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Handling E1 connection loss on CU-CP

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- it triggers the RRC callback after SCTP SHUTDOWN indication
- CUUP entity cleanup at RRC level
This commit is contained in:
Guido Casati
2024-01-25 17:10:52 +01:00
committed by Robert Schmidt
parent b9bfff3327
commit 45ca753b24
6 changed files with 52 additions and 0 deletions
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openair2/RRC/NR/nr_rrc_proto.h
+3
View File
@@ -129,6 +129,9 @@ sctp_assoc_t get_existing_cuup_for_ue(const gNB_RRC_INST *rrc, const gNB_RRC_UE_
sctp_assoc_t get_new_cuup_for_ue(const gNB_RRC_INST *rrc, const gNB_RRC_UE_t *ue, int sst, int sd);
int rrc_gNB_process_e1_setup_req(sctp_assoc_t assoc_id, e1ap_setup_req_t *req);
/* Process indication of E1 connection loss on CU-CP */
void rrc_gNB_process_e1_lost_connection(gNB_RRC_INST *rrc, e1ap_lost_connection_t *lc, sctp_assoc_t assoc_id);
void bearer_context_setup_direct(e1ap_bearer_setup_req_t *req,
instance_t instance);
openair2/RRC/NR/rrc_gNB.c
+4
View File
@@ -2476,6 +2476,10 @@ void *rrc_gnb_task(void *args_p) {
rrc_gNB_process_e1_bearer_context_release_cplt(&E1AP_BEARER_CONTEXT_RELEASE_CPLT(msg_p));
break;
case E1AP_LOST_CONNECTION: /* CUCP */
rrc_gNB_process_e1_lost_connection(RC.nrrrc[0], &E1AP_LOST_CONNECTION(msg_p), msg_p->ittiMsgHeader.originInstance);
break;
case NGAP_PAGING_IND:
rrc_gNB_process_PAGING_IND(msg_p, instance);
break;
openair2/RRC/NR/rrc_gNB_cuup.c
+25
View File
@@ -189,3 +189,28 @@ int rrc_gNB_process_e1_setup_req(sctp_assoc_t assoc_id, e1ap_setup_req_t *req)
return 0;
}
/**
* @brief RRC Processing of the indication of E1 connection loss on CU-CP
*/
void rrc_gNB_process_e1_lost_connection(gNB_RRC_INST *rrc, e1ap_lost_connection_t *lc, sctp_assoc_t assoc_id)
{
LOG_I(NR_RRC, "Received E1 connection loss indication on RRC\n");
AssertFatal(assoc_id != 0, "illegal assoc_id == 0: should be -1 (monolithic) or >0 (split)\n");
nr_rrc_cuup_container_t e = {.assoc_id = assoc_id};
nr_rrc_cuup_container_t *cuup = RB_FIND(rrc_cuup_tree, &rrc->cuups, &e);
if (cuup == NULL) {
LOG_W(NR_RRC, "CU-UP for assoc_id %d not found!\n", assoc_id);
return;
}
if (cuup->setup_req != NULL) {
e1ap_setup_req_t *req = cuup->setup_req;
LOG_I(NR_RRC, "releasing CU-UP %s on assoc_id %d\n", req->gNB_cu_up_name, assoc_id);
free(cuup->setup_req);
}
nr_rrc_cuup_container_t *removed = RB_REMOVE(rrc_cuup_tree, &rrc->cuups, cuup);
// Free relevant CU-UP structures
free(cuup);
DevAssert(removed != NULL);
rrc->num_cuups--;
}