sendfile.c revision 168855 
1/*-
2 * Copyright (c) 2006 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 * $FreeBSD: head/tools/regression/sockets/sendfile/sendfile.c 168855 2007-04-19 07:59:30Z des $
27 */
28
29#include <sys/types.h>
30#include <sys/socket.h>
31#include <sys/stat.h>
32
33#include <netinet/in.h>
34
35#include <err.h>
36#include <limits.h>
37#include <signal.h>
38#include <stdint.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <unistd.h>
43
44/*
45 * Simple regression test for sendfile.  Creates a file sized at three pages
46 * and then proceeds to send it over a series of sockets, exercising a number
47 * of cases and performing limited validation.
48 */
49
50#define	TEST_PORT	5678
51#define	TEST_MAGIC	0x4440f7bb
52#define	TEST_PAGES	4
53#define	TEST_SECONDS	30
54
55struct test_header {
56	u_int32_t	th_magic;
57	u_int32_t	th_header_length;
58	u_int32_t	th_offset;
59	u_int32_t	th_length;
60};
61
62pid_t	child_pid, parent_pid;
63int	listen_socket;
64int	file_fd;
65
66static int
67test_th(struct test_header *th, u_int32_t *header_length, u_int32_t *offset,
68    u_int32_t *length)
69{
70
71	if (th->th_magic != htonl(TEST_MAGIC))
72		return (0);
73	*header_length = ntohl(th->th_header_length);
74	*offset = ntohl(th->th_offset);
75	*length = ntohl(th->th_length);
76	return (1);
77}
78
79static void
80signal_alarm(int signum)
81{
82
83	(void)signum;
84}
85
86static void
87setup_alarm(int seconds)
88{
89
90	signal(SIGALRM, signal_alarm);
91	alarm(seconds);
92}
93
94static void
95cancel_alarm(void)
96{
97
98	alarm(0);
99	signal(SIGALRM, SIG_DFL);
100}
101
102static void
103receive_test(int accept_socket)
104{
105	u_int32_t header_length, offset, length, counter;
106	struct test_header th;
107	ssize_t len;
108	char ch;
109
110	len = read(accept_socket, &th, sizeof(th));
111	if (len < 0)
112		err(1, "read");
113	if ((size_t)len < sizeof(th))
114		errx(1, "read: %zd", len);
115
116	if (test_th(&th, &header_length, &offset, &length) == 0)
117		errx(1, "test_th: bad");
118
119	counter = 0;
120	while (1) {
121		len = read(accept_socket, &ch, sizeof(ch));
122		if (len < 0)
123			err(1, "read");
124		if (len == 0)
125			break;
126		counter++;
127		/* XXXRW: Validate byte here. */
128	}
129	if (counter != header_length + length)
130		errx(1, "receive_test: expected (%d, %d) received %d",
131		    header_length, length, counter);
132}
133
134static void
135run_child(void)
136{
137	int accept_socket;
138
139	while (1) {
140		accept_socket = accept(listen_socket, NULL, NULL);
141		setup_alarm(TEST_SECONDS);
142		receive_test(accept_socket);
143		cancel_alarm();
144		close(accept_socket);
145	}
146}
147
148static int
149new_test_socket(void)
150{
151	struct sockaddr_in sin;
152	int connect_socket;
153
154	connect_socket = socket(PF_INET, SOCK_STREAM, 0);
155	if (connect_socket < 0)
156		err(1, "socket");
157
158	bzero(&sin, sizeof(sin));
159	sin.sin_len = sizeof(sin);
160	sin.sin_family = AF_INET;
161	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
162	sin.sin_port = htons(TEST_PORT);
163
164	if (connect(connect_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
165		err(1, "connect");
166
167	return (connect_socket);
168}
169
170static void
171init_th(struct test_header *th, u_int32_t header_length, u_int32_t offset,
172    u_int32_t length)
173{
174
175	bzero(th, sizeof(*th));
176	th->th_magic = htonl(TEST_MAGIC);
177	th->th_header_length = htonl(header_length);
178	th->th_offset = htonl(offset);
179	th->th_length = htonl(length);
180}
181
182static void
183send_test(int connect_socket, u_int32_t header_length, u_int32_t offset,
184    u_int32_t length)
185{
186	struct test_header th;
187	struct sf_hdtr hdtr, *hdtrp;
188	struct iovec headers;
189	char *header;
190	ssize_t len;
191	off_t off;
192
193	len = lseek(file_fd, 0, SEEK_SET);
194	if (len < 0)
195		err(1, "lseek");
