The only reason to use int instead of the enum was the lack of header
iu_client.h when not building with Iu support. Rather use the configure result
properly, include the header when Iu support is built and use the proper enum.
Omit the entire iu sub-struct when building without Iu.
Add LIBOSMORANAP_CFLAGS to libvlr, in order to find the iu_client.h header (now
also included from gsm_data.h).
Rationale: Instead of using a questionable typecast from int* to enum*, we can
now use the enum member directly without needing to silence compiler warnings.
Change-Id: Ic9f8bf53f4b605c166e84cd7edd90c10fe7d7a1f
Instead of keeping separate enums for FSM results and translating between those
and the actual 04.08 reject causes that will ultimately reach the MS, just pass
enum gsm48_reject_value cause codes around everywhere.
Collapse some VLR *_timeout() and *_cancel() api to just *_cancel() with a
gsm48 cause arg.
(Hopefully) improve a few reject causes, but otherwise just aim for more
transparent decisions on which cause value is used, for future fixes of
returned causes.
Depends: I6661f139e68a498fb1bef10c266c2f064b72774a (libosmocore)
Change-Id: I27bf8d68737ff1f8dc6d11fb1eac3d391aab0cb1
When sending a BSSMAP Clear or Iu Release, do not immediately discard the conn,
but wait until a BSSMAP Clear Complete / Iu Release Complete has been received.
Hence we will no longer show in the log that an incoming Release/Clear Complete
belongs to an unknown subscriber, but will still be around to properly log the
release.
Related: OS#3122
Change-Id: Ie4c6aaba3866d6e5b98004e8870a215e8cf8ffc1
Refactor:
1. Glue the gsm_subscriber_connection alloc to the subscr_conn_fsm.
2. Add separate AUTH_CIPH state to the FSM.
3. Use conn->use_count to trigger conn release.
4. Add separate RELEASING state to the FSM.
5. Add rate counters for each of the three Complete Layer 3 types.
Details:
1. Glue the gsm_subscriber_connection alloc to the subscr_conn_fsm.
Historically, a gsm_subscriber_connection was allocated in libbsc land, and
only upon Complete Layer 3 did libmsc add the fsm instance. After splitting
openbsc.git into a separate osmo-msc, this is no longer necessary, hence:
Closely tie gsm_subscriber_connection allocation to the subscr_conn_fsm
instance: talloc the conn as a child of the FSM instance, and discard the conn
as soon as the FSM terminates.
2. Add separate AUTH_CIPH state to the FSM.
Decoding the Complete Layer 3 message is distinctly separate from waiting for
the VLR FSMs to conclude. Use the NEW state as "we don't know if this is a
valid message yet", and the AUTH_CIPH state as "evaluating, don't release".
A profound effect of this: should we for any odd reason fail to leave the FSM's
NEW state, the conn will be released right at the end of msc_compl_l3(),
without needing to trigger release in each code path.
3. Use conn->use_count to trigger conn release.
Before, the FSM itself would hold a use count on the conn, and hence we would
need to ask it whether it is ready to release the conn yet by dispatching
events, to achieve a use_count decrement.
Instead, unite the FSM instance and conn, and do not hold a use count by the
FSM. Hence, trigger an FSM "UNUSED" event only when the use_count reaches zero.
As long as use counts are done correctly, the FSM will terminate correctly.
These exceptions:
- The new AUTH_CIPH state explicitly ignores UNUSED events, since we expect the
use count to reach zero while evaluating Authentication and Ciphering. (I
experimented with holding a use count by AUTH_CIPH onenter() and releasing by
onleave(), but the use count and thus the conn are released before the next
state can initiate transactions that would increment the use count again.
Same thing for the VLR FSMs holding a use count, they should be done before
we advance to the next state. The easiest is to simply expect zero use count
during the AUTH_CIPH state.)
- A CM Service Request means that even though the MSC would be through with all
it wants to do, we shall still wait for a request to follow from the MS.
Hence the FSM holds a use count on itself while a CM Service is pending.
- While waiting for a Release/Clear Complete, the FSM holds a use count on
itself.
4. Add separate RELEASING state to the FSM.
If we decide to release for other reasons than a use count reaching zero, we
still need to be able to wait for the msc_dtap() use count on the conn to
release.
(An upcoming patch will further use the RELEASING state to properly wait for
Clear Complete / Release Complete messages.)
5. Add rate counters for each of the three Complete Layer 3 types.
Besides LU, also count CM Service Request and Paging Response
acceptance/rejections. Without these counters, only very few of the auth+ciph
outcomes actually show in the counters.
