/src/httpd/srclib/apr/poll/unix/select.c
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1 | | /* Licensed to the Apache Software Foundation (ASF) under one or more |
2 | | * contributor license agreements. See the NOTICE file distributed with |
3 | | * this work for additional information regarding copyright ownership. |
4 | | * The ASF licenses this file to You under the Apache License, Version 2.0 |
5 | | * (the "License"); you may not use this file except in compliance with |
6 | | * the License. You may obtain a copy of the License at |
7 | | * |
8 | | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | | * |
10 | | * Unless required by applicable law or agreed to in writing, software |
11 | | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | | * See the License for the specific language governing permissions and |
14 | | * limitations under the License. |
15 | | */ |
16 | | |
17 | | #ifdef WIN32 |
18 | | /* POSIX defines 1024 for the FD_SETSIZE */ |
19 | | #define FD_SETSIZE 1024 |
20 | | #endif |
21 | | |
22 | | #include "apr.h" |
23 | | #include "apr_poll.h" |
24 | | #include "apr_time.h" |
25 | | #include "apr_portable.h" |
26 | | #include "apr_arch_file_io.h" |
27 | | #include "apr_arch_networkio.h" |
28 | | #include "apr_arch_poll_private.h" |
29 | | |
30 | | #ifdef POLL_USES_SELECT |
31 | | |
32 | | APR_DECLARE(apr_status_t) apr_poll(apr_pollfd_t *aprset, int num, |
33 | | apr_int32_t *nsds, |
34 | | apr_interval_time_t timeout) |
35 | | { |
36 | | fd_set readset, writeset, exceptset; |
37 | | int rv, i; |
38 | | int maxfd = -1; |
39 | | struct timeval tv, *tvptr; |
40 | | #ifdef NETWARE |
41 | | apr_datatype_e set_type = APR_NO_DESC; |
42 | | #endif |
43 | | |
44 | | #ifdef WIN32 |
45 | | /* On Win32, select() must be presented with at least one socket to |
46 | | * poll on, or select() will return WSAEINVAL. So, we'll just |
47 | | * short-circuit and bail now. |
48 | | */ |
49 | | if (num == 0) { |
50 | | (*nsds) = 0; |
51 | | if (timeout > 0) { |
52 | | apr_sleep(timeout); |
53 | | return APR_TIMEUP; |
54 | | } |
55 | | return APR_SUCCESS; |
56 | | } |
57 | | #endif |
58 | | |
59 | | if (timeout < 0) { |
60 | | tvptr = NULL; |
61 | | } |
62 | | else { |
63 | | tv.tv_sec = (long) apr_time_sec(timeout); |
64 | | tv.tv_usec = (long) apr_time_usec(timeout); |
65 | | tvptr = &tv; |
66 | | } |
67 | | |
68 | | FD_ZERO(&readset); |
69 | | FD_ZERO(&writeset); |
70 | | FD_ZERO(&exceptset); |
71 | | |
72 | | for (i = 0; i < num; i++) { |
73 | | apr_os_sock_t fd; |
74 | | |
75 | | aprset[i].rtnevents = 0; |
76 | | |
77 | | if (aprset[i].desc_type == APR_POLL_SOCKET) { |
78 | | #ifdef NETWARE |
79 | | if (HAS_PIPES(set_type)) { |
80 | | return APR_EBADF; |
81 | | } |
82 | | else { |
83 | | set_type = APR_POLL_SOCKET; |
84 | | } |
85 | | #endif |
86 | | fd = aprset[i].desc.s->socketdes; |
87 | | } |
88 | | else if (aprset[i].desc_type == APR_POLL_FILE) { |
