1 // SPDX-License-Identifier: GPL-2.0
2 /* Check that after SEQ number wrap-around:
3 * 1. SEQ-extension has upper bytes set
4 * 2. TCP conneciton is alive and no TCPAOBad segments
5 * In order to test (2), the test doesn't just adjust seq number for a queue
6 * on a connected socket, but migrates it to another sk+port number, so
7 * that there won't be any delayed packets that will fail to verify
8 * with the new SEQ numbers.
9 */
10 #include <inttypes.h>
11 #include "aolib.h"
12
13 const unsigned int nr_packets = 1000;
14 const unsigned int msg_len = 1000;
15 const unsigned int quota = nr_packets * msg_len;
16 unsigned int client_new_port;
17
18 /* Move them closer to roll-over */
19 static void test_adjust_seqs(struct tcp_sock_state *img,
20 struct tcp_ao_repair *ao_img,
21 bool server)
22 {
23 uint32_t new_seq1, new_seq2;
24
25 /* make them roll-over during quota, but on different segments */
26 if (server) {
27 new_seq1 = ((uint32_t)-1) - msg_len;
28 new_seq2 = ((uint32_t)-1) - (quota - 2 * msg_len);
29 } else {
30 new_seq1 = ((uint32_t)-1) - (quota - 2 * msg_len);
31 new_seq2 = ((uint32_t)-1) - msg_len;
32 }
33
34 img->in.seq = new_seq1;
35 img->trw.snd_wl1 = img->in.seq - msg_len;
36 img->out.seq = new_seq2;
37 img->trw.rcv_wup = img->in.seq;
38 }
39
40 static int test_sk_restore(struct tcp_sock_state *img,
41 struct tcp_ao_repair *ao_img, sockaddr_af *saddr,
42 const union tcp_addr daddr, unsigned int dport,
43 struct tcp_ao_counters *cnt)
44 {
45 int sk;
46
47 sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
48 if (sk < 0)
49 test_error("socket()");
50
51 test_enable_repair(sk);
52 test_sock_restore(sk, img, saddr, daddr, dport);
53 if (test_add_repaired_key(sk, DEFAULT_TEST_PASSWORD, 0, daddr, -1, 100, 100))
54 test_error("setsockopt(TCP_AO_ADD_KEY)");
55 test_ao_restore(sk, ao_img);
56
57 if (test_get_tcp_ao_counters(sk, cnt))
58 test_error("test_get_tcp_ao_counters()");
59
60 test_disable_repair(sk);
61 test_sock_state_free(img);
62 return sk;
63 }
64
65 static void *server_fn(void *arg)
66 {
67 uint64_t before_good, after_good, after_bad;
68 struct tcp_ao_counters ao1, ao2;
69 struct tcp_sock_state img;
70 struct tcp_ao_repair ao_img;
71 sockaddr_af saddr;
72 ssize_t bytes;
73 int sk, lsk;
74
75 lsk = test_listen_socket(this_ip_addr, test_server_port, 1);
76
77 if (test_add_key(lsk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1, 100, 100))
78 test_error("setsockopt(TCP_AO_ADD_KEY)");
79
80 synchronize_threads(); /* 1: MKT added => connect() */
81
82 if (test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0))
83 test_error("test_wait_fd()");
84
85 sk = accept(lsk, NULL, NULL);
86 if (sk < 0)
87 test_error("accept()");
88
89 synchronize_threads(); /* 2: accepted => send data */
90 close(lsk);
91
92 bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
93 if (bytes != quota) {
94 if (bytes > 0)
95 test_fail("server served: %zd", bytes);
96 else
97 test_fail("server returned: %zd", bytes);
98 goto out;
99 }
100
101 before_good = netstat_get_one("TCPAOGood", NULL);
102
103 synchronize_threads(); /* 3: restore the connection on another port */
104
105 test_enable_repair(sk);
106 test_sock_checkpoint(sk, &img, &saddr);
107 test_ao_checkpoint(sk, &ao_img);
108 test_kill_sk(sk);
109 #ifdef IPV6_TEST
110 saddr.sin6_port = htons(ntohs(saddr.sin6_port) + 1);
111 #else
112 saddr.sin_port = htons(ntohs(saddr.sin_port) + 1);
113 #endif
114 test_adjust_seqs(&img, &ao_img, true);
115 synchronize_threads(); /* 4: dump finished */
116 sk = test_sk_restore(&img, &ao_img, &saddr, this_ip_dest,
117 client_new_port, &ao1);
118
119 synchronize_threads(); /* 5: verify counters during SEQ-number rollover */
120 bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
121 if (bytes != quota) {
122 if (bytes > 0)
123 test_fail("server served: %zd", bytes);
124 else
125 test_fail("server returned: %zd", bytes);
