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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * commio.c: Network/file related functions | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 | |
22 | * USA | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <librb_config.h> | |
27 | #include <rb_lib.h> | |
28 | #include <commio-int.h> | |
29 | #include <commio-ssl.h> | |
30 | #include <event-int.h> | |
31 | #ifdef HAVE_SYS_UIO_H | |
32 | #include <sys/uio.h> | |
33 | #endif | |
34 | #define HAVE_SSL 1 | |
35 | ||
36 | #ifndef MSG_NOSIGNAL | |
37 | #define MSG_NOSIGNAL 0 | |
38 | #endif | |
39 | ||
40 | ||
41 | struct timeout_data | |
42 | { | |
43 | rb_fde_t *F; | |
44 | rb_dlink_node node; | |
45 | time_t timeout; | |
46 | PF *timeout_handler; | |
47 | void *timeout_data; | |
48 | }; | |
49 | ||
50 | rb_dlink_list *rb_fd_table; | |
51 | static rb_bh *fd_heap; | |
52 | ||
53 | static rb_dlink_list timeout_list; | |
54 | static rb_dlink_list closed_list; | |
55 | ||
56 | static struct ev_entry *rb_timeout_ev; | |
57 | ||
58 | ||
59 | static const char *rb_err_str[] = { "Comm OK", "Error during bind()", | |
60 | "Error during DNS lookup", "connect timeout", | |
61 | "Error during connect()", | |
62 | "Comm Error", | |
63 | "Error with SSL" | |
64 | }; | |
65 | ||
66 | /* Highest FD and number of open FDs .. */ | |
67 | static int number_fd = 0; | |
68 | int rb_maxconnections = 0; | |
69 | ||
70 | static PF rb_connect_timeout; | |
71 | static PF rb_connect_tryconnect; | |
72 | #ifdef RB_IPV6 | |
73 | static void mangle_mapped_sockaddr(struct sockaddr *in); | |
74 | #endif | |
75 | ||
76 | #ifndef HAVE_SOCKETPAIR | |
77 | static int rb_inet_socketpair(int d, int type, int protocol, rb_platform_fd_t sv[2]); | |
78 | static int rb_inet_socketpair_udp(rb_fde_t **newF1, rb_fde_t **newF2); | |
79 | #endif | |
80 | ||
81 | static inline rb_fde_t * | |
82 | add_fd(rb_platform_fd_t fd) | |
83 | { | |
84 | rb_fde_t *F = rb_find_fd(fd); | |
85 | ||
86 | /* look up to see if we have it already */ | |
87 | if(F != NULL) | |
88 | return F; | |
89 | ||
90 | F = rb_bh_alloc(fd_heap); | |
91 | F->fd = fd; | |
92 | rb_dlinkAdd(F, &F->node, &rb_fd_table[rb_hash_fd(fd)]); | |
93 | return (F); | |
94 | } | |
95 | ||
96 | static inline void | |
97 | remove_fd(rb_fde_t *F) | |
98 | { | |
99 | if(F == NULL || !IsFDOpen(F)) | |
100 | return; | |
101 | ||
102 | rb_dlinkMoveNode(&F->node, &rb_fd_table[rb_hash_fd(F->fd)], &closed_list); | |
103 | } | |
104 | ||
105 | static void | |
106 | free_fds(void) | |
107 | { | |
108 | rb_fde_t *F; | |
109 | rb_dlink_node *ptr, *next; | |
110 | RB_DLINK_FOREACH_SAFE(ptr, next, closed_list.head) | |
111 | { | |
112 | F = ptr->data; | |
113 | rb_dlinkDelete(ptr, &closed_list); | |
114 | rb_bh_free(fd_heap, F); | |
115 | } | |
116 | } | |
117 | ||
118 | /* 32bit solaris is kinda slow and stdio only supports fds < 256 | |
119 | * so we got to do this crap below. | |
120 | * (BTW Fuck you Sun, I hate your guts and I hope you go bankrupt soon) | |
121 | */ | |
122 | ||
123 | #if defined (__SVR4) && defined (__sun) | |
124 | static void | |
125 | rb_fd_hack(int *fd) | |
126 | { | |
127 | int newfd; | |
128 | if(*fd > 256 || *fd < 0) | |
129 | return; | |
130 | if((newfd = fcntl(*fd, F_DUPFD, 256)) != -1) | |
131 | { | |
132 | close(*fd); | |
133 | *fd = newfd; | |
134 | } | |
135 | return; | |
136 | } | |
137 | #else | |
138 | #define rb_fd_hack(fd) | |
139 | #endif | |
140 | ||
141 | ||
142 | /* close_all_connections() can be used *before* the system come up! */ | |
143 | ||
144 | static void | |
145 | rb_close_all(void) | |
146 | { | |
147 | #ifndef _WIN32 | |
148 | int i; | |
149 | ||
150 | /* XXX someone tell me why we care about 4 fd's ? */ | |
151 | /* XXX btw, fd 3 is used for profiler ! */ | |
152 | for(i = 3; i < rb_maxconnections; ++i) | |
153 | { | |
154 | close(i); | |
155 | } | |
156 | #endif | |
157 | } | |
158 | ||
159 | /* | |
160 | * get_sockerr - get the error value from the socket or the current errno | |
161 | * | |
162 | * Get the *real* error from the socket (well try to anyway..). | |
163 | * This may only work when SO_DEBUG is enabled but its worth the | |
164 | * gamble anyway. | |
165 | */ | |
166 | int | |
167 | rb_get_sockerr(rb_fde_t *F) | |
168 | { | |
169 | int errtmp; | |
170 | int err = 0; | |
171 | rb_socklen_t len = sizeof(err); | |
172 | ||
173 | if(!(F->type & RB_FD_SOCKET)) | |
174 | return errno; | |
175 | ||
176 | rb_get_errno(); | |
177 | errtmp = errno; | |
178 | ||
179 | #ifdef SO_ERROR | |
180 | if(F != NULL | |
181 | && !getsockopt(rb_get_fd(F), SOL_SOCKET, SO_ERROR, (char *)&err, (rb_socklen_t *) & len)) | |
182 | { | |
183 | if(err) | |
184 | errtmp = err; | |
185 | } | |
186 | errno = errtmp; | |
187 | #endif | |
188 | return errtmp; | |
189 | } | |
190 | ||
191 | /* | |
192 | * rb_getmaxconnect - return the max number of connections allowed | |
193 | */ | |
194 | int | |
195 | rb_getmaxconnect(void) | |
196 | { | |
197 | return (rb_maxconnections); | |
198 | } | |
199 | ||
200 | /* | |
201 | * set_sock_buffers - set send and receive buffers for socket | |
202 | * | |
203 | * inputs - fd file descriptor | |
204 | * - size to set | |
205 | * output - returns true (1) if successful, false (0) otherwise | |
206 | * side effects - | |
207 | */ | |
208 | int | |
209 | rb_set_buffers(rb_fde_t *F, int size) | |
210 | { | |
211 | if(F == NULL) | |
212 | return 0; | |
213 | if(setsockopt | |
214 | (F->fd, SOL_SOCKET, SO_RCVBUF, (char *)&size, sizeof(size)) | |
215 | || setsockopt(F->fd, SOL_SOCKET, SO_SNDBUF, (char *)&size, sizeof(size))) | |
216 | return 0; | |
217 | return 1; | |
218 | } | |
219 | ||
220 | /* | |
221 | * set_non_blocking - Set the client connection into non-blocking mode. | |
222 | * | |
223 | * inputs - fd to set into non blocking mode | |
224 | * output - 1 if successful 0 if not | |
225 | * side effects - use POSIX compliant non blocking and | |
226 | * be done with it. | |
227 | */ | |
228 | int | |
229 | rb_set_nb(rb_fde_t *F) | |
230 | { | |
231 | int nonb = 0; | |
232 | int res; | |
233 | rb_platform_fd_t fd; | |
234 | if(F == NULL) | |
235 | return 0; | |
236 | fd = F->fd; | |
237 | ||
238 | if((res = rb_setup_fd(F))) | |
239 | return res; | |
240 | #ifdef O_NONBLOCK | |
241 | nonb |= O_NONBLOCK; | |
242 | res = fcntl(fd, F_GETFL, 0); | |
243 | if(-1 == res || fcntl(fd, F_SETFL, res | nonb) == -1) | |
244 | return 0; | |
245 | #else | |
246 | nonb = 1; | |
247 | res = 0; | |
248 | if(ioctl(fd, FIONBIO, (char *)&nonb) == -1) | |
249 | return 0; | |
250 | #endif | |
251 | ||
252 | return 1; | |
253 | } | |
254 | ||
255 | /* | |
256 | * rb_settimeout() - set the socket timeout | |
257 | * | |
258 | * Set the timeout for the fd | |
259 | */ | |
260 | void | |
261 | rb_settimeout(rb_fde_t *F, time_t timeout, PF * callback, void *cbdata) | |
262 | { | |
263 | struct timeout_data *td; | |
264 | ||
265 | if(F == NULL) | |
266 | return; | |
267 | ||
268 | lrb_assert(IsFDOpen(F)); | |
269 | td = F->timeout; | |
270 | if(callback == NULL) /* user wants to remove */ | |
271 | { | |
272 | if(td == NULL) | |
273 | return; | |
274 | rb_dlinkDelete(&td->node, &timeout_list); | |
275 | rb_free(td); | |
276 | F->timeout = NULL; | |
277 | if(rb_dlink_list_length(&timeout_list) == 0) | |
278 | { | |
279 | rb_event_delete(rb_timeout_ev); | |
280 | rb_timeout_ev = NULL; | |
281 | } | |
282 | return; | |
283 | } | |
284 | ||
285 | if(F->timeout == NULL) | |
286 | td = F->timeout = rb_malloc(sizeof(struct timeout_data)); | |
287 | ||
288 | td->F = F; | |
289 | td->timeout = rb_current_time() + timeout; | |
290 | td->timeout_handler = callback; | |
291 | td->timeout_data = cbdata; | |
292 | rb_dlinkAdd(td, &td->node, &timeout_list); | |
293 | if(rb_timeout_ev == NULL) | |
294 | { | |
295 | rb_timeout_ev = rb_event_add("rb_checktimeouts", rb_checktimeouts, NULL, 5); | |
296 | } | |
297 | } | |
298 | ||
299 | /* | |
300 | * rb_checktimeouts() - check the socket timeouts | |
301 | * | |
302 | * All this routine does is call the given callback/cbdata, without closing | |
303 | * down the file descriptor. When close handlers have been implemented, | |
304 | * this will happen. | |
305 | */ | |
306 | void | |
307 | rb_checktimeouts(void *notused) | |
308 | { | |
309 | rb_dlink_node *ptr, *next; | |
310 | struct timeout_data *td; | |
311 | rb_fde_t *F; | |
312 | PF *hdl; | |
313 | void *data; | |
314 | ||
