So far, sms_pending_failed() starts a new sms_queue_trigger() run. The
intention behind that might have been to fill up the queue when sending SMS has
failed, but the practical effect is actually bad:
As current ttcn3-msc-test runs show, a failed MT SMS gets triggered multiple
times in short succession, i.e. osmo-msc repeatedly sends Paging Requests for
the same subscriber.
This special case happens actually only when there are few SMS still in the DB
to be delivered. In the TTCN3 test, there is exactly one MT SMS for one
subscriber, and retriggering the queue brings up the same SMS every time.
See f_tc_lu_and_mt_sms_paging_and_nothing() and f_tc_sgsap_mt_sms_and_nothing()
which say:
"/* Expect the MSC to page exactly 10 times before giving up */"
This is bad because an MSC should send a Paging Request exactly once. Retrying
failed Paging is clearly the task of the BSC, not the MSC. The remaining code
around Paging correctly follows this paradigm, but this retrigger doesn't.
Do not immediately trigger the SMS queue on a failed MT SMS. Instead, leave it
up to the periodical SMS queue trigger to decide.
This patch will cause the MT SMS tests in ttcn3-msc-tests to fail, because the
test expectations are bogus. The patch fixing the test run is listed 'Related'
below.
Related: I7dce12942a65eaaf97f78ca69401c7f93faacb9e (osmo-ttcn3-hacks)
Change-Id: I24bf9f1c1167efe1080ae4cf47ed2ef0bd981e49
If subscriber is NULL, vlr_subscr_msisdn_or_name() returns string
"unknown", which is less informative than printing destination msisdn
expected for the queued sms.
This happens for instance if an sms was queued with Store&Forward and
destination subscriber is not currently registered
Change-Id: I4b8b54c9c41b17d4e1fa7ece63aa91a98036ef11
A memleak has been noticed after executing some of TTCN-3 test
cases. For example, the following ones:
- MSC_Tests.TC_lu_and_mo_sms,
- MSC_Tests.TC_lu_and_mt_sms.
The key point is that MSC_Tests.TC_lu_and_mo_sms basically sends
a MO SMS to a non-attached subscriber with MSISDN 12345, so this
message is getting stored in the SMSC's database.
As soon as the SMSC's queue is triggered, sms_submit_pending() would
retrieve pending messages from the database by calling function
smsq_take_next_sms() in loop and attempt to deliver them.
This function in it's turn checks whether the subscriber is attached
or not. If not, the allocated 'gsm_sms' structure would not be
free()ed! Therefore, every time smsq_take_next_sms() is called,
one 'gsm_sms' structure for an unattached subscriber is leaked.
Furthermore, there is a unit test called 'sms_queue_test', that
actually does cover smsq_take_next_sms() and was designed to
catch some potential memory leaks, but...
In order to avoid emulating the low-level SQLite API, the unit
test by design overwrites some functions of libmsc, including
db_sms_get_next_unsent_rr_msisdn(), that is being called by
smsq_take_next_sms().
The problem is that the original function in libmsc does
allocate a 'gsm_sms' structure on heap (using talloc), while
the overwriting function did this statically, returning a
pointer to stack. This critical difference made it impossible
to spot the memleak in smsq_take_next_sms() during the
unit test execution.
Let's refactor 'sms_queue_test' to use dynamic memory allocation,
and finally fix the evil memleak in smsq_take_next_sms().
Change-Id: Iad5e4d84d8d410ea43d5907e9ddf6e5fdb55bc7a
Closes: OS#3860
gsm_subscriber.h contains some legacy cruft, part of which is that the VLR's
max MSISDN length should rather be defined in vlr.h. Same for GSM_NAME_LENGTH
-> VLR_NAME_LENGTH.
Adjust some sms_queue stuff that anyway includes vlr.h already.
Drop gsm_subscriber.h from vlr.h.
Add other (more concise) includes that thus become necessary, since the include
chain vlr.h->gsm_subscriber.h->gsm_data.h is no longer in place.
Change-Id: Iab5c507ec04fc2884187cf946f6ae2240e4a31f8
According to GSM TS 04.11, the SMC (Short Message Control) state
machine is a part of CM-sublayer of L3, that is responsible for
connection management (establisment and releasing), and SM-RP
(Relay Protocol) message delivery.
For some reason, the connection establisment request from SMC
(GSM411_MMSMS_EST_REQ) was not handled properly - it was
always assumed that connection is already established.
This is why the code initiating a MT (Mobile Terminated) SMS
transfer had to establish a radio connection with subscriber
manually.
Let's benefit from having the SMC state machine, and offload
connection establishment to it. This change makes the local
implementation closer to GSM TS 04.11, and facilitates the
further integration of GSUP transport.
NOTE: the expected unit test output is changed, because now we
always allocate a transaction first, and then establish a
connection, not vice versa.
Change-Id: I4a07ece80d8dd40b23da6bb1ffc9d3d745b54092
This bug is super obvious: We cannot first call
sms_pending_free(pending) and then in the next line still dereference
the pending->sms_id member.
