X25_MAX_L2_LEN
size = len + X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
skb_reserve(skb, X25_MAX_L2_LEN + X25_EXT_MIN_LEN);
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
skb_reserve(skb, X25_MAX_L2_LEN);
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN;
skb_reserve(skb, X25_MAX_L2_LEN);
int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
skb_reserve(skb, X25_MAX_L2_LEN);
int len = X25_MAX_L2_LEN + X25_EXT_MIN_LEN;
skb_reserve(skb, X25_MAX_L2_LEN);