315 | RB_DLINK_FOREACH_SAFE(ptr, next, timeout_list.head) | |
316 | { | |
317 | td = ptr->data; | |
318 | F = td->F; | |
319 | if(F == NULL || !IsFDOpen(F)) | |
320 | continue; | |
321 | ||
322 | if(td->timeout < rb_current_time()) | |
323 | { | |
324 | hdl = td->timeout_handler; | |
325 | data = td->timeout_data; | |
326 | rb_dlinkDelete(&td->node, &timeout_list); | |
327 | F->timeout = NULL; | |
328 | rb_free(td); | |
329 | hdl(F, data); | |
330 | } | |
331 | } | |
332 | } | |
333 | ||
334 | static void | |
335 | rb_accept_tryaccept(rb_fde_t *F, void *data) | |
336 | { | |
337 | struct rb_sockaddr_storage st; | |
338 | rb_fde_t *new_F; | |
339 | rb_socklen_t addrlen = sizeof(st); | |
340 | int new_fd; | |
341 | ||
342 | while(1) | |
343 | { | |
344 | new_fd = accept(F->fd, (struct sockaddr *)&st, &addrlen); | |
345 | rb_get_errno(); | |
346 | if(new_fd < 0) | |
347 | { | |
348 | rb_setselect(F, RB_SELECT_ACCEPT, rb_accept_tryaccept, NULL); | |
349 | return; | |
350 | } | |
351 | ||
352 | rb_fd_hack(&new_fd); | |
353 | ||
354 | new_F = rb_open(new_fd, RB_FD_SOCKET, "Incoming Connection"); | |
355 | ||
356 | if(new_F == NULL) | |
357 | { | |
358 | rb_lib_log | |
359 | ("rb_accept: new_F == NULL on incoming connection. Closing new_fd == %d\n", | |
360 | new_fd); | |
361 | close(new_fd); | |
362 | continue; | |
363 | } | |
364 | ||
365 | if(rb_unlikely(!rb_set_nb(new_F))) | |
366 | { | |
367 | rb_get_errno(); | |
368 | rb_lib_log("rb_accept: Couldn't set FD %d non blocking!", new_F->fd); | |
369 | rb_close(new_F); | |
370 | } | |
371 | ||
372 | #ifdef RB_IPV6 | |
373 | mangle_mapped_sockaddr((struct sockaddr *)&st); | |
374 | #endif | |
375 | ||
376 | if(F->accept->precb != NULL) | |
377 | { | |
378 | if(!F->accept->precb(new_F, (struct sockaddr *)&st, addrlen, F->accept->data)) /* pre-callback decided to drop it */ | |
379 | continue; | |
380 | } | |
381 | #ifdef HAVE_SSL | |
382 | if(F->type & RB_FD_SSL) | |
383 | { | |
384 | rb_ssl_accept_setup(F, new_F, (struct sockaddr *)&st, addrlen); | |
385 | } | |
386 | else | |
387 | #endif /* HAVE_SSL */ | |
388 | { | |
389 | F->accept->callback(new_F, RB_OK, (struct sockaddr *)&st, addrlen, | |
390 | F->accept->data); | |
391 | } | |
392 | } | |
393 | ||
394 | } | |
395 | ||
396 | /* try to accept a TCP connection */ | |
397 | void | |
398 | rb_accept_tcp(rb_fde_t *F, ACPRE * precb, ACCB * callback, void *data) | |
399 | { | |
400 | if(F == NULL) | |
401 | return; | |
402 | lrb_assert(callback); | |
403 | ||
404 | F->accept = rb_malloc(sizeof(struct acceptdata)); | |
405 | F->accept->callback = callback; | |
406 | F->accept->data = data; | |
407 | F->accept->precb = precb; | |
408 | rb_accept_tryaccept(F, NULL); | |
409 | } | |
410 | ||
411 | /* | |
412 | * void rb_connect_tcp(rb_platform_fd_t fd, struct sockaddr *dest, | |
413 | * struct sockaddr *clocal, int socklen, | |
414 | * CNCB *callback, void *data, int timeout) | |
415 | * Input: An fd to connect with, a host and port to connect to, | |
416 | * a local sockaddr to connect from + length(or NULL to use the | |
417 | * default), a callback, the data to pass into the callback, the | |
418 | * address family. | |
419 | * Output: None. | |
420 | * Side-effects: A non-blocking connection to the host is started, and | |
421 | * if necessary, set up for selection. The callback given | |
422 | * may be called now, or it may be called later. | |
423 | */ | |
424 | void | |
425 | rb_connect_tcp(rb_fde_t *F, struct sockaddr *dest, | |
426 | struct sockaddr *clocal, int socklen, CNCB * callback, void *data, int timeout) | |
427 | { | |
428 | if(F == NULL) | |
429 | return; | |
430 | ||
431 | lrb_assert(callback); | |
432 | F->connect = rb_malloc(sizeof(struct conndata)); | |
433 | F->connect->callback = callback; | |
434 | F->connect->data = data; | |
435 | ||
436 | memcpy(&F->connect->hostaddr, dest, sizeof(F->connect->hostaddr)); | |
437 | ||
438 | /* Note that we're using a passed sockaddr here. This is because | |
439 | * generally you'll be bind()ing to a sockaddr grabbed from | |
440 | * getsockname(), so this makes things easier. | |
441 | * XXX If NULL is passed as local, we should later on bind() to the | |
442 | * virtual host IP, for completeness. | |
443 | * -- adrian | |
444 | */ | |
445 | if((clocal != NULL) && (bind(F->fd, clocal, socklen) < 0)) | |
446 | { | |
447 | /* Failure, call the callback with RB_ERR_BIND */ | |
448 | rb_connect_callback(F, RB_ERR_BIND); | |
449 | /* ... and quit */ | |
450 | return; | |
451 | } | |
452 | ||
453 | /* We have a valid IP, so we just call tryconnect */ | |
454 | /* Make sure we actually set the timeout here .. */ | |
455 | rb_settimeout(F, timeout, rb_connect_timeout, NULL); | |
456 | rb_connect_tryconnect(F, NULL); | |
457 | } | |
458 | ||
459 | ||
460 | /* | |
461 | * rb_connect_callback() - call the callback, and continue with life | |
462 | */ | |
463 | void | |
464 | rb_connect_callback(rb_fde_t *F, int status) | |
465 | { | |
466 | CNCB *hdl; | |
467 | void *data; | |
468 | int errtmp = errno; /* save errno as rb_settimeout clobbers it sometimes */ | |
469 | ||
470 | /* This check is gross..but probably necessary */ | |
471 | if(F == NULL || F->connect == NULL || F->connect->callback == NULL) | |
472 | return; | |
473 | /* Clear the connect flag + handler */ | |
474 | hdl = F->connect->callback; | |
475 | data = F->connect->data; | |
476 | F->connect->callback = NULL; | |
477 | ||
478 | ||
479 | /* Clear the timeout handler */ | |
480 | rb_settimeout(F, 0, NULL, NULL); | |
481 | errno = errtmp; | |
482 | /* Call the handler */ | |
483 | hdl(F, status, data); | |
484 | } | |
485 | ||
486 | ||
487 | /* | |
488 | * rb_connect_timeout() - this gets called when the socket connection | |
489 | * times out. This *only* can be called once connect() is initially | |
490 | * called .. | |
491 | */ | |
492 | static void | |
493 | rb_connect_timeout(rb_fde_t *F, void *notused) | |
494 | { | |
495 | /* error! */ | |
496 | rb_connect_callback(F, RB_ERR_TIMEOUT); | |
497 | } | |
498 | ||
499 | /* static void rb_connect_tryconnect(rb_platform_fd_t fd, void *notused) | |
500 | * Input: The fd, the handler data(unused). | |
501 | * Output: None. | |
502 | * Side-effects: Try and connect with pending connect data for the FD. If | |
503 | * we succeed or get a fatal error, call the callback. | |
504 | * Otherwise, it is still blocking or something, so register | |
505 | * to select for a write event on this FD. | |
506 | */ | |
507 | static void | |
508 | rb_connect_tryconnect(rb_fde_t *F, void *notused) | |
509 | { | |
510 | int retval; | |
511 | ||
512 | if(F == NULL || F->connect == NULL || F->connect->callback == NULL) | |
513 | return; | |
514 | /* Try the connect() */ | |
515 | retval = connect(F->fd, | |
516 | (struct sockaddr *)&F->connect->hostaddr, | |
517 | GET_SS_LEN(&F->connect->hostaddr)); | |
518 | /* Error? */ | |
519 | if(retval < 0) | |
520 | { | |
521 | /* | |
522 | * If we get EISCONN, then we've already connect()ed the socket, | |
523 | * which is a good thing. | |
524 | * -- adrian | |
525 | */ | |
526 | rb_get_errno(); | |
527 | if(errno == EISCONN) | |
528 | rb_connect_callback(F, RB_OK); | |
529 | else if(rb_ignore_errno(errno)) | |
530 | /* Ignore error? Reschedule */ | |
531 | rb_setselect(F, RB_SELECT_CONNECT, rb_connect_tryconnect, NULL); | |
532 | else | |
533 | /* Error? Fail with RB_ERR_CONNECT */ | |
534 | rb_connect_callback(F, RB_ERR_CONNECT); | |
535 | return; | |
536 | } | |
537 | /* If we get here, we've suceeded, so call with RB_OK */ | |
538 | rb_connect_callback(F, RB_OK); | |
539 | } | |
540 | ||
541 | ||
542 | int | |
543 | rb_connect_sockaddr(rb_fde_t *F, struct sockaddr *addr, int len) | |
544 | { | |
545 | if(F == NULL) | |
546 | return 0; | |
547 | ||
548 | memcpy(addr, &F->connect->hostaddr, len); | |
549 | return 1; | |
550 | } | |
551 | ||
552 | /* | |
553 | * rb_error_str() - return an error string for the given error condition | |
554 | */ | |
555 | const char * | |
556 | rb_errstr(int error) | |
557 | { | |
558 | if(error < 0 || error >= RB_ERR_MAX) | |
559 | return "Invalid error number!"; | |
560 | return rb_err_str[error]; | |
561 | } | |
562 | ||
563 | ||
564 | int | |
565 | rb_socketpair(int family, int sock_type, int proto, rb_fde_t **F1, rb_fde_t **F2, const char *note) | |
566 | { | |
567 | rb_platform_fd_t nfd[2]; | |
568 | if(number_fd >= rb_maxconnections) | |
569 | { | |
570 | errno = ENFILE; | |
571 | return -1; | |
