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1 | /* ioset.h - srvx event loop | |
2 | * Copyright 2002-2004, 2006 srvx Development Team | |
3 | * | |
4 | * This file is part of srvx. | |
5 | * | |
6 | * srvx is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with srvx; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
19 | */ | |
20 | ||
21 | #include "ioset-impl.h" | |
22 | #include "log.h" | |
23 | #include "timeq.h" | |
24 | #include "saxdb.h" | |
25 | #include "conf.h" | |
26 | ||
27 | #ifdef HAVE_FCNTL_H | |
28 | #include <fcntl.h> | |
29 | #endif | |
30 | #ifdef HAVE_SYS_SOCKET_H | |
31 | #include <sys/socket.h> | |
32 | #endif | |
33 | ||
34 | #ifdef WITH_IOSET_WIN32 | |
35 | ||
36 | # undef errno | |
37 | # define errno WSAGetLastError() | |
38 | # undef EINPROGRESS | |
39 | # define EINPROGRESS WSAEINPROGRESS | |
40 | # undef EHOSTUNREACH | |
41 | # define EHOSTUNREACH WSAEHOSTUNREACH | |
42 | # undef ECONNREFUSED | |
43 | # define ECONNREFUSED WSAECONNREFUSED | |
44 | # undef EAGAIN | |
45 | # define EAGAIN WSAEWOULDBLOCK | |
46 | # define strerror wsa_strerror | |
47 | ||
48 | static const char * | |
49 | wsa_strerror(int wsa_err) | |
50 | { | |
51 | switch (wsa_err) | |
52 | { | |
53 | case WSAEINTR: return "Operation interrupted"; | |
54 | case WSAEBADF: return "Bad file descriptor"; | |
55 | case WSAEACCES: return "Permission denied"; | |
56 | case WSAEFAULT: return "Invalid address"; | |
57 | case WSAEINVAL: return "Invalid parameter"; | |
58 | case WSAEMFILE: return "Too many open files"; | |
59 | case WSAEWOULDBLOCK: return "Try again later"; | |
60 | case WSAEINPROGRESS: return "Operation in progress"; | |
61 | case WSAEALREADY: return "Operation already in progress"; | |
62 | case WSAENOTSOCK: return "Not a socket"; | |
63 | case WSAEDESTADDRREQ: return "Destination address required"; | |
64 | case WSAEMSGSIZE: return "Invalid message size"; | |
65 | case WSAEPROTOTYPE: return "Invalid protocol type for socket"; | |
66 | case WSAENOPROTOOPT: return "Invalid protocol option"; | |
67 | case WSAEPROTONOSUPPORT: return "Protocol not supported"; | |
68 | case WSAEOPNOTSUPP: return "Operation not supported"; | |
69 | case WSAEADDRINUSE: return "Address already in use"; | |
70 | case WSAEADDRNOTAVAIL: return "Address not available"; | |
71 | case WSAENETDOWN: return "Network down"; | |
72 | case WSAENETUNREACH: return "Network unreachable"; | |
73 | case WSAENETRESET: return "Network reset"; | |
74 | case WSAECONNABORTED: return "Connection aborted"; | |
75 | case WSAECONNRESET: return "Connection reset by peer"; | |
76 | case WSAECONNREFUSED: return "Connection refused"; | |
77 | } | |
78 | return "unknown error"; | |
79 | } | |
80 | ||
81 | #endif /* WITH_IOSET_WIN32 */ | |
82 | ||
83 | #define IS_EOL(CH) ((CH) == '\n') | |
84 | ||
85 | extern int uplink_connect(void); | |
86 | int clock_skew; | |
87 | int do_write_dbs; | |
88 | int do_reopen; | |
89 | static struct io_engine *engine; | |
90 | static struct io_fd *active_fd; | |
91 | ||
