/[svn]/ircd-hybrid-7.2/src/send.c
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Annotation of /ircd-hybrid-7.2/src/send.c

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Revision 885 - (hide annotations)
Wed Oct 31 18:09:24 2007 UTC (12 years, 3 months ago) by michael
File MIME type: text/x-chdr
File size: 32259 byte(s)
- Removed LazyLinks in 7.2 to stop people from asking why we keep
  broken code for half a decade. LL will be implemented in a smarter
  fashion in due time

1 adx 30 /*
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 knight 31 * $Id$
23 adx 30 */
24    
25     #include "stdinc.h"
26     #include "tools.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 "list.h"
42     #include "s_log.h"
43     #include "memory.h"
44     #include "hook.h"
45     #include "irc_getnameinfo.h"
46     #include "packet.h"
47    
48     #define LOG_BUFSIZE 2048
49    
50     struct Callback *iosend_cb = NULL;
51     struct Callback *iosendctrl_cb = NULL;
52    
53     static void send_message(struct Client *, char *, int);
54     static void send_message_remote(struct Client *, struct Client *, char *, int);
55    
56     static unsigned long current_serial = 0L;
57    
58     /* send_format()
59     *
60     * inputs - buffer to format into
61     * - size of the buffer
62     * - format pattern to use
63     * - var args
64     * output - number of bytes formatted output
65     * side effects - modifies sendbuf
66     */
67     static inline int
68     send_format(char *lsendbuf, int bufsize, const char *pattern, va_list args)
69     {
70     int len;
71    
72     /*
73     * from rfc1459
74     *
75     * IRC messages are always lines of characters terminated with a CR-LF
76     * (Carriage Return - Line Feed) pair, and these messages shall not
77     * exceed 512 characters in length, counting all characters
78     * including the trailing CR-LF.
79     * Thus, there are 510 characters maximum allowed
80     * for the command and its parameters. There is no provision for
81     * continuation message lines. See section 7 for more details about
82     * current implementations.
83     */
84     len = vsnprintf(lsendbuf, bufsize - 1, pattern, args);
85     if (len > bufsize - 2)
86     len = bufsize - 2; /* required by some versions of vsnprintf */
87    
88     lsendbuf[len++] = '\r';
89     lsendbuf[len++] = '\n';
90     return (len);
91     }
92    
93     /*
94 adx 163 * iosend_default - append a packet to the client's sendq.
95     */
96     void *
97     iosend_default(va_list args)
98     {
99     struct Client *to = va_arg(args, struct Client *);
100     int length = va_arg(args, int);
101     char *buf = va_arg(args, char *);
102    
103     dbuf_put(&to->localClient->buf_sendq, buf, length);
104     return NULL;
105     }
106    
107     /*
108 adx 30 ** send_message
109     ** Internal utility which appends given buffer to the sockets
110     ** sendq.
111     */
112     static void
113     send_message(struct Client *to, char *buf, int len)
114     {
115 michael 439 assert(!IsMe(to));
116 michael 438 assert(to != &me);
117 adx 30
118     if (dbuf_length(&to->localClient->buf_sendq) + len > get_sendq(to))
119     {
120     if (IsServer(to))
121     sendto_realops_flags(UMODE_ALL, L_ALL,
122     "Max SendQ limit exceeded for %s: %lu > %lu",
123     get_client_name(to, HIDE_IP),
124     (unsigned long)(dbuf_length(&to->localClient->buf_sendq) + len),
125     get_sendq(to));
126     if (IsClient(to))
127     SetSendQExceeded(to);
128     dead_link_on_write(to, 0);
129     return;
130     }
131    
132 adx 163 execute_callback(iosend_cb, to, len, buf);
133 adx 30
134     /*
135     ** Update statistics. The following is slightly incorrect
136     ** because it counts messages even if queued, but bytes
137     ** only really sent. Queued bytes get updated in SendQueued.
138     */
139     ++to->localClient->send.messages;
140     ++me.localClient->send.messages;
141    
142     if (dbuf_length(&to->localClient->buf_sendq) >
143     (IsServer(to) ? (unsigned int) 1024 : (unsigned int) 4096))
144     send_queued_write(to);
145     }
146    
147     /* send_message_remote()
148     *
149     * inputs - pointer to client from message is being sent
150     * - pointer to client to send to
151     * - pointer to preformatted buffer
152     * - length of input buffer
153     * output - none
154     * side effects - Despite the function name, this only sends to directly
155     * connected clients.
