In some scenarios osmo-bsc is not required, only abisip-find to do the
initial set-up of the BTS, so no need to install osmo-bsc with it.
Change-Id: If3d476a1bd67abcb9cff241ab5989db923873986
Until now, handover_test simply defines an abis_rsl_sendmsg() function to
override the one from libosmo-babis. To me this amounts to implicit linker
magic (aka luck).
The common pattern we're using for this scenario is to explicitly wrap an
existing function by instructing the linker. Also do this for
abis_rsl_sendmsg() in handover_test.c to clarify.
Change-Id: I05ce33a4e42bc82b9ce5060e2f811033f5a1f8d8
Set mr->num_cell to 0 if the bits reflect 0x7, which means that no neighbor
cell measurements are enclosed in the report.
The code in gsm48_parse_meas_rep() acknowledges that, but nevertheless left
num_cell == 7, and evaluating code commonly runs into the mistake of assuming
that actually seven neighbors are being reported on, like:
MEASUREMENT REPORT
0: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
1: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
2: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
3: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
4: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
5: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
6: arfcn=0 bsic=0 neigh_idx=0 rxlev=0 flags=0
There are only up to 6 slots for neighbors, the above listing actually printed
7, because num_cell == 7, which is a potential segfault. (sometimes it printed
uninitialized values instead of 0)
We could fix all meas rep consumers to know what num_cell == 7 means, but
instead setting it to 0 trivially fixes all of them.
Change-Id: Ie12210660a04f2d664ddc92e7ad7fc39ee474180
Add 3-digit flags and use the new RAI and LAI API from libosmocore throughout
the code base to be able to handle an MNC < 100 that has three digits (leading
zeros).
The changes to abis_test and gsm0408_test show that this code now handles
3-digit MNC correctly, by not dropping the leading zero as 0xf in the encoded
PLMN.
Re-implement CTRL commands 'mcc', 'mnc' and 'mcc-mnc-apply' to preserve the
presence of the third digit of the MNC. Always reply with all leading zeros.
Adjust the expected results in ctrl_test_runner.py, to show that it works.
In VTY and CTRL, the parsing of MCC and MNC is inherently made stricter by use
of osmo_{mcc,mnc}_from_str() -- they will no longer allow surplus characters
and detect errno returned by strtol() (in contrast to atoi()).
Depends: Id2240f7f518494c9df6c8bda52c0d5092f90f221 (libosmocore),
Ib7176b1d65a03b76f41f94bc9d3293a8a07d24c6 (libosmocore),
I020a4f11791c61742a3d795f782805f7b7e8733e (libosmocore)
Change-Id: I8e722103344186fde118b26d8353db95a4581daa
If an out of range 'Last Valid Block' value for 'smscb-command'
is passed, a 'last_block' of the 'rsl_ie_cb_cmd_type' struct
could be uninitialized. Let's prevent this.
Found using Clang Static Analyzer.
Change-Id: I57635f2f482ff476ab697b1b9e872ce90aafb999
All callers pass mcc=1, mnc=1, so just have it as default.
(Prepare for net->country_code etc to be replaced by net->plmn)
Change-Id: Ic16bc0bab3f2d4721e86a1a04f9d9f988d777df2
Move from using deprecated gsm48_construct_ra(), which uses a buf, to
gsm48_encode_ra(), which uses a gsm48_ra_id argument. Pass struct gsm48_ra_id
around instead of a buf.
struct gsm48_ra_id is the "encoded" representation of the bytes in a typical
MCC-MNC-LAC-RAC (04.08 Routing Area Id IE, 3GPP TS 24.008 § 10.5.5.15). Using
the struct spares using magic numbers for byte offsets.
In the process, fix a sanitizer warning for unaligned access by using memcpy()
instead of pointer assignment:
osmo-bsc/src/libbsc/abis_nm.c:2857:27: runtime error: store to misaligned address 0x7ffe8e0d6695 for type 'uint16_t', which requires 2 byte alignment
Note that (besides removing a now unnecessary cast) the gsm0408_test and
abis_test tests of RAI / CGI encoding remain stable, which indicates that the
new code is still correct.