89 | | #if !APR_FILES_AS_SOCKETS |
90 | | return APR_EBADF; |
91 | | #else |
92 | | #ifdef NETWARE |
93 | | if (aprset[i].desc.f->is_pipe && !HAS_SOCKETS(set_type)) { |
94 | | set_type = APR_POLL_FILE; |
95 | | } |
96 | | else |
97 | | return APR_EBADF; |
98 | | #endif /* NETWARE */ |
99 | | |
100 | | fd = aprset[i].desc.f->filedes; |
101 | | |
102 | | #endif /* APR_FILES_AS_SOCKETS */ |
103 | | } |
104 | | else { |
105 | | break; |
106 | | } |
107 | | #if !defined(WIN32) && !defined(NETWARE) /* socket sets handled with array of handles */ |
108 | | if (fd >= FD_SETSIZE) { |
109 | | /* XXX invent new error code so application has a clue */ |
110 | | return APR_EBADF; |
111 | | } |
112 | | #endif |
113 | | if (aprset[i].reqevents & APR_POLLIN) { |
114 | | FD_SET(fd, &readset); |
115 | | } |
116 | | if (aprset[i].reqevents & APR_POLLOUT) { |
117 | | FD_SET(fd, &writeset); |
118 | | } |
119 | | if (aprset[i].reqevents & |
120 | | (APR_POLLPRI | APR_POLLERR | APR_POLLHUP | APR_POLLNVAL)) { |
121 | | FD_SET(fd, &exceptset); |
122 | | } |
123 | | if ((int) fd > maxfd) { |
124 | | maxfd = (int) fd; |
125 | | } |
126 | | } |
127 | | |
128 | | #ifdef NETWARE |
129 | | if (HAS_PIPES(set_type)) { |
130 | | rv = pipe_select(maxfd + 1, &readset, &writeset, &exceptset, tvptr); |
131 | | } |
132 | | else { |
133 | | #endif |
134 | | |
135 | | rv = select(maxfd + 1, &readset, &writeset, &exceptset, tvptr); |
136 | | |
137 | | #ifdef NETWARE |
138 | | } |
139 | | #endif |
140 | | |
141 | | (*nsds) = rv; |
142 | | if ((*nsds) == 0) { |
143 | | return APR_TIMEUP; |
144 | | } |
145 | | if ((*nsds) < 0) { |
146 | | return apr_get_netos_error(); |
147 | | } |
148 | | |
149 | | (*nsds) = 0; |
150 | | for (i = 0; i < num; i++) { |
151 | | apr_os_sock_t fd; |
152 | | |
153 | | if (aprset[i].desc_type == APR_POLL_SOCKET) { |
154 | | fd = aprset[i].desc.s->socketdes; |
155 | | } |
156 | | else if (aprset[i].desc_type == APR_POLL_FILE) { |
157 | | #if !APR_FILES_AS_SOCKETS |
158 | | return APR_EBADF; |
159 | | #else |
160 | | fd = aprset[i].desc.f->filedes; |
161 | | #endif |
162 | | } |
163 | | else { |
164 | | break; |
165 | | } |
166 | | if (FD_ISSET(fd, &readset)) { |
167 | | aprset[i].rtnevents |= APR_POLLIN; |
168 | | } |
169 | | if (FD_ISSET(fd, &writeset)) { |
170 | | aprset[i].rtnevents |= APR_POLLOUT; |
171 | | } |
172 | | if (FD_ISSET(fd, &exceptset)) { |
173 | | aprset[i].rtnevents |= APR_POLLERR; |
174 | | } |
175 | | if (aprset[i].rtnevents) { |
176 | | (*nsds)++; |
177 | | } |
178 | | } |
179 | | |
180 | | return APR_SUCCESS; |
181 | | } |
182 | | |
183 | | #endif /* POLL_USES_SELECT */ |
184 | | |
185 | | struct apr_pollset_private_t |
186 | | { |
187 | | fd_set readset, writeset, exceptset; |
188 | | int maxfd; |
189 | | apr_pollfd_t *query_set; |
190 | | apr_pollfd_t *result_set; |
191 | | #ifdef NETWARE |
192 | | int set_type; |
193 | | #endif |
194 | | }; |
195 | | |
196 | | static apr_status_t impl_pollset_create(apr_pollset_t *pollset, |
