Actually schedule an activation timer for the activation part of a dyn TS
switchover. It needs to be restarted because the channel release procedure in
the first part of a switchover actually removes the activation timer.
Change-Id: Ibf50d13ba10298464a8b07e34716763161438990
The dyn_ts_switchover_*() functions made the impression that they act on a
specific lchan of a timeslot. The assumption that we would remember to use e.g.
lchan[1] across a PDCH deactivation is brain damaged to begin with; and
factually we always use lchan[0] anyway (the only case for using lchan[1] would
be when switching to TCH/H, but the channel allocator will always return
lchan[0] for that).
Instead of the brain damaged lchan args, use a ts arg across all
dyn_ts_switchover_*() functions, with one exception: The
dyn_ts_switchover_complete() actually receives an RSL activation ack message on
a specific lchan and needs to evaluate its lchan type. This will always be
lchan[0] as it is now, but we should stick with the lchan the message was sent
for.
For PDCH, a check to use lchan[0] already existed, when composing the ACT
message in rsl_chan_activate_lchan_as_pdch(). Replace with an assertion.
Adjust all callers to pass ts instead of lchan.
In dyn_ts_switchover_start(), there was a dead code check that jumps to
switchover_complete() in case the pchan already matches. This never hits,
because we only call dyn_ts_switchover_start() when pchans mismatch. So avoid
guessing at passing lchan[0] to dyn_ts_switchover_complete() by not calling it
at all but logging an error instead.
In rsl_chan_activate_lchan(), we remember some values before going into
switchover from PDCH. Explicitly store them in lchan[0], because after a PDCH
release we have always and will activate no other than lchan[0].
In dyn_ts_switchover_continue(), move the check for any existing lchan->rqd_ref
further above, and more correctly check all lchans that were so far valid on
the TS, instead of just one.
This partly prepares for a subsequent commit to fix the act_timer use for dyn
TS: with the old lchan arg, we might schedule an activation timer on lchan[1]
but receive an ack on lchan[0] (for PDCH), leading to an act_timer expiry.
Change-Id: I3f5d48a9bdaa49a42a1908d4a03744638c59796a
new counters are:
llc.dl_bytes
llc.ul_bytes
llc.dl_packets
llc.ul_packets
The ip payload bytes are waiting for payload compression
because those data are known then.
Change-Id: I068376d35e84283cb98523cd3097a12c55cdb709
For TCH/F_TCH/H_PDCH dynamic timeslots, the ts->pchan does not lead to a
meaningful value from the subslots_per_pchan[] array. Use the ts_subslots()
function instead, which checks for dyn pchan.
Change-Id: I659acebca82dfb3e305433471be64e9d27439af8
Add web application exposing Control Interface over web. All of SET, GET
and TRAP are fully supported.
Notice: TRAP is converted into 'Server-sent events' according to RFC
6202, see also https://www.w3.org/TR/eventsource/ - this requires
corresponding client.
Due to use of special prefix modified version of python
eventsource-client is necessary ATM.
Change-Id: I87d40c80061f8b3d02d656ab8cadabbfb871b461
Related: OS#1646
Add get_var and set_var functions which handle requested variable while
checking for proper response and id. Split header handling into separate
function.
Change-Id: I08705963c277bd93a011193dd7451a626d606c21
Related: OS#1646
According to documentation for Control Interface Protocol <id> is "A
numeric identifier, uniquely identifying this particular operation",
hence it's best to be illustrated with random integer - use it as
default.
Fix override of id with previously used python-specific objects' id.
Change-Id: I32236c067360526f4e7ee4bbdba64c5137de696d
Related: OS#1646
Commit ec1b5a0e9e introduced an unset cbits
value for the 'special hack for BCCH', where I break out of the switch
without setting cbits. Fix that.
Also remove the comment part that says 'return 0', because I don't return 0.
Change-Id: I54129d921807971eeafc23f80c57666c67b71377
In https://gerrit.osmocom.org/589 , msuraev reports an assertion on octphy.
So disable this recently added assertion until we clarify the invocation in
question.
Change-Id: Ia0f7ae5b114e179ab56b98adbae9810e81b4b88f
Many years ago, there was no difference between the libbsc support for
nanobts and sysmobts. However, this is not the case for a long time
anymore, and there are some specifics in OsmoNITB when it comes to
sysmobts. Let's have an example config file
Change-Id: I94ae57c9a3cb497ca39d56270fa15ed65d7f147e
Introduce explicit __main__ function to facilitate re-use of defined
python functions for ctrl interface.
Change-Id: I9bad8f0dd1d69bd28816bf047d85840e3411bb9c
Related: OS#1646
To avoid two phones picking mismatching TCH pchans, never pick TCH/F on dynamic
TS in osmo-nitb.
Add gsm_network flag dyn_ts_allow_tch_f, set to true by default in
gsm_network_init().
Set this flag to false in osmo-nitb's main().
See http://osmocom.org/issues/1778
Reasoning about ways to solve this:
* a compile time switch doesn't work because libbsc is first compiled and then
linked to both osmo-nitb and osmo-bsc.
* we could test net->bsc_api == msc_bsc_api(), but I have the so-called MSC
split waiting on branch sysmocom/cscn, which will result in msc_bsc_api() not
being linked in the osmo-bsc binary.
* have a function am_i_nitb() with different implementations in osmo-nitb and
osmo-bsc, but then we'd need to add implementations to all tests and other
binaries linking lchan_alloc().
* have a flag in struct bsc_api, but so far there are only function pointers
there.
Having a "global" flag in gsm_network allows to add a VTY command in case we
decide to keep this feature (#1781), has no linking implications and is nicely
explicit.
Tested that osmo-bsc still picks TCH/F on dyn TS indirectly, since I have no
standalone MSC available: when compiling osmo-nitb with the line that sets
dyn_ts_allow_tch_f = false commented out, TCH/F is picked as described in
OS#1778; and by printf-verifying that dyn_ts_allow_tch_f == true in osmo-bsc
main(), only osmo-nitb should have TCH/F disabled.
Related: OS#1778, OS#1781
Change-Id: If7e4797a72815fc6e2bbef27756ea5df69f4bde7
It's no longer just for IPAC style TCH/F_PDCH, but also contains code for
TCH/F_TCH/H_PDCH, so pick a more general name.
Change-Id: Ic19db81eca03fd72738839ee3686b6b4c8b6b437
Init both TCH/F_PDCH and TCH/F_TCH/H_PDCH via dyn_ts_init(), which
refactors dyn_pdch_init().
Make dyn_ts_switchover_start from abis_rsl.c public in abis_rsl.h, so we can
start the initial switchover to PDCH from dyn_ts_init(); in abis_rsl.h include
gsm_utils.h for enum gsm_phys_chan_config.
Change-Id: I5c0b257ba8ff0e9c9a2268681a84b0681a778368
In struct gsm_lchan, add dyn.rqd_ref and dyn.rqd_ta. These save the Channel
Requested details across the PDCH deactivation dance.
abis_rsl.c: add static functions:
* dyn_ts_switchover*() for the various stages of switchover between pchans.
* pchan_for_lchant() to derive the desired pchan from the lchan type that was
set during lchan_alloc().
* rsl_chan_activate_lchan_as_pdch() to compose the simpler RSL CHAN ACT message
without introducing numerous special cases to the normal RSL CHAN ACT code.
In rsl_chan_activate_lchan(), detect and initiate required pchan switchovers if
requested pchan on a dyn TS differs.
In rsl_rx_rf_chan_rel_ack(), initiate or continue pchan switchovers after a
channel was released.
In rsl_rx_chan_act_ack(), notice that a switchover is complete.
In chan_alloc.c, add ts_subslots(): abis_rsl.c will need to know the number of
subslots per pchan, to verify that all lchans are free before dyn TS
switchover. The subslots_per_pchan[] array is static to lchan_alloc.c, and
since we need a non-trivial check for dyn TS anyway, add public ts_subslots()
to lchan_alloc.c, which also checks the current dyn pchan type.
Change-Id: I5c6bce13092a10204113d84678c587c65e35e4fd
Change _lc_find_bts() to _lc_dyn_find_bts() with added dyn_as_pchan arg to
pass exactly as which pchan we'd like to allocate on a dynamic TS. Add
_lc_find_bts() as wrapper so non-dynamic-TS callers remain unchanged.
Also add dyn_as_pchan arg to _lc_find_trx() (not renaming to dyn and wrapping
because there is only one caller).
Implement dynamic allocator logic in _lc_find_trx() and lchan_alloc().
A returned dynamic channel still needs to be switched to the proper mode, which
will follow in another commit.
Replace a fixme comment with a normal comment in subslots_per_pchan[], because
handling of dynamic TS is now defined.
Change-Id: I18da7679300c43220d9baa6a304e8df74d366249
Accept GSM_PCHAN_TCH_F_TCH_H_PDCH for TCH/F and TCH/H if in matching pchan mode
or switching to matching pchan.
Accept RSL_CHAN_OSMO_PDCH chan_nr cbits for GSM_PCHAN_TCH_F_TCH_H_PDCH pchan.
Change-Id: If8f7c118f69e5a9f370bfe25f82f3d5a8de75b51
In gsm_lchan2chan_nr() use the current pchan type.
In gsm_lchan_as_pchan2chan_nr(), add the special case of non-standard cbits for
activating PDCH on a TCH/F_TCH/H_PDCH dyn TS. This way, gsm_pchan2chan_nr()
conforms to the standard and does not need access to a ts struct.
Change-Id: If248b9073b9f397110a2003d8e1a04afdc1c0e20
For upcoming dynamic TS, the pchan choice for RSL De-/Activation is not
trivial. So in order to pass the desired pchan to generate the RSL chan_nr,
introduce gsm_lchan_as_pchan2chan_nr().
To avoid code dup, this requires decoupling the gsm_ts2chan_nr() pchan from the
actual ts struct, so refactor gsm_ts2chan_nr() to gsm_pchan2chan_nr() with
explicit pchan, ts_nr and lchan_nr arguments.
Change-Id: I1a40e8452fe8120d350a27973e56be0b8c8c517f
Dyn TS will add a new type of chan activation, which does not need a Channel
Mode IE. Incidentally, the dyn PDCH also doesn't need this IE if it opts for
sending a PDCH ACT instead. So it makes sense to compose the Channel Mode IE
only after the dynamic decisions are done.