92 | static void | |
93 | ioq_init(struct ioq *ioq, int size) { | |
94 | ioq->buf = malloc(size); | |
95 | ioq->get = ioq->put = 0; | |
96 | ioq->size = size; | |
97 | } | |
98 | ||
99 | static unsigned int | |
100 | ioq_put_avail(const struct ioq *ioq) { | |
101 | /* Subtract 1 from ioq->get to be sure we don't fill the buffer | |
102 | * and make it look empty even when there's data in it. */ | |
103 | if (ioq->put < ioq->get) | |
104 | return ioq->get - ioq->put - 1; | |
105 | else if (ioq->get == 0) | |
106 | return ioq->size - ioq->put - 1; | |
107 | else | |
108 | return ioq->size - ioq->put; | |
109 | } | |
110 | ||
111 | static unsigned int | |
112 | ioq_get_avail(const struct ioq *ioq) { | |
113 | return ((ioq->put < ioq->get) ? ioq->size : ioq->put) - ioq->get; | |
114 | } | |
115 | ||
116 | static unsigned int | |
117 | ioq_used(const struct ioq *ioq) { | |
118 | return ((ioq->put < ioq->get) ? ioq->size : 0) + ioq->put - ioq->get; | |
119 | } | |
120 | ||
121 | static unsigned int | |
122 | ioq_grow(struct ioq *ioq) { | |
123 | int new_size = ioq->size << 1; | |
124 | char *new_buf = malloc(new_size); | |
125 | int get_avail = ioq_get_avail(ioq); | |
126 | memcpy(new_buf, ioq->buf + ioq->get, get_avail); | |
127 | if (ioq->put < ioq->get) | |
128 | memcpy(new_buf + get_avail, ioq->buf, ioq->put); | |
129 | free(ioq->buf); | |
130 | ioq->put = ioq_used(ioq); | |
131 | ioq->get = 0; | |
132 | ioq->buf = new_buf; | |
133 | ioq->size = new_size; | |
134 | return new_size - ioq->put; | |
135 | } | |
136 | ||
137 | extern struct io_engine io_engine_kevent; | |
138 | extern struct io_engine io_engine_epoll; | |
139 | extern struct io_engine io_engine_win32; | |
140 | extern struct io_engine io_engine_select; | |
141 | ||
142 | void | |
143 | ioset_init(void) | |
144 | { | |
145 | if (engine) /* someone beat us to it */ | |
146 | return; | |
147 | ||
148 | #if WITH_IOSET_KEVENT | |
149 | if (!engine && io_engine_kevent.init()) | |
150 | engine = &io_engine_kevent; | |
151 | #endif | |
152 | ||
153 | #if WITH_IOSET_EPOLL | |
154 | if (!engine && io_engine_epoll.init()) | |
155 | engine = &io_engine_epoll; | |
156 | #endif | |
157 | ||
158 | #if WITH_IOSET_WIN32 | |
159 | if (!engine && io_engine_win32.init()) | |
160 | engine = &io_engine_win32; | |
161 | #endif | |
162 | ||
163 | if (engine) { | |
164 | /* we found one that works */ | |
165 | } else if (io_engine_select.init()) | |
166 | engine = &io_engine_select; | |
167 | else | |
168 | log_module(MAIN_LOG, LOG_FATAL, "No usable I/O engine found."); | |
169 | log_module(MAIN_LOG, LOG_DEBUG, "Using %s I/O engine.", engine->name); | |
170 | } | |
171 | ||
172 | void | |
173 | ioset_cleanup(void) { | |
174 | engine->cleanup(); | |
175 | } | |
176 | ||
177 | struct io_fd * | |
178 | ioset_add(int fd) { | |
179 | struct io_fd *res; | |
180 | int flags; | |
181 | ||
182 | if (fd < 0) { | |
183 | log_module(MAIN_LOG, LOG_ERROR, "Somebody called ioset_add(%d) on a negative fd!", fd); | |
184 | return 0; | |
185 | } | |
186 | if (!engine) | |
