--- /dev/null
+#ifndef __UTILS_H__
+#define __UTILS_H__
+
+#include <string>
+
+#include "stg/OBJECT_IDENTIFIER.h"
+#include "stg/SMUX-PDUs.h"
+#include "stg/GetResponse-PDU.h"
+
+bool String2OI(const std::string & str, OBJECT_IDENTIFIER_t * oi);
+bool SendOpenPDU(int fd);
+bool SendClosePDU(int fd);
+bool SendRReqPDU(int fd);
+SMUX_PDUs_t * RecvSMUXPDUs(int fd);
+bool SendGetResponsePDU(int fd, GetResponse_PDU_t * getResponse);
+bool SendGetResponseErrorPDU(int fd,
+ const PDU_t * getRequest,
+ int errorStatus,
+ int errorIndex);
+
+#endif