diff --git a/src/RS232.h b/src/RS232.h
--- a/src/RS232.h
+++ b/src/RS232.h
@@ -10,6 +10,18 @@ typedef int  rs232speed_t;
 typedef enum {rs232OneStop,rs232One5Stop,rs232TwoStop}rs232stop;
 typedef enum {rs232parityNo,rs232parityOdd,rs232parityEven}rs232parity;
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+typedef struct rs232portslist_t
+{
+	char* name;
+	struct rs232portslist_t* next;
+}rs232portslist_t;
+#ifdef __cplusplus
+}
+#endif
+
 
 #ifdef __cplusplus
     #define rs232extern extern "C"
@@ -17,6 +29,8 @@ typedef enum {rs232parityNo,rs232parityO
     #define rs232extern extern
 #endif
 rs232extern rs232port_t rs232open(char* psPortName);
+rs232extern rs232portslist_t* rs232getportlist();
+rs232extern void rs232deleteportlist(rs232portslist_t* list);
 rs232extern int rs232close(rs232port_t fd);
 rs232extern int rs232setup(rs232port_t fd, int ChSize, int BaudeRate, rs232parity Parity, rs232stop NbStop);
 rs232extern int rs232write(rs232port_t fd,char *psWrite, int WriteBufferSize);
diff --git a/src/RS232_unix.c b/src/RS232_unix.c
--- a/src/RS232_unix.c
+++ b/src/RS232_unix.c
@@ -3,6 +3,7 @@
 #include <fcntl.h>
 #include <string.h>
 #include <errno.h>
+#include <malloc.h>
 #include "rs232config.h"
 #ifdef HAVE_TERMIOS_H
        #include <termios.h>
@@ -42,6 +43,16 @@ int rs232close(rs232port_t fd)
 	}
 }
 
+rs232portslist_t* rs232getportlist()
+{
+	
+
+}
+
+void rs232deleteportlist(rs232portslist_t* list)
+{
+
+}
 
 int rs232setup(rs232port_t fd, int ChSize, int BaudeRate, rs232parity Parity, rs232stop NbStop)
 {
diff --git a/src/RS232_win.c b/src/RS232_win.c
--- a/src/RS232_win.c
+++ b/src/RS232_win.c
@@ -4,6 +4,7 @@
 #include <fcntl.h>
 #include <string.h>
 #include <errno.h>
+#include <malloc.h>
 
 #ifdef HAVE_WINDOWS_H
        #include <windows.h>
@@ -123,6 +124,17 @@ int rs232close(rs232port_t fd)
 	}
 }
 
+rs232portslist_t* rs232getportlist()
+{
+	
+}
+
+void rs232deleteportlist(rs232portslist_t* list)
+{
+
+}
+
+
 int rs232setup(rs232port_t fd, int ChSize, int BaudeRate, rs232parity Parity, rs232stop NbStop)
 {
 	if (fd == (rs232port_t)INVALID_HANDLE_VALUE)