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Revision 3023 - (show annotations)
Mon Feb 24 20:41:35 2014 UTC (8 years, 5 months ago) by michael
File MIME type: text/x-chdr
File size: 24936 byte(s)
- Moved "struct config_channel_entry ConfigChannel" from channel.c to conf.c

1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2014 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19 * USA
20 */
21
22 /*! \file channel.c
23 * \brief Responsible for managing channels, members, bans and topics
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "channel.h"
30 #include "channel_mode.h"
31 #include "client.h"
32 #include "hash.h"
33 #include "conf.h"
34 #include "hostmask.h"
35 #include "irc_string.h"
36 #include "ircd.h"
37 #include "numeric.h"
38 #include "s_serv.h"
39 #include "send.h"
40 #include "event.h"
41 #include "memory.h"
42 #include "mempool.h"
43 #include "s_misc.h"
44 #include "resv.h"
45
46 dlink_list global_channel_list = { NULL, NULL, 0 };
47 mp_pool_t *ban_pool; /*! \todo ban_pool shouldn't be a global var */
48
49 static mp_pool_t *member_pool = NULL;
50 static mp_pool_t *channel_pool = NULL;
51
52 static char buf[IRCD_BUFSIZE];
53 static char modebuf[MODEBUFLEN];
54 static char parabuf[MODEBUFLEN];
55
56
57 /*! \brief Initializes the channel blockheap, adds known channel CAPAB
58 */
59 void
60 channel_init(void)
61 {
62 add_capability("EX", CAP_EX, 1);
63 add_capability("IE", CAP_IE, 1);
64 add_capability("CHW", CAP_CHW, 1);
65
66 channel_pool = mp_pool_new(sizeof(struct Channel), MP_CHUNK_SIZE_CHANNEL);
67 ban_pool = mp_pool_new(sizeof(struct Ban), MP_CHUNK_SIZE_BAN);
68 member_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_MEMBER);
69 }
70
71 /*! \brief adds a user to a channel by adding another link to the
72 * channels member chain.
73 * \param chptr pointer to channel to add client to
74 * \param who pointer to client (who) to add
75 * \param flags flags for chanops etc
76 * \param flood_ctrl whether to count this join in flood calculations
77 */
78 void
79 add_user_to_channel(struct Channel *chptr, struct Client *who,
80 unsigned int flags, int flood_ctrl)
81 {
82 struct Membership *ms = NULL;
83
84 if (GlobalSetOptions.joinfloodtime > 0)
85 {
86 if (flood_ctrl)
87 chptr->number_joined++;
88
89 chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
90 (((float)GlobalSetOptions.joinfloodcount) /
91 (float)GlobalSetOptions.joinfloodtime);
92
93 if (chptr->number_joined <= 0)
94 {
95 chptr->number_joined = 0;
96 ClearJoinFloodNoticed(chptr);
97 }
98 else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
99 {
100 chptr->number_joined = GlobalSetOptions.joinfloodcount;
101
102 if (!IsSetJoinFloodNoticed(chptr))
103 {
104 SetJoinFloodNoticed(chptr);
105 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
106 "Possible Join Flooder %s on %s target: %s",
107 get_client_name(who, HIDE_IP),
108 who->servptr->name, chptr->chname);
109 }
110 }
111
112 chptr->last_join_time = CurrentTime;
113 }
114
115 ms = mp_pool_get(member_pool);
116 memset(ms, 0, sizeof(*ms));
117
118 ms->client_p = who;
119 ms->chptr = chptr;
120 ms->flags = flags;
121
122 dlinkAdd(ms, &ms->channode, &chptr->members);
123 dlinkAdd(ms, &ms->usernode, &who->channel);
124 }
125
126 /*! \brief deletes an user from a channel by removing a link in the
127 * channels member chain.
128 * \param member pointer to Membership struct
129 */
130 void
131 remove_user_from_channel(struct Membership *member)
132 {
133 struct Client *client_p = member->client_p;
134 struct Channel *chptr = member->chptr;
135
136 dlinkDelete(&member->channode, &chptr->members);
137 dlinkDelete(&member->usernode, &client_p->channel);
138
139 mp_pool_release(member);
140
141 if (chptr->members.head == NULL)
142 destroy_channel(chptr);
143 }
144
145 /* send_members()
146 *
147 * inputs -
148 * output - NONE
149 * side effects -
150 */
151 static void
152 send_members(struct Client *client_p, struct Channel *chptr,
153 char *lmodebuf, char *lparabuf)
154 {
155 const dlink_node *ptr = NULL;
156 int tlen; /* length of text to append */
157 char *t, *start; /* temp char pointer */
158
159 start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %lu %s %s %s:",
160 ID_or_name(&me, client_p),
161 (unsigned long)chptr->channelts,
162 chptr->chname, lmodebuf, lparabuf);
163
164 DLINK_FOREACH(ptr, chptr->members.head)
165 {
166 const struct Membership *ms = ptr->data;
167
168 tlen = strlen(IsCapable(client_p, CAP_TS6) ?
