45128dbc73474893aefb6
2017-12-19 18:58:51 +01:00
Harald Welte 95464c78fd Remove unused struct osmo_bsc_sccp_con member sccp_queue_size
Change-Id: Ibc4b8f3776c35df7e81252efb78ec740a371de7f
2017-12-19 18:58:22 +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 3edbd0e065 Remove some more dead code
Change-Id: I919bffe88babd90227c89abd4434322965c32ebb
2017-12-19 17:53:14 +00:00
Harald Welte 8311a81bae Remove bogus MM INFO configuration
The network name and other MM INFO is controlled by the MSC, not the BSC.

Change-Id: I1cbf72fc50cff29e7c1633ba752cbf15b4b84c58
2017-12-19 17:53:14 +00:00
Harald Welte c499e5c62e Remove bogus vty config for LU reject cause
The LU reject cause (like anything MM related) is under control of
OsmoMSC, not BSC.

Change-Id: I559ae31d67726845c9699c8b6127e21c6f63ace6
2017-12-19 17:53:14 +00:00
Harald Welte faacb090f6 Remove unused RRLP options/codec
RRLP is handled in OsmoMSC after the split from NITB, so let's remove
any bogus VTY commands left over in the BSC.

Change-Id: Ib626f43a3a3ca69dfc127afe5832eb58f7fb6a38
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
Harald Welte 00d64fd5ec Add new "chan:mode_modify_nack" counter to count RSL MODE MODIFY NACK
Those NACKs shouldn't happen in production, and if they do, you probably
want to have a more persistent figure than a line in the log file about
it.  Having counters allows the user to monitor this efficiently.

Change-Id: Ic82c6baaf4cb88d07bc5cdc200f8279cf130f396
2017-12-14 15:03:43 +01:00
Harald Welte 581398afab Add a new counter "rsl:ipa_nack" to count number of IPA related NACKs
Those NACKs (CRCX/MDCX/PDCH_ACT) shouldn't happen in production, and
if they do, you probably want to have a more persistent figure than
a line in the log file about it.  Having counters allows the user
to monitor this efficiently.

Change-Id: I5edf979c9a2b4c9a5a60eef9f66c26da54f2bddf
2017-12-14 15:03:43 +01:00
Harald Welte 62d9cb0529 Add new per-BTS "rsl:unknown" counter to count unknown RSL messages
Change-Id: I268f222140fa5783e1d19f81fbd45614aaa4b8c4
2017-12-14 15:03:43 +01:00
Harald Welte 4f59892ce6 Add per-BTS rate_ctr for total + failed number of RSL CHAN_ACT
Change-Id: I471b598af194dee78ebaa3414b6290c72d9bbcff
2017-12-14 15:03:43 +01:00
Harald Welte 6e59ced031 Reduce T3113 default from 60s to 10s
Our T3113 timer default of 60s was set early in the development of
OpenBSC, where we didn't really know what values to use and used
excessively large/safe values. Paging the same MS for 60 seconds (even
if there's no paging response) will however create a lot of PCH load for
no good reason.

It seems there's no clear guidance as to what the value should be. Other
implementations use something in the order of 10 seconds (OpenBTS,
yateBTS), which seems more realistic. THe Siemens BS-11 has a default of
5 seconds.

Let's be conservative and go to 10s as a default, which is already 6
times less potential PCH usage than our default so far...

Closes: OS#2756
Change-Id: If9c8441939c6fdcf6e2b9ede8cc576eb86296209
2017-12-14 13:06:33 +01:00
Harald Welte cf9d431e89 libbsc: paging: more reasonable (and detailed) paging statistics
Counting the number of T3113 expirations (one per subscriber per BTS)
vs the number of paging attempts (Bsc global) is a ueseless figure,
as you cannot relate each other.

