1 // SPDX-License-Identifier: GPL-2.0
2 /* Author: Dmitry Safonov <dima@arista.com> */
3 /* This is over-simplified TCP_REPAIR for TCP_ESTABLISHED sockets
4 * It tests that TCP-AO enabled connection can be restored.
5 * For the proper socket repair see:
6 * https://github.com/checkpoint-restore/criu/blob/criu-dev/soccr/soccr.h
7 */
8 #include <inttypes.h>
9 #include "aolib.h"
10
11 const size_t nr_packets = 20;
12 const size_t msg_len = 100;
13 const size_t quota = nr_packets * msg_len;
14 #define fault(type) (inj == FAULT_ ## type)
15
16 static void try_server_run(const char *tst_name, unsigned int port,
17 fault_t inj, test_cnt cnt_expected)
18 {
19 const char *cnt_name = "TCPAOGood";
20 struct tcp_ao_counters ao1, ao2;
21 uint64_t before_cnt, after_cnt;
22 int sk, lsk;
23 time_t timeout;
24 ssize_t bytes;
25
26 if (fault(TIMEOUT))
27 cnt_name = "TCPAOBad";
28 lsk = test_listen_socket(this_ip_addr, port, 1);
29
30 if (test_add_key(lsk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1, 100, 100))
31 test_error("setsockopt(TCP_AO_ADD_KEY)");
32 synchronize_threads(); /* 1: MKT added => connect() */
33
34 if (test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0))
35 test_error("test_wait_fd()");
36
37 sk = accept(lsk, NULL, NULL);
38 if (sk < 0)
39 test_error("accept()");
40
41 synchronize_threads(); /* 2: accepted => send data */
42 close(lsk);
43
44 bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
45 if (bytes != quota) {
46 test_fail("%s: server served: %zd", tst_name, bytes);
47 goto out;
48 }
49
50 before_cnt = netstat_get_one(cnt_name, NULL);
51 if (test_get_tcp_ao_counters(sk, &ao1))
52 test_error("test_get_tcp_ao_counters()");
53
54 timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
55 bytes = test_server_run(sk, quota, timeout);
56 if (fault(TIMEOUT)) {
57 if (bytes > 0)
58 test_fail("%s: server served: %zd", tst_name, bytes);
59 else
60 test_ok("%s: server couldn't serve", tst_name);
61 } else {
62 if (bytes != quota)
63 test_fail("%s: server served: %zd", tst_name, bytes);
64 else
65 test_ok("%s: server alive", tst_name);
66 }
67 if (test_get_tcp_ao_counters(sk, &ao2))
68 test_error("test_get_tcp_ao_counters()");
69 after_cnt = netstat_get_one(cnt_name, NULL);
70
71 test_tcp_ao_counters_cmp(tst_name, &ao1, &ao2, cnt_expected);
72
73 if (after_cnt <= before_cnt) {
74 test_fail("%s: %s counter did not increase: %zu <= %zu",
75 tst_name, cnt_name, after_cnt, before_cnt);
76 } else {
77 test_ok("%s: counter %s increased %zu => %zu",
78 tst_name, cnt_name, before_cnt, after_cnt);
79 }
80
81 /*
82 * Before close() as that will send FIN and move the peer in TCP_CLOSE
83 * and that will prevent reading AO counters from the peer's socket.
