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root/svn/branches/newio/src/s_bsd.c
Revision: 1156
Committed: Tue Aug 9 20:29:20 2011 UTC (12 years, 7 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-8/src/s_bsd.c
File size: 21666 byte(s)
Log Message:
- create ircd-hybrid-8 "branch"

File Contents

# Content
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 "common.h"
34 #include "dbuf.h"
35 #include "event.h"
36 #include "irc_string.h"
37 #include "ircd.h"
38 #include "listener.h"
39 #include "numeric.h"
40 #include "packet.h"
41 #include "irc_res.h"
42 #include "restart.h"
43 #include "s_auth.h"
44 #include "s_conf.h"
45 #include "s_log.h"
46 #include "s_serv.h"
47 #include "send.h"
48 #include "memory.h"
49 #include "s_user.h"
50 #include "hook.h"
51
52 static const char *comm_err_str[] = { "Comm OK", "Error during bind()",
53 "Error during DNS lookup", "connect timeout", "Error during connect()",
54 "Comm Error" };
55
56 struct Callback *setup_socket_cb = NULL;
57
58 static void comm_connect_callback(fde_t *, int);
59 static PF comm_connect_timeout;
60 static void comm_connect_dns_callback(void *, const struct irc_ssaddr *, const char *);
61 static PF comm_connect_tryconnect;
62
63
64 /* check_can_use_v6()
65 * Check if the system can open AF_INET6 sockets
66 */
67 void
68 check_can_use_v6(void)
69 {
70 #ifdef IPV6
71 int v6;
72
73 if ((v6 = socket(AF_INET6, SOCK_STREAM, 0)) < 0)
74 ServerInfo.can_use_v6 = 0;
75 else
76 {
77 ServerInfo.can_use_v6 = 1;
78 close(v6);
79 }
80 #else
81 ServerInfo.can_use_v6 = 0;
82 #endif
83 }
84
85 /* get_sockerr - get the error value from the socket or the current errno
86 *
87 * Get the *real* error from the socket (well try to anyway..).
88 * This may only work when SO_DEBUG is enabled but its worth the
89 * gamble anyway.
90 */
91 int
92 get_sockerr(int fd)
93 {
94 int errtmp = errno;
95 #ifdef SO_ERROR
96 int err = 0;
97 socklen_t len = sizeof(err);
98
99 if (-1 < fd && !getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len))
100 {
101 if (err)
102 errtmp = err;
103 }
104 errno = errtmp;
105 #endif
106 return errtmp;
107 }
108
109 /*
110 * report_error - report an error from an errno.
111 * Record error to log and also send a copy to all *LOCAL* opers online.
112 *
113 * text is a *format* string for outputing error. It must
114 * contain only two '%s', the first will be replaced
115 * by the sockhost from the client_p, and the latter will
116 * be taken from sys_errlist[errno].
117 *
118 * client_p if not NULL, is the *LOCAL* client associated with
119 * the error.
120 *
121 * Cannot use perror() within daemon. stderr is closed in
122 * ircd and cannot be used. And, worse yet, it might have
123 * been reassigned to a normal connection...
124 *
125 * Actually stderr is still there IFF ircd was run with -s --Rodder
126 */
127
128 void
129 report_error(int level, const char* text, const char* who, int error)
130 {
131 who = (who) ? who : "";
132
133 sendto_realops_flags(UMODE_DEBUG, level, text, who, strerror(error));
134 log_oper_action(LOG_IOERR_TYPE, NULL, "%s %s %s\n", who, text, strerror(error));
135 ilog(L_ERROR, text, who, strerror(error));
136 }
137
138 /*
139 * setup_socket()
140 *
141 * Set the socket non-blocking, and other wonderful bits.
142 */
143 static void *
144 setup_socket(va_list args)
145 {
146 int fd = va_arg(args, int);
147 int opt = 1;
148
149 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
150
151 #ifdef IPTOS_LOWDELAY
152 opt = IPTOS_LOWDELAY;
153 setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt));
154 #endif
155
156 fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
157
158 return NULL;
159 }
160
161 /*
162 * init_comm()
163 *
164 * Initializes comm subsystem.