We count on the BSC level:
	* how many PAGING we received from the MSC (total)
	* how many of those were for cells/LACs we don't serve
	* how many of those resulted in PAGING RESPONSE

We count on the BTS leve:
	* how many PAGING CMD we sent to the BTS (total)
	* how many of those we ignored as we were already paging
	* how many of those resulted in PAGING RESPONSE
	* how many were expired due to T3113 expiring

Change-Id: I410bbcbb2621f95f11238f7a5da01ab438f5fee1
2017-12-14 13:06:33 +01:00
Philipp Maier 66d2ef81b6 cosmetic: osmo_bsc_mgcp: improve comments
Make the comments for struct mgcp_ctx more expressive

Change-Id: Ie80b4915055e3f944ff1870c38e3609197ab72b2
2017-12-13 20:20:15 +00:00
Max 61b0c30cca Generate SI2bis Rest Octets
According to the spec it's an empty 1-byte element reserved for future
extension but we still have to generate padding properly. Add stub
function similar to the used for SI2ter and adjust test output
accordingly.

Related: OS#2711
Change-Id: I3c278c57880a173df3c4648c9724339d23ce94fd
2017-12-12 18:00:56 +00:00
Harald Welte d382bf63e2 paging: Stop all paging if MSC sends us BSSMAP RESET
When the MSC has lost its state and issues a RESET, we should not only
clear all ongoing radio connections, but we should also stop any paging.
There's no point in paging a subscriber if the MSC doesn't know about
this paging anymore.

Change-Id: If3f53d3bb66ad2dc02db823cb813590c6b59c700
Closes: OS#2736
2017-12-11 16:21:38 +01:00
Harald Welte f4b66fb2f1 paging: Remove obsolete paging call-back support
The call-back was needed inside the NITB to determine which part (CC,
SMS, ...) had triggered a given paging.   A pure BSC doesn't need that
feature, so let's get rid of it.

The 'void *cbfn_data' is replaced with a 'struct bsc_msc_data *', as
all callers use it with that type.

Change-Id: I8839e8338d3ad1a91b41e687e8412fcdca3fd9ab
2017-12-11 16:21:38 +01:00
Harald Welte dea252d29c Change T3101 default from 10s to 3s.
This timer is started when a channel is allocated with an IMMEDIATE
ASSIGNMENT message. It is stopped when the MS has correctly seized the
channel.  Ever since the early days of development we were using a very
long timeout to be on the safe side.  However, in production networks
this is a terrible waste of resources, as we will occupy 10s worth
of air-time on one of our channels for each RACH request we receive.

The only scenarios where you might need something absurdly high as 10s
would be if you have 8s of RTT between your BTS and the BSC.

See also https://osmocom.org/projects/osmobsc/wiki/Timers

Change-Id: If3c52a7cf0c06d074c44a2fc414679279189aab9
Closes: OS#2733
2017-12-11 14:03:50 +01:00
Max 4bd710d107 Generate SI2ter Rest Octets
Previously we simply omitted SI2ter Rest Octets which is spec violation
which lead to 'Malformed Packet' error in Wireshark RSL dissector. Fix
this by generating empty 'no rest octets' with proper padding. Adjust
test output accordingly.

Change-Id: Ie4419aaaf93a462f501f8d8f7bf2677d37c58f94
Fixes: OS#2711
2017-12-11 12:27:49 +01:00
Harald Welte 9311005aff Remove 'msc' counter group from BSC
This is left over from the OsmoNITB days.  We're defining and allocating
these MSC counters, but never actually using them.  This also means that
the automatic counter export will list them, raising the expectation at
users that such counters could be used in OsmoBSC.

Let's remove them.  They are in OsmoMSC, but not OsmoBSC.

Change-Id: I5bd9e6e333b1c396beae46630986b17e7f8b82ef
2017-12-09 23:14:50 +01:00
Harald Welte 1ef46d922a rate_ctr: Use ':' as separator, not '.'
In more recent versions of libosmocore, we are converting any '.'
in [rate] counter names to ':' to avoid clashes with the special
meaning of '.' in the CTRL interface.  Let's avoid any conversion
and use the proper name already here.

