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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 development collapsed in one patch. The original
history may still be available as branch neels/vlr_orig.
TODO: This commit may be split in several smaller changes before merging to
master.
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.
Related: OS#1592
Change-Id: I702ba504ce2de93507312c28eca8d11f09f4ee8b
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Use new function available in libosmocore to set up timers. Compile
tested only.
Change-Id: Ibcfd915688e97d370a888888a83a7c95cbe16819
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One logged the wrong function name. Add others.
Change-Id: Ied5d8e84d5d192c826bc131be8907eaa55190479
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Currently every subcriber object directly refers to the gsm_network
which contains a flag shared by every related subscriber
(keep_subscr). This adds a dependency on gsm_network even if only the
function defined in gsm_subscriber_base.c are used.
This patch adds a new struct gsm_subscriber_group which contains the
keep_subscr flag and a back reference to the network object. The
latter is not dereferenced in gsm_subscriber_base.c, so it can safely
be set to NULL when only that part of the gsm_subscriber API is being
used. It also changes that API to use gsm_subscriber_group instead of
gsm_network parameters.
Since there are some places where a pointer to the gsm_network is
needed but where only a gsm_subscriber is available, a 'net' back
pointer is added to the group struct, too. Nevertheless subscr group
and network could be separated completely, but this is not the topic
of this commit.
Sponsored-by: On-Waves ehf
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When one SMS has been delivered check if a second SMS can be scheduled
to that subscriber. If nothing can be scheduled kick the normal SMS queue
as one slot has become free now. Otherwise send the SMS and create a
pending entry.
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It was possible that two SMS would be delivered at the same time
which violates GSM 04.11. We should solely rely on the sms queue
to schedule more SMS to the subscriber.
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It is a bad idea to detach a subscriber. The subscriber will not
be reachable until the next periodic updating cycle. In case we have
too many failed deliveries we will need to reduce the period for the
LU and implement a subscriber purging task.
This is a preparation for the 29C3 and a problem Jolly experience with
his type writer system.
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It was possible to set the LAC=0 on a subscriber that just has
done a LU because it did not respond to a paging request.
E.g. when a phone is rebooting, a SMS being delivered, the phone
is doing the LU, sub_ready_for_sm will try to send a SMS (but the
phone is not ready yet and it will timeout), then the paging code will
send us an expiration note and we might set the LAC=0 for this
subscriber.
Ideally we would be able to stop the paging request once the subscriber
is authenticated and then hand this to the SMS layer, right now the
best thing to do is to detect that we will run into this problem and
not send the SMS, not try to set the LAC=0.
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Summary of changes:
s/signal_cbfn/osmo_signal_cbfn/g
s/register_signal_handler/osmo_signal_register_handler/g
s/unregister_signal_handler/osmo_signal_unregister_handler/g
s/dispatch_signal/osmo_signal_dispatch/g
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Summary of changes:
s/struct timer_list/struct osmo_timer_list/g
s/bsc_add_timer/osmo_timer_add/g
s/bsc_schedule_timer/osmo_timer_schedule/g
s/bsc_del_timer/osmo_timer_del/g
s/bsc_timer_pending/osmo_timer_pending/g
s/bsc_nearest_timer/osmo_timers_nearest/g
s/bsc_prepare_timers/osmo_timers_prepare/g
s/bsc_update_timers/osmo_timers_update/g
s/bsc_timer_check/osmo_timers_check/g
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libosmogsm is a new library that is distributed in the libosmocore.
Now, openbsc depends on it. This patch gets openbsc with this
change.
This patch also rewrites all include path to the new
osmocom/[gsm|core]
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
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... and make sure tests work again after restructuring
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