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/bpf_helpers.h> |
6 | #include "bpf_legacy.h" |
7 | |
8 | struct { |
9 | __uint(type, BPF_MAP_TYPE_ARRAY); |
10 | __type(key, u32); |
11 | __type(value, long); |
12 | __uint(max_entries, 256); |
13 | } my_map SEC(".maps" ); |
14 | |
15 | SEC("socket1" ) |
16 | int bpf_prog1(struct __sk_buff *skb) |
17 | { |
18 | int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)); |
19 | long *value; |
20 | |
21 | if (skb->pkt_type != PACKET_OUTGOING) |
22 | return 0; |
23 | |
24 | value = bpf_map_lookup_elem(&my_map, &index); |
25 | if (value) |
26 | __sync_fetch_and_add(value, skb->len); |
27 | |
28 | return 0; |
29 | } |
30 | char _license[] SEC("license" ) = "GPL" ; |
31 | |