Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2024 Google LLC */
3
4#include "vmlinux.h"
5
6#include <string.h>
7#include <bpf/bpf_helpers.h>
8#include <bpf/bpf_endian.h>
9#include <bpf/bpf_core_read.h>
10#include "bpf_kfuncs.h"
11
12#define REWRITE_ADDRESS_IP4 0xc0a801fe // 192.168.1.254
13#define REWRITE_ADDRESS_PORT4 4040
14
15SEC("cgroup/getpeername4")
16int getpeername_v4_prog(struct bpf_sock_addr *ctx)
17{
18 ctx->user_ip4 = bpf_htonl(REWRITE_ADDRESS_IP4);
19 ctx->user_port = bpf_htons(REWRITE_ADDRESS_PORT4);
20
21 return 1;
22}
23
24char _license[] SEC("license") = "GPL";