ViewVC Help
View File | Revision Log | Show Annotations | View Changeset | Root Listing
root/svn/ircd-hybrid/trunk/src/s_bsd.c
Revision: 1247
Committed: Sat Oct 1 07:54:24 2011 UTC (13 years, 10 months ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid-8/src/s_bsd.c
File size: 21615 byte(s)
Log Message:
- Rewrite and cleanup half-broken logging subsystem.
  Logfile rotating is not working yet

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 "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 "s_conf.h"
44 #include "s_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 if (HasServlink(client_p))
250 {
251 if (client_p->localClient->ctrlfd.flags.open)
252 fd_close(&client_p->localClient->ctrlfd);
253 }
254
255 dbuf_clear(&client_p->localClient->buf_sendq);
256 dbuf_clear(&client_p->localClient->buf_recvq);
257
258 MyFree(client_p->localClient->passwd);
259 detach_conf(client_p, CONF_TYPE);
260 client_p->from = NULL; /* ...this should catch them! >:) --msa */
261 }
262
263 #ifdef HAVE_LIBCRYPTO
264 /*
265 * ssl_handshake - let OpenSSL initialize the protocol. Register for
266 * read/write events if necessary.
267 */
268 static void
269 ssl_handshake(int fd, struct Client *client_p)
270 {
271 int ret = SSL_accept(client_p->localClient->fd.ssl);
272
273 if (ret <= 0)
274 switch (SSL_get_error(client_p->localClient->fd.ssl, ret))
275 {
276 case SSL_ERROR_WANT_WRITE:
277 comm_setselect(&client_p->localClient->fd, COMM_SELECT_WRITE,
278 (PF *) ssl_handshake, client_p, 0);
279 return;
280
281 case SSL_ERROR_WANT_READ:
282 comm_setselect(&client_p->localClient->fd, COMM_SELECT_READ,
283 (PF *) ssl_handshake, client_p, 0);
284 return;
285
286 default:
287 exit_client(client_p, client_p, "Error during SSL handshake");
288 return;
289 }
290
291 execute_callback(auth_cb, client_p);
292 }
293 #endif
294
295 /*
296 * add_connection - creates a client which has just connected to us on
297 * the given fd. The sockhost field is initialized with the ip# of the host.
298 * An unique id is calculated now, in case it is needed for auth.
299 * The client is sent to the auth module for verification, and not put in
300 * any client list yet.
301 */
302 void
303 add_connection(struct Listener *listener, struct irc_ssaddr *irn, int fd)
304 {
305 struct Client *new_client = make_client(NULL);
306
307 fd_open(&new_client->localClient->fd, fd, 1,
308 (listener->flags & LISTENER_SSL) ?
309 "Incoming SSL connection" : "Incoming connection");
310
311 /*
312 * copy address to 'sockhost' as a string, copy it to host too
313 * so we have something valid to put into error messages...
314 */
315 memcpy(&new_client->localClient->ip, irn, sizeof(struct irc_ssaddr));
316
317 getnameinfo((struct sockaddr *)&new_client->localClient->ip,
318 new_client->localClient->ip.ss_len, new_client->sockhost,
319 sizeof(new_client->sockhost), NULL, 0, NI_NUMERICHOST);
320 new_client->localClient->aftype = new_client->localClient->ip.ss.ss_family;
321
322 if (new_client->sockhost[0] == ':' && new_client->sockhost[1] == ':')
323 {
324 strlcpy(new_client->host, "0", sizeof(new_client->host));
325 strlcpy(new_client->host+1, new_client->sockhost, sizeof(new_client->host)-1);
326 memmove(new_client->sockhost+1, new_client->sockhost, sizeof(new_client->sockhost)-1);
327 new_client->sockhost[0] = '0';
328 }
329 else
330 strlcpy(new_client->host, new_client->sockhost, sizeof(new_client->host));
331
332 new_client->localClient->listener = listener;
333 ++listener->ref_count;
334
335 #ifdef HAVE_LIBCRYPTO
336 if (listener->flags & LISTENER_SSL)
337 {
338 if ((new_client->localClient->fd.ssl = SSL_new(ServerInfo.server_ctx)) == NULL)
339 {
340 ilog(LOG_TYPE_IRCD, "SSL_new() ERROR! -- %s",
341 ERR_error_string(ERR_get_error(), NULL));
342
343 SetDead(new_client);
344 exit_client(new_client, new_client, "SSL_new failed");
345 return;
346 }
347
348 SSL_set_fd(new_client->localClient->fd.ssl, fd);
349 ssl_handshake(0, new_client);
350 }
351 else
352 #endif
353 execute_callback(auth_cb, new_client);
354 }
355
356 /*
357 * stolen from squid - its a neat (but overused! :) routine which we
358 * can use to see whether we can ignore this errno or not. It is
359 * generally useful for non-blocking network IO related errnos.
