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