- added null pointer protection to some constructors/destructors

src/goose/goose_publisher.c

@@ -1,7 +1,7 @@
 /*
  *  goose_publisher.c
  *
- *  Copyright 2013-2018 Michael Zillgith
+ *  Copyright 2013-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -91,6 +91,7 @@ GoosePublisher_create(CommParameters* parameters, const char* interfaceID)
 void
 GoosePublisher_destroy(GoosePublisher self)
 {
+    if (self) {
         if (self->ethernetSocket) {
             Ethernet_destroySocket(self->ethernetSocket);
         }
@@ -111,6 +112,7 @@ GoosePublisher_destroy(GoosePublisher self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 GoosePublisher_setGoID(GoosePublisher self, char* goID)

src/goose/goose_receiver.c

@@ -1,7 +1,7 @@
 /*
  *  goose_receiver.c
  *
- *  Copyright 2014-2017 Michael Zillgith
+ *  Copyright 2014-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -1014,6 +1014,7 @@ GooseReceiver_stop(GooseReceiver self)
 void
 GooseReceiver_destroy(GooseReceiver self)
 {
+    if (self) {
 #if (CONFIG_MMS_THREADLESS_STACK == 0)
         if ((self->thread != NULL) && (GooseReceiver_isRunning(self)))
             GooseReceiver_stop(self);
@@ -1028,6 +1029,7 @@ GooseReceiver_destroy(GooseReceiver self)
         GLOBAL_FREEMEM(self->buffer);
         GLOBAL_FREEMEM(self);
     }
+}
 
 /***************************************
  * Functions for non-threaded operation

src/goose/goose_subscriber.c

@@ -1,7 +1,7 @@
 /*
  *  goose_subscriber.c
  *
- *  Copyright 2013, 2014 Michael Zillgith
+ *  Copyright 2013-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -40,6 +40,7 @@ GooseSubscriber_create(char* goCbRef, MmsValue* dataSetValues)
 {
     GooseSubscriber self = (GooseSubscriber) GLOBAL_CALLOC(1, sizeof(struct sGooseSubscriber));
 
+    if (self) {
         strncpy(self->goCBRef, goCbRef, 129);
         self->goCBRef[129] = 0;
 
@@ -58,6 +59,7 @@ GooseSubscriber_create(char* goCbRef, MmsValue* dataSetValues)
         self->isObserver = false;
         self->vlanSet = false;
         self->parseError = GOOSE_PARSE_ERROR_NO_ERROR;
+    }
 
     return self;
 }
@@ -96,6 +98,7 @@ GooseSubscriber_setAppId(GooseSubscriber self, uint16_t appId)
 void
 GooseSubscriber_destroy(GooseSubscriber self)
 {
+    if (self) {
         MmsValue_delete(self->timestamp);
 
         if (self->dataSetValuesSelfAllocated)
@@ -103,6 +106,7 @@ GooseSubscriber_destroy(GooseSubscriber self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 GooseSubscriber_setListener(GooseSubscriber self, GooseListener listener, void* parameter)

src/iec61850/server/impl/client_connection.c

@@ -1,7 +1,7 @@
 /*
  *  client_connection.c
  *
- *  Copyright 2013, 2014, 2015 Michael Zillgith
+ *  Copyright 2013-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -47,12 +47,14 @@ private_ClientConnection_create(void* serverConnectionHandle)
 {
     ClientConnection self = (ClientConnection) GLOBAL_MALLOC(sizeof(struct sClientConnection));
 
+    if (self) {
 #if (CONFIG_MMS_THREADLESS_STACK != 1)
         self->tasksCountMutex = Semaphore_create(1);
 #endif
 
         self->tasksCount = 0;
         self->serverConnectionHandle = serverConnectionHandle;
+    }
 
     return self;
 }
@@ -60,12 +62,14 @@ private_ClientConnection_create(void* serverConnectionHandle)
 void
 private_ClientConnection_destroy(ClientConnection self)
 {
+    if (self) {
 #if (CONFIG_MMS_THREADLESS_STACK != 1)
         Semaphore_destroy(self->tasksCountMutex);
 #endif
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 int
 private_ClientConnection_getTasksCount(ClientConnection self)