187 | ioset_init(); | |
188 | res = calloc(1, sizeof(*res)); | |
189 | if (!res) | |
190 | return 0; | |
191 | res->fd = fd; | |
192 | ioq_init(&res->send, 1024); | |
193 | ioq_init(&res->recv, 1024); | |
194 | #if defined(F_GETFL) | |
195 | flags = fcntl(fd, F_GETFL); | |
196 | fcntl(fd, F_SETFL, flags|O_NONBLOCK); | |
197 | flags = fcntl(fd, F_GETFD); | |
198 | fcntl(fd, F_SETFD, flags|FD_CLOEXEC); | |
199 | #else | |
200 | /* I hope you're using the Win32 backend or something else that | |
201 | * automatically marks the file descriptor non-blocking... | |
202 | */ | |
203 | (void)flags; | |
204 | #endif | |
205 | engine->add(res); | |
206 | return res; | |
207 | } | |
208 | ||
209 | struct io_fd *ioset_listen(struct sockaddr *local, unsigned int sa_size, void *data, void (*accept_cb)(struct io_fd *listener, struct io_fd *new_connect)) | |
210 | { | |
211 | struct io_fd *io_fd; | |
212 | unsigned int opt; | |
213 | int res; | |
214 | int fd; | |
215 | ||
216 | fd = socket(local ? local->sa_family : PF_INET, SOCK_STREAM, 0); | |
217 | if (fd < 0) { | |
218 | log_module(MAIN_LOG, LOG_ERROR, "Unable to create listening socket: %s", strerror(errno)); | |
219 | return NULL; | |
220 | } | |
221 | ||
222 | if (local && sa_size) { | |
223 | opt = 1; | |
224 | res = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&opt, sizeof(opt)); | |
225 | if (res < 0) { | |
226 | log_module(MAIN_LOG, LOG_WARNING, "Unable to mark listener address as re-usable: %s", strerror(errno)); | |
227 | } | |
228 | res = bind(fd, local, sa_size); | |
229 | if (res < 0) { | |
230 | log_module(MAIN_LOG, LOG_ERROR, "Unable to bind listening socket %d: %s", fd, strerror(errno)); | |
231 | close(fd); | |
232 | return NULL; | |
233 | } | |
234 | } | |
235 | ||
236 | res = listen(fd, 1); | |
237 | if (res < 0) { | |
238 | log_module(MAIN_LOG, LOG_ERROR, "Unable to listen on socket %d: %s", fd, strerror(errno)); | |
239 | close(fd); | |
240 | return NULL; | |
241 | } | |
242 | ||
243 | io_fd = ioset_add(fd); | |
244 | if (!io_fd) { | |
245 | close(fd); | |
246 | return NULL; | |
247 | } | |
248 | io_fd->state = IO_LISTENING; | |
249 | io_fd->data = data; | |
250 | io_fd->accept_cb = accept_cb; | |
251 | engine->update(io_fd); | |
252 | return io_fd; | |
253 | } | |
254 | ||
255 | struct io_fd * | |
256 | ioset_connect(struct sockaddr *local, unsigned int sa_size, const char *peer, unsigned int port, int blocking, void *data, void (*connect_cb)(struct io_fd *fd, int error)) { | |
257 | struct addrinfo hints; | |
258 | struct addrinfo *ai; | |
259 | struct io_fd *io_fd; | |
260 | struct io_fd *old_active; | |
261 | int res; | |
262 | int fd; | |
263 | char portnum[10]; | |
264 | ||
265 | memset(&hints, 0, sizeof(hints)); | |
266 | hints.ai_family = local ? local->sa_family : 0; | |
267 | hints.ai_socktype = SOCK_STREAM; | |
268 | snprintf(portnum, sizeof(portnum), "%u", port); | |
269 | res = getaddrinfo(peer, portnum, &hints, &ai); | |
270 | if (res != 0) { | |
