1 #include <linux/bpf.h> 2 #include <bpf/bpf_helpers.h> 3 #include <bpf/bpf_endian.h> 4 5 SEC("sk_skb1") 6 int bpf_prog1(struct __sk_buff *skb) 7 { 8 return skb->len; 9 } 10 11 char _license[] SEC("license") = "GPL"; 12