1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2020 Cloudflare
3 #include "vmlinux.h"
4 #include <bpf/bpf_helpers.h>
5
6 struct {
7 __uint(type, BPF_MAP_TYPE_SOCKMAP);
8 __uint(max_entries, 1);
9 __type(key, __u32);
10 __type(value, __u64);
11 } map SEC(".maps");
12
13 SEC("sockops")
14 int bpf_sockmap(struct bpf_sock_ops *skops)
15 {
16 __u32 key = 0;
17
18 if (skops->sk)
19 bpf_map_update_elem(&map, &key, skops->sk, 0);
20 return 0;
21 }
22
23 char _license[] SEC("license") = "GPL";
24
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.