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Contents of /ircd-hybrid/branches/8.1.x/src/channel.c

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Revision 2944 - (show annotations)
Sun Jan 26 15:43:04 2014 UTC (8 years, 6 months ago) by michael
File MIME type: text/x-chdr
File size: 24979 byte(s)
- channel_mode.c, channel.c: removed unused header include

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 struct config_channel_entry ConfigChannel;
47 dlink_list global_channel_list = { NULL, NULL, 0 };
48 mp_pool_t *ban_pool; /*! \todo ban_pool shouldn't be a global var */
49
50 static mp_pool_t *member_pool = NULL;
51 static mp_pool_t *channel_pool = NULL;
52
53 static char buf[IRCD_BUFSIZE];
54 static char modebuf[MODEBUFLEN];
55 static char parabuf[MODEBUFLEN];
56
57
58 /*! \brief Initializes the channel blockheap, adds known channel CAPAB
59 */
60 void
61 channel_init(void)
62 {
63 add_capability("EX", CAP_EX, 1);
64 add_capability("IE", CAP_IE, 1);
65 add_capability("CHW", CAP_CHW, 1);
66
67 channel_pool = mp_pool_new(sizeof(struct Channel), MP_CHUNK_SIZE_CHANNEL);
68 ban_pool = mp_pool_new(sizeof(struct Ban), MP_CHUNK_SIZE_BAN);
69 member_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_MEMBER);
70 }
71
72 /*! \brief adds a user to a channel by adding another link to the
73 * channels member chain.
74 * \param chptr pointer to channel to add client to
75 * \param who pointer to client (who) to add
76 * \param flags flags for chanops etc
77 * \param flood_ctrl whether to count this join in flood calculations
78 */
79 void
80 add_user_to_channel(struct Channel *chptr, struct Client *who,
81 unsigned int flags, int flood_ctrl)
82 {
83 struct Membership *ms = NULL;
84
85 if (GlobalSetOptions.joinfloodtime > 0)
86 {
87 if (flood_ctrl)
88 chptr->number_joined++;
89
90 chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
91 (((float)GlobalSetOptions.joinfloodcount) /
92 (float)GlobalSetOptions.joinfloodtime);
93
94 if (chptr->number_joined <= 0)
95 {
96 chptr->number_joined = 0;
97 ClearJoinFloodNoticed(chptr);
98 }
99 else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
100 {
101 chptr->number_joined = GlobalSetOptions.joinfloodcount;
102
103 if (!IsSetJoinFloodNoticed(chptr))
104 {
105 SetJoinFloodNoticed(chptr);
106 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
107 "Possible Join Flooder %s on %s target: %s",
108 get_client_name(who, HIDE_IP),
109 who->servptr->name, chptr->chname);
110 }
111 }
112
113 chptr->last_join_time = CurrentTime;
114 }
115
116 ms = mp_pool_get(member_pool);
117 memset(ms, 0, sizeof(*ms));
118
119 ms->client_p = who;
120 ms->chptr = chptr;
121 ms->flags = flags;
122
123 dlinkAdd(ms, &ms->channode, &chptr->members);
124 dlinkAdd(ms, &ms->usernode, &who->channel);
125 }
126
127 /*! \brief deletes an user from a channel by removing a link in the
128 * channels member chain.
129 * \param member pointer to Membership struct
130 */
131 void
132 remove_user_from_channel(struct Membership *member)
133 {
134 struct Client *client_p = member->client_p;
135 struct Channel *chptr = member->chptr;
136
137 dlinkDelete(&member->channode, &chptr->members);
138 dlinkDelete(&member->usernode, &client_p->channel);
139
140 mp_pool_release(member);
141
142 if (chptr->members.head == NULL)
143 destroy_channel(chptr);
144 }
145
146 /* send_members()
147 *
148 * inputs -
149 * output - NONE
150 * side effects -
151 */
152 static void
153 send_members(struct Client *client_p, struct Channel *chptr,
154 char *lmodebuf, char *lparabuf)
155 {
156 const dlink_node *ptr = NULL;
157 int tlen; /* length of text to append */
158 char *t, *start; /* temp char pointer */
159
160 start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %lu %s %s %s:",
161 ID_or_name(&me, client_p),
162 (unsigned long)chptr->channelts,
163 chptr->chname, lmodebuf, lparabuf);
164
165 DLINK_FOREACH(ptr, chptr->members.head)
166 {
167 const struct Membership *ms = ptr->data;
168
169 tlen = strlen(IsCapable(client_p, CAP_TS6) ?
