Update ied_connection.c

During my test, it was observed that when there are 2 logical nodes with same string repeats, ( such as almGGIO1 and almGGIO10) in those cases, these 2 below functions add the DOs from almGGIO1 to almGGIO10. and model discovery will show invalid DOs under almGGIO10. My test was done in 1.5 version, I think this change is relevent in current version also.

IedConnection_getLogicalNodeDirectory
IedConnection_getLogicalNodeVariables

src/iec61850/client/ied_connection.c

@@ -2783,7 +2783,7 @@ IedConnection_getLogicalNodeDirectory(IedConnection self, IedClientError* error,
                         goto next_element;
 
                     int lnNameLen = (int)(fcPos - variableName);
-
+                    if (strlen(logicalNodeName) == lnNameLen){
                         if (strncmp(variableName, logicalNodeName, lnNameLen) == 0)
                         {
                             char* fcEndPos = strchr(fcPos + 1, '$');
@@ -2802,6 +2802,7 @@ IedConnection_getLogicalNodeDirectory(IedConnection self, IedClientError* error,
                             }
                         }
                     }
+                }
 
                 next_element:
 
@@ -2929,12 +2930,13 @@ IedConnection_getLogicalNodeVariables(IedConnection self, IedClientError* error,
         if (fcPos)
         {
             int lnNameLen = (int)(fcPos - variableName);
-
+            if (strlen(logicalNodeName) == lnNameLen){
                 if (strncmp(variableName, logicalNodeName, lnNameLen) == 0)
                 {
                     LinkedList_add(lnDirectory, StringUtils_copyString(fcPos + 1));
                 }
             }
+        }
 
         variable = LinkedList_getNext(variable);
     }