Change-Id: I66d88ad6a4ae7bee1e552960fd4e92aff953125c
System Information 13 field EGPRS PACKET CHANNEL REQUEST is
modified to support 11 bit RACH. Further VTY configuration is added
to enable/disable 11 bit RACH support in EGPRS. By default 11 bit
RACH support is disabled.
Change-Id: I51357bec936c28a26ab9ff5d59e0e30ca3363297
This function outputs a debug log without line ending, which should be
completed by a subsequent DEBUGPC(), so complete the started log line where
missing in three of the switch cases.
The three cases do print another log message, but since these don't start on a
new line when RLL is in debug level, the log output for these is hard(er) to
read without this patch.
Change-Id: I355647e77e1b2d8e75ae1a167fe87a507a38d82d
Incorrect regular expression used by default to authorize all
subscribers to implement authorization policy 'accept-all' prevented MS
from camping on the open network.
Change-Id: I20284b3d40ecf4ca1e67d8cd25afb8d5e4ae3025
It is particularly interesting to see whether a given lchan type is allocated
on a dynamic timeslot.
Change-Id: I8a0bca6d9cd583a0988e5ee8f4e6f74f218f4185
lchan_lookup in abis_rsl.c and rsl_lchan_lookup() from osmo-bts rsl.c are the
same code, except for the log context, which is only set in abis_rsl.c.
Factor out the common code to rsl_lchan_lookup() in gsm_data_shared.c.
Openbsc and osmo-bts each define their own DRSL log constant, so add an int *rc
return code argument and keep the logging part in abis_rsl.c's thin lchan_lookup()
wrapper. Incidentally, this also removes code dup for logging.
To avoid duplicate symbols, the rsl_lchan_lookup() implementation needs to be
removed from osmo-bts, so older osmo-bts git revisions will not build with
this.
Change-Id: Ie89bc5bb9110a0e539d37991dedac6f913211b48
Add state fields osmo_bts_trx_ts->dyn.* to record dynamic timeslot state.
Initialize in gsm_bts_trx_alloc().
Change-Id: I0a4049df8500b4f7c864f1355c4e9238932d1b8f
A new type of dynamic channel will be introduced soon, so prepare some comments
to name the dynamic TS kind more specifically.
Change-Id: I51fa8c2ebba507299e55a5cb7e67e48a6c8471f7
f9f4387686 introduced a check for ran_type,
which potentially leaves reject_cause unset. Fix that.
Change-Id: I0220841ff796f949d00a1415d46b54a3eacc9493
We keep some random snippets of documentation here, but manuals are now
generally kept in osmo-gsm-manuals.git. Particularly the GSUP, OAP and
control interface are documented more extensively there.
To avoid having two sets of (diverging) documentation, let's remove it
from the openbsc.git repository.
Change-Id: I4a4c918587e236a7aa00cf2bb6aa05b090f7229b
Add GSM_PCHAN_TCH_F_TCH_H_PDCH in gsm_pchant_names and gsm_pchant_descs: the
VTY and CTRL can now handle the new pchan type.
Adjust the CTRL iface test to expect the new PCHAN type in the output.
Fixes make check with --enable-external-tests after libosmocore commit
fd80f5a04239c2ab7b561401476dd89f2861748b that adds GSM_PCHAN_TCH_F_TCH_H_PDCH.
Change-Id: I4ad9c972d7f76f7e20cf74d6fc3d1928b644a4f8
Since the osmo_unixsock_listen() was moved to libosmocore
it would be better to use the library's implementation
instead of reinventing the wheel again.
Change-Id: Iacfc39b6214c24084438f8fe04d03952cdc9ebc2
Skip PDCH activation if the GPRS mode is 'none' at:
* TCH/F_PDCH init after OML Enable (dyn_pdch_init())
* after TCH/F_PDCH is released, in TCH/F mode
* in the T3111 error timer callback after a TCH/F_PDCH was released in error
state
Assert the GPRS mode in rsl_ipacc_pdch_activate() to make sure all callers
check the GPRS mode.
Closes: OS#1765
Change-Id: I970e5f9dbcb1c625209e914a4c7696294ed34e62
Split out generation and application of GEA gamma into separate function
which can be used for both encryption and decryption.
Change-Id: I442f2ead57e40d9bcd24e7f1b261041371595360
Related: OS#1582
According to 3GPP TS 24.008 § 4.7.1.2 some GMM frames are not supposed
to be ciphered. Propagate information about the necessity for
encryption between MM <-> LLC to ensure only proper frames are
encrypted/decrypted/dropped.
Change-Id: I0358905e60d1b182f75caec81bfcc72bbbbb2aa1
Related: OS#1582
It is already functional enough to allow testing with real
phones. However, note - there are several limitations in the current
implementation:
* only default value for IOV-UI is supported at the moment
* AUTN-based key material is not supported
Related: OS#1582
Change-Id: I8900b906693496e4e6b35be5a86937c58039ed9e
The A&C reference number specified in 3GPP TS 24.008 § 10.5.5.19
identifies particular request sent by network with the related response
sent by MS. The value transparently copied from request to response by
MS: the spec do not specify what exactly should be in there so we use
rand() to decrease chance for collisions.
Note: variable named 'rand' clashes with standard function rand() so it
was renamed.
Change-Id: I3638821a9b4a0532b28dbbb50faa30c4082579f6
Related: OS#1582
Without this commit it is possible that osmux is disabled again on links with
high jitter. This happens when an MGCP response without X-Osmux header is
received before the NAT receives an Osmux dummy frame from the other side.
Ticket: SYS#2628, SYS#2627
Sponsored-by: On-Waves ehf
Change-Id: Id624b0279aee5e2412059a10296ce7896e2d4628
Previously it was possible to start osmo-sgsn with "auth-policy remote"
but without "gsup remote-*" which resulted in broken setup: no MS could
perform GPRS ATTACH. Add consistency check to vty code to fix this.
Related: OS#1582
Change-Id: Ie4296e7d99d7833f7d828b0196435ea81097cf6e
Previously if subscriber was automatically created it got assigned
random MSISDN number. Make it optional (defaulting to previous behavior)
by adding following:
* new optional no-extension argument for subscriber-create-on-demand vty
command
* db unit tests
* vty test
Note: using the db made with new code might result in subscribers with
empty extension. Such subscribers cannot be deleted using old
code. Make sure not to mix db versions or manually fix it by editing
sqlite with external program.
Fixes: OS#1658
Change-Id: Ibbc2e88e4722b08854ebc631485f19ed56443cbb
The state is directly overwritten by the next function. Because
there isn't any state transition, remove this state.
Change-Id: I7f287692dbd559268fb5e61d81ac19e5dd4827eb
Always set CN domain in outgoing GSUP packets to PS to make it
compatible with osmo-auc.
Change-Id: Ia6ee2e55a41a8ea9e465d7df1b2b3559b553fca8
Related: OS#1582
Use correct vty command for subscriber deletion, adjust assertions
accordingly. The error was cause by inconsistent syntax of vty commands
for subscriber creation and deletion.
Change-Id: I9b9376b4ac0ec066000545167de312ca4460493b
In rsl_rx_rf_chan_rel_ack(), only activate PDCH when in NONE state.
For the case of REL_ERR state, do the PDCH activation in the error timeout
callback after T3111 is done.
Change-Id: I4c55479b252a12039bb3d8c30a9cbf0199ca410e
In gsm_lchant_name(enum gsm_chan_t), use the gsm_chan_t_names value strings
from libosmocore instead of redefining the same strings. The list from
libosmocore is also more complete, including CCCH and PDTCH.
Add a todo comment to move to libosmocore.
In consequence, libosmogsm linkage needs to be added to osmo-bsc_mgcp,
mgcp_test, mgcp_transcoding_test and smpp_mirror, smpp_test.
Change-Id: If65ee7c0619cbc0acb0a15045bd5a969442c93cc
Fail in configure if libgsm is not found.
Before this, the --enable-mgcp-transcoding would gladly accept that libgsm is
missing and the build would fail later because of missing linking and undefined
references.
Change-Id: Ic23157cc5b75694f400a176c31f97d71e861ea02
Do the PDCH DE/ACT before we set the lchan->state to De-/Activation Requested.
It makes more sense semantically to change PDCH mode while the lchan is still
in NONE status. Thus slightly move some invocations:
PDCH ACT: Free the lchan before PDCH activation. Hence remove the lchan_free()
call from the rsl_rx_pdch_act_ack() code path; it used to do the PDCH
activation first and call lchan_free() in the callback.
PDCH DEACT: Set the (TCH) Activation Requested state only within
rsl_chan_activate_lchan(), after the PDCH deact is complete.
Channel allocator: don't pick channels that have a PDCH PENDING flag set, to
avoid using channels that are still in PDCH switchover (despite their state
being NONE).
The lchan_may_change_pdch() sanity checks are becoming a lot simpler.
Change-Id: I4206dd4808e21c3e59393ea7f5ab4f438afff066
Set and clear pending flags on the TS according to PDCH de-/activation.
This will allow changing the time we set the channel state to after PDCH
DEACT and before PDCH ACT, in a subsequent commit.
Also add a sanity check on whether we're sending conflicting or superfluous
PDCH de-/activations on the same TS.
Change-Id: Ieae73271df749ded3d90585116aae01f3ad4ee74
Rename TS_F_PDCH_MODE to TS_F_PDCH_ACTIVE, to more accurately reflect the truth
value's meaning.
Add TS_F_PDCH_ACT_PENDING and TS_F_PDCH_DEACT_PENDING for sysmoBTS (and
possibly other BTS implementations) to remember what to do when the PCU replies
with a channel de/activation. Also add TS_F_PDCH_PENDING_MASK to test for both.
Change from #define to an enum.
Note: These flags are also used in the upcoming osmo-bts-sysmo dyn PDCH
commits, so osmo-bts submission depends on this commit.
Change-Id: I391a103ab599648b0c5d4f3ad613a6d7c48834b3
Previously if subscriber was automatically created it got assigned
random MSISDN number between 20000 and 49999. Make it configurable with
new vty command "subscriber-create-on-demand random" and expand vty
tests to check it.
Change-Id: I040a1d227b0c7a1601dc7c33eccb0007941408a6
Related: OS#1658
Previously length check have not considered AMR format which requires
extra byte for in-band length leading to SIGABRT on incorrect payload
from BTS.
