/[svn]/ircd-hybrid/src/channel.c
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Revision 502 - (show annotations)
Fri Mar 3 19:49:25 2006 UTC (15 years, 2 months ago) by michael
File MIME type: text/x-chdr
File size: 24158 byte(s)
- Implemented CAP command handler based uppon ircu's m_cap()
- Added somewhat outdated draft-mitchell-irc-capabilities-01.txt until
  I get the latest version from kev.
- Added "multi-prefix" cap so clients supporting "multi-prefix"
  may recieve multi prefixed NAMES replies, e.g. @%+nick1 @+nick2 ..
- Fixed "make clean" for src/conf/

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 "channel.h"
29 #include "channel_mode.h"
30 #include "client.h"
31 #include "common.h"
32 #include "hash.h"
33 #include "hostmask.h"
34 #include "ircd.h"
35 #include "numeric.h"
36 #include "s_serv.h" /* captab */
37 #include "s_user.h"
38 #include "send.h"
39 #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
40
41 struct config_channel_entry ConfigChannel;
42 dlink_list global_channel_list = { NULL, NULL, 0 };
43 BlockHeap *ban_heap; /*! \todo ban_heap shouldn't be a global var */
44
45 static BlockHeap *topic_heap = NULL;
46 static BlockHeap *member_heap = NULL;
47 static BlockHeap *channel_heap = NULL;
48
49 static char buf[IRCD_BUFSIZE];
50 static char modebuf[MODEBUFLEN];
51 static char parabuf[MODEBUFLEN];
52
53
54 /*! \brief Initializes the channel blockheap, adds known channel CAPAB
55 */
56 void
57 init_channels(void)
58 {
59 /*
60 * XXX - These should get moved to somwhere else once we have
61 * a modular channelmode system
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_heap = BlockHeapCreate("channel", sizeof(struct Channel), CHANNEL_HEAP_SIZE);
68 ban_heap = BlockHeapCreate("ban", sizeof(struct Ban), BAN_HEAP_SIZE);
69 topic_heap = BlockHeapCreate("topic", TOPICLEN+1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE);
70 member_heap = BlockHeapCreate("member", sizeof(struct Membership), CHANNEL_HEAP_SIZE*2);
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,
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 = BlockHeapAlloc(member_heap);
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 BlockHeapFree(member_heap, member);
140
141 if (chptr->members.head == NULL)
142 {
143 assert(dlink_list_length(&chptr->members) == 0);
144 destroy_channel(chptr);
145 }
146 }
147
148 /* send_members()
149 *
150 * inputs -
151 * output - NONE
152 * side effects -
153 */
154 static void
155 send_members(struct Client *client_p, struct Channel *chptr,
156 char *lmodebuf, char *lparabuf)
157 {
158 struct Membership *ms;
159 dlink_node *ptr;
160 int tlen; /* length of text to append */
161 char *t, *start; /* temp char pointer */
162
163 start = t = buf + ircsprintf(buf, ":%s SJOIN %lu %s %s %s:",
164 ID_or_name(&me, client_p),
165 (unsigned long)chptr->channelts,
166 chptr->chname, lmodebuf, lparabuf);
167
168 DLINK_FOREACH(ptr, chptr->members.head)
169 {
170 ms = ptr->data;
171
172 tlen = strlen(IsCapable(client_p, CAP_TS6) ?
173 ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
174
175 if (ms->flags & CHFL_CHANOP)
176 tlen++;
177 #ifdef HALFOPS
178 else if (ms->flags & CHFL_HALFOP)
179 tlen++;
180 #endif
181 if (ms->flags & CHFL_VOICE)
182 tlen++;
183
184 /* space will be converted into CR, but we also need space for LF..