197 | | apr_uint32_t size, |
198 | | apr_pool_t *p, |
199 | | apr_uint32_t flags) |
200 | 0 | { |
201 | 0 | if (flags & APR_POLLSET_THREADSAFE) { |
202 | 0 | pollset->p = NULL; |
203 | 0 | return APR_ENOTIMPL; |
204 | 0 | } |
205 | 0 | #ifdef FD_SETSIZE |
206 | 0 | if (size > FD_SETSIZE) { |
207 | 0 | pollset->p = NULL; |
208 | 0 | return APR_EINVAL; |
209 | 0 | } |
210 | 0 | #endif |
211 | 0 | pollset->p = apr_palloc(p, sizeof(apr_pollset_private_t)); |
212 | 0 | FD_ZERO(&(pollset->p->readset)); |
213 | 0 | FD_ZERO(&(pollset->p->writeset)); |
214 | 0 | FD_ZERO(&(pollset->p->exceptset)); |
215 | 0 | pollset->p->maxfd = 0; |
216 | | #ifdef NETWARE |
217 | | pollset->p->set_type = APR_NO_DESC; |
218 | | #endif |
219 | 0 | pollset->p->query_set = apr_palloc(p, size * sizeof(apr_pollfd_t)); |
220 | 0 | pollset->p->result_set = apr_palloc(p, size * sizeof(apr_pollfd_t)); |
221 | |
|
222 | 0 | return APR_SUCCESS; |
223 | 0 | } |
224 | | |
225 | | static apr_status_t impl_pollset_add(apr_pollset_t *pollset, |
226 | | const apr_pollfd_t *descriptor) |
227 | 0 | { |
228 | 0 | apr_os_sock_t fd; |
229 | |
|
230 | 0 | if (pollset->nelts == pollset->nalloc) { |
231 | 0 | return APR_ENOMEM; |
232 | 0 | } |
233 | | |
234 | 0 | pollset->p->query_set[pollset->nelts] = *descriptor; |
235 | |
|
236 | 0 | if (descriptor->desc_type == APR_POLL_SOCKET) { |
237 | | #ifdef NETWARE |
238 | | /* NetWare can't handle mixed descriptor types in select() */ |
239 | | if (HAS_PIPES(pollset->p->set_type)) { |
240 | | return APR_EBADF; |
241 | | } |
242 | | else { |
243 | | pollset->p->set_type = APR_POLL_SOCKET; |
244 | | } |
245 | | #endif |
246 | 0 | fd = descriptor->desc.s->socketdes; |
247 | 0 | } |
248 | 0 | else { |
249 | | #if !APR_FILES_AS_SOCKETS |
250 | | return APR_EBADF; |
251 | | #else |
252 | | #ifdef NETWARE |
253 | | /* NetWare can't handle mixed descriptor types in select() */ |
254 | | if (descriptor->desc.f->is_pipe && !HAS_SOCKETS(pollset->p->set_type)) { |
255 | | pollset->p->set_type = APR_POLL_FILE; |
256 | | fd = descriptor->desc.f->filedes; |
257 | | } |
258 | | else { |
259 | | return APR_EBADF; |
260 | | } |
261 | | #else |
262 | 0 | fd = descriptor->desc.f->filedes; |
263 | 0 | #endif |
264 | 0 | #endif |
265 | 0 | } |
266 | 0 | #if !defined(WIN32) && !defined(NETWARE) /* socket sets handled with array of handles */ |
267 | 0 | if (fd >= FD_SETSIZE) { |
268 | | /* XXX invent new error code so application has a clue */ |
269 | 0 | return APR_EBADF; |
270 | 0 | } |
271 | 0 | #endif |
272 | 0 | if (descriptor->reqevents & APR_POLLIN) { |
273 | 0 | FD_SET(fd, &(pollset->p->readset)); |
274 | 0 | } |
275 | 0 | if (descriptor->reqevents & APR_POLLOUT) { |
276 | 0 | FD_SET(fd, &(pollset->p->writeset)); |
277 | 0 | } |
278 | 0 | if (descriptor->reqevents & |
279 | 0 | (APR_POLLPRI | APR_POLLERR | APR_POLLHUP | APR_POLLNVAL)) { |
280 | 0 | FD_SET(fd, &(pollset->p->exceptset)); |