Change-Id: I800f756fc803accace8c7e0b4a42b3744fe78bb6
Fixes: OS#1731
Add dyn_pdch_init() in new file bsc_dyn_pdch.c (new file to avoid linking
issues; bsc_init.c would create undefined references, and putting in a new file
is the easiest solution).
Call dyn_pdch_init() from nm_statechg_event() whenever a TS is enabled.
Revert the |= TS_F_PDCH_MODE chunk from previous commit, since this flag will
now be set after dyn_pdch_init() sent out the PDCH ACT and when subsequently
the PDCH ACT ACK messages are received in rsl_rx_pdch_act_ack().
Change-Id: I0cad93dec59d546b3f3b19e332e0833496031575
Remove check for dyn PDCH in _lc_find_trx(), instead call _lc_find_trx() via
_lc_find_bts() several times, so that pure TCH/F is preferred to TCH/F_PDCH.
Add this logic next to the other channel match decisions in chan_alloc().
BTW, the removed check in _lc_find_trx() whether PDCH is active is not
necessary, as described in the added comment for lchan_alloc().
Original patch idea by jolly, but split in two and implemented differently by
nhofmeyr.
Change-Id: I0c728b922656be03588b775638b610a93f8187d5
For chan_alloc_reverse, _lc_find_trx() should return the last free slot instead
of the first.
Original patch by jolly, but split in two by nhofmeyr.
Change-Id: Iff980242b9b5cb39345aaad0350ee368537677cd
Add bit which can be set on BTS side to indicate that next RTP frame
should be marked as a beginning of speech.
Change-Id: I355a5ae275a2743b29071924c916c4f68c3b3e80
Related: OS#1562
DTXd: to schedule SID repetition we have to know when previous SID was
sent (fn) and if it was UPDATE or FIRST SID (is_update).
DTXu: to properly set Marker bit in outgoing RTP we have to know the
beginning of talkspurt. For codecs without explicit ONSET event we can
do it by setting the flag (ul_sid) upon receiving SID and unsetting it
on speech frames.
Change-Id: I79cbec3b6c6fed5de385f8e202ceaf0b13234778
Related: OS#22, OS#1701
It is necessary for proper reporting of DTXd status during the
measurement period.
Change-Id: I4a033b03fcd0deb4db7a38273b5407511dbf1d6c
Related: OS#1701
In lchan_alloc(), there are several decisions to fall back to another type of
channel, followed by setting the channel type to the fall back type. So far,
this was set regardless of allocation success or failure.
If such fall back type is not available, do not modify the local type variable
and thus report an S_CHALLOC_ALLOC_FAIL on the type originally requested
(report is at the end of lchan_alloc()).
Change-Id: Ie3d4cb74f91db0b8c4f5e595a963099de339ad1a
libosmo-abis do not consider DTX bits while processing TRAU frames. As I
do not have equipment to test it, I'm not sure if/how non-IP BTS will
work in case of DTX - warn users about it.
Change-Id: I94ee69cd309fc343a428ddc66942cd57f2a34c05
Related: OS#22
Add missing mmctx NULL check in gsm0408_rcv_gmm(). gsm48_tx_gmm_status() would
dereference mmctx without checking, so we can't call it if mmctx == NULL.
Follows up on recent e98ba82d2b07c835:
"gprs_gmm.c: Don't try to de-reference NULL mmctx".
Change-Id: If59efbde86c76ffe91a0b33be87273783a2a4a02
Drop erroneous C from a DEBUGPC, should be on a new line.
Drop underscores from IPAC_PDCH_[DE]ACT: all other log messages for IPAC PDCH
are without underscores -- git grep "P(.*IPAC.PDCH.*ACT"
Change-Id: I8fb7a1c1beabb1f4388517383fd0bdc082d557ca
* extend "auth policy" vty command with new option "regexp"
* add vty command "authorized-regexp" for setting arbitrary POSIX
regular expression
* add basic vty test
* add optional "regexp" argument to subscriber-create-on-demand vty
command
With those in place we can now set the regexp against which MS's IMSI
will be matched.
If IMSI match the regexp than MS is allowed to access the network. If
subscriber is already marked as authorized in HLR than it'll be allowed
regardless of IMSI matching.
The same way we can decide whether to create subscribers on-demand
basesd on IMSI regexp match. Similar to authorization this restriction
can be overridden by manually creating subscriber via vty, ctrl
interface or directly in HLR.
Change-Id: I525f4b80676de47d1d422686da2ca012301b0129
Fixes: OS#1647
It's necessary to properly compute timestamp compensation for RTP
packets in case of DTX (or heavy packet loss).
Related: OS#22
Change-Id: Ib42c6a8614a4b73333a83181488dd4069cac14d7
Assert that llme is unused for non-Gb (Iu) connections, and clean up otherwise.
Make sure the cleanup is left below the sgsn_mm_ctx_free() call, as the comment
states.
Change-Id: I891ae21afc1f4f60580b822273b5435e0e17d46f
In case the GMM message did not arrive over a Gb interface, there is no
LLME (and thus the associated pointer is NULL). Don't try to perform
operations on a NULL LLME.
Change-Id: If7f24161cd2826f8ee238d4bc1090adf555cea4e
Soem of the operations we perform in the GMM layer are specific to the
GPRS/EDGE radio access network and its Gb interface. Let's make them
conditional to that in preparation of supporting an Iu interface.
Change-Id: I3efb7c5087afe8e2331ec17bd9fac5029f4bee6c
There was a comment in the code that certain GMM messages require a
valid mmctx pointer. However, nothing actually checked if that pointer
was in fact non-NULL. We plainly crashed if a MS would send us the
wrong message in the wrong state.
Original patch by Harald Welte, but it broke message validity checking,
resulting in sgsn_test failure. This re-implements the NULL check in a
different way, as explained by in-code comment.
Change-Id: I7908de65bec91599f7042549b832cbbd7ae5a9a8
This is the entry point for GMM from Gb. We will create a new one
for Iu, so let's be explicit rather than implicit.
Change-Id: I93c074bf99db041117c0dc03dc8255879845a875
Explicitly mark those sgsn_mm_ctx members that apply for Gb mode and (upcoming)
Iu mode, respectively.
Add some comments in sgsn_mm_ctx.
Change-Id: Ife9b02549f284e2547f16117cf43d7a36948fc4b
Tweaked-By: Neels Hofmeyr <nhofmeyr@sysmocom.de>
libosmocore changed in bf990bb8 Update internal GPRS cipher API
from uint_64 to uint8_t*.
Fix a warning.
Change-Id: Ib5bfe1fb05c693347b11ff4faadd3fc2205ebd76
Previously si2quater SI messages were always scheduled. Check for
neighbor configuration and only schedule si2q when necessary. Add
corresponding unit test.
Change-Id: Ibe997803ffb894133fd4d838410fe735791d414f
Fixes: OS#1727
Reviewed-on: https://gerrit.osmocom.org/81
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
In GSM R99 SI6 has mandatory SI6 rest octets and so far we did
not include them. Add minimal support to generate the right band
indicator.
Target a slightly older version of the SI6 rest octets as we neither
support MBMS nor Random bit stream but should include the band
indicator.
Change-Id: I417a40eb91f42a3416b4e07bb9fb4d7a01aaa36b
Fixes: OS#1698
Related: OS#1725
Reviewed-on: https://gerrit.osmocom.org/71
Tested-by: Jenkins Builder
Reviewed-by: Max <msuraev@sysmocom.de>
Reviewed-by: Holger Freyther <holger@freyther.de>
In c09f8a3b7f as part of a cleanup
I accidently changed the talloc context from "con" to "bsc". The
issue occurred at an earlier commit when assigning req.ctx to the
"wrong" context. The allocation needs to be scoped by the struct
nat_sccp_connection and not the connection from BSC to NAT.
Before we have a nat_sccp_connection we scope the copied imsi to
the bsc_connection and then steal it, but for the identity resp
we will always have a nat_sccp_connection and can already use the
right context.
Change-Id: I53789aad2809e19338ad3b2deb72c4757e7bd524
Related: OS#1733
Reviewed-on: https://gerrit.osmocom.org/102
Tested-by: Jenkins Builder
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Reviewed-by: daniel <dwillmann@sysmocom.de>
Reviewed-by: Holger Freyther <holger@freyther.de>
In AMR 12.2 (mode 7), the actual RTP payload is 33 bytes. Howeerver,
as we store the length of the (dynamically-sized) AMR payload in the
first byte, our buffer needs at least 33+1 byte in size.
Change-Id: If1ad5d2d68c85733306c75ea62f67fe8fbc143b3
Reviewed-on: https://gerrit.osmocom.org/91
Tested-by: Jenkins Builder
Reviewed-by: Harald Welte <laforge@gnumonks.org>
In gsm04_08_clear_request(), in_release == 1 anyway and
msc_release_connection() would exit immediately without any effect. Don't
confuse the reader by passing release=1 arg.
Change-Id: I5bf9eb4889d32ad5e42ac7d096bf62fa3a493e20
Reviewed-on: https://gerrit.osmocom.org/93
Reviewed-by: Holger Freyther <holger@freyther.de>
Tested-by: Jenkins Builder
subscr_name() was called from several places:
* either without a check for subscr being NULL, which for example
was causing a segfault if we hand-over a channel before identifying the
subscriber
* or with an explicit NULL check and the ternary operator (?).
We now simplify the code by checking for the NULL Subscriber in subscr_name()
itself.
Change-Id: Ide09f4a515222eb2ec6c25e7a6a8c5f6cc2ffd4b
Reviewed-on: https://gerrit.osmocom.org/92
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
Drop unused linking of libmsc, and drop duplicate linking of libbsc.
Change-Id: If2d63adb832c72ff1a22c25a78e06b0c244628d2
Reviewed-on: https://gerrit.osmocom.org/88
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
Previously *FULL measurements were always used for handover
decisions. Those are incorrect in case of DTX - check if it was enabled
and use *SUB instead.
Note: *SUB values have higher variance so there might be more "bad"
values compared to *FULL although real quality remains the same.
Change-Id: I95e8e544047a83a256e057a47458678f40a19a15
Related: OS#1701
Reviewed-on: https://gerrit.osmocom.org/66
Tested-by: Jenkins Builder
Reviewed-by: Harald Welte <laforge@gnumonks.org>
* Add per-BTS DTX settings
* Configure Uplink and Downlink DTX separately
* Deprecate global DTX option (it was never tested/used anyway)
* Use libosmocore function for DTX indicator in System
Information (previously it was incorrectly assigned for half-rate
channels)
Related: OS#22
Change-Id: I3d55168475ad47044b6238b55846ea22bdd518a4
Reviewed-on: https://gerrit.osmocom.org/40
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
Move copy-pasted code into separate function to make writing more tests
easier.