169 ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
170
171 if (ms->flags & CHFL_CHANOP)
172 tlen++;
173 #ifdef HALFOPS
174 else if (ms->flags & CHFL_HALFOP)
175 tlen++;
176 #endif
177 if (ms->flags & CHFL_VOICE)
178 tlen++;
179
180 /* space will be converted into CR, but we also need space for LF..
181 * That's why we use '- 1' here
182 * -adx */
183 if (t + tlen - buf > IRCD_BUFSIZE - 1)
184 {
185 *(t - 1) = '\0'; /* kill the space and terminate the string */
186 sendto_one(client_p, "%s", buf);
187 t = start;
188 }
189
190 if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
191 *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
192 '%' : '@';
193 if ((ms->flags & CHFL_VOICE))
194 *t++ = '+';
195
196 if (IsCapable(client_p, CAP_TS6))
197 strcpy(t, ID(ms->client_p));
198 else
199 strcpy(t, ms->client_p->name);
200 t += strlen(t);
201 *t++ = ' ';
202 }
203
204 /* should always be non-NULL unless we have a kind of persistent channels */
205 if (chptr->members.head != NULL)
206 t--; /* take the space out */
207 *t = '\0';
208 sendto_one(client_p, "%s", buf);
209 }
210
211 /*! \brief sends +b/+e/+I
212 * \param client_p client pointer to server
213 * \param chptr pointer to channel
214 * \param top pointer to top of mode link list to send
215 * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
216 */
217 static void
218 send_mode_list(struct Client *client_p, struct Channel *chptr,
219 const dlink_list *top, char flag)
220 {
221 int ts5 = !IsCapable(client_p, CAP_TS6);
222 const dlink_node *lp = NULL;
223 char pbuf[IRCD_BUFSIZE];
224 int tlen, mlen, cur_len, count = 0;
225 char *mp = NULL, *pp = pbuf;
226
227 if (top == NULL || top->length == 0)
228 return;
229
230 if (ts5)
231 mlen = snprintf(buf, sizeof(buf), ":%s MODE %s +", me.name, chptr->chname);
232 else
233 mlen = snprintf(buf, sizeof(buf), ":%s BMASK %lu %s %c :", me.id,
234 (unsigned long)chptr->channelts, chptr->chname, flag);
235
236 /* MODE needs additional one byte for space between buf and pbuf */
237 cur_len = mlen + ts5;
238 mp = buf + mlen;
239
240 DLINK_FOREACH(lp, top->head)
241 {
242 const struct Ban *banptr = lp->data;
243
244 /* must add another b/e/I letter if we use MODE */
245 tlen = banptr->len + 3 + ts5;
246
247 /*
248 * send buffer and start over if we cannot fit another ban,
249 * or if the target is non-ts6 and we have too many modes in
250 * in this line.