Change-Id: I0d3908fb8ca1e2e669d257b5d59b40675fa85d06
Expand MCC-MNC test cases: show that the CTRL interface currently does not
preserve the third digit of the MNC if it is zero. These will be fixed by
I8e722103344186fde118b26d8353db95a4581daa
Change-Id: I5b097dbb6329f284e3b4914a744d5c3ad628f715
This reverts commit faf0982ae2, as it
introduces a severe regression: No more BCCH FILL / SACCH INFO are sent
upon RSL establishment to the BTS. See OS#2719 for more details
Change-Id: I8a4f3be9928bc3a0b61f23dc3e41200105204651
Related: OS#2719
The FSM lacks a proper definition of the FSM event names. This
causes problems when inspecting the FSM using the VTY.
- Add proper FSM Event names
Change-Id: Ief1eff45a896d6191bdc64c232be69e85bfc63dc
Related: OS#2924
After recent libosmocore commit "implement support for 3-digit MNC with leading
zeros" c4fce1425e19d604c199c895e227dc2519110456
Id2240f7f518494c9df6c8bda52c0d5092f90f221, struct gprs_ra_id has a new member,
namely mnc_3_digits. In gprs_ra_id_by_bts(), this new member is now not
initialized and may end up having an arbitrary value, which then may amount to
mnc_3_digits == true. Hence the resulting BCD representation of the MCC-MNC may
inadvertently and randomly indicate a leading zero on the MNC.
Use a struct assignment so that all members are guaranteed to be set, and so
that mnc_3_digits will be zero in all cases.
Since above libosmocore commit, nanobts_omlattr_test fails "randomly", fixed by
this patch.
Change-Id: I872ae3b2b0a0cd8f932f3a5fbc77c0dbfcb28bbf
The S_L_INP_TEI_UP signal was generated when the first message from a BTS
arrives on the OML/RSL link, rather than when the OML/RSL link comes up.
Instead, generate this signal when the link is brought up, so we
intitialize state regardless of how a particular BTS behaves.
Tested with osmo-bts-virtual and virtphy/mobile programs,
and with a sysmobts.
Change-Id: I3b76ae6b00043e706dddc78209311e00ace85bb7
Related: OS#2719
We already have other commands that operate on a given bts/trx/ts/ss,
let's make sure they have a shared/common syntax for consistency.
This also fixes the issue that the handover/assignment commands were
active already in VIEW_NODE, while they should only have been in
ENABLE_NODE.
Change-Id: I1f31e9adf9c75348809ebf9f40f6c69fab248e43
Access Control Class (ACC) ramping is used to slowly make the cell
available to an increasing number of MS. This avoids overload at
startup time in cases where a lot of MS would discover the new
cell and try to connect to it all at once.
Ramping behaviour can be configured with new VTY commands:
[no] access-control-class-ramping
access-control-class-ramping-step-interval (<30-600>|dynamic)
access-control-class-ramping-step-size (<1-10>)
(The minimum and maximum values for these parameters are hard-coded,
but could be changed if they are found to be inadequate.)
The VTY command 'show bts' has been extended to display the
current ACC ramping configuration.
By default, ACC ramping is disabled.
When enabled, the default behaviour is to enable one ACC per
ramping step with a 'dynamic' step interval. This means the
ramping interval (time between steps) is scaled to the channel
load average of the BTS, i.e. the number of used vs. available
channels measured over a certain amount of time.
Below is an example of debug log output with ACC ramping enabled,
while many 'mobile' programs are concurrently trying to connect
to the network via an osmo-bts-virtual BTS. Initially, all ACCs
are barred, and then only one class is allowed. Then the current
BTS channel load average is consulted for scheduling the next
ramping step. While the channel load average is low, ramping
proceeds faster, and while it is is high, ramping proceeds slower:
(bts=0) ACC RAMP: barring Access Control Class 0
(bts=0) ACC RAMP: barring Access Control Class 1
(bts=0) ACC RAMP: barring Access Control Class 2
(bts=0) ACC RAMP: barring Access Control Class 3
(bts=0) ACC RAMP: barring Access Control Class 4
(bts=0) ACC RAMP: barring Access Control Class 5
(bts=0) ACC RAMP: barring Access Control Class 6
(bts=0) ACC RAMP: barring Access Control Class 7
(bts=0) ACC RAMP: barring Access Control Class 8
(bts=0) ACC RAMP: barring Access Control Class 9
(bts=0) ACC RAMP: allowing Access Control Class 0
(bts=0) ACC RAMP: step interval set to 30 seconds based on 0% channel load average
(bts=0) ACC RAMP: allowing Access Control Class 1
(bts=0) ACC RAMP: step interval set to 354 seconds based on 59% channel load average
(bts=0) ACC RAMP: allowing Access Control Class 2
(bts=0) ACC RAMP: step interval set to 30 seconds based on 0% channel load average
(bts=0) ACC RAMP: allowing Access Control Class 3
(bts=0) ACC RAMP: step interval set to 30 seconds based on 0% channel load average
Change-Id: I0a5ac3a08f992f326435944f17e0a9171911afb0
Related: OS#2591
In the past we used to set this to "-10 dBm" which means that basically
no RACH ever passed that treshold and in the associated CCCH LOAD IND
the number of busy slots was always zero.
