fix paging: add timeout to discard unsuccessful paging
Currently, if there is no reply from the BSS / RNC, a subscriber will remain as
"already paged" forever, and is never going to be paged again. Even on IMSI
Detach, the pending request will keep a ref count on the vlr_subscr.
Add a paging timeout, as gsm_network->paging_timeout and in the VTY on the
'msc' node as 'paging timeout (default|<1-65535>'. (There is a 'network' /
'T3113' in OsmoBSC, but to not confuse the two, give this a different name.)
Add test_ms_timeout_paging() test to verify the timeout works.
I hit this while testing Paging across multiple hNodeB, when a UE lost
connection to the hNodeB. I noticed that no matter how long I wait, no Paging
is sent out anymore, and found this embarrassing issue. Good grief...
The choice of 10 seconds is taken from https://osmocom.org/issues/2756
Change-Id: I2db6f1e2ad341cf9c2cc7a21ec2fca0bae5b2db5
diff --git a/src/libcommon-cs/common_cs.c b/src/libcommon-cs/common_cs.c
index bad8262..4748865 100644
--- a/src/libcommon-cs/common_cs.c
+++ b/src/libcommon-cs/common_cs.c
@@ -60,6 +60,8 @@
/* Use 30 min periodic update interval as sane default */
net->t3212 = 5;
+ net->paging_response_timer = MSC_PAGING_RESPONSE_TIMER_DEFAULT;
+
INIT_LLIST_HEAD(&net->trans_list);
INIT_LLIST_HEAD(&net->upqueue);
INIT_LLIST_HEAD(&net->subscr_conns);