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Revision 2415 - (show annotations)
Sun Jul 21 14:33:22 2013 UTC (6 years, 11 months ago) by michael
File MIME type: text/x-chdr
File size: 24284 byte(s)
- ioengine changes as of 21JUL13

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 *
4 * Copyright (C) 2002 by the past and present ircd coders, and others.
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" /* captab */
39 #include "s_user.h"
40 #include "send.h"
41 #include "ioengine.h"
42 #include "memory.h"
43 #include "mempool.h"
44 #include "s_misc.h"
45 #include "resv.h"
46
47 struct config_channel_entry ConfigChannel;
48 dlink_list global_channel_list = { NULL, NULL, 0 };
49 mp_pool_t *ban_pool; /*! \todo ban_pool shouldn't be a global var */
50
51 static mp_pool_t *member_pool = NULL;
52 static mp_pool_t *channel_pool = NULL;
53
54 static char buf[IRCD_BUFSIZE];
55 static char modebuf[MODEBUFLEN];
56 static char parabuf[MODEBUFLEN];
57
58
59 /*! \brief Initializes the channel blockheap, adds known channel CAPAB
60 */
61 void
62 channel_init(void)
63 {
64 add_capability("EX", CAP_EX, 1);
65 add_capability("IE", CAP_IE, 1);
66 add_capability("CHW", CAP_CHW, 1);
67
68 channel_pool = mp_pool_new(sizeof(struct Channel), MP_CHUNK_SIZE_CHANNEL);
69 ban_pool = mp_pool_new(sizeof(struct Ban), MP_CHUNK_SIZE_BAN);
70 member_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_MEMBER);
71 }
72
73 /*! \brief adds a user to a channel by adding another link to the
74 * channels member chain.
75 * \param chptr pointer to channel to add client to
76 * \param who pointer to client (who) to add
77 * \param flags flags for chanops etc
78 * \param flood_ctrl whether to count this join in flood calculations
79 */
80 void
81 add_user_to_channel(struct Channel *chptr, struct Client *who,
82 unsigned int flags, int flood_ctrl)
83 {
84 struct Membership *ms = NULL;
85
86 if (GlobalSetOptions.joinfloodtime > 0)
87 {
88 if (flood_ctrl)
89 chptr->number_joined++;
90
91 chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
92 (((float)GlobalSetOptions.joinfloodcount) /
93 (float)GlobalSetOptions.joinfloodtime);
94
95 if (chptr->number_joined <= 0)
96 {
97 chptr->number_joined = 0;
98 ClearJoinFloodNoticed(chptr);
99 }
100 else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
101 {
102 chptr->number_joined = GlobalSetOptions.joinfloodcount;
103
104 if (!IsSetJoinFloodNoticed(chptr))
105 {
106 SetJoinFloodNoticed(chptr);
107 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
108 "Possible Join Flooder %s on %s target: %s",
109 get_client_name(who, HIDE_IP),
110 who->servptr->name, chptr->chname);
111 }
112 }
113
114 chptr->last_join_time = CurrentTime;
115 }
116
117 ms = mp_pool_get(member_pool);
118 memset(ms, 0, sizeof(*ms));
119
120 ms->client_p = who;
121 ms->chptr = chptr;
122 ms->flags = flags;
123
124 dlinkAdd(ms, &ms->channode, &chptr->members);
125 dlinkAdd(ms, &ms->usernode, &who->channel);
126 }
127
128 /*! \brief deletes an user from a channel by removing a link in the
129 * channels member chain.
130 * \param member pointer to Membership struct
131 */
132 void
133 remove_user_from_channel(struct Membership *member)
134 {
135 struct Client *client_p = member->client_p;
136 struct Channel *chptr = member->chptr;
137
138 dlinkDelete(&member->channode, &chptr->members);
139 dlinkDelete(&member->usernode, &client_p->channel);
140
141 mp_pool_release(member);
142
143 if (chptr->members.head == NULL)
144 destroy_channel(chptr);
145 }
146
147 /* send_members()
148 *
149 * inputs -
150 * output - NONE
151 * side effects -
152 */
153 static void
154 send_members(struct Client *client_p, struct Channel *chptr,
155 char *lmodebuf, char *lparabuf)
156 {
157 const dlink_node *ptr = NULL;
158 int tlen; /* length of text to append */
159 char *t, *start; /* temp char pointer */
160
161 start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %lu %s %s %s:",
162 ID_or_name(&me, client_p),
163 (unsigned long)chptr->channelts,
164 chptr->chname, lmodebuf, lparabuf);
165
166 DLINK_FOREACH(ptr, chptr->members.head)
167 {
168 const struct Membership *ms = ptr->data;
169
170 tlen = strlen(IsCapable(client_p, CAP_TS6) ?