Related: OS#1658
Change-Id: I9e39af85718514dd0f081d41c234c9dda77c4b27
Reviewed-on: https://gerrit.osmocom.org/43
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
In the past, normal migration was possible only if the actual
schema version differed from the version used in DB by 1. For
example, if DB uses an old version 3 and you need to use it
with the code written for version 5, the check_db_revision()
will convert it to 4 and DB will still use incompatible schema
version during Osmo-NITB running time. After next run it will
be converted to version 5.
This patch replaces a set of 'else-if' checks by a 'switch'
without 'break' statements between 'case' labels (waterfall).
It makes you able to migrate from current version to the
latest despite any difference between them.
Change-Id: Ia9c2aa86f96b88ad8a710d0a23879ce219bc82dc
Reviewed-on: https://gerrit.osmocom.org/62
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
In commit 4adb136da6 we introduced
a new authentication state SGSN_AUTH_AUTHENTICATE, but we didn't
add that to auth_state_names[] resulting in log messages printing
it abut 'unknown 0x1' rather than something more useful.
The existing GSUP code expected the subscriber data to be piggy-backed
onto the location update response, rather than a separate (and nested)
insert subscriber data request/response phase.
With this patch we should now support both the nested as well as the
piggy-backed version.
In general, if a function generates output data like a msgb (or in this
case filling an osmo_oap_message structure), the output argument
precedes the source. This is what we use all over libosmo*, and it is
modelled after memcpy(), where dst is the first argument, before src.
Let's align osmo_oap_decode(). Intestingly, osmo_oap_encode was already
correct, so the encode/decode functions used different conventions
before.
This rename is the first step of moving the associated functions into
libosmocore.
Also, rename gprs_match_* to osmo_match_shift_* to indicate that it is
not just matching the TLV, but also shifting the data portion.
This is a preparation to move the related code to libosmocore, whilst
at the same time generalizing it from GPRS Subscriber Update Protocol
to the Osmocom Generic Subscriber Update Protoco.
Rather than having a 'private' structure for kc, sres and rand, we
now finally (with 4 years delay) use osmo_auth_vector from libosmogsm,
which encapsulates authentication vectors that can be either GSM
triplets or UMTS quintuples or a combination of both.
gsm_auth_tuple becomes a wrapper around osmo_auth_vector, adding
use_count and key_seq to it.
key_seq is no longer initialized inside gprs_gsup_messages.c, as there
is no CKSN / key_seq inside the message anyway. If a usre of the code
needs key_seq, they need to manage it themselves.
In case both TCH/H and TCH/F or different codecs are configured and
internal MNCC handler is used we might end up in a situation where call
legs with incompatible channel types or codecs would be connected
resulting in a broken audio. Disconnect such calls with appropriate
error message.
Fixes: OS#1663
This adds a very basic, use once example in python on how to connect
and deal with the app specific payload and messages. The code is not
complete as the invokeId should be patched according to the initial
invoke. This excercise is left to future readers of that code.
* support for sending arbitrary static SI2quater.
* vty interface for neightbor EARFCNs specific to SI2quater.
* dynamic generation of SI2quater messages.
* unit test for SI2quater messages.
Fixes: OS#1630
Move define to header file.
Use inline functions where appropriate.
Change int variables which are used as boolean into actual bool to make
code easier to follow.
Use the simpler approach and just call encode('hex') on the str and
then convert it to lower case to keep the tests working.
reproduce:
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> d = '\0\0'
>>> d
'\x00\x00'
>>> "".join("{:02x}".format(ord(c)) for c in d)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 1, in <genexpr>
ValueError: zero length field name in format
fixes:
======================================================================
ERROR: testBSCreload (__main__.TestVTYNAT)
----------------------------------------------------------------------
Traceback (most recent call last):
File "./vty_test_runner.py", line 658, in testBSCreload
b0 = nat_bsc_sock_test(0, "lol")
File "./vty_test_runner.py", line 1150, in nat_bsc_sock_test
ipa_handle_small(bsc, verbose)
File "./vty_test_runner.py", line 1116, in ipa_handle_small
s = data2str(x.recv(4))
File "./vty_test_runner.py", line 1100, in data2str
return "".join("{:02x}".format(ord(c)) for c in d)
File "./vty_test_runner.py", line 1100, in <genexpr>
return "".join("{:02x}".format(ord(c)) for c in d)
ValueError: zero length field name in format
----------------------------------------------------------------------
If we want to separate the BSCs we should separate based on
the source port and not the source ip (at least in the current
test setup).
Fixes:
======================================================================
ERROR: testBSCreload (__main__.TestVTYNAT)
----------------------------------------------------------------------
Traceback (most recent call last):
File "./vty_test_runner.py", line 658, in testBSCreload
b0 = nat_bsc_sock_test(0, "lol")
File "./vty_test_runner.py", line 1145, in nat_bsc_sock_test
bsc.bind(('127.0.0.1' + str(nr), 0))
File "<string>", line 1, in bind
error: [Errno 99] Cannot assign requested address
----------------------------------------------------------------------
Update the comment to reflect that the NAT itself will bind to port
5000 and then the mock MSC will fail to bind to it. Try to move the
mock MSC to another port.
Could fix:
======================================================================
ERROR: testBSCreload (__main__.TestVTYNAT)
----------------------------------------------------------------------
Traceback (most recent call last):
File "./vty_test_runner.py", line 654, in testBSCreload
msc = nat_msc_test(self, ip)
File "./vty_test_runner.py", line 1101, in nat_msc_test
msc.bind((ip, 5000))
File "<string>", line 1, in bind
error: [Errno 98] Address already in use
----------------------------------------------------------------------
Don't assume that one can just bind to a local address that has
not been configured. Remove the unspecific comment as I don't know
to which other tests it is referred to.
This should fix:
======================================================================
ERROR: testBSCreload (__main__.TestVTYNAT)
----------------------------------------------------------------------
Traceback (most recent call last):
File "./vty_test_runner.py", line 655, in testBSCreload
msc = nat_msc_test(self, ip)
File "./vty_test_runner.py", line 1102, in nat_msc_test
msc.bind((ip, 5000))
File "<string>", line 1, in bind
error: [Errno 99] Cannot assign requested address
----------------------------------------------------------------------
Add vty tests for BSC configuration reloading.
Load BSCs configuration on bscs-config-file command:
* remove all runtime configured BSC not in the config file
* close connections to all BSC with updated token value
Fixes: OS#1670
Sponsored-by: On-Waves ehf
Introduce new configuration option bscs-config-file which includes BSC
configuration from the given file. Both absolute and relative (to the
main config file) paths are supported.
Add 'show bscs-config' command to display current BSC configuration.
Note: it is still possible to have BSC configuration in the main
file (provided proper index number is used) and in runtime but BSC
configuration is no longer saved automatically. The management of
included configuration file is left to external tools.
Update configuration examples.
Fixes: OS#1669
Sponsored-by: On-Waves ehf
Factor out 2, add 3 functions. Those functions are simple wrappers
around hex strings specific to IPA protocol. Not all of them are
utilized at the moment but they were checked with wireshark while
working on the tests. It might come in handy if we'd like to further
expand related test harness in future. The same goes for optional
verbosity argument which is not used right now but will be handy for
future debugging.
Extend the existing ctrl command to be able to specify the
algorithm and Ki. In contrast to the VTY no size check is
done. Together with the VTY this code only supports a small
part of what is supported by libosmocore.
The algorithm and ki are considered optional but if a valid
algorithm other than "none" is passed, a KI must be passed as
well.
Extend the test coverage by passing the potential values. It
is not verified that the KI/algorithm is stored.
We should not return a subscriber in case it was not written to
the database. Instead free the memory allocated and return NULL.
Callers in gsm_04_08.c are prepared to have the creation fail.
Related: OS Issue #1657
The issue of db_create_subscriber updating an already existing subscr
is that the same subscriber will then have two entries in the active
subscribers list. In general this will break assumptions that a subscr
can be compared by comparing the pointer.
In the case of the VTY this was not an issue as the created subscr
was immediately destroyed again but it is better to avoid this problem.
Change the VTY command to find the subscriber and then call sync to
have the updated time set. The side-effect is we will now have two
queries for the subscriber. Once through subscr_get_by_imsi and once
through db_create_subscriber.
Change the db_create_subscriber to fail if a subscriber already exists,
and add a testcase for this behavior and do not updated the 'updated'
timestamp of an already existing subscriber.
Add a testcase for this behavior.
Related: OS Issue #1657
Add testcase to issue the subscriber create twice. db_create_subscriber
in db.c will first try to find the subscriber and if it exists, it will
update the "updated" column in the database.
Related: OS Issue #1657
The ip.access nanoBTS seems to have severe issues with BSSGP when
changing the country code and/or network code. It is unlikely that
the proprietary code is getting fixed so we extend the parameter
for the apply-configuration command to carry the 'restart' param.
The nanoBTS continues to be buggy and seems to have broken BSSGP
when changing SIs across new OML connections. Add an easy command
to force the reboot of the system through OML.
Make sure a new auth tuple is initialized after
db_get_lastauthtuple_for_subscr() returns an error, i.e. if no tuple is present
for the subscriber yet.
Before this patch, the first key_seq depended on the typically uninitialized
value that was present in auth tuple's key_seq upon calling
auth_get_tuple_for_subscr().
The very first key_seq used for a new subscriber will now always be 0. Before,
it used to be mostly 1 ("(0 + 1) % 7"), but depended on whether the key_seq was
indeed initialized with 0, actually by random.
In auth_get_tuple_for_subscr(), add missing condition to match incoming
key_seq with stored key_seq, so that re-authentication is requested for
mismatching key_seqs.
Add test for this issue.
Instead of using hardcoded -1 for errors, include -1 in the enum auth_action
type; apply its use.
In the mm_auth test, the string output changes from '(internal error)' to
'AUTH_ERROR', since now the proper enum value is used in auth_action_names[].
Test two situations for AUTH_DO_AUTH_THEN_CIPH:
- when no auth tuple is available
- when the key sequence from LU is marked invalid
Add convenience auth tuple comparison function using stringification.
