/[svn]/ircd-hybrid-7.3/src/send.c
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Contents of /ircd-hybrid-7.3/src/send.c

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Revision 1078 - (show annotations)
Sun Mar 7 22:55:05 2010 UTC (10 years, 5 months ago) by michael
File MIME type: text/x-chdr
File size: 32104 byte(s)
- move Client.serial to LocalUser struct

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * send.c: Functions for sending messages.
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 "list.h"
27 #include "send.h"
28 #include "channel.h"
29 #include "client.h"
30 #include "common.h"
31 #include "dbuf.h"
32 #include "irc_string.h"
33 #include "ircd.h"
34 #include "handlers.h"
35 #include "numeric.h"
36 #include "fdlist.h"
37 #include "s_bsd.h"
38 #include "s_serv.h"
39 #include "sprintf_irc.h"
40 #include "s_conf.h"
41 #include "s_log.h"
42 #include "memory.h"
43 #include "hook.h"
44 #include "irc_getnameinfo.h"
45 #include "packet.h"
46
47
48 struct Callback *iosend_cb = NULL;
49 struct Callback *iosendctrl_cb = NULL;
50 static unsigned int current_serial = 0;
51
52
53 /* send_format()
54 *
55 * inputs - buffer to format into
56 * - size of the buffer
57 * - format pattern to use
58 * - var args
59 * output - number of bytes formatted output
60 * side effects - modifies sendbuf
61 */
62 static inline int
63 send_format(char *lsendbuf, int bufsize, const char *pattern, va_list args)
64 {
65 int len;
66
67 /*
68 * from rfc1459
69 *
70 * IRC messages are always lines of characters terminated with a CR-LF
71 * (Carriage Return - Line Feed) pair, and these messages shall not
72 * exceed 512 characters in length, counting all characters
73 * including the trailing CR-LF.
74 * Thus, there are 510 characters maximum allowed
75 * for the command and its parameters. There is no provision for
76 * continuation message lines. See section 7 for more details about
77 * current implementations.
78 */
79 len = vsnprintf(lsendbuf, bufsize - 1, pattern, args);
80 if (len > bufsize - 2)
81 len = bufsize - 2; /* required by some versions of vsnprintf */
82
83 lsendbuf[len++] = '\r';
84 lsendbuf[len++] = '\n';
85 return len;
86 }
87
88 /*
89 * iosend_default - append a packet to the client's sendq.
90 */
91 void *
92 iosend_default(va_list args)
93 {
94 struct Client *to = va_arg(args, struct Client *);
95 int length = va_arg(args, int);
96 char *buf = va_arg(args, char *);
97
98 dbuf_put(&to->localClient->buf_sendq, buf, length);
99 return NULL;
100 }
101
102 /*
103 ** send_message
104 ** Internal utility which appends given buffer to the sockets
105 ** sendq.
106 */
107 static void
108 send_message(struct Client *to, char *buf, int len)
109 {
110 assert(!IsMe(to));
111 assert(to != &me);
112
113 if (dbuf_length(&to->localClient->buf_sendq) + len > get_sendq(to))
114 {
115 if (IsServer(to))
116 sendto_realops_flags(UMODE_ALL, L_ALL,
117 "Max SendQ limit exceeded for %s: %lu > %lu",
118 get_client_name(to, HIDE_IP),
119 (unsigned long)(dbuf_length(&to->localClient->buf_sendq) + len),
120 get_sendq(to));
121 if (IsClient(to))
122 SetSendQExceeded(to);
123 dead_link_on_write(to, 0);
124 return;
125 }
126
127 execute_callback(iosend_cb, to, len, buf);
128
129 /*
130 ** Update statistics. The following is slightly incorrect
131 ** because it counts messages even if queued, but bytes
132 ** only really sent. Queued bytes get updated in SendQueued.
133 */
134 ++to->localClient->send.messages;
135 ++me.localClient->send.messages;
136
137 if (dbuf_length(&to->localClient->buf_sendq) >
138 (IsServer(to) ? (unsigned int) 1024 : (unsigned int) 4096))
139 send_queued_write(to);
140 }
141
142 /* send_message_remote()
143 *
144 * inputs - pointer to client from message is being sent
145 * - pointer to client to send to
146 * - pointer to preformatted buffer
147 * - length of input buffer
148 * output - none
149 * side effects - Despite the function name, this only sends to directly
150 * connected clients.