171 ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
172
173 if (ms->flags & CHFL_CHANOP)
174 tlen++;
175 #ifdef HALFOPS
176 else if (ms->flags & CHFL_HALFOP)
177 tlen++;
178 #endif
179 if (ms->flags & CHFL_VOICE)
180 tlen++;
181
182 /* space will be converted into CR, but we also need space for LF..
183 * That's why we use '- 1' here
184 * -adx */
185 if (t + tlen - buf > IRCD_BUFSIZE - 1)
186 {
187 *(t - 1) = '\0'; /* kill the space and terminate the string */
188 sendto_one(client_p, "%s", buf);
189 t = start;
190 }
191
192 if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
193 *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
194 '%' : '@';
195 if ((ms->flags & CHFL_VOICE))
196 *t++ = '+';
197
198 if (IsCapable(client_p, CAP_TS6))
199 strcpy(t, ID(ms->client_p));
200 else
201 strcpy(t, ms->client_p->name);
202 t += strlen(t);
203 *t++ = ' ';
204 }
205
206 /* should always be non-NULL unless we have a kind of persistent channels */
207 if (chptr->members.head != NULL)
208 t--; /* take the space out */
209 *t = '\0';
210 sendto_one(client_p, "%s", buf);
211 }
212
213 /*! \brief sends +b/+e/+I
214 * \param client_p client pointer to server
215 * \param chptr pointer to channel
216 * \param top pointer to top of mode link list to send
217 * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
218 */
219 static void
220 send_mode_list(struct Client *client_p, struct Channel *chptr,
221 const dlink_list *top, char flag)
222 {
223 int ts5 = !IsCapable(client_p, CAP_TS6);
224 const dlink_node *lp = NULL;
225 char pbuf[IRCD_BUFSIZE];
226 int tlen, mlen, cur_len, count = 0;
227 char *mp = NULL, *pp = pbuf;
228
229 if (top == NULL || top->length == 0)
230 return;
231
232 if (ts5)
233 mlen = snprintf(buf, sizeof(buf), ":%s MODE %s +", me.name, chptr->chname);
234 else
235 mlen = snprintf(buf, sizeof(buf), ":%s BMASK %lu %s %c :", me.id,
236 (unsigned long)chptr->channelts, chptr->chname, flag);
237
238 /* MODE needs additional one byte for space between buf and pbuf */
239 cur_len = mlen + ts5;
240 mp = buf + mlen;
241
242 DLINK_FOREACH(lp, top->head)
243 {
244 const struct Ban *banptr = lp->data;
245
246 /* must add another b/e/I letter if we use MODE */
247 tlen = banptr->len + 3 + ts5;
248
249 /*
250 * send buffer and start over if we cannot fit another ban,
251 * or if the target is non-ts6 and we have too many modes in
252 * in this line.
