J1939_CAN_HDR 34 net/can/j1939/main.c #define J1939_CAN_FTR (sizeof(struct can_frame) - J1939_CAN_HDR - \ J1939_CAN_HDR 62 net/can/j1939/main.c skb_pull(skb, J1939_CAN_HDR); J1939_CAN_HDR 325 net/can/j1939/main.c cf = skb_push(skb, J1939_CAN_HDR);