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 #define loopback 1
  12
  13 static int duration;
  14
  15 void test_netns_cookie(void)
  16 {
  17         LIBBPF_OPTS(bpf_prog_attach_opts, opta);
  18         LIBBPF_OPTS(bpf_prog_detach_opts, optd);
  19         int server_fd = -1, client_fd = -1, cgroup_fd = -1;
  20         int err, val, ret, map, verdict, tc_fd;
  21         struct netns_cookie_prog *skel;
  22         uint64_t cookie_expected_value;
  23         socklen_t vallen = sizeof(cookie_expected_value);
  24         static const char send_msg[] = "message";
  25
  26         skel = netns_cookie_prog__open_and_load();
  27         if (!ASSERT_OK_PTR(skel, "skel_open"))
  28                 return;
  29
  30         cgroup_fd = test__join_cgroup("/netns_cookie");
  31         if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n"))
  32                 goto done;
  33
  34         skel->links.get_netns_cookie_sockops = bpf_program__attach_cgroup(
  35                 skel->progs.get_netns_cookie_sockops, cgroup_fd);
  36         if (!ASSERT_OK_PTR(skel->links.get_netns_cookie_sockops, "prog_attach"))
  37                 goto done;
  38
  39         verdict = bpf_program__fd(skel->progs.get_netns_cookie_sk_msg);
  40         map = bpf_map__fd(skel->maps.sock_map);
  41         err = bpf_prog_attach(verdict, map, BPF_SK_MSG_VERDICT, 0);
  42         if (!ASSERT_OK(err, "prog_attach"))
  43                 goto done;
  44
  45         tc_fd = bpf_program__fd(skel->progs.get_netns_cookie_tcx);
  46         err = bpf_prog_attach_opts(tc_fd, loopback, BPF_TCX_INGRESS, &opta);
  47         if (!ASSERT_OK(err, "prog_attach"))
  48                 goto done;
  49
  50         server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
  51         if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
  52                 goto cleanup_tc;
  53
  54         client_fd = connect_to_fd(server_fd, 0);
  55         if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
  56                 goto cleanup_tc;
  57
  58         ret = send(client_fd, send_msg, sizeof(send_msg), 0);
  59         if (CHECK(ret != sizeof(send_msg), "send(msg)", "ret:%d\n", ret))
  60                 goto cleanup_tc;
  61
  62         err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sockops_netns_cookies),
  63                                   &client_fd, &val);
  64         if (!ASSERT_OK(err, "map_lookup(sockops_netns_cookies)"))
  65                 goto cleanup_tc;
  66
  67         err = getsockopt(client_fd, SOL_SOCKET, SO_NETNS_COOKIE,
  68                          &cookie_expected_value, &vallen);
  69         if (!ASSERT_OK(err, "getsockopt"))
  70                 goto cleanup_tc;
  71
  72         ASSERT_EQ(val, cookie_expected_value, "cookie_value");
  73
  74         err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sk_msg_netns_cookies),
  75                                   &client_fd, &val);
  76         if (!ASSERT_OK(err, "map_lookup(sk_msg_netns_cookies)"))
  77                 goto cleanup_tc;
  78
  79         ASSERT_EQ(val, cookie_expected_value, "cookie_value");
  80         ASSERT_EQ(skel->bss->tcx_init_netns_cookie, cookie_expected_value, "cookie_value");
  81         ASSERT_EQ(skel->bss->tcx_netns_cookie, cookie_expected_value, "cookie_value");
  82
  83 cleanup_tc:
  84         err = bpf_prog_detach_opts(tc_fd, loopback, BPF_TCX_INGRESS, &optd);
  85         ASSERT_OK(err, "prog_detach");
  86
  87 done:
  88         if (server_fd != -1)
  89                 close(server_fd);
  90         if (client_fd != -1)
  91                 close(client_fd);
  92         if (cgroup_fd != -1)
  93                 close(cgroup_fd);
  94         netns_cookie_prog__destroy(skel);
  95 }