lchan: Introduce T3109 handling for the release procedure
T3109 is started when the SACCH is deactivated. It is stopped when
the phones sends the DISC/UA/UM on LAPDm for the main signalling
link. In case of timeout the abnormal release procedure will be
initiated. Make sure to not issue the SACCH Deactivate twice to
avoid confusing the equipment.
This is still not fully spec compliant. In case of a timeout the
abnormal release handling will be started which involves starting
T3111+2. The error handling should be split out of the rf channel
release method, e.g. lchan_release should be called and check if
the channel release was already initiated.
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index 61b0911..dfe80c9 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -1379,7 +1379,7 @@
DECLARE_TIMER(3103, "Set the timeout value for HANDOVER.\n")
DECLARE_TIMER(3105, "Set the timer for repetition of PHYSICAL INFORMATION.\n")
DECLARE_TIMER(3107, "Currently not used.\n")
-DECLARE_TIMER(3109, "Currently not used.\n")
+DECLARE_TIMER(3109, "Set the RSL SACCH deactivation timeout.\n")
DECLARE_TIMER(3111, "Set the RSL timeout to wait before releasing the RF Channel.\n")
DECLARE_TIMER(3113, "Set the time to try paging a subscriber.\n")
DECLARE_TIMER(3115, "Currently not used.\n")