151 *
152 */
153 static void
154 send_message_remote(struct Client *to, struct Client *from,
155 char *buf, int len)
156 {
157 if (!MyConnect(to))
158 {
159 sendto_realops_flags(UMODE_ALL, L_ALL,
160 "server send message to %s [%s] dropped from %s(Not local server)",
161 to->name, to->from->name, from->name);
162 return;
163 }
164
165 /* Optimize by checking if (from && to) before everything */
166 /* we set to->from up there.. */
167
168 if (!MyClient(from) && IsClient(to) && (to == from->from))
169 {
170 if (IsServer(from))
171 {
172 sendto_realops_flags(UMODE_ALL, L_ALL,
173 "Send message to %s [%s] dropped from %s(Fake Dir)",
174 to->name, to->from->name, from->name);
175 return;
176 }
177
178 sendto_realops_flags(UMODE_ALL, L_ALL,
179 "Ghosted: %s[%s@%s] from %s[%s@%s] (%s)",
180 to->name, to->username, to->host,
181 from->name, from->username, from->host,
182 to->from->name);
183
184 sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
185 ":%s KILL %s :%s (%s[%s@%s] Ghosted %s)",
186 me.id, to->name, me.name, to->name,
187 to->username, to->host, to->from->name);
188 sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
189 ":%s KILL %s :%s (%s[%s@%s] Ghosted %s)",
190 me.name, to->name, me.name, to->name,
191 to->username, to->host, to->from->name);
192
193 SetKilled(to);
194
195 if (IsClient(from))
196 sendto_one(from, form_str(ERR_GHOSTEDCLIENT),
197 me.name, from->name, to->name, to->username,
198 to->host, to->from);
199
200 exit_client(to, &me, "Ghosted client");
201
202 return;
203 }
204
205 send_message(to, buf, len);
206 }
207
208 /*
209 ** sendq_unblocked
210 ** Called when a socket is ready for writing.
211 */
212 void
213 sendq_unblocked(fde_t *fd, struct Client *client_p)
214 {
215 ClearSendqBlocked(client_p);
216 /* let send_queued_write be executed by send_queued_all */
217
218 #ifdef HAVE_LIBCRYPTO
219 if (fd->flags.pending_read)
220 {
221 fd->flags.pending_read = 0;
222 read_packet(fd, client_p);
223 }
224 #endif
225 }
226
227 /*
228 ** slinkq_unblocked
229 ** Called when a server control socket is ready for writing.
230 */
231 static void
232 slinkq_unblocked(fde_t *fd, struct Client *client_p)
233 {
234 ClearSlinkqBlocked(client_p);
235 send_queued_slink_write(client_p);
236 }
237
238 /*
239 ** send_queued_write
240 ** This is called when there is a chance that some output would
241 ** be possible. This attempts to empty the send queue as far as
242 ** possible, and then if any data is left, a write is rescheduled.
243 */
244 void
245 send_queued_write(struct Client *to)
246 {
247 int retlen;
248 struct dbuf_block *first;
249
250 /*
251 ** Once socket is marked dead, we cannot start writing to it,
252 ** even if the error is removed...
253 */
254 if (IsDead(to) || IsSendqBlocked(to))
255 return; /* no use calling send() now */
256
257 /* Next, lets try to write some data */
258
259 if (dbuf_length(&to->localClient->buf_sendq))
260 {
261 do {
262 first = to->localClient->buf_sendq.blocks.head->data;
263
264 #ifdef HAVE_LIBCRYPTO
265 if (to->localClient->fd.ssl)
266 {
267 retlen = SSL_write(to->localClient->fd.ssl, first->data, first->size);
268
269 /* translate openssl error codes, sigh */
270 if (retlen < 0)
271 switch (SSL_get_error(to->localClient->fd.ssl, retlen))
272 {
273 case SSL_ERROR_WANT_READ:
274 return; /* retry later, don't register for write events */
275
276 case SSL_ERROR_WANT_WRITE:
277 errno = EWOULDBLOCK;
278 case SSL_ERROR_SYSCALL:
279 break;
280 case SSL_ERROR_SSL:
281 if (errno == EAGAIN)
282 break;
283 default:
284 retlen = errno = 0; /* either an SSL-specific error or EOF */
285 }
286 }
287 else
288 #endif
289 retlen = send(to->localClient->fd.fd, first->data, first->size, 0);
290
291 if (retlen <= 0)
292 break;
293
294 dbuf_delete(&to->localClient->buf_sendq, retlen);
295
296 /* We have some data written .. update counters */
297 to->localClient->send.bytes += retlen;
298 me.localClient->send.bytes += retlen;
299 } while (dbuf_length(&to->localClient->buf_sendq));
300
301 if ((retlen < 0) && (ignoreErrno(errno)))
302 {
303 /* we have a non-fatal error, reschedule a write */
304 SetSendqBlocked(to);
305 comm_setselect(&to->localClient->fd, COMM_SELECT_WRITE,
306 (PF *)sendq_unblocked, (void *)to, 0);
307 }
308 else if (retlen <= 0)
309 {
310 dead_link_on_write(to, errno);
311 return;
312 }
313 }
314 }
315
316 /*
317 ** send_queued_slink_write
318 ** This is called when there is a chance the some output would
319 ** be possible. This attempts to empty the send queue as far as
320 ** possible, and then if any data is left, a write is rescheduled.