271 | log_module(MAIN_LOG, LOG_ERROR, "getaddrinfo(%s, %s) failed: %s.", peer, portnum, gai_strerror(res)); | |
272 | return NULL; | |
273 | } | |
274 | ||
275 | if (local) { | |
276 | if ((fd = socket(local->sa_family, SOCK_STREAM, 0)) < 0) { | |
277 | log_module(MAIN_LOG, LOG_ERROR, "socket() for %s returned errno %d (%s)", peer, errno, strerror(errno)); | |
278 | freeaddrinfo(ai); | |
279 | return NULL; | |
280 | } | |
281 | if (bind(fd, local, sa_size) < 0) { | |
282 | log_module(MAIN_LOG, LOG_ERROR, "bind() of socket for %s (fd %d) returned errno %d (%s). Will let operating system choose.", peer, fd, errno, strerror(errno)); | |
283 | } | |
284 | } else { | |
285 | if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) { | |
286 | log_module(MAIN_LOG, LOG_ERROR, "socket() for %s returned errno %d (%s).", peer, errno, strerror(errno)); | |
287 | freeaddrinfo(ai); | |
288 | return NULL; | |
289 | } | |
290 | } | |
291 | ||
292 | if (blocking) { | |
293 | res = connect(fd, ai->ai_addr, ai->ai_addrlen); | |
294 | io_fd = ioset_add(fd); | |
295 | } else { | |
296 | io_fd = ioset_add(fd); | |
297 | res = connect(fd, ai->ai_addr, ai->ai_addrlen); | |
298 | } | |
299 | freeaddrinfo(ai); | |
300 | if (!io_fd) { | |
301 | close(fd); | |
302 | return NULL; | |
303 | } | |
304 | io_fd->state = IO_CONNECTING; | |
305 | io_fd->data = data; | |
306 | io_fd->connect_cb = connect_cb; | |
307 | if (res < 0) { | |
308 | switch (errno) { | |
309 | case EINPROGRESS: /* only if !blocking */ | |
310 | engine->update(io_fd); | |
311 | return io_fd; | |
312 | default: | |
313 | log_module(MAIN_LOG, LOG_ERROR, "connect(%s:%d) (fd %d) returned errno %d (%s).", peer, port, io_fd->fd, errno, strerror(errno)); | |
314 | /* then fall through */ | |
315 | case EHOSTUNREACH: | |
316 | case ECONNREFUSED: | |
317 | ioset_close(io_fd, 1); | |
318 | return NULL; | |
319 | } | |
320 | } | |
321 | io_fd->state = IO_CONNECTED; | |
322 | old_active = active_fd; | |
323 | if (connect_cb) | |
324 | connect_cb(io_fd, ((res < 0) ? errno : 0)); | |
325 | if (active_fd) | |
326 | engine->update(io_fd); | |
327 | if (old_active != io_fd) | |
328 | active_fd = old_active; | |
329 | return io_fd; | |
330 | } | |
331 | ||
332 | void ioset_update(struct io_fd *fd) { | |
333 | engine->update(fd); | |
334 | } | |
335 | ||
336 | static void | |
337 | ioset_try_write(struct io_fd *fd) { | |
338 | int res; | |
339 | unsigned int req; | |
340 | ||
341 | req = ioq_get_avail(&fd->send); | |
342 | res = send(fd->fd, fd->send.buf+fd->send.get, req, 0); | |
343 | if (res < 0) { | |
344 | if (errno != EAGAIN) { | |
345 | log_module(MAIN_LOG, LOG_ERROR, "send() on fd %d error %d: %s", fd->fd, errno, strerror(errno)); | |
346 | } | |
347 | } else { | |
348 | fd->send.get += res; | |
349 | if (fd->send.get == fd->send.size) | |
350 | fd->send.get = 0; | |
351 | engine->update(fd); | |
352 | } | |
353 | } | |
354 | ||
355 | void | |
356 | ioset_close(struct io_fd *fdp, int os_close) { | |
357 | if (!fdp) | |
358 | return; | |
359 | if (active_fd == fdp) | |
360 | active_fd = NULL; | |
