1 /*-
2 * Copyright (c) 2004 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/types.h>
28 #include <sys/module.h>
29 #include <sys/socket.h>
30
31 #include <netinet/in.h>
32
33 #include <err.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #define ACCF_NAME "dataready"
42
43 /*
44 * A number of small tests to confirm that attaching ACCF_DATA accept filters
45 * to inet4 ports works as expected. We test:
46 *
47 * - That no accept filter is attached on a newly created socket.
48 * - That bind() has no affect on the accept filter state.
49 * - That we can't attach an accept filter to a socket that isn't in the
50 * listen state.
51 * - That after we fail to attach the filter, querying the kernel shows no
52 * filter attached.
53 * - That we can attach an accept filter to a socket that is in the listen
54 * state.
55 * - That once an accept filter is attached, we can query to make sure it is
56 * attached.
57 * - That once an accept filter is attached, we can remove it and query to
58 * make sure it is removed.
59 */
60 int
main(void)61 main(void)
62 {
63 struct accept_filter_arg afa;
64 struct sockaddr_in sin;
65 struct linger linger;
66 socklen_t len;
67 int lso, so, i, ret;
68
69 /* XXX: PLAIN_TEST_REQUIRE_MODULE "backport" for stable/9 */
70 const char *_mod_name = "accf_data";
71
72 if (modfind(_mod_name) == -1) {
73 printf("1..0 # SKIP - module %s could not be resolved: %s\n",
74 _mod_name, strerror(errno));
75 _exit(0);
76 }
77 /* XXX: PLAIN_TEST_REQUIRE_MODULE for stable/9 */
78
79 printf("1..12\n");
80
81 /*
82 * Step 0. Open socket().
83 */
84 lso = socket(PF_INET, SOCK_STREAM, 0);
85 if (lso == -1)
86 errx(-1, "not ok 1 - socket: %s", strerror(errno));
87 printf("ok 1 - socket\n");
88
89 /*
90 * Step 1. After socket(). Should return EINVAL, since no accept
91 * filter should be attached.
92 */
93 bzero(&afa, sizeof(afa));
94 len = sizeof(afa);
95 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
96 if (ret != -1)
97 errx(-1, "not ok 2 - getsockopt() after socket() succeeded");
98 if (errno != EINVAL)
99 errx(-1, "not ok 2 - getsockopt() after socket() failed with "
100 "%d (%s)", errno, strerror(errno));
101 printf("ok 2 - getsockopt\n");
102
103 /*
104 * Step 2. Bind(). Ideally this will succeed.
105 */
106 setsockopt(lso, SOL_SOCKET, SO_REUSEADDR, &lso, sizeof(lso));
107 bzero(&sin, sizeof(sin));
108 sin.sin_len = sizeof(sin);
109 sin.sin_family = AF_INET;
110 sin.sin_port = htons(8080);
111 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
112 if (bind(lso, (struct sockaddr *)&sin, sizeof(sin)) < 0)
113 errx(-1, "not ok 3 - bind %s", strerror(errno));
114 printf("ok 3 - bind\n");
115
116 /*
117 * Step 3: After bind(). getsockopt() should return EINVAL, since no
118 * accept filter should be attached.
119 */
120 len = sizeof(afa);
121 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
122 if (ret != -1)
123 errx(-1, "not ok 4 - getsockopt() after bind() succeeded");
124 if (errno != EINVAL)
125 errx(-1, "not ok 4 - getsockopt() after bind() failed with %d (%s)",
126 errno, strerror(errno));
127 printf("ok 4 - getsockopt\n");
128
129 /*
130 * Step 4: Setsockopt() before listen(). Should fail, since it's not
131 * yet a listen() socket.
132 */
133 bzero(&afa, sizeof(afa));
134 strncpy(afa.af_name, ACCF_NAME, sizeof(afa.af_name));
135 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
136 if (ret == 0)
137 errx(-1, "not ok 5 - setsockopt() before listen() succeeded");
138 printf("ok 5 - setsockopt\n");
139
140 /*
141 * Step 5: Getsockopt() after pre-listen() setsockopt(). Should
142 * fail with EINVAL, since setsockopt() should have failed.
143 */
144 len = sizeof(afa);
145 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
146 if (ret == 0)
147 errx(-1, "not ok 6 - getsockopt() after pre-listen() setsockopt() "
148 "succeeded");
149 if (errno != EINVAL)
150 errx(-1, "not ok 6 - pre-listen() getsockopt() failed with %d (%s)",
151 errno, strerror(errno));
152 printf("ok 6 - getsockopt\n");
153
154 /*
155 * Step 6: listen().
156 */
157 if (listen(lso, -1) < 0)
158 errx(-1, "not ok 7 - listen: %s", strerror(errno));
159 printf("ok 7 - listen\n");
160
161 /*
162 * Step 7: Getsockopt() after listen(). Should fail with EINVAL,
163 * since we have not installed accept filter yet.
164 */
165 len = sizeof(afa);
166 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
167 if (ret == 0)
168 errx(-1, "not ok 8 - getsockopt() after listen() but before "
169 "setsockopt() succeeded");
170 if (errno != EINVAL)
171 errx(-1, "not ok 8 - getsockopt() after listen() but before "
172 "setsockopt() failed with %d (%s)", errno, strerror(errno));
173 printf("ok 8 - getsockopt\n");
174
175 /*
176 * Step 8: After listen(). This call to setsockopt() should succeed.