156     *
157     */
158     static void
159     send_message_remote(struct Client *to, struct Client *from,
160     char *buf, int len)
161     {
162     if (!MyConnect(to))
163     {
164     sendto_realops_flags(UMODE_ALL, L_ALL,
165     "server send message to %s [%s] dropped from %s(Not local server)",
166     to->name, to->from->name, from->name);
167     return;
168     }
169    
170     /* Optimize by checking if (from && to) before everything */
171     /* we set to->from up there.. */
172    
173     if (!MyClient(from) && IsClient(to) && (to == from->from))
174     {
175     if (IsServer(from))
176     {
177     sendto_realops_flags(UMODE_ALL, L_ALL,
178     "Send message to %s [%s] dropped from %s(Fake Dir)",
179     to->name, to->from->name, from->name);
180     return;
181     }
182    
183     sendto_realops_flags(UMODE_ALL, L_ALL,
184     "Ghosted: %s[%s@%s] from %s[%s@%s] (%s)",
185     to->name, to->username, to->host,
186     from->name, from->username, from->host,
187     to->from->name);
188    
189 michael 885 sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
190 adx 30 ":%s KILL %s :%s (%s[%s@%s] Ghosted %s)",
191     me.id, to->name, me.name, to->name,
192     to->username, to->host, to->from->name);
193 michael 885 sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
194 adx 30 ":%s KILL %s :%s (%s[%s@%s] Ghosted %s)",
195     me.name, to->name, me.name, to->name,
196     to->username, to->host, to->from->name);
197    
198     SetKilled(to);
199    
200     if (IsClient(from))
201     sendto_one(from, form_str(ERR_GHOSTEDCLIENT),
202     me.name, from->name, to->name, to->username,
203     to->host, to->from);
204    
205     exit_client(to, &me, "Ghosted client");
206    
207     return;
208     }
209    
210     send_message(to, buf, len);
211     }
212    
213     /*
214     ** sendq_unblocked
215     ** Called when a socket is ready for writing.
216     */
217     void
218     sendq_unblocked(fde_t *fd, struct Client *client_p)
219     {
220     ClearSendqBlocked(client_p);
221     /* let send_queued_write be executed by send_queued_all */
222    
223     #ifdef HAVE_LIBCRYPTO
224     if (fd->flags.pending_read)
225     {
226     fd->flags.pending_read = 0;
227     read_packet(fd, client_p);
228     }
229     #endif
230     }
231    
232     /*
233     ** slinkq_unblocked
234     ** Called when a server control socket is ready for writing.
235     */
236     static void
237     slinkq_unblocked(fde_t *fd, struct Client *client_p)
238     {
239     ClearSlinkqBlocked(client_p);
240     send_queued_slink_write(client_p);
241     }
242    
243     /*
244     ** send_queued_write
245     ** This is called when there is a chance that some output would
246     ** be possible. This attempts to empty the send queue as far as
247     ** possible, and then if any data is left, a write is rescheduled.
248     */
249     void
250     send_queued_write(struct Client *to)
251     {
252     int retlen;
253     struct dbuf_block *first;
254    
255     /*
256     ** Once socket is marked dead, we cannot start writing to it,
257     ** even if the error is removed...
258     */
259     if (IsDead(to) || IsSendqBlocked(to))
260     return; /* no use calling send() now */
261    
262     /* Next, lets try to write some data */
263    
264     if (dbuf_length(&to->localClient->buf_sendq))
265     {
266     do {
267     first = to->localClient->buf_sendq.blocks.head->data;
268    
269     #ifdef HAVE_LIBCRYPTO
270     if (to->localClient->fd.ssl)
271     {
272     retlen = SSL_write(to->localClient->fd.ssl, first->data, first->size);
273    
274     /* translate openssl error codes, sigh */
275     if (retlen < 0)
276     switch (SSL_get_error(to->localClient->fd.ssl, retlen))
277     {
278     case SSL_ERROR_WANT_READ:
279     return; /* retry later, don't register for write events */
280    
281     case SSL_ERROR_WANT_WRITE:
282     errno = EWOULDBLOCK;
283     case SSL_ERROR_SYSCALL:
284     break;
285 michael 430 case SSL_ERROR_SSL:
286     if (errno == EAGAIN)
287     break;
288 adx 30 default:
289     retlen = errno = 0; /* either an SSL-specific error or EOF */
290     }
291     }
292     else
293     #endif
294     retlen = send(to->localClient->fd.fd, first->data, first->size, 0);
295    
296     if (retlen <= 0)
297     {
298     #ifdef _WIN32
299     errno = WSAGetLastError();
300     #endif
301     break;
302     }
303    
304     dbuf_delete(&to->localClient->buf_sendq, retlen);
305    
306     /* We have some data written .. update counters */
307     to->localClient->send.bytes += retlen;
308     me.localClient->send.bytes += retlen;
309     } while (dbuf_length(&to->localClient->buf_sendq));
310    
311     if ((retlen < 0) && (ignoreErrno(errno)))
312     {
313     /* we have a non-fatal error, reschedule a write */
314     SetSendqBlocked(to);
315     comm_setselect(&to->localClient->fd, COMM_SELECT_WRITE,
316     (PF *)sendq_unblocked, (void *)to, 0);
317     }
318     else if (retlen <= 0)
319     {
320     dead_link_on_write(to, errno);
321     return;
322     }
323     }
324     }
325    
326     /*
327     ** send_queued_slink_write
328     ** This is called when there is a chance the some output would
329     ** be possible. This attempts to empty the send queue as far as
330     ** possible, and then if any data is left, a write is rescheduled.