281 | 0 | } |
282 | 0 | if ((int) fd > pollset->p->maxfd) { |
283 | 0 | pollset->p->maxfd = (int) fd; |
284 | 0 | } |
285 | 0 | pollset->nelts++; |
286 | 0 | return APR_SUCCESS; |
287 | 0 | } |
288 | | |
289 | | static apr_status_t impl_pollset_remove(apr_pollset_t * pollset, |
290 | | const apr_pollfd_t * descriptor) |
291 | 0 | { |
292 | 0 | apr_uint32_t i; |
293 | 0 | apr_os_sock_t fd; |
294 | |
|
295 | 0 | if (descriptor->desc_type == APR_POLL_SOCKET) { |
296 | 0 | fd = descriptor->desc.s->socketdes; |
297 | 0 | } |
298 | 0 | else { |
299 | | #if !APR_FILES_AS_SOCKETS |
300 | | return APR_EBADF; |
301 | | #else |
302 | 0 | fd = descriptor->desc.f->filedes; |
303 | 0 | #endif |
304 | 0 | } |
305 | |
|
306 | 0 | for (i = 0; i < pollset->nelts; i++) { |
307 | 0 | if (descriptor->desc.s == pollset->p->query_set[i].desc.s) { |
308 | | /* Found an instance of the fd: remove this and any other copies */ |
309 | 0 | apr_uint32_t dst = i; |
310 | 0 | apr_uint32_t old_nelts = pollset->nelts; |
311 | 0 | pollset->nelts--; |
312 | 0 | for (i++; i < old_nelts; i++) { |
313 | 0 | if (descriptor->desc.s == pollset->p->query_set[i].desc.s) { |
314 | 0 | pollset->nelts--; |
315 | 0 | } |
316 | 0 | else { |
317 | 0 | pollset->p->query_set[dst] = pollset->p->query_set[i]; |
318 | 0 | dst++; |
319 | 0 | } |
320 | 0 | } |
321 | 0 | FD_CLR(fd, &(pollset->p->readset)); |
322 | 0 | FD_CLR(fd, &(pollset->p->writeset)); |
323 | 0 | FD_CLR(fd, &(pollset->p->exceptset)); |
324 | 0 | if (((int) fd == pollset->p->maxfd) && (pollset->p->maxfd > 0)) { |
325 | 0 | pollset->p->maxfd--; |
326 | 0 | } |
327 | 0 | return APR_SUCCESS; |
328 | 0 | } |
329 | 0 | } |
330 | | |
331 | 0 | return APR_NOTFOUND; |
332 | 0 | } |
333 | | |
334 | | static apr_status_t impl_pollset_poll(apr_pollset_t *pollset, |
335 | | apr_interval_time_t timeout, |
336 | | apr_int32_t *num, |
337 | | const apr_pollfd_t **descriptors) |
338 | 0 | { |
339 | 0 | int rs; |
340 | 0 | apr_uint32_t i, j; |
341 | 0 | struct timeval tv, *tvptr; |
342 | 0 | fd_set readset, writeset, exceptset; |
343 | 0 | apr_status_t rv = APR_SUCCESS; |
344 | |
|
345 | 0 | *num = 0; |
346 | |
|
347 | | #ifdef WIN32 |
348 | | /* On Win32, select() must be presented with at least one socket to |
349 | | * poll on, or select() will return WSAEINVAL. So, we'll just |
350 | | * short-circuit and bail now. |
351 | | */ |
352 | | if (pollset->nelts == 0) { |
353 | | if (timeout > 0) { |
354 | | apr_sleep(timeout); |
355 | | return APR_TIMEUP; |
356 | | } |
357 | | return APR_SUCCESS; |
358 | | } |
359 | | #endif |
360 | |
|
361 | 0 | if (timeout < 0) { |
362 | 0 | tvptr = NULL; |
363 | 0 | } |
364 | 0 | else { |
365 | 0 | tv.tv_sec = (long) apr_time_sec(timeout); |
366 | 0 | tv.tv_usec = (long) apr_time_usec(timeout); |
367 | 0 | tvptr = &tv; |
368 | 0 | } |
369 | |
|
370 | 0 | memcpy(&readset, &(pollset->p->readset), sizeof(fd_set)); |
