File: test-poll.c

package info (click to toggle)
libprelude 1.0.0-11.9
  • links: PTS
  • area: main
  • in suites: stretch
  • size: 24,456 kB
  • ctags: 17,851
  • sloc: ansic: 190,841; cpp: 38,769; xml: 30,141; sh: 11,668; makefile: 692; python: 481; awk: 341; yacc: 238; lex: 186; perl: 5
file content (380 lines) | stat: -rw-r--r-- 8,309 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
/* Test of poll() function.
   Copyright (C) 2008-2010 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Written by Paolo Bonzini.  */

#include <config.h>

#include <poll.h>

#include "signature.h"
SIGNATURE_CHECK (poll, int, (struct pollfd[], nfds_t, int));

#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/ioctl.h>
#include <errno.h>

#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
# define WIN32_NATIVE
#endif

#ifdef WIN32_NATIVE
#include <io.h>
#define pipe(x) _pipe(x, 256, O_BINARY)
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif

#ifndef SO_REUSEPORT
#define SO_REUSEPORT    SO_REUSEADDR
#endif

#define TEST_PORT       12345


/* Minimal testing infrastructure.  */

static int failures;

static void
failed (const char *reason)
{
  if (++failures > 1)
    printf ("  ");
  printf ("failed (%s)\n", reason);
}

static int
test (void (*fn) (void), const char *msg)
{
  failures = 0;
  printf ("%s... ", msg);
  fflush (stdout);
  fn ();

  if (!failures)
    printf ("passed\n");

  return failures;
}


/* Funny socket code.  */

static int
open_server_socket ()
{
  int s, x;
  struct sockaddr_in ia;

  s = socket (AF_INET, SOCK_STREAM, 0);

  memset (&ia, 0, sizeof (ia));
  ia.sin_family = AF_INET;
  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
  ia.sin_port = htons (TEST_PORT);

  x = 1;
  setsockopt (s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof (x));

  if (bind (s, (struct sockaddr *) &ia, sizeof (ia)) < 0)
    {
      perror ("bind");
      exit (77);
    }

  if (listen (s, 1) < 0)
    {
      perror ("listen");
      exit (77);
    }

  return s;
}

static int
connect_to_socket (int blocking)
{
  int s;
  struct sockaddr_in ia;

  s = socket (AF_INET, SOCK_STREAM, 0);

  memset (&ia, 0, sizeof (ia));
  ia.sin_family = AF_INET;
  inet_pton (AF_INET, "127.0.0.1", &ia.sin_addr);
  ia.sin_port = htons (TEST_PORT);

  if (!blocking)
    {
#ifdef WIN32_NATIVE
      unsigned long iMode = 1;
      ioctl (s, FIONBIO, (char *) &iMode);

#elif defined F_GETFL
      int oldflags = fcntl (s, F_GETFL, NULL);

      if (!(oldflags & O_NONBLOCK))
        fcntl (s, F_SETFL, oldflags | O_NONBLOCK);
#endif
    }

  if (connect (s, (struct sockaddr *) &ia, sizeof (ia)) < 0
      && (blocking || errno != EINPROGRESS))
    {
      perror ("connect");
      exit (77);
    }

  return s;
}


/* A slightly more convenient interface to poll(2).  */

static int
poll1 (int fd, int ev, int time)
{
  struct pollfd pfd;
  int r;

  pfd.fd = fd;
  pfd.events = ev;
  pfd.revents = 0;
  r = poll (&pfd, 1, time);
  if (r < 0)
    return r;

  if (pfd.revents & ~(POLLHUP | POLLERR | POLLNVAL | ev))
    failed ("invalid flag combination (unrequested events)");

  return pfd.revents;
}

static int
poll1_nowait (int fd, int ev)
{
  return poll1 (fd, ev, 0);
}

static int
poll1_wait (int fd, int ev)
{
  return poll1 (fd, ev, -1);
}


/* Test poll(2) for TTYs.  */

#ifdef INTERACTIVE
static void
test_tty (void)
{
  if (poll1_nowait (0, POLLIN | POLLRDNORM) != 0)
    failed ("can read");
  if (poll1_nowait (0, POLLOUT) == 0)
    failed ("cannot write");

  if (poll1_wait (0, POLLIN | POLLRDNORM) == 0)
    failed ("return with infinite timeout");

  getchar ();
  if (poll1_nowait (0, POLLIN | POLLRDNORM) != 0)
    failed ("can read after getc");
}
#endif