321 */
322 void
323 send_queued_slink_write(struct Client *to)
324 {
325 int retlen;
326
327 /*
328 ** Once socket is marked dead, we cannot start writing to it,
329 ** even if the error is removed...
330 */
331 if (IsDead(to) || IsSlinkqBlocked(to))
332 return; /* no use calling send() now */
333
334 /* Next, lets try to write some data */
335 if (to->localClient->slinkq != NULL)
336 {
337 retlen = send(to->localClient->ctrlfd.fd,
338 to->localClient->slinkq + to->localClient->slinkq_ofs,
339 to->localClient->slinkq_len, 0);
340 if (retlen < 0)
341 {
342 /* If we have a fatal error */
343 if (!ignoreErrno(errno))
344 {
345 dead_link_on_write(to, errno);
346 return;
347 }
348 }
349 else if (retlen == 0)
350 {
351 /* 0 bytes is an EOF .. */
352 dead_link_on_write(to, 0);
353 return;
354 }
355 else
356 {
357 execute_callback(iosendctrl_cb, to, retlen,
358 to->localClient->slinkq + to->localClient->slinkq_ofs);
359 to->localClient->slinkq_len -= retlen;
360
361 assert(to->localClient->slinkq_len >= 0);
362 if (to->localClient->slinkq_len)
363 to->localClient->slinkq_ofs += retlen;
364 else
365 {
366 to->localClient->slinkq_ofs = 0;
367 MyFree(to->localClient->slinkq);
368 to->localClient->slinkq = NULL;
369 }
370 }
371
372 /* Finally, if we have any more data, reschedule a write */
373 if (to->localClient->slinkq_len)
374 {
375 SetSlinkqBlocked(to);
376 comm_setselect(&to->localClient->ctrlfd, COMM_SELECT_WRITE,
377 (PF *)slinkq_unblocked, (void *)to, 0);
378 }
379 }
380 }
381
382 /* send_queued_all()
383 *
384 * input - NONE
385 * output - NONE
386 * side effects - try to flush sendq of each client
387 */
388 void
389 send_queued_all(void)
390 {
391 dlink_node *ptr;
392
393 /* Servers are processed first, mainly because this can generate
394 * a notice to opers, which is to be delivered by this function.
395 */
396 DLINK_FOREACH(ptr, serv_list.head)
397 send_queued_write((struct Client *) ptr->data);
398
399 DLINK_FOREACH(ptr, unknown_list.head)
400 send_queued_write((struct Client *) ptr->data);
401
402 DLINK_FOREACH(ptr, local_client_list.head)
403 send_queued_write((struct Client *) ptr->data);
404
405 /* NOTE: This can still put clients on aborted_list; unfortunately,
406 * exit_aborted_clients takes precedence over send_queued_all,
407 * because exiting clients can generate server/oper traffic.
408 * The easiest approach is dealing with aborted clients in the next I/O lap.
409 * -adx
410 */
411 }
412
413 /* sendto_one()
414 *
415 * inputs - pointer to destination client
416 * - var args message
417 * output - NONE
418 * side effects - send message to single client
419 */
420 void
421 sendto_one(struct Client *to, const char *pattern, ...)
422 {
423 va_list args;
424 char buffer[IRCD_BUFSIZE];
425 int len;
426
427 if (to->from != NULL)
428 to = to->from;
429 if (IsDead(to))
430 return; /* This socket has already been marked as dead */
431
432 va_start(args, pattern);
433 len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
434 va_end(args);
435
436 send_message(to, buffer, len);
437 }
438
439 /* sendto_channel_butone()
440 *
441 * inputs - pointer to client(server) to NOT send message to
442 * - pointer to client that is sending this message
443 * - pointer to channel being sent to
444 * - vargs message
445 * output - NONE
446 * side effects - message as given is sent to given channel members.
