iptun_delete
return (iptun_delete(*(datalink_id_t *)karg, cred));
(void) iptun_delete(linkid, iptun->iptun_connp->conn_cred);
extern int iptun_delete(datalink_id_t, cred_t *);
if ((err = iptun_delete(linkid, zone_kcred())) == 0)