| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (c) 2024 Google LLC */ |
| |
| #include "vmlinux.h" |
| |
| #include <string.h> |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_endian.h> |
| #include <bpf/bpf_core_read.h> |
| #include "bpf_kfuncs.h" |
| |
| #define REWRITE_ADDRESS_IP4 0xc0a801fe // 192.168.1.254 |
| #define REWRITE_ADDRESS_PORT4 4040 |
| |
| SEC("cgroup/getsockname4") |
| int getsockname_v4_prog(struct bpf_sock_addr *ctx) |
| { |
| ctx->user_ip4 = bpf_htonl(REWRITE_ADDRESS_IP4); |
| ctx->user_port = bpf_htons(REWRITE_ADDRESS_PORT4); |
| |
| return 1; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