This also changes the codec_foo counters to codec:foo to follow the
notation of other counters.

Change-Id: I18916abbfc706b86bd211e7cca1a0ca3099826e9
2017-12-09 23:10:46 +01:00
Harald Welte d82101e663 Move many counters from BSC-global to per-BTS granularity
We used to have a lot of counters only globlly per BSC, but they're
much more useful on a per-BTS level.

Change-Id: I954b9dda72b83b91d46a934c221a8b3375743599
2017-12-09 23:07:38 +01:00
Alexander Couzens 547c207579 use _NUM_CHREQ_T to define the size of ctype_by_chreq
Make it future compatible for changes. Otherwise it will break
when additional enums are adding to chreq in libosmocore.
Depends on libosmocore Id67ba8de89dd6288e449197438e9e1c5d7f5a134

Change-Id: I2acab2af8d67bccb2bc495512c1f259ae649a832
2017-12-06 13:25:35 +00:00
Philipp Maier fa85d18807 mgcp: use mgw assigned connection identifiers
osmo-mgw assigns connection identifiers which are returned with
the response to the CRCX.

store the assigned connection identifiers and use them to identify
the connections.

Depends: osmo-mgw Iab6a6038e7610c62f34e642cd49c93d11151252c

Closes: OS#2648
Change-Id: Ib379a6f40875bb8f2cf29038a5b5b7a40a21adab
2017-12-01 13:36:30 +01:00
Philipp Maier 20114aa809 auth: remove obsolete VTY commands
authentication (optional|required) is no longer needed, the
related decisions are now made in the HLR.

Change-Id: Ib6c6331cc86004c4862067031e4fcb12a6975b63
2017-11-30 09:21:51 +01:00
Philipp Maier ad381102ea auth: remove unused structs
The following structs are no longer used/needed:

- gsm_auth_algo
- gsm_auth_info
- gsm_auth_tuple
- gsm_security_operation

Change-Id: I93873a6cb980a54e03e719170e27a7e397236b77
2017-11-30 09:21:51 +01:00
Philipp Maier 3b18044859 sccp-lite: remove obsolete VTY commands
remove obsolete vty commands:

- token
- auth-key
- no auth-key

Change-Id: I9101d750a424b8af46d603bc7c877229bbae8727
2017-11-30 08:18:45 +00:00
Neels Hofmeyr 9c6d01173b HO prep: pass gsm_network to gsm_bts_alloc() already
Prepare for a future change that accesses bts->network during gsm_bts_alloc().

Currently, gsm_bts_alloc() takes a ctx parameter, and gsm_bts_alloc_register()
then gets the gsm_network pointer and sets bts->network to it. All callers
anyway pass gsm_network as ctx to gsm_bts_alloc(), and anything else would not
make sense anyway. So enforce passing exactly gsm_network to gsm_bts_alloc()
and already set the bts->network pointer from there.

Prepares-for: I00870a5828703cf397776668d3301c0c3a4e033a
Change-Id: Ie590c14aa08df4c4f345596b23e5226c5577057a
2017-11-29 17:37:18 +00:00
Neels Hofmeyr a2733ae9dc cosmetic: handover.h: use "#pragma once", declare structs, comments
Use new #pragma style instead of #ifndef dance.
Forward-declare all structs we're using pointers of.
Move function comments to their definitions in the .c file.

Change-Id: I3d43ec01897c0ef9eaf506e68d5a1ec1977f70ea
2017-11-29 17:37:18 +00:00
Neels Hofmeyr f0ea05e52f compiler warnings: add includes in abis_rsl.h, gsm_data_shared.h
Change-Id: Ic0b1410a352c7be399d16d5db7cfe7a62192df6f
2017-11-29 17:37:18 +00:00
Neels Hofmeyr 3d0b76d76e cleanup: drop unused gsm_bts.role
While this header was still shared among several code trees, we had this ROLE
construct in place to exclude some parts in some trees. Since we're having one
copy per code base now, the ROLE #ifdefs were dropped, also drop void *role.