170 ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
171
172 if (ms->flags & CHFL_CHANOP)
173 tlen++;
174 #ifdef HALFOPS
175 else if (ms->flags & CHFL_HALFOP)
176 tlen++;
177 #endif
178 if (ms->flags & CHFL_VOICE)
179 tlen++;
180
181 /* space will be converted into CR, but we also need space for LF..
182 * That's why we use '- 1' here
183 * -adx */
184 if (t + tlen - buf > IRCD_BUFSIZE - 1)
185 {
186 *(t - 1) = '\0'; /* kill the space and terminate the string */
187 sendto_one(client_p, "%s", buf);
188 t = start;
189 }
190
191 if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
192 *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
193 '%' : '@';
194 if ((ms->flags & CHFL_VOICE))
195 *t++ = '+';
196
197 if (IsCapable(client_p, CAP_TS6))
198 strcpy(t, ID(ms->client_p));
199 else
200 strcpy(t, ms->client_p->name);
201 t += strlen(t);
202 *t++ = ' ';
203 }
204
205 /* should always be non-NULL unless we have a kind of persistent channels */
206 if (chptr->members.head != NULL)
207 t--; /* take the space out */
208 *t = '\0';
209 sendto_one(client_p, "%s", buf);
210 }
211
212 /*! \brief sends +b/+e/+I
213 * \param client_p client pointer to server
214 * \param chptr pointer to channel
215 * \param top pointer to top of mode link list to send
216 * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
217 */
218 static void
219 send_mode_list(struct Client *client_p, struct Channel *chptr,
220 const dlink_list *top, char flag)
221 {
222 int ts5 = !IsCapable(client_p, CAP_TS6);
223 const dlink_node *lp = NULL;
224 char pbuf[IRCD_BUFSIZE];
225 int tlen, mlen, cur_len, count = 0;
226 char *mp = NULL, *pp = pbuf;
227
228 if (top == NULL || top->length == 0)
229 return;
230
231 if (ts5)
232 mlen = snprintf(buf, sizeof(buf), ":%s MODE %s +", me.name, chptr->chname);
233 else
234 mlen = snprintf(buf, sizeof(buf), ":%s BMASK %lu %s %c :", me.id,
235 (unsigned long)chptr->channelts, chptr->chname, flag);
236
237 /* MODE needs additional one byte for space between buf and pbuf */
238 cur_len = mlen + ts5;
239 mp = buf + mlen;
240
241 DLINK_FOREACH(lp, top->head)
242 {
243 const struct Ban *banptr = lp->data;
244
245 /* must add another b/e/I letter if we use MODE */
246 tlen = banptr->len + 3 + ts5;
247
248 /*
249 * send buffer and start over if we cannot fit another ban,
250 * or if the target is non-ts6 and we have too many modes in
251 * in this line.
252 */
253 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
254 (!IsCapable(client_p, CAP_TS6) &&
255 (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
256 {
257 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
258 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
259
260 cur_len = mlen + ts5;
261 mp = buf + mlen;
262 pp = pbuf;
263 count = 0;
264 }
265
266 count++;
267 if (ts5)
268 {
269 *mp++ = flag;
270 *mp = '\0';
271 }
272
273 pp += sprintf(pp, "%s!%s@%s ", banptr->name, banptr->user,
274 banptr->host);
275 cur_len += tlen;
276 }
277
278 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
279 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
280 }
281
282 /*! \brief send "client_p" a full list of the modes for channel chptr
283 * \param client_p pointer to client client_p
284 * \param chptr pointer to channel pointer
285 */
286 void
287 send_channel_modes(struct Client *client_p, struct Channel *chptr)
288 {
289 *modebuf = *parabuf = '\0';
290 channel_modes(chptr, client_p, modebuf, parabuf);
291 send_members(client_p, chptr, modebuf, parabuf);
292
293 send_mode_list(client_p, chptr, &chptr->banlist, 'b');
294 send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
295 send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
296 }
297
298 /*! \brief check channel name for invalid characters
299 * \param name pointer to channel name string
300 * \param local indicates whether it's a local or remote creation
301 * \return 0 if invalid, 1 otherwise
302 */
303 int
