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// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook
#include <linux/stddef.h>
#include <linux/bpf.h>
#include <linux/pkt_cls.h>
#include <bpf/bpf_endian.h>
#include <bpf/bpf_helpers.h>
struct {
__uint(type, BPF_MAP_TYPE_SOCKMAP);
__type(key, int);
__type(value, int);
__uint(max_entries, 2);
} sock_map SEC(".maps");
SEC("freplace/cls_redirect")
int freplace_cls_redirect_test(struct __sk_buff *skb)
{
int ret = 0;
const int zero = 0;
struct bpf_sock *sk;
sk = bpf_map_lookup_elem(&sock_map, &zero);
if (!sk)
return TC_ACT_SHOT;
ret = bpf_map_update_elem(&sock_map, &zero, sk, 0);
bpf_sk_release(sk);
return ret == 0 ? TC_ACT_OK : TC_ACT_SHOT;
}
char _license[] SEC("license") = "GPL";
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