371 | 0 | memcpy(&writeset, &(pollset->p->writeset), sizeof(fd_set)); |
372 | 0 | memcpy(&exceptset, &(pollset->p->exceptset), sizeof(fd_set)); |
373 | |
|
374 | | #ifdef NETWARE |
375 | | if (HAS_PIPES(pollset->p->set_type)) { |
376 | | rs = pipe_select(pollset->p->maxfd + 1, &readset, &writeset, &exceptset, |
377 | | tvptr); |
378 | | } |
379 | | else |
380 | | #endif |
381 | 0 | rs = select(pollset->p->maxfd + 1, &readset, &writeset, &exceptset, |
382 | 0 | tvptr); |
383 | |
|
384 | 0 | if (rs < 0) { |
385 | 0 | return apr_get_netos_error(); |
386 | 0 | } |
387 | 0 | if (rs == 0) { |
388 | 0 | return APR_TIMEUP; |
389 | 0 | } |
390 | 0 | j = 0; |
391 | 0 | for (i = 0; i < pollset->nelts; i++) { |
392 | 0 | apr_os_sock_t fd; |
393 | |
|
394 | 0 | if (pollset->flags & APR_POLLSET_WAKEABLE) { |
395 | 0 | #if WAKEUP_USES_PIPE |
396 | 0 | if (pollset->p->query_set[i].desc_type == APR_POLL_FILE && |
397 | 0 | pollset->p->query_set[i].desc.f == pollset->wakeup_pipe[0]) { |
398 | 0 | apr_poll_drain_wakeup_pipe(&pollset->wakeup_set, pollset->wakeup_pipe); |
399 | 0 | rv = APR_EINTR; |
400 | 0 | continue; |
401 | 0 | } |
402 | | #else |
403 | | if (pollset->p->query_set[i].desc_type == APR_POLL_SOCKET && |
404 | | pollset->p->query_set[i].desc.s == pollset->wakeup_socket[0]) { |
405 | | apr_poll_drain_wakeup_socket(&pollset->wakeup_set, pollset->wakeup_socket); |
406 | | rv = APR_EINTR; |
407 | | continue; |
408 | | } |
409 | | #endif |
410 | 0 | } |
411 | | |
412 | 0 | if (pollset->p->query_set[i].desc_type == APR_POLL_SOCKET) { |
413 | 0 | fd = pollset->p->query_set[i].desc.s->socketdes; |
414 | 0 | } |
415 | 0 | else { |
416 | | #if !APR_FILES_AS_SOCKETS |
417 | | return APR_EBADF; |
418 | | #else |
419 | 0 | fd = pollset->p->query_set[i].desc.f->filedes; |
420 | 0 | #endif |
421 | 0 | } |
422 | 0 | if (FD_ISSET(fd, &readset) || FD_ISSET(fd, &writeset) || |
423 | 0 | FD_ISSET(fd, &exceptset)) { |
424 | 0 | pollset->p->result_set[j] = pollset->p->query_set[i]; |
425 | 0 | pollset->p->result_set[j].rtnevents = 0; |
426 | 0 | if (FD_ISSET(fd, &readset)) { |
427 | 0 | pollset->p->result_set[j].rtnevents |= APR_POLLIN; |
428 | 0 | } |
429 | 0 | if (FD_ISSET(fd, &writeset)) { |
430 | 0 | pollset->p->result_set[j].rtnevents |= APR_POLLOUT; |
431 | 0 | } |
432 | 0 | if (FD_ISSET(fd, &exceptset)) { |
433 | 0 | pollset->p->result_set[j].rtnevents |= APR_POLLERR; |
434 | 0 | } |
435 | 0 | j++; |
436 | 0 | } |
437 | 0 | } |
438 | 0 | if (((*num) = j) != 0) |
439 | 0 | rv = APR_SUCCESS; |
440 | |
|
441 | 0 | if (descriptors) |
442 | 0 | *descriptors = pollset->p->result_set; |
443 | 0 | return rv; |
444 | 0 | } |
445 | | |
446 | | static const apr_pollset_provider_t impl = { |
447 | | impl_pollset_create, |
448 | | impl_pollset_add, |
449 | | impl_pollset_remove, |
450 | | impl_pollset_poll, |
451 | | NULL, |
452 | | "select" |
453 | | }; |
454 | | |
455 | | const apr_pollset_provider_t *apr_pollset_provider_select = &impl; |