253 */
254 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
255 (!IsCapable(client_p, CAP_TS6) &&
256 (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
257 {
258 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
259 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
260
261 cur_len = mlen + ts5;
262 mp = buf + mlen;
263 pp = pbuf;
264 count = 0;
265 }
266
267 count++;
268 if (ts5)
269 {
270 *mp++ = flag;
271 *mp = '\0';
272 }
273
274 pp += sprintf(pp, "%s!%s@%s ", banptr->name, banptr->user,
275 banptr->host);
276 cur_len += tlen;
277 }
278
279 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
280 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
281 }
282
283 /*! \brief send "client_p" a full list of the modes for channel chptr
284 * \param client_p pointer to client client_p
285 * \param chptr pointer to channel pointer
286 */
287 void
288 send_channel_modes(struct Client *client_p, struct Channel *chptr)
289 {
290 *modebuf = *parabuf = '\0';
291 channel_modes(chptr, client_p, modebuf, parabuf);
292 send_members(client_p, chptr, modebuf, parabuf);
293
294 send_mode_list(client_p, chptr, &chptr->banlist, 'b');
295 send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
296 send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
297 }
298
299 /*! \brief check channel name for invalid characters
300 * \param name pointer to channel name string
301 * \param local indicates whether it's a local or remote creation
302 * \return 0 if invalid, 1 otherwise
303 */
304 int
305 check_channel_name(const char *name, const int local)
306 {
307 const char *p = name;
308 const int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN;
309 assert(name != NULL);
310
311 if (!IsChanPrefix(*p))
312 return 0;
313
314 if (!local || !ConfigChannel.disable_fake_channels)
315 {
316 while (*++p)
317 if (!IsChanChar(*p))
318 return 0;
319 }
320 else
321 {
322 while (*++p)
323 if (!IsVisibleChanChar(*p))
324 return 0;
325 }
326
327 return p - name <= max_length;
328 }
329
330 void
331 remove_ban(struct Ban *bptr, dlink_list *list)
332 {
333 dlinkDelete(&bptr->node, list);
334
335 MyFree(bptr->name);
336 MyFree(bptr->user);
337 MyFree(bptr->host);
338 MyFree(bptr->who);
339
340 mp_pool_release(bptr);
341 }
342
343 /* free_channel_list()
344 *
345 * inputs - pointer to dlink_list
346 * output - NONE
347 * side effects -
348 */
349 void
350 free_channel_list(dlink_list *list)
351 {
352 dlink_node *ptr = NULL, *next_ptr = NULL;
353
354 DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
355 remove_ban(ptr->data, list);
356
357 assert(list->tail == NULL && list->head == NULL);
358 }
359
360 /*! \brief Get Channel block for chname (and allocate a new channel
361 * block, if it didn't exist before)
362 * \param chname channel name
363 * \return channel block
364 */
365 struct Channel *
366 make_channel(const char *chname)
367 {
368 struct Channel *chptr = NULL;
369
370 assert(!EmptyString(chname));
371
372 chptr = mp_pool_get(channel_pool);
373
374 memset(chptr, 0, sizeof(*chptr));
375
376 /* doesn't hurt to set it here */
377 chptr->channelts = CurrentTime;
378 chptr->last_join_time = CurrentTime;
379
380 strlcpy(chptr->chname, chname, sizeof(chptr->chname));
381 dlinkAdd(chptr, &chptr->node, &global_channel_list);
382
383 hash_add_channel(chptr);
384
385 return chptr;
386 }
387
388 /*! \brief walk through this channel, and destroy it.
389 * \param chptr channel pointer
390 */
391 void
392 destroy_channel(struct Channel *chptr)
393 {
394 dlink_node *ptr = NULL, *ptr_next = NULL;
395
396 DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
397 del_invite(chptr, ptr->data);
398
399 /* free ban/exception/invex lists */
400 free_channel_list(&chptr->banlist);
401 free_channel_list(&chptr->exceptlist);
402 free_channel_list(&chptr->invexlist);
403
404 dlinkDelete(&chptr->node, &global_channel_list);
405 hash_del_channel(chptr);
406
407 mp_pool_release(chptr);
408 }
409
410 /*!
