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