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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Carlos Neira cneirabustos@gmail.com */
#include <linux/bpf.h>
#include <stdint.h>
#include <bpf/bpf_helpers.h>
struct {
__uint(type, BPF_MAP_TYPE_SOCKMAP);
__uint(max_entries, 2);
__type(key, __u32);
__type(value, __u32);
} sock_map SEC(".maps");
__u64 user_pid = 0;
__u64 user_tgid = 0;
__u64 dev = 0;
__u64 ino = 0;
static void get_pid_tgid(void)
{
struct bpf_pidns_info nsdata;
if (bpf_get_ns_current_pid_tgid(dev, ino, &nsdata, sizeof(struct bpf_pidns_info)))
return;
user_pid = nsdata.pid;
user_tgid = nsdata.tgid;
}
SEC("?tracepoint/syscalls/sys_enter_nanosleep")
int tp_handler(const void *ctx)
{
get_pid_tgid();
return 0;
}
SEC("?cgroup/bind4")
int cgroup_bind4(struct bpf_sock_addr *ctx)
{
get_pid_tgid();
return 1;
}
SEC("?sk_msg")
int sk_msg(struct sk_msg_md *msg)
{
get_pid_tgid();
return SK_PASS;
}
char _license[] SEC("license") = "GPL";
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