/[svn]/ircd-hybrid-8/src/s_bsd.c
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Contents of /ircd-hybrid-8/src/s_bsd.c

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Revision 1309 - (show annotations)
Sun Mar 25 11:24:18 2012 UTC (8 years, 6 months ago) by michael
File MIME type: text/x-chdr
File size: 21475 byte(s)
- renaming files:

  ircd_parser.y -> conf_parser.y
  ircd_lexer.l  -> conf_lexer.l
  s_conf.c      -> conf.c
  s_conf.h      -> conf.h
  s_log.c       -> log.c
  s_log.h       -> log.h

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * s_bsd.c: Network functions.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include <netinet/in_systm.h>
27 #include <netinet/ip.h>
28 #include <netinet/tcp.h>
29 #include "list.h"
30 #include "fdlist.h"
31 #include "s_bsd.h"
32 #include "client.h"
33 #include "dbuf.h"
34 #include "event.h"
35 #include "irc_string.h"
36 #include "ircd.h"
37 #include "listener.h"
38 #include "numeric.h"
39 #include "packet.h"
40 #include "irc_res.h"
41 #include "restart.h"
42 #include "s_auth.h"
43 #include "conf.h"
44 #include "log.h"
45 #include "s_serv.h"
46 #include "send.h"
47 #include "memory.h"
48 #include "s_user.h"
49 #include "hook.h"
50
51 static const char *comm_err_str[] = { "Comm OK", "Error during bind()",
52 "Error during DNS lookup", "connect timeout", "Error during connect()",
53 "Comm Error" };
54
55 struct Callback *setup_socket_cb = NULL;
56
57 static void comm_connect_callback(fde_t *, int);
58 static PF comm_connect_timeout;
59 static void comm_connect_dns_callback(void *, const struct irc_ssaddr *, const char *);
60 static PF comm_connect_tryconnect;
61
62
63 /* check_can_use_v6()
64 * Check if the system can open AF_INET6 sockets
65 */
66 void
67 check_can_use_v6(void)
68 {
69 #ifdef IPV6
70 int v6;
71
72 if ((v6 = socket(AF_INET6, SOCK_STREAM, 0)) < 0)
73 ServerInfo.can_use_v6 = 0;
74 else
75 {
76 ServerInfo.can_use_v6 = 1;
77 close(v6);
78 }
79 #else
80 ServerInfo.can_use_v6 = 0;
81 #endif
82 }
83
84 /* get_sockerr - get the error value from the socket or the current errno
85 *
86 * Get the *real* error from the socket (well try to anyway..).
87 * This may only work when SO_DEBUG is enabled but its worth the
88 * gamble anyway.
89 */
90 int
91 get_sockerr(int fd)
92 {
93 int errtmp = errno;
94 #ifdef SO_ERROR
95 int err = 0;
96 socklen_t len = sizeof(err);
97
98 if (-1 < fd && !getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len))
99 {
100 if (err)
101 errtmp = err;
102 }
103 errno = errtmp;
104 #endif
105 return errtmp;
106 }
107
108 /*
109 * report_error - report an error from an errno.
110 * Record error to log and also send a copy to all *LOCAL* opers online.
111 *
112 * text is a *format* string for outputing error. It must
113 * contain only two '%s', the first will be replaced
114 * by the sockhost from the client_p, and the latter will
115 * be taken from sys_errlist[errno].
116 *
117 * client_p if not NULL, is the *LOCAL* client associated with
118 * the error.
119 *
120 * Cannot use perror() within daemon. stderr is closed in
121 * ircd and cannot be used. And, worse yet, it might have
122 * been reassigned to a normal connection...
123 *
124 * Actually stderr is still there IFF ircd was run with -s --Rodder
125 */
126
127 void
128 report_error(int level, const char* text, const char* who, int error)
129 {
130 who = (who) ? who : "";
131
132 sendto_realops_flags(UMODE_DEBUG, level, text, who, strerror(error));
133 ilog(LOG_TYPE_IRCD, text, who, strerror(error));
134 }
135
136 /*
137 * setup_socket()
138 *
139 * Set the socket non-blocking, and other wonderful bits.
