inet6_csk_route_req
struct dst_entry *inet6_csk_route_req(const struct sock *sk,
dst = inet6_csk_route_req(sk, dst, &fl6, req, IPPROTO_TCP);
if (!dst && (dst = inet6_csk_route_req(sk, NULL, fl6, req,
return inet6_csk_route_req(sk, NULL, &fl->u.ip6, req, IPPROTO_TCP);