l4_protocol
u8 l4_protocol = 0;
l4_protocol = ip_hdr(skb)->protocol;
l4_protocol = ipv6_hdr(skb)->nexthdr;
if (l4_protocol == IPPROTO_TCP)
__u8 l4_protocol;
fl4.flowi4_proto = params->l4_protocol;
fl6.flowi6_proto = params->l4_protocol;
.l4proto = fib_tuple->l4_protocol,
fib_params.l4_protocol = iph->protocol;
fib_params.l4_protocol = ip6h->nexthdr;
__u8 l4_protocol;
params->l4_protocol = IPPROTO_TCP;
fib_params->l4_protocol = ip4h->protocol;
fib_params->l4_protocol = ip6h->nexthdr;
tuple.l4_protocol = iph->protocol;
tuple.l4_protocol = ip6h->nexthdr;