140 */
141 static void *
142 setup_socket(va_list args)
143 {
144 int fd = va_arg(args, int);
145 int opt = 1;
146
147 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
148
149 #ifdef IPTOS_LOWDELAY
150 opt = IPTOS_LOWDELAY;
151 setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt));
152 #endif
153
154 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
155
156 return NULL;
157 }
158
159 /*
160 * init_comm()
161 *
162 * Initializes comm subsystem.
163 */
164 void
165 init_comm(void)
166 {
167 setup_socket_cb = register_callback("setup_socket", setup_socket);
168 init_netio();
169 }
170
171 /*
172 * close_connection
173 * Close the physical connection. This function must make
174 * MyConnect(client_p) == FALSE, and set client_p->from == NULL.
175 */
176 void
177 close_connection(struct Client *client_p)
178 {
179 struct ConfItem *conf;
180 struct AccessItem *aconf;
181 struct ClassItem *aclass;
182
183 assert(NULL != client_p);
184
185 if (!IsDead(client_p))
186 {
187 /* attempt to flush any pending dbufs. Evil, but .. -- adrian */
188 /* there is still a chance that we might send data to this socket
189 * even if it is marked as blocked (COMM_SELECT_READ handler is called
190 * before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx
191 */
192 ClearSendqBlocked(client_p);
193 send_queued_write(client_p);
194 }
195
196 if (IsClient(client_p))
197 {
198 ++ServerStats.is_cl;
199 ServerStats.is_cbs += client_p->localClient->send.bytes;
200 ServerStats.is_cbr += client_p->localClient->recv.bytes;
201 ServerStats.is_cti += CurrentTime - client_p->localClient->firsttime;
202 }
203 else if (IsServer(client_p))
204 {
205 ++ServerStats.is_sv;
206 ServerStats.is_sbs += client_p->localClient->send.bytes;
207 ServerStats.is_sbr += client_p->localClient->recv.bytes;
208 ServerStats.is_sti += CurrentTime - client_p->localClient->firsttime;
209
210 /* XXX Does this even make any sense at all anymore?
211 * scheduling a 'quick' reconnect could cause a pile of
212 * nick collides under TSora protocol... -db
213 */
214 /*
215 * If the connection has been up for a long amount of time, schedule
216 * a 'quick' reconnect, else reset the next-connect cycle.
217 */
218 if ((conf = find_conf_exact(SERVER_TYPE, client_p->name,
219 client_p->username, client_p->host)))
220 {
221 /*
222 * Reschedule a faster reconnect, if this was a automatically
223 * connected configuration entry. (Note that if we have had
224 * a rehash in between, the status has been changed to
225 * CONF_ILLEGAL). But only do this if it was a "good" link.
226 */
227 aconf = map_to_conf(conf);
228 aclass = map_to_conf(aconf->class_ptr);
229 aconf->hold = time(NULL);
230 aconf->hold += (aconf->hold - client_p->localClient->since > HANGONGOODLINK) ?
231 HANGONRETRYDELAY : ConFreq(aclass);
232 }
233 }
234 else
235 ++ServerStats.is_ni;
236
237 #ifdef HAVE_LIBCRYPTO
238 if (client_p->localClient->fd.ssl)
239 {
240 SSL_set_shutdown(client_p->localClient->fd.ssl, SSL_RECEIVED_SHUTDOWN);
241
242 if (!SSL_shutdown(client_p->localClient->fd.ssl))
243 SSL_shutdown(client_p->localClient->fd.ssl);
244 }
245 #endif
246 if (client_p->localClient->fd.flags.open)
247 fd_close(&client_p->localClient->fd);
248
249 dbuf_clear(&client_p->localClient->buf_sendq);
250 dbuf_clear(&client_p->localClient->buf_recvq);
251
252 MyFree(client_p->localClient->passwd);
253 detach_conf(client_p, CONF_TYPE);
254 client_p->from = NULL; /* ...this should catch them! >:) --msa */
255 }
256
257 #ifdef HAVE_LIBCRYPTO
258 /*
259 * ssl_handshake - let OpenSSL initialize the protocol. Register for
260 * read/write events if necessary.