447 *
448 * WARNING - +D clients are ignored
449 */
450 void
451 sendto_channel_butone(struct Client *one, struct Client *from,
452 struct Channel *chptr, const char *command,
453 const char *pattern, ...)
454 {
455 va_list alocal, aremote, auid;
456 char local_buf[IRCD_BUFSIZE];
457 char remote_buf[IRCD_BUFSIZE];
458 char uid_buf[IRCD_BUFSIZE];
459 int local_len, remote_len, uid_len;
460 dlink_node *ptr = NULL, *ptr_next = NULL;
461
462 if (IsServer(from))
463 local_len = ircsprintf(local_buf, ":%s %s %s ",
464 from->name, command, chptr->chname);
465 else
466 local_len = ircsprintf(local_buf, ":%s!%s@%s %s %s ",
467 from->name, from->username, from->host,
468 command, chptr->chname);
469 remote_len = ircsprintf(remote_buf, ":%s %s %s ",
470 from->name, command, chptr->chname);
471 uid_len = ircsprintf(uid_buf, ":%s %s %s ",
472 ID(from), command, chptr->chname);
473
474 va_start(alocal, pattern);
475 va_start(aremote, pattern);
476 va_start(auid, pattern);
477 local_len += send_format(&local_buf[local_len], IRCD_BUFSIZE - local_len,
478 pattern, alocal);
479 remote_len += send_format(&remote_buf[remote_len], IRCD_BUFSIZE - remote_len,
480 pattern, aremote);
481 uid_len += send_format(&uid_buf[uid_len], IRCD_BUFSIZE - uid_len, pattern,
482 auid);
483 va_end(auid);
484 va_end(aremote);
485 va_end(alocal);
486
487 ++current_serial;
488
489 DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
490 {
491 struct Client *target_p = ((struct Membership *)ptr->data)->client_p;
492
493 assert(IsClient(target_p));
494
495 if (IsDefunct(target_p) || IsDeaf(target_p) || target_p->from == one)
496 continue;
497
498 if (MyConnect(target_p))
499 {
500 if (target_p->localClient->serial != current_serial)
501 {
502 send_message(target_p, local_buf, local_len);
503 target_p->localClient->serial = current_serial;
504 }
505 }
506 else
507 {
508 /* Now check whether a message has been sent to this
509 * remote link already
510 */
511 if (target_p->from->localClient->serial != current_serial)
512 {
513 if (IsCapable(target_p->from, CAP_TS6))
514 send_message_remote(target_p->from, from, uid_buf, uid_len);
515 else
516 send_message_remote(target_p->from, from, remote_buf, remote_len);
517 target_p->from->localClient->serial = current_serial;
518 }
519 }
520 }
521 }
522
523 /* sendto_server()
524 *
525 * inputs - pointer to client to NOT send to
526 * - pointer to channel
527 * - caps or'd together which must ALL be present
528 * - caps or'd together which must ALL NOT be present
529 * - printf style format string
530 * - args to format string
531 * output - NONE
532 * side effects - Send a message to all connected servers, except the
533 * client 'one' (if non-NULL), as long as the servers
534 * support ALL capabs in 'caps', and NO capabs in 'nocaps'.
535 *
536 * This function was written in an attempt to merge together the other
537 * billion sendto_*serv*() functions, which sprung up with capabs,
538 * lazylinks, uids, etc.
539 * -davidt
540 */
541 void
542 sendto_server(struct Client *one, const struct Channel *chptr,
543 const unsigned int caps,
544 const unsigned int nocaps,
545 const char *format, ...)
546 {
547 va_list args;
548 dlink_node *ptr = NULL;
549 char buffer[IRCD_BUFSIZE];
550 int len = 0;
551
552 if (chptr && chptr->chname[0] != '#')
553 return;
554
555 va_start(args, format);
556 len = send_format(buffer, IRCD_BUFSIZE, format, args);
557 va_end(args);
558
559 DLINK_FOREACH(ptr, serv_list.head)
560 {
561 struct Client *client_p = ptr->data;
562
563 /* If dead already skip */
564 if (IsDead(client_p))
565 continue;
566 /* check against 'one' */
567 if (one != NULL && (client_p == one->from))
568 continue;
569 /* check we have required capabs */
570 if ((client_p->localClient->caps & caps) != caps)
571 continue;
572 /* check we don't have any forbidden capabs */
573 if ((client_p->localClient->caps & nocaps) != 0)
574 continue;
575
576 send_message(client_p, buffer, len);
577 }
578 }
579
580 /* sendto_common_channels_local()
581 *
582 * inputs - pointer to client
583 * - pattern to send
584 * output - NONE
585 * side effects - Sends a message to all people on local server who are
586 * in same channel with user.