360 * -- adrian
361 */
362 int
363 ignoreErrno(int ierrno)
364 {
365 switch (ierrno)
366 {
367 case EINPROGRESS:
368 case EWOULDBLOCK:
369 #if EAGAIN != EWOULDBLOCK
370 case EAGAIN:
371 #endif
372 case EALREADY:
373 case EINTR:
374 #ifdef ERESTART
375 case ERESTART:
376 #endif
377 return 1;
378 default:
379 return 0;
380 }
381 }
382
383 /*
384 * comm_settimeout() - set the socket timeout
385 *
386 * Set the timeout for the fd
387 */
388 void
389 comm_settimeout(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
390 {
391 assert(fd->flags.open);
392
393 fd->timeout = CurrentTime + (timeout / 1000);
394 fd->timeout_handler = callback;
395 fd->timeout_data = cbdata;
396 }
397
398 /*
399 * comm_setflush() - set a flush function
400 *
401 * A flush function is simply a function called if found during
402 * comm_timeouts(). Its basically a second timeout, except in this case
403 * I'm too lazy to implement multiple timeout functions! :-)
404 * its kinda nice to have it separate, since this is designed for
405 * flush functions, and when comm_close() is implemented correctly
406 * with close functions, we _actually_ don't call comm_close() here ..
407 * -- originally Adrian's notes
408 * comm_close() is replaced with fd_close() in fdlist.c
409 */
410 void
411 comm_setflush(fde_t *fd, time_t timeout, PF *callback, void *cbdata)
412 {
413 assert(fd->flags.open);
414
415 fd->flush_timeout = CurrentTime + (timeout / 1000);
416 fd->flush_handler = callback;
417 fd->flush_data = cbdata;
418 }
419
420 /*
421 * comm_checktimeouts() - check the socket timeouts
422 *
423 * All this routine does is call the given callback/cbdata, without closing
424 * down the file descriptor. When close handlers have been implemented,
425 * this will happen.
426 */
427 void
428 comm_checktimeouts(void *notused)
429 {
430 int i;
431 fde_t *F;
432 PF *hdl;
433 void *data;
434
435 for (i = 0; i < FD_HASH_SIZE; i++)
436 for (F = fd_hash[i]; F != NULL; F = fd_next_in_loop)
437 {
438 assert(F->flags.open);
439 fd_next_in_loop = F->hnext;
440
441 /* check flush functions */
442 if (F->flush_handler && F->flush_timeout > 0 &&
443 F->flush_timeout < CurrentTime)
444 {
445 hdl = F->flush_handler;
446 data = F->flush_data;
447 comm_setflush(F, 0, NULL, NULL);
448 hdl(F, data);
449 }
450
451 /* check timeouts */
452 if (F->timeout_handler && F->timeout > 0 &&
453 F->timeout < CurrentTime)
454 {
455 /* Call timeout handler */
456 hdl = F->timeout_handler;
457 data = F->timeout_data;
458 comm_settimeout(F, 0, NULL, NULL);
459 hdl(F, data);
460 }
461 }
462 }
463
464 /*
465 * void comm_connect_tcp(int fd, const char *host, unsigned short port,
466 * struct sockaddr *clocal, int socklen,
467 * CNCB *callback, void *data, int aftype, int timeout)
468 * Input: An fd to connect with, a host and port to connect to,
469 * a local sockaddr to connect from + length(or NULL to use the
470 * default), a callback, the data to pass into the callback, the
471 * address family.
472 * Output: None.
473 * Side-effects: A non-blocking connection to the host is started, and
474 * if necessary, set up for selection. The callback given
475 * may be called now, or it may be called later.
476 */
477 void
478 comm_connect_tcp(fde_t *fd, const char *host, unsigned short port,
479 struct sockaddr *clocal, int socklen, CNCB *callback,
480 void *data, int aftype, int timeout)
481 {
482 struct addrinfo hints, *res;
483 char portname[PORTNAMELEN + 1];
484
485 assert(callback);
486 fd->connect.callback = callback;
487 fd->connect.data = data;
488
489 fd->connect.hostaddr.ss.ss_family = aftype;
490 fd->connect.hostaddr.ss_port = htons(port);
491
492 /* Note that we're using a passed sockaddr here. This is because
493 * generally you'll be bind()ing to a sockaddr grabbed from
494 * getsockname(), so this makes things easier.
495 * XXX If NULL is passed as local, we should later on bind() to the
496 * virtual host IP, for completeness.
