bpf/prog_tests/socket_cookie.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 // Copyright (c) 2020 Google LLC.
0003 // Copyright (c) 2018 Facebook
0004
0005 #include <test_progs.h>
0006 #include "socket_cookie_prog.skel.h"
0007 #include "network_helpers.h"
0008
0009 static int duration;
0010
0011 struct socket_cookie {
0012     __u64 cookie_key;
0013     __u32 cookie_value;
0014 };
0015
0016 void test_socket_cookie(void)
0017 {
0018     int server_fd = 0, client_fd = 0, cgroup_fd = 0, err = 0;
0019     socklen_t addr_len = sizeof(struct sockaddr_in6);
0020     struct socket_cookie_prog *skel;
0021     __u32 cookie_expected_value;
0022     struct sockaddr_in6 addr;
0023     struct socket_cookie val;
0024
0025     skel = socket_cookie_prog__open_and_load();
0026     if (!ASSERT_OK_PTR(skel, "skel_open"))
0027         return;
0028
0029     cgroup_fd = test__join_cgroup("/socket_cookie");
0030     if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n"))
0031         goto out;
0032
0033     skel->links.set_cookie = bpf_program__attach_cgroup(
0034         skel->progs.set_cookie, cgroup_fd);
0035     if (!ASSERT_OK_PTR(skel->links.set_cookie, "prog_attach"))
0036         goto close_cgroup_fd;
0037
0038     skel->links.update_cookie_sockops = bpf_program__attach_cgroup(
0039         skel->progs.update_cookie_sockops, cgroup_fd);
0040     if (!ASSERT_OK_PTR(skel->links.update_cookie_sockops, "prog_attach"))
0041         goto close_cgroup_fd;
0042
0043     skel->links.update_cookie_tracing = bpf_program__attach(
0044         skel->progs.update_cookie_tracing);
0045     if (!ASSERT_OK_PTR(skel->links.update_cookie_tracing, "prog_attach"))
0046         goto close_cgroup_fd;
0047
0048     server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
0049     if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
0050         goto close_cgroup_fd;
0051
0052     client_fd = connect_to_fd(server_fd, 0);
0053     if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
0054         goto close_server_fd;
0055
0056     err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.socket_cookies),
0057                   &client_fd, &val);
0058     if (!ASSERT_OK(err, "map_lookup(socket_cookies)"))
0059         goto close_client_fd;
0060
0061     err = getsockname(client_fd, (struct sockaddr *)&addr, &addr_len);
0062     if (!ASSERT_OK(err, "getsockname"))
0063         goto close_client_fd;
0064
0065     cookie_expected_value = (ntohs(addr.sin6_port) << 8) | 0xFF;
0066     ASSERT_EQ(val.cookie_value, cookie_expected_value, "cookie_value");
0067
0068 close_client_fd:
0069     close(client_fd);
0070 close_server_fd:
0071     close(server_fd);
0072 close_cgroup_fd:
0073     close(cgroup_fd);
0074 out:
0075     socket_cookie_prog__destroy(skel);
0076 }