587 * used by m_nick.c and exit_one_client.
588 */
589 void
590 sendto_common_channels_local(struct Client *user, int touser,
591 const char *pattern, ...)
592 {
593 va_list args;
594 dlink_node *uptr;
595 dlink_node *cptr;
596 struct Channel *chptr;
597 struct Membership *ms;
598 struct Client *target_p;
599 char buffer[IRCD_BUFSIZE];
600 int len;
601
602 va_start(args, pattern);
603 len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
604 va_end(args);
605
606 ++current_serial;
607
608 DLINK_FOREACH(cptr, user->channel.head)
609 {
610 chptr = ((struct Membership *) cptr->data)->chptr;
611 assert(chptr != NULL);
612
613 DLINK_FOREACH(uptr, chptr->members.head)
614 {
615 ms = uptr->data;
616 target_p = ms->client_p;
617 assert(target_p != NULL);
618
619 if (!MyConnect(target_p) || target_p == user || IsDefunct(target_p) ||
620 target_p->localClient->serial == current_serial)
621 continue;
622
623 target_p->localClient->serial = current_serial;
624 send_message(target_p, buffer, len);
625 }
626 }
627
628 if (touser && MyConnect(user) && !IsDead(user) &&
629 user->localClient->serial != current_serial)
630 send_message(user, buffer, len);
631 }
632
633 /* sendto_channel_local()
634 *
635 * inputs - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
636 * - whether to ignore +D clients (YES/NO)
637 * - pointer to channel to send to
638 * - var args pattern
639 * output - NONE
640 * side effects - Send a message to all members of a channel that are
641 * locally connected to this server.
642 */
643 void
644 sendto_channel_local(int type, int nodeaf, struct Channel *chptr,
645 const char *pattern, ...)
646 {
647 va_list args;
648 char buffer[IRCD_BUFSIZE];
649 int len;
650 dlink_node *ptr;
651 struct Membership *ms;
652 struct Client *target_p;
653
654 va_start(args, pattern);
655 len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
656 va_end(args);
657
658 DLINK_FOREACH(ptr, chptr->members.head)
659 {
660 ms = ptr->data;
661 target_p = ms->client_p;
662
663 if (type != 0 && (ms->flags & type) == 0)
664 continue;
665
666 if (!MyConnect(target_p) || IsDefunct(target_p) ||
667 (nodeaf && IsDeaf(target_p)))
668 continue;
669
670 send_message(target_p, buffer, len);
671 }
672 }
673
674 /* sendto_channel_local_butone()
675 *
676 * inputs - pointer to client to NOT send message to
677 * - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
678 * - pointer to channel to send to
679 * - var args pattern
680 * output - NONE
681 * side effects - Send a message to all members of a channel that are
682 * locally connected to this server except one.
683 *
684 * WARNING - +D clients are omitted
685 */
686 void
687 sendto_channel_local_butone(struct Client *one, int type,
688 struct Channel *chptr, const char *pattern, ...)
689 {
690 va_list args;
691 char buffer[IRCD_BUFSIZE];
692 int len;
693 struct Client *target_p;
694 struct Membership *ms;
695 dlink_node *ptr;
696
697 va_start(args, pattern);
698 len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
699 va_end(args);
700
701 DLINK_FOREACH(ptr, chptr->members.head)
702 {
703 ms = ptr->data;
704 target_p = ms->client_p;
705
706 if (type != 0 && (ms->flags & type) == 0)
707 continue;
708
709 if (!MyConnect(target_p) || target_p == one ||
710 IsDefunct(target_p) || IsDeaf(target_p))
711 continue;
712 send_message(target_p, buffer, len);
713 }
714 }
715
716
717 /* sendto_channel_remote()
718 *
719 * inputs - Client not to send towards
720 * - Client from whom message is from
721 * - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
722 * - pointer to channel to send to
723 * - var args pattern
724 * output - NONE
725 * side effects - Send a message to all members of a channel that are
726 * remote to this server.
727 */
728 void
729 sendto_channel_remote(struct Client *one, struct Client *from, int type,
730 const unsigned int caps, const unsigned int nocaps,
731 struct Channel *chptr, const char *pattern, ...)
