ovpn_cb
memset(ovpn_skb_cb(skb), 0, sizeof(struct ovpn_cb));
memset(ovpn_skb_cb(skb), 0, sizeof(struct ovpn_cb));
static inline struct ovpn_cb *ovpn_skb_cb(struct sk_buff *skb)
BUILD_BUG_ON(sizeof(struct ovpn_cb) > sizeof(skb->cb));
return (struct ovpn_cb *)skb->cb;