304 check_channel_name(const char *name, const int local)
305 {
306 const char *p = name;
307 const int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN;
308 assert(name != NULL);
309
310 if (!IsChanPrefix(*p))
311 return 0;
312
313 if (!local || !ConfigChannel.disable_fake_channels)
314 {
315 while (*++p)
316 if (!IsChanChar(*p))
317 return 0;
318 }
319 else
320 {
321 while (*++p)
322 if (!IsVisibleChanChar(*p))
323 return 0;
324 }
325
326 return p - name <= max_length;
327 }
328
329 void
330 remove_ban(struct Ban *bptr, dlink_list *list)
331 {
332 dlinkDelete(&bptr->node, list);
333
334 MyFree(bptr->name);
335 MyFree(bptr->user);
336 MyFree(bptr->host);
337 MyFree(bptr->who);
338
339 mp_pool_release(bptr);
340 }
341
342 /* free_channel_list()
343 *
344 * inputs - pointer to dlink_list
345 * output - NONE
346 * side effects -
347 */
348 void
349 free_channel_list(dlink_list *list)
350 {
351 dlink_node *ptr = NULL, *next_ptr = NULL;
352
353 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
354 remove_ban(ptr->data, list);
355
356 assert(list->tail == NULL && list->head == NULL);
357 }
358
359 /*! \brief Get Channel block for chname (and allocate a new channel
360 * block, if it didn't exist before)
361 * \param chname channel name
362 * \return channel block
363 */
364 struct Channel *
365 make_channel(const char *chname)
366 {
367 struct Channel *chptr = NULL;
368
369 assert(!EmptyString(chname));
370
371 chptr = mp_pool_get(channel_pool);
372
373 memset(chptr, 0, sizeof(*chptr));
374
375 /* doesn't hurt to set it here */
376 chptr->channelts = CurrentTime;
377 chptr->last_join_time = CurrentTime;
378
379 strlcpy(chptr->chname, chname, sizeof(chptr->chname));
380 dlinkAdd(chptr, &chptr->node, &global_channel_list);
381
382 hash_add_channel(chptr);
383
384 return chptr;
385 }
386
387 /*! \brief walk through this channel, and destroy it.
388 * \param chptr channel pointer
389 */
390 void
391 destroy_channel(struct Channel *chptr)
392 {
393 dlink_node *ptr = NULL, *ptr_next = NULL;
394
395 DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
396 del_invite(chptr, ptr->data);
397
398 /* free ban/exception/invex lists */
399 free_channel_list(&chptr->banlist);
400 free_channel_list(&chptr->exceptlist);
401 free_channel_list(&chptr->invexlist);
402
403 dlinkDelete(&chptr->node, &global_channel_list);
404 hash_del_channel(chptr);
405
406 mp_pool_release(chptr);
407 }
408
409 /*!
410 * \param chptr pointer to channel
411 * \return string pointer "=" if public, "@" if secret else "*"
412 */
413 static const char *
414 channel_pub_or_secret(const struct Channel *chptr)
415 {
416 if (SecretChannel(chptr))
417 return "@";
418 if (PrivateChannel(chptr))
419 return "*";
420 return "=";
421 }
422
423 /*! \brief lists all names on given channel
424 * \param source_p pointer to client struct requesting names
425 * \param chptr pointer to channel block
426 * \param show_eon show ENDOFNAMES numeric or not
427 * (don't want it with /names with no params)
428 */
429 void
430 channel_member_names(struct Client *source_p, struct Channel *chptr,
431 int show_eon)
432 {
433 const dlink_node *ptr = NULL;
434 char lbuf[IRCD_BUFSIZE + 1];
435 char *t = NULL, *start = NULL;
436 int tlen = 0;
437 int is_member = IsMember(source_p, chptr);
438 int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0;
439 int uhnames = HasCap(source_p, CAP_UHNAMES) != 0;
440
441 if (PubChannel(chptr) || is_member)
442 {
443 t = lbuf + snprintf(lbuf, sizeof(lbuf), form_str(RPL_NAMREPLY),
444 me.name, source_p->name,
445 channel_pub_or_secret(chptr), chptr->chname);
446 start = t;
447
448 DLINK_FOREACH(ptr, chptr->members.head)
449 {
450 const struct Membership *ms = ptr->data;
451
452 if (HasUMode(ms->client_p, UMODE_INVISIBLE) && !is_member)
453 continue;
454
455 if (!uhnames)
456 tlen = strlen(ms->client_p->name) + 1; /* nick + space */
457 else
458 tlen = strlen(ms->client_p->name) + strlen(ms->client_p->username) +
