From 2b291efe08198038a495bac53d8899466b9d8366 Mon Sep 17 00:00:00 2001
From: Andreas Ebner <andreas.ebner@iosb.fraunhofer.de>
Date: Fri, 21 Jun 2024 09:42:28 +0200
Subject: [PATCH] fix(server) check history backend for event support in
 history-read service

---
 src/server/ua_services_attribute.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/server/ua_services_attribute.c b/src/server/ua_services_attribute.c
index 755305c1e6b..48ef05e0843 100644
--- a/src/server/ua_services_attribute.c
+++ b/src/server/ua_services_attribute.c
@@ -1990,6 +1990,14 @@ Service_HistoryRead(UA_Server *server, UA_Session *session,
         return;
     }
 
+    /* Check if the configured History-Backend supports the requested history type */
+    if(!readHistory){
+        UA_LOG_INFO_SESSION(server->config.logging, session,
+                            "The configured HistoryBackend does not support the selected history-type.");
+        response->responseHeader.serviceResult = UA_STATUSCODE_BADNOTSUPPORTED;
+        return;
+    }
+
     /* Something to do? */
     if(request->nodesToReadSize == 0) {
         response->responseHeader.serviceResult = UA_STATUSCODE_BADNOTHINGTODO;