Related: OS#3122
Change-Id: I55feb379e176a96a831e105b86202b17a0ffe889
We usually put comments for functions in *.c files, while header
files are usually plain listings of the API without comments.
Change-Id: I6b0d1d9e1a1b1ffb71cb9905e74f6fad2333bb65
In the old days, OsmoNITB couldn't process any SMS that wasn't between
two subscribers on the same NITB.
We've long re-worked the internals in order to process SMS with
arbitrary sender MSISDN (e.g. from SMPP). However, the VTY command
"subscriber ... sms" was never updated, it seems.
Change-Id: I62b17e0a67989484415f0df2c8cb4ff1f94dbf2b
Closes: OS#3151
The DLCI field of the DTAP header indicates the SAPI as well as the
data link (main DCCH or SACCH). We must make sure to use the correct
DLCI when sending DTAP to the BSC.
We achieve this by
* storing the DLCI in the msgb->cb while parsing the DTAP header
* storing the received DLCI (from msgb->cb) in the transaction for
mobile-originated transactions
* using the trans->dlci to sent msgb->cb when transmitting L3
* filling the DTAP DLCI value from msgb->cb when transmitting DTAP
For MSC-originated transactions, we choose a DLCI value corresponding
to the service (SAPI=0 for CC, SAPI=3 for SMS) and store that in
trans->dlci.
Closes: OS#3150
Change-Id: If511b20f52575054cab1346d99a8cb68d827fdbf
The current msc_subscr_con_allocate() was in fact only used by msc_vlr_tests,
while both a_iface_bssap.c and iucs.c did their own duplicate code of
allocating the gsm_subscriber_connection struct. Unify.
Drop the old msc_subscr_con_allocate(), instead add msc_subscr_conn_alloc().
The new function also takes via_ran and lac arguments directly.
The conn allocation will soon be closely tied to the subscr_conn_fsm instance
allocation, so place the new function definition alongside the other
subscr_conn_fsm API, and match its naming ("conn").
Related: OS#3122
Change-Id: Ia57b42a149a43f9c370b1310e2e1f512183993ea
Instead of jumping through hoops to pass the Complete Layer 3 operation that
created this conn via FSM event dispatch parameters, put it right in the
gsm_subscriber_connection struct, where it always belonged.
Move definition of the enum complete_layer3_type to gsm_data.h, where
gsm_subscriber_connection is defined.
Introduce msc_subscr_conn_update_id() to set the complete_layer3_type of the
conn as soon as a Complete Layer 3 message is received.
In msc_subscr_conn_update_id(), already include an mi_string argument to
prepare for an upcoming patch where the FSM will be allocated much earlier when
the Mobile Identity is not known yet, and we'll also update the fi->id here.
The odd logging change in the msc_vlr_tests output uncovers a wrong use of the
osmo_fsm_inst_dispatch() data argument for SUBSCR_CONN_E_CN_CLOSE events: if a
child FSM signals unsuccessful result, instead of the failure cause, it passed
the complete_layer3_type, as requested upon FSM allocation, which was then
misinterpreted as a failure cause. Now a child FSM failure will pass NULL
instead, while other SUBSCR_CONN_E_CN_CLOSE events may still pass a valid cause
value.
Related: OS#3122
Change-Id: Iae30dd57a8861c4eaaf56999f872d4e635ba97fb
'subscr_conn_from' could mean anything: from what, RAN type? BSS identifier? MM
action? Clearly name it as the Complete Layer 3 kind it represents.
Related: OS#3122
Change-Id: I6263a80e6db01c2ca48df6c58b05e2fd19347057
Match osmo-bsc's naming of the subscriber connection's FSM instance; 'conn->fi'
makes more sense anyway than 'conn->conn_fsm'.
BTW, an upcoming commit will do away with the legacy from libbsc/libmsc duality
and firmly glue the conn allocation to the fi.
Related: OS#3122
Change-Id: If442f2ba78d9722b1065ec30c9a13f372b6a8caa
classmark_is_r99() is only used in gsm_04_08.c, move there as static.
rrlp_mode_* is only used in msc_vty.c, move there as static.
Move ran_type_names[] to msc_ifaces.c.
Change-Id: I5381c72af6841829fbc65940fd7d6f4d5cf583df
Drop tall_bsc_ctx; in mncc_sock_init(), talloc the mncc_sock_state from
gsm_network.
In tests or utils, move from using an extern tall_bsc_ctx to a local root
context pointer.
