sendfile.c revision 168854 
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 168854 2007-04-19 06:01:08Z pjd $
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 <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43/*
44 * Simple regression test for sendfile.  Creates a file sized at three pages
45 * and then proceeds to send it over a series of sockets, exercising a number
46 * of cases and performing limited validation.
47 */
48
49#define	TEST_PORT	5678
50#define	TEST_MAGIC	0x4440f7bb
51#define	TEST_PAGES	4
52#define	TEST_SECONDS	30
53
54struct test_header {
55	u_int32_t	th_magic;
56	u_int32_t	th_header_length;
57	u_int32_t	th_offset;
58	u_int32_t	th_length;
59};
60
61pid_t	child_pid, parent_pid;
62int	listen_socket;
63int	file_fd;
64
65static int
66test_th(struct test_header *th, u_int32_t *header_length, u_int32_t *offset,
67    u_int32_t *length)
68{
69
70	if (th->th_magic != htonl(TEST_MAGIC))
71		return (0);
72	*header_length = ntohl(th->th_header_length);
73	*offset = ntohl(th->th_offset);
74	*length = ntohl(th->th_length);
75	return (1);
76}
77
78static void
79signal_alarm(int signum)
80{
81
82}
83
84static void
85setup_alarm(int seconds)
86{
87
88	signal(SIGALRM, signal_alarm);
89	alarm(seconds);
90}
91
92static void
93cancel_alarm(void)
94{
95
96	alarm(0);
97	signal(SIGALRM, SIG_DFL);
98}
99
100static void
101receive_test(int accept_socket)
102{
103	u_int32_t header_length, offset, length, counter;
104	struct test_header th;
105	ssize_t len;
106	char ch;
107
108	len = read(accept_socket, &th, sizeof(th));
109	if (len < 0)
110		err(-1, "read");
111	if (len < sizeof(th))
112		errx(-1, "read: %d", len);
113
114	if (test_th(&th, &header_length, &offset, &length) == 0)
115		errx(-1, "test_th: bad");
116
117	counter = 0;
118	while (1) {
119		len = read(accept_socket, &ch, sizeof(ch));
120		if (len < 0)
121			err(-1, "read");
122		if (len == 0)
123			break;
124		counter++;
125		/* XXXRW: Validate byte here. */
126	}
127	if (counter != header_length + length)
128		errx(-1, "receive_test: expected (%d, %d) received %d",
129		    header_length, length, counter);
130}
131
132static void
133run_child(void)
134{
135	int accept_socket;
136
137	while (1) {
138		accept_socket = accept(listen_socket, NULL, NULL);
139		setup_alarm(TEST_SECONDS);
140		receive_test(accept_socket);
141		cancel_alarm();
142		close(accept_socket);
143	}
144}
145
146static int
147new_test_socket(void)
148{
149	struct sockaddr_in sin;
150	int connect_socket;
151
152	connect_socket = socket(PF_INET, SOCK_STREAM, 0);
153	if (connect_socket < 0)
154		err(-1, "socket");
155
156	bzero(&sin, sizeof(sin));
157	sin.sin_len = sizeof(sin);
158	sin.sin_family = AF_INET;
159	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
160	sin.sin_port = htons(TEST_PORT);
161
162	if (connect(connect_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
163		err(-1, "connect");
164
165	return (connect_socket);
166}
167
168static void
169init_th(struct test_header *th, u_int32_t header_length, u_int32_t offset,
170    u_int32_t length)
171{
172
173	bzero(th, sizeof(*th));
174	th->th_magic = htonl(TEST_MAGIC);
175	th->th_header_length = htonl(header_length);
176	th->th_offset = htonl(offset);
177	th->th_length = htonl(length);
178}
179
180static void
181send_test(int connect_socket, u_int32_t header_length, u_int32_t offset,
182    u_int32_t length)
183{
184	struct test_header th;
185	struct sf_hdtr hdtr, *hdtrp;
186	struct iovec headers;
187	char *header;
188	ssize_t len;
189	off_t off;
190
191	len = lseek(file_fd, 0, SEEK_SET);
192	if (len < 0)
193		err(-1, "lseek");
194	if (len != 0)
195		errx(-1, "lseek: %d", len);
196
197	init_th(&th, header_length, offset, length);
198
199	len = write(connect_socket, &th, sizeof(th));