331     */
332     void
333     send_queued_slink_write(struct Client *to)
334     {
335     int retlen;
336    
337     /*
338     ** Once socket is marked dead, we cannot start writing to it,
339     ** even if the error is removed...
340     */
341     if (IsDead(to) || IsSlinkqBlocked(to))
342     return; /* no use calling send() now */
343    
344     /* Next, lets try to write some data */
345     if (to->localClient->slinkq != NULL)
346     {
347     retlen = send(to->localClient->ctrlfd.fd,
348     to->localClient->slinkq + to->localClient->slinkq_ofs,
349     to->localClient->slinkq_len, 0);
350     if (retlen < 0)
351     {
352     /* If we have a fatal error */
353     if (!ignoreErrno(errno))
354     {
355     dead_link_on_write(to, errno);
356     return;
357     }
358     }
359     else if (retlen == 0)
360     {
361     /* 0 bytes is an EOF .. */
362     dead_link_on_write(to, 0);
363     return;
364     }
365     else
366     {
367     execute_callback(iosendctrl_cb, to, retlen,
368     to->localClient->slinkq + to->localClient->slinkq_ofs);
369     to->localClient->slinkq_len -= retlen;
370    
371     assert(to->localClient->slinkq_len >= 0);
372     if (to->localClient->slinkq_len)
373     to->localClient->slinkq_ofs += retlen;
374     else
375     {
376     to->localClient->slinkq_ofs = 0;
377     MyFree(to->localClient->slinkq);
378     to->localClient->slinkq = NULL;
379     }
380     }
381    
382     /* Finally, if we have any more data, reschedule a write */
383     if (to->localClient->slinkq_len)
384     {
385     SetSlinkqBlocked(to);
386     comm_setselect(&to->localClient->ctrlfd, COMM_SELECT_WRITE,
387     (PF *)slinkq_unblocked, (void *)to, 0);
388     }
389     }
390     }
391    
392     /* send_queued_all()
393     *
394     * input - NONE
395     * output - NONE
396     * side effects - try to flush sendq of each client
397     */
398     void
399     send_queued_all(void)
400     {
401     dlink_node *ptr;
402    
403     /* Servers are processed first, mainly because this can generate
404     * a notice to opers, which is to be delivered by this function.
405     */
406     DLINK_FOREACH(ptr, serv_list.head)
407     send_queued_write((struct Client *) ptr->data);
408    
409     DLINK_FOREACH(ptr, unknown_list.head)
410     send_queued_write((struct Client *) ptr->data);
411    
412     DLINK_FOREACH(ptr, local_client_list.head)
413     send_queued_write((struct Client *) ptr->data);
414    
415     /* NOTE: This can still put clients on aborted_list; unfortunately,
416     * exit_aborted_clients takes precedence over send_queued_all,
417     * because exiting clients can generate server/oper traffic.
418     * The easiest approach is dealing with aborted clients in the next I/O lap.
419     * -adx
420     */
421     }
422    
423     /* sendto_one()
424     *
425     * inputs - pointer to destination client
426     * - var args message
427     * output - NONE
428     * side effects - send message to single client
429     */
430     void
431     sendto_one(struct Client *to, const char *pattern, ...)
432     {
433     va_list args;
434     char buffer[IRCD_BUFSIZE];
435     int len;
436    
437     if (to->from != NULL)
438     to = to->from;
439     if (IsDead(to))
440     return; /* This socket has already been marked as dead */
441    
442     va_start(args, pattern);
443     len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
444     va_end(args);
445    
446     send_message(to, buffer, len);
447     }
448    
449     /* sendto_channel_butone()
450     *
451     * inputs - pointer to client(server) to NOT send message to
452     * - pointer to client that is sending this message
453     * - pointer to channel being sent to
454     * - vargs message
455     * output - NONE
456     * side effects - message as given is sent to given channel members.
457     *
458     * WARNING - +D clients are ignored
459     */
460     void
461     sendto_channel_butone(struct Client *one, struct Client *from,
462     struct Channel *chptr, const char *command,
463     const char *pattern, ...)
