extern int inet_shutdown(struct socket *sock, int how);
extern unsigned int inet_poll(struct file * file, struct socket *sock, struct poll_table_struct *wait);
extern int inet_setsockopt(struct socket *sock, int level,
extern int inet_shutdown(struct socket *sock, int how);
extern unsigned int inet_poll(struct file * file, struct socket *sock, struct poll_table_struct *wait);
extern int inet_setsockopt(struct socket *sock, int level,