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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";
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