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| // SPDX-License-Identifier: GPL-2.0
| // Copyright (c) 2020 Cloudflare
| #include "vmlinux.h"
| #include <bpf/bpf_helpers.h>
|
| struct {
| __uint(type, BPF_MAP_TYPE_SOCKMAP);
| __uint(max_entries, 1);
| __type(key, __u32);
| __type(value, __u64);
| } src SEC(".maps");
|
| struct {
| __uint(type, BPF_MAP_TYPE_SOCKMAP);
| __uint(max_entries, 1);
| __type(key, __u32);
| __type(value, __u64);
| } dst_sock_map SEC(".maps");
|
| struct {
| __uint(type, BPF_MAP_TYPE_SOCKHASH);
| __uint(max_entries, 1);
| __type(key, __u32);
| __type(value, __u64);
| } dst_sock_hash SEC(".maps");
|
| SEC("classifier/copy_sock_map")
| int copy_sock_map(void *ctx)
| {
| struct bpf_sock *sk;
| bool failed = false;
| __u32 key = 0;
|
| sk = bpf_map_lookup_elem(&src, &key);
| if (!sk)
| return SK_DROP;
|
| if (bpf_map_update_elem(&dst_sock_map, &key, sk, 0))
| failed = true;
|
| if (bpf_map_update_elem(&dst_sock_hash, &key, sk, 0))
| failed = true;
|
| bpf_sk_release(sk);
| return failed ? SK_DROP : SK_PASS;
| }
|
| char _license[] SEC("license") = "GPL";
|
|
