tools/testing/selftests/bpf/progs/getsockname6_prog.c

   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
  19 SEC("cgroup/getsockname6")
  20 int getsockname_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
  31 char _license[] SEC("license") = "GPL";