411 * \param chptr pointer to channel
412 * \return string pointer "=" if public, "@" if secret else "*"
413 */
414 static const char *
415 channel_pub_or_secret(const struct Channel *chptr)
416 {
417 if (SecretChannel(chptr))
418 return "@";
419 if (PrivateChannel(chptr))
420 return "*";
421 return "=";
422 }
423
424 /*! \brief lists all names on given channel
425 * \param source_p pointer to client struct requesting names
426 * \param chptr pointer to channel block
427 * \param show_eon show ENDOFNAMES numeric or not
428 * (don't want it with /names with no params)
429 */
430 void
431 channel_member_names(struct Client *source_p, struct Channel *chptr,
432 int show_eon)
433 {
434 const dlink_node *ptr = NULL;
435 char lbuf[IRCD_BUFSIZE + 1];
436 char *t = NULL, *start = NULL;
437 int tlen = 0;
438 int is_member = IsMember(source_p, chptr);
439 int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 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 tlen = strlen(ms->client_p->name) + 1; /* nick + space */
456
457 if (!multi_prefix)
458 {
459 if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
460 ++tlen;
461 }
462 else
463 {
464 if (ms->flags & CHFL_CHANOP)
465 ++tlen;
466 if (ms->flags & CHFL_HALFOP)
467 ++tlen;
468 if (ms->flags & CHFL_VOICE)
469 ++tlen;
470 }
471
472 if (t + tlen - lbuf > IRCD_BUFSIZE - 2)
473 {
474 *(t - 1) = '\0';
475 sendto_one(source_p, "%s", lbuf);
476 t = start;
477 }
478
479 t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
480 ms->client_p->name);
481 }
482
483 if (tlen != 0)
484 {
485 *(t - 1) = '\0';
486 sendto_one(source_p, "%s", lbuf);
487 }
488 }
489
490 if (show_eon)
491 sendto_one(source_p, form_str(RPL_ENDOFNAMES),
492 me.name, source_p->name, chptr->chname);
493 }
494
495 /*! \brief adds client to invite list
496 * \param chptr pointer to channel block
497 * \param who pointer to client to add invite to
498 */
499 void
500 add_invite(struct Channel *chptr, struct Client *who)
501 {
502 del_invite(chptr, who);
503
504 /*
505 * delete last link in chain if the list is max length
506 */
507 if (dlink_list_length(&who->localClient->invited) >=
508 ConfigChannel.max_chans_per_user)
509 del_invite(who->localClient->invited.tail->data, who);
510
511 /* add client to channel invite list */
512 dlinkAdd(who, make_dlink_node(), &chptr->invites);
513
514 /* add channel to the end of the client invite list */
515 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
516 }
517
518 /*! \brief Delete Invite block from channel invite list
519 * and client invite list
520 * \param chptr pointer to Channel struct
521 * \param who pointer to client to remove invites from
522 */
523 void
524 del_invite(struct Channel *chptr, struct Client *who)
525 {
526 dlink_node *ptr = NULL;
527
528 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
529 free_dlink_node(ptr);
530
531 if ((ptr = dlinkFindDelete(&chptr->invites, who)))
532 free_dlink_node(ptr);
533 }
534
535 /* get_member_status()
536 *
537 * inputs - pointer to struct Membership
538 * - YES if we can combine different flags
539 * output - string either @, +, % or "" depending on whether
540 * chanop, voiced or user
541 * side effects -
542 *
543 * NOTE: Returned string is usually a static buffer
544 * (like in get_client_name)
545 */
546 const char *
547 get_member_status(const struct Membership *ms, const int combine)
548 {
549 static char buffer[4];
550 char *p = buffer;
551
552 if (ms->flags & CHFL_CHANOP)
553 {
554 if (!combine)
555 return "@";
556 *p++ = '@';
557 }
558
559 #ifdef HALFOPS
560 if (ms->flags & CHFL_HALFOP)
561 {
562 if (!combine)
563 return "%";
564 *p++ = '%';
565 }
566 #endif
567
568 if (ms->flags & CHFL_VOICE)
569 *p++ = '+';
570 *p = '\0';
571
572 return buffer;
573 }
574
575 /*!
576 * \param who pointer to Client to check
577 * \param list pointer to ban list to search
578 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
579 *
580 */
581 static int
582 find_bmask(const struct Client *who, const dlink_list *const list)
583 {
584 const dlink_node *ptr = NULL;
585
586 DLINK_FOREACH(ptr, list->head)
587 {
588 const struct Ban *bp = ptr->data;
589
590 if (!match(bp->name, who->name) && !match(bp->user, who->username))
591 {
592 switch (bp->type)
593 {
594 case HM_HOST:
595 if (!match(bp->host, who->host) || !match(bp->host, who->sockhost))
596 return 1;
597 break;
598 case HM_IPV4:
599 if (who->localClient->aftype == AF_INET)
600 if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
601 return 1;
602 break;
603 case HM_IPV6:
604 if (who->localClient->aftype == AF_INET6)
605 if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
606 return 1;
607 break;
608 default:
609 assert(0);
610 }
611 }
612 }
613
614 return 0;
615 }
616
617 /*!