Add basic MM Authentication test setup, with fake DB access and RAND_bytes().
So far implement simple tests for IO error during DB access and missing auth
entry.
To print the auth action during tests, add struct auth_action_names and
auth_action_str() inline function in auth.[hc].
Don't store an MSC index number in the vty->index void* value. Instead,
store the osmo_msc_data struct directly. Thus avoid warnings about
differences in int vs void* sizes, and save some index lookups.
In OpenBSC, we traditionally displayed a TMSI in its integer
representation, which is quite unusual in the telecom world. A TMSI is
normally printed as a series of 8 hex digits.
This patch aligns OpenBSC with the telecom industry standard.
Signed-off-by: Vadim Yanitskiy <axilirator@gmail.com>
mgcp_transcode.c: In function 'decode_audio':
mgcp_transcode.c:332:4: warning: format '%d' expects argument of type 'int', but argument 7 has type 'size_t' [-Wformat=]
LOGP(DMGCP, LOGL_ERROR,
^
mgcp_transcode.c:332:4: warning: format '%d' expects argument of type 'int', but argument 8 has type 'long unsigned int' [-Wformat=]
mgcp_transcode.c: In function 'encode_audio':
mgcp_transcode.c:390:4: warning: format '%d' expects argument of type 'int', but argument 7 has type 'size_t' [-Wformat=]
LOGP(DMGCP, LOGL_INFO,
^
mgcp_transcode.c:390:4: warning: format '%d' expects argument of type 'int', but argument 8 has type 'size_t' [-Wformat=]
mgcp_transcode.c: In function 'mgcp_transcoding_process_rtp':
mgcp_transcode.c:542:5: warning: format '%d' expects argument of type 'int', but argument 9 has type 'size_t' [-Wformat=]
LOGP(DMGCP, LOGL_NOTICE,
^
mgcp_transcode.c:571:4: warning: format '%d' expects argument of type 'int', but argument 7 has type 'size_t' [-Wformat=]
LOGP(DMGCP, LOGL_NOTICE,
^
There is no concurrency involved and if it failed the first time,
it will fail the second, third, ... time as well. Simply print that
we will leak the database instance.
libosmocore recently added inline functions to relieve callers from applying
bitmasks and bit shifts to access the transaction id of a GSM 04.08 header.
Apply these functions.
Replace hardcoded protocol discriminator and message type bitmasks with
function calls recently introduced in libosmocore.
Note that the release 98 bitmasks slightly differ from the release 99 bitmasks.
This patch uses the "default" gsm48_hdr_msg_type invocation, thus it depends on
libosmocore whether 98 or 99 bitmasks are used.
In some places, use of the bitmask was erratic. Fix these implicitly by
employing the bitmask functions:
* silent_call.c: silent_call_reroute(): add missing bitmask for MM.
* bsc_msg_filter.c: bsc_msg_filter_initial(): RR vs. MM messages.
* osmo_bsc_filter.c: bsc_find_msc() and bsc_scan_bts_msg(): RR vs. MM
messages.
* bsc_nat_rewrite.c: bsc_nat_rewrite_msg(): SMS vs. CC messages.
* bsc_ussd.c: no bitmask is applicable for the message types used here.
* gb_proxy.c: gbproxy_imsi_acquisition(): missing bit mask for pdisc.
In gprs_gb_parse.c: gprs_gb_parse_dtap(), add a log notice for unexpected
message types.
Make the SMPP bind address configurable (used to be harcoded as "0.0.0.0").
Add VTY command
smpp
local-tcp A.B.C.D <1-65535>
while keeping the old command 'local-tcp-port <1-65535>'. Both the old and the
new command immediately change the SMPP listening address and port.
Add a LOGL_NOTICE log when the SMPP listening address and/or port change.
However, to be useful, this patch has to go somewhat further: refactor the
initialization procedure, because it was impossible to run the VTY commands
without an already established connection.
The SMPP initialization procedure was weird. It would first open a connection
on the default port, and a subsequent VTY port reconfiguration while reading
the config file would try to re-establish a connection on a different port. If
that failed, smpp would switch back to the default port instead of failing the
program launch as the user would expect. If anything else ran on port 2775,
SMPP would thus refuse to launch despite the config file having a different
port: the first bind would always happen on 0.0.0.0:2775. Change that.
In the VTY commands, merely store address and port if no fd is established yet.
Introduce several SMPP initialization stages:
* allocate struct and initialize pointers,
* then read config file without immediately starting to listen,
* and once the main program is ready, start listening.
After that, the VTY command behaves as before: try to re-establish the old
connection if the newly supplied address and port don't work out. I'm not
actually sure why this switch-back behavior is needed, but fair enough.
In detail, replace the function
smpp_smsc_init()
with the various steps
smpp_smsc_alloc_init() -- prepare struct for VTY commands
smpp_smsc_conf() -- set addr an port only, for reading the config file
smpp_smsc_start() -- establish a first connection, for main()
smpp_smsc_restart() -- switch running connection, for telnet VTY
smpp_smsc_stop() -- tear down connection, used by _start() twice
And replace
smpp_openbsc_init()
smpp_openbsc_set_net()
with
smpp_openbsc_alloc_init()
smpp_openbsc_start()
I'd have picked function names like "_bind"/"_unbind", but in the SMPP protocol
there is also a bind/unbind process, so instead I chose the names "_start",
"_restart" and "_stop".
The smsc struct used to be talloc'd outside of smpp_smsc_init(). Since the smsc
code internally uses talloc anyway and employs the smsc struct as talloc
context, I decided to enforce talloc allocation within smpp_smsc_alloc_init().
Be stricter about osmo_signal_register_handler() return codes.
Add ctrl_vty_init() calls and feed the ctrl_vty_get_bind_addr() return value to
ctrl_interface_setup() in the following programs:
osmo-bsc
osmo-bsc_nat
osmo-nitb
osmo-sgsn
For osmo-sgsn, move the control interface setup invocation below the config
parsing, so that the ctrl_vty_get_bind_addr() can return the configured
address.
Abort upon unknown options and missing option arguments. This came to my
attention while rewiring the -m and -M options: passing -M without argument
would launch nitb with wrong configuration. So, rather exit immediately.
If there are legacy options that should be ignored, they deserve an own 'case:'
in the option switch. There are none that I'm aware of though.
Strictly speaking, the unix domain socket location is not a name but a path.
The MNCC socket is called path, so it is confusing to call the ctrl socket
a 'name'.
Following the 'line vty'/'bind A.B.C.D' command added in libosmocore, use the
configured address to set the telnet bind for the VTY line. It is now possible
to publish the VTY on a specific local interface (including 0.0.0.0 aka "any").
Implement in all of:
osmo-gbproxy
osmo-gtphub
osmo-sgsn
osmo-bsc
osmo-bsc_nat
osmo-bsc_mgcp
osmo-nitb
In some of these main programs, move the telnet initialization below the
configuration parsing.
Historically, this was not a good idea for programs using bsc_init.c (aka
bsc_bootstrap_network()), since they expected a gsm_network struct pointer in
((struct telnet_connection*)vty->priv)->priv, so that telnet had to be either
initialized or replaced by a dummy struct. In the meantime, the gsm_network
struct is not actually looked up in a priv pointer but in the static bsc_vty.c
scope (bsc_gsmnet), so this limitation is mere legacy (even though said legacy
is still there in an "#if 0" chunk).
In the other binaries I have briefly looked at the init sequence dependencies
and found no reason to initialize telnet above the config file parsing. In any
case, I have tested every single one of abovementioned binaries to verify that
they still parse the example config successfully and launch, allowing VTY
connections on the configured address(es). I hope this suffices.
In all of the above, log VTY address and port. LOGL_INFO is disabled by default
in some of the logging scopes, and since it is a single log message right at
program launch, I decided for the slightly more aggressive LOGL_NOTICE.
Remove unused talloc.h from bsc_vty.c.
In bsc_nat.c, use OSMO_CTRL_PORT_BSC_NAT instead of hardcoding port number, and
include ctrl/ports.h for that.
Fix comment typo "COMAMND"
If an MM context cannot be found based on BBSGP info and a RA UPDATE
REQUEST is received, try to find an MM context with an P-TMSI from
which the TLLI could have been derived. This also checks, whether the
routing area matches.
This is similar to the old behaviour removed by the commits
"sgsn: Only look at TLLIs in sgsn_mm_ctx_by_tlli" and
"sgsn: Remove tlli_foreign2local", except that this will only
be done for RA UPDATE REQUESTs now.
Sponsored-by: On-Waves ehf
Currently the MM context is just overwritten by a call to
sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &old_ra_id) even if it
has already been found by using the BSSGP info. With the changes
made to sgsn_mm_ctx_by_tlli this will never find a MM context if
the routing area has changed. If the routing area has not changed,
the mmctx has already been found if it exists.
This commit splits searching for an MM context (if it hasn't been
found already) from checking, whether a found one can really be
used. The actual search is removed, so that the MS will be forced to
restart the attach procedure, which is less efficient but safe.
Sponsored-by: On-Waves ehf
Currently the code also matches the TLLI against LOCAL and FOREIGN
mappings of the P-TMSI, thus eventually finding MM contexts not
consistent with the TLLI (both tlli and tlli_new differ). On
the other hand, tlli_new is not checked at all.
This commit changes the function to only look at mmctx->tlli,
mmctx->tlli_new, and the routing area.
Sponsored-by: On-Waves ehf
The BSSGP cell identifier is used to get the RA for the TLLI lookup.
The send_0408_message function used in the tests does not set this,
so the RA identifier is always 0-0-0-0.
This commit adds a parameters to pass the RAID and adds missing
dummy RAIDs.
Note that the CI can still not be set and thus is always 0.
Sponsored-by: On-Waves ehf
Currently foreign TLLI are sometimes mapped to local TLLI in the
hope that they will match. This seems to sometimes introduce
inconsisties, possibly leading to a failing assertion in
_bssgp_tx_dl_ud.
This mapping should probably reduce the allocation of additional
LLME during routing area changes.
This commit removes tlli_foreign2local.
Sponsored-by: On-Waves ehf
This patch lets the build script for openbsc find the libsmpp34 installation
with the help of pkg-config instead of assuming the header files are in
/usr/include.
In 'show running-config', timeslot appears as a sub-element of rsl, but it is a
direct child of trx. Fix the timeslot section in vty_out by removing one space
of idention.
