ENDC path switch S1-U: Adding GTP-U tunnel related functionality at gNB

openair2/RRC/LTE/rrc_eNB_GTPV1U.c

@@ -93,6 +93,56 @@ rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
   }
 }
 
+
+int
+rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
+  const protocol_ctxt_t *const ctxt_pP,
+  const gtpv1u_enb_create_tunnel_resp_t *const create_tunnel_resp_pP,
+  uint8_t                         *inde_list
+) {
+  rnti_t                         rnti;
+  int                            i;
+  struct rrc_gNB_ue_context_s   *ue_context_p = NULL;
+
+  if (create_tunnel_resp_pP) {
+    LOG_D(RRC, PROTOCOL_RRC_CTXT_UE_FMT" RX CREATE_TUNNEL_RESP num tunnels %u \n",
+          PROTOCOL_RRC_CTXT_UE_ARGS(ctxt_pP),
+          create_tunnel_resp_pP->num_tunnels);
+    rnti = create_tunnel_resp_pP->rnti;
+    ue_context_p = rrc_gNB_get_ue_context(
+                     RC.nrrrc[ctxt_pP->module_id],
+                     ctxt_pP->rnti);
+
+    for (i = 0; i < create_tunnel_resp_pP->num_tunnels; i++) {
+      ue_context_p->ue_context.gnb_gtp_teid[inde_list[i]]  = create_tunnel_resp_pP->enb_S1u_teid[i];
+      ue_context_p->ue_context.gnb_gtp_addrs[inde_list[i]] = create_tunnel_resp_pP->enb_addr;
+      ue_context_p->ue_context.gnb_gtp_ebi[inde_list[i]]   = create_tunnel_resp_pP->eps_bearer_id[i];
+      LOG_I(RRC, PROTOCOL_RRC_CTXT_UE_FMT" rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP tunnel (%u, %u) bearer UE context index %u, msg index %u, id %u, gtp addr len %d \n",
+            PROTOCOL_RRC_CTXT_UE_ARGS(ctxt_pP),
+            create_tunnel_resp_pP->enb_S1u_teid[i],
+            ue_context_p->ue_context.gnb_gtp_teid[inde_list[i]],
+            inde_list[i],
+	    i,
+            create_tunnel_resp_pP->eps_bearer_id[i],
+	    create_tunnel_resp_pP->enb_addr.length);
+    }
+
+	MSC_LOG_RX_MESSAGE(
+			  MSC_RRC_ENB,
+			  MSC_GTPU_ENB,
+			  NULL,0,
+			  MSC_AS_TIME_FMT" CREATE_TUNNEL_RESP RNTI %"PRIx16" ntuns %u ebid %u enb-s1u teid %u",
+			  0,0,rnti,
+			  create_tunnel_resp_pP->num_tunnels,
+			  ue_context_p->ue_context.gnb_gtp_ebi[0],
+			  ue_context_p->ue_context.gnb_gtp_teid[0]);
+        (void)rnti; /* avoid gcc warning "set but not used" */
+    return 0;
+  } else {
+    return -1;
+  }
+}
+
 //------------------------------------------------------------------------------
 boolean_t
 gtpv_data_req(

openair2/RRC/LTE/rrc_eNB_GTPV1U.h

@@ -43,6 +43,13 @@ rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
   uint8_t                         *inde_list
 );
 
+int
+rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
+  const protocol_ctxt_t *const ctxt_pP,
+  const gtpv1u_enb_create_tunnel_resp_t *const create_tunnel_resp_pP,
+  uint8_t                         *inde_list
+);
+
 /*! \fn rrc_eNB_send_GTPV1U_ENB_DELETE_TUNNEL_REQ(module_id_t enb_mod_idP, const rrc_eNB_ue_context_t* const ue_context_pP)
  *\brief Send GTPV1U_ENB_DELETE_TUNNEL_REQ message to GTPV1U to destroy all UE-related tunnels.
  *\param module_id Instance ID of eNB.

openair2/RRC/NR/nr_rrc_defs.h

@@ -326,9 +326,9 @@ typedef struct gNB_RRC_UE_s {
   uint8_t                            nb_release_of_e_rabs;
   e_rab_failed_t                     e_rabs_release_failed[S1AP_MAX_E_RAB];
   // LG: For GTPV1 TUNNELS
-  uint32_t                           enb_gtp_teid[S1AP_MAX_E_RAB];
+  uint32_t                           gnb_gtp_teid[S1AP_MAX_E_RAB];
-  transport_layer_addr_t             enb_gtp_addrs[S1AP_MAX_E_RAB];
+  transport_layer_addr_t             gnb_gtp_addrs[S1AP_MAX_E_RAB];
-  rb_id_t                            enb_gtp_ebi[S1AP_MAX_E_RAB];
+  rb_id_t                            gnb_gtp_ebi[S1AP_MAX_E_RAB];
 #endif
   uint32_t                           ul_failure_timer;
   uint32_t                           ue_release_timer;

openair2/RRC/NR/rrc_gNB_nsa.c

@@ -166,12 +166,11 @@ void rrc_add_nsa_user(gNB_RRC_INST *rrc,struct rrc_gNB_ue_context_s *ue_context_
 				  ctxt.instance,
 				  &create_tunnel_req,
 				  &create_tunnel_resp);
-		  rrc_eNB_process_GTPV1U_CREATE_TUNNEL_RESP(
+		  rrc_gNB_process_GTPV1U_CREATE_TUNNEL_RESP(
 				  &ctxt,
 				  &create_tunnel_resp,
 				  &inde_list[0]);
 		  X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).nb_e_rabs_admitted_tobeadded = m->nb_e_rabs_tobeadded;
-
 		  for(int i=0; i<ue_context_p->ue_context.nb_of_e_rabs; i++){
 			  X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].e_rab_id = ue_context_p->ue_context.e_rab[i].param.e_rab_id;
 			  X2AP_ENDC_SGNB_ADDITION_REQ_ACK(msg).e_rabs_admitted_tobeadded[i].gtp_teid = create_tunnel_resp.enb_S1u_teid[i];