- fixed memory leak in reuse of client connection (related to socket extension buffer)

src/mms/iso_client/iso_client_connection.c

@@ -193,15 +193,23 @@ IsoClientConnection_create(IsoConnectionParameters parameters, IsoIndicationCall
 static bool
 sendConnectionRequestMessage(IsoClientConnection self)
 {
+    int socketExtensionBufferSize = CONFIG_MMS_MAXIMUM_PDU_SIZE + 1000;
+    uint8_t* socketExtensionBuffer = NULL;
+
     if (self->cotpConnection) {
         /* Destroy existing handle set when connection is reused */
         if (self->cotpConnection->handleSet)
             Handleset_destroy(self->cotpConnection->handleSet);
         self->cotpConnection->handleSet = NULL;
+
+        socketExtensionBuffer = self->cotpConnection->socketExtensionBuffer;
     }
 
-    int socketExtensionBufferSize = CONFIG_MMS_MAXIMUM_PDU_SIZE + 1000;
-    uint8_t* socketExtensionBuffer = (uint8_t*)GLOBAL_MALLOC(socketExtensionBufferSize);
+    if (socketExtensionBuffer == NULL) {
+        socketExtensionBuffer = (uint8_t*)GLOBAL_MALLOC(socketExtensionBufferSize);
+    }
+
+    if (socketExtensionBuffer) {
 
         /* COTP (ISO transport) handshake */
         CotpConnection_init(self->cotpConnection, self->socket, self->receiveBuffer, self->cotpReadBuffer, self->cotpWriteBuffer,
@@ -236,6 +244,13 @@ sendConnectionRequestMessage(IsoClientConnection self)
         else
             return true;
     }
+    else {
+        if (DEBUG_ISO_CLIENT)
+            printf("ISO_CLIENT: Failed to allocate socket extension buffer\n");
+
+        return false;
+    }
+}
 
 static void
 sendAcseInitiateRequest(IsoClientConnection self)
@@ -755,7 +770,6 @@ IsoClientConnection_close(IsoClientConnection self)
     }
 }
 
-
 void
 IsoClientConnection_destroy(IsoClientConnection self)
 {