165 */
166 void
167 init_comm(void)
168 {
169 setup_socket_cb = register_callback("setup_socket", setup_socket);
170 init_netio();
171 }
172
173 /*
174 * close_connection
175 * Close the physical connection. This function must make
176 * MyConnect(client_p) == FALSE, and set client_p->from == NULL.
177 */
178 void
179 close_connection(struct Client *client_p)
180 {
181 struct ConfItem *conf;
182 struct AccessItem *aconf;
183 struct ClassItem *aclass;
184
185 assert(NULL != client_p);
186
187 if (!IsDead(client_p))
188 {
189 /* attempt to flush any pending dbufs. Evil, but .. -- adrian */
190 /* there is still a chance that we might send data to this socket
191 * even if it is marked as blocked (COMM_SELECT_READ handler is called
192 * before COMM_SELECT_WRITE). Let's try, nothing to lose.. -adx
193 */
194 ClearSendqBlocked(client_p);
195 send_queued_write(client_p);
196 }
197
198 if (IsClient(client_p))
199 {
200 ++ServerStats.is_cl;
201 ServerStats.is_cbs += client_p->localClient->send.bytes;
202 ServerStats.is_cbr += client_p->localClient->recv.bytes;
203 ServerStats.is_cti += CurrentTime - client_p->firsttime;
204 }
205 else if (IsServer(client_p))
206 {
207 ++ServerStats.is_sv;
208 ServerStats.is_sbs += client_p->localClient->send.bytes;
209 ServerStats.is_sbr += client_p->localClient->recv.bytes;
210 ServerStats.is_sti += CurrentTime - client_p->firsttime;
211
212 /* XXX Does this even make any sense at all anymore?
213 * scheduling a 'quick' reconnect could cause a pile of
214 * nick collides under TSora protocol... -db
215 */
216 /*
217 * If the connection has been up for a long amount of time, schedule
218 * a 'quick' reconnect, else reset the next-connect cycle.
219 */
220 if ((conf = find_conf_exact(SERVER_TYPE, client_p->name,
221 client_p->username, client_p->host)))
222 {
223 /*
224 * Reschedule a faster reconnect, if this was a automatically
225 * connected configuration entry. (Note that if we have had
226 * a rehash in between, the status has been changed to
227 * CONF_ILLEGAL). But only do this if it was a "good" link.
228 */
229 aconf = map_to_conf(conf);
230 aclass = map_to_conf(aconf->class_ptr);
231 aconf->hold = time(NULL);
232 aconf->hold += (aconf->hold - client_p->since > HANGONGOODLINK) ?
233 HANGONRETRYDELAY : ConFreq(aclass);
234 }
235 }
236 else
237 ++ServerStats.is_ni;
238
239 #ifdef HAVE_LIBCRYPTO
240 if (client_p->localClient->fd.ssl)
241 {
242 SSL_set_shutdown(client_p->localClient->fd.ssl, SSL_RECEIVED_SHUTDOWN);
243
244 if (!SSL_shutdown(client_p->localClient->fd.ssl))
245 SSL_shutdown(client_p->localClient->fd.ssl);
246 }
247 #endif
248 if (client_p->localClient->fd.flags.open)
249 fd_close(&client_p->localClient->fd);
250
251 if (HasServlink(client_p))
252 {
253 if (client_p->localClient->ctrlfd.flags.open)
254 fd_close(&client_p->localClient->ctrlfd);
255 }
256
257 dbuf_clear(&client_p->localClient->buf_sendq);
258 dbuf_clear(&client_p->localClient->buf_recvq);
259
260 MyFree(client_p->localClient->passwd);
261 detach_conf(client_p, CONF_TYPE);
262 client_p->from = NULL; /* ...this should catch them! >:) --msa */
263 }
264
265 #ifdef HAVE_LIBCRYPTO
266 /*
267 * ssl_handshake - let OpenSSL initialize the protocol. Register for
268 * read/write events if necessary.
