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Change handling the PDU connectivity reject #568 

If MME received the PDU connectivity reject, MME will not release UE
context to accept further service request
This commit is contained in:
Sukchan Lee 2020-10-31 22:42:49 -04:00
parent f137d1947f
commit 5fd6dac961
1 changed files with 17 additions and 3 deletions
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20
src/mme/mme-sm.c
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@ -420,11 +420,25 @@ void mme_state_operational(ogs_fsm_t *s, mme_event_t *e)
mme_sess_remove(sess);
} else if (OGS_FSM_CHECK(&bearer->sm, esm_state_exception)) {
/* Remove Session Context */
mme_sess_remove(sess);
/*
* [Enhancement] - Probably Invalid APN
* At this point, we'll forcely release UE context
* The UE requested the wrong APN.
*
* From the Issues #568, MME need to accept further service request.
* To do this, we are not going to release UE context.
*/
mme_send_delete_session_or_mme_ue_context_release(mme_ue);
enb_ue_t *enb_ue = enb_ue_cycle(mme_ue->enb_ue);
if (enb_ue) {
s1ap_send_ue_context_release_command(enb_ue,
S1AP_Cause_PR_nas, S1AP_CauseNas_normal_release,
S1AP_UE_CTX_REL_S1_REMOVE_AND_UNLINK, 0);
} else {
ogs_warn("[%s] No S1 Context", mme_ue->imsi_bcd);
}
}
ogs_pkbuf_free(pkbuf);