459 strlen(ms->client_p->host) + 3;
460
461 if (!multi_prefix)
462 {
463 if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
464 ++tlen;
465 }
466 else
467 {
468 if (ms->flags & CHFL_CHANOP)
469 ++tlen;
470 if (ms->flags & CHFL_HALFOP)
471 ++tlen;
472 if (ms->flags & CHFL_VOICE)
473 ++tlen;
474 }
475
476 if (t + tlen - lbuf > IRCD_BUFSIZE - 2)
477 {
478 *(t - 1) = '\0';
479 sendto_one(source_p, "%s", lbuf);
480 t = start;
481 }
482
483 if (!uhnames)
484 t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
485 ms->client_p->name);
486 else
487 t += sprintf(t, "%s%s!%s@%s ", get_member_status(ms, multi_prefix),
488 ms->client_p->name, ms->client_p->username,
489 ms->client_p->host);
490 }
491
492 if (tlen != 0)
493 {
494 *(t - 1) = '\0';
495 sendto_one(source_p, "%s", lbuf);
496 }
497 }
498
499 if (show_eon)
500 sendto_one(source_p, form_str(RPL_ENDOFNAMES), me.name,
501 source_p->name, chptr->chname);
502 }
503
504 /*! \brief adds client to invite list
505 * \param chptr pointer to channel block
506 * \param who pointer to client to add invite to
507 */
508 void
509 add_invite(struct Channel *chptr, struct Client *who)
510 {
511 del_invite(chptr, who);
512
513 /*
514 * delete last link in chain if the list is max length
515 */
516 if (dlink_list_length(&who->localClient->invited) >=
517 ConfigChannel.max_chans_per_user)
518 del_invite(who->localClient->invited.tail->data, who);
519
520 /* add client to channel invite list */
521 dlinkAdd(who, make_dlink_node(), &chptr->invites);
522
523 /* add channel to the end of the client invite list */
524 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
525 }
526
527 /*! \brief Delete Invite block from channel invite list
528 * and client invite list
529 * \param chptr pointer to Channel struct
530 * \param who pointer to client to remove invites from
531 */
532 void
533 del_invite(struct Channel *chptr, struct Client *who)
534 {
535 dlink_node *ptr = NULL;
536
537 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
538 free_dlink_node(ptr);
539
540 if ((ptr = dlinkFindDelete(&chptr->invites, who)))
541 free_dlink_node(ptr);
542 }
543
544 /* get_member_status()
545 *
546 * inputs - pointer to struct Membership
547 * - YES if we can combine different flags
548 * output - string either @, +, % or "" depending on whether
549 * chanop, voiced or user
550 * side effects -
551 *
552 * NOTE: Returned string is usually a static buffer
553 * (like in get_client_name)
554 */
555 const char *
556 get_member_status(const struct Membership *ms, const int combine)
557 {
558 static char buffer[4];
559 char *p = buffer;
560
561 if (ms->flags & CHFL_CHANOP)
562 {
563 if (!combine)
564 return "@";
565 *p++ = '@';
566 }
567
568 #ifdef HALFOPS
569 if (ms->flags & CHFL_HALFOP)
570 {
571 if (!combine)
572 return "%";
573 *p++ = '%';
574 }
575 #endif
576
577 if (ms->flags & CHFL_VOICE)
578 *p++ = '+';
579 *p = '\0';
580
581 return buffer;
582 }
583
584 /*!
585 * \param who pointer to Client to check
586 * \param list pointer to ban list to search
587 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
588 *
589 */
590 static int
591 find_bmask(const struct Client *who, const dlink_list *const list)
592 {
593 const dlink_node *ptr = NULL;
594
595 DLINK_FOREACH(ptr, list->head)
596 {
597 const struct Ban *bp = ptr->data;
598
599 if (!match(bp->name, who->name) && !match(bp->user, who->username))
600 {
601 switch (bp->type)
602 {
603 case HM_HOST:
604 if (!match(bp->host, who->host) || !match(bp->host, who->sockhost))
605 return 1;
606 break;
607 case HM_IPV4:
608 if (who->localClient->aftype == AF_INET)
609 if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
610 return 1;
611 break;
612 #ifdef IPV6
613 case HM_IPV6:
614 if (who->localClient->aftype == AF_INET6)
615 if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
616 return 1;
617 break;
618 #endif
619 default:
620 assert(0);
621 }
622 }
623 }
624
625 return 0;
626 }
627
628 /*!