Let's set the default to -90dBm. The user can of course always
configure a different value in the VTY.
This means that now any RACH slot signal level >= 90 dBm counts as
"busy" in those CCCH LOAD IND (RACH).
Change-Id: Ib9cbb786d19acc74f0951930b0dc9284854c6000
Closes: OS#3004
Related: OS#3003
The rate counter BSC_CTR_PAGING_ATTEMPTED does not increment when
a paging request is sent to the BSC. The reson for this is that the
function call to rate_ctr_inc() is located in a dead code section.
- Move the function call to rate_ctr_inc() to osmo_bsc_bssmap.c.
incremanet on any paging attempt (valid or not) that is recived
on the A-Interface.
- Remove dead code from paging.c
Change-Id: Iec3eb6724bc655806c3ce3c28448069590d99f91
When the cell identifier list of the BSSMAP paging contains an
"No cell is associated with the transaction." entry then the
paging is dropped and no paging is started at all. This is not
correct. When no cell is associated, the BSS should page the
whole BSS instead.
- Replace respective error case with a paging request to all
bts.
Change-Id: Id85e3a7540bdc13cd0e780e7870f16c35c6a6a50
Radio Resource (RR) handling is entirely done inside the BSC. However,
the current implementation forwards unknown RR messages to the MSC.
This is not compliant to the specification.
- Remove the forwarding and drop any unknown RR message.
Change-Id: I0a4d311f6939a4fcee59129daa18da4a2ab510ae
handover_decision_2:
- lchan->conn should never be NULL, but if it is, don't crash in LOGPHO*
macros.
- make certain to avoid modulo-zero. It's cosmetic since that config item is
not allowed to be zero.
handover_test:
- check return value of gsm_generate_si().
- safer evaluation of main()'s argv.
Fixes: CID#182929, CID#182928, CID#182927, CID#182926
Change-Id: I68e8ed3a1e8659edb47ac3e8a10508f17a3f5670
The file meas_proc.c seems to be an earlier stage of development of the meas
rep handling now in handover_decision.c, and to have been inadvertently added
to the git tree in:
commit 9af6ddfcec
Date: Sat Jan 1 15:25:50 2011 +0100
License change: We are now AGPLv3+ instead of GPLv2+
The file has never been part of Makefile.am.
Change-Id: If30724e3c638b191d20d00b897731762fb4896d5
Fix undefined references during link stage when building handover_test.
The archive libbsc.a needs to be listed before the various .so files.
Change-Id: Ie7e1d4815d72b8e0bbc6ccd68078a78de19d73b0
The ALIAS_DEPRECATED causes the legacy commands to no longer show up in the
command listing, hence making it more clear which commands are general and
which are for hodec1 only:
== BEFORE: ==
OsmoBSC(config-net)# list
...
handover (0|1|default)
handover algorithm (1|2|default)
handover1 window rxlev averaging (<1-10>|default)
...
handover2 window rxlev averaging (<1-10>|default)
...
handover2 retries (<0-9>|default)
handover window rxlev averaging (<1-10>|default) <-- legacy
handover window rxqual averaging (<1-10>|default)
handover window rxlev neighbor averaging (<1-10>|default)
handover power budget interval (<1-99>|default)
handover power budget hysteresis (<0-999>|default)
handover maximum distance (<0-9999>|default)
handover2 congestion-check (disabled|<1-999>|now)
OsmoBSC(config-net)# handover ?
