struct vii { /* v2lni leader */ u_char v_dst; /* destination address */ u_char v_src; /* source address */ u_char v_ver; /* version */ u_char v_pr; /* protocol */ u_short v_len; /* length (internal only) */ }; #define VIIMTU 2046 #define VIIVERSION 2 #define VIIPROTO 1 /* ifcb device specific flags */ #define VIIRETRY 7 /* # of timeout retries */