-extern int rpl_close(int);
-extern int rpl_socket (int, int, int protocol);
-extern int rpl_connect (int, struct sockaddr *, int);
-extern int rpl_accept (int, struct sockaddr *, int *);
-extern int rpl_bind (int, struct sockaddr *, int);
-extern int rpl_getpeername (int, struct sockaddr *, int *);
-extern int rpl_getsockname (int, struct sockaddr *, int *);
-extern int rpl_getsockopt (int, int, int, void *, int *);
-extern int rpl_listen (int, int);
-extern int rpl_ioctl (int, unsigned long, char *);
-extern int rpl_recv (int, void *, int, int);
-extern int rpl_send (int, const void *, int, int);
-extern int rpl_recvfrom (int, void *, int, int, struct sockaddr *, int *);
-extern int rpl_sendto (int, const void *, int, int, struct sockaddr *, int);
-extern int rpl_setsockopt (int, int, int, const void *, int);