xref: /freebsd/tools/regression/sockets/accf_data_attach/accf_data_attach.c (revision b3e7694832e81d7a904a10f525f8797b753bf0d3)
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