572 | } | |
573 | ||
574 | #ifdef HAVE_SOCKETPAIR | |
575 | if(socketpair(family, sock_type, proto, nfd)) | |
576 | #else | |
577 | if(sock_type == SOCK_DGRAM) | |
578 | { | |
579 | return rb_inet_socketpair_udp(F1, F2); | |
580 | } | |
581 | ||
582 | if(rb_inet_socketpair(AF_INET, sock_type, proto, nfd)) | |
583 | #endif | |
584 | return -1; | |
585 | ||
586 | rb_fd_hack(&nfd[0]); | |
587 | rb_fd_hack(&nfd[1]); | |
588 | ||
589 | *F1 = rb_open(nfd[0], RB_FD_SOCKET, note); | |
590 | *F2 = rb_open(nfd[1], RB_FD_SOCKET, note); | |
591 | ||
592 | if(*F1 == NULL) | |
593 | { | |
594 | if(*F2 != NULL) | |
595 | rb_close(*F2); | |
596 | return -1; | |
597 | } | |
598 | ||
599 | if(*F2 == NULL) | |
600 | { | |
601 | rb_close(*F1); | |
602 | return -1; | |
603 | } | |
604 | ||
605 | /* Set the socket non-blocking, and other wonderful bits */ | |
606 | if(rb_unlikely(!rb_set_nb(*F1))) | |
607 | { | |
608 | rb_lib_log("rb_open: Couldn't set FD %d non blocking: %s", nfd[0], strerror(errno)); | |
609 | rb_close(*F1); | |
610 | rb_close(*F2); | |
611 | return -1; | |
612 | } | |
613 | ||
614 | if(rb_unlikely(!rb_set_nb(*F2))) | |
615 | { | |
616 | rb_lib_log("rb_open: Couldn't set FD %d non blocking: %s", nfd[1], strerror(errno)); | |
617 | rb_close(*F1); | |
618 | rb_close(*F2); | |
619 | return -1; | |
620 | } | |
621 | ||
622 | return 0; | |
623 | } | |
624 | ||
625 | ||
626 | int | |
627 | rb_pipe(rb_fde_t **F1, rb_fde_t **F2, const char *desc) | |
628 | { | |
629 | #ifndef _WIN32 | |
630 | rb_platform_fd_t fd[2]; | |
631 | if(number_fd >= rb_maxconnections) | |
632 | { | |
633 | errno = ENFILE; | |
634 | return -1; | |
635 | } | |
636 | if(pipe(fd) == -1) | |
637 | return -1; | |
638 | rb_fd_hack(&fd[0]); | |
639 | rb_fd_hack(&fd[1]); | |
640 | *F1 = rb_open(fd[0], RB_FD_PIPE, desc); | |
641 | *F2 = rb_open(fd[1], RB_FD_PIPE, desc); | |
642 | ||
643 | if(rb_unlikely(!rb_set_nb(*F1))) | |
644 | { | |
645 | rb_lib_log("rb_open: Couldn't set FD %d non blocking: %s", fd[0], strerror(errno)); | |
646 | rb_close(*F1); | |
647 | rb_close(*F2); | |
648 | return -1; | |
649 | } | |
650 | ||
651 | if(rb_unlikely(!rb_set_nb(*F2))) | |
652 | { | |
653 | rb_lib_log("rb_open: Couldn't set FD %d non blocking: %s", fd[1], strerror(errno)); | |
654 | rb_close(*F1); | |
655 | rb_close(*F2); | |
656 | return -1; | |
657 | } | |
658 | ||
659 | ||
660 | return 0; | |
661 | #else | |
662 | /* Its not a pipe..but its selectable. I'll take dirty hacks | |
663 | * for $500 Alex. | |
664 | */ | |
665 | return rb_socketpair(AF_INET, SOCK_STREAM, 0, F1, F2, desc); | |
666 | #endif | |
667 | } | |
668 | ||
669 | /* | |
670 | * rb_socket() - open a socket | |
671 | * | |
672 | * This is a highly highly cut down version of squid's rb_open() which | |
673 | * for the most part emulates socket(), *EXCEPT* it fails if we're about | |
674 | * to run out of file descriptors. | |
675 | */ | |
676 | rb_fde_t * | |
677 | rb_socket(int family, int sock_type, int proto, const char *note) | |
678 | { | |
679 | rb_fde_t *F; | |
680 | rb_platform_fd_t fd; | |
681 | /* First, make sure we aren't going to run out of file descriptors */ | |
682 | if(rb_unlikely(number_fd >= rb_maxconnections)) | |
683 | { | |
684 | errno = ENFILE; | |
685 | return NULL; | |
686 | } | |
687 | ||
688 | /* | |
689 | * Next, we try to open the socket. We *should* drop the reserved FD | |
690 | * limit if/when we get an error, but we can deal with that later. | |
691 | * XXX !!! -- adrian | |
692 | */ | |
693 | fd = socket(family, sock_type, proto); | |
694 | rb_fd_hack(&fd); | |
695 | if(rb_unlikely(fd < 0)) | |
696 | return NULL; /* errno will be passed through, yay.. */ | |
697 | ||
698 | #if defined(RB_IPV6) && defined(IPV6_V6ONLY) | |
699 | /* | |
700 | * Make sure we can take both IPv4 and IPv6 connections | |
701 | * on an AF_INET6 socket | |
702 | */ | |
703 | if(family == AF_INET6) | |
704 | { | |
705 | int off = 1; | |
706 | if(setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void *) &off, sizeof(off)) == -1) | |
707 | { | |
708 | rb_lib_log("rb_socket: Could not set IPV6_V6ONLY option to 1 on FD %d: %s", | |
709 | fd, strerror(errno)); | |
710 | close(fd); | |
711 | return NULL; | |
712 | } | |
713 | } | |
714 | #endif | |
715 | ||
716 | F = rb_open(fd, RB_FD_SOCKET, note); | |
717 | if(F == NULL) | |
718 | { | |
719 | rb_lib_log("rb_socket: rb_open returns NULL on FD %d: %s, closing fd", fd, | |
720 | strerror(errno)); | |
721 | close(fd); | |
722 | return NULL; | |
723 | } | |
724 | /* Set the socket non-blocking, and other wonderful bits */ | |
725 | if(rb_unlikely(!rb_set_nb(F))) | |
726 | { | |
727 | rb_lib_log("rb_open: Couldn't set FD %d non blocking: %s", fd, strerror(errno)); | |
728 | rb_close(F); | |
729 | return NULL; | |
730 | } | |
731 | ||
732 | return F; | |
733 | } | |
734 | ||
735 | /* | |
736 | * If a sockaddr_storage is AF_INET6 but is a mapped IPv4 | |
737 | * socket manged the sockaddr. | |
738 | */ | |
739 | #ifdef RB_IPV6 | |
740 | static void | |
741 | mangle_mapped_sockaddr(struct sockaddr *in) | |
742 | { | |
743 | struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)in; | |
744 | ||
745 | if(in->sa_family == AF_INET) | |
746 | return; | |
747 | ||
748 | if(in->sa_family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&in6->sin6_addr)) | |
749 | { | |
750 | struct sockaddr_in in4; | |
751 | memset(&in4, 0, sizeof(struct sockaddr_in)); | |
752 | in4.sin_family = AF_INET; | |
753 | in4.sin_port = in6->sin6_port; | |
754 | in4.sin_addr.s_addr = ((uint32_t *)&in6->sin6_addr)[3]; | |
755 | memcpy(in, &in4, sizeof(struct sockaddr_in)); | |
756 | } | |
757 | return; | |
758 | } | |
759 | #endif | |
760 | ||
761 | /* | |
762 | * rb_listen() - listen on a port | |
763 | */ | |
764 | int | |
765 | rb_listen(rb_fde_t *F, int backlog, int defer_accept) | |
766 | { | |
767 | int result; | |
768 | ||
769 | F->type = RB_FD_SOCKET | RB_FD_LISTEN; | |
770 | result = listen(F->fd, backlog); | |
771 | ||
772 | #ifdef TCP_DEFER_ACCEPT | |
773 | if (defer_accept && !result) | |
774 | { | |
775 | (void)setsockopt(F->fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &backlog, sizeof(int)); | |
776 | } | |
777 | #endif | |
778 | #ifdef SO_ACCEPTFILTER | |
779 | if (defer_accept && !result) | |
780 | { | |
781 | struct accept_filter_arg afa; | |
782 | ||
783 | memset(&afa, '\0', sizeof afa); | |
784 | rb_strlcpy(afa.af_name, "dataready", sizeof afa.af_name); | |
785 | (void)setsockopt(F->fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, | |
786 | sizeof afa); | |
787 | } | |
788 | #endif | |
789 | ||
790 | return result; | |
791 | } | |
792 | ||
793 | void | |
794 | rb_fdlist_init(int closeall, int maxfds, size_t heapsize) | |
795 | { | |
796 | static int initialized = 0; | |
797 | #ifdef _WIN32 | |
798 | WSADATA wsaData; | |
799 | int err; | |
800 | int vers = MAKEWORD(2, 0); | |
801 | ||
802 | err = WSAStartup(vers, &wsaData); | |
803 | if(err != 0) | |
804 | { | |
805 | rb_lib_die("WSAStartup failed"); | |
806 | } | |
807 | ||
808 | #endif | |
809 | if(!initialized) | |
810 | { | |
811 | rb_maxconnections = maxfds; | |
812 | if(closeall) | |
813 | rb_close_all(); | |
814 | /* Since we're doing this once .. */ | |
815 | initialized = 1; | |
816 | } | |
817 | fd_heap = rb_bh_create(sizeof(rb_fde_t), heapsize, "librb_fd_heap"); | |
818 | ||
819 | } | |
820 | ||
821 | ||
822 | /* Called to open a given filedescriptor */ | |
823 | rb_fde_t * | |
824 | rb_open(rb_platform_fd_t fd, uint8_t type, const char *desc) | |
825 | { | |
826 | rb_fde_t *F; | |
827 | lrb_assert(fd >= 0); | |
828 | ||
829 | F = add_fd(fd); | |
830 | ||
831 | lrb_assert(!IsFDOpen(F)); | |
832 | if(rb_unlikely(IsFDOpen(F))) | |
833 | { | |
834 | const char *fdesc; | |
835 | if(F != NULL && F->desc != NULL) | |
836 | fdesc = F->desc; | |
837 | else | |
838 | fdesc = "NULL"; | |
839 | rb_lib_log("Trying to rb_open an already open FD: %d desc: %s", fd, fdesc); | |
840 | return NULL; | |
841 | } | |
842 | F->fd = fd; | |
843 | F->type = type; | |
844 | SetFDOpen(F); | |
845 | ||
846 | if(desc != NULL) | |
847 | F->desc = rb_strndup(desc, FD_DESC_SZ); | |
848 | number_fd++; | |
849 | return F; | |
850 | } | |
851 | ||
852 | ||
853 | /* Called to close a given filedescriptor */ | |
854 | void | |
855 | rb_close(rb_fde_t *F) | |
856 | { | |
857 | int type, fd; | |
858 | ||
859 | if(F == NULL) | |
860 | return; | |
861 | ||
862 | fd = F->fd; | |
863 | type = F->type; | |