269 */
270 static void
271 ssl_handshake(int fd, struct Client *client_p)
272 {
273 int ret = SSL_accept(client_p->localClient->fd.ssl);
274
275 if (ret <= 0)
276 switch (SSL_get_error(client_p->localClient->fd.ssl, ret))
277 {
278 case SSL_ERROR_WANT_WRITE:
279 comm_setselect(&client_p->localClient->fd, COMM_SELECT_WRITE,
280 (PF *) ssl_handshake, client_p, 0);
281 return;
282
283 case SSL_ERROR_WANT_READ:
284 comm_setselect(&client_p->localClient->fd, COMM_SELECT_READ,
285 (PF *) ssl_handshake, client_p, 0);
286 return;
287
288 default:
289 exit_client(client_p, client_p, "Error during SSL handshake");
290 return;
291 }
292
293 execute_callback(auth_cb, client_p);
294 }
295 #endif
296
297 /*
298 * add_connection - creates a client which has just connected to us on
299 * the given fd. The sockhost field is initialized with the ip# of the host.
300 * An unique id is calculated now, in case it is needed for auth.
301 * The client is sent to the auth module for verification, and not put in
302 * any client list yet.
303 */
304 void
305 add_connection(struct Listener *listener, struct irc_ssaddr *irn, int fd)
306 {
307 struct Client *new_client = make_client(NULL);
308
309 fd_open(&new_client->localClient->fd, fd, 1,
310 (listener->flags & LISTENER_SSL) ?
311 "Incoming SSL connection" : "Incoming connection");
312
313 /*
314 * copy address to 'sockhost' as a string, copy it to host too
315 * so we have something valid to put into error messages...
316 */
317 memcpy(&new_client->localClient->ip, irn, sizeof(struct irc_ssaddr));
318
319 getnameinfo((struct sockaddr *)&new_client->localClient->ip,
320 new_client->localClient->ip.ss_len, new_client->sockhost,
321 sizeof(new_client->sockhost), NULL, 0, NI_NUMERICHOST);
322 new_client->localClient->aftype = new_client->localClient->ip.ss.ss_family;
323
324 if (new_client->sockhost[0] == ':' && new_client->sockhost[1] == ':')
325 {
326 strlcpy(new_client->host, "0", sizeof(new_client->host));
327 strlcpy(new_client->host+1, new_client->sockhost, sizeof(new_client->host)-1);
328 memmove(new_client->sockhost+1, new_client->sockhost, sizeof(new_client->sockhost)-1);
329 new_client->sockhost[0] = '0';
330 }
331 else
332 strlcpy(new_client->host, new_client->sockhost, sizeof(new_client->host));
333
334 new_client->localClient->listener = listener;
335 ++listener->ref_count;
336
337 #ifdef HAVE_LIBCRYPTO
338 if (listener->flags & LISTENER_SSL)
339 {
340 if ((new_client->localClient->fd.ssl = SSL_new(ServerInfo.server_ctx)) == NULL)
341 {
342 ilog(L_CRIT, "SSL_new() ERROR! -- %s",
343 ERR_error_string(ERR_get_error(), NULL));
344
345 SetDead(new_client);
346 exit_client(new_client, new_client, "SSL_new failed");
347 return;
348 }
349
350 SSL_set_fd(new_client->localClient->fd.ssl, fd);
351 ssl_handshake(0, new_client);
352 }
353 else
354 #endif
355 execute_callback(auth_cb, new_client);
356 }
357
358 /*
359 * stolen from squid - its a neat (but overused! :) routine which we
360 * can use to see whether we can ignore this errno or not. It is
361 * generally useful for non-blocking network IO related errnos.
362 * -- adrian
363 */
364 int
365 ignoreErrno(int ierrno)
366 {
367 switch (ierrno)
368 {
369 case EINPROGRESS:
370 case EWOULDBLOCK:
371 #if EAGAIN != EWOULDBLOCK
372 case EAGAIN:
373 #endif
374 case EALREADY:
375 case EINTR:
376 #ifdef ERESTART
377 case ERESTART:
378 #endif
379 return 1;
380 default:
381 return 0;
382 }
383 }
384
385 /*
386 * comm_settimeout() - set the socket timeout
387 *
388 * Set the timeout for the fd
389 */
390 void
391 comm_settimeout(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
392 {
393 assert(fd->flags.open);
394
395 fd->timeout = CurrentTime + (timeout / 1000);
396 fd->timeout_handler = callback;
397 fd->timeout_data = cbdata;
398 }
399
400 /*
401 * comm_setflush() - set a flush function
402 *
403 * A flush function is simply a function called if found during
404 * comm_timeouts(). Its basically a second timeout, except in this case
405 * I'm too lazy to implement multiple timeout functions! :-)
406 * its kinda nice to have it separate, since this is designed for
407 * flush functions, and when comm_close() is implemented correctly
408 * with close functions, we _actually_ don't call comm_close() here ..