Adjust various config examples.
Rationale: it's not relevant for function, but confuses human operators. Fixing
it will save the next hacker some time.
Even if fclose fails the stream is inaccessible and the second fclose
might cause memory violation.
Linux manpage says:
Upon successful completion 0 is returned. Otherwise, EOF is returned
and errno is set to indicate the error. In either case any further
access (including another call to fclose()) to the stream results in
undefined behavior.
Fixes: CID#57958
memcpy has both the source and destination marked as non-null and
we were still passing NULL (with a zero size) to it. While this
makes sense it violates the constraints of the function. Add the
check to see if these values are NULL or not.
+db.c:583:2: runtime error: null pointer passed as argument 2, which is declared to never be null
+ #0 0x40d7f7 in get_equipment_by_subscr (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40d7f7)
+ #1 0x40f6d2 in db_get_subscriber (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40f6d2)
+ #2 0x40bfaa in sms_from_result_v3 (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40bfaa)
+ #3 0x40c847 in update_db_revision_3 (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40c847)
+ #4 0x40cbc3 in check_db_revision (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40cbc3)
+ #5 0x40cf85 in db_prepare (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40cf85)
+ #6 0x406f18 in main /home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test.c:179
+ #7 0x7fd625638a3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f)
+ #8 0x405598 in _start (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x405598)
+
+db.c:590:2: runtime error: null pointer passed as argument 2, which is declared to never be null
+ #0 0x40da23 in get_equipment_by_subscr (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40da23)
+ #1 0x40f6d2 in db_get_subscriber (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40f6d2)
+ #2 0x40bfaa in sms_from_result_v3 (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40bfaa)
+ #3 0x40c847 in update_db_revision_3 (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40c847)
+ #4 0x40cbc3 in check_db_revision (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40cbc3)
+ #5 0x40cf85 in db_prepare (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x40cf85)
+ #6 0x406f18 in main /home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test.c:179
+ #7 0x7fd625638a3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f)
+ #8 0x405598 in _start (/home/builder/jenkins/workspace/Osmocom_Sanitizer/source/openbsc/openbsc/tests/db/db_test+0x405598)
When a MNCC handler wants to issue the MNCC_BRIDGE primitive
overt the MNCC interface, this was not possible so far via the
MNCC socket. This primitive was so far only available from the
internal MNCC handler, more or less by accident I suppose. The reason
for this is in the way the array of two call references had been passed
into mncc_tx_to_cc().
The debug log prints the received/sent bytes in hex. When this data surpasses
the buffer size available for the log string (4096), the log is truncated
and lacks a newline character. Limit the amount of dumped bytes to 1000.
Sponsored-by: On-Waves ehi
Handle peer restart earlier, so that all the tunnels are deleted by the restart
code path, instead of the first one being deleted due to reused TEI. That
caused confusing logging messages.
Also, when receiving Delete confirmations from the peer that didn't restart,
don't complain about unknown peer, but acknowledge and remove the half
invalidated tunnel. This means that the pending delete entry from the restart
code path is not needed / not used, so don't bother to add pending delete
entries upon peer restart.
The test test_peer_restarted_reusing_tei() hits the situation where a tunnel is
removed because of a reused TEI rather than the restart counter. Adjust the
test to expect the "out-of-band" delete request earlier on, and to still see
the half invalidated tunnel around. Enhance the test by adding the delete
response from the peer that didn't restart, and add a final tunnels_are()
verification.
Sponsored-by: On-Waves ehi
Because the sender is known, one unique TEI per tunnel suffices to map the TEIs
that the peers are sending to gtphub, instead of previously 4 (SGSN<->GGSN
interaction on User and Ctrl plane, where each had an own unique TEI).
Also, previously, a tunnel's endpoints should also have been checked against
each other for TEI reuse, not only against the endpoints of other tunnels. This
simplification fixes that problem for free.
Thus simplify TEI reuse detection and improve VTY show readability and
debugging.
Adjust log and VTY output for tunnels.
Adjust tests accordingly.
Suggested-by: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Sponsored-by: On-Waves ehi
Some logging was multiline to ease human reading of debug output. However,
in the VTY output, these newlines lack a CR motion. Split multiline logs into
separate lines.
Also add one missing space.
Sponsored-by: On-Waves ehi
We now store the pre-printed lchan name in lchan->name to avoid having
to call sprintf every time there is a debug statement somewhere,
particularly as most of those debug statements are going to be inactive
most of the time.
Don't route User message back by sequence number, rather test that a
completely unrelated User message is routed back properly.
Sponsored-by: On-Waves ehi
If an SGSN is behind NAT, we cannot rely on the default ports. Specifically,
if a GGSN sends a message, the forwarding to the SGSN should go to whichever
port the SGSN last sent from (whether sequence nr is known or not).
Add sgsn_use_sender config and VTY command, and store the sender instead
of the GSN Address IE and default port if set.
Sponsored-by: On-Waves ehi
Rather than passing a tunnel pointer as function arguments, keep it in the
gtp_packet_desc struct passed around anyway.
Reason: in the next commit (will add sgsn_use_sender), I need the tunnel to be
passed back out to gtphub_handle_buf(), and besides simplifying existing code,
this also makes passing the tunnel back out trivial.
Sponsored-by: On-Waves ehi
During the peer review session with Holger, these things were deemed fixable.
No need to have a static gtp_packet_desc in gtphub_handle_buf.
No need to memcpy, direct assignment does the job.
Remove obsolete comments.
Fix a stray space.
Sponsored-by: On-Waves ehi
If a GSN indicates that it has reset, tear down each known tunnel for that GSN
individually (don't send the GSNs on the other side a different restart
counter, because they represent more than just this GSN).
Sponsored-by: On-Waves ehi
During resolution of the header TEI, also return the tunnel struct that
resolved the TEI, so the Delete PDP Ctx code does not need to look it up
again.
Upon Delete PDP Ctx Request, remember the IEs and that a request was made.
Upon Delete PDP Ctx Response, find the pending delete and remove the
corresponding tunnel, iff the response indicates success.
Add a context deletion to regression tests, rename the test appropriately.
Sponsored-by: On-Waves ehi
gsn_addr_from_str(): return error upon NULL string.
Add some debug logging.
With an empty config, no bind addresses were set, and the address parser
did not check for a NULL pointer, resulting in a segfault.
Sponsored-by: On-Waves ehi
This is a mostly cosmetic change. Instead of separate buffer handling
functions, reduce some code duplication by using a side_idx just like the
plane_idx, with arrays.
Sponsored-by: On-Waves ehi
This could be done way better, discussion is pending/ongoing. It is indeed
quite unlikely that any user will ever hit this situation, so there is no
strong drive to invest effort in a more comprehensive implementation.
Sponsored-by: On-Waves ehi
There's no need to keep two separate number pools when both can be fed
from the same pool. User and Ctrl plane TEIs can technically overlap without
colliding, but it doesn't hurt if they don't overlap, either.
Sponsored-by: On-Waves ehi
Force passing a restart counter, by adding such arg to gtphub_start() (test
suite is not affected by this).
In gtphub_main.c, add -r,--restart-file <path> and next_restart_count() to
maintain the counter file. While at it, tweak the cmdline help to unify the
formatting (mostly commas and a missing line break).
Send gtphub's own restart counter. So far, the sender's restart counter was
copied through, which would break as soon as more than one GSN would talk to
the same peer with differing restart counters.
Also fix the in-mem restart counter data type (one octet, not two).
Sponsored-by: On-Waves ehi
So far, gtphub worked perfectly by only tracking single TEIs ... for probably
most uses. But a Ctrl plane tunnel may have expired despite a still active
corresponding User plane tunnel. The User plane would continue to work
indefinitely, but if any Ctrl messages followed after more than six hours of
Ctrl silence, they would have been dropped due to an expired TEI mapping.
We want to
- combine expiry of a user TEI with its ctrl TEI. (done in this patch)
- upon delete PDP context, remove both user and ctrl TEI mappings. (future)
- when a peer indicates a restart counter bump, invalidate its tunnels.
(future)
To facilitate these, track tunnels, complete with both SGSN's and GGSN's
address, original and replaced TEIs, all for both user and ctrl plane, in a
single struct. A single expiry entry handles the entire tunnel, instead of
previously four separate expiries for each endpoint identifier.
Add the concept of a "side", being either GGSN or SGSN, to index tunnel
endpoint structs, and so on.
Track the originating side in the gtp_packet_desc.
Add header_tei_rx: set_tei() overwrites header_tei, but the originally received
header TEI is still needed to match a Create PDP Context Response up with its
Request (and for logging).
Adjust the test suite to expect tunnel listing strings instead of TEI mappings,
with a bonus of making it a lot easier to grok, and including the IP addresses.
Add regression test for refreshing tunnel expiry upon use.
Note: the current implementation is as slow as can possibly be, iterating all
the tunnels all the time. Optimizations are kept for a future commit, on
purpose.
BTW, the sequence number mapping/unmapping structures remain unchanged.
Sponsored-by: On-Waves ehi
The expiry queues are already used for resolved GGSN addresses, and will
soon enlist tunnel structs. Hence the naming should be more general.
Sponsored-by: On-Waves ehi
Make 100% sure the user adds expiring_items in chronological order by asserting
that a newly added expiry is >= the last expiry in the queue. Add llist_last()
to facilitate.
Sponsored-by: On-Waves ehi
Instead of passing the current time around in function arguments ('now'),
rather store the current time once upon decoding a GTP packet in the
gtp_packet_desc passed around anyway ('p->timestamp').
Sponsored-by: On-Waves ehi
Some gtphub_bind pointers point to an array of binds, some point directly at
instances. Make the distinction between the two more obvious by adding an
'_arr' suffix to the array ones.
Partly in preparation for upcoming rate counters.
Sponsored-by: On-Waves ehi
Clean up functionality is added for the test suite only, to be able to clean
out all allocations and test against memory leaks.
So far, it was sufficient to expire everything to free a gtphub. In preparation
for the upcoming rate counters, which will need to be freed explicitly, add
gtphub functions to clean up everything.
As added bonus, also close the sockets explicitly -- not really needed upon
program exit, neither by the test suite, but *if* we have a cleanup function,
it should clean up everything properly.
Closing the sockets is however kept separate, for the test suite.
gtphub_start() and gtphub_stop() are for normal use (published in gtphub.h),
and gtphub_init() and gtphub_free() are for the test suite, without sockets.
