tpacket_req_u
static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
union tpacket_req_u req_u;
union tpacket_req_u req_u;
static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
union tpacket_req_u *req_u)
union tpacket_req_u *req_u)