1 #include <uapi/linux/bpf.h>
2 #include <uapi/linux/if_ether.h>
3 #include <uapi/linux/if_packet.h>
4 #include <uapi/linux/ip.h>
5 #include "bpf_helpers.h"
8 __uint(type, BPF_MAP_TYPE_ARRAY);
11 __uint(max_entries, 256);
12 } my_map SEC(".maps");
15 int bpf_prog1(struct __sk_buff *skb)
17 int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol));
20 if (skb->pkt_type != PACKET_OUTGOING)
23 value = bpf_map_lookup_elem(&my_map, &index);
25 __sync_fetch_and_add(value, skb->len);
29 char _license[] SEC("license") = "GPL";