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authorNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-02-15 00:20:44 +0100
committerNeels Hofmeyr <nhofmeyr@sysmocom.de>2017-03-16 15:32:29 +0100
commitac5f9276c443c01f0cf1f4dc6d04ba1d2b09d422 (patch)
treee2b2968a590833d802adb487c54ace16862eee0a /openbsc/include
parentd36144d6c98bfcf4db106a4596f4238524ec3eab (diff)
vlr: get SMS working, by SMS recipient MSISDN round-robin
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. Change-Id: I1acf9debb6ba9164e6edcfd5bc5e48e8c98f2b01
Diffstat (limited to 'openbsc/include')
-rw-r--r--openbsc/include/openbsc/db.h11
1 files changed, 8 insertions, 3 deletions
diff --git a/openbsc/include/openbsc/db.h b/openbsc/include/openbsc/db.h
index 660451a50..988c9bd6e 100644
--- a/openbsc/include/openbsc/db.h
+++ b/openbsc/include/openbsc/db.h
@@ -38,9 +38,14 @@ int db_fini(void);
/* SMS store-and-forward */
int db_sms_store(struct gsm_sms *sms);
struct gsm_sms *db_sms_get(struct gsm_network *net, unsigned long long id);
-struct gsm_sms *db_sms_get_unsent(struct gsm_network *net, unsigned long long min_id);
-struct gsm_sms *db_sms_get_unsent_by_subscr(struct gsm_network *net, unsigned long long min_subscr_id, unsigned int failed);
-struct gsm_sms *db_sms_get_unsent_for_subscr(struct vlr_subscr *vsub);
+struct gsm_sms *db_sms_get_next_unsent(struct gsm_network *net,
+ unsigned long long min_sms_id,
+ unsigned int max_failed);
+struct gsm_sms *db_sms_get_next_unsent_rr_msisdn(struct gsm_network *net,
+ const char *last_msisdn,
+ unsigned int max_failed);
+struct gsm_sms *db_sms_get_unsent_for_subscr(struct vlr_subscr *vsub,
+ unsigned int max_failed);
int db_sms_mark_delivered(struct gsm_sms *sms);
int db_sms_inc_deliver_attempts(struct gsm_sms *sms);
int db_sms_delete_by_msisdn(const char *msisdn);