196	if (len != 0)
197		errx(1, "lseek: %zd", len);
198
199	init_th(&th, header_length, offset, length);
200
201	len = write(connect_socket, &th, sizeof(th));
202	if (len < 0)
203		err(1, "send");
204	if (len != sizeof(th))
205		err(1, "send: %zd", len);
206
207	if (header_length != 0) {
208		header = malloc(header_length);
209		if (header == NULL)
210			err(1, "malloc");
211		hdtrp = &hdtr;
212		bzero(&headers, sizeof(headers));
213		headers.iov_base = header;
214		headers.iov_len = header_length;
215		bzero(&hdtr, sizeof(hdtr));
216		hdtr.headers = &headers;
217		hdtr.hdr_cnt = 1;
218		hdtr.trailers = NULL;
219		hdtr.trl_cnt = 0;
220	} else {
221		hdtrp = NULL;
222		header = NULL;
223	}
224
225	if (sendfile(file_fd, connect_socket, offset, length, hdtrp, &off,
226	    0) < 0)
227		err(1, "sendfile");
228
229	if (length == 0) {
230		struct stat sb;
231
232		if (fstat(file_fd, &sb) < 0)
233			err(1, "fstat");
234		length = sb.st_size;
235	}
236
237	if (off != length) {
238		errx(1, "sendfile: off(%ju) != length(%ju)",
239		    (uintmax_t)off, (uintmax_t)length);
240	}
241
242	if (header != NULL)
243		free(header);
244}
245
246static void
247run_parent(void)
248{
249	int connect_socket;
250
251	connect_socket = new_test_socket();
252	send_test(connect_socket, 0, 0, 1);
253	close(connect_socket);
254
255	sleep(1);
256
257	connect_socket = new_test_socket();
258	send_test(connect_socket, 0, 0, getpagesize());
259	close(connect_socket);
260
261	sleep(1);
262
263	connect_socket = new_test_socket();
264	send_test(connect_socket, 0, 1, 1);
265	close(connect_socket);
266
267	sleep(1);
268
269	connect_socket = new_test_socket();
270	send_test(connect_socket, 0, 1, getpagesize());
271	close(connect_socket);
272
273	sleep(1);
274
275	connect_socket = new_test_socket();
276	send_test(connect_socket, 0, getpagesize(), getpagesize());
277	close(connect_socket);
278
279	sleep(1);
280
281	connect_socket = new_test_socket();
282	send_test(connect_socket, 0, 0, 2 * getpagesize());
283	close(connect_socket);
284
285	sleep(1);
286
287	connect_socket = new_test_socket();
288	send_test(connect_socket, 0, 0, 0);
289	close(connect_socket);
290
291	sleep(1);
292
293	connect_socket = new_test_socket();
294	send_test(connect_socket, 0, getpagesize(), 0);
295	close(connect_socket);
296
297	sleep(1);
298
299	connect_socket = new_test_socket();
300	send_test(connect_socket, 0, 2 * getpagesize(), 0);
301	close(connect_socket);
302
303	sleep(1);
304
305	(void)kill(child_pid, SIGKILL);
306}
307
308int
309main(void)
310{
311	char path[PATH_MAX], *page_buffer;
312	struct sockaddr_in sin;
313	int pagesize;
314	ssize_t len;
315
316	pagesize = getpagesize();
317	page_buffer = malloc(TEST_PAGES * pagesize);
318	if (page_buffer == NULL)
319		err(1, "malloc");
320	bzero(page_buffer, TEST_PAGES * pagesize);
321
322	listen_socket = socket(PF_INET, SOCK_STREAM, 0);
323	if (listen_socket < 0)
324		err(1, "socket");
325
326	bzero(&sin, sizeof(sin));
327	sin.sin_len = sizeof(sin);
328	sin.sin_family = AF_INET;
329	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
330	sin.sin_port = htons(TEST_PORT);
331
332	snprintf(path, PATH_MAX, "/tmp/sendfile.XXXXXXXXXXXX");
333	file_fd = mkstemp(path);
334	(void)unlink(path);
335
336	len = write(file_fd, page_buffer, TEST_PAGES * pagesize);
337	if (len < 0)
338		err(1, "write");
339
340	len = lseek(file_fd, 0, SEEK_SET);
341	if (len < 0)
342		err(1, "lseek");
343	if (len != 0)
344		errx(1, "lseek: %zd", len);
345
346	if (bind(listen_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
347		err(1, "bind");
348
349	if (listen(listen_socket, -1) < 0)
350		err(1, "listen");
351
352	parent_pid = getpid();
353	child_pid = fork();
354	if (child_pid < 0)
355		err(1, "fork");
356	if (child_pid == 0) {
357		child_pid = getpid();
358		run_child();
359	} else
360		run_parent();
361
362	return (0);
363}
364