864 | lrb_assert(IsFDOpen(F)); | |
865 | ||
866 | lrb_assert(!(type & RB_FD_FILE)); | |
867 | if(rb_unlikely(type & RB_FD_FILE)) | |
868 | { | |
869 | lrb_assert(F->read_handler == NULL); | |
870 | lrb_assert(F->write_handler == NULL); | |
871 | } | |
872 | rb_setselect(F, RB_SELECT_WRITE | RB_SELECT_READ, NULL, NULL); | |
873 | rb_settimeout(F, 0, NULL, NULL); | |
874 | rb_free(F->accept); | |
875 | rb_free(F->connect); | |
876 | rb_free(F->desc); | |
877 | #ifdef HAVE_SSL | |
878 | if(type & RB_FD_SSL) | |
879 | { | |
880 | rb_ssl_shutdown(F); | |
881 | } | |
882 | #endif /* HAVE_SSL */ | |
883 | if(IsFDOpen(F)) | |
884 | { | |
885 | remove_fd(F); | |
886 | ClearFDOpen(F); | |
887 | } | |
888 | ||
889 | number_fd--; | |
890 | ||
891 | #ifdef _WIN32 | |
892 | if(type & (RB_FD_SOCKET | RB_FD_PIPE)) | |
893 | { | |
894 | closesocket(fd); | |
895 | return; | |
896 | } | |
897 | else | |
898 | #endif | |
899 | close(fd); | |
900 | } | |
901 | ||
902 | ||
903 | /* | |
904 | * rb_dump_fd() - dump the list of active filedescriptors | |
905 | */ | |
906 | void | |
907 | rb_dump_fd(DUMPCB * cb, void *data) | |
908 | { | |
909 | static const char *empty = ""; | |
910 | rb_dlink_node *ptr; | |
911 | rb_dlink_list *bucket; | |
912 | rb_fde_t *F; | |
913 | unsigned int i; | |
914 | ||
915 | for(i = 0; i < RB_FD_HASH_SIZE; i++) | |
916 | { | |
917 | bucket = &rb_fd_table[i]; | |
918 | ||
919 | if(rb_dlink_list_length(bucket) <= 0) | |
920 | continue; | |
921 | ||
922 | RB_DLINK_FOREACH(ptr, bucket->head) | |
923 | { | |
924 | F = ptr->data; | |
925 | if(F == NULL || !IsFDOpen(F)) | |
926 | continue; | |
927 | ||
928 | cb(F->fd, F->desc ? F->desc : empty, data); | |
929 | } | |
930 | } | |
931 | } | |
932 | ||
933 | /* | |
934 | * rb_note() - set the fd note | |
935 | * | |
936 | * Note: must be careful not to overflow rb_fd_table[fd].desc when | |
937 | * calling. | |
938 | */ | |
939 | void | |
940 | rb_note(rb_fde_t *F, const char *string) | |
941 | { | |
942 | if(F == NULL) | |
943 | return; | |
944 | ||
945 | rb_free(F->desc); | |
946 | F->desc = rb_strndup(string, FD_DESC_SZ); | |
947 | } | |
948 | ||
949 | void | |
950 | rb_set_type(rb_fde_t *F, uint8_t type) | |
951 | { | |
952 | /* if the caller is calling this, lets assume they have a clue */ | |
953 | F->type = type; | |
954 | return; | |
955 | } | |
956 | ||
957 | uint8_t | |
958 | rb_get_type(rb_fde_t *F) | |
959 | { | |
960 | return F->type; | |
961 | } | |
962 | ||
963 | int | |
964 | rb_fd_ssl(rb_fde_t *F) | |
965 | { | |
966 | if(F == NULL) | |
967 | return 0; | |
968 | if(F->type & RB_FD_SSL) | |
969 | return 1; | |
970 | return 0; | |
971 | } | |
972 | ||
973 | rb_platform_fd_t | |
974 | rb_get_fd(rb_fde_t *F) | |
975 | { | |
976 | if(F == NULL) | |
977 | return -1; | |
978 | return (F->fd); | |
979 | } | |
980 | ||
981 | rb_fde_t * | |
982 | rb_get_fde(rb_platform_fd_t fd) | |
983 | { | |
984 | return rb_find_fd(fd); | |
985 | } | |
986 | ||
987 | ssize_t | |
988 | rb_read(rb_fde_t *F, void *buf, int count) | |
989 | { | |
990 | ssize_t ret; | |
991 | if(F == NULL) | |
992 | return 0; | |
993 | ||
994 | /* This needs to be *before* RB_FD_SOCKET otherwise you'll process | |
995 | * an SSL socket as a regular socket | |
996 | */ | |
997 | #ifdef HAVE_SSL | |
998 | if(F->type & RB_FD_SSL) | |
999 | { | |
1000 | return rb_ssl_read(F, buf, count); | |
1001 | } | |
1002 | #endif | |
1003 | if(F->type & RB_FD_SOCKET) | |
1004 | { | |
1005 | ret = recv(F->fd, buf, count, 0); | |
1006 | if(ret < 0) | |
1007 | { | |
1008 | rb_get_errno(); | |
1009 | } | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | ||
1014 | /* default case */ | |
1015 | return read(F->fd, buf, count); | |
1016 | } | |
1017 | ||
1018 | ||
1019 | ssize_t | |
1020 | rb_write(rb_fde_t *F, const void *buf, int count) | |
1021 | { | |
1022 | ssize_t ret; | |
1023 | if(F == NULL) | |
1024 | return 0; | |
1025 | ||
1026 | #ifdef HAVE_SSL | |
1027 | if(F->type & RB_FD_SSL) | |
1028 | { | |
1029 | return rb_ssl_write(F, buf, count); | |
1030 | } | |
1031 | #endif | |
1032 | if(F->type & RB_FD_SOCKET) | |
1033 | { | |
1034 | ret = send(F->fd, buf, count, MSG_NOSIGNAL); | |
1035 | if(ret < 0) | |
1036 | { | |
1037 | rb_get_errno(); | |
1038 | } | |
1039 | return ret; | |
1040 | } | |
1041 | ||
1042 | return write(F->fd, buf, count); | |
1043 | } | |
1044 | ||
1045 | #if defined(HAVE_SSL) || defined(WIN32) || !defined(HAVE_WRITEV) | |
1046 | static ssize_t | |
1047 | rb_fake_writev(rb_fde_t *F, const struct rb_iovec *vp, size_t vpcount) | |
1048 | { | |
1049 | ssize_t count = 0; | |
1050 | ||
1051 | while(vpcount-- > 0) | |
1052 | { | |
1053 | ssize_t written = rb_write(F, vp->iov_base, vp->iov_len); | |
1054 | ||
1055 | if(written <= 0) | |
1056 | { | |
1057 | if(count > 0) | |
1058 | return count; | |
1059 | else | |
1060 | return written; | |
1061 | } | |
1062 | count += written; | |
1063 | vp++; | |
1064 | } | |
1065 | return (count); | |
1066 | } | |
1067 | #endif | |
1068 | ||
1069 | #if defined(WIN32) || !defined(HAVE_WRITEV) | |
1070 | ssize_t | |
1071 | rb_writev(rb_fde_t *F, struct rb_iovec * vecount, int count) | |
1072 | { | |
1073 | return rb_fake_writev(F, vecount, count); | |
1074 | } | |
1075 | ||
1076 | #else | |
1077 | ssize_t | |
1078 | rb_writev(rb_fde_t *F, struct rb_iovec * vector, int count) | |
1079 | { | |
1080 | if(F == NULL) | |
1081 | { | |
1082 | errno = EBADF; | |
1083 | return -1; | |
1084 | } | |
1085 | #ifdef HAVE_SSL | |
1086 | if(F->type & RB_FD_SSL) | |
1087 | { | |
1088 | return rb_fake_writev(F, vector, count); | |
1089 | } | |
1090 | #endif /* HAVE_SSL */ | |
1091 | #ifdef HAVE_SENDMSG | |
1092 | if(F->type & RB_FD_SOCKET) | |
1093 | { | |
1094 | struct msghdr msg; | |
1095 | memset(&msg, 0, sizeof(msg)); | |
1096 | msg.msg_iov = (struct iovec *)vector; | |
1097 | msg.msg_iovlen = count; | |
1098 | return sendmsg(F->fd, &msg, MSG_NOSIGNAL); | |
1099 | } | |
1100 | #endif /* HAVE_SENDMSG */ | |
1101 | return writev(F->fd, (struct iovec *)vector, count); | |
1102 | ||
1103 | } | |
1104 | #endif | |
1105 | ||
1106 | ||
1107 | /* | |
1108 | * From: Thomas Helvey <tomh@inxpress.net> | |
1109 | */ | |
1110 | static const char *IpQuadTab[] = { | |
1111 | "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", | |
1112 | "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", | |
1113 | "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", | |
1114 | "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", | |
1115 | "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", | |
1116 | "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", | |
1117 | "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", | |
1118 | "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", | |
1119 | "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", | |
1120 | "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", | |
1121 | "100", "101", "102", "103", "104", "105", "106", "107", "108", "109", | |
1122 | "110", "111", "112", "113", "114", "115", "116", "117", "118", "119", | |
1123 | "120", "121", "122", "123", "124", "125", "126", "127", "128", "129", | |
1124 | "130", "131", "132", "133", "134", "135", "136", "137", "138", "139", | |
1125 | "140", "141", "142", "143", "144", "145", "146", "147", "148", "149", | |
1126 | "150", "151", "152", "153", "154", "155", "156", "157", "158", "159", | |
1127 | "160", "161", "162", "163", "164", "165", "166", "167", "168", "169", | |
1128 | "170", "171", "172", "173", "174", "175", "176", "177", "178", "179", | |
1129 | "180", "181", "182", "183", "184", "185", "186", "187", "188", "189", | |
1130 | "190", "191", "192", "193", "194", "195", "196", "197", "198", "199", | |
1131 | "200", "201", "202", "203", "204", "205", "206", "207", "208", "209", | |
1132 | "210", "211", "212", "213", "214", "215", "216", "217", "218", "219", | |
1133 | "220", "221", "222", "223", "224", "225", "226", "227", "228", "229", | |
1134 | "230", "231", "232", "233", "234", "235", "236", "237", "238", "239", | |
1135 | "240", "241", "242", "243", "244", "245", "246", "247", "248", "249", | |
1136 | "250", "251", "252", "253", "254", "255" | |
1137 | }; | |
1138 | ||
1139 | /* | |
1140 | * inetntoa - in_addr to string | |
1141 | * changed name to remove collision possibility and | |
1142 | * so behaviour is guaranteed to take a pointer arg. | |
1143 | * -avalon 23/11/92 | |
1144 | * inet_ntoa -- returned the dotted notation of a given | |
