Iu: implement a user inactivity timer
The user inactivity timer is similiar to the Gb READY timer and reduces
the resources taken by an idle UE.
Change-Id: I66c2ac0350cb074aefd9a22c5121acf723f239d3
diff --git a/src/sgsn/gprs_mm_state_iu_fsm.c b/src/sgsn/gprs_mm_state_iu_fsm.c
index b098f20..e6b80d7 100644
--- a/src/sgsn/gprs_mm_state_iu_fsm.c
+++ b/src/sgsn/gprs_mm_state_iu_fsm.c
@@ -12,7 +12,8 @@
static const struct osmo_tdef_state_timeout mm_state_iu_fsm_timeouts[32] = {
[ST_PMM_DETACHED] = { },
- [ST_PMM_CONNECTED] = { },
+ /* non-spec -T3314 (User inactivity timer) */
+ [ST_PMM_CONNECTED] = { .T=-3314 },
[ST_PMM_IDLE] = { },
};
@@ -47,6 +48,10 @@
static void st_pmm_connected(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct sgsn_mm_ctx *ctx = fi->priv;
+ const struct RANAP_Cause user_inactive_cause = {
+ .present = RANAP_Cause_PR_radioNetwork,
+ .choice.radioNetwork = RANAP_CauseRadioNetwork_user_inactivity,
+ };
switch(event) {
case E_PMM_PS_CONN_RELEASE:
@@ -57,6 +62,10 @@
sgsn_ranap_iu_release_free(ctx, NULL);
mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED);
break;
+ case E_PMM_USER_INACTIVITY:
+ sgsn_ranap_iu_release_free(ctx, &user_inactive_cause);
+ mm_state_iu_fsm_state_chg(fi, ST_PMM_DETACHED);
+ break;
case E_PMM_RA_UPDATE:
break;
}
@@ -81,6 +90,18 @@
}
}
+static int pmm_state_fsm_timer_cb(struct osmo_fsm_inst *fi)
+{
+ switch(fi->state) {
+ case ST_PMM_CONNECTED:
+ /* timer for pmm state. state=CONNECTED: -T3314 (User inactivity timer) */
+ osmo_fsm_inst_dispatch(fi, E_PMM_USER_INACTIVITY, NULL);
+ break;
+ }
+
+ return 0;
+}
+
static struct osmo_fsm_state mm_state_iu_fsm_states[] = {
[ST_PMM_DETACHED] = {
.in_event_mask = X(E_PMM_PS_ATTACH) | X(E_PMM_IMPLICIT_DETACH),
@@ -89,7 +110,8 @@
.action = st_pmm_detached,
},
[ST_PMM_CONNECTED] = {
- .in_event_mask = X(E_PMM_PS_CONN_RELEASE) | X(E_PMM_RA_UPDATE) | X(E_PMM_IMPLICIT_DETACH),
+ .in_event_mask = X(E_PMM_PS_CONN_RELEASE) | X(E_PMM_RA_UPDATE)
+ | X(E_PMM_IMPLICIT_DETACH) | X(E_PMM_USER_INACTIVITY),
.out_state_mask = X(ST_PMM_DETACHED) | X(ST_PMM_IDLE),
.name = "Connected",
.action = st_pmm_connected,
@@ -109,6 +131,7 @@
OSMO_VALUE_STRING(E_PMM_PS_CONN_ESTABLISH),
OSMO_VALUE_STRING(E_PMM_IMPLICIT_DETACH),
OSMO_VALUE_STRING(E_PMM_RA_UPDATE),
+ OSMO_VALUE_STRING(E_PMM_USER_INACTIVITY),
{ 0, NULL }
};