200	if (len < 0)
201		err(-1, "send");
202	if (len != sizeof(th))
203		err(-1, "send: %d", len);
204
205	if (header_length != 0) {
206		header = malloc(header_length);
207		if (header == NULL)
208			err(-1, "malloc");
209		hdtrp = &hdtr;
210		bzero(&headers, sizeof(headers));
211		headers.iov_base = header;
212		headers.iov_len = header_length;
213		bzero(&hdtr, sizeof(hdtr));
214		hdtr.headers = &headers;
215		hdtr.hdr_cnt = 1;
216		hdtr.trailers = NULL;
217		hdtr.trl_cnt = 0;
218	} else {
219		hdtrp = NULL;
220		header = NULL;
221	}
222
223	if (sendfile(file_fd, connect_socket, offset, length, hdtrp, &off,
224	    0) < 0)
225		err(-1, "sendfile");
226
227	if (length == 0) {
228		struct stat sb;
229
230		if (fstat(file_fd, &sb) < 0)
231			err(-1, "fstat");
232		length = sb.st_size;
233	}
234
235	if (off != length) {
236		errx(-1, "sendfile: off(%llu) != length(%llu)", off,
237		    (unsigned long long)length);
238	}
239
240	if (header != NULL)
241		free(header);
242}
243
244static void
245run_parent(void)
246{
247	int connect_socket;
248
249	connect_socket = new_test_socket();
250	send_test(connect_socket, 0, 0, 1);
251	close(connect_socket);
252
253	sleep(1);
254
255	connect_socket = new_test_socket();
256	send_test(connect_socket, 0, 0, getpagesize());
257	close(connect_socket);
258
259	sleep(1);
260
261	connect_socket = new_test_socket();
262	send_test(connect_socket, 0, 1, 1);
263	close(connect_socket);
264
265	sleep(1);
266
267	connect_socket = new_test_socket();
268	send_test(connect_socket, 0, 1, getpagesize());
269	close(connect_socket);
270
271	sleep(1);
272
273	connect_socket = new_test_socket();
274	send_test(connect_socket, 0, getpagesize(), getpagesize());
275	close(connect_socket);
276
277	sleep(1);
278
279	connect_socket = new_test_socket();
280	send_test(connect_socket, 0, 0, 2 * getpagesize());
281	close(connect_socket);
282
283	sleep(1);
284
285	connect_socket = new_test_socket();
286	send_test(connect_socket, 0, 0, 0);
287	close(connect_socket);
288
289	sleep(1);
290
291	connect_socket = new_test_socket();
292	send_test(connect_socket, 0, getpagesize(), 0);
293	close(connect_socket);
294
295	sleep(1);
296
297	connect_socket = new_test_socket();
298	send_test(connect_socket, 0, 2 * getpagesize(), 0);
299	close(connect_socket);
300
301	sleep(1);
302
303	(void)kill(child_pid, SIGKILL);
304}
305
306int
307main(int argc, char *argv[])
308{
309	char path[PATH_MAX], *page_buffer;
310	struct sockaddr_in sin;
311	int pagesize;
312	ssize_t len;
313
314	pagesize = getpagesize();
315	page_buffer = malloc(TEST_PAGES * pagesize);
316	if (page_buffer == NULL)
317		err(-1, "malloc");
318	bzero(page_buffer, TEST_PAGES * pagesize);
319
320	listen_socket = socket(PF_INET, SOCK_STREAM, 0);
321	if (listen_socket < 0)
322		err(-1, "socket");
323
324	bzero(&sin, sizeof(sin));
325	sin.sin_len = sizeof(sin);
326	sin.sin_family = AF_INET;
327	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
328	sin.sin_port = htons(TEST_PORT);
329
330	snprintf(path, PATH_MAX, "/tmp/sendfile.XXXXXXXXXXXX");
331	file_fd = mkstemp(path);
332	(void)unlink(path);
333
334	len = write(file_fd, page_buffer, TEST_PAGES * pagesize);
335	if (len < 0)
336		err(-1, "write");
337
338	len = lseek(file_fd, 0, SEEK_SET);
339	if (len < 0)
340		err(-1, "lseek");
341	if (len != 0)
342		errx(-1, "lseek: %d", len);
343
344	if (bind(listen_socket, (struct sockaddr *)&sin, sizeof(sin)) < 0)
345		err(-1, "bind");
346
347	if (listen(listen_socket, -1) < 0)
348		err(-1, "listen");
349
350	parent_pid = getpid();
351	child_pid = fork();
352	if (child_pid < 0)
353		err(-1, "fork");
354	if (child_pid == 0) {
355		child_pid = getpid();
356		run_child();
357	} else
358		run_parent();
359
360	return (0);
361}
362