1145 | * internet number | |
1146 | * argv 11/90). | |
1147 | * inet_ntoa -- its broken on some Ultrix/Dynix too. -avalon | |
1148 | */ | |
1149 | ||
1150 | static const char * | |
1151 | inetntoa(const char *in) | |
1152 | { | |
1153 | static char buf[16]; | |
1154 | char *bufptr = buf; | |
1155 | const unsigned char *a = (const unsigned char *)in; | |
1156 | const char *n; | |
1157 | ||
1158 | n = IpQuadTab[*a++]; | |
1159 | while(*n) | |
1160 | *bufptr++ = *n++; | |
1161 | *bufptr++ = '.'; | |
1162 | n = IpQuadTab[*a++]; | |
1163 | while(*n) | |
1164 | *bufptr++ = *n++; | |
1165 | *bufptr++ = '.'; | |
1166 | n = IpQuadTab[*a++]; | |
1167 | while(*n) | |
1168 | *bufptr++ = *n++; | |
1169 | *bufptr++ = '.'; | |
1170 | n = IpQuadTab[*a]; | |
1171 | while(*n) | |
1172 | *bufptr++ = *n++; | |
1173 | *bufptr = '\0'; | |
1174 | return buf; | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * WARNING: Don't even consider trying to compile this on a system where | |
1179 | * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. | |
1180 | */ | |
1181 | ||
1182 | static const char *inet_ntop4(const unsigned char *src, char *dst, unsigned int size); | |
1183 | #ifdef RB_IPV6 | |
1184 | static const char *inet_ntop6(const unsigned char *src, char *dst, unsigned int size); | |
1185 | #endif | |
1186 | ||
1187 | /* const char * | |
1188 | * inet_ntop4(src, dst, size) | |
1189 | * format an IPv4 address | |
1190 | * return: | |
1191 | * `dst' (as a const) | |
1192 | * notes: | |
1193 | * (1) uses no statics | |
1194 | * (2) takes a unsigned char* not an in_addr as input | |
1195 | * author: | |
1196 | * Paul Vixie, 1996. | |
1197 | */ | |
1198 | static const char * | |
1199 | inet_ntop4(const unsigned char *src, char *dst, unsigned int size) | |
1200 | { | |
1201 | if(size < 16) | |
1202 | return NULL; | |
1203 | return strcpy(dst, inetntoa((const char *)src)); | |
1204 | } | |
1205 | ||
1206 | /* const char * | |
1207 | * inet_ntop6(src, dst, size) | |
1208 | * convert IPv6 binary address into presentation (printable) format | |
1209 | * author: | |
1210 | * Paul Vixie, 1996. | |
1211 | */ | |
1212 | #ifdef RB_IPV6 | |
1213 | static const char * | |
1214 | inet_ntop6(const unsigned char *src, char *dst, unsigned int size) | |
1215 | { | |
1216 | /* | |
1217 | * Note that int32_t and int16_t need only be "at least" large enough | |
1218 | * to contain a value of the specified size. On some systems, like | |
1219 | * Crays, there is no such thing as an integer variable with 16 bits. | |
1220 | * Keep this in mind if you think this function should have been coded | |
1221 | * to use pointer overlays. All the world's not a VAX. | |
1222 | */ | |
1223 | char tmp[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"], *tp; | |
1224 | struct | |
1225 | { | |
1226 | int base, len; | |
1227 | } | |
1228 | best, cur; | |
1229 | unsigned int words[IN6ADDRSZ / INT16SZ]; | |
1230 | int i; | |
1231 | ||
1232 | /* | |
1233 | * Preprocess: | |
1234 | * Copy the input (bytewise) array into a wordwise array. | |
1235 | * Find the longest run of 0x00's in src[] for :: shorthanding. | |
1236 | */ | |
1237 | memset(words, '\0', sizeof words); | |
1238 | for(i = 0; i < IN6ADDRSZ; i += 2) | |
1239 | words[i / 2] = (src[i] << 8) | src[i + 1]; | |
1240 | best.base = -1; | |
1241 | best.len = 0; | |
1242 | cur.base = -1; | |
1243 | cur.len = 0; | |
1244 | for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++) | |
1245 | { | |
1246 | if(words[i] == 0) | |
1247 | { | |
1248 | if(cur.base == -1) | |
1249 | cur.base = i, cur.len = 1; | |
1250 | else | |
1251 | cur.len++; | |
1252 | } | |
1253 | else | |
1254 | { | |
1255 | if(cur.base != -1) | |
1256 | { | |
1257 | if(best.base == -1 || cur.len > best.len) | |
1258 | best = cur; | |
1259 | cur.base = -1; | |
1260 | } | |
1261 | } | |
1262 | } | |
1263 | if(cur.base != -1) | |
1264 | { | |
1265 | if(best.base == -1 || cur.len > best.len) | |
1266 | best = cur; | |
1267 | } | |
1268 | if(best.base != -1 && best.len < 2) | |
1269 | best.base = -1; | |
1270 | ||
1271 | /* | |
1272 | * Format the result. | |
1273 | */ | |
1274 | tp = tmp; | |
1275 | for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++) | |
1276 | { | |
1277 | /* Are we inside the best run of 0x00's? */ | |
1278 | if(best.base != -1 && i >= best.base && i < (best.base + best.len)) | |
1279 | { | |
1280 | if(i == best.base) | |
1281 | { | |
1282 | if(i == 0) | |
1283 | *tp++ = '0'; | |
1284 | *tp++ = ':'; | |
1285 | } | |
1286 | continue; | |
1287 | } | |
1288 | /* Are we following an initial run of 0x00s or any real hex? */ | |
1289 | if(i != 0) | |
1290 | *tp++ = ':'; | |
1291 | /* Is this address an encapsulated IPv4? */ | |
1292 | if(i == 6 && best.base == 0 && | |
1293 | (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) | |
1294 | { | |
1295 | if(!inet_ntop4(src + 12, tp, sizeof tmp - (tp - tmp))) | |
1296 | return (NULL); | |
1297 | tp += strlen(tp); | |
1298 | break; | |
1299 | } | |
1300 | tp += sprintf(tp, "%x", words[i]); | |
1301 | } | |
1302 | /* Was it a trailing run of 0x00's? */ | |
1303 | if(best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ)) | |
1304 | *tp++ = ':'; | |
1305 | *tp++ = '\0'; | |
1306 | ||
1307 | /* | |
1308 | * Check for overflow, copy, and we're done. | |
1309 | */ | |
1310 | ||
1311 | if((unsigned int)(tp - tmp) > size) | |
1312 | { | |
1313 | return (NULL); | |
1314 | } | |
1315 | return memcpy(dst, tmp, tp - tmp); | |
1316 | } | |
1317 | #endif | |
1318 | ||
1319 | int | |
1320 | rb_inet_pton_sock(const char *src, struct sockaddr *dst) | |
1321 | { | |
1322 | if(rb_inet_pton(AF_INET, src, &((struct sockaddr_in *)dst)->sin_addr)) | |
1323 | { | |
1324 | SET_SS_FAMILY(dst, AF_INET); | |
1325 | SET_SS_LEN(dst, sizeof(struct sockaddr_in)); | |
1326 | return 1; | |
1327 | } | |
1328 | #ifdef RB_IPV6 | |
1329 | else if(rb_inet_pton(AF_INET6, src, &((struct sockaddr_in6 *)dst)->sin6_addr)) | |
1330 | { | |
1331 | SET_SS_FAMILY(dst, AF_INET6); | |
1332 | SET_SS_LEN(dst, sizeof(struct sockaddr_in6)); | |
1333 | return 1; | |
1334 | } | |
1335 | #endif | |
1336 | SET_SS_PORT(dst, 0); | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | const char * | |
1341 | rb_inet_ntop_sock(struct sockaddr *src, char *dst, unsigned int size) | |
1342 | { | |
1343 | switch (src->sa_family) | |
1344 | { | |
1345 | case AF_INET: | |
1346 | return (rb_inet_ntop(AF_INET, &((struct sockaddr_in *)src)->sin_addr, dst, size)); | |
1347 | break; | |
1348 | #ifdef RB_IPV6 | |
1349 | case AF_INET6: | |
1350 | return (rb_inet_ntop | |
1351 | (AF_INET6, &((struct sockaddr_in6 *)src)->sin6_addr, dst, size)); | |
1352 | break; | |
1353 | #endif | |
1354 | default: | |
1355 | return NULL; | |
1356 | break; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | /* char * | |
1361 | * rb_inet_ntop(af, src, dst, size) | |
1362 | * convert a network format address to presentation format. | |
1363 | * return: | |
1364 | * pointer to presentation format address (`dst'), or NULL (see errno). | |
1365 | * author: | |
1366 | * Paul Vixie, 1996. | |
1367 | */ | |
1368 | const char * | |
1369 | rb_inet_ntop(int af, const void *src, char *dst, unsigned int size) | |
1370 | { | |
1371 | switch (af) | |
1372 | { | |
1373 | case AF_INET: | |
1374 | return (inet_ntop4(src, dst, size)); | |
1375 | #ifdef RB_IPV6 | |
1376 | case AF_INET6: | |
1377 | if(IN6_IS_ADDR_V4MAPPED((const struct in6_addr *)src) || | |
1378 | IN6_IS_ADDR_V4COMPAT((const struct in6_addr *)src)) | |
1379 | return (inet_ntop4 | |
1380 | ((const unsigned char *)&((const struct in6_addr *)src)-> | |
1381 | s6_addr[12], dst, size)); | |
1382 | else | |
1383 | return (inet_ntop6(src, dst, size)); | |
1384 | ||
1385 | ||
1386 | #endif | |
1387 | default: | |
1388 | return (NULL); | |
1389 | } | |
1390 | /* NOTREACHED */ | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * WARNING: Don't even consider trying to compile this on a system where | |
1395 | * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX. | |
1396 | */ | |
1397 | ||
1398 | /* int | |
1399 | * rb_inet_pton(af, src, dst) | |
1400 | * convert from presentation format (which usually means ASCII printable) | |
1401 | * to network format (which is usually some kind of binary format). | |
1402 | * return: | |
1403 | * 1 if the address was valid for the specified address family | |
1404 | * 0 if the address wasn't valid (`dst' is untouched in this case) | |