261 */
262 static void
263 ssl_handshake(int fd, struct Client *client_p)
264 {
265 int ret = SSL_accept(client_p->localClient->fd.ssl);
266
267 if (ret <= 0)
268 switch (SSL_get_error(client_p->localClient->fd.ssl, ret))
269 {
270 case SSL_ERROR_WANT_WRITE:
271 comm_setselect(&client_p->localClient->fd, COMM_SELECT_WRITE,
272 (PF *) ssl_handshake, client_p, 0);
273 return;
274
275 case SSL_ERROR_WANT_READ:
276 comm_setselect(&client_p->localClient->fd, COMM_SELECT_READ,
277 (PF *) ssl_handshake, client_p, 0);
278 return;
279
280 default:
281 exit_client(client_p, client_p, "Error during SSL handshake");
282 return;
283 }
284
285 execute_callback(auth_cb, client_p);
286 }
287 #endif
288
289 /*
290 * add_connection - creates a client which has just connected to us on
291 * the given fd. The sockhost field is initialized with the ip# of the host.
292 * An unique id is calculated now, in case it is needed for auth.
293 * The client is sent to the auth module for verification, and not put in
294 * any client list yet.
295 */
296 void
297 add_connection(struct Listener *listener, struct irc_ssaddr *irn, int fd)
298 {
299 struct Client *new_client = make_client(NULL);
300
301 fd_open(&new_client->localClient->fd, fd, 1,
302 (listener->flags & LISTENER_SSL) ?
303 "Incoming SSL connection" : "Incoming connection");
304
305 /*
306 * copy address to 'sockhost' as a string, copy it to host too
307 * so we have something valid to put into error messages...
308 */
309 memcpy(&new_client->localClient->ip, irn, sizeof(struct irc_ssaddr));
310
311 getnameinfo((struct sockaddr *)&new_client->localClient->ip,
312 new_client->localClient->ip.ss_len, new_client->sockhost,
313 sizeof(new_client->sockhost), NULL, 0, NI_NUMERICHOST);
314 new_client->localClient->aftype = new_client->localClient->ip.ss.ss_family;
315
316 if (new_client->sockhost[0] == ':' && new_client->sockhost[1] == ':')
317 {
318 strlcpy(new_client->host, "0", sizeof(new_client->host));
319 strlcpy(new_client->host+1, new_client->sockhost, sizeof(new_client->host)-1);
320 memmove(new_client->sockhost+1, new_client->sockhost, sizeof(new_client->sockhost)-1);
321 new_client->sockhost[0] = '0';
322 }
323 else
324 strlcpy(new_client->host, new_client->sockhost, sizeof(new_client->host));
325
326 new_client->localClient->listener = listener;
327 ++listener->ref_count;
328
329 #ifdef HAVE_LIBCRYPTO
330 if (listener->flags & LISTENER_SSL)
331 {
332 if ((new_client->localClient->fd.ssl = SSL_new(ServerInfo.server_ctx)) == NULL)
333 {
334 ilog(LOG_TYPE_IRCD, "SSL_new() ERROR! -- %s",
335 ERR_error_string(ERR_get_error(), NULL));
336
337 SetDead(new_client);
338 exit_client(new_client, new_client, "SSL_new failed");
339 return;
340 }
341
342 SSL_set_fd(new_client->localClient->fd.ssl, fd);
343 ssl_handshake(0, new_client);
344 }
345 else
346 #endif
347 execute_callback(auth_cb, new_client);
348 }
349
350 /*
351 * stolen from squid - its a neat (but overused! :) routine which we
352 * can use to see whether we can ignore this errno or not. It is
353 * generally useful for non-blocking network IO related errnos.
354 * -- adrian
355 */
356 int
357 ignoreErrno(int ierrno)
358 {
359 switch (ierrno)
360 {
361 case EINPROGRESS:
362 case EWOULDBLOCK:
363 #if EAGAIN != EWOULDBLOCK
364 case EAGAIN:
365 #endif
366 case EALREADY:
367 case EINTR:
368 #ifdef ERESTART
369 case ERESTART:
370 #endif
371 return 1;
372 default:
373 return 0;
374 }
375 }
376
377 /*
378 * comm_settimeout() - set the socket timeout
379 *
380 * Set the timeout for the fd
381 */
382 void
383 comm_settimeout(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
384 {
385 assert(fd->flags.open);
386
387 fd->timeout = CurrentTime + (timeout / 1000);
388 fd->timeout_handler = callback;
389 fd->timeout_data = cbdata;
390 }
391
392 /*
393 * comm_setflush() - set a flush function
394 *
395 * A flush function is simply a function called if found during
396 * comm_timeouts(). Its basically a second timeout, except in this case
397 * I'm too lazy to implement multiple timeout functions! :-)
398 * its kinda nice to have it separate, since this is designed for
399 * flush functions, and when comm_close() is implemented correctly
400 * with close functions, we _actually_ don't call comm_close() here ..
