32 lines · c
1// SPDX-License-Identifier: GPL-2.02/* 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 0xfaceb00c13#define REWRITE_ADDRESS_IP6_1 0x1234567814#define REWRITE_ADDRESS_IP6_2 0x0000000015#define REWRITE_ADDRESS_IP6_3 0x0000abcd16 17#define REWRITE_ADDRESS_PORT6 606018 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