Validate BWP switch

Return from triggering reconfiguration with BWP switch if BWP is the
same as before the switch, and add check to verify if BWP triggered by
switch command exists

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -3922,14 +3922,32 @@ bool nr_mac_check_ul_failure(gNB_MAC_INST *nrmac, int rnti, NR_UE_sched_ctrl_t *
   return false;
 }
 
+static bool verify_bwp_switch(const NR_UE_info_t *UE, const nr_mac_config_t *configuration, int new_bwp_id)
+{
+  if (new_bwp_id == UE->current_DL_BWP.bwp_id) {
+    LOG_E(NR_MAC, "Source BWP ID and target BWP ID are the same, can't perform switch\n");
+    return false;
+  }
+
+  if (new_bwp_id == 0)
+    return true;
+  for (int i = 0; i < configuration->num_additional_bwps; i++) {
+    const nr_bwp_config_t *bwp_config = &configuration->bwp_config[i];
+    if (bwp_config->id == new_bwp_id)
+      return true;
+  }
+  LOG_E(NR_MAC, "New BWP %d does not belong to the list of configured BWPs, can't perform switch\n", new_bwp_id);
+  return false;
+}
+
 void nr_mac_trigger_reconfiguration(const gNB_MAC_INST *nrmac, NR_UE_info_t *UE, int new_bwp_id)
 {
   DevAssert(UE->CellGroup != NULL);
   NR_CellGroupConfig_t *cellGroup_for_UE = NULL;
   if (new_bwp_id >= 0) {
     AssertFatal(UE->current_DL_BWP.bwp_id == UE->current_UL_BWP.bwp_id, "We only support same BWP for UL and DL\n");
-    if (new_bwp_id == UE->current_DL_BWP.bwp_id)
-      LOG_E(NR_MAC, "Source BWP ID and target BWP ID are the same, can't perform switch\n");
+    if (!verify_bwp_switch(UE, &nrmac->radio_config, new_bwp_id))
+      return;
     else {
       UE->sc_info.csi_MeasConfig = NULL;  // to avoid segfault when freeing csi_MeasConfig in configDedicated
       cellGroup_for_UE = update_cellGroupConfig_for_BWP_switch(UE->CellGroup,