361 | if (fdp->destroy_cb) | |
362 | fdp->destroy_cb(fdp); | |
363 | #if defined(HAVE_WSAEVENTSELECT) | |
364 | /* This is one huge kludge. Sorry! */ | |
365 | if (fdp->send.get != fdp->send.put && (os_close & 2)) { | |
366 | engine->remove(fdp, 0); | |
367 | ioset_try_write(fdp); | |
368 | /* it may need to send the beginning of the buffer now.. */ | |
369 | if (fdp->send.get != fdp->send.put) | |
370 | ioset_try_write(fdp); | |
371 | } | |
372 | free(fdp->send.buf); | |
373 | free(fdp->recv.buf); | |
374 | if (os_close & 1) | |
375 | closesocket(fdp->fd); | |
376 | #else | |
377 | if (fdp->send.get != fdp->send.put && (os_close & 2)) { | |
378 | int flags; | |
379 | ||
380 | flags = fcntl(fdp->fd, F_GETFL); | |
381 | fcntl(fdp->fd, F_SETFL, flags&~O_NONBLOCK); | |
382 | ioset_try_write(fdp); | |
383 | /* it may need to send the beginning of the buffer now.. */ | |
384 | if (fdp->send.get != fdp->send.put) | |
385 | ioset_try_write(fdp); | |
386 | } | |
387 | free(fdp->send.buf); | |
388 | free(fdp->recv.buf); | |
389 | if (os_close & 1) | |
390 | close(fdp->fd); | |
391 | engine->remove(fdp, os_close & 1); | |
392 | #endif | |
393 | free(fdp); | |
394 | } | |
395 | ||
396 | static void | |
397 | ioset_accept(struct io_fd *listener) | |
398 | { | |
399 | struct io_fd *old_active; | |
400 | struct io_fd *new_fd; | |
401 | int fd; | |
402 | ||
403 | fd = accept(listener->fd, NULL, 0); | |
404 | if (fd < 0) { | |
405 | log_module(MAIN_LOG, LOG_ERROR, "Unable to accept new connection on listener %d: %s", listener->fd, strerror(errno)); | |
406 | return; | |
407 | } | |
408 | ||
409 | new_fd = ioset_add(fd); | |
410 | new_fd->state = IO_CONNECTED; | |
411 | old_active = active_fd; | |
412 | active_fd = new_fd; | |
413 | listener->accept_cb(listener, new_fd); | |
414 | assert(active_fd == NULL || active_fd == new_fd); | |
415 | if (active_fd == new_fd) { | |
416 | if (new_fd->send.get != new_fd->send.put) | |
417 | ioset_try_write(new_fd); | |
418 | else | |
419 | engine->update(new_fd); | |
420 | } | |
421 | active_fd = old_active; | |
422 | } | |
423 | ||
424 | static int | |
425 | ioset_find_line_length(struct io_fd *fd) { | |
426 | unsigned int pos, max, len; | |
427 | len = 0; | |
428 | max = (fd->recv.put < fd->recv.get) ? fd->recv.size : fd->recv.put; | |
429 | for (pos = fd->recv.get; pos < max; ++pos, ++len) | |
430 | if (IS_EOL(fd->recv.buf[pos])) | |
431 | return fd->line_len = len + 1; | |
432 | if (fd->recv.put < fd->recv.get) | |
433 | for (pos = 0; pos < fd->recv.put; ++pos, ++len) | |
434 | if (IS_EOL(fd->recv.buf[pos])) | |
435 | return fd->line_len = len + 1; | |
436 | return fd->line_len = 0; | |
437 | } | |
438 | ||
439 | static void | |
440 | ioset_buffered_read(struct io_fd *fd) { | |
441 | int put_avail, nbr; | |
442 | ||
443 | if (!(put_avail = ioq_put_avail(&fd->recv))) | |
444 | put_avail = ioq_grow(&fd->recv); | |
445 | nbr = recv(fd->fd, fd->recv.buf + fd->recv.put, put_avail, 0); | |
446 | if (nbr < 0) { | |
447 | if (errno != EAGAIN) { | |
