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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 #include <network_helpers.h>
   4
   5 #include "test_tcpbpf.h"
   6 #include "test_tcpbpf_kern.skel.h"
   7
   8 #define LO_ADDR6 "::1"
   9 #define CG_NAME "/tcpbpf-user-test"
  10
  11 static void verify_result(struct tcpbpf_globals *result)
  12 {
  13         __u32 expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
  14                                  (1 << BPF_SOCK_OPS_RWND_INIT) |
  15                                  (1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
  16                                  (1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
  17                                  (1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
  18                                  (1 << BPF_SOCK_OPS_NEEDS_ECN) |
  19                                  (1 << BPF_SOCK_OPS_STATE_CB) |
  20                                  (1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
  21
  22         /* check global map */
  23         ASSERT_EQ(expected_events, result->event_map, "event_map");
  24
  25         ASSERT_EQ(result->bytes_received, 501, "bytes_received");
  26         ASSERT_EQ(result->bytes_acked, 1002, "bytes_acked");
  27         ASSERT_EQ(result->data_segs_in, 1, "data_segs_in");
  28         ASSERT_EQ(result->data_segs_out, 1, "data_segs_out");
  29         ASSERT_EQ(result->bad_cb_test_rv, 0x80, "bad_cb_test_rv");
  30         ASSERT_EQ(result->good_cb_test_rv, 0, "good_cb_test_rv");
  31         ASSERT_EQ(result->num_listen, 1, "num_listen");
  32
  33         /* 3 comes from one listening socket + both ends of the connection */
  34         ASSERT_EQ(result->num_close_events, 3, "num_close_events");
  35
  36         /* check setsockopt for SAVE_SYN */
  37         ASSERT_EQ(result->tcp_save_syn, 0, "tcp_save_syn");
  38
  39         /* check getsockopt for SAVED_SYN */
  40         ASSERT_EQ(result->tcp_saved_syn, 1, "tcp_saved_syn");
  41
  42         /* check getsockopt for window_clamp */
  43         ASSERT_EQ(result->window_clamp_client, 9216, "window_clamp_client");
  44         ASSERT_EQ(result->window_clamp_server, 9216, "window_clamp_server");
  45 }
  46
  47 static void run_test(struct tcpbpf_globals *result)
  48 {
  49         int listen_fd = -1, cli_fd = -1, accept_fd = -1;
  50         char buf[1000];
  51         int err = -1;
  52         int i, rv;
  53
  54         listen_fd = start_server(AF_INET6, SOCK_STREAM, LO_ADDR6, 0, 0);
  55         if (!ASSERT_NEQ(listen_fd, -1, "start_server"))
  56                 goto done;
  57
  58         cli_fd = connect_to_fd(listen_fd, 0);
  59         if (!ASSERT_NEQ(cli_fd, -1, "connect_to_fd(listen_fd)"))
  60                 goto done;
  61
  62         accept_fd = accept(listen_fd, NULL, NULL);
  63         if (!ASSERT_NEQ(accept_fd, -1, "accept(listen_fd)"))
  64                 goto done;
  65
  66         /* Send 1000B of '+'s from cli_fd -> accept_fd */
  67         for (i = 0; i < 1000; i++)
  68                 buf[i] = '+';
  69
  70         rv = send(cli_fd, buf, 1000, 0);
  71         if (!ASSERT_EQ(rv, 1000, "send(cli_fd)"))
  72                 goto done;
  73
  74         rv = recv(accept_fd, buf, 1000, 0);
  75         if (!ASSERT_EQ(rv, 1000, "recv(accept_fd)"))
  76                 goto done;
  77
  78         /* Send 500B of '.'s from accept_fd ->cli_fd */
  79         for (i = 0; i < 500; i++)
  80                 buf[i] = '.';
  81
  82         rv = send(accept_fd, buf, 500, 0);
  83         if (!ASSERT_EQ(rv, 500, "send(accept_fd)"))
  84                 goto done;
  85
  86         rv = recv(cli_fd, buf, 500, 0);
  87         if (!ASSERT_EQ(rv, 500, "recv(cli_fd)"))
  88                 goto done;
  89
  90         /*
  91          * shutdown accept first to guarantee correct ordering for
  92          * bytes_received and bytes_acked when we go to verify the results.
  93          */
  94         shutdown(accept_fd, SHUT_WR);
  95         err = recv(cli_fd, buf, 1, 0);
  96         if (!ASSERT_OK(err, "recv(cli_fd) for fin"))
  97                 goto done;
  98
  99         shutdown(cli_fd, SHUT_WR);
 100         err = recv(accept_fd, buf, 1, 0);
 101         ASSERT_OK(err, "recv(accept_fd) for fin");
 102 done:
 103         if (accept_fd != -1)
 104                 close(accept_fd);
 105         if (cli_fd != -1)
 106                 close(cli_fd);
 107         if (listen_fd != -1)
 108                 close(listen_fd);
 109
 110         if (!err)
 111                 verify_result(result);
 112 }
 113
 114 void test_tcpbpf_user(void)
 115 {
 116         struct test_tcpbpf_kern *skel;
 117         int cg_fd = -1;
 118
 119         skel = test_tcpbpf_kern__open_and_load();
 120         if (!ASSERT_OK_PTR(skel, "open and load skel"))
 121                 return;
 122
 123         cg_fd = test__join_cgroup(CG_NAME);
 124         if (!ASSERT_GE(cg_fd, 0, "test__join_cgroup(" CG_NAME ")"))
 125                 goto err;
 126
 127         skel->links.bpf_testcb = bpf_program__attach_cgroup(skel->progs.bpf_testcb, cg_fd);
 128         if (!ASSERT_OK_PTR(skel->links.bpf_testcb, "attach_cgroup(bpf_testcb)"))
 129                 goto err;
 130
 131         run_test(&skel->bss->global);
 132
 133 err:
 134         if (cg_fd != -1)
 135                 close(cg_fd);
 136         test_tcpbpf_kern__destroy(skel);
 137 }