Merge remote-tracking branch 'origin/fix-qfi-gtp' into integration_2024_w43 (!3067)

Bugfix: Fill QFI for N3 GTP messages

openair2/LAYER2/nr_pdcp/cucp_cuup_handler.c

@@ -157,6 +157,7 @@ void e1_bearer_context_setup(const e1ap_bearer_setup_req_t *req)
     AssertFatal(req_pdu->numDRB2Setup == 1, "can only handle one DRB per PDU session\n");
     resp_pdu->numDRBSetup = req_pdu->numDRB2Setup;
     const DRB_nGRAN_to_setup_t *req_drb = &req_pdu->DRBnGRanList[0];
+    AssertFatal(req_drb->numQosFlow2Setup == 1, "can only handle one QoS Flow per DRB\n");
     DRB_nGRAN_setup_t *resp_drb = &resp_pdu->DRBnGRanList[0];
     resp_drb->id = req_drb->id;
     resp_drb->numQosFlowSetup = req_drb->numQosFlow2Setup;
@@ -168,7 +169,7 @@ void e1_bearer_context_setup(const e1ap_bearer_setup_req_t *req)
 
     // GTP tunnel for N3/to core
     gtpv1u_gnb_create_tunnel_resp_t resp_n3 = {0};
-    int qfi = 0; // put PDU session marker
+    int qfi = req_drb->qosFlows[0].qfi;
     int ret = drb_gtpu_create(n3inst,
                               cu_up_ue_id,
                               req_drb->id,