TCP_DPORT_OFF      48 samples/bpf/tcbpf1_kern.c 	__u16 old_port = htons(load_half(skb, TCP_DPORT_OFF));
TCP_DPORT_OFF      51 samples/bpf/tcbpf1_kern.c 	bpf_skb_store_bytes(skb, TCP_DPORT_OFF, &new_port, sizeof(new_port), 0);