629 * \param chptr pointer to channel block
630 * \param who pointer to client to check access fo
631 * \return 0 if not banned, 1 otherwise
632 */
633 int
634 is_banned(const struct Channel *chptr, const struct Client *who)
635 {
636 if (find_bmask(who, &chptr->banlist))
637 if (!find_bmask(who, &chptr->exceptlist))
638 return 1;
639
640 return 0;
641 }
642
643 /*!
644 * \param source_p pointer to client attempting to join
645 * \param chptr pointer to channel
646 * \param key key sent by client attempting to join if present
647 * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
648 * or 0 if allowed to join.
649 */
650 int
651 can_join(struct Client *source_p, struct Channel *chptr, const char *key)
652 {
653 if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL))
654 return ERR_SSLONLYCHAN;
655
656 if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED))
657 return ERR_NEEDREGGEDNICK;
658
659 if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER))
660 return ERR_OPERONLYCHAN;
661
662 if (chptr->mode.mode & MODE_INVITEONLY)
663 if (!dlinkFind(&source_p->localClient->invited, chptr))
664 if (!find_bmask(source_p, &chptr->invexlist))
665 return ERR_INVITEONLYCHAN;
666
667 if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
668 return ERR_BADCHANNELKEY;
669
670 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
671 chptr->mode.limit)
672 return ERR_CHANNELISFULL;
673
674 if (is_banned(chptr, source_p))
675 return ERR_BANNEDFROMCHAN;
676
677 return 0;
678 }
679
680 int
681 has_member_flags(const struct Membership *ms, const unsigned int flags)
682 {
683 if (ms != NULL)
684 return ms->flags & flags;
685 return 0;
686 }
687
688 struct Membership *
689 find_channel_link(struct Client *client_p, struct Channel *chptr)
690 {
691 dlink_node *ptr = NULL;
692
693 if (!IsClient(client_p))
694 return NULL;
695
696 if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel))
697 {
698 DLINK_FOREACH(ptr, chptr->members.head)
699 if (((struct Membership *)ptr->data)->client_p == client_p)
700 return ptr->data;
701 }
702 else
703 {
704 DLINK_FOREACH(ptr, client_p->channel.head)
705 if (((struct Membership *)ptr->data)->chptr == chptr)
706 return ptr->data;
707 }
708
709 return NULL;
710 }
711
712 /*
713 * Basically the same functionality as in bahamut
714 */
715 static int
716 msg_has_ctrls(const char *message)
717 {
718 const unsigned char *p = (const unsigned char *)message;
719
720 for (; *p; ++p)
721 {
722 if (*p > 31 || *p == 1)
723 continue;
724
725 if (*p == 27)
726 {
727 if (*(p + 1) == '$' ||
728 *(p + 1) == '(')
729 {
730 ++p;
731 continue;
732 }
733 }
734
735 return 1;
736 }
737
738 return 0;
739 }
740
741 /*!
742 * \param chptr pointer to Channel struct
743 * \param source_p pointer to Client struct
744 * \param ms pointer to Membership struct (can be NULL)
745 * \return CAN_SEND_OPV if op or voiced on channel\n
746 * CAN_SEND_NONOP if can send to channel but is not an op\n
747 * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
748 */
749 int
750 can_send(struct Channel *chptr, struct Client *source_p,
751 struct Membership *ms, const char *message)
752 {
753 struct MaskItem *conf = NULL;
754
755 if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
756 return CAN_SEND_OPV;
757
758 if (MyClient(source_p) && !IsExemptResv(source_p))
759 if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv))
760 if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf))
761 return ERR_CANNOTSENDTOCHAN;
762
763 if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message))
764 return ERR_NOCTRLSONCHAN;
765 if (ms || (ms = find_channel_link(source_p, chptr)))
766 if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
767 return CAN_SEND_OPV;
768 if (!ms && (chptr->mode.mode & MODE_NOPRIVMSGS))
769 return ERR_CANNOTSENDTOCHAN;
770 if (chptr->mode.mode & MODE_MODERATED)
771 return ERR_CANNOTSENDTOCHAN;
772 if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED))
773 return ERR_NEEDREGGEDNICK;
774
775 /* cache can send if banned */
776 if (MyClient(source_p))
777 {
778 if (ms)
779 {
780 if (ms->flags & CHFL_BAN_SILENCED)
781 return ERR_CANNOTSENDTOCHAN;
782
783 if (!(ms->flags & CHFL_BAN_CHECKED))
784 {
785 if (is_banned(chptr, source_p))
786 {
787 ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
788 return ERR_CANNOTSENDTOCHAN;
789 }
790
791 ms->flags |= CHFL_BAN_CHECKED;
792 }
793 }
794 else if (is_banned(chptr, source_p))
795 return ERR_CANNOTSENDTOCHAN;
796 }
797
798 return CAN_SEND_NONOP;
799 }
800
801 /*! \brief Updates the client's oper_warn_count_down, warns the
802 * IRC operators if necessary, and updates
803 * join_leave_countdown as needed.