185 * That's why we use '- 1' here
186 * -adx */
187 if (t + tlen - buf > sizeof(buf) - 1)
188 {
189 *(t - 1) = '\0'; /* kill the space and terminate the string */
190 sendto_one(client_p, "%s", buf);
191 t = start;
192 }
193
194 if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
195 *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
196 '%' : '@';
197 if ((ms->flags & CHFL_VOICE))
198 *t++ = '+';
199
200 if (IsCapable(client_p, CAP_TS6))
201 strcpy(t, ID(ms->client_p));
202 else
203 strcpy(t, ms->client_p->name);
204 t += strlen(t);
205 *t++ = ' ';
206 }
207
208 /* should always be non-NULL unless we have a kind of persistent channels */
209 if (chptr->members.head != NULL)
210 t--; /* take the space out */
211 *t = '\0';
212 sendto_one(client_p, "%s", buf);
213 }
214
215 /*! \brief sends +b/+e/+I
216 * \param client_p client pointer to server
217 * \param chptr pointer to channel
218 * \param top pointer to top of mode link list to send
219 * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
220 */
221 static void
222 send_mode_list(struct Client *client_p, struct Channel *chptr,
223 dlink_list *top, char flag)
224 {
225 int ts5 = !IsCapable(client_p, CAP_TS6);
226 dlink_node *lp;
227 struct Ban *banptr;
228 char pbuf[IRCD_BUFSIZE];
229 int tlen, mlen, cur_len, count = 0;
230 char *mp = NULL, *pp = pbuf;
231
232 if (top == NULL || top->length == 0)
233 return;
234
235 if (ts5)
236 mlen = ircsprintf(buf, ":%s MODE %s +", me.name, chptr->chname);
237 else
238 mlen = ircsprintf(buf, ":%s BMASK %lu %s %c :", me.id,
239 (unsigned long)chptr->channelts, chptr->chname, flag);
240
241 /* MODE needs additional one byte for space between buf and pbuf */
242 cur_len = mlen + ts5;
243 mp = buf + mlen;
244
245 DLINK_FOREACH(lp, top->head)
246 {
247 banptr = lp->data;
248
249 /* must add another b/e/I letter if we use MODE */
250 tlen = banptr->len + 3 + ts5;
251
252 /*
253 * send buffer and start over if we cannot fit another ban,
254 * or if the target is non-ts6 and we have too many modes in
255 * in this line.
256 */
257 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
258 (!IsCapable(client_p, CAP_TS6) &&
259 (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
260 {
261 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
262 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
263
264 cur_len = mlen + ts5;
265 mp = buf + mlen;
266 pp = pbuf;
267 count = 0;
268 }
269
270 count++;
271 if (ts5)
272 {
273 *mp++ = flag;
274 *mp = '\0';
275 }
276
277 pp += ircsprintf(pp, "%s!%s@%s ", banptr->name, banptr->username,
278 banptr->host);
279 cur_len += tlen;
280 }
281
282 *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
283 sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
284 }
285
286 /*! \brief send "client_p" a full list of the modes for channel chptr
287 * \param client_p pointer to client client_p
288 * \param chptr pointer to channel pointer
289 */
290 void
291 send_channel_modes(struct Client *client_p, struct Channel *chptr)
292 {
293 if (chptr->chname[0] != '#')
294 return;
295
296 *modebuf = *parabuf = '\0';
297 channel_modes(chptr, client_p, modebuf, parabuf);
298 send_members(client_p, chptr, modebuf, parabuf);
299
300 send_mode_list(client_p, chptr, &chptr->banlist, 'b');
301
302 if (IsCapable(client_p, CAP_EX))
303 send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
304 if (IsCapable(client_p, CAP_IE))
305 send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
306 }
307
308 /*! \brief check channel name for invalid characters
309 * \param name pointer to channel name string
310 * \param local indicates whether it's a local or remote creation
311 * \return 0 if invalid, 1 otherwise
312 */
313 int
314 check_channel_name(const char *name, int local)
315 {
316 const char *p = name;
317 int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN;
318 assert(name != NULL);
319
320 if (!IsChanPrefix(*p))
321 return 0;
322
323 while (*++p)
324 if (!IsChanChar(*p))
325 return 0;
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->username);
337 MyFree(bptr->host);
338 MyFree(bptr->who);
339
340 BlockHeapFree(ban_heap, 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 = BlockHeapAlloc(channel_heap);
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 /* Free the topic */
403 free_topic(chptr);
404
405 dlinkDelete(&chptr->node, &global_channel_list);
406 hash_del_channel(chptr);
407
408 BlockHeapFree(channel_heap, chptr);
409 }
410
411 /*!