(gtphub_stop() will probably never be called by anyone, but its existence
completes the picture.)
In gtphub_test.c, have a function to clean up the testing gtphub struct. First,
expire everything by timeout, assert emptiness, then call the cleanup function.
Call from each test in the end.
Sponsored-by: On-Waves ehi
Upon calling gtphub_peer_del(), all addresses and ports should already have
expired (by force). Make sure the code heeds that with a so far missing
assertion.
Sponsored-by: On-Waves ehi
From sgsn_vty.c, copy the cfg_grx_ggsn_cmd to add an ares server to the static
sgsn_instance.
This is sort of preliminary. As described in comments, the sgsn_ares functions
should actually be separated from the static sgsn structure. gtphub keeps such
an sgsn structure just for the sgsn_ares functions.
Sponsored-by: On-Waves ehi
gtphub_ext.c's initial purpose was to wrap a specific function. The file
then turned into everything related to DNS, which fits pretty well. Rename
to gtphub_ares.c.
Tweak the header comment to reflect the new file name.
Sponsored-by: On-Waves ehi
Implement min/max bounds for nr_pool, adjust nr_pool_init() and current tests,
and create unit tests for nr_map wrapping.
Sequence numbers range from 0 to 65535, while TEIs range from 1 to 0xffffffff.
Both cause problems when the nr_pool surpasses the range: seq exit their valid
range, causing unmappings to fail, and a TEI would be mapped as zero (invalid).
Add a comment about TEI wrapping, and lose the comment about random TEIs (not
really important).
Sponsored-by: On-Waves ehi
Use unsigned int for nr_map, just large enough to fit the TEI space.
Adjust log output formats and casts accordingly.
Fixes: TEIs are uint32_t, but the nr_map so far used int. This would cause TEIs
from 0x80000000 on to be handled and printed as a negative value.
Sponsored-by: On-Waves ehi
The del_cb is now also used for ares (GGSN resolution) timeouts, and expiry is
anyway separated from nr_map, so this comment is void.
Sponsored-by: On-Waves ehi
This fixes a bug in the following circumstances:
* BSIC is set to 0 in the config file
* No TSC is explicitly specified at the BST level in the config file
In this case, we ended up using BSIC=0 and TSC=7, as TSC=7 is our
default initialization value.
The TSC of the CCCH/BCCH must always be the BCC, which is the lower 3
bits of the BSIC. Having configuration options for both the BSIC _and_
the TSC at the BTS level therefore makes no sense, as it only adds ways
in which users can configure non-oprational configurations. So we
remove the bts->tsc member, and keep only the ts->tsc members that allow
us to configure a timeslot-specific TSC that's different from the BTS
TSC (= BCC).
s_db.c: In function ‘_insert_ud’:
meas_db.c:65:6: warning: implicit declaration of function ‘rxlev2dbm’ [-Wimplicit-function-declaration]
rxlev2dbm(ud->full.rx_lev)));
^
- an unnecessary if-not-NULL check (1339764);
- a missing nul termination safety net (1339768);
- a typo resulting in the wrong proxy being logged (1339767).
Sponsored-by: On-Waves ehi
gtphub always wants to know the sender, hence make the from_addr pointer
mandatory.
Fixes two coverity complaints (1339766, 1339764).
Sponsored-by: On-Waves ehi
Fit most of the code in 80 chars width. Some instances still leak past 80
characters because of long function names, inline comments or the like, "the
exception proves the rule."
Sponsored-by: On-Waves ehi
For maintenance, it is convenient to have the log level explicit at each
log statement.
Tweak some log levels / message formatting while at it.
Sponsored-by: On-Waves ehi
Allow logging the plane (Ctrl/User) and side (SGSN/GGSN) in functions that only
have a gtphub_bind* to work with, by adding a constant label to each bind.
Sponsored-by: On-Waves ehi
If a GGSN is already known from unmapping, don't invoke a host resolution.
In a live working environment, it wouldn't hurt, because the lookups would
mostly return from the cache. But in a testing environment without a name
server, it barfs on every packet.
Sponsored-by: On-Waves ehi
Initialize llist_heads to empty (2 were missing). Move those for struct gtphub
instances to gtphub_zero() (one moved, one added).
In from_[gs]gsns_read_cb(), use a return type that can actually reflect
negative return values.
resolved_addr.buf: no need to take the address of a byte array var
(cosmetic).
Pass the proper user data address to sgsn_ares_query(), not the address of
the pointer holding the user data address.
Initialize ggsn_lookup->expiry_entry (was missing). Publish the function for that
in gtphub.h so gtphub_ext.c can use it.
Sponsored-by: On-Waves ehi
Looking for a segfault, I added a lot of logging. This may be useful for
live testing ares, leaving it in there for now.
Note: I still want to clean up the logging concerning log levels etc. once
we're out of alpha.
Sponsored-by: On-Waves ehi
Allow a peer sending from an unknown port but a known address, and just
create the port (and unmap the seq nr back to this port later to return
the response to the sender).
Only an SGSN on the Ctrl plane is allowed to make the very first contact
from an unknown address.
Sponsored-by: On-Waves ehi
Split decoding return code GTP_RC_PDU in GTP_RC_PDU_C and GTP_RC_PDU_U.
Don't do IEs in GTP_RC_PDU_U.
Add a unit test for User plane data, expected to fail (nonstandard port case).
In gtphub_test.c, tweak logging so that it is easily visible which test
produced which output. Also add the global resolved_sgsn_addr and ggsn_sender,
symmetrically to resolved_ggsn_add and sgsn_sender.
Sponsored-by: On-Waves ehi
Generalize to make the PDP ctx message definitions and "sending" of messages
from SGSN->gtphub->GGSN and back reusable in future tests.
Publish gsn_addr_from_sockaddr() in gtphub.h for use in gtphub_test.c.
Use an osmo_sockaddr for resolved_ggsn_addr, because one is needed for
comparison in probably every future test.
Add LVL2_ASSERT() to print assertion message and return instead of abort,
so that functions can be called from several tests without losing the
info of which test caused it from which line.
Use globals for struct gtphub and time_t now, to reduce nr of args that need to
be passed around when writing tests. Add a default test setup function.
Sponsored-by: On-Waves ehi
Up to now I used the Echo as a test for sequence nr mappings. But Echos
should be handled differently: they are scoped on the link and an Echo
response should be sent right back to the requester.
Sponsored-by: On-Waves ehi
For the resolving function, change the function signature to return a
gtphub_peer_port. In consequence, publish two functions concerned with
gtphub_peer_port instances for use in test and gtphub_ext.c.
Add GGSN resolution queue, callback and cache. Simple implementation: if an
SGSN asks for a GGSN, it will first get no answer, and I hope it will ask again
once the GGSN is in the cache.
Within gtphub_ext.c, have a dummy sgsn struct, as the sgsn_ares code currently
depends on it (half the functions pass an sgsn instance pointer around, but the
other half use the global one).
In the unit tests, wrap away the ares initialization so that they can work
without a DNS server around. The netcat test breaks because of this, will
remove it.
Using sgsn_ares, implement the gtphub_resolve_ggsn_addr() function, I hope:
untested.
Minor cosmetics just to see if you're paying attention... ;)
Sponsored-by: On-Waves ehi
First steps towards a new GTP hub. The aim is to mux GTP connections, so that
multiple SGSN <--> GGSN links can pass through a single point. Background:
allow having more than one SGSN, possibly in various remote locations.
The recent addition of OAP to GSUP is related to the same background idea.
(This is a collapsed patch of various changes that do not make sense to review
in chronological order anymore, since a lot of it has thorougly transmorphed
after it was first committed.)
Sponsored-by: On-Waves ehf
Extend the ul/dl counting to count the usual messages on the
Gb interface. Add counters for the attach, routing area update,
pdp context activation and deactivation procedures. Update the
test result with the new counters.
RPM post-build-checks found some issue and marks these as error:
[ 38s] I: Program returns random data in a function
[ 38s] E: openbsc no-return-in-nonvoid-function meas_vis.c:118
Holger reports that the bitmap that accounts for available Osmux circuit
IDs is limited to 128, when the maximum number of circuit IDs are
determined by the uint8_t field in the header (ie. 256 circuits).
[hfreyther: Update the testcase now that we have more ids to allocate]
Trigger an OAP registration upon IPA connect. Feed incoming OAP messages to
oap_handle() and send replies returned by it.
Add oap_config to sgsn_config (todo: vty).
Sponsored-by: On-Waves ehf
[hfreyther: Fix coding style]
Add new kitchen sink openbsc/utils.h and libcommon/utils.c to make three so far
static functions public (so I can use them in the upcoming OAP code).
A place to put them could have been the gprs_utils.h, but all general functions
in there have a gprs_ prefix, and todo markings to move them away. All other
libcommon headers are too specific, so I opened up this kitchen sink header.
Replace the implementation of encode_big_endian() with a call to
osmo_store64be_ext(). See comments.
Apply the change in Makefiles and C files.
This change has some implications for the test case. It manipulated
bss_ptmsi_state and sgsn_tlli_state variables to make the output of
rand_r() and thus the TLLI/TMSI used predictable.
This possibility is gone when using RAND_bytes() so instead it is
overridden by a function that returns a deterministic sequence of values
(0x00dead00, 0x00dead01, ...). The test cases are adapted to expect
these values instead of the pseudo random values before.
The gbproxy_test stdout file changes as well, but only where the
TLLI/TMSI is displayed (in the hex dumps as well as the TLLI cache
entries). All other output is the same.
This (currently empty) function is meant to contain code that cleans
up the left-overs of the test functions. This is needed by the next
commit to reset the RAND_bytes sequence.
Currently just the number of intercepted downlink messages is counted
and eventually checked. The contents of the messages is lost. The
PTMSI contained in ATTACH/RAU Accept messages is just 'guessed' by
resetting the random number generator after reference PTMSIs have
been generated. While this works with rand_r, RAND_bytes cannot be
forced to recreate a certain number sequence this way (unless the
backend is replaced).
This commit changes that behaviour so that the last received msgb is
kept and decoded. The PTMSI that has been assigned by the SGSN is
then taken in the affected test cases and used instead of a 'guessed'
one. This is similar to how a real MS would react to the Accept
message.
Sponsored-by: On-Waves ehf
This (currently empty) function is meant to contain code that cleans
up the left-overs of the test functions. This will be needed by the
next commit that will store the last received msgb for later inspection.