804 * \param source_p pointer to struct Client to check
805 * \param name channel name or NULL if this is a part.
806 */
807 void
808 check_spambot_warning(struct Client *source_p, const char *name)
809 {
810 int t_delta = 0;
811 int decrement_count = 0;
812
813 if ((GlobalSetOptions.spam_num &&
814 (source_p->localClient->join_leave_count >=
815 GlobalSetOptions.spam_num)))
816 {
817 if (source_p->localClient->oper_warn_count_down > 0)
818 source_p->localClient->oper_warn_count_down--;
819 else
820 source_p->localClient->oper_warn_count_down = 0;
821
822 if (source_p->localClient->oper_warn_count_down == 0)
823 {
824 /* Its already known as a possible spambot */
825 if (name != NULL)
826 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
827 "User %s (%s@%s) trying to join %s is a possible spambot",
828 source_p->name, source_p->username,
829 source_p->host, name);
830 else
831 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
832 "User %s (%s@%s) is a possible spambot",
833 source_p->name, source_p->username,
834 source_p->host);
835 source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
836 }
837 }
838 else
839 {
840 if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
841 JOIN_LEAVE_COUNT_EXPIRE_TIME)
842 {
843 decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
844 if (decrement_count > source_p->localClient->join_leave_count)
845 source_p->localClient->join_leave_count = 0;
846 else
847 source_p->localClient->join_leave_count -= decrement_count;
848 }
849 else
850 {
851 if ((CurrentTime - (source_p->localClient->last_join_time)) <
852 GlobalSetOptions.spam_time)
853 {
854 /* oh, its a possible spambot */
855 source_p->localClient->join_leave_count++;
856 }
857 }
858
859 if (name != NULL)
860 source_p->localClient->last_join_time = CurrentTime;
861 else
862 source_p->localClient->last_leave_time = CurrentTime;
863 }
864 }
865
866 /*! \brief compares usercount and servercount against their split
867 * values and adjusts splitmode accordingly
868 * \param unused Unused address pointer
869 */
870 void
871 check_splitmode(void *unused)
872 {
873 if (splitchecking && (ConfigChannel.no_join_on_split ||
874 ConfigChannel.no_create_on_split))
875 {
876 const unsigned int server = dlink_list_length(&global_serv_list);
877
878 if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
879 {
880 splitmode = 1;
881
882 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
883 "Network split, activating splitmode");
884 eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
885 }
886 else if (splitmode && (server > split_servers) && (Count.total > split_users))
887 {
888 splitmode = 0;
889
890 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
891 "Network rejoined, deactivating splitmode");
892 eventDelete(check_splitmode, NULL);
893 }
894 }
895 }
896
897 /*! \brief Sets the channel topic for chptr
898 * \param chptr Pointer to struct Channel
899 * \param topic The topic string
900 * \param topic_info n!u\@h formatted string of the topic setter
901 * \param topicts timestamp on the topic
902 */
903 void
904 set_channel_topic(struct Channel *chptr, const char *topic,
905 const char *topic_info, time_t topicts, int local)
906 {
907 if (local)
908 strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ServerInfo.max_topic_length + 1));
909 else
910 strlcpy(chptr->topic, topic, sizeof(chptr->topic));
911
912 strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
913 chptr->topic_time = topicts;
914 }

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