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

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <test_progs.h>
   4 #include "netns_cookie_prog.skel.h"
   5 #include "network_helpers.h"
   6
   7 #ifndef SO_NETNS_COOKIE
   8 #define SO_NETNS_COOKIE 71
   9 #endif
  10
  11 static int duration;
  12
  13 void test_netns_cookie(void)
  14 {
  15         int server_fd = -1, client_fd = -1, cgroup_fd = -1;
  16         int err, val, ret, map, verdict;
  17         struct netns_cookie_prog *skel;
  18         uint64_t cookie_expected_value;
  19         socklen_t vallen = sizeof(cookie_expected_value);
  20         static const char send_msg[] = "message";
  21
  22         skel = netns_cookie_prog__open_and_load();
  23         if (!ASSERT_OK_PTR(skel, "skel_open"))
  24                 return;
  25
  26         cgroup_fd = test__join_cgroup("/netns_cookie");
  27         if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n"))
  28                 goto done;
  29
  30         skel->links.get_netns_cookie_sockops = bpf_program__attach_cgroup(
  31                 skel->progs.get_netns_cookie_sockops, cgroup_fd);
  32         if (!ASSERT_OK_PTR(skel->links.get_netns_cookie_sockops, "prog_attach"))
  33                 goto done;
  34
  35         verdict = bpf_program__fd(skel->progs.get_netns_cookie_sk_msg);
  36         map = bpf_map__fd(skel->maps.sock_map);
  37         err = bpf_prog_attach(verdict, map, BPF_SK_MSG_VERDICT, 0);
  38         if (!ASSERT_OK(err, "prog_attach"))
  39                 goto done;
  40
  41         server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
  42         if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
  43                 goto done;
  44
  45         client_fd = connect_to_fd(server_fd, 0);
  46         if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
  47                 goto done;
  48
  49         ret = send(client_fd, send_msg, sizeof(send_msg), 0);
  50         if (CHECK(ret != sizeof(send_msg), "send(msg)", "ret:%d\n", ret))
  51                 goto done;
  52
  53         err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sockops_netns_cookies),
  54                                   &client_fd, &val);
  55         if (!ASSERT_OK(err, "map_lookup(sockops_netns_cookies)"))
  56                 goto done;
  57
  58         err = getsockopt(client_fd, SOL_SOCKET, SO_NETNS_COOKIE,
  59                          &cookie_expected_value, &vallen);
  60         if (!ASSERT_OK(err, "getsockopt"))
  61                 goto done;
  62
  63         ASSERT_EQ(val, cookie_expected_value, "cookie_value");
  64
  65         err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sk_msg_netns_cookies),
  66                                   &client_fd, &val);
  67         if (!ASSERT_OK(err, "map_lookup(sk_msg_netns_cookies)"))
  68                 goto done;
  69
  70         ASSERT_EQ(val, cookie_expected_value, "cookie_value");
  71
  72 done:
  73         if (server_fd != -1)
  74                 close(server_fd);
  75         if (client_fd != -1)
  76                 close(client_fd);
  77         if (cgroup_fd != -1)
  78                 close(cgroup_fd);
  79         netns_cookie_prog__destroy(skel);
  80 }