464     {
465 adx 285 va_list alocal, aremote, auid;
466 adx 30 char local_buf[IRCD_BUFSIZE];
467     char remote_buf[IRCD_BUFSIZE];
468     char uid_buf[IRCD_BUFSIZE];
469     int local_len, remote_len, uid_len;
470     dlink_node *ptr;
471     dlink_node *ptr_next;
472     struct Client *target_p;
473    
474     if (IsServer(from))
475     local_len = ircsprintf(local_buf, ":%s %s %s ",
476     from->name, command, chptr->chname);
477     else
478     local_len = ircsprintf(local_buf, ":%s!%s@%s %s %s ",
479     from->name, from->username, from->host,
480     command, chptr->chname);
481     remote_len = ircsprintf(remote_buf, ":%s %s %s ",
482     from->name, command, chptr->chname);
483     uid_len = ircsprintf(uid_buf, ":%s %s %s ",
484     ID(from), command, chptr->chname);
485    
486 adx 285 va_start(alocal, pattern);
487     va_start(aremote, pattern);
488     va_start(auid, pattern);
489 adx 30 local_len += send_format(&local_buf[local_len], IRCD_BUFSIZE - local_len,
490 adx 285 pattern, alocal);
491 adx 30 remote_len += send_format(&remote_buf[remote_len], IRCD_BUFSIZE - remote_len,
492 adx 285 pattern, aremote);
493 adx 30 uid_len += send_format(&uid_buf[uid_len], IRCD_BUFSIZE - uid_len, pattern,
494 adx 285 auid);
495     va_end(auid);
496     va_end(aremote);
497     va_end(alocal);
498 adx 30
499     ++current_serial;
500    
501     DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
502     {
503     target_p = ((struct Membership *)ptr->data)->client_p;
504     assert(target_p != NULL);
505    
506     if (IsDefunct(target_p) || IsDeaf(target_p) || target_p->from == one)
507     continue;
508    
509     if (MyClient(target_p))
510     {
511     if (target_p->serial != current_serial)
512     {
513     send_message(target_p, local_buf, local_len);
514     target_p->serial = current_serial;
515     }
516     }
517     else
518     {
519     /* Now check whether a message has been sent to this
520     * remote link already
521     */
522     if (target_p->from->serial != current_serial)
523     {
524     if (IsCapable(target_p->from, CAP_TS6))
525     send_message_remote(target_p->from, from, uid_buf, uid_len);
526     else
527     send_message_remote(target_p->from, from, remote_buf, remote_len);
528     target_p->from->serial = current_serial;
529     }
530     }
531     }
532     }
533    
534     /* sendto_server()
535     *
536     * inputs - pointer to client to NOT send to
537     * - pointer to source client required by LL (if any)
538     * - pointer to channel required by LL (if any)
539     * - caps or'd together which must ALL be present
540     * - caps or'd together which must ALL NOT be present
541     * - printf style format string
542     * - args to format string
543     * output - NONE
544     * side effects - Send a message to all connected servers, except the
545     * client 'one' (if non-NULL), as long as the servers
546     * support ALL capabs in 'caps', and NO capabs in 'nocaps'.
547     *
548     * This function was written in an attempt to merge together the other
549     * billion sendto_*serv*() functions, which sprung up with capabs,
550     * lazylinks, uids, etc.
551     * -davidt
552     */
553     void
554 michael 885 sendto_server(struct Client *one,
555 adx 30 struct Channel *chptr, unsigned long caps,
556 michael 885 unsigned long nocaps,
557 adx 30 const char *format, ...)
558     {
559     va_list args;
560 michael 885 dlink_node *ptr = NULL;
561 adx 30 char buffer[IRCD_BUFSIZE];
562 michael 885 int len = 0;
563 adx 30
564 michael 885 if (chptr && chptr->chname[0] != '#')
565     return;
566 adx 30
567     va_start(args, format);
568     len = send_format(buffer, IRCD_BUFSIZE, format, args);
569     va_end(args);
570    
571     DLINK_FOREACH(ptr, serv_list.head)
572     {
573 michael 885 struct Client *client_p = ptr->data;
574 adx 30
575     /* If dead already skip */
576     if (IsDead(client_p))
577     continue;
578     /* check against 'one' */
579     if (one != NULL && (client_p == one->from))
580     continue;
581     /* check we have required capabs */
582     if ((client_p->localClient->caps & caps) != caps)
583     continue;
584     /* check we don't have any forbidden capabs */
585     if ((client_p->localClient->caps & nocaps) != 0)
586     continue;
587    
588     send_message(client_p, buffer, len);
589     }
590     }
591    
592     /* sendto_common_channels_local()
593     *
594     * inputs - pointer to client
595     * - pattern to send
596     * output - NONE
597     * side effects - Sends a message to all people on local server who are
598     * in same channel with user.