401 * -- originally Adrian's notes
402 * comm_close() is replaced with fd_close() in fdlist.c
403 */
404 void
405 comm_setflush(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
406 {
407 assert(fd->flags.open);
408
409 fd->flush_timeout = CurrentTime + (timeout / 1000);
410 fd->flush_handler = callback;
411 fd->flush_data = cbdata;
412 }
413
414 /*
415 * comm_checktimeouts() - check the socket timeouts
416 *
417 * All this routine does is call the given callback/cbdata, without closing
418 * down the file descriptor. When close handlers have been implemented,
419 * this will happen.
420 */
421 void
422 comm_checktimeouts(void *notused)
423 {
424 int i;
425 fde_t *F;
426 PF *hdl;
427 void *data;
428
429 for (i = 0; i < FD_HASH_SIZE; i++)
430 for (F = fd_hash[i]; F != NULL; F = fd_next_in_loop)
431 {
432 assert(F->flags.open);
433 fd_next_in_loop = F->hnext;
434
435 /* check flush functions */
436 if (F->flush_handler && F->flush_timeout > 0 &&
437 F->flush_timeout < CurrentTime)
438 {
439 hdl = F->flush_handler;
440 data = F->flush_data;
441 comm_setflush(F, 0, NULL, NULL);
442 hdl(F, data);
443 }
444
445 /* check timeouts */
446 if (F->timeout_handler && F->timeout > 0 &&
447 F->timeout < CurrentTime)
448 {
449 /* Call timeout handler */
450 hdl = F->timeout_handler;
451 data = F->timeout_data;
452 comm_settimeout(F, 0, NULL, NULL);
453 hdl(F, data);
454 }
455 }
456 }
457
458 /*
459 * void comm_connect_tcp(int fd, const char *host, unsigned short port,
460 * struct sockaddr *clocal, int socklen,
461 * CNCB *callback, void *data, int aftype, int timeout)
462 * Input: An fd to connect with, a host and port to connect to,
463 * a local sockaddr to connect from + length(or NULL to use the
464 * default), a callback, the data to pass into the callback, the
465 * address family.
466 * Output: None.
467 * Side-effects: A non-blocking connection to the host is started, and
468 * if necessary, set up for selection. The callback given
469 * may be called now, or it may be called later.
470 */
471 void
472 comm_connect_tcp(fde_t *fd, const char *host, unsigned short port,
473 struct sockaddr *clocal, int socklen, CNCB *callback,
474 void *data, int aftype, int timeout)
475 {
476 struct addrinfo hints, *res;
477 char portname[PORTNAMELEN + 1];
478
479 assert(callback);
480 fd->connect.callback = callback;
481 fd->connect.data = data;
482
483 fd->connect.hostaddr.ss.ss_family = aftype;
484 fd->connect.hostaddr.ss_port = htons(port);
485
486 /* Note that we're using a passed sockaddr here. This is because
487 * generally you'll be bind()ing to a sockaddr grabbed from
488 * getsockname(), so this makes things easier.
489 * XXX If NULL is passed as local, we should later on bind() to the
490 * virtual host IP, for completeness.
491 * -- adrian
492 */
493 if ((clocal != NULL) && (bind(fd->fd, clocal, socklen) < 0))
494 {
495 /* Failure, call the callback with COMM_ERR_BIND */
496 comm_connect_callback(fd, COMM_ERR_BIND);
497 /* ... and quit */
498 return;
499 }
500
501 /* Next, if we have been given an IP, get the addr and skip the
502 * DNS check (and head direct to comm_connect_tryconnect().