84 */
85 synchronize_threads(); /* 3: verified => closed */
86 out:
87 close(sk);
88 }
89
90 static void *server_fn(void *arg)
91 {
92 unsigned int port = test_server_port;
93
94 try_server_run("TCP-AO migrate to another socket", port++,
95 0, TEST_CNT_GOOD);
96 try_server_run("TCP-AO with wrong send ISN", port++,
97 FAULT_TIMEOUT, TEST_CNT_BAD);
98 try_server_run("TCP-AO with wrong receive ISN", port++,
99 FAULT_TIMEOUT, TEST_CNT_BAD);
100 try_server_run("TCP-AO with wrong send SEQ ext number", port++,
101 FAULT_TIMEOUT, TEST_CNT_BAD);
102 try_server_run("TCP-AO with wrong receive SEQ ext number", port++,
103 FAULT_TIMEOUT, TEST_CNT_NS_BAD | TEST_CNT_GOOD);
104
105 synchronize_threads(); /* don't race to exit: client exits */
106 return NULL;
107 }
108
109 static void test_get_sk_checkpoint(unsigned int server_port, sockaddr_af *saddr,
110 struct tcp_sock_state *img,
111 struct tcp_ao_repair *ao_img)
112 {
113 int sk;
114
115 sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
116 if (sk < 0)
117 test_error("socket()");
118
119 if (test_add_key(sk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1, 100, 100))
120 test_error("setsockopt(TCP_AO_ADD_KEY)");
121
122 synchronize_threads(); /* 1: MKT added => connect() */
123 if (test_connect_socket(sk, this_ip_dest, server_port) <= 0)
124 test_error("failed to connect()");
125
126 synchronize_threads(); /* 2: accepted => send data */
127 if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC))
128 test_fail("pre-migrate verify failed");
129
130 test_enable_repair(sk);
131 test_sock_checkpoint(sk, img, saddr);
132 test_ao_checkpoint(sk, ao_img);
133 test_kill_sk(sk);
134 }
135
136 static void test_sk_restore(const char *tst_name, unsigned int server_port,
137 sockaddr_af *saddr, struct tcp_sock_state *img,
138 struct tcp_ao_repair *ao_img,
139 fault_t inj, test_cnt cnt_expected)
140 {
141 const char *cnt_name = "TCPAOGood";
142 struct tcp_ao_counters ao1, ao2;
143 uint64_t before_cnt, after_cnt;
144 time_t timeout;
145 int sk;
146
147 if (fault(TIMEOUT))
148 cnt_name = "TCPAOBad";
149
150 before_cnt = netstat_get_one(cnt_name, NULL);
151 sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
152 if (sk < 0)
153 test_error("socket()");
154
155 test_enable_repair(sk);
156 test_sock_restore(sk, img, saddr, this_ip_dest, server_port);
157 if (test_add_repaired_key(sk, DEFAULT_TEST_PASSWORD, 0, this_ip_dest, -1, 100, 100))
158 test_error("setsockopt(TCP_AO_ADD_KEY)");
159 test_ao_restore(sk, ao_img);
160
161 if (test_get_tcp_ao_counters(sk, &ao1))
162 test_error("test_get_tcp_ao_counters()");
163
164 test_disable_repair(sk);
165 test_sock_state_free(img);
166
167 timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
168 if (test_client_verify(sk, msg_len, nr_packets, timeout)) {
169 if (fault(TIMEOUT))
170 test_ok("%s: post-migrate connection is broken", tst_name);
171 else
172 test_fail("%s: post-migrate connection is working", tst_name);
173 } else {
174 if (fault(TIMEOUT))
175 test_fail("%s: post-migrate connection still working", tst_name);
176 else
177 test_ok("%s: post-migrate connection is alive", tst_name);
178 }
179 if (test_get_tcp_ao_counters(sk, &ao2))
180 test_error("test_get_tcp_ao_counters()");
181 after_cnt = netstat_get_one(cnt_name, NULL);
182
183 test_tcp_ao_counters_cmp(tst_name, &ao1, &ao2, cnt_expected);
184
185 if (after_cnt <= before_cnt) {
186 test_fail("%s: %s counter did not increase: %zu <= %zu",
187 tst_name, cnt_name, after_cnt, before_cnt);
188 } else {
189 test_ok("%s: counter %s increased %zu => %zu",
190 tst_name, cnt_name, before_cnt, after_cnt);
191 }
192 synchronize_threads(); /* 3: verified => closed */
193 close(sk);
194 }
195
196 static void *client_fn(void *arg)
197 {
198 unsigned int port = test_server_port;
199 struct tcp_sock_state tcp_img;
200 struct tcp_ao_repair ao_img;
201 sockaddr_af saddr;
202
203 test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
204 test_sk_restore("TCP-AO migrate to another socket", port++,
205 &saddr, &tcp_img, &ao_img, 0, TEST_CNT_GOOD);
206
207 test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
208 ao_img.snt_isn += 1;
209 test_sk_restore("TCP-AO with wrong send ISN", port++,
210 &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT, TEST_CNT_BAD);
211
212 test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
213 ao_img.rcv_isn += 1;
214 test_sk_restore("TCP-AO with wrong receive ISN", port++,
215 &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT, TEST_CNT_BAD);
216
217 test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
218 ao_img.snd_sne += 1;
219 test_sk_restore("TCP-AO with wrong send SEQ ext number", port++,
220 &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT,
221 TEST_CNT_NS_BAD | TEST_CNT_GOOD);
222
223 test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
224 ao_img.rcv_sne += 1;
225 test_sk_restore("TCP-AO with wrong receive SEQ ext number", port++,
226 &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT,
227 TEST_CNT_NS_GOOD | TEST_CNT_BAD);
228
229 return NULL;
230 }
231
232 int main(int argc, char *argv[])
233 {
234 test_init(20, server_fn, client_fn);
235 return 0;
236 }
237
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.