src/iec61850/server/impl/ied_server.c

@@ -1,7 +1,7 @@
 /*
  *  ied_server.c
  *
- *  Copyright 2013-2020 Michael Zillgith
+ *  Copyright 2013-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -594,7 +594,7 @@ IedServer_setRCBEventHandler(IedServer self, IedServer_RCBEventHandler handler,
 void
 IedServer_destroy(IedServer self)
 {
-
+    if (self) {
     /* Stop server if running */
         if (self->running) {
 #if (CONFIG_MMS_THREADLESS_STACK == 1)
@@ -640,6 +640,7 @@ IedServer_destroy(IedServer self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 IedServer_setAuthenticator(IedServer self, AcseAuthenticator authenticator, void* authenticatorParameter)

src/iec61850/server/impl/ied_server_config.c

@@ -1,7 +1,7 @@
 /*
  *  ied_server_config.c
  *
- *  Copyright 2018-2020 Michael Zillgith
+ *  Copyright 2018-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -65,9 +65,11 @@ IedServerConfig_create()
 void
 IedServerConfig_destroy(IedServerConfig self)
 {
+    if (self) {
         GLOBAL_FREEMEM(self->fileServiceBasepath);
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 IedServerConfig_setEdition(IedServerConfig self, uint8_t edition)

src/iec61850/server/mms_mapping/control.c

@@ -1,7 +1,7 @@
 /*
  *  control.c
  *
- *  Copyright 2013-2021 Michael Zillgith
+ *  Copyright 2013-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -1254,6 +1254,7 @@ ControlObject_handlePendingEvents(ControlObject* self)
 void
 ControlObject_destroy(ControlObject* self)
 {
+    if (self) {
         if (self->mmsValue)
             MmsValue_delete(self->mmsValue);
 
@@ -1285,6 +1286,7 @@ ControlObject_destroy(ControlObject* self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 char*
 ControlObject_getName(ControlObject* self)

src/iec61850/server/mms_mapping/logging.c

@@ -1,7 +1,7 @@
 /*
  *  logging.c
  *
- *  Copyright 2016 Michael Zillgith
+ *  Copyright 2016-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -48,6 +48,7 @@ LogInstance_create(LogicalNode* parentLN, const char* name)
 {
     LogInstance* self = (LogInstance*) GLOBAL_MALLOC(sizeof(LogInstance));
 
+    if (self) {
         self->name = StringUtils_copyString(name);
         self->parentLN = parentLN;
         self->logStorage = NULL;
@@ -57,6 +58,7 @@ LogInstance_create(LogicalNode* parentLN, const char* name)
         self->oldEntryTime = 0;
         self->newEntryId = 0;
         self->newEntryTime = 0;
+    }
 
     return self;
 }
@@ -64,9 +66,11 @@ LogInstance_create(LogicalNode* parentLN, const char* name)
 void
 LogInstance_destroy(LogInstance* self)
 {
+    if (self) {
         GLOBAL_FREEMEM(self->name);
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 LogInstance_logSingleData(LogInstance* self, const char* dataRef, MmsValue* value, uint8_t flag)
@@ -185,6 +189,7 @@ LogControl_create(LogicalNode* parentLN, MmsMapping* mmsMapping)
 {
     LogControl* self = (LogControl*) GLOBAL_MALLOC(sizeof(LogControl));
 
+    if (self) {
         self->enabled = false;
         self->dataSet = NULL;
         self->isDynamicDataSet = false;
@@ -196,6 +201,7 @@ LogControl_create(LogicalNode* parentLN, MmsMapping* mmsMapping)
         self->intgPd = 0;
         self->nextIntegrityScan = 0;
         self->logRef = NULL;
+    }
 
     return self;
 }

src/iec61850/server/mms_mapping/mms_goose.c

@@ -274,6 +274,8 @@ MmsGooseControlBlock_create()
 void
 MmsGooseControlBlock_destroy(MmsGooseControlBlock self)
 {
+    if (self) {
+
 #if (CONFIG_MMS_THREADLESS_STACK != 1)
         Semaphore_destroy(self->publisherMutex);
 #endif
@@ -308,6 +310,7 @@ MmsGooseControlBlock_destroy(MmsGooseControlBlock self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 void
 MmsGooseControlBlock_useGooseVlanTag(MmsGooseControlBlock self, bool useVlanTag)