126 } else {
127 test_ok("server alive");
128 }
129
130 if (test_get_tcp_ao_counters(sk, &ao2))
131 test_error("test_get_tcp_ao_counters()");
132 after_good = netstat_get_one("TCPAOGood", NULL);
133
134 test_tcp_ao_counters_cmp(NULL, &ao1, &ao2, TEST_CNT_GOOD);
135
136 if (after_good <= before_good) {
137 test_fail("TCPAOGood counter did not increase: %zu <= %zu",
138 after_good, before_good);
139 } else {
140 test_ok("TCPAOGood counter increased %zu => %zu",
141 before_good, after_good);
142 }
143 after_bad = netstat_get_one("TCPAOBad", NULL);
144 if (after_bad)
145 test_fail("TCPAOBad counter is non-zero: %zu", after_bad);
146 else
147 test_ok("TCPAOBad counter didn't increase");
148 test_enable_repair(sk);
149 test_ao_checkpoint(sk, &ao_img);
150 if (ao_img.snd_sne && ao_img.rcv_sne) {
151 test_ok("SEQ extension incremented: %u/%u",
152 ao_img.snd_sne, ao_img.rcv_sne);
153 } else {
154 test_fail("SEQ extension was not incremented: %u/%u",
155 ao_img.snd_sne, ao_img.rcv_sne);
156 }
157
158 synchronize_threads(); /* 6: verified => closed */
159 out:
160 close(sk);
161 return NULL;
162 }
163
164 static void *client_fn(void *arg)
165 {
166 uint64_t before_good, after_good, after_bad;
167 struct tcp_ao_counters ao1, ao2;
168 struct tcp_sock_state img;
169 struct tcp_ao_repair ao_img;
170 sockaddr_af saddr;
171 int sk;
172
173 sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
174 if (sk < 0)
175 test_error("socket()");
176
177 if (test_add_key(sk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1, 100, 100))
178 test_error("setsockopt(TCP_AO_ADD_KEY)");
179
180 synchronize_threads(); /* 1: MKT added => connect() */
181 if (test_connect_socket(sk, this_ip_dest, test_server_port) <= 0)
182 test_error("failed to connect()");
183
184 synchronize_threads(); /* 2: accepted => send data */
185 if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC)) {
186 test_fail("pre-migrate verify failed");
187 return NULL;
188 }
189
190 before_good = netstat_get_one("TCPAOGood", NULL);
191
192 synchronize_threads(); /* 3: restore the connection on another port */
193 test_enable_repair(sk);
194 test_sock_checkpoint(sk, &img, &saddr);
195 test_ao_checkpoint(sk, &ao_img);
196 test_kill_sk(sk);
197 #ifdef IPV6_TEST
198 client_new_port = ntohs(saddr.sin6_port) + 1;
199 saddr.sin6_port = htons(ntohs(saddr.sin6_port) + 1);
200 #else
201 client_new_port = ntohs(saddr.sin_port) + 1;
202 saddr.sin_port = htons(ntohs(saddr.sin_port) + 1);
203 #endif
204 test_adjust_seqs(&img, &ao_img, false);
205 synchronize_threads(); /* 4: dump finished */
206 sk = test_sk_restore(&img, &ao_img, &saddr, this_ip_dest,
207 test_server_port + 1, &ao1);
208
209 synchronize_threads(); /* 5: verify counters during SEQ-number rollover */
210 if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC))
211 test_fail("post-migrate verify failed");
212 else
213 test_ok("post-migrate connection alive");
214
215 if (test_get_tcp_ao_counters(sk, &ao2))
216 test_error("test_get_tcp_ao_counters()");
217 after_good = netstat_get_one("TCPAOGood", NULL);
218
219 test_tcp_ao_counters_cmp(NULL, &ao1, &ao2, TEST_CNT_GOOD);
220
221 if (after_good <= before_good) {
222 test_fail("TCPAOGood counter did not increase: %zu <= %zu",
223 after_good, before_good);
224 } else {
225 test_ok("TCPAOGood counter increased %zu => %zu",
226 before_good, after_good);
227 }
228 after_bad = netstat_get_one("TCPAOBad", NULL);
229 if (after_bad)
230 test_fail("TCPAOBad counter is non-zero: %zu", after_bad);
231 else
232 test_ok("TCPAOBad counter didn't increase");
233
234 synchronize_threads(); /* 6: verified => closed */
235 close(sk);
236
237 synchronize_threads(); /* don't race to exit: let server exit() */
238 return NULL;
239 }
240
241 int main(int argc, char *argv[])
242 {
243 test_init(7, server_fn, client_fn);
244 return 0;
245 }
246
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