Change-Id: I92c252be1d1e7634f1653de47d37c99d77d9501c
Apply more concise logging categories in each main scope. The bulk goes to
msc_main.c, obviously, while tests and utils get a slimmed down bunch of
logging categories.
Change-Id: I969a0662ba273f3721b6820d02151b7a5b8014b8
From openbsc.git, we still have osmo-msc's VTY definitions spread across
various places. Combine:
- Move the go_parent_cb() and is_config_node() to msc_main.c, drop
common_vty.c.
- Move all of vty_interface_layer3.c into msc_vty.c.
- Move all of common_cs_vty.c into msc_vty.c.
- Move bsc_vty_init_extra() into msc_vty_init().
- Drop some unused definitions
No functional nor cosmetic changes have been made in the moved code, plain
copy-paste moving (even though the unidiff might look like edits in some
places). I might have adjusted some blank lines though.
Change-Id: Ia818c00ab613a19a34080b160d763b55c19f76b1
In trans_free(), call subscr_conn_release_when_unused(), so that we are sure to
clean up after the last transaction is done.
This fixes an error where a conn lingered after a CC failure, because that code
path forgot to trigger cleanup.
Rationale: so far we were triggering the release check after each DTAP dispatch
(compl_l3 and "normal" DTAP), which is sufficient for properly closed
transactions. We also need a check for when a timeout clears an erratic trans.
Adjust test expectation of test_call_mo_to_unknown_timeout to show that the
error is now fixed.
msc_vlr_test_reject_concurrency now sees an additional release checking event
when the SMS transaction is done, which is expected and does not affect the
test otherwise.
Related: OS#2779
Change-Id: I46ff2e9b09b67e4e0d79cccf8c04936f17281fcb
The naming of "bump" was short and made sense to me at the time of writing, but
it is keeping pretty much everyone else at a distance, no-one intuitively gets
what it is supposed to mean.
Clarify by renaming to "release_when_unused".
Adjust test expectations.
Change-Id: I4dcc55f536f63b13a3da29fff1df5fe16751f83a
osmo-msc still uses endpoints that are allocated locally by the
MGCP-Client. Since osmo-mgw now supports the more comfortable,
dynamic variant we should make use of it.
- Replace the endpoint numer allocation by the client with a
wildcarded CRCX. Use the endpoint that is assigned by the
MGW.
Related: OS#2710
Change-Id: Iee3e446b6689626516f01c521abe3d4603cd3e13
Since commit 2483f1b050 the function
gsm48_tx_mm_info() was not called anymore. No MM info messages were
transmitted to phones even if MM info messages were enabled via VTY.
With this commit, we call gsm48_tx_mm_info() after successfully
processing an IMSI ATTACH location update.
Change-Id: Ice5963d84253eb8c803cd2dfa8b25a4db5382827
Related: OS#2850
Define the struct vlr_ciph_result member .imeisv not as a char* but a char[] of
appropriate length, to avoid the need to point to external memory.
Thus fix a use-after-free in msc_cipher_mode_compl(), which defined the
imeisv[] buffer in a sub-scope within that function, so that the .imeisv
pointer was already invalid when fed to vlr_subscr_rx_ciph_res().
Did you notice that the commit summary rhymes?
Closes: OS#3053
Change-Id: I90cfb952a7dec6d104200872164ebadb25d0260d
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).
Depends: Id2240f7f518494c9df6c8bda52c0d5092f90f221 (libosmocore),
Ib7176b1d65a03b76f41f94bc9d3293a8a07d24c6 (libosmocore)
Change-Id: I82f0016d9512ee8722a3489a3cb4b6c704a271fc
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: Ibcd1cc38f170895305ae176a5574384c74a33939
The ID will include the type of connection (GERAN_A, UTRAN_IU) followed
by the SCCP conn_id.
This can be used for the fsm instance ID before we know the IMSI.
Change-Id: I4b875772e3994ad3458ee60dbf880604486d9afd
This is another left-over VTY command from the OsmoNITB days.
If such functionality is desired, it must be implemented in OsmoHLR,
but not here.
Related: OS#2528
Change-Id: Icf0897c47388e49ba7886b55acc728a6f7d213fe
OsmoMSC is using whatever reject cause is apropriate in the given
situation. This user-configurable reject cause only had relevance
in OsmoNITB, and hence it is an unused parameter that can be removed
in OsmoMSC.
Related: OS#2528
Change-Id: Ie1f39e706477aaf42051877b52d4b3ae1c5f138e
This belongs into the BSC and has no relevance in the MSC, as the MSC
has no clue about dynamic timeslots.