599     * used by m_nick.c and exit_one_client.
600     */
601     void
602     sendto_common_channels_local(struct Client *user, int touser,
603     const char *pattern, ...)
604     {
605     va_list args;
606     dlink_node *uptr;
607     dlink_node *cptr;
608     struct Channel *chptr;
609     struct Membership *ms;
610     struct Client *target_p;
611     char buffer[IRCD_BUFSIZE];
612     int len;
613    
614     va_start(args, pattern);
615     len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
616     va_end(args);
617    
618     ++current_serial;
619    
620     DLINK_FOREACH(cptr, user->channel.head)
621     {
622     chptr = ((struct Membership *) cptr->data)->chptr;
623     assert(chptr != NULL);
624    
625 michael 572 DLINK_FOREACH(uptr, chptr->members.head)
626 adx 30 {
627     ms = uptr->data;
628     target_p = ms->client_p;
629     assert(target_p != NULL);
630    
631 michael 572 if (!MyConnect(target_p) || target_p == user || IsDefunct(target_p) ||
632 adx 30 target_p->serial == current_serial)
633     continue;
634    
635     target_p->serial = current_serial;
636     send_message(target_p, buffer, len);
637     }
638     }
639    
640     if (touser && MyConnect(user) && !IsDead(user) &&
641     user->serial != current_serial)
642     send_message(user, buffer, len);
643     }
644    
645     /* sendto_channel_local()
646     *
647     * inputs - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
648     * - whether to ignore +D clients (YES/NO)
649     * - pointer to channel to send to
650     * - var args pattern
651     * output - NONE
652     * side effects - Send a message to all members of a channel that are
653     * locally connected to this server.
654     */
655     void
656     sendto_channel_local(int type, int nodeaf, struct Channel *chptr,
657     const char *pattern, ...)
658     {
659     va_list args;
660     char buffer[IRCD_BUFSIZE];
661     int len;
662     dlink_node *ptr;
663     struct Membership *ms;
664     struct Client *target_p;
665    
666     va_start(args, pattern);
667     len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
668     va_end(args);
669    
670 michael 572 DLINK_FOREACH(ptr, chptr->members.head)
671 adx 30 {
672     ms = ptr->data;
673     target_p = ms->client_p;
674    
675     if (type != 0 && (ms->flags & type) == 0)
676     continue;
677    
678 michael 572 if (!MyConnect(target_p) || IsDefunct(target_p) ||
679     (nodeaf && IsDeaf(target_p)))
680 adx 30 continue;
681    
682     send_message(target_p, buffer, len);
683     }
684     }
685    
686     /* sendto_channel_local_butone()
687     *
688     * inputs - pointer to client to NOT send message to
689     * - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
690     * - pointer to channel to send to
691     * - var args pattern
692     * output - NONE
693     * side effects - Send a message to all members of a channel that are
694     * locally connected to this server except one.
695     *
696     * WARNING - +D clients are omitted
697     */
698     void
699     sendto_channel_local_butone(struct Client *one, int type,
700     struct Channel *chptr, const char *pattern, ...)
701     {
702     va_list args;
703     char buffer[IRCD_BUFSIZE];
704     int len;
705     struct Client *target_p;
706     struct Membership *ms;
707     dlink_node *ptr;
708    
709     va_start(args, pattern);
710     len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
711     va_end(args);
712    
713 michael 572 DLINK_FOREACH(ptr, chptr->members.head)
714 adx 30 {
715     ms = ptr->data;
716     target_p = ms->client_p;
717    
718     if (type != 0 && (ms->flags & type) == 0)
719     continue;
720    
721 michael 572 if (!MyConnect(target_p) || target_p == one ||
722     IsDefunct(target_p) || IsDeaf(target_p))
723 adx 30 continue;
724     send_message(target_p, buffer, len);
725     }
726     }
727    
728    
729     /* sendto_channel_remote()
730     *
731     * inputs - Client not to send towards
732     * - Client from whom message is from
733     * - member status mask, e.g. CHFL_CHANOP | CHFL_VOICE
734     * - pointer to channel to send to
735     * - var args pattern
736     * output - NONE
737     * side effects - Send a message to all members of a channel that are
738     * remote to this server.
739     */
740     void
741     sendto_channel_remote(struct Client *one, struct Client *from, int type, int caps,
742     int nocaps, struct Channel *chptr, const char *pattern, ...)