497 * -- adrian
498 */
499 if ((clocal != NULL) && (bind(fd->fd, clocal, socklen) < 0))
500 {
501 /* Failure, call the callback with COMM_ERR_BIND */
502 comm_connect_callback(fd, COMM_ERR_BIND);
503 /* ... and quit */
504 return;
505 }
506
507 /* Next, if we have been given an IP, get the addr and skip the
508 * DNS check (and head direct to comm_connect_tryconnect().
509 */
510 memset(&hints, 0, sizeof(hints));
511 hints.ai_family = AF_UNSPEC;
512 hints.ai_socktype = SOCK_STREAM;
513 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
514
515 snprintf(portname, sizeof(portname), "%d", port);
516
517 if (getaddrinfo(host, portname, &hints, &res))
518 {
519 /* Send the DNS request, for the next level */
520 if (aftype == AF_INET6)
521 gethost_byname_type(comm_connect_dns_callback, fd, host, T_AAAA);
522 else
523 gethost_byname_type(comm_connect_dns_callback, fd, host, T_A);
524 }
525 else
526 {
527 /* We have a valid IP, so we just call tryconnect */
528 /* Make sure we actually set the timeout here .. */
529 assert(res != NULL);
530 memcpy(&fd->connect.hostaddr, res->ai_addr, res->ai_addrlen);
531 fd->connect.hostaddr.ss_len = res->ai_addrlen;
532 fd->connect.hostaddr.ss.ss_family = res->ai_family;
533 freeaddrinfo(res);
534 comm_settimeout(fd, timeout*1000, comm_connect_timeout, NULL);
535 comm_connect_tryconnect(fd, NULL);
536 }
537 }
538
539 /*
540 * comm_connect_callback() - call the callback, and continue with life
541 */
542 static void
543 comm_connect_callback(fde_t *fd, int status)
544 {
545 CNCB *hdl;
546
547 /* This check is gross..but probably necessary */
548 if (fd->connect.callback == NULL)
549 return;
550
551 /* Clear the connect flag + handler */
552 hdl = fd->connect.callback;
553 fd->connect.callback = NULL;
554
555 /* Clear the timeout handler */
556 comm_settimeout(fd, 0, NULL, NULL);
557
558 /* Call the handler */
559 hdl(fd, status, fd->connect.data);
560 }
561
562 /*
563 * comm_connect_timeout() - this gets called when the socket connection
564 * times out. This *only* can be called once connect() is initially
565 * called ..
566 */
567 static void
568 comm_connect_timeout(fde_t *fd, void *notused)
569 {
570 /* error! */
571 comm_connect_callback(fd, COMM_ERR_TIMEOUT);
572 }
573
574 /*
575 * comm_connect_dns_callback() - called at the completion of the DNS request
576 *
577 * The DNS request has completed, so if we've got an error, return it,
578 * otherwise we initiate the connect()
579 */
580 static void
581 comm_connect_dns_callback(void *vptr, const struct irc_ssaddr *addr, const char *name)
582 {
583 fde_t *F = vptr;
584
585 if (name == NULL)
586 {
587 comm_connect_callback(F, COMM_ERR_DNS);
588 return;
589 }
590
591 /* No error, set a 10 second timeout */
592 comm_settimeout(F, 30*1000, comm_connect_timeout, NULL);
593
594 /* Copy over the DNS reply info so we can use it in the connect() */
595 /*
596 * Note we don't fudge the refcount here, because we aren't keeping
597 * the DNS record around, and the DNS cache is gone anyway..
598 * -- adrian
599 */
600 memcpy(&F->connect.hostaddr, addr, addr->ss_len);
601 /* The cast is hacky, but safe - port offset is same on v4 and v6 */
602 ((struct sockaddr_in *) &F->connect.hostaddr)->sin_port =
603 F->connect.hostaddr.ss_port;
604 F->connect.hostaddr.ss_len = addr->ss_len;
605
606 /* Now, call the tryconnect() routine to try a connect() */
607 comm_connect_tryconnect(F, NULL);
608 }
609
610 /* static void comm_connect_tryconnect(int fd, void *notused)
611 * Input: The fd, the handler data(unused).
612 * Output: None.
613 * Side-effects: Try and connect with pending connect data for the FD. If
614 * we succeed or get a fatal error, call the callback.
615 * Otherwise, it is still blocking or something, so register
616 * to select for a write event on this FD.
617 */
618 static void
619 comm_connect_tryconnect(fde_t *fd, void *notused)
620 {
621 int retval;
622
623 /* This check is needed or re-entrant s_bsd_* like sigio break it. */
624 if (fd->connect.callback == NULL)
625 return;
626
627 /* Try the connect() */
628 retval = connect(fd->fd, (struct sockaddr *) &fd->connect.hostaddr,
629 fd->connect.hostaddr.ss_len);
630
631 /* Error? */
632 if (retval < 0)
633 {
634 /*
635 * If we get EISCONN, then we've already connect()ed the socket,
636 * which is a good thing.