177 */
178 bzero(&afa, sizeof(afa));
179 strncpy(afa.af_name, ACCF_NAME, sizeof(afa.af_name));
180 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
181 if (ret != 0)
182 errx(-1, "not ok 9 - setsockopt() after listen() failed with %d "
183 "(%s)", errno, strerror(errno));
184 printf("ok 9 - setsockopt\n");
185
186 /*
187 * Step 9: After setsockopt(). Should succeed and identify
188 * ACCF_NAME.
189 */
190 bzero(&afa, sizeof(afa));
191 len = sizeof(afa);
192 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
193 if (ret != 0)
194 errx(-1, "not ok 10 - getsockopt() after listen() setsockopt() "
195 "failed with %d (%s)", errno, strerror(errno));
196 if (len != sizeof(afa))
197 errx(-1, "not ok 10 - getsockopt() after setsockopet() after "
198 "listen() returned wrong size (got %d expected %zd)", len,
199 sizeof(afa));
200 if (strcmp(afa.af_name, ACCF_NAME) != 0)
201 errx(-1, "not ok 10 - getsockopt() after setsockopt() after "
202 "listen() mismatch (got %s expected %s)", afa.af_name,
203 ACCF_NAME);
204 printf("ok 10 - getsockopt\n");
205
206 /*
207 * Step 10: Set listening socket to non blocking mode. Open
208 * connection to our listening socket and try to accept. Should
209 * no succeed. Write a byte of data and try again. Should accept.
210 */
211 i = fcntl(lso, F_GETFL);
212 if (i < 0)
213 errx(-1, "not ok 11 - ioctl(F_GETFL): %s", strerror(errno));
214 i |= O_NONBLOCK;
215 if (fcntl(lso, F_SETFL, i) != 0)
216 errx(-1, "not ok 11 - ioctl(F_SETFL): %s", strerror(errno));
217 so = socket(PF_INET, SOCK_STREAM, 0);
218 if (so == -1)
219 errx(-1, "not ok 11 - socket: %s", strerror(errno));
220 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0)
221 errx(-1, "not ok 11 - connect %s", strerror(errno));
222 if (accept(lso, NULL, 0) != -1 && errno != EWOULDBLOCK)
223 errx(-1, "not ok 11 - accept #1 %s", strerror(errno));
224 if (write(so, "0", 1) != 1)
225 errx(-1, "not ok 11 - write %s", strerror(errno));
226 /*
227 * XXXGL: ugly, but we need to make sure that our write reaches
228 * remote side of the socket.
229 */
230 usleep(10000);
231 if (accept(lso, NULL, 0) < 1)
232 errx(-1, "not ok 11 - accept #2 %s", strerror(errno));
233 if (close(so) != 0)
234 errx(-1, "not ok 11 - close(): %s", strerror(errno));
235 printf("ok 11 - accept\n");
236
237 /*
238 * Step 12: reset connection before accept filter allows it.
239 * In this case the connection must make it to the listen
240 * queue, but with ECONNABORTED code.
241 */
242 so = socket(PF_INET, SOCK_STREAM, 0);
243 if (so == -1)
244 errx(-1, "not ok 12 - socket: %s", strerror(errno));
245 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0)
246 errx(-1, "not ok 12 - connect %s", strerror(errno));
247 linger.l_onoff = 1;
248 linger.l_linger = 0;
249 ret = setsockopt(so, SOL_SOCKET, SO_LINGER, &linger, sizeof(linger));
250 if (ret != 0)
251 errx(-1, "not ok 12 - setsockopt(SO_LINGER) failed with %d "
252 "(%s)", errno, strerror(errno));
253 if (close(so) != 0)
254 errx(-1, "not ok 12 - close(): %s", strerror(errno));
255 if (accept(lso, NULL, 0) != -1 && errno != ECONNABORTED)
256 errx(-1, "not ok 12 - accept #3 %s", strerror(errno));
257 printf("ok 12 - accept\n");
258
259 #if 1
260 /*
261 * XXXGL: this doesn't belong to the test itself, but is known
262 * to examine rarely examined paths in the kernel. Intentionally
263 * leave a socket on the incomplete queue, before the program
264 * exits.
265 */
266 so = socket(PF_INET, SOCK_STREAM, 0);
267 if (so == -1)
268 errx(-1, "not ok 13 - socket: %s", strerror(errno));
269 if (connect(so, (struct sockaddr *)&sin, sizeof(sin)) < 0)
270 errx(-1, "not ok 13 - connect %s", strerror(errno));
271 #endif
272
273 /*
274 * Step 12: Remove accept filter. After removing the accept filter
275 * getsockopt() should fail with EINVAL.
276 */
277 ret = setsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, NULL, 0);
278 if (ret != 0)
279 errx(-1, "not ok 13 - setsockopt() after listen() "
280 "failed with %d (%s)", errno, strerror(errno));
281 bzero(&afa, sizeof(afa));
282 len = sizeof(afa);
283 ret = getsockopt(lso, SOL_SOCKET, SO_ACCEPTFILTER, &afa, &len);
284 if (ret == 0)
285 errx(-1, "not ok 13 - getsockopt() after removing "
286 "the accept filter returns valid accept filter %s",
287 afa.af_name);
288 if (errno != EINVAL)
289 errx(-1, "not ok 13 - getsockopt() after removing the accept"
290 "filter failed with %d (%s)", errno, strerror(errno));
291 if (close(lso) != 0)
292 errx(-1, "not ok 13 - close() of listening socket: %s",
293 strerror(errno));
294 printf("ok 13 - setsockopt\n");
295
296 return (0);
297 }
298