This bug was introduced in January with Change-Id: I3749855fe25d9d4e37ec96b0c2bffbc692b66a78
and apparently nobody has tested any MT-SMS with asan enabled since?
Change-Id: Ibf17f270cdeb8153036eda3de274dd163bbff7e6
Closes: OS#3152
We don't usually put space before in-place increment or decrement. Let's
make code look similar to other Osmocom projects.
Change-Id: I5962431ad16c97e412939dc1b8949f6361a5c26e
Using following semantic patch:
@@ expression A, B, C; @@
- osmo_strlcpy(A, B, sizeof(A));
+ OSMO_STRLCPY_ARRAY(A, B);
Which was applied using following command:
spatch --dir src -I src --sp-file strlcpy.spatch --in-place --recursive-includes
All the calls to osmo_strlcpy() which use destination buffer obtained
via sizeof() were replaced with the corresponding wrapper macro.
Change-Id: I67b482dedfa11237ac21894fc5930039e12434ab
Related: OS#2864
Delete expired SMS whenever we are done processing an SMS-related signal.
In order to minimize additional latency only one SMS is removed at a time.
Change-Id: I56cbe716e52b679c4b94f6cbb4a171306975be2e
Related: OS#2354
We already delete SMS which have been sent successfully. However, there
are plans to accept SMS for any subscriber in order to fix the problem
described in https://osmocom.org/issues/2354 ("SMSC: Store&Forward not
working for subscribed but unregistered MS").
This means we may end up storing SMS which never get sent, e.g. because
the B subscriber doesn't actually exist. This could lead to a higher
degree of SMS database growth over time, and therefore we need a way
to keep database size under control.
As a first step, introduce a DB function which removes an expired SMS,
and add a VTY command which removes all expired SMS from the DB.
Later commits will build upon this to remove expired SMS automatically.
The SMS expiry time period is currently hard-coded to 2 weeks.
We could make this configurable in the future if desired.
Change-Id: Icd6093b7b5d8db84b19a0aa47c68182566113ee2
Related: OS#2354
osmo-msc still had large amounts of dead code that came along from
openbsc.git. This commit removes a lot of it, mostly stuff relevant
only to the BSC side of things (or even GPRS).
Change-Id: I247def85da2dc3ec461389fb74414a0d964e7e3c
Related: OS#2528
Currently the SMS database keeps accumulating entries for each SMS.
These entries are never deleted automatically. With this change, we
start deleting SMS which have successfully been sent to subscriber B.
Change-Id: I3749855fe25d9d4e37ec96b0c2bffbc692b66a78
Original libvlr code is by Harald Welte <laforge@gnumonks.org>,
polished and tweaked by Neels Hofmeyr <nhofmeyr@sysmocom.de>.
This is a long series of trial-and-error development collapsed in one patch.
This may be split in smaller commits if reviewers prefer that. If we can keep
it as one, we have saved ourselves the additional separation work.
SMS:
The SQL based lookup of SMS for attached subscribers no longer works since the
SQL database no longer has the subscriber data. Replace with a round-robin on
the SMS recipient MSISDNs paired with a VLR subscriber RAM lookup whether the
subscriber is currently attached.
If there are many SMS for not-attached subscribers in the SMS database, this
will become inefficient: a DB hit returns a pending SMS, the RAM lookup will
reveal that the subscriber is not attached, after which the DB is hit for the
next SMS. It would become more efficient e.g. by having an MSISDN based hash
list for the VLR subscribers and by marking non-attached SMS recipients in the
SMS database so that they can be excluded with the SQL query already.
There is a sanity limit to do at most 100 db hits per attempt to find a pending
SMS. So if there are more than 100 stored SMS waiting for their recipients to
actually attach to the MSC, it may take more than one SMS queue trigger to
deliver SMS for subscribers that are actually attached.
This is not very beautiful, but is merely intended to carry us over to a time
when we have a proper separate SMSC entity.
Introduce gsm_subscriber_connection ref-counting in libmsc.
Remove/Disable VTY and CTRL commands to create subscribers, which is now a task
of the OsmoHLR. Adjust the python tests accordingly.
Remove VTY cmd subscriber-keep-in-ram.
Use OSMO_GSUP_PORT = 4222 instead of 2222. See
I4222e21686c823985be8ff1f16b1182be8ad6175.
So far use the LAC from conn->bts, will be replaced by conn->lac in
Id3705236350d5f69e447046b0a764bbabc3d493c.
Related: OS#1592 OS#1974
Change-Id: I639544a6cdda77a3aafc4e3446a55393f60e4050
This is the first step in creating this repository from the legacy openbsc.git.
Like all other Osmocom repositories, keep the autoconf and automake files in
the repository root. openbsc.git has been the sole exception, which ends now.
Change-Id: I9c6f2a448d9cb1cc088cf1cf6918b69d7e69b4e7
Neels Hofmeyr
Pau Espin
Harald Welte