1405 | * -1 if some other error occurred (`dst' is untouched in this case, too) | |
1406 | * author: | |
1407 | * Paul Vixie, 1996. | |
1408 | */ | |
1409 | ||
1410 | /* int | |
1411 | * inet_pton4(src, dst) | |
1412 | * like inet_aton() but without all the hexadecimal and shorthand. | |
1413 | * return: | |
1414 | * 1 if `src' is a valid dotted quad, else 0. | |
1415 | * notice: | |
1416 | * does not touch `dst' unless it's returning 1. | |
1417 | * author: | |
1418 | * Paul Vixie, 1996. | |
1419 | */ | |
1420 | static int | |
1421 | inet_pton4(const char *src, unsigned char *dst) | |
1422 | { | |
1423 | int saw_digit, octets, ch; | |
1424 | unsigned char tmp[INADDRSZ], *tp; | |
1425 | ||
1426 | saw_digit = 0; | |
1427 | octets = 0; | |
1428 | *(tp = tmp) = 0; | |
1429 | while((ch = *src++) != '\0') | |
1430 | { | |
1431 | ||
1432 | if(ch >= '0' && ch <= '9') | |
1433 | { | |
1434 | unsigned int new = *tp * 10 + (ch - '0'); | |
1435 | ||
1436 | if(new > 255) | |
1437 | return (0); | |
1438 | *tp = new; | |
1439 | if(!saw_digit) | |
1440 | { | |
1441 | if(++octets > 4) | |
1442 | return (0); | |
1443 | saw_digit = 1; | |
1444 | } | |
1445 | } | |
1446 | else if(ch == '.' && saw_digit) | |
1447 | { | |
1448 | if(octets == 4) | |
1449 | return (0); | |
1450 | *++tp = 0; | |
1451 | saw_digit = 0; | |
1452 | } | |
1453 | else | |
1454 | return (0); | |
1455 | } | |
1456 | if(octets < 4) | |
1457 | return (0); | |
1458 | memcpy(dst, tmp, INADDRSZ); | |
1459 | return (1); | |
1460 | } | |
1461 | ||
1462 | #ifdef RB_IPV6 | |
1463 | /* int | |
1464 | * inet_pton6(src, dst) | |
1465 | * convert presentation level address to network order binary form. | |
1466 | * return: | |
1467 | * 1 if `src' is a valid [RFC1884 2.2] address, else 0. | |
1468 | * notice: | |
1469 | * (1) does not touch `dst' unless it's returning 1. | |
1470 | * (2) :: in a full address is silently ignored. | |
1471 | * credit: | |
1472 | * inspired by Mark Andrews. | |
1473 | * author: | |
1474 | * Paul Vixie, 1996. | |
1475 | */ | |
1476 | ||
1477 | static int | |
1478 | inet_pton6(const char *src, unsigned char *dst) | |
1479 | { | |
1480 | static const char xdigits[] = "0123456789abcdef"; | |
1481 | unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp; | |
1482 | const char *curtok; | |
1483 | int ch, saw_xdigit; | |
1484 | unsigned int val; | |
1485 | ||
1486 | tp = memset(tmp, '\0', IN6ADDRSZ); | |
1487 | endp = tp + IN6ADDRSZ; | |
1488 | colonp = NULL; | |
1489 | /* Leading :: requires some special handling. */ | |
1490 | if(*src == ':') | |
1491 | if(*++src != ':') | |
1492 | return (0); | |
1493 | curtok = src; | |
1494 | saw_xdigit = 0; | |
1495 | val = 0; | |
1496 | while((ch = tolower((unsigned char)*src++)) != '\0') | |
1497 | { | |
1498 | const char *pch; | |
1499 | ||
1500 | pch = strchr(xdigits, ch); | |
1501 | if(pch != NULL) | |
1502 | { | |
1503 | val <<= 4; | |
1504 | val |= (pch - xdigits); | |
1505 | if(val > 0xffff) | |
1506 | return (0); | |
1507 | saw_xdigit = 1; | |
1508 | continue; | |
1509 | } | |
1510 | if(ch == ':') | |
1511 | { | |
1512 | curtok = src; | |
1513 | if(!saw_xdigit) | |
1514 | { | |
1515 | if(colonp) | |
1516 | return (0); | |
1517 | colonp = tp; | |
1518 | continue; | |
1519 | } | |
1520 | else if(*src == '\0') | |
1521 | { | |
1522 | return (0); | |
1523 | } | |
1524 | if(tp + INT16SZ > endp) | |
1525 | return (0); | |
1526 | *tp++ = (unsigned char)(val >> 8) & 0xff; | |
1527 | *tp++ = (unsigned char)val & 0xff; | |
1528 | saw_xdigit = 0; | |
1529 | val = 0; | |
1530 | continue; | |
1531 | } | |
1532 | if(*src != '\0' && ch == '.') | |
1533 | { | |
1534 | if(((tp + INADDRSZ) <= endp) && inet_pton4(curtok, tp) > 0) | |
1535 | { | |
1536 | tp += INADDRSZ; | |
1537 | saw_xdigit = 0; | |
1538 | break; /* '\0' was seen by inet_pton4(). */ | |
1539 | } | |
1540 | } | |
1541 | else | |
1542 | continue; | |
1543 | return (0); | |
1544 | } | |
1545 | if(saw_xdigit) | |
1546 | { | |
1547 | if(tp + INT16SZ > endp) | |
1548 | return (0); | |
1549 | *tp++ = (unsigned char)(val >> 8) & 0xff; | |
1550 | *tp++ = (unsigned char)val & 0xff; | |
1551 | } | |
1552 | if(colonp != NULL) | |
1553 | { | |
1554 | /* | |
1555 | * Since some memmove()'s erroneously fail to handle | |
1556 | * overlapping regions, we'll do the shift by hand. | |
1557 | */ | |
1558 | const int n = tp - colonp; | |
1559 | int i; | |
1560 | ||
1561 | if(tp == endp) | |
1562 | return (0); | |
1563 | for(i = 1; i <= n; i++) | |
1564 | { | |
1565 | endp[-i] = colonp[n - i]; | |
1566 | colonp[n - i] = 0; | |
1567 | } | |
1568 | tp = endp; | |
1569 | } | |
1570 | if(tp != endp) | |
1571 | return (0); | |
1572 | memcpy(dst, tmp, IN6ADDRSZ); | |
1573 | return (1); | |
1574 | } | |
1575 | #endif | |
1576 | int | |
1577 | rb_inet_pton(int af, const char *src, void *dst) | |
1578 | { | |
1579 | switch (af) | |
1580 | { | |
1581 | case AF_INET: | |
1582 | return (inet_pton4(src, dst)); | |
1583 | #ifdef RB_IPV6 | |
1584 | case AF_INET6: | |
1585 | /* Somebody might have passed as an IPv4 address this is sick but it works */ | |
1586 | if(inet_pton4(src, dst)) | |
1587 | { | |
1588 | char tmp[HOSTIPLEN]; | |
1589 | sprintf(tmp, "::ffff:%s", src); | |
1590 | return (inet_pton6(tmp, dst)); | |
1591 | } | |
1592 | else | |
1593 | return (inet_pton6(src, dst)); | |
1594 | #endif | |
1595 | default: | |
1596 | return (-1); | |
1597 | } | |
1598 | /* NOTREACHED */ | |
1599 | } | |
1600 | ||
1601 | ||
1602 | #ifndef HAVE_SOCKETPAIR | |
1603 | ||
1604 | /* mostly based on perl's emulation of socketpair udp */ | |
1605 | static int | |
1606 | rb_inet_socketpair_udp(rb_fde_t **newF1, rb_fde_t **newF2) | |
1607 | { | |
1608 | struct sockaddr_in addr[2]; | |
1609 | rb_socklen_t size = sizeof(struct sockaddr_in); | |
1610 | rb_fde_t *F[2]; | |
1611 | rb_platform_fd_t fd[2]; | |
1612 | int i, got; | |
1613 | unsigned short port; | |
1614 | struct timeval wait = { 0, 100000 }; | |
1615 | int max; | |
1616 | fd_set rset; | |
1617 | struct sockaddr_in readfrom; | |
1618 | unsigned short buf[2]; | |
1619 | int o_errno; | |
1620 | ||
1621 | memset(&addr, 0, sizeof(addr)); | |
1622 | ||
1623 | for(i = 0; i < 2; i++) | |
1624 | { | |
1625 | F[i] = rb_socket(AF_INET, SOCK_DGRAM, 0, "udp socketpair"); | |
1626 | if(F[i] == NULL) | |
1627 | goto failed; | |
1628 | addr[i].sin_family = AF_INET; | |
1629 | addr[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1630 | addr[i].sin_port = 0; | |
1631 | if(bind(rb_get_fd(F[i]), (struct sockaddr *)&addr[i], sizeof(struct sockaddr_in))) | |
1632 | goto failed; | |
1633 | fd[i] = rb_get_fd(F[i]); | |
1634 | } | |
1635 | ||
1636 | for(i = 0; i < 2; i++) | |
1637 | { | |
1638 | if(getsockname(fd[i], (struct sockaddr *)&addr[i], &size)) | |
1639 | goto failed; | |
1640 | if(size != sizeof(struct sockaddr_in)) | |
1641 | goto failed; | |
1642 | if(connect(fd[!i], (struct sockaddr *)&addr[i], sizeof(struct sockaddr_in)) == -1) | |
1643 | goto failed; | |
1644 | } | |
1645 | ||
1646 | for(i = 0; i < 2; i++) | |
1647 | { | |
1648 | port = addr[i].sin_port; | |
1649 | got = rb_write(F[i], &port, sizeof(port)); | |
1650 | if(got != sizeof(port)) | |
1651 | { | |
1652 | if(got == -1) | |
1653 | goto failed; | |
1654 | goto abort_failed; | |
1655 | } | |
1656 | } | |
1657 | ||
1658 | max = fd[1] > fd[0] ? fd[1] : fd[0]; | |
1659 | FD_ZERO(&rset); | |
1660 | FD_SET(fd[0], &rset); | |
1661 | FD_SET(fd[1], &rset); | |
1662 | got = select(max + 1, &rset, NULL, NULL, &wait); | |
1663 | if(got != 2 || !FD_ISSET(fd[0], &rset) || !FD_ISSET(fd[1], &rset)) | |
1664 | { | |
1665 | if(got == -1) | |
1666 | goto failed; | |
1667 | goto abort_failed; | |
1668 | } | |
1669 | ||
1670 | for(i = 0; i < 2; i++) | |
1671 | { | |
1672 | #ifdef MSG_DONTWAIT | |
1673 | int flag = MSG_DONTWAIT | |
1674 | #else | |
1675 | int flag = 0; | |
1676 | #endif | |
1677 | got = recvfrom(rb_get_fd(F[i]), (char *)&buf, sizeof(buf), flag, | |
1678 | (struct sockaddr *)&readfrom, &size); | |
1679 | if(got == -1) | |
1680 | goto failed; | |
1681 | if(got != sizeof(port) | |
1682 | || size != sizeof(struct sockaddr_in) | |
1683 | || buf[0] != (unsigned short)addr[!i].sin_port | |
1684 | || readfrom.sin_family != addr[!i].sin_family | |
1685 | || readfrom.sin_addr.s_addr != addr[!i].sin_addr.s_addr | |
1686 | || readfrom.sin_port != addr[!i].sin_port) | |
1687 | goto abort_failed; | |
1688 | } | |
1689 | ||
1690 | *newF1 = F[0]; | |
1691 | *newF2 = F[1]; | |