732 {
733 va_list args;
734 char buffer[IRCD_BUFSIZE];
735 int len;
736 dlink_node *ptr;
737 struct Client *target_p;
738 struct Membership *ms;
739
740 va_start(args, pattern);
741 len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
742 va_end(args);
743
744 ++current_serial;
745
746 DLINK_FOREACH(ptr, chptr->members.head)
747 {
748 ms = ptr->data;
749 target_p = ms->client_p;
750
751 if (type != 0 && (ms->flags & type) == 0)
752 continue;
753
754 if (MyConnect(target_p))
755 continue;
756 target_p = target_p->from;
757
758 if (target_p == one->from ||
759 ((target_p->from->localClient->caps & caps) != caps) ||
760 ((target_p->from->localClient->caps & nocaps) != 0))
761 continue;
762 if (target_p->from->localClient->serial != current_serial)
763 {
764 send_message(target_p, buffer, len);
765 target_p->from->localClient->serial = current_serial;
766 }
767 }
768 }
769
770 /*
771 ** match_it() and sendto_match_butone() ARE only used
772 ** to send a msg to all ppl on servers/hosts that match a specified mask
773 ** (used for enhanced PRIVMSGs) for opers
774 **
775 ** addition -- Armin, 8jun90 (gruner@informatik.tu-muenchen.de)
776 **
777 */
778
779 /* match_it()
780 *
781 * inputs - client pointer to match on
782 * - actual mask to match
783 * - what to match on, HOST or SERVER
784 * output - 1 or 0 if match or not
785 * side effects - NONE
786 */
787 static int
788 match_it(const struct Client *one, const char *mask, int what)
789 {
790 if (what == MATCH_HOST)
791 return match(mask, one->host);
792
793 return match(mask, one->servptr->name);
794 }
795
796 /* sendto_match_butone()
797 *
798 * Send to all clients which match the mask in a way defined on 'what';
799 * either by user hostname or user servername.
800 *
801 * ugh. ONLY used by m_message.c to send an "oper magic" message. ugh.
802 */
803 void
804 sendto_match_butone(struct Client *one, struct Client *from, char *mask,
805 int what, const char *pattern, ...)
806 {
807 va_list alocal, aremote;
808 struct Client *client_p;
809 dlink_node *ptr, *ptr_next;
810 char local_buf[IRCD_BUFSIZE], remote_buf[IRCD_BUFSIZE];
811 int local_len = ircsprintf(local_buf, ":%s!%s@%s ", from->name,
812 from->username, from->host);
813 int remote_len = ircsprintf(remote_buf, ":%s ", from->name);
814
815 va_start(alocal, pattern);
816 va_start(aremote, pattern);
817 local_len += send_format(&local_buf[local_len], IRCD_BUFSIZE - local_len,
818 pattern, alocal);
819 remote_len += send_format(&remote_buf[remote_len], IRCD_BUFSIZE - remote_len,
820 pattern, aremote);
821 va_end(aremote);
822 va_end(alocal);
823
824 /* scan the local clients */
825 DLINK_FOREACH(ptr, local_client_list.head)
826 {
827 client_p = ptr->data;
828
829 if (client_p != one && !IsDefunct(client_p) &&
830 match_it(client_p, mask, what))
831 send_message(client_p, local_buf, local_len);
832 }
833
834 /* Now scan servers */
835 DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head)
836 {
837 client_p = ptr->data;
838
839 /*
840 * The old code looped through every client on the
841 * network for each server to check if the
842 * server (client_p) has at least 1 client matching
843 * the mask, using something like:
844 *
845 * for (target_p = GlobalClientList; target_p; target_p = target_p->next)
846 * if (IsRegisteredUser(target_p) &&
847 * match_it(target_p, mask, what) &&
848 * (target_p->from == client_p))
849 * vsendto_prefix_one(client_p, from, pattern, args);
850 *
851 * That way, we wouldn't send the message to
852 * a server who didn't have a matching client.
853 * However, on a network such as EFNet, that
854 * code would have looped through about 50
855 * servers, and in each loop, loop through
856 * about 50k clients as well, calling match()
857 * in each nested loop. That is a very bad
858 * thing cpu wise - just send the message
859 * to every connected server and let that
860 * server deal with it.
861 * -wnder
862 */
863 if (client_p != one && !IsDefunct(client_p))
864 send_message_remote(client_p, from, remote_buf, remote_len);
865 }
866 }
867
868 /* sendto_match_servs()
869 *
870 * inputs - source client
871 * - mask to send to
872 * - capab needed
873 * - data
874 * outputs - none
875 * side effects - data sent to servers matching with capab
876 */
877 void
878 sendto_match_servs(struct Client *source_p, const char *mask, int cap,
879 const char *pattern, ...)
