Ignore invalid function codes sent to other servers

debevv · Dec 13, 2024 · c81ad17 · c81ad17
1 parent a1705c0
commit c81ad17
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/nanomodbus.c b/nanomodbus.c
@@ -1878,7 +1878,8 @@ static nmbs_error handle_req_fc(nmbs_t* nmbs) {
 #endif
         default:
             flush(nmbs);
-            err = send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
+            if (!nmbs->msg.ignored && !nmbs->msg.broadcast)
+                err = send_exception_msg(nmbs, NMBS_EXCEPTION_ILLEGAL_FUNCTION);
     }
 
     return err;