Change-Id: I4f0c337779d8e7266b6e02815d886728c4826bb9
2017-11-29 17:37:18 +00:00
Max c8d55f2c0b cosmetic: mark gsm_objclass2mo as static
It's only used once in the same file so there's no need to put it into
global header.

Change-Id: Id9674cad54bab6cc04475719678efc2c25d058a9
2017-11-29 14:26:15 +00:00
Max c87dc3ee1e cosmetic: drop unused include
Change-Id: I46a2af19358c0eb5d2f1644b10afd58c424a51e8
2017-11-29 14:25:16 +00:00
Max d0ff694cb9 cosmetic: tighten function type signatures
* change return type to bool
* constify parameters

The nm_is_running(), trx_is_usable() and ts_is_usable() always return
boolean value and are always used as such anyway. The also do not change
their parameters.

Change-Id: I6a572fc78371c69f5308edbad0ebe15e143d0505
2017-11-29 14:23:13 +00:00
Philipp Maier ad47f7108a auth: remove obsolete VTY commands
Authentication is no longer done in the BSC, the variables that
set the authentication policy and the IMSI regex have no longer
any effect.

Remove auth policy and authorized-regexp

Change-Id: Ie31b921b5fd0af5501ec0c77c0f08089c10075e2
2017-11-29 11:48:49 +00:00
Max d0f479e744 cosmetic: remove obsolete ROLE_BSC
It's leftover from the time when gsm_data_shared.* was actually shared
with OsmoBTS. Nowadays ROLE_BSC is always defined so we can just drop it
entirely and make working with gsm_data_shared.h slightly easier.

Change-Id: I34fc9ee5955c14bbbde68d5499cf2acfd329afbc
2017-11-29 12:24:52 +01:00
Max aa954cd10f OML: consider administrative state when reporting
Report state as degraded if BTS or any of its TRX are administratively
locked.

Change-Id: Ic9ee998d972ca870ce5d039c3ed95edb6ba8b36f
Related: OS#2486
2017-11-29 12:18:02 +01:00
Pau Espin e8dda5f296 vty: Add cmd to configure 3g Early Classmark Sending
In state prior to this patch, "3G Early Classmark Sending Restriction"
bit in SI3 rest octets was always set to H, which is a sane default as
the policy to send the information is then controlled by "Early
Classmark Sending Control" bit in the same octet.

However, it seems Quortus SoftCore can have some issues decoding the
option, so let's add a vty cmd to be able to disable it for those
having any issues.

Related: SYS#4021

Change-Id: Ic1afe071038a3bb5871d7ff40f665c8644f801ec
2017-11-24 15:01:20 +01:00
Pau Espin 91c76fd656 Use type bool for boolean fields in gsm48_si_ro_info
Change-Id: Ic0981fca96f4927717ca335be1dab00a5d17fd6c
2017-11-24 12:55:15 +01:00
Philipp Maier 7e0c269e5c reset: remove name variable from reset context
The reset context contains a string buffer to allow for setting
a human readable name, that is then displayed in the logs. Since
OSMO-FSMs already have such a feature there is no need for an
extra name variable.

Use LOGPFSML and the name parameter of osmo_fsm_inst_alloc()
to display the name of the FSM

Fixes: Coverity CID#178664

Change-Id: I34511698923abec7545a6f3defd595f97b4bbeb1
2017-11-20 09:21:16 +00:00
Philipp Maier c9179fbcdd cosmetic: remove distracting newline
Change-Id: Iedc883b0f5760f004c51d7cf15328eb8c4d472db
2017-11-12 14:22:46 +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
Max 36bf7974ab Check OML state per-BTS
To properly decide if a given OML link is degraded we have to use
BTS-specific information about MO state.