1692 | return 0; | |
1693 | ||
1694 | #ifdef _WIN32 | |
1695 | #ifndef ECONNABORTED | |
1696 | #define ECONNABORTED WSAECONNABORTED | |
1697 | #endif | |
1698 | #endif | |
1699 | ||
1700 | abort_failed: | |
1701 | rb_get_errno(); | |
1702 | errno = ECONNABORTED; | |
1703 | failed: | |
1704 | if(errno != ECONNABORTED) | |
1705 | rb_get_errno(); | |
1706 | o_errno = errno; | |
1707 | if(F[0] != NULL) | |
1708 | rb_close(F[0]); | |
1709 | if(F[1] != NULL) | |
1710 | rb_close(F[1]); | |
1711 | errno = o_errno; | |
1712 | return -1; | |
1713 | } | |
1714 | ||
1715 | ||
1716 | int | |
1717 | rb_inet_socketpair(int family, int type, int protocol, rb_platform_fd_t fd[2]) | |
1718 | { | |
1719 | int listener = -1; | |
1720 | int connector = -1; | |
1721 | int acceptor = -1; | |
1722 | struct sockaddr_in listen_addr; | |
1723 | struct sockaddr_in connect_addr; | |
1724 | rb_socklen_t size; | |
1725 | ||
1726 | if(protocol || family != AF_INET) | |
1727 | { | |
1728 | errno = EAFNOSUPPORT; | |
1729 | return -1; | |
1730 | } | |
1731 | if(!fd) | |
1732 | { | |
1733 | errno = EINVAL; | |
1734 | return -1; | |
1735 | } | |
1736 | ||
1737 | listener = socket(AF_INET, type, 0); | |
1738 | if(listener == -1) | |
1739 | return -1; | |
1740 | memset(&listen_addr, 0, sizeof(listen_addr)); | |
1741 | listen_addr.sin_family = AF_INET; | |
1742 | listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
1743 | listen_addr.sin_port = 0; /* kernel choses port. */ | |
1744 | if(bind(listener, (struct sockaddr *)&listen_addr, sizeof(listen_addr)) == -1) | |
1745 | goto tidy_up_and_fail; | |
1746 | if(listen(listener, 1) == -1) | |
1747 | goto tidy_up_and_fail; | |
1748 | ||
1749 | connector = socket(AF_INET, type, 0); | |
1750 | if(connector == -1) | |
1751 | goto tidy_up_and_fail; | |
1752 | /* We want to find out the port number to connect to. */ | |
1753 | size = sizeof(connect_addr); | |
1754 | if(getsockname(listener, (struct sockaddr *)&connect_addr, &size) == -1) | |
1755 | goto tidy_up_and_fail; | |
1756 | if(size != sizeof(connect_addr)) | |
1757 | goto abort_tidy_up_and_fail; | |
1758 | if(connect(connector, (struct sockaddr *)&connect_addr, sizeof(connect_addr)) == -1) | |
1759 | goto tidy_up_and_fail; | |
1760 | ||
1761 | size = sizeof(listen_addr); | |
1762 | acceptor = accept(listener, (struct sockaddr *)&listen_addr, &size); | |
1763 | if(acceptor == -1) | |
1764 | goto tidy_up_and_fail; | |
1765 | if(size != sizeof(listen_addr)) | |
1766 | goto abort_tidy_up_and_fail; | |
1767 | close(listener); | |
1768 | /* Now check we are talking to ourself by matching port and host on the | |
1769 | two sockets. */ | |
1770 | if(getsockname(connector, (struct sockaddr *)&connect_addr, &size) == -1) | |
1771 | goto tidy_up_and_fail; | |
1772 | if(size != sizeof(connect_addr) | |
1773 | || listen_addr.sin_family != connect_addr.sin_family | |
1774 | || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr | |
1775 | || listen_addr.sin_port != connect_addr.sin_port) | |
1776 | { | |
1777 | goto abort_tidy_up_and_fail; | |
1778 | } | |
1779 | fd[0] = connector; | |
1780 | fd[1] = acceptor; | |
1781 | return 0; | |
1782 | ||
1783 | abort_tidy_up_and_fail: | |
1784 | errno = EINVAL; /* I hope this is portable and appropriate. */ | |
1785 | ||
1786 | tidy_up_and_fail: | |
1787 | { | |
1788 | int save_errno = errno; | |
1789 | if(listener != -1) | |
1790 | close(listener); | |
1791 | if(connector != -1) | |
1792 | close(connector); | |
1793 | if(acceptor != -1) | |
1794 | close(acceptor); | |
1795 | errno = save_errno; | |
1796 | return -1; | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | #endif | |
1801 | ||
1802 | ||
1803 | static void (*setselect_handler) (rb_fde_t *, unsigned int, PF *, void *); | |
1804 | static int (*select_handler) (long); | |
1805 | static int (*setup_fd_handler) (rb_fde_t *); | |
1806 | static int (*io_sched_event) (struct ev_entry *, int); | |
1807 | static void (*io_unsched_event) (struct ev_entry *); | |
1808 | static int (*io_supports_event) (void); | |
1809 | static void (*io_init_event) (void); | |
1810 | static char iotype[25]; | |
1811 | ||
1812 | const char * | |
1813 | rb_get_iotype(void) | |
1814 | { | |
1815 | return iotype; | |
1816 | } | |
1817 | ||
1818 | static int | |
1819 | rb_unsupported_event(void) | |
1820 | { | |
1821 | return 0; | |
1822 | } | |
1823 | ||
1824 | static int | |
1825 | try_kqueue(void) | |
1826 | { | |
1827 | if(!rb_init_netio_kqueue()) | |
1828 | { | |
1829 | setselect_handler = rb_setselect_kqueue; | |
1830 | select_handler = rb_select_kqueue; | |
1831 | setup_fd_handler = rb_setup_fd_kqueue; | |
1832 | io_sched_event = rb_kqueue_sched_event; | |
1833 | io_unsched_event = rb_kqueue_unsched_event; | |
1834 | io_init_event = rb_kqueue_init_event; | |
1835 | io_supports_event = rb_kqueue_supports_event; | |
1836 | rb_strlcpy(iotype, "kqueue", sizeof(iotype)); | |
1837 | return 0; | |
1838 | } | |
1839 | return -1; | |
1840 | } | |
1841 | ||
1842 | static int | |
1843 | try_epoll(void) | |
1844 | { | |
1845 | if(!rb_init_netio_epoll()) | |
1846 | { | |
1847 | setselect_handler = rb_setselect_epoll; | |
1848 | select_handler = rb_select_epoll; | |
1849 | setup_fd_handler = rb_setup_fd_epoll; | |
1850 | io_sched_event = rb_epoll_sched_event; | |
1851 | io_unsched_event = rb_epoll_unsched_event; | |
1852 | io_supports_event = rb_epoll_supports_event; | |
1853 | io_init_event = rb_epoll_init_event; | |
1854 | rb_strlcpy(iotype, "epoll", sizeof(iotype)); | |
1855 | return 0; | |
1856 | } | |
1857 | return -1; | |
1858 | } | |
1859 | ||
1860 | static int | |
1861 | try_ports(void) | |
1862 | { | |
1863 | if(!rb_init_netio_ports()) | |
1864 | { | |
1865 | setselect_handler = rb_setselect_ports; | |
1866 | select_handler = rb_select_ports; | |
1867 | setup_fd_handler = rb_setup_fd_ports; | |
1868 | io_sched_event = rb_ports_sched_event; | |
1869 | io_unsched_event = rb_ports_unsched_event; | |
1870 | io_init_event = rb_ports_init_event; | |
1871 | io_supports_event = rb_ports_supports_event; | |
1872 | rb_strlcpy(iotype, "ports", sizeof(iotype)); | |
1873 | return 0; | |
1874 | } | |
1875 | return -1; | |
1876 | } | |
1877 | ||
1878 | static int | |
1879 | try_devpoll(void) | |
1880 | { | |
1881 | if(!rb_init_netio_devpoll()) | |
1882 | { | |
1883 | setselect_handler = rb_setselect_devpoll; | |
1884 | select_handler = rb_select_devpoll; | |
1885 | setup_fd_handler = rb_setup_fd_devpoll; | |
1886 | io_sched_event = NULL; | |
1887 | io_unsched_event = NULL; | |
1888 | io_init_event = NULL; | |
1889 | io_supports_event = rb_unsupported_event; | |
1890 | rb_strlcpy(iotype, "devpoll", sizeof(iotype)); | |
1891 | return 0; | |
1892 | } | |
1893 | return -1; | |
1894 | } | |
1895 | ||
1896 | static int | |
1897 | try_sigio(void) | |
1898 | { | |
1899 | if(!rb_init_netio_sigio()) | |
1900 | { | |
1901 | setselect_handler = rb_setselect_sigio; | |
1902 | select_handler = rb_select_sigio; | |
1903 | setup_fd_handler = rb_setup_fd_sigio; | |
1904 | io_sched_event = rb_sigio_sched_event; | |
1905 | io_unsched_event = rb_sigio_unsched_event; | |
1906 | io_supports_event = rb_sigio_supports_event; | |
1907 | io_init_event = rb_sigio_init_event; | |
1908 | ||
1909 | rb_strlcpy(iotype, "sigio", sizeof(iotype)); | |
1910 | return 0; | |
1911 | } | |
1912 | return -1; | |
1913 | } | |
1914 | ||
1915 | static int | |
1916 | try_poll(void) | |
1917 | { | |
1918 | if(!rb_init_netio_poll()) | |
1919 | { | |
1920 | setselect_handler = rb_setselect_poll; | |
1921 | select_handler = rb_select_poll; | |
1922 | setup_fd_handler = rb_setup_fd_poll; | |
1923 | io_sched_event = NULL; | |
1924 | io_unsched_event = NULL; | |
1925 | io_init_event = NULL; | |
1926 | io_supports_event = rb_unsupported_event; | |
1927 | rb_strlcpy(iotype, "poll", sizeof(iotype)); | |
1928 | return 0; | |
1929 | } | |
1930 | return -1; | |
1931 | } | |
1932 | ||
1933 | static int | |
1934 | try_win32(void) | |
1935 | { | |
1936 | if(!rb_init_netio_win32()) | |
1937 | { | |
1938 | setselect_handler = rb_setselect_win32; | |
1939 | select_handler = rb_select_win32; | |
1940 | setup_fd_handler = rb_setup_fd_win32; | |
1941 | io_sched_event = NULL; | |
1942 | io_unsched_event = NULL; | |
1943 | io_init_event = NULL; | |
1944 | io_supports_event = rb_unsupported_event; | |
1945 | rb_strlcpy(iotype, "win32", sizeof(iotype)); | |
1946 | return 0; | |
1947 | } | |
1948 | return -1; | |
1949 | } | |
1950 | ||