Sponsored-by: On-Waves ehf
This API is a bit unfortunate as the caller will also
access the endpoint directly. E.g. like this:
output = bsc_mgcp_rewrite(...,
mgcp_net_src_addr(endp),
endp->net_end.local_port, -1,
In terms of "terminology" the "net" was meant to be bad
internet and the "bts" is the local and trusted network
segment. With this terminology the "bts" would be the
call-agent/MGW and "net" where the BSCs will send data
to but that is not the case and terminology actuallys
refers to:
* net: The addresses exposed to the entity that
made the MGCP call
* bts: The system where we get our data for the
local audio flow.
Fix the method but leave the API as it is. Use the net_end
in the net_src method and the bts_end in the bts_src method.
We put a signed integer into this string but did not account
for the newline and for the terminating NUL of the string. Add
the newline to the string and add one for NUL. Spotted while
accidently having a CID of 255.
There appears to be a leak of CIDs:
<000b> mgcp_osmux.c:544 All Osmux circuits are in use!
There are paths that a CID had been requested and never released
of the NAT. Remember the allocated CID inside the endpoint so it
can always be released. It is using a new variable as the behavior
for the NAT and MGCP MGW is different.
The allocated_cid must be signed so that we can assign outside
of the 0-255 range of it.
Fixes: OW#1493
Extend the osmux only setting from the MGCP MGW to the NAT. This
is applied when an endpoint is allocated and/or when the allocation
is confirmed by the remote system.
Not tested. The impact should only be when the new option is
being used.
Fixes: OW#1492
Some systems only want to use Osmux. In case only Osmux
should be used fail if it has not be offered/acked.
Client:
Verified On, Off and Only with X-Osmux: 3 and without this field.
<000b> mgcp_protocol.c:823 Osmux only and no osmux offered on 0x14
<000b> mgcp_protocol.c:884 Resource error on 0x14
NAT:
Not tested and implemented
Fixes: OW#1492
sizeof(uint8_t) == 1 and there is no need to create an array
with 16 bytes and then only use the first two of them. This
means the CID range is from 0 to 127 and we should be able
to extend this to 256 by changing the array size to 32. Update
the testcase now that we can have more than 16 calls with Osmux.
* Test that one can get an id
* That they are assigned predicatble right now
* That returning them will make the number of used ones go down
* That allocating more will fail
The log message does not help and says where the data is
being sent to. This is because we have both a RTP and RTCP
port. Remember if we failed with RTCP or RTP and improve
the log message.
I was searching a case where the port was bound to a local
address (e.g. 127.0.0.1) and tried to send the data to a
public one (e.g. 8.8.8.8).
The signature of mr_config and the BSC implementation didn't
match and the compiler was warning about it:
osmo_bsc_api.c:530:2: warning: initialization from incompatible pointer type
.mr_config = bsc_mr_config,
^
osmo_bsc_api.c:530:2: warning: (near initialization for ‘bsc_handler.mr_config’)
Change the mr_config again and provide an implementation
that will set the ms and bts data structure. It would be
better to put the size outside of the IE but I am not going
to change it right now. It would also be nice to either move
the AMR setting into the "nitb" structure or have the msc
data be used _after_ the bts settings. This needs to be
cleaned up in the next step.
Manually verified by placing a MO call and checking that
both the channel mode modify and the mode modify request
contain the multi rate config with the rate mr config
(length two bytes, version 1, icmi==1, no start mode being
set).
This way a lot of if/else can just be killed by the caller deciding
which of the two instances to use.
I have copied both branches to new files, replace bts for ms in one
of them and ran diff on it. There is no difference.
Merge two copies into a local static helper function. The format
of the message will change and then it is easier to modify it in
one place than in two.
Sadly the original patch was merged before this clean-up so do
the clean-up as second step.
Conflicts:
openbsc/src/libbsc/abis_rsl.c
openbsc/src/libbsc/gsm_04_08_utils.c
The pre-release didn't add a newline after the apn and the patching
pattern command. Create a quirk command that combines both. The
pre-release didn't include a differentation between routing and
patching.
The TLLI handling has a different and more generic name now. Make
it handle the old one that is actively used.
Add a file with the broken format and the standard config file
test should pick it up.
In case of the RTP bridge mode we need to select the codec
ourselves. Rely on the same (incomplete) codec selection that
can be done using the mncc-int configuration node. This might
gain bearer capabilities support.
In case of a SDCCH a TCH/F will be attempted to be assigned.
This is an open issue for both modes and there should be a
preference for full or half-rate channels somewhere.
Implement sending MDCX on the newly allocated channel and send
the data to the same destination as the currently connected one.
This way the receiver can implement RTP RFC Appendix A.1 and
deal with the new source.
For the LCR rtp-bridge audio should directly flow to the
remote system. In contrast to the original patch audio
will now flow directly from the BTS to the remote system.
This assumes that BTS and the remote system are in the
same network segment and can directly communicate.
There are various limitations in the first iteration of
the implementation:
We could (and in the future) should delay the assignment
but currently we are forced to pick the channel and move
it to the audio state. In case we are located on a SDCCH
we always need to change but if we are on a TCH we could
send the ipa.CRCX and change the audio state a lot later.
The net effect is that the audio codec selection needs to
be done in the NITB code and not in the system connected
to it.
This only works with ip based systems. For E1 systems one
could still use the RTP socket or even try to move this
out of the process.
There is no code for handover handling and it relies on
the remote system dealing with the SSRC change of the
system.
This adds the protocol definition for the RTP bridge extension
of Andreas Eversberg and bumps the protocol version.
I added the missing mncc mappings from value to string.
[ 5cf8fb10ea3addcae74d37f4dbf1c1be664df53e protocol extension
5dac90de38990b188f499c602bf18a4f232070e8 payload extension]
Mike's patch included clean-ups I want to apply separately and
change them a bit. If we return from an else we don't need to
put the else.
* Try the E1 trunk first
* Then try a local virtual trunk
* Fail if none of the above returned
Remove the host portion of the endpoint Id. This requires less
configuration and we are probably fine to trust that MGCP only
received messages designated for it.
When using multiple interfaces on a system one can now configure
which will be served for the BTS ports and which will be served
for the network. The direct usage of source_addr is now only to
initialize the MGCP receiving port itself.
Make it possible to bind the call-agent to a specific IP address
and the network and bts end to different ip addresses. Begin by
clarifying which source ip address we want to have.
Use the existing ulaw encode/decode to support PCMU as well.
The MERA VoIP switch has some severe issues with the GSM codec
and it appears easier to enable transcoding for it.
The mera switch doesn't appear to cope with codec change
between a SIP 180 trying and the 200 ok connection result.
Inserting the codec is touching too many places. Ideally we
should have the transcoding function as pointer in the struct
as well but the arguments differ.. so it is not a direct way
forward.
Iridium is a satellite network which operates a GPRS-like that allows you to
get speeds up to 128kbit/s. However, it takes from 5 to 6 secs to get the
bandwidth allocated, so the conversation is garbled during the time.
This patch uses the new dummy padding support in libosmo-netif that is
controlled through the osmux osmux_xfrm_input_open_circuit().
This includes a new VTY option for osmux.
I guess none of our users knows what a mi_type=0x02 is, but most would
know what an IMSI or a TMSI is. So let's use the newly introduced
gsm48_mi_type_name() function to fix this.
For some odd reasons the XID is not a separate SAPI but has been kludged into
the GMM SAPI. This means we ahve to be careful not to dispatch XID frames into
GMM. We do this by introducing an explicit check for UI frames before the
dispatch to GMM.
The previous code already was doing "the right thing" but printed occasional
messages like "gprs_gmm.c:2082 Unknown GSM 04.08 discriminator 0x01: 01 00 0e
00 32 11 03 16 01 90 63 28 0b". Those should be gone after this patch.
Traffic cannot sent to BTS, if there is (currently) no logical channel
associated with the transaction.
This happens, if TCH traffic is received from upper layer, but there is
no lchan available before completing immediate assignment, handover or
assignment process.
[hfreyther: The code has not been moved to tch_frame_down
but the issue looks similiar]
The NAT sends an incomplete SDP file for the purpose of informing
the BSC about the remote IP/PORT early. The case of an incomplete
SDP file was not considered. Check if there is a codec and if not
skip it.
TODO: We need to have a better end-point life cycle test.
We have a lot of legacy that I am afraid to break. We have
everything in place to make a good codec selection (e.g. if
we can avoid transcoding, pick the one with best quality or
the lowest speed). Right now I have a specific case where
from all options I want to pick GSM. Guard the codec compat
check behind the disallow transcoding option to make sure
to not break legacy application.
First collect everything we know and the mapping. E.g. a genuis
could remap "3" to "AMR" so we only know the codecs once we are
at the end of the SDP file. Once we have collected everything we
can select the audio codecs. The current code is compatible in
that two codecs will be selected regardless of if they make any
sense or not.
mgcp_set_audio_info could re-use some of our codec information
but then the caller in the MGCP protocol needs to be updated as
well as we use the "I: GSM" information to derive the codec from
there.
The SDP file handling will get more complicated in terms of
codec selection so let's remove it from the protocol handling
before we start blowing it up in size.
The parsing code assumed that there will be a single payload
type and this assumption is clearly wrong. Forward all of the
payload types. The code is still only extracting the first
type from the list. The variable name has been renamed to
reflect this.
Using the talloc leak report we see that there are some msgb's
that are allocated for SMS but we don't have transactions or
SMS around. We need to improve the name of the messages to
uniquely dscribe where they are from but the obvious leak does
occur in this routine.
The no available transaction id is most likely the case where
we leak memory. This should not occur and shows another issue
with the smsqueue/smpp handling. It doesn't explain the subscr
reference count issue either.
Extract of the leak report:
GSM 04.11 contains 1160 bytes in 1 blocks (ref 0) 0x2517dc0
GSM 04.11 contains 1160 bytes in 1 blocks (ref 0) 0x24b56e0
GSM 04.11 contains 1160 bytes in 1 blocks (ref 0) 0x23e7930
In case the subscriber is currently busy we would omit the
subscr_put. This seems to be very hard to hit as the subscr
need to be active and at the same time be selected for the
purge operation.
Neels Hofmeyr
Alexander Couzens
Harald Welte
Dieter Spaar
Daniel Willmann
Alexander Huemer
Martin Hauke