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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2021 Hengqi Chen */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include "bpf_tracing_net.h"
const volatile pid_t my_pid = 0;
char path[256] = {};
SEC("fentry/unix_listen")
int BPF_PROG(unix_listen, struct socket *sock, int backlog)
{
pid_t pid = bpf_get_current_pid_tgid() >> 32;
struct unix_sock *unix_sk;
int i, len;
if (pid != my_pid)
return 0;
unix_sk = (struct unix_sock *)bpf_skc_to_unix_sock(sock->sk);
if (!unix_sk)
return 0;
if (unix_sk->addr->name->sun_path[0])
return 0;
len = unix_sk->addr->len - sizeof(short);
path[0] = '@';
for (i = 1; i < len; i++) {
if (i >= (int)sizeof(struct sockaddr_un))
break;
path[i] = unix_sk->addr->name->sun_path[i];
}
return 0;
}
char _license[] SEC("license") = "GPL";
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