Commit | Line | Data |
---|---|---|
a8085782 AS |
1 | #include <uapi/linux/bpf.h> |
2 | #include <uapi/linux/if_ether.h> | |
3 | #include <uapi/linux/ip.h> | |
4 | #include "bpf_helpers.h" | |
5 | ||
6 | struct bpf_map_def SEC("maps") my_map = { | |
7 | .type = BPF_MAP_TYPE_ARRAY, | |
8 | .key_size = sizeof(u32), | |
9 | .value_size = sizeof(long), | |
10 | .max_entries = 256, | |
11 | }; | |
12 | ||
13 | SEC("socket1") | |
14 | int bpf_prog1(struct sk_buff *skb) | |
15 | { | |
16 | int index = load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)); | |
17 | long *value; | |
18 | ||
19 | value = bpf_map_lookup_elem(&my_map, &index); | |
20 | if (value) | |
21 | __sync_fetch_and_add(value, 1); | |
22 | ||
23 | return 0; | |
24 | } | |
25 | char _license[] SEC("license") = "GPL"; |