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_IP6_0 0xfaceb00c
13#define REWRITE_ADDRESS_IP6_1 0x12345678
14#define REWRITE_ADDRESS_IP6_2 0x00000000
15#define REWRITE_ADDRESS_IP6_3 0x0000abcd
16
17#define REWRITE_ADDRESS_PORT6 6060
18
19SEC("cgroup/getpeername6")
20int getpeername_v6_prog(struct bpf_sock_addr *ctx)
21{
22	ctx->user_ip6[0] = bpf_htonl(REWRITE_ADDRESS_IP6_0);
23	ctx->user_ip6[1] = bpf_htonl(REWRITE_ADDRESS_IP6_1);
24	ctx->user_ip6[2] = bpf_htonl(REWRITE_ADDRESS_IP6_2);
25	ctx->user_ip6[3] = bpf_htonl(REWRITE_ADDRESS_IP6_3);
26	ctx->user_port = bpf_htons(REWRITE_ADDRESS_PORT6);
27
28	return 1;
29}
30
31char _license[] SEC("license") = "GPL";
32