448 | log_module(MAIN_LOG, LOG_ERROR, "Unexpected recv() error %d on fd %d: %s", errno, fd->fd, strerror(errno)); | |
449 | /* Just flag it as EOF and call readable_cb() to notify the fd's owner. */ | |
450 | fd->state = IO_CLOSED; | |
451 | fd->readable_cb(fd); | |
452 | if (active_fd == fd) | |
453 | engine->update(fd); | |
454 | } | |
455 | } else if (nbr == 0) { | |
456 | fd->state = IO_CLOSED; | |
457 | fd->readable_cb(fd); | |
458 | if (active_fd == fd) | |
459 | engine->update(fd); | |
460 | } else { | |
461 | if (fd->line_len == 0) { | |
462 | unsigned int pos; | |
463 | for (pos = fd->recv.put; pos < fd->recv.put + nbr; ++pos) { | |
464 | if (IS_EOL(fd->recv.buf[pos])) { | |
465 | if (fd->recv.put < fd->recv.get) | |
466 | fd->line_len = fd->recv.size + pos + 1 - fd->recv.get; | |
467 | else | |
468 | fd->line_len = pos + 1 - fd->recv.get; | |
469 | break; | |
470 | } | |
471 | } | |
472 | } | |
473 | fd->recv.put += nbr; | |
474 | if (fd->recv.put == fd->recv.size) | |
475 | fd->recv.put = 0; | |
476 | while (fd->line_len > 0) { | |
477 | struct io_fd *old_active; | |
478 | int died = 0; | |
479 | ||
480 | old_active = active_fd; | |
481 | active_fd = fd; | |
482 | fd->readable_cb(fd); | |
483 | if (active_fd) | |
484 | ioset_find_line_length(fd); | |
485 | else | |
486 | died = 1; | |
487 | if (old_active != fd) | |
488 | active_fd = old_active; | |
489 | if (died) | |
490 | break; | |
491 | } | |
492 | } | |
493 | } | |
494 | ||
495 | int | |
496 | ioset_line_read(struct io_fd *fd, char *dest, int max) { | |
497 | int line_len; | |
498 | int avail; | |
499 | int done; | |
500 | ||
501 | line_len = fd->line_len; | |
502 | if ((fd->state == IO_CLOSED) && (!ioq_get_avail(&fd->recv) || (line_len < 0))) | |
503 | return 0; | |
504 | if (line_len < 0) | |
505 | return -1; | |
506 | if (line_len < max) | |
507 | max = line_len; | |
508 | avail = ioq_get_avail(&fd->recv); | |
509 | if (max > avail) { | |
510 | memcpy(dest, fd->recv.buf + fd->recv.get, avail); | |
511 | assert(fd->recv.get + avail == fd->recv.size); | |
512 | fd->recv.get = 0; | |
513 | done = avail; | |
514 | } else { | |
515 | done = 0; | |
516 | } | |
517 | memcpy(dest + done, fd->recv.buf + fd->recv.get, max - done); | |
518 | fd->recv.get += max - done; | |
519 | if (fd->recv.get == fd->recv.size) | |
520 | fd->recv.get = 0; | |
521 | dest[max - 1] = 0; | |
522 | ioset_find_line_length(fd); | |
523 | return line_len; | |
524 | } | |
525 | ||
526 | void | |
527 | ioset_events(struct io_fd *fd, int readable, int writable) | |
528 | { | |
529 | if (!fd || (!readable && !writable)) | |
530 | return; | |
531 | active_fd = fd; | |
532 | switch (fd->state) { | |
533 | case IO_CLOSED: | |
534 | break; | |
535 | case IO_LISTENING: | |
536 | if (active_fd && readable) | |
537 | ioset_accept(fd); | |
538 | break; | |
539 | case IO_CONNECTING: | |
540 | assert(active_fd == NULL || active_fd == fd); | |
541 | if (active_fd && readable) { | |
542 | socklen_t arglen; | |
543 | int rc; | |
544 | arglen = sizeof(rc); | |