412 * \param chptr pointer to channel
413 * \return string pointer "=" if public, "@" if secret else "*"
414 */
415 static const char *
416 channel_pub_or_secret(struct Channel *chptr)
417 {
418 if (SecretChannel(chptr))
419 return "@";
420 if (ParanoidChannel(chptr))
421 return "*";
422 return "=";
423 }
424
425 /*! \brief lists all names on given channel
426 * \param source_p pointer to client struct requesting names
427 * \param chptr pointer to channel block
428 * \param show_eon show ENDOFNAMES numeric or not
429 * (don't want it with /names with no params)
430 */
431 void
432 channel_member_names(struct Client *source_p, struct Channel *chptr,
433 int show_eon)
434 {
435 struct Client *target_p = NULL;
436 struct Membership *ms = NULL;
437 dlink_node *ptr = NULL;
438 char lbuf[IRCD_BUFSIZE + 1];
439 char *t = NULL, *start = NULL;
440 int tlen = 0;
441 int is_member = IsMember(source_p, chptr);
442 int multi_prefix = (source_p->localClient->cap_active & CAP_MULTI_PREFIX) != 0;
443
444 if (PubChannel(chptr) || is_member)
445 {
446 t = lbuf + ircsprintf(lbuf, form_str(RPL_NAMREPLY),
447 me.name, source_p->name,
448 channel_pub_or_secret(chptr),
449 chptr->chname);
450 start = t;
451
452 DLINK_FOREACH(ptr, chptr->members.head)
453 {
454 ms = ptr->data;
455 target_p = ms->client_p;
456
457 if (IsInvisible(target_p) && !is_member)
458 continue;
459
460 tlen = strlen(target_p->name) + 1; /* nick + space */
461
462 if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
463 ++tlen;
464 if (t + tlen - lbuf > IRCD_BUFSIZE)
465 {
466 *(t - 1) = '\0';
467 sendto_one(source_p, "%s", lbuf);
468 t = start;
469 }
470
471 t += ircsprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
472 target_p->name);
473 }
474
475 if (tlen != 0)
476 {
477 *(t - 1) = '\0';
478 sendto_one(source_p, "%s", lbuf);
479 }
480 }
481
482 if (show_eon)
483 sendto_one(source_p, form_str(RPL_ENDOFNAMES),
484 me.name, source_p->name, chptr->chname);
485 }
486
487 /*! \brief adds client to invite list
488 * \param chptr pointer to channel block
489 * \param who pointer to client to add invite to
490 */
491 void
492 add_invite(struct Channel *chptr, struct Client *who)
493 {
494 del_invite(chptr, who);
495
496 /*
497 * delete last link in chain if the list is max length
498 */
499 if (dlink_list_length(&who->localClient->invited) >=
500 ConfigChannel.max_chans_per_user)
501 del_invite(who->localClient->invited.tail->data, who);
502
503 /* add client to channel invite list */
504 dlinkAdd(who, make_dlink_node(), &chptr->invites);
505
506 /* add channel to the end of the client invite list */
507 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
508 }
509
510 /*! \brief Delete Invite block from channel invite list
511 * and client invite list
512 * \param chptr pointer to Channel struct
513 * \param who pointer to client to remove invites from
514 */
515 void
516 del_invite(struct Channel *chptr, struct Client *who)
517 {
518 dlink_node *ptr = NULL;
519
520 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
521 free_dlink_node(ptr);
522
523 if ((ptr = dlinkFindDelete(&chptr->invites, who)))
524 free_dlink_node(ptr);
525 }
526
527 /* get_member_status()
528 *
529 * inputs - pointer to struct Membership
530 * - YES if we can combine different flags
531 * output - string either @, +, % or "" depending on whether
532 * chanop, voiced or user
533 * side effects -
534 *
535 * NOTE: Returned string is usually a static buffer
536 * (like in get_client_name)
537 */
538 const char *
539 get_member_status(const struct Membership *ms, int combine)
540 {
541 static char buffer[4];
542 char *p = NULL;
543
544 if (ms == NULL)
545 return "";
546 p = buffer;
547
548 if (ms->flags & CHFL_CHANOP)
549 {
550 if (!combine)
551 return "@";
552 *p++ = '@';
553 }
554
555 #ifdef HALFOPS
556 if (ms->flags & CHFL_HALFOP)
557 {
558 if (!combine)
559 return "%";
560 *p++ = '%';
561 }
562 #endif
563
564 if (ms->flags & CHFL_VOICE)
565 *p++ = '+';
566 *p = '\0';
567
568 return buffer;
569 }
570
571 /*!
572 * \param who pointer to Client to check
573 * \param list pointer to ban list to search
574 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
575 *
576 */
577 static int
578 find_bmask(const struct Client *who, const dlink_list *const list)
579 {
580 const dlink_node *ptr = NULL;
581
582 DLINK_FOREACH(ptr, list->head)
583 {
584 struct Ban *bp = ptr->data;
585
586 if (match(bp->name, who->name) && match(bp->username, who->username))
587 {
588 switch (bp->type)
589 {
590 case HM_HOST:
591 if (match(bp->host, who->host) || match(bp->host, who->sockhost))
592 return 1;
593 break;
594 case HM_IPV4:
595 if (who->localClient->aftype == AF_INET)
596 if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
597 return 1;
598 break;
599 #ifdef IPV6
600 case HM_IPV6:
601 if (who->localClient->aftype == AF_INET6)
602 if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
603 return 1;
604 break;
605 #endif
606 default:
607 assert(0);
608 }
609 }
610 }
611
612 return 0;
613 }
614
615 /*!