880 {
881 va_list args;
882 struct Client *target_p;
883 dlink_node *ptr;
884 char buffer[IRCD_BUFSIZE];
885 int found = 0;
886
887 va_start(args, pattern);
888 vsnprintf(buffer, sizeof(buffer), pattern, args);
889 va_end(args);
890
891 ++current_serial;
892
893 DLINK_FOREACH(ptr, global_serv_list.head)
894 {
895 target_p = ptr->data;
896
897 /* Do not attempt to send to ourselves, or the source */
898 if (IsMe(target_p) || target_p->from == source_p->from)
899 continue;
900
901 if (target_p->from->localClient->serial == current_serial)
902 continue;
903
904 if (match(mask, target_p->name))
905 {
906 /*
907 * if we set the serial here, then we'll never do a
908 * match() again, if !IsCapable()
909 */
910 target_p->from->localClient->serial = current_serial;
911 found++;
912
913 if (!IsCapable(target_p->from, cap))
914 continue;
915
916 sendto_anywhere(target_p, source_p, "%s", buffer);
917 }
918 }
919 }
920
921 /* sendto_anywhere()
922 *
923 * inputs - pointer to dest client
924 * - pointer to from client
925 * - varags
926 * output - NONE
927 * side effects - less efficient than sendto_remote and sendto_one
928 * but useful when one does not know where target "lives"
929 */
930 void
931 sendto_anywhere(struct Client *to, struct Client *from,
932 const char *pattern, ...)
933 {
934 va_list args;
935 char buffer[IRCD_BUFSIZE];
936 int len;
937 struct Client *send_to = (to->from != NULL ? to->from : to);
938
939 if (IsDead(send_to))
940 return;
941
942 if (MyClient(to))
943 {
944 if (IsServer(from))
945 {
946 if (IsCapable(to, CAP_TS6) && HasID(from))
947 len = ircsprintf(buffer, ":%s ", from->id);
948 else
949 len = ircsprintf(buffer, ":%s ", from->name);
950 }
951 else
952 len = ircsprintf(buffer, ":%s!%s@%s ",
953 from->name, from->username, from->host);
954 }
955 else len = ircsprintf(buffer, ":%s ", ID_or_name(from, send_to));
956
957 va_start(args, pattern);
958 len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
959 va_end(args);
960
961 if(MyClient(to))
962 send_message(send_to, buffer, len);
963 else
964 send_message_remote(send_to, from, buffer, len);
965 }
966
967 /* sendto_realops_flags()
968 *
969 * inputs - flag types of messages to show to real opers
970 * - flag indicating opers/admins
971 * - var args input message
972 * output - NONE
973 * side effects - Send to *local* ops only but NOT +s nonopers.
974 */
975 void
976 sendto_realops_flags(unsigned int flags, int level, const char *pattern, ...)
977 {
978 dlink_node *ptr = NULL;
979 char nbuf[IRCD_BUFSIZE];
980 va_list args;
981
982 va_start(args, pattern);
983 vsnprintf(nbuf, IRCD_BUFSIZE, pattern, args);
984 va_end(args);
985
986 DLINK_FOREACH(ptr, oper_list.head)
987 {
988 struct Client *client_p = ptr->data;
989 assert(client_p->umodes & UMODE_OPER);
990
991 /* If we're sending it to opers and theyre an admin, skip.
992 * If we're sending it to admins, and theyre not, skip.
993 */
994 if (((level == L_ADMIN) && !IsAdmin(client_p)) ||
995 ((level == L_OPER) && IsAdmin(client_p)))
996 continue;
997
998 if (client_p->umodes & flags)
999 sendto_one(client_p, ":%s NOTICE %s :*** Notice -- %s",
1000 me.name, client_p->name, nbuf);
1001 }
1002 }
1003
1004 /* sendto_wallops_flags()
1005 *
1006 * inputs - flag types of messages to show to real opers
1007 * - client sending request
1008 * - var args input message
1009 * output - NONE
1010 * side effects - Send a wallops to local opers
1011 */
1012 void
1013 sendto_wallops_flags(unsigned int flags, struct Client *source_p,
1014 const char *pattern, ...)