618 * \param chptr pointer to channel block
619 * \param who pointer to client to check access fo
620 * \return 0 if not banned, 1 otherwise
621 */
622 int
623 is_banned(const struct Channel *chptr, const struct Client *who)
624 {
625 if (find_bmask(who, &chptr->banlist))
626 if (!find_bmask(who, &chptr->exceptlist))
627 return 1;
628
629 return 0;
630 }
631
632 /*!
633 * \param source_p pointer to client attempting to join
634 * \param chptr pointer to channel
635 * \param key key sent by client attempting to join if present
636 * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
637 * or 0 if allowed to join.
638 */
639 int
640 can_join(struct Client *source_p, struct Channel *chptr, const char *key)
641 {
642 if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL))
643 return ERR_SSLONLYCHAN;
644
645 if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED))
646 return ERR_NEEDREGGEDNICK;
647
648 if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER))
649 return ERR_OPERONLYCHAN;
650
651 if (chptr->mode.mode & MODE_INVITEONLY)
652 if (!dlinkFind(&source_p->localClient->invited, chptr))
653 if (!find_bmask(source_p, &chptr->invexlist))
654 return ERR_INVITEONLYCHAN;
655
656 if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
657 return ERR_BADCHANNELKEY;
658
659 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
660 chptr->mode.limit)
661 return ERR_CHANNELISFULL;
662
663 if (is_banned(chptr, source_p))
664 return ERR_BANNEDFROMCHAN;
665
666 return 0;
667 }
668
669 int
670 has_member_flags(const struct Membership *ms, const unsigned int flags)
671 {
672 if (ms != NULL)
673 return ms->flags & flags;
674 return 0;
675 }
676
677 struct Membership *
678 find_channel_link(struct Client *client_p, struct Channel *chptr)
679 {
680 dlink_node *ptr = NULL;
681
682 if (!IsClient(client_p))
683 return NULL;
684
685 DLINK_FOREACH(ptr, client_p->channel.head)
686 if (((struct Membership *)ptr->data)->chptr == chptr)
687 return ptr->data;
688
689 return NULL;
690 }
691
692 /*
693 * Basically the same functionality as in bahamut
694 */
695 static int
696 msg_has_ctrls(const char *message)
697 {
698 const unsigned char *p = (const unsigned char *)message;
699
700 for (; *p; ++p)
701 {
702 if (*p > 31 || *p == 1)
703 continue;
704
705 if (*p == 27)
706 {
707 if (*(p + 1) == '$' ||
708 *(p + 1) == '(')
709 {
710 ++p;
711 continue;
712 }
713 }
714
715 return 1;
716 }
717
718 return 0;
719 }
720
721 /*!
722 * \param chptr pointer to Channel struct
723 * \param source_p pointer to Client struct
724 * \param ms pointer to Membership struct (can be NULL)
725 * \return CAN_SEND_OPV if op or voiced on channel\n
726 * CAN_SEND_NONOP if can send to channel but is not an op\n
727 * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
728 */
729 int
730 channel_can_send(struct Channel *chptr, struct Client *source_p,
731 struct Membership *ms, const char *message)
732 {
733 struct MaskItem *conf = NULL;
734
735 if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
736 return CAN_SEND_OPV;
737
738 if (MyClient(source_p) && !IsExemptResv(source_p))
739 if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv))
740 if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf))
741 return ERR_CANNOTSENDTOCHAN;
742
743 if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message))
744 return ERR_NOCTRLSONCHAN;
745 if (ms || (ms = find_channel_link(source_p, chptr)))
746 if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
747 return CAN_SEND_OPV;
748 if (chptr->mode.mode & MODE_MODERATED)
749 return ERR_CANNOTSENDTOCHAN;
750 if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED))
751 return ERR_NEEDREGGEDNICK;
752
753 /* cache can send if banned */
754 if (MyClient(source_p))
755 {
756 if (ms)
757 {
758 if (ms->flags & CHFL_BAN_SILENCED)
759 return ERR_CANNOTSENDTOCHAN;
760
761 if (!(ms->flags & CHFL_BAN_CHECKED))
762 {
763 if (is_banned(chptr, source_p))
764 {
765 ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
766 return ERR_CANNOTSENDTOCHAN;
767 }
768
769 ms->flags |= CHFL_BAN_CHECKED;
770 }
771 }
772 else if (is_banned(chptr, source_p))
773 return ERR_CANNOTSENDTOCHAN;
774 }
775
776 return CAN_SEND_NONOP;
777 }
778
779 /*! \brief Updates the client's oper_warn_count_down, warns the
780 * IRC operators if necessary, and updates
781 * join_leave_countdown as needed.