503 */
504 memset(&hints, 0, sizeof(hints));
505 hints.ai_family = AF_UNSPEC;
506 hints.ai_socktype = SOCK_STREAM;
507 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
508
509 snprintf(portname, sizeof(portname), "%d", port);
510
511 if (getaddrinfo(host, portname, &hints, &res))
512 {
513 /* Send the DNS request, for the next level */
514 if (aftype == AF_INET6)
515 gethost_byname_type(comm_connect_dns_callback, fd, host, T_AAAA);
516 else
517 gethost_byname_type(comm_connect_dns_callback, fd, host, T_A);
518 }
519 else
520 {
521 /* We have a valid IP, so we just call tryconnect */
522 /* Make sure we actually set the timeout here .. */
523 assert(res != NULL);
524 memcpy(&fd->connect.hostaddr, res->ai_addr, res->ai_addrlen);
525 fd->connect.hostaddr.ss_len = res->ai_addrlen;
526 fd->connect.hostaddr.ss.ss_family = res->ai_family;
527 freeaddrinfo(res);
528 comm_settimeout(fd, timeout*1000, comm_connect_timeout, NULL);
529 comm_connect_tryconnect(fd, NULL);
530 }
531 }
532
533 /*
534 * comm_connect_callback() - call the callback, and continue with life
535 */
536 static void
537 comm_connect_callback(fde_t *fd, int status)
538 {
539 CNCB *hdl;
540
541 /* This check is gross..but probably necessary */
542 if (fd->connect.callback == NULL)
543 return;
544
545 /* Clear the connect flag + handler */
546 hdl = fd->connect.callback;
547 fd->connect.callback = NULL;
548
549 /* Clear the timeout handler */
550 comm_settimeout(fd, 0, NULL, NULL);
551
552 /* Call the handler */
553 hdl(fd, status, fd->connect.data);
554 }
555
556 /*
557 * comm_connect_timeout() - this gets called when the socket connection
558 * times out. This *only* can be called once connect() is initially
559 * called ..
560 */
561 static void
562 comm_connect_timeout(fde_t *fd, void *notused)
563 {
564 /* error! */
565 comm_connect_callback(fd, COMM_ERR_TIMEOUT);
566 }
567
568 /*
569 * comm_connect_dns_callback() - called at the completion of the DNS request
570 *
571 * The DNS request has completed, so if we've got an error, return it,
572 * otherwise we initiate the connect()
573 */
574 static void
575 comm_connect_dns_callback(void *vptr, const struct irc_ssaddr *addr, const char *name)
576 {
577 fde_t *F = vptr;
578
579 if (name == NULL)
580 {
581 comm_connect_callback(F, COMM_ERR_DNS);
582 return;
583 }
584
585 /* No error, set a 10 second timeout */
586 comm_settimeout(F, 30*1000, comm_connect_timeout, NULL);
587
588 /* Copy over the DNS reply info so we can use it in the connect() */
589 /*
590 * Note we don't fudge the refcount here, because we aren't keeping
591 * the DNS record around, and the DNS cache is gone anyway..
592 * -- adrian
593 */
594 memcpy(&F->connect.hostaddr, addr, addr->ss_len);
595 /* The cast is hacky, but safe - port offset is same on v4 and v6 */
596 ((struct sockaddr_in *) &F->connect.hostaddr)->sin_port =
597 F->connect.hostaddr.ss_port;
598 F->connect.hostaddr.ss_len = addr->ss_len;
599
600 /* Now, call the tryconnect() routine to try a connect() */
601 comm_connect_tryconnect(F, NULL);
602 }
603
604 /* static void comm_connect_tryconnect(int fd, void *notused)
605 * Input: The fd, the handler data(unused).
606 * Output: None.
607 * Side-effects: Try and connect with pending connect data for the FD. If
608 * we succeed or get a fatal error, call the callback.
609 * Otherwise, it is still blocking or something, so register
610 * to select for a write event on this FD.
611 */
612 static void
613 comm_connect_tryconnect(fde_t *fd, void *notused)
614 {
615 int retval;
616
617 /* This check is needed or re-entrant s_bsd_* like sigio break it. */
618 if (fd->connect.callback == NULL)
619 return;
620
621 /* Try the connect() */
622 retval = connect(fd->fd, (struct sockaddr *) &fd->connect.hostaddr,
623 fd->connect.hostaddr.ss_len);
624
625 /* Error? */
626 if (retval < 0)
627 {
628 /*
629 * If we get EISCONN, then we've already connect()ed the socket,
630 * which is a good thing.