616 * \param chptr pointer to channel block
617 * \param who pointer to client to check access fo
618 * \return 0 if not banned, 1 otherwise
619 */
620 int
621 is_banned(const struct Channel *chptr, const struct Client *who)
622 {
623 assert(IsClient(who));
624
625 if (find_bmask(who, &chptr->banlist))
626 if (!ConfigChannel.use_except || !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 (is_banned(chptr, source_p))
643 return ERR_BANNEDFROMCHAN;
644
645 if (chptr->mode.mode & MODE_INVITEONLY)
646 if (!dlinkFind(&source_p->localClient->invited, chptr))
647 if (!ConfigChannel.use_invex || !find_bmask(source_p, &chptr->invexlist))
648 return ERR_INVITEONLYCHAN;
649
650 if (chptr->mode.key[0] && (EmptyString(key) || irccmp(chptr->mode.key, key)))
651 return ERR_BADCHANNELKEY;
652
653 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
654 chptr->mode.limit)
655 return ERR_CHANNELISFULL;
656
657 return 0;
658 }
659
660 int
661 has_member_flags(struct Membership *ms, unsigned int flags)
662 {
663 if (ms != NULL)
664 return ms->flags & flags;
665 return 0;
666 }
667
668 struct Membership *
669 find_channel_link(struct Client *client_p, struct Channel *chptr)
670 {
671 dlink_node *ptr = NULL;
672
673 if (!IsClient(client_p))
674 return NULL;
675
676 DLINK_FOREACH(ptr, client_p->channel.head)
677 if (((struct Membership *)ptr->data)->chptr == chptr)
678 return (struct Membership *)ptr->data;
679
680 return NULL;
681 }
682
683 /*!
684 * \param chptr pointer to Channel struct
685 * \param source_p pointer to Client struct
686 * \param ms pointer to Membership struct (can be NULL)
687 * \return CAN_SEND_OPV if op or voiced on channel\n
688 * CAN_SEND_NONOP if can send to channel but is not an op\n
689 * CAN_SEND_NO if they cannot send to channel\n
690 */
691 int
692 can_send(struct Channel *chptr, struct Client *source_p, struct Membership *ms)
693 {
694 if (IsServer(source_p))
695 return CAN_SEND_OPV;
696
697 if (MyClient(source_p) && !IsExemptResv(source_p) &&
698 !(IsOper(source_p) && ConfigFileEntry.oper_pass_resv) &&
699 (!hash_find_resv(chptr->chname) == ConfigChannel.restrict_channels))
700 return CAN_SEND_NO;
701
702 if (ms != NULL || (ms = find_channel_link(source_p, chptr)))
703 {
704 if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
705 return CAN_SEND_OPV;
706
707 /* cache can send if quiet_on_ban and banned */
708 if (ConfigChannel.quiet_on_ban && MyClient(source_p))
709 {
710 if (ms->flags & CHFL_BAN_SILENCED)
711 return CAN_SEND_NO;
712
713 if (!(ms->flags & CHFL_BAN_CHECKED))
714 {
715 if (is_banned(chptr, source_p))
716 {
717 ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
718 return CAN_SEND_NO;
719 }
720
721 ms->flags |= CHFL_BAN_CHECKED;
722 }
723 }
724 }
725 else if (chptr->mode.mode & MODE_NOPRIVMSGS)
726 return CAN_SEND_NO;
727
728 if (chptr->mode.mode & MODE_MODERATED)
729 return CAN_SEND_NO;
730
731 return CAN_SEND_NONOP;
732 }
733
734 /*! \brief Updates the client's oper_warn_count_down, warns the
735 * IRC operators if necessary, and updates
736 * join_leave_countdown as needed.
737 * \param source_p pointer to struct Client to check
738 * \param name channel name or NULL if this is a part.
