- added error handling code to client_example_log.c

- fixed bug in ClientSVControlBlock

examples/iec61850_client_example_log/client_example_log.c

@@ -72,7 +72,9 @@ int main(int argc, char** argv) {
         LinkedList logs = IedConnection_getLogicalNodeDirectory(con, &error, "simpleIOGenericIO/LLN0", ACSI_CLASS_LOG);
 
         if (error == IED_ERROR_OK) {
-            printf("Found log in LN simpleIOGenericIO/LLN0:\n");
+
+            if (LinkedList_size(logs) > 0) {
+                printf("Found logs in LN simpleIOGenericIO/LLN0:\n");
 
                 LinkedList log = LinkedList_getNext(logs);
 
@@ -83,6 +85,10 @@ int main(int argc, char** argv) {
 
                     log = LinkedList_getNext(log);
                 }
+            }
+            else {
+                printf("No logs found\n");
+            }
 
             LinkedList_destroy(logs);
         }
@@ -90,7 +96,7 @@ int main(int argc, char** argv) {
         /* read log control block (using the generic read function) */
         MmsValue* lcbValue = IedConnection_readObject(con, &error, "simpleIOGenericIO/LLN0.EventLog", IEC61850_FC_LG);
 
-        if (error == IED_ERROR_OK) {
+        if ((error == IED_ERROR_OK) && (MmsValue_getType(lcbValue) != MMS_DATA_ACCESS_ERROR)) {
 
             char printBuf[1024];
 

src/iec61850/client/client_sv_control.c

@@ -45,17 +45,17 @@ ClientSVControlBlock_create(IedConnection connection, const char* reference)
     IedClientError error;
     MmsValue* value = IedConnection_readObject(connection, &error, reference, IEC61850_FC_MS);
 
-    if (value != NULL) {
+    if ((error == IED_ERROR_OK) && (MmsValue_getType(value) != MMS_DATA_ACCESS_ERROR)) {
         isMulticast = true;
         MmsValue_delete(value);
     }
     else {
         value = IedConnection_readObject(connection, &error, reference, IEC61850_FC_US);
 
-        if (value == NULL)
+        if ((error == IED_ERROR_OK) && (MmsValue_getType(value) != MMS_DATA_ACCESS_ERROR))
-            return NULL;
-
             MmsValue_delete(value);
+        else
+            return NULL;
     }
 
     ClientSVControlBlock self = (ClientSVControlBlock) GLOBAL_CALLOC(1, sizeof(struct sClientSVControlBlock));