782 * \param source_p pointer to struct Client to check
783 * \param name channel name or NULL if this is a part.
784 */
785 void
786 check_spambot_warning(struct Client *source_p, const char *name)
787 {
788 int t_delta = 0;
789 int decrement_count = 0;
790
791 if ((GlobalSetOptions.spam_num &&
792 (source_p->localClient->join_leave_count >=
793 GlobalSetOptions.spam_num)))
794 {
795 if (source_p->localClient->oper_warn_count_down > 0)
796 source_p->localClient->oper_warn_count_down--;
797 else
798 source_p->localClient->oper_warn_count_down = 0;
799
800 if (source_p->localClient->oper_warn_count_down == 0)
801 {
802 /* Its already known as a possible spambot */
803 if (name != NULL)
804 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
805 "User %s (%s@%s) trying to join %s is a possible spambot",
806 source_p->name, source_p->username,
807 source_p->host, name);
808 else
809 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
810 "User %s (%s@%s) is a possible spambot",
811 source_p->name, source_p->username,
812 source_p->host);
813 source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
814 }
815 }
816 else
817 {
818 if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
819 JOIN_LEAVE_COUNT_EXPIRE_TIME)
820 {
821 decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
822 if (decrement_count > source_p->localClient->join_leave_count)
823 source_p->localClient->join_leave_count = 0;
824 else
825 source_p->localClient->join_leave_count -= decrement_count;
826 }
827 else
828 {
829 if ((CurrentTime - (source_p->localClient->last_join_time)) <
830 GlobalSetOptions.spam_time)
831 {
832 /* oh, its a possible spambot */
833 source_p->localClient->join_leave_count++;
834 }
835 }
836
837 if (name != NULL)
838 source_p->localClient->last_join_time = CurrentTime;
839 else
840 source_p->localClient->last_leave_time = CurrentTime;
841 }
842 }
843
844 /*! \brief compares usercount and servercount against their split
845 * values and adjusts splitmode accordingly
846 * \param unused Unused address pointer
847 */
848 void
849 check_splitmode(struct Event *ev)
850 {
851 if (splitchecking && (ConfigChannel.no_join_on_split ||
852 ConfigChannel.no_create_on_split))
853 {
854 const unsigned int server = dlink_list_length(&global_serv_list);
855
856 if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
857 {
858 splitmode = 1;
859
860 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
861 "Network split, activating splitmode");
862 timer_add(timer_init(&splitmode_timer), check_splitmode, 0, TT_PERIODIC, 10);
863 }
864 else if (splitmode && (server > split_servers) && (Count.total > split_users))
865 {
866 splitmode = 0;
867
868 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
869 "Network rejoined, deactivating splitmode");
870 timer_del(&splitmode_timer);
871 }
872 }
873 }
874
875 /*! \brief Sets the channel topic for chptr
876 * \param chptr Pointer to struct Channel
877 * \param topic The topic string
878 * \param topic_info n!u\@h formatted string of the topic setter
879 * \param topicts timestamp on the topic
880 */
881 void
882 set_channel_topic(struct Channel *chptr, const char *topic,
883 const char *topic_info, time_t topicts, int local)
884 {
885 if (local)
886 strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ServerInfo.max_topic_length + 1));
887 else
888 strlcpy(chptr->topic, topic, sizeof(chptr->topic));
889
890 strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
891 chptr->topic_time = topicts;
892 }

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