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 }
138
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