0 Disable in-call handover
1 Enable in-call handover
default Enable/disable handover: Use default (0), remove explicit setting on this node
algorithm Choose algorithm for handover decision
window Measurement averaging settings <-- legacy
power Neighbor cell power triggering
maximum Maximum Timing-Advance value (i.e. MS distance) before triggering HO
OsmoBSC(config-net)# handover?
handover Handover general config <-- unchanged
== AFTER: ==
OsmoBSC(config-net)# list
...
handover (0|1|default)
handover algorithm (1|2|default)
handover1 window rxlev averaging (<1-10>|default)
...
handover2 window rxlev averaging (<1-10>|default)
...
handover2 retries (<0-9>|default)
handover2 congestion-check (disabled|<1-999>|now) <-- no more legacy
OsmoBSC(config-net)# handover ?
0 Disable in-call handover
1 Enable in-call handover
default Enable/disable handover: Use default (0), remove explicit setting on this node
algorithm Choose algorithm for handover decision
<-- no more legacy
OsmoBSC(config-net)# handover?
handover Handover general config <-- unchanged
The "Legacy" doc string actually never shows on the VTY console, but it will
show in the reference manual.
(Even with ALIAS(), a 'handover?' would only show the "Handover general config"
doc string, so no loss there from using ALIAS_DEPRECATED().)
Change-Id: I86be674d82242f9ca73a4d0040015c1c79f2422d
Handover decision 2 arguments are now configured by 'handover2 foo'. To match
that scheme, rename the previously 'handover foo' args for handover decision 1
to 'handover1 foo'.
For backwards compatibility, still provide aliases of the original VTY
commands. Writing back the config will result in 'handover1' though.
Change-Id: I7305ae7c04cc70082cd80d42b2ba32ffa399f51a
Instead of reacting on S_LCHAN* signals in the handover decision code,
introduce callbacks for the handover decision to be invoked by handover_logic.c
at the appropriate time.
The rationale is explained in a comment to struct handover_decision_callbacks,
quoting:
"
All events that are interesting for handover decision are actually communicated
by S_LCHAN_* signals, so theoretically, each handover algorithm could evaluate
those. However, handover_logic.c cleans up handover operation state upon
receiving some of these signals. To allow a handover decision algorithm to take
advantage of e.g. the struct bsc_handover before it is discarded, the handover
decision event handler needs to be invoked before handover_logic.c discards the
state. For example, if the handover decision wants to place a penalty timer
upon a handover failure, it still needs to know which target cell the handover
failed for; handover_logic.c erases that knowledge on handover failure, since
it needs to clean up the lchan's handover state.
The most explicit and safest way to ensure the correct order of event handling
is to invoke the handover decision algorithm's actions from handover_logic.c
itself, before cleaning up. This struct provides the callback functions for
this purpose.
For consistency, also handle signals in this way that aren't actually in danger
of interference from handover_logic.c (which also saves repeated lookup of
handover state for lchans). Thus, handover decision algorithms should not
register any signal handler at all.
"
Also:
- Publish struct bsc_handover to use it as argument to above callbacks.
- Add enum hodec_id to struct bsc_handover, to be able to signal the
appropriate hodec algorithm per event.
- Add hodec_id argument to bsc_handover_start*() to be placed in the
bsc_handover struct.
- Publish the LOGPHO logging macros in handover.h along with struct
bsc_handover, convenient for logging in callback implementations.
Replace handover_decision.c's signal handler with a registered
handover_decision_callbacks instance.
(Upcoming handover_decision_2 will use all of the callbacks introduced here.)
Change-Id: Id5b64504007fe03e0406a4b395cd0359232b77d2
The function's return value is ignored. An upcoming patch will use this as
callback function and requires a void return.
Change-Id: Id455a8becbb43884e8205d87b0371b216d0119fc
The conn's penalty timers will be used only for handover decision 2, make it
clear by a sub-struct.
hodec2 will also initialize the penalty timer list on demand only, so no need
to always initialize.
Change-Id: Ie6c2bc2b10dc424dfd94a9e11a9a62f51c48aa10
Handover decision 2 will also store the last seen mr nr for neighbor cell
measurements and hence can tell whether a neighbor's measurement is outdated.
Change-Id: Ic1148364597f91b5a55666c80c758b61fa56f582
Do not share config items between the current handover decision and the
upcoming handover_decision_2.
