Refactor E1 UE removal in separate function

Refactor into remove_ue_e1(), to be used in the next commit, independent
of e1_bearer_release_cmd().

openair2/LAYER2/nr_pdcp/cucp_cuup_handler.c

@@ -300,24 +300,28 @@ void e1_bearer_context_modif(const e1ap_bearer_mod_req_t *req)
   get_e1_if()->bearer_modif_response(&modif);
 }
 
-void e1_bearer_release_cmd(const e1ap_bearer_release_cmd_t *cmd)
+static void remove_ue_e1(const uint32_t ue_id)
 {
   bool need_ue_id_mgmt = e1_used();
 
   instance_t n3inst = get_n3_gtp_instance();
   instance_t f1inst = get_f1_gtp_instance();
 
-  LOG_I(E1AP, "releasing UE %d\n", cmd->gNB_cu_up_ue_id);
-
-  newGtpuDeleteAllTunnels(n3inst, cmd->gNB_cu_up_ue_id);
+  newGtpuDeleteAllTunnels(n3inst, ue_id);
   if (f1inst >= 0)  // is there F1-U?
-    newGtpuDeleteAllTunnels(f1inst, cmd->gNB_cu_up_ue_id);
+    newGtpuDeleteAllTunnels(f1inst, ue_id);
   if (need_ue_id_mgmt) {
     // see issue #706: in monolithic, gNB will free PDCP of UE
-    nr_pdcp_remove_UE(cmd->gNB_cu_up_ue_id);
-    cu_remove_f1_ue_data(cmd->gNB_cu_up_ue_id);
+    nr_pdcp_remove_UE(ue_id);
+    cu_remove_f1_ue_data(ue_id);
   }
-  nr_sdap_delete_ue_entities(cmd->gNB_cu_up_ue_id);
+  nr_sdap_delete_ue_entities(ue_id);
+}
+
+void e1_bearer_release_cmd(const e1ap_bearer_release_cmd_t *cmd)
+{
+  LOG_I(E1AP, "releasing UE %d\n", cmd->gNB_cu_up_ue_id);
+  remove_ue_e1(cmd->gNB_cu_up_ue_id);
 
   e1ap_bearer_release_cplt_t cplt = {
     .gNB_cu_cp_ue_id = cmd->gNB_cu_cp_ue_id,