251 */
252 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
253 (!IsCapable(client_p, CAP_TS6) &&
254 (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
255 {
256 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
257 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
258
259 cur_len = mlen + ts5;
260 mp = buf + mlen;
261 pp = pbuf;
262 count = 0;
263 }
264
265 count++;
266 if (ts5)
267 {
268 *mp++ = flag;
269 *mp = '\0';
270 }
271
272 pp += sprintf(pp, "%s!%s@%s ", banptr->name, banptr->user,
273 banptr->host);
274 cur_len += tlen;
275 }
276
277 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
278 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
279 }
280
281 /*! \brief send "client_p" a full list of the modes for channel chptr
282 * \param client_p pointer to client client_p
283 * \param chptr pointer to channel pointer
284 */
285 void
286 send_channel_modes(struct Client *client_p, struct Channel *chptr)
287 {
288 *modebuf = *parabuf = '\0';
289 channel_modes(chptr, client_p, modebuf, parabuf);
290 send_members(client_p, chptr, modebuf, parabuf);
291
292 send_mode_list(client_p, chptr, &chptr->banlist, 'b');
293 send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
294 send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
295 }
296
297 /*! \brief check channel name for invalid characters
298 * \param name pointer to channel name string
299 * \param local indicates whether it's a local or remote creation
300 * \return 0 if invalid, 1 otherwise
301 */
302 int
303 check_channel_name(const char *name, const int local)
304 {
305 const char *p = name;
306 const int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN;
307 assert(name != NULL);
308
309 if (!IsChanPrefix(*p))
310 return 0;
311
312 if (!local || !ConfigChannel.disable_fake_channels)
313 {
314 while (*++p)
315 if (!IsChanChar(*p))
316 return 0;
317 }
318 else
319 {
320 while (*++p)
321 if (!IsVisibleChanChar(*p))
322 return 0;
323 }
324
325 return p - name <= max_length;
326 }
327
328 void
329 remove_ban(struct Ban *bptr, dlink_list *list)
330 {
331 dlinkDelete(&bptr->node, list);
332
333 MyFree(bptr->name);
334 MyFree(bptr->user);
335 MyFree(bptr->host);
336 MyFree(bptr->who);
337
338 mp_pool_release(bptr);
339 }
340
341 /* free_channel_list()
342 *
343 * inputs - pointer to dlink_list
344 * output - NONE
345 * side effects -
346 */
347 void
348 free_channel_list(dlink_list *list)
349 {
350 dlink_node *ptr = NULL, *next_ptr = NULL;
351
352 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
353 remove_ban(ptr->data, list);
354
355 assert(list->tail == NULL && list->head == NULL);
356 }
357
358 /*! \brief Get Channel block for chname (and allocate a new channel
359 * block, if it didn't exist before)
360 * \param chname channel name
361 * \return channel block
362 */
363 struct Channel *
364 make_channel(const char *chname)
365 {
366 struct Channel *chptr = NULL;
367
368 assert(!EmptyString(chname));
369
370 chptr = mp_pool_get(channel_pool);
371
372 memset(chptr, 0, sizeof(*chptr));
373
374 /* doesn't hurt to set it here */
375 chptr->channelts = CurrentTime;
376 chptr->last_join_time = CurrentTime;
377
378 strlcpy(chptr->chname, chname, sizeof(chptr->chname));
379 dlinkAdd(chptr, &chptr->node, &global_channel_list);
380
381 hash_add_channel(chptr);
382
383 return chptr;
384 }
385
386 /*! \brief walk through this channel, and destroy it.
387 * \param chptr channel pointer
388 */
389 void
390 destroy_channel(struct Channel *chptr)
391 {
392 dlink_node *ptr = NULL, *ptr_next = NULL;
393
394 DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
395 del_invite(chptr, ptr->data);
396
397 /* free ban/exception/invex lists */
398 free_channel_list(&chptr->banlist);
399 free_channel_list(&chptr->exceptlist);
400 free_channel_list(&chptr->invexlist);
401
402 dlinkDelete(&chptr->node, &global_channel_list);
403 hash_del_channel(chptr);
404
405 mp_pool_release(chptr);
406 }
407
408 /*!