1015 {
1016 dlink_node *ptr = NULL;
1017 va_list args;
1018 char buffer[IRCD_BUFSIZE];
1019 int len;
1020
1021 if (IsClient(source_p))
1022 len = ircsprintf(buffer, ":%s!%s@%s WALLOPS :",
1023 source_p->name, source_p->username, source_p->host);
1024 else
1025 len = ircsprintf(buffer, ":%s WALLOPS :", source_p->name);
1026
1027 va_start(args, pattern);
1028 len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
1029 va_end(args);
1030
1031 DLINK_FOREACH(ptr, oper_list.head)
1032 {
1033 struct Client *client_p = ptr->data;
1034 assert(client_p->umodes & UMODE_OPER);
1035
1036 if ((client_p->umodes & flags) && !IsDefunct(client_p))
1037 send_message(client_p, buffer, len);
1038 }
1039 }
1040
1041 /* ts_warn()
1042 *
1043 * inputs - var args message
1044 * output - NONE
1045 * side effects - Call sendto_realops_flags, with some flood checking
1046 * (at most 5 warnings every 5 seconds)
1047 */
1048 void
1049 ts_warn(const char *pattern, ...)
1050 {
1051 va_list args;
1052 char buffer[IRCD_BUFSIZE];
1053 static time_t last = 0;
1054 static int warnings = 0;
1055
1056 /*
1057 ** if we're running with TS_WARNINGS enabled and someone does
1058 ** something silly like (remotely) connecting a nonTS server,
1059 ** we'll get a ton of warnings, so we make sure we don't send
1060 ** more than 5 every 5 seconds. -orabidoo
1061 */
1062
1063 if (CurrentTime - last < 5)
1064 {
1065 if (++warnings > 5)
1066 return;
1067 }
1068 else
1069 {
1070 last = CurrentTime;
1071 warnings = 0;
1072 }
1073
1074 va_start(args, pattern);
1075 vsprintf_irc(buffer, pattern, args);
1076 va_end(args);
1077
1078 sendto_realops_flags(UMODE_ALL, L_ALL, "%s", buffer);
1079 ilog(L_CRIT, "%s", buffer);
1080 }
1081
1082 /* kill_client()
1083 *
1084 * inputs - client to send kill towards
1085 * - pointer to client to kill
1086 * - reason for kill
1087 * output - NONE
1088 * side effects - NONE
1089 */
1090 void
1091 kill_client(struct Client *client_p, struct Client *diedie,
1092 const char *pattern, ...)
1093 {
1094 va_list args;
1095 char buffer[IRCD_BUFSIZE];
1096 int len;
1097
1098 if (client_p->from != NULL)
1099 client_p = client_p->from;
1100 if (IsDead(client_p))
1101 return;
1102
1103 len = ircsprintf(buffer, ":%s KILL %s :", ID_or_name(&me, client_p->from),
1104 ID_or_name(diedie, client_p));
1105
1106 va_start(args, pattern);
1107 len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
1108 va_end(args);
1109
1110 send_message(client_p, buffer, len);
1111 }
1112
1113 /* kill_client_ll_serv_butone()
1114 *
1115 * inputs - pointer to client to not send to
1116 * - pointer to client to kill
1117 * output - NONE
1118 * side effects - Send a KILL for the given client
1119 * message to all connected servers
1120 * except the client 'one'. Also deal with
1121 * client being unknown to leaf, as in lazylink...
1122 */
1123 void
1124 kill_client_ll_serv_butone(struct Client *one, struct Client *source_p,
1125 const char *pattern, ...)
1126 {
1127 va_list args;
1128 int have_uid = 0;
1129 dlink_node *ptr = NULL;
1130 char buf_uid[IRCD_BUFSIZE], buf_nick[IRCD_BUFSIZE];
1131 int len_uid = 0, len_nick = 0;
1132
1133 if (HasID(source_p) && (me.id[0] != '\0'))
1134 {
1135 have_uid = 1;
1136 va_start(args, pattern);
1137 len_uid = ircsprintf(buf_uid, ":%s KILL %s :", me.id, ID(source_p));
1138 len_uid += send_format(&buf_uid[len_uid], IRCD_BUFSIZE - len_uid, pattern,
1139 args);
1140 va_end(args);
1141 }
1142
1143 va_start(args, pattern);
1144 len_nick = ircsprintf(buf_nick, ":%s KILL %s :", me.name, source_p->name);
1145 len_nick += send_format(&buf_nick[len_nick], IRCD_BUFSIZE - len_nick, pattern,
1146 args);
1147 va_end(args);
1148
1149 DLINK_FOREACH(ptr, serv_list.head)
1150 {
1151 struct Client *client_p = ptr->data;
1152
1153 if (one != NULL && (client_p == one->from))
1154 continue;
1155 if (IsDefunct(client_p))
1156 continue;
1157
1158 if (have_uid && IsCapable(client_p, CAP_TS6))
1159 send_message(client_p, buf_uid, len_uid);
1160 else
1161 send_message(client_p, buf_nick, len_nick);
1162 }
1163 }

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