* move check function into BTS-specific part
* add generic wrapper

Related: OS#2486
Change-Id: Iddc7a4d20fbb95a6566eed1487a12733e5adb9e2
2017-11-02 15:58:08 +01:00
Max 25cc407c5b ctrl: add oml-uptime command
Expose OML link uptime available via vts's "sh bts 0" command with the
new "bts.0.oml-uptime" ctrl command. To avoid code duplication, move
uptime computation into separate function and use it for both.

Change-Id: Iec405aa949d6a38a9c8e64cd7ee4b49fd416835d
Related: OS#2486
2017-10-11 01:28:10 +00:00
Max 3d049d27f5 OML: consider RSL link state
OML link state is available via vty ("sh bts 0" command) and
ctrl ("oml-connection-state" RO variable).

When showing OML link state, take into consideration RSL link state as
well: if OML is up but RSL is missing show it as degraded.

That's implemented via BTS model-specific functions (currently Sysmo- and
Nano- BTS only)

Change-Id: I5952fc59e4d82e0aa627ad91d20f964d9559a4c4
Related: OS#2486
2017-10-09 18:42:15 +02:00
Harald Welte 2da93fc05b Remove any references to RANAP and Iu
This is a BSC, it has norelation to RANAP or Iu(h). Let's remove
an references to it, and also the build dependency to libosmo-ranap-dev

Change-Id: I517b9f69309b2ed0540dd6c186b3d4a2a03aed44
2017-10-04 08:15:32 +08:00
Max d1f70ed234 Show OML link uptime in vty
Save the time when OML link to BTS was established and show it in
vty. That's useful when troubleshooting issues like periodic/sporadic
BTS restart.

Related: SYS#3889
Change-Id: I9e4e8504afe8ca467b68d41826f61654e24d9600
2017-09-27 10:53:28 +00:00
Max 9cc704424a Further cleanup leftovers from BSC/MSC split
* drop unused header
* fix name of jenkins test
* remove dead code

Change-Id: I986904864741995910b6ba92173b9f7b1b03e2f1
2017-09-25 08:25:15 +00:00
Max dc10ce90b2 Wrap channel state assignment in macro
Previously we've used function so debug print always pointed to the same
place which is not very useful. Wrap it with macro so proper
file:line is printed. Also, make sure that we always change state only
through this wrapper and log only when the state has changed.

Change-Id: I21789f8021290965b61a54a2b23177ccbbfe8321
2017-09-23 10:13:55 +00:00
Max 72fbc95c55 SI13: drop PBCCH-related bits
According to 3GPP TS 44.018 §1.8 the "network shall never enable PBCCH
and PCCCH".

Change-Id: I319e71a4b0c682361529e9c21377398a826b934b
Related: OS#2400
2017-09-14 19:17:39 +02:00
Max be356ed32f Make TRX rf locking more visible
* log administrative state transitions
* log what's caused it
* while at it, mark boolean variable as such

Change-Id: I3e25a19fac4d0b4886d825c9876771b1f66efe58
Related: SYS#3864
2017-09-08 08:31:02 +00:00
Neels Hofmeyr 4a0c01167b drop MGCP client from osmo-bsc
After osmo-mgw change I8e0b2d2a399b77086a36606f5e427271c6242df1, there now is a
separated libosmo-mgcp-client, and osmo-bsc needs adjusting.

But besides having an unused struct in gsm_network, osmo-bsc does not yet use
its MGCP client; these are merely plans for the future. Until we do, let's just
drop the dependency entirely.

Change-Id: I6402c7cbe58dacae7630f7f03819f8102e54c699
2017-09-06 16:26:36 +02:00
Neels Hofmeyr c01647914b move include/openbsc to include/osmocom/bsc
Change-Id: I39e7b882caa98334636d19ccd104fd83d07d5055
2017-09-06 16:26:13 +02:00