743     {
744     va_list args;
745     char buffer[IRCD_BUFSIZE];
746     int len;
747     dlink_node *ptr;
748     struct Client *target_p;
749     struct Membership *ms;
750    
751     va_start(args, pattern);
752     len = send_format(buffer, IRCD_BUFSIZE, pattern, args);
753     va_end(args);
754    
755 db 189 ++current_serial;
756    
757 adx 30 DLINK_FOREACH(ptr, chptr->members.head)
758     {
759     ms = ptr->data;
760     target_p = ms->client_p;
761    
762     if (type != 0 && (ms->flags & type) == 0)
763     continue;
764    
765     if (MyConnect(target_p))
766     continue;
767     target_p = target_p->from;
768    
769     if (target_p == one->from ||
770     ((target_p->from->localClient->caps & caps) != caps) ||
771     ((target_p->from->localClient->caps & nocaps) != 0))
772     continue;
773 db 189 if (target_p->from->serial != current_serial)
774     {
775     send_message(target_p, buffer, len);
776     target_p->from->serial = current_serial;
777     }
778 adx 30 }
779     }
780    
781     /*
782     ** match_it() and sendto_match_butone() ARE only used
783     ** to send a msg to all ppl on servers/hosts that match a specified mask
784     ** (used for enhanced PRIVMSGs) for opers
785     **
786     ** addition -- Armin, 8jun90 (gruner@informatik.tu-muenchen.de)
787     **
788     */
789    
790     /* match_it()
791     *
792     * inputs - client pointer to match on
793     * - actual mask to match
794     * - what to match on, HOST or SERVER
795     * output - 1 or 0 if match or not
796     * side effects - NONE
797     */
798     static int
799     match_it(const struct Client *one, const char *mask, int what)
800     {
801     if (what == MATCH_HOST)
802     return(match(mask, one->host));
803    
804     return(match(mask, one->servptr->name));
805     }
806    
807     /* sendto_match_butone()
808     *
809     * Send to all clients which match the mask in a way defined on 'what';
810     * either by user hostname or user servername.
811     *
812     * ugh. ONLY used by m_message.c to send an "oper magic" message. ugh.
813     */
814     void
815     sendto_match_butone(struct Client *one, struct Client *from, char *mask,
816     int what, const char *pattern, ...)
817     {
818 adx 285 va_list alocal, aremote;
819 adx 30 struct Client *client_p;
820     dlink_node *ptr, *ptr_next;
821     char local_buf[IRCD_BUFSIZE], remote_buf[IRCD_BUFSIZE];
822     int local_len = ircsprintf(local_buf, ":%s!%s@%s ", from->name,
823     from->username, from->host);
824     int remote_len = ircsprintf(remote_buf, ":%s ", from->name);
825    
826 adx 285 va_start(alocal, pattern);
827     va_start(aremote, pattern);
828 adx 30 local_len += send_format(&local_buf[local_len], IRCD_BUFSIZE - local_len,
829 adx 285 pattern, alocal);
830 adx 30 remote_len += send_format(&remote_buf[remote_len], IRCD_BUFSIZE - remote_len,
831 adx 285 pattern, aremote);
832     va_end(aremote);
833     va_end(alocal);
834 adx 30
835     /* scan the local clients */
836     DLINK_FOREACH(ptr, local_client_list.head)
837     {
838     client_p = ptr->data;
839    
840     if (client_p != one && !IsDefunct(client_p) &&
841     match_it(client_p, mask, what))
842     send_message(client_p, local_buf, local_len);
843     }
844    
845     /* Now scan servers */
846     DLINK_FOREACH_SAFE(ptr, ptr_next, serv_list.head)
847     {
848     client_p = ptr->data;
849    
850     /*
851     * The old code looped through every client on the
852     * network for each server to check if the
853     * server (client_p) has at least 1 client matching
854     * the mask, using something like:
855     *
856     * for (target_p = GlobalClientList; target_p; target_p = target_p->next)
857     * if (IsRegisteredUser(target_p) &&
858     * match_it(target_p, mask, what) &&
859     * (target_p->from == client_p))
860     * vsendto_prefix_one(client_p, from, pattern, args);
861     *
862     * That way, we wouldn't send the message to
863     * a server who didn't have a matching client.
864     * However, on a network such as EFNet, that
865     * code would have looped through about 50
866     * servers, and in each loop, loop through
867     * about 50k clients as well, calling match()
868     * in each nested loop. That is a very bad
869     * thing cpu wise - just send the message
870     * to every connected server and let that
871     * server deal with it.
872     * -wnder
873     */
874     if (client_p != one && !IsDefunct(client_p))
875     send_message_remote(client_p, from, remote_buf, remote_len);
876     }
877     }
878    
879     /* sendto_match_servs()
880     *
881     * inputs - source client
882     * - mask to send to
883     * - capab needed
884     * - data
885     * outputs - none
886     * side effects - data sent to servers matching with capab
887     */
888     void
889     sendto_match_servs(struct Client *source_p, const char *mask, int cap,
890     const char *pattern, ...)