409 * -- originally Adrian's notes
410 * comm_close() is replaced with fd_close() in fdlist.c
411 */
412 void
413 comm_setflush(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
414 {
415 assert(fd->flags.open);
416
417 fd->flush_timeout = CurrentTime + (timeout / 1000);
418 fd->flush_handler = callback;
419 fd->flush_data = cbdata;
420 }
421
422 /*
423 * comm_checktimeouts() - check the socket timeouts
424 *
425 * All this routine does is call the given callback/cbdata, without closing
426 * down the file descriptor. When close handlers have been implemented,
427 * this will happen.
428 */
429 void
430 comm_checktimeouts(void *notused)
431 {
432 int i;
433 fde_t *F;
434 PF *hdl;
435 void *data;
436
437 for (i = 0; i < FD_HASH_SIZE; i++)
438 for (F = fd_hash[i]; F != NULL; F = fd_next_in_loop)
439 {
440 assert(F->flags.open);
441 fd_next_in_loop = F->hnext;
442
443 /* check flush functions */
444 if (F->flush_handler && F->flush_timeout > 0 &&
445 F->flush_timeout < CurrentTime)
446 {
447 hdl = F->flush_handler;
448 data = F->flush_data;
449 comm_setflush(F, 0, NULL, NULL);
450 hdl(F, data);
451 }
452
453 /* check timeouts */
454 if (F->timeout_handler && F->timeout > 0 &&
455 F->timeout < CurrentTime)
456 {
457 /* Call timeout handler */
458 hdl = F->timeout_handler;
459 data = F->timeout_data;
460 comm_settimeout(F, 0, NULL, NULL);
461 hdl(F, data);
462 }
463 }
464 }
465
466 /*
467 * void comm_connect_tcp(int fd, const char *host, unsigned short port,
468 * struct sockaddr *clocal, int socklen,
469 * CNCB *callback, void *data, int aftype, int timeout)
470 * Input: An fd to connect with, a host and port to connect to,
471 * a local sockaddr to connect from + length(or NULL to use the
472 * default), a callback, the data to pass into the callback, the
473 * address family.
474 * Output: None.
475 * Side-effects: A non-blocking connection to the host is started, and
476 * if necessary, set up for selection. The callback given
477 * may be called now, or it may be called later.
478 */
479 void
480 comm_connect_tcp(fde_t *fd, const char *host, unsigned short port,
481 struct sockaddr *clocal, int socklen, CNCB *callback,
482 void *data, int aftype, int timeout)
483 {
484 struct addrinfo hints, *res;
485 char portname[PORTNAMELEN + 1];
486
487 assert(callback);
488 fd->connect.callback = callback;
489 fd->connect.data = data;
490
491 fd->connect.hostaddr.ss.ss_family = aftype;
492 fd->connect.hostaddr.ss_port = htons(port);
493
494 /* Note that we're using a passed sockaddr here. This is because
495 * generally you'll be bind()ing to a sockaddr grabbed from
496 * getsockname(), so this makes things easier.
497 * XXX If NULL is passed as local, we should later on bind() to the
498 * virtual host IP, for completeness.
499 * -- adrian
500 */
501 if ((clocal != NULL) && (bind(fd->fd, clocal, socklen) < 0))
502 {
503 /* Failure, call the callback with COMM_ERR_BIND */
504 comm_connect_callback(fd, COMM_ERR_BIND);
505 /* ... and quit */
506 return;
507 }
508
509 /* Next, if we have been given an IP, get the addr and skip the
510 * DNS check (and head direct to comm_connect_tryconnect().
