paging: Introduce a GSM_PAGING_BUSY event for a special timeout
Start counting the attempts of each paging request and call
the callback with the PAGING_BUSY type when the paging request
timed out but the subscriber was not paged at all. This can
only happen with a huge paging backlog.
In case the system has so many pending paging
diff --git a/openbsc/src/gsm_04_11.c b/openbsc/src/gsm_04_11.c
index c46f772..4ef9ee7 100644
--- a/openbsc/src/gsm_04_11.c
+++ b/openbsc/src/gsm_04_11.c
@@ -1126,6 +1126,7 @@
break;
case GSM_PAGING_EXPIRED:
case GSM_PAGING_OOM:
+ case GSM_PAGING_BUSY:
sms_free(sms);
rc = -ETIMEDOUT;
break;