637 * -- adrian
638 */
639 if (errno == EISCONN)
640 comm_connect_callback(fd, COMM_OK);
641 else if (ignoreErrno(errno))
642 /* Ignore error? Reschedule */
643 comm_setselect(fd, COMM_SELECT_WRITE, comm_connect_tryconnect,
644 NULL, 0);
645 else
646 /* Error? Fail with COMM_ERR_CONNECT */
647 comm_connect_callback(fd, COMM_ERR_CONNECT);
648 return;
649 }
650
651 /* If we get here, we've suceeded, so call with COMM_OK */
652 comm_connect_callback(fd, COMM_OK);
653 }
654
655 /*
656 * comm_errorstr() - return an error string for the given error condition
657 */
658 const char *
659 comm_errstr(int error)
660 {
661 if (error < 0 || error >= COMM_ERR_MAX)
662 return "Invalid error number!";
663 return comm_err_str[error];
664 }
665
666 /*
667 * comm_open() - open a socket
668 *
669 * This is a highly highly cut down version of squid's comm_open() which
670 * for the most part emulates socket(), *EXCEPT* it fails if we're about
671 * to run out of file descriptors.
672 */
673 int
674 comm_open(fde_t *F, int family, int sock_type, int proto, const char *note)
675 {
676 int fd;
677
678 /* First, make sure we aren't going to run out of file descriptors */
679 if (number_fd >= hard_fdlimit)
680 {
681 errno = ENFILE;
682 return -1;
683 }
684
685 /*
686 * Next, we try to open the socket. We *should* drop the reserved FD
687 * limit if/when we get an error, but we can deal with that later.
688 * XXX !!! -- adrian
689 */
690 fd = socket(family, sock_type, proto);
691 if (fd < 0)
692 return -1; /* errno will be passed through, yay.. */
693
694 execute_callback(setup_socket_cb, fd);
695
696 /* update things in our fd tracking */
697 fd_open(F, fd, 1, note);
698 return 0;
699 }
700
701 /*
702 * comm_accept() - accept an incoming connection
703 *
704 * This is a simple wrapper for accept() which enforces FD limits like
705 * comm_open() does. Returned fd must be either closed or tagged with
706 * fd_open (this function no longer does it).
707 */
708 int
709 comm_accept(struct Listener *lptr, struct irc_ssaddr *pn)
710 {
711 int newfd;
712 socklen_t addrlen = sizeof(struct irc_ssaddr);
713
714 if (number_fd >= hard_fdlimit)
715 {
716 errno = ENFILE;
717 return -1;
718 }
719
720 /*
721 * Next, do the accept(). if we get an error, we should drop the
722 * reserved fd limit, but we can deal with that when comm_open()
723 * also does it. XXX -- adrian
724 */
725 newfd = accept(lptr->fd.fd, (struct sockaddr *)pn, &addrlen);
726 if (newfd < 0)
727 return -1;
728
729 #ifdef IPV6
730 remove_ipv6_mapping(pn);
731 #else
732 pn->ss_len = addrlen;
733 #endif
734
735 execute_callback(setup_socket_cb, newfd);
736
737 /* .. and return */
738 return newfd;
739 }
740
741 /*
742 * remove_ipv6_mapping() - Removes IPv4-In-IPv6 mapping from an address
743 * OSes with IPv6 mapping listening on both
744 * AF_INET and AF_INET6 map AF_INET connections inside AF_INET6 structures
745 *
746 */
747 #ifdef IPV6
748 void
749 remove_ipv6_mapping(struct irc_ssaddr *addr)
750 {
751 if (addr->ss.ss_family == AF_INET6)
752 {
753 if (IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)addr)->sin6_addr))
754 {
755 struct sockaddr_in6 v6;
756 struct sockaddr_in *v4 = (struct sockaddr_in *)addr;
757
758 memcpy(&v6, addr, sizeof(v6));
759 memset(v4, 0, sizeof(struct sockaddr_in));
760 memcpy(&v4->sin_addr, &v6.sin6_addr.s6_addr[12], sizeof(v4->sin_addr));
761
762 addr->ss.ss_family = AF_INET;
763 addr->ss_len = sizeof(struct sockaddr_in);
764 }
765 else
766 addr->ss_len = sizeof(struct sockaddr_in6);
767 }
768 else
769 addr->ss_len = sizeof(struct sockaddr_in);
770 }
771 #endif

Properties

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