511 */
512 memset(&hints, 0, sizeof(hints));
513 hints.ai_family = AF_UNSPEC;
514 hints.ai_socktype = SOCK_STREAM;
515 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
516
517 snprintf(portname, sizeof(portname), "%d", port);
518
519 if (getaddrinfo(host, portname, &hints, &res))
520 {
521 /* Send the DNS request, for the next level */
522 if (aftype == AF_INET6)
523 gethost_byname_type(comm_connect_dns_callback, fd, host, T_AAAA);
524 else
525 gethost_byname_type(comm_connect_dns_callback, fd, host, T_A);
526 }
527 else
528 {
529 /* We have a valid IP, so we just call tryconnect */
530 /* Make sure we actually set the timeout here .. */
531 assert(res != NULL);
532 memcpy(&fd->connect.hostaddr, res->ai_addr, res->ai_addrlen);
533 fd->connect.hostaddr.ss_len = res->ai_addrlen;
534 fd->connect.hostaddr.ss.ss_family = res->ai_family;
535 freeaddrinfo(res);
536 comm_settimeout(fd, timeout*1000, comm_connect_timeout, NULL);
537 comm_connect_tryconnect(fd, NULL);
538 }
539 }
540
541 /*
542 * comm_connect_callback() - call the callback, and continue with life
543 */
544 static void
545 comm_connect_callback(fde_t *fd, int status)
546 {
547 CNCB *hdl;
548
549 /* This check is gross..but probably necessary */
550 if (fd->connect.callback == NULL)
551 return;
552
553 /* Clear the connect flag + handler */
554 hdl = fd->connect.callback;
555 fd->connect.callback = NULL;
556
557 /* Clear the timeout handler */
558 comm_settimeout(fd, 0, NULL, NULL);
559
560 /* Call the handler */
561 hdl(fd, status, fd->connect.data);
562 }
563
564 /*
565 * comm_connect_timeout() - this gets called when the socket connection
566 * times out. This *only* can be called once connect() is initially
567 * called ..
568 */
569 static void
570 comm_connect_timeout(fde_t *fd, void *notused)
571 {
572 /* error! */
573 comm_connect_callback(fd, COMM_ERR_TIMEOUT);
574 }
575
576 /*
577 * comm_connect_dns_callback() - called at the completion of the DNS request
578 *
579 * The DNS request has completed, so if we've got an error, return it,
580 * otherwise we initiate the connect()
581 */
582 static void
583 comm_connect_dns_callback(void *vptr, const struct irc_ssaddr *addr, const char *name)
584 {
585 fde_t *F = vptr;
586
587 if (name == NULL)
588 {
589 comm_connect_callback(F, COMM_ERR_DNS);
590 return;
591 }
592
593 /* No error, set a 10 second timeout */
594 comm_settimeout(F, 30*1000, comm_connect_timeout, NULL);
595
596 /* Copy over the DNS reply info so we can use it in the connect() */
597 /*
598 * Note we don't fudge the refcount here, because we aren't keeping
599 * the DNS record around, and the DNS cache is gone anyway..
600 * -- adrian
601 */
602 memcpy(&F->connect.hostaddr, addr, addr->ss_len);
603 /* The cast is hacky, but safe - port offset is same on v4 and v6 */
604 ((struct sockaddr_in *) &F->connect.hostaddr)->sin_port =
605 F->connect.hostaddr.ss_port;
606 F->connect.hostaddr.ss_len = addr->ss_len;
607
608 /* Now, call the tryconnect() routine to try a connect() */
609 comm_connect_tryconnect(F, NULL);
610 }
611
612 /* static void comm_connect_tryconnect(int fd, void *notused)
613 * Input: The fd, the handler data(unused).
614 * Output: None.
615 * Side-effects: Try and connect with pending connect data for the FD. If
616 * we succeed or get a fatal error, call the callback.
617 * Otherwise, it is still blocking or something, so register
618 * to select for a write event on this FD.
619 */
620 static void
621 comm_connect_tryconnect(fde_t *fd, void *notused)
622 {
623 int retval;
624
625 /* This check is needed or re-entrant s_bsd_* like sigio break it. */
626 if (fd->connect.callback == NULL)
627 return;
628
629 /* Try the connect() */
630 retval = connect(fd->fd, (struct sockaddr *) &fd->connect.hostaddr,
631 fd->connect.hostaddr.ss_len);
632
633 /* Error? */
634 if (retval < 0)
635 {
636 /*
637 * If we get EISCONN, then we've already connect()ed the socket,
638 * which is a good thing.