631 * -- adrian
632 */
633 if (errno == EISCONN)
634 comm_connect_callback(fd, COMM_OK);
635 else if (ignoreErrno(errno))
636 /* Ignore error? Reschedule */
637 comm_setselect(fd, COMM_SELECT_WRITE, comm_connect_tryconnect,
638 NULL, 0);
639 else
640 /* Error? Fail with COMM_ERR_CONNECT */
641 comm_connect_callback(fd, COMM_ERR_CONNECT);
642 return;
643 }
644
645 /* If we get here, we've suceeded, so call with COMM_OK */
646 comm_connect_callback(fd, COMM_OK);
647 }
648
649 /*
650 * comm_errorstr() - return an error string for the given error condition
651 */
652 const char *
653 comm_errstr(int error)
654 {
655 if (error < 0 || error >= COMM_ERR_MAX)
656 return "Invalid error number!";
657 return comm_err_str[error];
658 }
659
660 /*
661 * comm_open() - open a socket
662 *
663 * This is a highly highly cut down version of squid's comm_open() which
664 * for the most part emulates socket(), *EXCEPT* it fails if we're about
665 * to run out of file descriptors.
666 */
667 int
668 comm_open(fde_t *F, int family, int sock_type, int proto, const char *note)
669 {
670 int fd;
671
672 /* First, make sure we aren't going to run out of file descriptors */
673 if (number_fd >= hard_fdlimit)
674 {
675 errno = ENFILE;
676 return -1;
677 }
678
679 /*
680 * Next, we try to open the socket. We *should* drop the reserved FD
681 * limit if/when we get an error, but we can deal with that later.
682 * XXX !!! -- adrian
683 */
684 fd = socket(family, sock_type, proto);
685 if (fd < 0)
686 return -1; /* errno will be passed through, yay.. */
687
688 execute_callback(setup_socket_cb, fd);
689
690 /* update things in our fd tracking */
691 fd_open(F, fd, 1, note);
692 return 0;
693 }
694
695 /*
696 * comm_accept() - accept an incoming connection
697 *
698 * This is a simple wrapper for accept() which enforces FD limits like
699 * comm_open() does. Returned fd must be either closed or tagged with
700 * fd_open (this function no longer does it).
701 */
702 int
703 comm_accept(struct Listener *lptr, struct irc_ssaddr *pn)
704 {
705 int newfd;
706 socklen_t addrlen = sizeof(struct irc_ssaddr);
707
708 if (number_fd >= hard_fdlimit)
709 {
710 errno = ENFILE;
711 return -1;
712 }
713
714 /*
715 * Next, do the accept(). if we get an error, we should drop the
716 * reserved fd limit, but we can deal with that when comm_open()
717 * also does it. XXX -- adrian
718 */
719 newfd = accept(lptr->fd.fd, (struct sockaddr *)pn, &addrlen);
720 if (newfd < 0)
721 return -1;
722
723 #ifdef IPV6
724 remove_ipv6_mapping(pn);
725 #else
726 pn->ss_len = addrlen;
727 #endif
728
729 execute_callback(setup_socket_cb, newfd);
730
731 /* .. and return */
732 return newfd;
733 }
734
735 /*
736 * remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address
737 * OSes with IPv6 mapping listening on both
738 * AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures
739 *
740 */
741 #ifdef IPV6
742 void
743 remove_ipv6_mapping(struct irc_ssaddr *addr)
744 {
745 if (addr->ss.ss_family == AF_INET6)
746 {
747 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr))
748 {
749 struct sockaddr_in6 v6;
750 struct sockaddr_in *v4 = (struct sockaddr_in *)addr;
751
752 memcpy(&v6, addr, sizeof(v6));
753 memset(v4, 0, sizeof(struct sockaddr_in));
754 memcpy(&v4->sin_addr, &v6.sin6_addr.s6_addr[12], sizeof(v4->sin_addr));
755
756 addr->ss.ss_family = AF_INET;
757 addr->ss_len = sizeof(struct sockaddr_in);
758 }
759 else
760 addr->ss_len = sizeof(struct sockaddr_in6);
761 }
762 else
763 addr->ss_len = sizeof(struct sockaddr_in);
764 }
765 #endif

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svn:eol-style native
svn:keywords Id Revision

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