891     {
892     va_list args;
893     struct Client *target_p;
894     dlink_node *ptr;
895     char buffer[IRCD_BUFSIZE];
896     int found = 0;
897    
898     va_start(args, pattern);
899     vsnprintf(buffer, sizeof(buffer), pattern, args);
900     va_end(args);
901    
902     current_serial++;
903    
904     DLINK_FOREACH(ptr, global_serv_list.head)
905     {
906     target_p = ptr->data;
907    
908     /* Do not attempt to send to ourselves, or the source */
909     if (IsMe(target_p) || target_p->from == source_p->from)
910     continue;
911    
912     if (target_p->from->serial == current_serial)
913     continue;
914    
915     if (match(mask, target_p->name))
916     {
917     /*
918     * if we set the serial here, then we'll never do a
919     * match() again, if !IsCapable()
920     */
921     target_p->from->serial = current_serial;
922     found++;
923    
924     if (!IsCapable(target_p->from, cap))
925     continue;
926    
927     sendto_anywhere(target_p, source_p, "%s", buffer);
928     }
929     }
930     }
931    
932     /* sendto_anywhere()
933     *
934     * inputs - pointer to dest client
935     * - pointer to from client
936     * - varags
937     * output - NONE
938     * side effects - less efficient than sendto_remote and sendto_one
939     * but useful when one does not know where target "lives"
940     */
941     void
942     sendto_anywhere(struct Client *to, struct Client *from,
943     const char *pattern, ...)
944     {
945     va_list args;
946     char buffer[IRCD_BUFSIZE];
947     int len;
948     struct Client *send_to = (to->from != NULL ? to->from : to);
949    
950     if (IsDead(send_to))
951     return;
952    
953     if (MyClient(to))
954     {
955     if (IsServer(from))
956     {
957     if (IsCapable(to, CAP_TS6) && HasID(from))
958     len = ircsprintf(buffer, ":%s ", from->id);
959     else
960     len = ircsprintf(buffer, ":%s ", from->name);
961     }
962     else
963     len = ircsprintf(buffer, ":%s!%s@%s ",
964     from->name, from->username, from->host);
965     }
966     else len = ircsprintf(buffer, ":%s ", ID_or_name(from, send_to));
967    
968     va_start(args, pattern);
969     len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
970     va_end(args);
971    
972     if(MyClient(to))
973     send_message(send_to, buffer, len);
974     else
975     send_message_remote(send_to, from, buffer, len);
976     }
977    
978     /* sendto_realops_flags()
979     *
980     * inputs - flag types of messages to show to real opers
981     * - flag indicating opers/admins
982     * - var args input message
983     * output - NONE
984     * side effects - Send to *local* ops only but NOT +s nonopers.
985     */
986     void
987     sendto_realops_flags(unsigned int flags, int level, const char *pattern, ...)
988     {
989     struct Client *client_p;
990     char nbuf[IRCD_BUFSIZE];
991     dlink_node *ptr;
992     va_list args;
993    
994     va_start(args, pattern);
995     vsnprintf(nbuf, IRCD_BUFSIZE, pattern, args);
996     va_end(args);
997    
998     DLINK_FOREACH(ptr, oper_list.head)
999     {
1000     client_p = ptr->data;
1001     assert(client_p->umodes & UMODE_OPER);
1002    
1003     /* If we're sending it to opers and theyre an admin, skip.
1004     * If we're sending it to admins, and theyre not, skip.
1005     */
1006     if (((level == L_ADMIN) && !IsAdmin(client_p)) ||
1007     ((level == L_OPER) && IsAdmin(client_p)))
1008     continue;
1009    
1010     if (client_p->umodes & flags)
1011     sendto_one(client_p, ":%s NOTICE %s :*** Notice -- %s",
1012     me.name, client_p->name, nbuf);
1013     }
1014     }
1015    
1016     /* sendto_wallops_flags()
1017     *
1018     * inputs - flag types of messages to show to real opers
1019     * - client sending request
1020     * - var args input message
1021     * output - NONE
1022     * side effects - Send a wallops to local opers
1023     */
1024     void
1025     sendto_wallops_flags(unsigned int flags, struct Client *source_p,
1026     const char *pattern, ...)
1027     {
1028     struct Client *client_p;
1029     dlink_node *ptr;
1030     va_list args;
1031     char buffer[IRCD_BUFSIZE];
1032     int len;
1033    
1034     if (IsClient(source_p))
1035     len = ircsprintf(buffer, ":%s!%s@%s WALLOPS :",
1036     source_p->name, source_p->username, source_p->host);
1037     else
1038     len = ircsprintf(buffer, ":%s WALLOPS :", source_p->name);
1039    
1040     va_start(args, pattern);
1041     len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
1042     va_end(args);
1043    
1044     DLINK_FOREACH(ptr, oper_list.head)
1045     {
1046     client_p = ptr->data;
1047     assert(client_p->umodes & UMODE_OPER);
1048    
1049     if ((client_p->umodes & flags) && !IsDefunct(client_p))
1050     send_message(client_p, buffer, len);
1051     }
1052     }
1053    
1054     /* ts_warn()
1055     *
1056     * inputs - var args message
1057     * output - NONE
1058     * side effects - Call sendto_realops_flags, with some flood checking
1059     * (at most 5 warnings every 5 seconds)
1060     */
1061     void
1062     ts_warn(const char *pattern, ...)
