tools/testing/selftests/bpf/prog_tests/socket_cookie.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2020 Google LLC.
   3 // Copyright (c) 2018 Facebook
   4
   5 #include <test_progs.h>
   6 #include "socket_cookie_prog.skel.h"
   7 #include "network_helpers.h"
   8
   9 static int duration;
  10
  11 struct socket_cookie {
  12         __u64 cookie_key;
  13         __u32 cookie_value;
  14 };
  15
  16 void test_socket_cookie(void)
  17 {
  18         int server_fd = 0, client_fd = 0, cgroup_fd = 0, err = 0;
  19         socklen_t addr_len = sizeof(struct sockaddr_in6);
  20         struct socket_cookie_prog *skel;
  21         __u32 cookie_expected_value;
  22         struct sockaddr_in6 addr;
  23         struct socket_cookie val;
  24
  25         skel = socket_cookie_prog__open_and_load();
  26         if (!ASSERT_OK_PTR(skel, "skel_open"))
  27                 return;
  28
  29         cgroup_fd = test__join_cgroup("/socket_cookie");
  30         if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n"))
  31                 goto out;
  32
  33         skel->links.set_cookie = bpf_program__attach_cgroup(
  34                 skel->progs.set_cookie, cgroup_fd);
  35         if (!ASSERT_OK_PTR(skel->links.set_cookie, "prog_attach"))
  36                 goto close_cgroup_fd;
  37
  38         skel->links.update_cookie_sockops = bpf_program__attach_cgroup(
  39                 skel->progs.update_cookie_sockops, cgroup_fd);
  40         if (!ASSERT_OK_PTR(skel->links.update_cookie_sockops, "prog_attach"))
  41                 goto close_cgroup_fd;
  42
  43         skel->links.update_cookie_tracing = bpf_program__attach(
  44                 skel->progs.update_cookie_tracing);
  45         if (!ASSERT_OK_PTR(skel->links.update_cookie_tracing, "prog_attach"))
  46                 goto close_cgroup_fd;
  47
  48         server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
  49         if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
  50                 goto close_cgroup_fd;
  51
  52         client_fd = connect_to_fd(server_fd, 0);
  53         if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
  54                 goto close_server_fd;
  55
  56         err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.socket_cookies),
  57                                   &client_fd, &val);
  58         if (!ASSERT_OK(err, "map_lookup(socket_cookies)"))
  59                 goto close_client_fd;
  60
  61         err = getsockname(client_fd, (struct sockaddr *)&addr, &addr_len);
  62         if (!ASSERT_OK(err, "getsockname"))
  63                 goto close_client_fd;
  64
  65         cookie_expected_value = (ntohs(addr.sin6_port) << 8) | 0xFF;
  66         ASSERT_EQ(val.cookie_value, cookie_expected_value, "cookie_value");
  67
  68 close_client_fd:
  69         close(client_fd);
  70 close_server_fd:
  71         close(server_fd);
  72 close_cgroup_fd:
  73         close(cgroup_fd);
  74 out:
  75         socket_cookie_prog__destroy(skel);
  76 }