src/iec61850/server/mms_mapping/mms_sv.c

@@ -1,7 +1,7 @@
 /*
  *  mms_sv.c
  *
- *  Copyright 2015 Michael Zillgith
+ *  Copyright 2015-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -67,10 +67,12 @@ MmsSampledValueControlBlock_create()
 void
 MmsSampledValueControlBlock_destroy(MmsSampledValueControlBlock self)
 {
+    if (self) {
         MmsValue_delete(self->mmsValue);
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 static MmsSampledValueControlBlock
 lookupSVCB(MmsMapping* self, MmsDomain* domain, char* lnName, char* objectName)

src/iec61850/server/mms_mapping/reporting.c

@@ -84,6 +84,7 @@ ReportBuffer_create(int bufferSize)
 static void
 ReportBuffer_destroy(ReportBuffer* self)
 {
+    if (self) {
         GLOBAL_FREEMEM(self->memoryBlock);
 
 #if (CONFIG_MMS_THREADLESS_STACK != 1)
@@ -92,11 +93,14 @@ ReportBuffer_destroy(ReportBuffer* self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 ReportControl*
 ReportControl_create(bool buffered, LogicalNode* parentLN, int reportBufferSize, IedServer iedServer)
 {
     ReportControl* self = (ReportControl*) GLOBAL_MALLOC(sizeof(ReportControl));
+
+    if (self) {
         self->name = NULL;
         self->domain = NULL;
         self->parentLN = parentLN;
@@ -141,6 +145,7 @@ ReportControl_create(bool buffered, LogicalNode* parentLN, int reportBufferSize,
         self->server = iedServer;
 
         self->reportBuffer = ReportBuffer_create(reportBufferSize);
+    }
 
     return self;
 }
@@ -206,6 +211,7 @@ deleteDataSetValuesShadowBuffer(ReportControl* self)
 void
 ReportControl_destroy(ReportControl* self)
 {
+    if (self) {
         if (self->rcbValues != NULL )
             MmsValue_delete(self->rcbValues);
 
@@ -245,6 +251,7 @@ ReportControl_destroy(ReportControl* self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 MmsValue*
 ReportControl_getRCBValue(ReportControl* rc, char* elementName)

src/iec61850/server/model/dynamic_model.c

@@ -1,7 +1,7 @@
 /*
  *  dynamic_model.c
  *
- *  Copyright 2014-2016 Michael Zillgith
+ *  Copyright 2014-2022 Michael Zillgith
  *
  *  This file is part of libIEC61850.
  *
@@ -761,6 +761,9 @@ DataSetEntry_create(DataSet* dataSet, const char* variable, int index, const cha
 static void
 ModelNode_destroy(ModelNode* modelNode)
 {
+    if (modelNode) {
+
+        if (modelNode->name)
             GLOBAL_FREEMEM(modelNode->name);
 
         ModelNode* currentChild = modelNode->firstChild;
@@ -784,10 +787,12 @@ ModelNode_destroy(ModelNode* modelNode)
 
         GLOBAL_FREEMEM(modelNode);
     }
+}
 
 void
 IedModel_destroy(IedModel* model)
 {
+    if (model) {
         /* delete all model nodes and dynamically created strings */
 
         /* delete all logical devices */
@@ -951,4 +956,5 @@ IedModel_destroy(IedModel* model)
 
         GLOBAL_FREEMEM(model);
     }
+}
 

src/sampled_values/sv_publisher.c

@@ -483,6 +483,7 @@ SVPublisher_publish(SVPublisher self)
 void
 SVPublisher_destroy(SVPublisher self)
 {
+    if (self) {
         if (self->ethernetSocket)
             Ethernet_destroySocket(self->ethernetSocket);
 
@@ -501,6 +502,7 @@ SVPublisher_destroy(SVPublisher self)
 
         GLOBAL_FREEMEM(self);
     }
+}
 
 
 void