Replace static node values with random updates every second

Remove the value field from nodes config — nodes are now created with
zero-initialized values, then randomized at startup and every 1000ms
via UA_Server_addRepeatedCallback. This is intended for testing OPC UA
monitoring and subscriptions.

1 files changed, 25 insertions, 0 deletions

diff --git a/src/server_register.c b/src/server_register.c
index b938ca4..bbd1c31 100644
--- a/src/server_register.c
+++ b/src/server_register.c
@@ -102,6 +102,21 @@ _s_deregister_from_lds (UA_Server *server, const lds_client_params *p,
 }
 
 /* ========================================================================
+ * Node-Update Callback
+ * ======================================================================== */
+
+/**
+ * Repeated callback that randomizes all configured variable node values.
+ * Registered via UA_Server_addRepeatedCallback with a nodes_config pointer.
+ */
+static void
+_s_update_nodes_cb (UA_Server *server, void *data)
+{
+  nodes_config *nc = (nodes_config *)data;
+  nodes_config_randomize (server, nc);
+}
+
+/* ========================================================================
  * Main
  * ======================================================================== */
 
@@ -110,6 +125,7 @@ main (int argc, char **argv)
 {
   signal (SIGINT, _s_stop_handler);
   signal (SIGTERM, _s_stop_handler);
+  srand ((unsigned)time (NULL));
 
   if (argc < 4 || argc > 6)
     {
@@ -241,6 +257,15 @@ main (int argc, char **argv)
      can periodically re-register with the LDS between iterations. */
   UA_Server_run_startup (server);
 
+  /* Assign initial random values and schedule periodic updates. */
+  UA_UInt64 update_cb_id = 0;
+  if (nodes_cfg.count > 0)
+    {
+      nodes_config_randomize (server, &nodes_cfg);
+      UA_Server_addRepeatedCallback (server, _s_update_nodes_cb, &nodes_cfg,
+                                     1000, &update_cb_id);
+    }
+
   retval = _s_register_with_lds (server, &lds_params, discovery_endpoint);
   if (retval != UA_STATUSCODE_GOOD)
     UA_LOG_WARNING (UA_Log_Stdout, UA_LOGCATEGORY_SERVER,