1*bc467e95SJordan Rife // SPDX-License-Identifier: GPL-2.0 2*bc467e95SJordan Rife /* Copyright (c) 2024 Google LLC */ 3*bc467e95SJordan Rife 4*bc467e95SJordan Rife #include "vmlinux.h" 5*bc467e95SJordan Rife 6*bc467e95SJordan Rife #include <string.h> 7*bc467e95SJordan Rife #include <bpf/bpf_helpers.h> 8*bc467e95SJordan Rife #include <bpf/bpf_endian.h> 9*bc467e95SJordan Rife #include <bpf/bpf_core_read.h> 10*bc467e95SJordan Rife #include "bpf_kfuncs.h" 11*bc467e95SJordan Rife 12*bc467e95SJordan Rife #define REWRITE_ADDRESS_IP6_0 0xfaceb00c 13*bc467e95SJordan Rife #define REWRITE_ADDRESS_IP6_1 0x12345678 14*bc467e95SJordan Rife #define REWRITE_ADDRESS_IP6_2 0x00000000 15*bc467e95SJordan Rife #define REWRITE_ADDRESS_IP6_3 0x0000abcd 16*bc467e95SJordan Rife 17*bc467e95SJordan Rife #define REWRITE_ADDRESS_PORT6 6060 18*bc467e95SJordan Rife 19*bc467e95SJordan Rife SEC("cgroup/getpeername6") getpeername_v6_prog(struct bpf_sock_addr * ctx)20*bc467e95SJordan Rifeint getpeername_v6_prog(struct bpf_sock_addr *ctx) 21*bc467e95SJordan Rife { 22*bc467e95SJordan Rife ctx->user_ip6[0] = bpf_htonl(REWRITE_ADDRESS_IP6_0); 23*bc467e95SJordan Rife ctx->user_ip6[1] = bpf_htonl(REWRITE_ADDRESS_IP6_1); 24*bc467e95SJordan Rife ctx->user_ip6[2] = bpf_htonl(REWRITE_ADDRESS_IP6_2); 25*bc467e95SJordan Rife ctx->user_ip6[3] = bpf_htonl(REWRITE_ADDRESS_IP6_3); 26*bc467e95SJordan Rife ctx->user_port = bpf_htons(REWRITE_ADDRESS_PORT6); 27*bc467e95SJordan Rife 28*bc467e95SJordan Rife return 1; 29*bc467e95SJordan Rife } 30*bc467e95SJordan Rife 31*bc467e95SJordan Rife char _license[] SEC("license") = "GPL"; 32