545 | if (getsockopt(fd->fd, SOL_SOCKET, SO_ERROR, &rc, &arglen) < 0) | |
546 | rc = errno; | |
547 | fd->state = IO_CLOSED; | |
548 | if (fd->connect_cb) | |
549 | fd->connect_cb(fd, rc); | |
550 | } else if (active_fd && writable) { | |
551 | fd->state = IO_CONNECTED; | |
552 | if (fd->connect_cb) | |
553 | fd->connect_cb(fd, 0); | |
554 | } | |
555 | if (active_fd != fd) | |
556 | break; | |
557 | engine->update(fd); | |
558 | /* and fall through */ | |
559 | case IO_CONNECTED: | |
560 | assert(active_fd == NULL || active_fd == fd); | |
561 | if (active_fd && readable) { | |
562 | if (fd->line_reads) | |
563 | ioset_buffered_read(fd); | |
564 | else | |
565 | fd->readable_cb(fd); | |
566 | } | |
567 | ||
568 | assert(active_fd == NULL || active_fd == fd); | |
569 | if (active_fd && writable) | |
570 | ioset_try_write(fd); | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
575 | void | |
576 | ioset_run(void) { | |
577 | extern struct io_fd *socket_io_fd; | |
578 | struct timeval timeout; | |
579 | time_t wakey; | |
580 | ||
581 | while (!quit_services) { | |
582 | while (!socket_io_fd) | |
583 | uplink_connect(); | |
584 | ||
585 | /* How long to sleep? (fill in select_timeout) */ | |
586 | wakey = timeq_next(); | |
587 | if (wakey < now) | |
588 | timeout.tv_sec = 0; | |
589 | else | |
590 | timeout.tv_sec = wakey - now; | |
591 | timeout.tv_usec = 0; | |
592 | ||
593 | if (engine->loop(&timeout)) | |
594 | continue; | |
595 | ||
596 | /* Call any timeq events we need to call. */ | |
597 | timeq_run(); | |
598 | if (do_write_dbs) { | |
599 | saxdb_write_all(NULL); | |
600 | do_write_dbs = 0; | |
601 | } | |
602 | if (do_reopen) { | |
603 | extern char *services_config; | |
604 | conf_read(services_config); | |
605 | do_reopen = 0; | |
606 | } | |
607 | } | |
608 | } | |
609 | ||
610 | void | |
611 | ioset_write(struct io_fd *fd, const char *buf, unsigned int nbw) { | |
612 | unsigned int avail; | |
613 | while (ioq_used(&fd->send) + nbw >= fd->send.size) | |
614 | ioq_grow(&fd->send); | |
615 | avail = ioq_put_avail(&fd->send); | |
616 | if (nbw > avail) { | |
617 | memcpy(fd->send.buf + fd->send.put, buf, avail); | |
618 | buf += avail; | |
619 | nbw -= avail; | |
620 | fd->send.put = 0; | |
621 | } | |
622 | memcpy(fd->send.buf + fd->send.put, buf, nbw); | |
623 | fd->send.put += nbw; | |
624 | if (fd->send.put == fd->send.size) | |
625 | fd->send.put = 0; | |
626 | engine->update(fd); | |
627 | } | |
628 | ||
629 | int | |
630 | ioset_printf(struct io_fd *fd, const char *fmt, ...) { | |
631 | char tmpbuf[MAXLEN]; | |
632 | va_list ap; | |
633 | int res; | |
634 | ||
635 | va_start(ap, fmt); | |
636 | res = vsnprintf(tmpbuf, sizeof(tmpbuf), fmt, ap); | |
637 | va_end(ap); | |
638 | if (res > 0 && (size_t)res <= sizeof(tmpbuf)) | |
639 | ioset_write(fd, tmpbuf, res); | |
640 | return res; | |
641 | } | |
642 | ||
643 | void | |
644 | ioset_set_time(unsigned long new_now) { | |
645 | clock_skew = new_now - time(NULL); | |
646 | now = new_now; | |
647 | } |