409 * \param chptr pointer to channel
410 * \return string pointer "=" if public, "@" if secret else "*"
411 */
412 static const char *
413 channel_pub_or_secret(const struct Channel *chptr)
414 {
415 if (SecretChannel(chptr))
416 return "@";
417 if (PrivateChannel(chptr))
418 return "*";
419 return "=";
420 }
421
422 /*! \brief lists all names on given channel
423 * \param source_p pointer to client struct requesting names
424 * \param chptr pointer to channel block
425 * \param show_eon show ENDOFNAMES numeric or not
426 * (don't want it with /names with no params)
427 */
428 void
429 channel_member_names(struct Client *source_p, struct Channel *chptr,
430 int show_eon)
431 {
432 const dlink_node *ptr = NULL;
433 char lbuf[IRCD_BUFSIZE + 1];
434 char *t = NULL, *start = NULL;
435 int tlen = 0;
436 int is_member = IsMember(source_p, chptr);
437 int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0;
438 int uhnames = HasCap(source_p, CAP_UHNAMES) != 0;
439
440 if (PubChannel(chptr) || is_member)
441 {
442 t = lbuf + snprintf(lbuf, sizeof(lbuf), form_str(RPL_NAMREPLY),
443 me.name, source_p->name,
444 channel_pub_or_secret(chptr), chptr->chname);
445 start = t;
446
447 DLINK_FOREACH(ptr, chptr->members.head)
448 {
449 const struct Membership *ms = ptr->data;
450
451 if (HasUMode(ms->client_p, UMODE_INVISIBLE) && !is_member)
452 continue;
453
454 if (!uhnames)
455 tlen = strlen(ms->client_p->name) + 1; /* nick + space */
456 else
457 tlen = strlen(ms->client_p->name) + strlen(ms->client_p->username) +
458 strlen(ms->client_p->host) + 3;
459
460 if (!multi_prefix)
461 {
462 if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
463 ++tlen;
464 }
465 else
466 {
467 if (ms->flags & CHFL_CHANOP)
468 ++tlen;
469 if (ms->flags & CHFL_HALFOP)
470 ++tlen;
471 if (ms->flags & CHFL_VOICE)
472 ++tlen;
473 }
474
475 if (t + tlen - lbuf > IRCD_BUFSIZE - 2)
476 {
477 *(t - 1) = '\0';
478 sendto_one(source_p, "%s", lbuf);
479 t = start;
480 }
481
482 if (!uhnames)
483 t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
484 ms->client_p->name);
485 else
486 t += sprintf(t, "%s%s!%s@%s ", get_member_status(ms, multi_prefix),
487 ms->client_p->name, ms->client_p->username,
488 ms->client_p->host);
489 }
490
491 if (tlen != 0)
492 {
493 *(t - 1) = '\0';
494 sendto_one(source_p, "%s", lbuf);
495 }
496 }
497
498 if (show_eon)
499 sendto_one(source_p, form_str(RPL_ENDOFNAMES), me.name,
500 source_p->name, chptr->chname);
501 }
502
503 /*! \brief adds client to invite list
504 * \param chptr pointer to channel block
505 * \param who pointer to client to add invite to
506 */
507 void
508 add_invite(struct Channel *chptr, struct Client *who)
509 {
510 del_invite(chptr, who);
511
512 /*
513 * delete last link in chain if the list is max length
514 */
515 if (dlink_list_length(&who->localClient->invited) >=
516 ConfigChannel.max_chans_per_user)
517 del_invite(who->localClient->invited.tail->data, who);
518
519 /* add client to channel invite list */
520 dlinkAdd(who, make_dlink_node(), &chptr->invites);
521
522 /* add channel to the end of the client invite list */
523 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
524 }
525
526 /*! \brief Delete Invite block from channel invite list
527 * and client invite list
528 * \param chptr pointer to Channel struct
529 * \param who pointer to client to remove invites from
530 */
531 void
532 del_invite(struct Channel *chptr, struct Client *who)
533 {
534 dlink_node *ptr = NULL;
535
536 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
537 free_dlink_node(ptr);
538
539 if ((ptr = dlinkFindDelete(&chptr->invites, who)))
540 free_dlink_node(ptr);
541 }
542
543 /* get_member_status()
544 *
545 * inputs - pointer to struct Membership
546 * - YES if we can combine different flags
547 * output - string either @, +, % or "" depending on whether
548 * chanop, voiced or user
549 * side effects -
550 *
551 * NOTE: Returned string is usually a static buffer
552 * (like in get_client_name)
553 */
554 const char *
555 get_member_status(const struct Membership *ms, const int combine)
556 {
557 static char buffer[4];
558 char *p = buffer;
559
560 if (ms->flags & CHFL_CHANOP)
561 {
562 if (!combine)
563 return "@";
564 *p++ = '@';
565 }
566
567 #ifdef HALFOPS
568 if (ms->flags & CHFL_HALFOP)
569 {
570 if (!combine)
571 return "%";
572 *p++ = '%';
573 }
574 #endif
575
576 if (ms->flags & CHFL_VOICE)
577 *p++ = '+';
578 *p = '\0';
579
580 return buffer;
581 }
582
583 /*!