1951 | static int | |
1952 | try_select(void) | |
1953 | { | |
1954 | if(!rb_init_netio_select()) | |
1955 | { | |
1956 | setselect_handler = rb_setselect_select; | |
1957 | select_handler = rb_select_select; | |
1958 | setup_fd_handler = rb_setup_fd_select; | |
1959 | io_sched_event = NULL; | |
1960 | io_unsched_event = NULL; | |
1961 | io_init_event = NULL; | |
1962 | io_supports_event = rb_unsupported_event; | |
1963 | rb_strlcpy(iotype, "select", sizeof(iotype)); | |
1964 | return 0; | |
1965 | } | |
1966 | return -1; | |
1967 | } | |
1968 | ||
1969 | ||
1970 | int | |
1971 | rb_io_sched_event(struct ev_entry *ev, int when) | |
1972 | { | |
1973 | if(ev == NULL || io_supports_event == NULL || io_sched_event == NULL | |
1974 | || !io_supports_event()) | |
1975 | return 0; | |
1976 | return io_sched_event(ev, when); | |
1977 | } | |
1978 | ||
1979 | void | |
1980 | rb_io_unsched_event(struct ev_entry *ev) | |
1981 | { | |
1982 | if(ev == NULL || io_supports_event == NULL || io_unsched_event == NULL | |
1983 | || !io_supports_event()) | |
1984 | return; | |
1985 | io_unsched_event(ev); | |
1986 | } | |
1987 | ||
1988 | int | |
1989 | rb_io_supports_event(void) | |
1990 | { | |
1991 | if(io_supports_event == NULL) | |
1992 | return 0; | |
1993 | return io_supports_event(); | |
1994 | } | |
1995 | ||
1996 | void | |
1997 | rb_io_init_event(void) | |
1998 | { | |
1999 | io_init_event(); | |
2000 | rb_event_io_register_all(); | |
2001 | } | |
2002 | ||
2003 | void | |
2004 | rb_init_netio(void) | |
2005 | { | |
2006 | char *ioenv = getenv("LIBRB_USE_IOTYPE"); | |
2007 | rb_fd_table = rb_malloc(RB_FD_HASH_SIZE * sizeof(rb_dlink_list)); | |
2008 | rb_init_ssl(); | |
2009 | ||
2010 | if(ioenv != NULL) | |
2011 | { | |
2012 | if(!strcmp("epoll", ioenv)) | |
2013 | { | |
2014 | if(!try_epoll()) | |
2015 | return; | |
2016 | } | |
2017 | else if(!strcmp("kqueue", ioenv)) | |
2018 | { | |
2019 | if(!try_kqueue()) | |
2020 | return; | |
2021 | } | |
2022 | else if(!strcmp("ports", ioenv)) | |
2023 | { | |
2024 | if(!try_ports()) | |
2025 | return; | |
2026 | } | |
2027 | else if(!strcmp("poll", ioenv)) | |
2028 | { | |
2029 | if(!try_poll()) | |
2030 | return; | |
2031 | } | |
2032 | else if(!strcmp("devpoll", ioenv)) | |
2033 | { | |
2034 | if(!try_devpoll()) | |
2035 | return; | |
2036 | } | |
2037 | else if(!strcmp("sigio", ioenv)) | |
2038 | { | |
2039 | if(!try_sigio()) | |
2040 | return; | |
2041 | } | |
2042 | else if(!strcmp("select", ioenv)) | |
2043 | { | |
2044 | if(!try_select()) | |
2045 | return; | |
2046 | } | |
2047 | if(!strcmp("win32", ioenv)) | |
2048 | { | |
2049 | if(!try_win32()) | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | } | |
2054 | ||
2055 | if(!try_kqueue()) | |
2056 | return; | |
2057 | if(!try_epoll()) | |
2058 | return; | |
2059 | if(!try_ports()) | |
2060 | return; | |
2061 | if(!try_devpoll()) | |
2062 | return; | |
2063 | if(!try_sigio()) | |
2064 | return; | |
2065 | if(!try_poll()) | |
2066 | return; | |
2067 | if(!try_win32()) | |
2068 | return; | |
2069 | if(!try_select()) | |
2070 | return; | |
2071 | ||
2072 | rb_lib_log("rb_init_netio: Could not find any io handlers...giving up"); | |
2073 | ||
2074 | abort(); | |
2075 | } | |
2076 | ||
2077 | void | |
2078 | rb_setselect(rb_fde_t *F, unsigned int type, PF * handler, void *client_data) | |
2079 | { | |
2080 | setselect_handler(F, type, handler, client_data); | |
2081 | } | |
2082 | ||
2083 | int | |
2084 | rb_select(unsigned long timeout) | |
2085 | { | |
2086 | int ret = select_handler(timeout); | |
2087 | free_fds(); | |
2088 | return ret; | |
2089 | } | |
2090 | ||
2091 | int | |
2092 | rb_setup_fd(rb_fde_t *F) | |
2093 | { | |
2094 | return setup_fd_handler(F); | |
2095 | } | |
2096 | ||
2097 | ||
2098 | ||
2099 | int | |
2100 | rb_ignore_errno(int error) | |
2101 | { | |
2102 | switch (error) | |
2103 | { | |
2104 | #ifdef EINPROGRESS | |
2105 | case EINPROGRESS: | |
2106 | #endif | |
2107 | #if defined EWOULDBLOCK | |
2108 | case EWOULDBLOCK: | |
2109 | #endif | |
2110 | #if defined(EAGAIN) && (EWOULDBLOCK != EAGAIN) | |
2111 | case EAGAIN: | |
2112 | #endif | |
2113 | #ifdef EINTR | |
2114 | case EINTR: | |
2115 | #endif | |
2116 | #ifdef ERESTART | |
2117 | case ERESTART: | |
2118 | #endif | |
2119 | #ifdef ENOBUFS | |
2120 | case ENOBUFS: | |
2121 | #endif | |
2122 | return 1; | |
2123 | default: | |
2124 | break; | |
2125 | } | |
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | ||
2130 | #if defined(HAVE_SENDMSG) && !defined(WIN32) | |
2131 | int | |
2132 | rb_recv_fd_buf(rb_fde_t *F, void *data, size_t datasize, rb_fde_t **xF, int nfds) | |
2133 | { | |
2134 | struct msghdr msg; | |
2135 | struct cmsghdr *cmsg; | |
2136 | struct iovec iov[1]; | |
2137 | struct stat st; | |
2138 | uint8_t stype = RB_FD_UNKNOWN; | |
2139 | const char *desc; | |
2140 | rb_platform_fd_t fd, len, x, rfds; | |
2141 | ||
2142 | int control_len = CMSG_SPACE(sizeof(int) * nfds); | |
2143 | ||
2144 | iov[0].iov_base = data; | |
2145 | iov[0].iov_len = datasize; | |
2146 | ||
2147 | msg.msg_name = NULL; | |
2148 | msg.msg_namelen = 0; | |
2149 | msg.msg_iov = iov; | |
2150 | msg.msg_iovlen = 1; | |
2151 | msg.msg_flags = 0; | |
2152 | cmsg = alloca(control_len); | |
2153 | msg.msg_control = cmsg; | |
2154 | msg.msg_controllen = control_len; | |
2155 | ||
2156 | if((len = recvmsg(rb_get_fd(F), &msg, 0)) <= 0) | |
2157 | return len; | |
2158 | ||
2159 | if(msg.msg_controllen > 0 && msg.msg_control != NULL | |
2160 | && (cmsg = CMSG_FIRSTHDR(&msg)) != NULL) | |
2161 | { | |
2162 | rfds = ((unsigned char *)cmsg + cmsg->cmsg_len - CMSG_DATA(cmsg)) / sizeof(int); | |
2163 | ||
2164 | for(x = 0; x < nfds && x < rfds; x++) | |
2165 | { | |
2166 | fd = ((int *)CMSG_DATA(cmsg))[x]; | |
2167 | stype = RB_FD_UNKNOWN; | |
2168 | desc = "remote unknown"; | |
2169 | if(!fstat(fd, &st)) | |
2170 | { | |
2171 | if(S_ISSOCK(st.st_mode)) | |
2172 | { | |
2173 | stype = RB_FD_SOCKET; | |
2174 | desc = "remote socket"; | |
2175 | } | |
2176 | else if(S_ISFIFO(st.st_mode)) | |
2177 | { | |
2178 | stype = RB_FD_PIPE; | |
2179 | desc = "remote pipe"; | |
2180 | } | |
2181 | else if(S_ISREG(st.st_mode)) | |
2182 | { | |
2183 | stype = RB_FD_FILE; | |
2184 | desc = "remote file"; | |
2185 | } | |
2186 | } | |
2187 | xF[x] = rb_open(fd, stype, desc); | |
2188 | } | |
2189 | } | |
2190 | else | |
2191 | *xF = NULL; | |
2192 | return len; | |
2193 | } | |
2194 | ||
2195 | ||
2196 | int | |
2197 | rb_send_fd_buf(rb_fde_t *xF, rb_fde_t **F, int count, void *data, size_t datasize, pid_t pid) | |
2198 | { | |
2199 | struct msghdr msg; | |
2200 | struct cmsghdr *cmsg; | |
2201 | struct iovec iov[1]; | |
2202 | char empty = '0'; | |
2203 | ||
2204 | memset(&msg, 0, sizeof(msg)); | |
2205 | if(datasize == 0) | |
2206 | { | |
2207 | iov[0].iov_base = ∅ | |
2208 | iov[0].iov_len = 1; | |
2209 | } | |
2210 | else | |
2211 | { | |
2212 | iov[0].iov_base = data; | |
2213 | iov[0].iov_len = datasize; | |
2214 | } | |
2215 | msg.msg_iov = iov; | |
2216 | msg.msg_iovlen = 1; | |
2217 | msg.msg_name = NULL; | |
2218 | msg.msg_namelen = 0; | |
2219 | msg.msg_flags = 0; | |
2220 | msg.msg_control = NULL; | |
2221 | msg.msg_controllen = 0; | |
2222 | ||
2223 | if(count > 0) | |
2224 | { | |
2225 | size_t ucount = (size_t)count; | |
2226 | int len = CMSG_SPACE(sizeof(int) * count); | |
2227 | char buf[len]; | |
2228 | ||
2229 | msg.msg_control = buf; | |
2230 | msg.msg_controllen = len; | |
2231 | cmsg = CMSG_FIRSTHDR(&msg); | |
2232 | cmsg->cmsg_level = SOL_SOCKET; | |
2233 | cmsg->cmsg_type = SCM_RIGHTS; | |
2234 | cmsg->cmsg_len = CMSG_LEN(sizeof(int) * count); | |
2235 | ||
2236 | for(size_t i = 0; i < ucount; i++) | |
2237 | { | |
2238 | ((int *)CMSG_DATA(cmsg))[i] = rb_get_fd(F[i]); | |
2239 | } | |
2240 | msg.msg_controllen = cmsg->cmsg_len; | |
2241 | return sendmsg(rb_get_fd(xF), &msg, MSG_NOSIGNAL); | |
2242 | } | |
2243 | return sendmsg(rb_get_fd(xF), &msg, MSG_NOSIGNAL); | |
2244 | } | |
2245 | #else | |
2246 | #ifndef _WIN32 | |
2247 | int | |
2248 | rb_recv_fd_buf(rb_fde_t *F, void *data, size_t datasize, rb_fde_t **xF, int nfds) | |
2249 | { | |
2250 | errno = ENOSYS; | |
2251 | return -1; | |
2252 | } | |
2253 | ||
2254 | int | |
2255 | rb_send_fd_buf(rb_fde_t *xF, rb_fde_t **F, int count, void *data, size_t datasize, pid_t pid) | |
2256 | { | |
2257 | errno = ENOSYS; | |
2258 | return -1; | |
2259 | } | |
2260 | #endif | |
2261 | #endif |