// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>

#include <bpf/bpf_helpers.h>

struct {
        __uint(type, BPF_MAP_TYPE_PROG_ARRAY);
        __uint(max_entries, 1);
        __uint(key_size, sizeof(__u32));
        __uint(value_size, sizeof(__u32));
} jmp_table SEC(".maps");

int count, which;

SEC("tc")
int classifier_0(struct __sk_buff *skb)
{
        count++;
        if (__builtin_constant_p(which))
                __bpf_unreachable();
        bpf_tail_call(skb, &jmp_table, which);
        return 1;
}

SEC("tc")
int entry(struct __sk_buff *skb)
{
        if (__builtin_constant_p(which))
                __bpf_unreachable();
        bpf_tail_call(skb, &jmp_table, which);
        return 0;
}

char __license[] SEC("license") = "GPL";