584 * \param who pointer to Client to check
585 * \param list pointer to ban list to search
586 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
587 *
588 */
589 static int
590 find_bmask(const struct Client *who, const dlink_list *const list)
591 {
592 const dlink_node *ptr = NULL;
593
594 DLINK_FOREACH(ptr, list->head)
595 {
596 const struct Ban *bp = ptr->data;
597
598 if (!match(bp->name, who->name) && !match(bp->user, who->username))
599 {
600 switch (bp->type)
601 {
602 case HM_HOST:
603 if (!match(bp->host, who->host) || !match(bp->host, who->sockhost))
604 return 1;
605 break;
606 case HM_IPV4:
607 if (who->localClient->aftype == AF_INET)
608 if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
609 return 1;
610 break;
611 #ifdef IPV6
612 case HM_IPV6:
613 if (who->localClient->aftype == AF_INET6)
614 if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
615 return 1;
616 break;
617 #endif
618 default:
619 assert(0);
620 }
621 }
622 }
623
624 return 0;
625 }
626
627 /*!
628 * \param chptr pointer to channel block
629 * \param who pointer to client to check access fo
630 * \return 0 if not banned, 1 otherwise
631 */
632 int
633 is_banned(const struct Channel *chptr, const struct Client *who)
634 {
635 if (find_bmask(who, &chptr->banlist))
636 if (!find_bmask(who, &chptr->exceptlist))
637 return 1;
638
639 return 0;
640 }
641
642 /*!
643 * \param source_p pointer to client attempting to join
644 * \param chptr pointer to channel
645 * \param key key sent by client attempting to join if present
646 * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
647 * or 0 if allowed to join.
648 */
649 int
650 can_join(struct Client *source_p, struct Channel *chptr, const char *key)
651 {
652 if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL))
653 return ERR_SSLONLYCHAN;
654
655 if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED))
656 return ERR_NEEDREGGEDNICK;
657
658 if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER))
659 return ERR_OPERONLYCHAN;
660
661 if (chptr->mode.mode & MODE_INVITEONLY)
662 if (!dlinkFind(&source_p->localClient->invited, chptr))
663 if (!find_bmask(source_p, &chptr->invexlist))
664 return ERR_INVITEONLYCHAN;
665
666 if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
667 return ERR_BADCHANNELKEY;
668
669 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
670 chptr->mode.limit)
671 return ERR_CHANNELISFULL;
672
673 if (is_banned(chptr, source_p))
674 return ERR_BANNEDFROMCHAN;
675
676 return 0;
677 }
678
679 int
680 has_member_flags(const struct Membership *ms, const unsigned int flags)
681 {
682 if (ms != NULL)
683 return ms->flags & flags;
684 return 0;
685 }
686
687 struct Membership *
688 find_channel_link(struct Client *client_p, struct Channel *chptr)
689 {
690 dlink_node *ptr = NULL;
691
692 if (!IsClient(client_p))
693 return NULL;
694
695 if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel))
696 {
697 DLINK_FOREACH(ptr, chptr->members.head)
698 if (((struct Membership *)ptr->data)->client_p == client_p)
699 return ptr->data;
700 }
701 else
702 {
703 DLINK_FOREACH(ptr, client_p->channel.head)
704 if (((struct Membership *)ptr->data)->chptr == chptr)
705 return ptr->data;
706 }
707
708 return NULL;
709 }
710
711 /*
712 * Basically the same functionality as in bahamut
713 */
714 static int
715 msg_has_ctrls(const char *message)
716 {
717 const unsigned char *p = (const unsigned char *)message;
718
719 for (; *p; ++p)
720 {
721 if (*p > 31 || *p == 1)
722 continue;
723
724 if (*p == 27)
725 {
726 if (*(p + 1) == '$' ||
727 *(p + 1) == '(')
728 {
729 ++p;
730 continue;
731 }
732 }
733
734 return 1;
735 }
736
737 return 0;
738 }
739
740 /*!