/* Test poll(2) for unconnected nonblocking sockets.  */

static void
test_connect_first (void)
{
  int s = open_server_socket ();
  struct sockaddr_in ia;
  socklen_t addrlen;

  int c1, c2;

  if (poll1_nowait (s, POLLIN | POLLRDNORM | POLLRDBAND) != 0)
    failed ("can read, socket not connected");

  c1 = connect_to_socket (false);

  if (poll1_wait (s, POLLIN | POLLRDNORM | POLLRDBAND) != (POLLIN | POLLRDNORM))
    failed ("expecting POLLIN | POLLRDNORM on passive socket");
  if (poll1_nowait (s, POLLIN | POLLRDBAND) != POLLIN)
    failed ("expecting POLLIN on passive socket");
  if (poll1_nowait (s, POLLRDNORM | POLLRDBAND) != POLLRDNORM)
    failed ("expecting POLLRDNORM on passive socket");

  addrlen = sizeof (ia);
  c2 = accept (s, (struct sockaddr *) &ia, &addrlen);
  close (s);
  close (c1);
  close (c2);
}


/* Test poll(2) for unconnected blocking sockets.  */

static void
test_accept_first (void)
{
#ifndef WIN32_NATIVE
  int s = open_server_socket ();
  struct sockaddr_in ia;
  socklen_t addrlen;
  char buf[3];
  int c, pid;

  pid = fork ();
  if (pid < 0)
    return;

  if (pid == 0)
    {
      addrlen = sizeof (ia);
      c = accept (s, (struct sockaddr *) &ia, &addrlen);
      close (s);
      write (c, "foo", 3);
      read (c, buf, 3);
      shutdown (c, SHUT_RD);
      close (c);
      exit (0);
    }
  else
    {
      close (s);
      c = connect_to_socket (true);
      if (poll1_nowait (c, POLLOUT | POLLWRNORM | POLLRDBAND)
          != (POLLOUT | POLLWRNORM))
        failed ("cannot write after blocking connect");
      write (c, "foo", 3);
      wait (&pid);
      if (poll1_wait (c, POLLIN) != POLLIN)
        failed ("cannot read data left in the socket by closed process");
      read (c, buf, 3);
      write (c, "foo", 3);
      sleep(1); /* :XXX: race condition in test */
      if ((poll1_wait (c, POLLIN | POLLOUT) & (POLLHUP | POLLERR)) == 0)
        failed ("expecting POLLHUP after shutdown");
      close (c);
    }
#endif
}


/* Common code for pipes and connected sockets.  */

static void
test_pair (int rd, int wd)
{
  char buf[3];
  if (poll1_wait (wd, POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM | POLLRDBAND)
      != (POLLOUT | POLLWRNORM))
    failed ("expecting POLLOUT | POLLWRNORM before writing");
  if (poll1_nowait (wd, POLLIN | POLLRDNORM | POLLOUT | POLLRDBAND) != POLLOUT)
    failed ("expecting POLLOUT before writing");
  if (poll1_nowait (wd, POLLIN | POLLRDNORM | POLLWRNORM | POLLRDBAND)
      != POLLWRNORM)
    failed ("expecting POLLWRNORM before writing");

  write (wd, "foo", 3);
  if (poll1_wait (rd, POLLIN | POLLRDNORM) != (POLLIN | POLLRDNORM))
    failed ("expecting POLLIN | POLLRDNORM after writing");
  if (poll1_nowait (rd, POLLIN) != POLLIN)
    failed ("expecting POLLIN after writing");
  if (poll1_nowait (rd, POLLRDNORM) != POLLRDNORM)
    failed ("expecting POLLRDNORM after writing");

  read (rd, buf, 3);
}


/* Test poll(2) on connected sockets.  */

static void
test_socket_pair (void)
{
  struct sockaddr_in ia;

  socklen_t addrlen = sizeof (ia);
  int s = open_server_socket ();
  int c1 = connect_to_socket (false);
  int c2 = accept (s, (struct sockaddr *) &ia, &addrlen);

  close (s);

  test_pair (c1, c2);
  close (c1);
  write (c2, "foo", 3);
  sleep(1); /* :XXX: race condition in test */
  if ((poll1_nowait (c2, POLLIN | POLLOUT) & (POLLHUP | POLLERR)) == 0)
    failed ("expecting POLLHUP after shutdown");

  close (c2);
}


/* Test poll(2) on pipes.  */

static void
test_pipe (void)
{
  int fd[2];

  pipe (fd);
  test_pair (fd[0], fd[1]);
  close (fd[0]);
  if ((poll1_wait (fd[1], POLLIN | POLLOUT) & (POLLHUP | POLLERR)) == 0)
    failed ("expecting POLLHUP after shutdown");

  close (fd[1]);
}


/* Do them all.  */

int
main ()
{
  int result;

#ifdef INTERACTIVE
  printf ("Please press Enter\n");
  test (test_tty, "TTY");
#endif

  result = test (test_connect_first, "Unconnected socket test");
  result += test (test_socket_pair, "Connected sockets test");
  result += test (test_accept_first, "General socket test with fork");
  result += test (test_pipe, "Pipe test");

  exit (result);
}