Rename current handover config items to hodec2_* and duplicate the ones
relevant to handover decision algorithm 1 with name prefix of hodec1_*.
I considered moving hodec2 parameters to an entirely separate .c file and
struct, but that causes considerable code bloat. Rather use the nice
handover_cfg net/bts level mechanism as-is, and simply prefix the names.
In the VTY, the hodec1 parameters are configurable by 'handover foo 23'
commands, while the hodec2 parameters are by 'handover2 foo 23'. The generic
VTY commands to enable/disable handover and to choose the algorithm are still
'handover (0|1)' and 'handover algorithm (1|2)'.
(Note, a subsequent commit will rename the 'handover foo' for hodec1 to
'handover1 foo' and add backwards-compat aliases.)
For example, the 'window rxlev averaging 5' command now exists both for
handover decision 1 and handover decision 2, and its values are independent.
This is valid config:
network
# set up handover decision algorithm 1
# (pending rename of these items to 'handover1 ...')
handover window rxlev averaging 5
handover window rxlev neighbor averaging 5
# set up handover decision algorithm 2
handover2 window rxlev averaging 7
handover2 window rxlev neighbor averaging 7
handover2 penalty-time max-distance 10
# enable handover
handover 1
bts 0
handover algorithm 1
bts 1
handover algorithm 2
In this example, bts 0 uses algo 1 with rxlev averaging of 5, while bts 1 uses
algorithm 2 where rxlev averaging of 7 is in effect.
Change-Id: I6475b2543b18d21710a6d774b214cb484f36ec8e
chan_compat_with_mode() currently only considered the requirements of
voice/csd services. It failed to realize that GSM48_CMODE_SIGN
can also be performed over a SDCCH, resulting in unneeded channel
allocation/assignment to TCH type channels, e.g. for SMS.
This makes TC_assignment_sign pass.
Change-Id: I85ffcbd32ccd2617c897edb3b904f56bacd0684f
Closes: OS#2762
The BSSMAP Cause value should give a clear indication of why a given
operation failed. Previously we were unconditionally sending
GSM0808_CAUSE_NO_RADIO_RESOURCE_AVAILABLE even in cases where mandatory
IEs were missing or other errors occurred unrelated to resource
availability.
Closes: OS#2759
Change-Id: I86adcae2950cbea6dcac4551cfde1054cb0abad1
So far, the administrator had to pick one particular cipher which
would then be used throughout all subscribers/phones. This is a bit
impractical, as e.g. not all phones support A5/3. Extend the VTY
command syntax in a backwards-compatible way to permit for multiple
ciphers.
The bit-mask of permitted ciphers from the MSC (sent in ASSIGNMENT
COMMAND) is intersected with the vty-configured mask a the BSC.
Finally, the best (highest) possible cipher is chosen.
Change-Id: I1d1c8131855bcab2392b4f27f6216bdb2fae10e0
Closes: OS#2461
About half of our log categories/subsystems were inherited from
OsmoNITB, and are no longer used but may confuse the user.
Change-Id: I8b39429f71c0faefdf8158a82093cfb19f44809e
osmo_bsc_sigtran.c uses DRANAP instead of DMSC in two places,
this is not correct.
- change wrong DRANAP to DMSC
Change-Id: I1594d1906cf7d053d00fff52e9dc0ddfd097ed6e
Once upon a time, in the old osmo-bsc-sccplite, there was a restriction
of not being able to handle configurations with both TCH/F and TCH/H
type codecs. This time is long gone, so let's remove this constraint.
Change-Id: Iba0822f57c41cedeeb7f069be540f3a851752a23
Closes: OS#2763
There was always a 1:1 correspondence between gsm_subscriber_connection
and osmo_bsc_sccp_con, so there's really no point in having two separate
dynamically allocated data structures with pointers back and forth and
another linked list around.
Let's merge osmo_bsc_sccp_con into gsm_subscriber_connection for
simplicity.
The resulting code might not be elegant in places, but I've tried to
do only the most simple changes in this patch, while further
simplifications can be done in later subsequent patches.
As a side-effect, this patch also fixes lchan clearing if the MSC
(or the local SCCP provider) hard-disconnects the SCCP connection.
Change-Id: Idd2b733477ee90d24dec369755a00f1c39c93f39
Pau Espin
Neels Hofmeyr
Harald Welte
Philipp Maier