741 * \param chptr pointer to Channel struct
742 * \param source_p pointer to Client struct
743 * \param ms pointer to Membership struct (can be NULL)
744 * \return CAN_SEND_OPV if op or voiced on channel\n
745 * CAN_SEND_NONOP if can send to channel but is not an op\n
746 * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
747 */
748 int
749 can_send(struct Channel *chptr, struct Client *source_p,
750 struct Membership *ms, const char *message)
751 {
752 struct MaskItem *conf = NULL;
753
754 if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
755 return CAN_SEND_OPV;
756
757 if (MyClient(source_p) && !IsExemptResv(source_p))
758 if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv))
759 if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf))
760 return ERR_CANNOTSENDTOCHAN;
761
762 if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message))
763 return ERR_NOCTRLSONCHAN;
764 if (ms || (ms = find_channel_link(source_p, chptr)))
765 if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
766 return CAN_SEND_OPV;
767 if (!ms && (chptr->mode.mode & MODE_NOPRIVMSGS))
768 return ERR_CANNOTSENDTOCHAN;
769 if (chptr->mode.mode & MODE_MODERATED)
770 return ERR_CANNOTSENDTOCHAN;
771 if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED))
772 return ERR_NEEDREGGEDNICK;
773
774 /* cache can send if banned */
775 if (MyClient(source_p))
776 {
777 if (ms)
778 {
779 if (ms->flags & CHFL_BAN_SILENCED)
780 return ERR_CANNOTSENDTOCHAN;
781
782 if (!(ms->flags & CHFL_BAN_CHECKED))
783 {
784 if (is_banned(chptr, source_p))
785 {
786 ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
787 return ERR_CANNOTSENDTOCHAN;
788 }
789
790 ms->flags |= CHFL_BAN_CHECKED;
791 }
792 }
793 else if (is_banned(chptr, source_p))
794 return ERR_CANNOTSENDTOCHAN;
795 }
796
797 return CAN_SEND_NONOP;
798 }
799
800 /*! \brief Updates the client's oper_warn_count_down, warns the
801 * IRC operators if necessary, and updates
802 * join_leave_countdown as needed.
803 * \param source_p pointer to struct Client to check
804 * \param name channel name or NULL if this is a part.
805 */
806 void
807 check_spambot_warning(struct Client *source_p, const char *name)
808 {
809 int t_delta = 0;
810 int decrement_count = 0;
811
812 if ((GlobalSetOptions.spam_num &&
813 (source_p->localClient->join_leave_count >=
814 GlobalSetOptions.spam_num)))
815 {
816 if (source_p->localClient->oper_warn_count_down > 0)
817 source_p->localClient->oper_warn_count_down--;
818 else
819 source_p->localClient->oper_warn_count_down = 0;
820
821 if (source_p->localClient->oper_warn_count_down == 0)
822 {
823 /* Its already known as a possible spambot */
824 if (name != NULL)
825 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
826 "User %s (%s@%s) trying to join %s is a possible spambot",
827 source_p->name, source_p->username,
828 source_p->host, name);
829 else
830 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
831 "User %s (%s@%s) is a possible spambot",
832 source_p->name, source_p->username,
833 source_p->host);
834 source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
835 }
836 }
837 else
838 {
839 if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
840 JOIN_LEAVE_COUNT_EXPIRE_TIME)
841 {
842 decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
843 if (decrement_count > source_p->localClient->join_leave_count)
844 source_p->localClient->join_leave_count = 0;
845 else
846 source_p->localClient->join_leave_count -= decrement_count;
847 }
848 else
849 {
850 if ((CurrentTime - (source_p->localClient->last_join_time)) <
851 GlobalSetOptions.spam_time)
852 {
853 /* oh, its a possible spambot */
854 source_p->localClient->join_leave_count++;
855 }
856 }
857
858 if (name != NULL)
859 source_p->localClient->last_join_time = CurrentTime;
860 else
861 source_p->localClient->last_leave_time = CurrentTime;
862 }
863 }
864
865 /*! \brief compares usercount and servercount against their split
866 * values and adjusts splitmode accordingly
867 * \param unused Unused address pointer
868 */
869 void
870 check_splitmode(void *unused)
871 {
872 if (splitchecking && (ConfigChannel.no_join_on_split ||
873 ConfigChannel.no_create_on_split))
874 {
875 const unsigned int server = dlink_list_length(&global_serv_list);
876
877 if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
878 {
879 splitmode = 1;
880
881 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
882 "Network split, activating splitmode");
883 eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
884 }
885 else if (splitmode && (server > split_servers) && (Count.total > split_users))
886 {
887 splitmode = 0;
888
889 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
890 "Network rejoined, deactivating splitmode");
891 eventDelete(check_splitmode, NULL);
892 }
893 }
894 }
895
896 /*! \brief Sets the channel topic for chptr
897 * \param chptr Pointer to struct Channel
898 * \param topic The topic string
899 * \param topic_info n!u\@h formatted string of the topic setter
900 * \param topicts timestamp on the topic
901 */
902 void
903 set_channel_topic(struct Channel *chptr, const char *topic,
904 const char *topic_info, time_t topicts, int local)
905 {
906 if (local)
907 strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ServerInfo.max_topic_length + 1));
908 else
909 strlcpy(chptr->topic, topic, sizeof(chptr->topic));
910
911 strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
912 chptr->topic_time = topicts;
913 }

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