Related: OS#2528
Change-Id: Iaa41d22db81120572d4cd2c0c4c75d258947a42f
The mncc_rtp_create_pending and mncc_rtp_connect_pending members
were unused, let's remove them.
Related: OS#2528
Change-Id: I417e23ec53323ddd8e1e5d18952566fe8fd6ac24
As in GSM/3GPP networks emergency calls carry no explicit destination
number/address, add a VTY commadn to patch in some destination handler
in the EMERGENCY SETUP before delivering to [internal or external] MNCC.
Change-Id: I7c9f43ba312fadda2b9a9483b3cf50e4abca9599
Having all BSSAP related logs in the "DMSC" category is overly
generic, and dosn't provide useful granularity.
Change-Id: Id1e52dad03840dfd026fb23f3845a8771c8cc308
If the BSC is contacting us for the first time and sending a BSSMAP
RESET, then we should simply ACK that and transition into the
"connected" state, where connection-oriented and connectionless
procedures are permitted.
This patch is a bit large for such a seemingly simple behavioural
change, but the existing data model didn't permit a more
straight-forward implementation.
Change-Id: Ie67e7ed20a6c42afe99bafef96d85a4e083dd057
Closes: OS#2914
Using this argument we can create the state machine in the
"already connected" state, i.e. without starting an outbound
RESET procedure.
Change-Id: Ibf569d57300965cd47084fa0bff54aa67679e2a1
Check and handle gracefully any error which might appear in
osmo_gsup_encode() - mark corresponding functions with
warn_unused_result attribute to make sure this failure is always checked
against.
Change-Id: I4551212011fb0bd898c020a183756ed7a9afb9e5
Related: OS#2864
in the current implementation we still use osmo-bsc_mgcp, which
has many problems and is also obsoleted by osmo-mgw.
integrate osmo-mgw and re-implement the current switching using
an osmo fsm.
Depends: osmo-mgw Iab6a6038e7610c62f34e642cd49c93d11151252c
Depends: osmo-iuh I3c1a0455c5f25cae41ee19229d6daf299e023062
Closes: OS#2605
Change-Id: Ieea9630358b3963261fa1993cf1f3b563ff23538
conn_id is modeled as int, but should be uint32_t.
- change conn_id from int to uint32_t
Change-Id: Ibf14d7c9a547c4eeb873975e7dcddef223e7df46
Related: OS#2769
According to TS 24.007 Section 11.2.3.2.3, it is possible that uplink L3
messages are duplicated in some scenarios, particularly during
assignment/handover procedure.
To avoid L3 entities from seeing duplicated messages, there's a modulo-2
or modulo-4 message sequence counter, based on which the MSC can detect
and suppress such duplicate messages.
It appears that even our unit tests were wrong in that regard so far.
Rather than manually adjusting each and every message, let's make sure
that the sequence number generation always increments as expected, and
that during matching of incoming messages, sequence numbers are masked
out.
Note: the tests will only pass from libosmocore Change-Id
Iec875a77f5458322dfbef174f5abfc0e8c09d464 onwards, due to
gsm48_hdr_msg_type() being broken in earlier versions.
Change-Id: Id15e399ab7e1b05dcd426b292886fa19d36082b1
Closes: #2908
This leads to faster recovery in case of link loss.
It also makes the TTCN-3 test suite run much faster, as each test case
will inherently terminate the GSUP connection.
Change-Id: I16821a26f2c6ff4d0a76926c9212127ab6f6fedf
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.
NOTE: Like the previous code, OsmoMSC does *not yet check* whether
the configured cipher is compatible with the MS capabilities as
reported in CLASSMARK! The network hence might choose an algorithm
not supported by the phone. Fixing this is subject to another patch.
Closes: OS#2460
Change-Id: I79a4e2892eb5fbecc3d84e11dceffb7149db264b
The VLR code seems to have the assumption that there is one particular
algorithm to be used, as opposed to one of a set of algorithms.
What's missing is basically to decide when/where to pick the best
algorithm within the capabilities of the phone (classmark) and the
network configuration (net->a5_encryption_mask). So far, libvlr has no
notion of classmark. Rather, libmsc has.
Why does the VLR care about the particular algorithm at all? The VLR
should probably simply decide if it should use encryption or not, and if
so, the MSC will figure which algorithm to use.
Change-Id: I5ed80ca2086560a5975a758ec568a034a9a8ab89
Pau Espin
Neels Hofmeyr
Harald Welte
Philipp Maier
Daniel Willmann