1063     {
1064     va_list args;
1065     char buffer[LOG_BUFSIZE];
1066     static time_t last = 0;
1067     static int warnings = 0;
1068    
1069     /*
1070     ** if we're running with TS_WARNINGS enabled and someone does
1071     ** something silly like (remotely) connecting a nonTS server,
1072     ** we'll get a ton of warnings, so we make sure we don't send
1073     ** more than 5 every 5 seconds. -orabidoo
1074     */
1075    
1076     if (CurrentTime - last < 5)
1077     {
1078     if (++warnings > 5)
1079     return;
1080     }
1081     else
1082     {
1083     last = CurrentTime;
1084     warnings = 0;
1085     }
1086    
1087     va_start(args, pattern);
1088     vsprintf_irc(buffer, pattern, args);
1089     va_end(args);
1090    
1091     sendto_realops_flags(UMODE_ALL, L_ALL, "%s", buffer);
1092     ilog(L_CRIT, "%s", buffer);
1093     }
1094    
1095     /* kill_client()
1096     *
1097     * inputs - client to send kill towards
1098     * - pointer to client to kill
1099     * - reason for kill
1100     * output - NONE
1101     * side effects - NONE
1102     */
1103     void
1104     kill_client(struct Client *client_p, struct Client *diedie,
1105     const char *pattern, ...)
1106     {
1107     va_list args;
1108     char buffer[IRCD_BUFSIZE];
1109     int len;
1110    
1111     if (client_p->from != NULL)
1112     client_p = client_p->from;
1113     if (IsDead(client_p))
1114     return;
1115    
1116     len = ircsprintf(buffer, ":%s KILL %s :", ID_or_name(&me, client_p->from),
1117     ID_or_name(diedie, client_p));
1118    
1119     va_start(args, pattern);
1120     len += send_format(&buffer[len], IRCD_BUFSIZE - len, pattern, args);
1121     va_end(args);
1122    
1123     send_message(client_p, buffer, len);
1124     }
1125    
1126     /* kill_client_ll_serv_butone()
1127     *
1128     * inputs - pointer to client to not send to
1129     * - pointer to client to kill
1130     * output - NONE
1131     * side effects - Send a KILL for the given client
1132     * message to all connected servers
1133     * except the client 'one'. Also deal with
1134     * client being unknown to leaf, as in lazylink...
1135     */
1136     void
1137     kill_client_ll_serv_butone(struct Client *one, struct Client *source_p,
1138     const char *pattern, ...)
1139     {
1140     va_list args;
1141     int have_uid = 0;
1142 michael 885 dlink_node *ptr = NULL;
1143 adx 30 char buf_uid[IRCD_BUFSIZE], buf_nick[IRCD_BUFSIZE];
1144 michael 885 int len_uid = 0, len_nick = 0;
1145 adx 30
1146     if (HasID(source_p) && (me.id[0] != '\0'))
1147     {
1148     have_uid = 1;
1149 adx 285 va_start(args, pattern);
1150 adx 30 len_uid = ircsprintf(buf_uid, ":%s KILL %s :", me.id, ID(source_p));
1151     len_uid += send_format(&buf_uid[len_uid], IRCD_BUFSIZE - len_uid, pattern,
1152     args);
1153 adx 285 va_end(args);
1154 adx 30 }
1155 adx 285
1156     va_start(args, pattern);
1157 adx 30 len_nick = ircsprintf(buf_nick, ":%s KILL %s :", me.name, source_p->name);
1158     len_nick += send_format(&buf_nick[len_nick], IRCD_BUFSIZE - len_nick, pattern,
1159     args);
1160     va_end(args);
1161    
1162     DLINK_FOREACH(ptr, serv_list.head)
1163     {
1164 michael 885 struct Client *client_p = ptr->data;
1165 adx 30
1166     if (one != NULL && (client_p == one->from))
1167     continue;
1168     if (IsDefunct(client_p))
1169     continue;
1170    
1171 michael 885 if (have_uid && IsCapable(client_p, CAP_TS6))
1172     send_message(client_p, buf_uid, len_uid);
1173     else
1174     send_message(client_p, buf_nick, len_nick);
1175 adx 30 }
1176     }

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