739 */
740 void
741 check_spambot_warning(struct Client *source_p, const char *name)
742 {
743 int t_delta = 0;
744 int decrement_count = 0;
745
746 if ((GlobalSetOptions.spam_num &&
747 (source_p->localClient->join_leave_count >=
748 GlobalSetOptions.spam_num)))
749 {
750 if (source_p->localClient->oper_warn_count_down > 0)
751 source_p->localClient->oper_warn_count_down--;
752 else
753 source_p->localClient->oper_warn_count_down = 0;
754
755 if (source_p->localClient->oper_warn_count_down == 0)
756 {
757 /* Its already known as a possible spambot */
758 if (name != NULL)
759 sendto_realops_flags(UMODE_BOTS, L_ALL,
760 "User %s (%s@%s) trying to join %s is a possible spambot",
761 source_p->name, source_p->username,
762 source_p->host, name);
763 else
764 sendto_realops_flags(UMODE_BOTS, L_ALL,
765 "User %s (%s@%s) is a possible spambot",
766 source_p->name, source_p->username,
767 source_p->host);
768 source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
769 }
770 }
771 else
772 {
773 if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
774 JOIN_LEAVE_COUNT_EXPIRE_TIME)
775 {
776 decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
777 if (decrement_count > source_p->localClient->join_leave_count)
778 source_p->localClient->join_leave_count = 0;
779 else
780 source_p->localClient->join_leave_count -= decrement_count;
781 }
782 else
783 {
784 if ((CurrentTime - (source_p->localClient->last_join_time)) <
785 GlobalSetOptions.spam_time)
786 {
787 /* oh, its a possible spambot */
788 source_p->localClient->join_leave_count++;
789 }
790 }
791
792 if (name != NULL)
793 source_p->localClient->last_join_time = CurrentTime;
794 else
795 source_p->localClient->last_leave_time = CurrentTime;
796 }
797 }
798
799 /*! \brief compares usercount and servercount against their split
800 * values and adjusts splitmode accordingly
801 * \param unused Unused address pointer
802 */
803 void
804 check_splitmode(void *unused)
805 {
806 if (splitchecking && (ConfigChannel.no_join_on_split ||
807 ConfigChannel.no_create_on_split))
808 {
809 const unsigned int server = dlink_list_length(&global_serv_list);
810
811 if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
812 {
813 splitmode = 1;
814
815 sendto_realops_flags(UMODE_ALL,L_ALL,
816 "Network split, activating splitmode");
817 eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
818 }
819 else if (splitmode && (server > split_servers) && (Count.total > split_users))
820 {
821 splitmode = 0;
822
823 sendto_realops_flags(UMODE_ALL, L_ALL,
824 "Network rejoined, deactivating splitmode");
825 eventDelete(check_splitmode, NULL);
826 }
827 }
828 }
829
830 /*! \brief Allocates a new topic
831 * \param chptr Channel to allocate a new topic for
832 */
833 static void
834 allocate_topic(struct Channel *chptr)
835 {
836 void *ptr = NULL;
837 assert(chptr);
838
839 ptr = BlockHeapAlloc(topic_heap);
840
841 /* Basically we allocate one large block for the topic and
842 * the topic info. We then split it up into two and shove it
843 * in the chptr
844 */
845 chptr->topic = ptr;
846 chptr->topic_info = (char *)ptr + TOPICLEN+1;
847 *chptr->topic = '\0';
848 *chptr->topic_info = '\0';
849 }
850
851 void
852 free_topic(struct Channel *chptr)
853 {
854 void *ptr = NULL;
855 assert(chptr);
856 if (chptr->topic == NULL)
857 return;
858
859 /*
860 * If you change allocate_topic you MUST change this as well
861 */
862 ptr = chptr->topic;
863 BlockHeapFree(topic_heap, ptr);
864 chptr->topic = NULL;
865 chptr->topic_info = NULL;
866 }
867
868 /*! \brief Sets the channel topic for chptr
869 * \param chptr Pointer to struct Channel
870 * \param topic The topic string
871 * \param topic_info n!u\@h formatted string of the topic setter
872 * \param topicts timestamp on the topic
873 */
874 void
875 set_channel_topic(struct Channel *chptr, const char *topic,
876 const char *topic_info, time_t topicts)
877 {
878 if (!EmptyString(topic))
879 {
880 if (chptr->topic == NULL)
881 allocate_topic(chptr);
882
883 strlcpy(chptr->topic, topic, TOPICLEN+1);
884 strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN);
885 chptr->topic_time = topicts;
886 }
887 else
888 {
889 if (chptr->topic != NULL)
890 free_topic(chptr);
891
892 chptr->topic_time = 0;
893 }
894 }
895

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