fixed sdt issue core gui, fixed sdt message sending for python3

daemon/core/api/tlv/corehandlers.py

@@ -527,6 +527,10 @@ class CoreHandler(socketserver.BaseRequestHandler):
             "%s handling message:\n%s", threading.currentThread().getName(), message
         )
 
+        # provide to sdt, if enabled
+        if self.session and self.session.sdt.is_enabled():
+            self.session.sdt.handle_distributed(message)
+
         if message.message_type not in self.message_handlers:
             logging.error("no handler for message type: %s", message.type_str())
             return

daemon/core/plugins/sdt.py

@@ -242,8 +242,8 @@ class Sdt:
         if self.sock is None:
             return False
         try:
-            logging.info("sdt: %s", cmdstr)
-            self.sock.sendall(f"{cmdstr}\n")
+            cmd = f"{cmdstr}\n".encode()
+            self.sock.sendall(cmd)
             return True
         except IOError:
             logging.exception("SDT connection error")