639 * -- adrian
640 */
641 if (errno == EISCONN)
642 comm_connect_callback(fd, COMM_OK);
643 else if (ignoreErrno(errno))
644 /* Ignore error? Reschedule */
645 comm_setselect(fd, COMM_SELECT_WRITE, comm_connect_tryconnect,
646 NULL, 0);
647 else
648 /* Error? Fail with COMM_ERR_CONNECT */
649 comm_connect_callback(fd, COMM_ERR_CONNECT);
650 return;
651 }
652
653 /* If we get here, we've suceeded, so call with COMM_OK */
654 comm_connect_callback(fd, COMM_OK);
655 }
656
657 /*
658 * comm_errorstr() - return an error string for the given error condition
659 */
660 const char *
661 comm_errstr(int error)
662 {
663 if (error < 0 || error >= COMM_ERR_MAX)
664 return "Invalid error number!";
665 return comm_err_str[error];
666 }
667
668 /*
669 * comm_open() - open a socket
670 *
671 * This is a highly highly cut down version of squid's comm_open() which
672 * for the most part emulates socket(), *EXCEPT* it fails if we're about
673 * to run out of file descriptors.
674 */
675 int
676 comm_open(fde_t *F, int family, int sock_type, int proto, const char *note)
677 {
678 int fd;
679
680 /* First, make sure we aren't going to run out of file descriptors */
681 if (number_fd >= hard_fdlimit)
682 {
683 errno = ENFILE;
684 return -1;
685 }
686
687 /*
688 * Next, we try to open the socket. We *should* drop the reserved FD
689 * limit if/when we get an error, but we can deal with that later.
690 * XXX !!! -- adrian
691 */
692 fd = socket(family, sock_type, proto);
693 if (fd < 0)
694 return -1; /* errno will be passed through, yay.. */
695
696 execute_callback(setup_socket_cb, fd);
697
698 /* update things in our fd tracking */
699 fd_open(F, fd, 1, note);
700 return 0;
701 }
702
703 /*
704 * comm_accept() - accept an incoming connection
705 *
706 * This is a simple wrapper for accept() which enforces FD limits like
707 * comm_open() does. Returned fd must be either closed or tagged with
708 * fd_open (this function no longer does it).
709 */
710 int
711 comm_accept(struct Listener *lptr, struct irc_ssaddr *pn)
712 {
713 int newfd;
714 socklen_t addrlen = sizeof(struct irc_ssaddr);
715
716 if (number_fd >= hard_fdlimit)
717 {
718 errno = ENFILE;
719 return -1;
720 }
721
722 /*
723 * Next, do the accept(). if we get an error, we should drop the
724 * reserved fd limit, but we can deal with that when comm_open()
725 * also does it. XXX -- adrian
726 */
727 newfd = accept(lptr->fd.fd, (struct sockaddr *)pn, &addrlen);
728 if (newfd < 0)
729 return -1;
730
731 #ifdef IPV6
732 remove_ipv6_mapping(pn);
733 #else
734 pn->ss_len = addrlen;
735 #endif
736
737 execute_callback(setup_socket_cb, newfd);
738
739 /* .. and return */
740 return newfd;
741 }
742
743 /*
744 * remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address
745 * OSes with IPv6 mapping listening on both
746 * AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures
747 *
748 */
749 #ifdef IPV6
750 void
751 remove_ipv6_mapping(struct irc_ssaddr *addr)
752 {
753 if (addr->ss.ss_family == AF_INET6)
754 {
755 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr))
756 {
757 struct sockaddr_in6 v6;
758 struct sockaddr_in *v4 = (struct sockaddr_in *)addr;
759
760 memcpy(&v6, addr, sizeof(v6));
761 memset(v4, 0, sizeof(struct sockaddr_in));
762 memcpy(&v4->sin_addr, &v6.sin6_addr.s6_addr[12], sizeof(v4->sin_addr));
763
764 addr->ss.ss_family = AF_INET;
765 addr->ss_len = sizeof(struct sockaddr_in);
766 }
767 else
768 addr->ss_len = sizeof(struct sockaddr_in6);
769 }
770 else
771 addr->ss_len = sizeof(struct sockaddr_in);
772 }
773 #endif

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision