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root/svn/ircd-hybrid/branches/8.2.x/src/channel.c
Revision: 3889
Committed: Fri Jun 6 18:22:16 2014 UTC (9 years, 9 months ago) by michael
Content type: text/x-csrc
File size: 24240 byte(s)
Log Message:
- channel.c: documentation updates

File Contents

# Content
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 "server.h"
39 #include "send.h"
40 #include "event.h"
41 #include "memory.h"
42 #include "mempool.h"
43 #include "misc.h"
44 #include "resv.h"
45
46
47 dlink_list global_channel_list;
48 mp_pool_t *ban_pool; /*! \todo ban_pool shouldn't be a global var */
49
50 static mp_pool_t *member_pool, *channel_pool;
51 static char buf[IRCD_BUFSIZE];
52
53
54 /*! \brief Initializes the channel blockheap, adds known channel CAPAB
55 */
56 void
57 channel_init(void)
58 {
59 add_capability("EX", CAP_EX, 1);
60 add_capability("IE", CAP_IE, 1);
61
62 channel_pool = mp_pool_new(sizeof(struct Channel), MP_CHUNK_SIZE_CHANNEL);
63 ban_pool = mp_pool_new(sizeof(struct Ban), MP_CHUNK_SIZE_BAN);
64 member_pool = mp_pool_new(sizeof(struct Membership), MP_CHUNK_SIZE_MEMBER);
65 }
66
67 /*! \brief Adds a user to a channel by adding another link to the
68 * channels member chain.
69 * \param chptr Pointer to channel to add client to
70 * \param who Pointer to client (who) to add
71 * \param flags Flags for chanops etc
72 * \param flood_ctrl Whether to count this join in flood calculations
73 */
74 void
75 add_user_to_channel(struct Channel *chptr, struct Client *who,
76 unsigned int flags, int flood_ctrl)
77 {
78 struct Membership *ms = NULL;
79
80 if (GlobalSetOptions.joinfloodtime > 0)
81 {
82 if (flood_ctrl)
83 ++chptr->number_joined;
84
85 chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
86 (((float)GlobalSetOptions.joinfloodcount) /
87 (float)GlobalSetOptions.joinfloodtime);
88
89 if (chptr->number_joined <= 0)
90 {
91 chptr->number_joined = 0;
92 ClearJoinFloodNoticed(chptr);
93 }
94 else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
95 {
96 chptr->number_joined = GlobalSetOptions.joinfloodcount;
97
98 if (!IsSetJoinFloodNoticed(chptr))
99 {
100 SetJoinFloodNoticed(chptr);
101 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
102 "Possible Join Flooder %s on %s target: %s",
103 get_client_name(who, HIDE_IP),
104 who->servptr->name, chptr->chname);
105 }
106 }
107
108 chptr->last_join_time = CurrentTime;
109 }
110
111 ms = mp_pool_get(member_pool);
112 memset(ms, 0, sizeof(*ms));
113
114 ms->client_p = who;
115 ms->chptr = chptr;
116 ms->flags = flags;
117
118 dlinkAdd(ms, &ms->channode, &chptr->members);
119 dlinkAdd(ms, &ms->usernode, &who->channel);
120 }
121
122 /*! \brief Deletes an user from a channel by removing a link in the
123 * channels member chain.
124 * \param member Pointer to Membership struct
125 */
126 void
127 remove_user_from_channel(struct Membership *member)
128 {
129 struct Client *client_p = member->client_p;
130 struct Channel *chptr = member->chptr;
131
132 dlinkDelete(&member->channode, &chptr->members);
133 dlinkDelete(&member->usernode, &client_p->channel);
134
135 mp_pool_release(member);
136
137 if (chptr->members.head == NULL)
138 destroy_channel(chptr);
139 }
140
141 /* send_members()
142 *
143 * inputs -
144 * output - NONE
145 * side effects -
146 */
147 static void
148 send_members(struct Client *client_p, struct Channel *chptr,
149 char *modebuf, char *parabuf)
150 {
151 const dlink_node *ptr = NULL;
152 int tlen; /* length of text to append */
153 char *t, *start; /* temp char pointer */
154
155 start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %lu %s %s %s:",
156 me.id, (unsigned long)chptr->channelts,
157 chptr->chname, modebuf, parabuf);
158
159 DLINK_FOREACH(ptr, chptr->members.head)
160 {
161 const struct Membership *ms = ptr->data;
162
163 tlen = strlen(ms->client_p->id) + 1; /* nick + space */
164
165 if (ms->flags & CHFL_CHANOP)
166 ++tlen;
167 if (ms->flags & CHFL_HALFOP)
168 ++tlen;
169 if (ms->flags & CHFL_VOICE)
170 ++tlen;
171
172 /*
173 * Space will be converted into CR, but we also need space for LF..
174 * That's why we use '- 1' here -adx
175 */
176 if (t + tlen - buf > IRCD_BUFSIZE - 1)
177 {
178 *(t - 1) = '\0'; /* Kill the space and terminate the string */
179 sendto_one(client_p, "%s", buf);
180 t = start;
181 }
182
183 if (ms->flags & CHFL_CHANOP)
184 *t++ = '@';
185 if (ms->flags & CHFL_HALFOP)
186 *t++ = '%';
187 if (ms->flags & CHFL_VOICE)
188 *t++ = '+';
189
190 strcpy(t, ms->client_p->id);
191
192 t += strlen(t);
193 *t++ = ' ';
194 }
195
196 /* Should always be non-NULL unless we have a kind of persistent channels */
197 if (chptr->members.head)
198 t--; /* Take the space out */
199 *t = '\0';
200 sendto_one(client_p, "%s", buf);
201 }
202
203 /*! \brief Sends +b/+e/+I
204 * \param client_p Client pointer to server
205 * \param chptr Pointer to channel
206 * \param top Pointer to top of mode link list to send
207 * \param flag Char flag flagging type of mode. Currently this can be 'b', e' or 'I'
208 */
209 static void
210 send_mode_list(struct Client *client_p, struct Channel *chptr,
211 const dlink_list *top, char flag)
212 {
213 const dlink_node *ptr = NULL;
214 char pbuf[IRCD_BUFSIZE] = "";
215 int tlen, mlen, cur_len;
216 char *pp = pbuf;
217
218 if (top->length == 0)
219 return;
220
221 mlen = snprintf(buf, sizeof(buf), ":%s BMASK %lu %s %c :", me.id,
222 (unsigned long)chptr->channelts, chptr->chname, flag);
223 cur_len = mlen;
224
225 DLINK_FOREACH(ptr, top->head)
226 {
227 const struct Ban *banptr = ptr->data;
228
229 tlen = banptr->len + 3;
230
231 /*
232 * Send buffer and start over if we cannot fit another ban,
233 * or if the target is non-ts6 and we have too many modes in
234 * in this line.
235 */
236 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2)
237 {
238 *(pp - 1) = '\0'; /* Get rid of trailing space on buffer */
239 sendto_one(client_p, "%s%s", buf, pbuf);
240
241 cur_len = mlen;
242 pp = pbuf;
243 }
244
245 pp += sprintf(pp, "%s!%s@%s ", banptr->name, banptr->user,
246 banptr->host);
247 cur_len += tlen;
248 }
249
250 *(pp - 1) = '\0'; /* Get rid of trailing space on buffer */
251 sendto_one(client_p, "%s%s", buf, pbuf);
252 }
253
254 /*! \brief Send "client_p" a full list of the modes for channel chptr
255 * \param client_p Pointer to client client_p
256 * \param chptr Pointer to channel pointer
257 */
258 void
259 send_channel_modes(struct Client *client_p, struct Channel *chptr)
260 {
261 char modebuf[MODEBUFLEN] = "";
262 char parabuf[MODEBUFLEN] = "";
263
264 channel_modes(chptr, client_p, modebuf, parabuf);
265 send_members(client_p, chptr, modebuf, parabuf);
266
267 send_mode_list(client_p, chptr, &chptr->banlist, 'b');
268 send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
269 send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
270 }
271
272 /*! \brief Check channel name for invalid characters
273 * \param name Pointer to channel name string
274 * \param local Indicates whether it's a local or remote creation
275 * \return 0 if invalid, 1 otherwise
276 */
277 int
278 check_channel_name(const char *name, const int local)
279 {
280 const char *p = name;
281
282 assert(name != NULL);
283
284 if (!IsChanPrefix(*p))
285 return 0;
286
287 if (!local || !ConfigChannel.disable_fake_channels)
288 {
289 while (*++p)
290 if (!IsChanChar(*p))
291 return 0;
292 }
293 else
294 {
295 while (*++p)
296 if (!IsVisibleChanChar(*p))
297 return 0;
298 }
299
300 return p - name <= CHANNELLEN;
301 }
302
303 void
304 remove_ban(struct Ban *bptr, dlink_list *list)
305 {
306 dlinkDelete(&bptr->node, list);
307
308 MyFree(bptr->name);
309 MyFree(bptr->user);
310 MyFree(bptr->host);
311 MyFree(bptr->who);
312
313 mp_pool_release(bptr);
314 }
315
316 /* free_channel_list()
317 *
318 * inputs - pointer to dlink_list
319 * output - NONE
320 * side effects -
321 */
322 void
323 free_channel_list(dlink_list *list)
324 {
325 dlink_node *ptr = NULL, *ptr_next = NULL;
326
327 DLINK_FOREACH_SAFE(ptr, ptr_next, list->head)
328 remove_ban(ptr->data, list);
329
330 assert(list->tail == NULL && list->head == NULL);
331 }
332
333 /*! \brief Get Channel block for chname (and allocate a new channel
334 * block, if it didn't exist before)
335 * \param chname Channel name
336 * \return Channel block
337 */
338 struct Channel *
339 make_channel(const char *chname)
340 {
341 struct Channel *chptr = NULL;
342
343 assert(!EmptyString(chname));
344
345 chptr = mp_pool_get(channel_pool);
346
347 memset(chptr, 0, sizeof(*chptr));
348
349 /* Doesn't hurt to set it here */
350 chptr->channelts = CurrentTime;
351 chptr->last_join_time = CurrentTime;
352
353 strlcpy(chptr->chname, chname, sizeof(chptr->chname));
354 dlinkAdd(chptr, &chptr->node, &global_channel_list);
355
356 hash_add_channel(chptr);
357
358 return chptr;
359 }
360
361 /*! \brief Walk through this channel, and destroy it.
362 * \param chptr Channel pointer
363 */
364 void
365 destroy_channel(struct Channel *chptr)
366 {
367 dlink_node *ptr = NULL, *ptr_next = NULL;
368
369 DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
370 del_invite(chptr, ptr->data);
371
372 /* Free ban/exception/invex lists */
373 free_channel_list(&chptr->banlist);
374 free_channel_list(&chptr->exceptlist);
375 free_channel_list(&chptr->invexlist);
376
377 dlinkDelete(&chptr->node, &global_channel_list);
378 hash_del_channel(chptr);
379
380 mp_pool_release(chptr);
381 }
382
383 /*!
384 * \param chptr Pointer to channel
385 * \return String pointer "=" if public, "@" if secret else "*"
386 */
387 static const char *
388 channel_pub_or_secret(const struct Channel *chptr)
389 {
390 if (SecretChannel(chptr))
391 return "@";
392 if (PrivateChannel(chptr))
393 return "*";
394 return "=";
395 }
396
397 /*! \brief lists all names on given channel
398 * \param source_p Pointer to client struct requesting names
399 * \param chptr Pointer to channel block
400 * \param show_eon Show RPL_ENDOFNAMES numeric or not
401 * (don't want it with /names with no params)
402 */
403 void
404 channel_member_names(struct Client *source_p, struct Channel *chptr,
405 int show_eon)
406 {
407 const dlink_node *ptr = NULL;
408 char lbuf[IRCD_BUFSIZE + 1] = "";
409 char *t = NULL, *start = NULL;
410 int tlen = 0;
411 int is_member = IsMember(source_p, chptr);
412 int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0;
413 int uhnames = HasCap(source_p, CAP_UHNAMES) != 0;
414
415 if (PubChannel(chptr) || is_member)
416 {
417 t = lbuf + snprintf(lbuf, sizeof(lbuf), numeric_form(RPL_NAMREPLY),
418 me.name, source_p->name,
419 channel_pub_or_secret(chptr), chptr->chname);
420 start = t;
421
422 DLINK_FOREACH(ptr, chptr->members.head)
423 {
424 const struct Membership *ms = ptr->data;
425
426 if (HasUMode(ms->client_p, UMODE_INVISIBLE) && !is_member)
427 continue;
428
429 if (!uhnames)
430 tlen = strlen(ms->client_p->name) + 1; /* nick + space */
431 else
432 tlen = strlen(ms->client_p->name) + strlen(ms->client_p->username) +
433 strlen(ms->client_p->host) + 3;
434
435 if (!multi_prefix)
436 {
437 if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
438 ++tlen;
439 }
440 else
441 {
442 if (ms->flags & CHFL_CHANOP)
443 ++tlen;
444 if (ms->flags & CHFL_HALFOP)
445 ++tlen;
446 if (ms->flags & CHFL_VOICE)
447 ++tlen;
448 }
449
450 if (t + tlen - lbuf > IRCD_BUFSIZE - 2)
451 {
452 *(t - 1) = '\0';
453 sendto_one(source_p, "%s", lbuf);
454 t = start;
455 }
456
457 if (!uhnames)
458 t += sprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
459 ms->client_p->name);
460 else
461 t += sprintf(t, "%s%s!%s@%s ", get_member_status(ms, multi_prefix),
462 ms->client_p->name, ms->client_p->username,
463 ms->client_p->host);
464 }
465
466 if (tlen)
467 {
468 *(t - 1) = '\0';
469 sendto_one(source_p, "%s", lbuf);
470 }
471 }
472
473 if (show_eon)
474 sendto_one_numeric(source_p, &me, RPL_ENDOFNAMES, chptr->chname);
475 }
476
477 /*! \brief Adds client to invite list
478 * \param chptr Pointer to channel block
479 * \param who Pointer to client to add invite to
480 */
481 void
482 add_invite(struct Channel *chptr, struct Client *who)
483 {
484 del_invite(chptr, who);
485
486 /*
487 * Delete last link in chain if the list is max length
488 */
489 if (dlink_list_length(&who->localClient->invited) >=
490 ConfigChannel.max_chans_per_user)
491 del_invite(who->localClient->invited.tail->data, who);
492
493 /* Add client to channel invite list */
494 dlinkAdd(who, make_dlink_node(), &chptr->invites);
495
496 /* Add channel to the end of the client invite list */
497 dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
498 }
499
500 /*! \brief Delete Invite block from channel invite list
501 * and client invite list
502 * \param chptr Pointer to Channel struct
503 * \param who Pointer to client to remove invites from
504 */
505 void
506 del_invite(struct Channel *chptr, struct Client *who)
507 {
508 dlink_node *ptr = NULL;
509
510 if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
511 free_dlink_node(ptr);
512
513 if ((ptr = dlinkFindDelete(&chptr->invites, who)))
514 free_dlink_node(ptr);
515 }
516
517 /* get_member_status()
518 *
519 * inputs - pointer to struct Membership
520 * - YES if we can combine different flags
521 * output - string either @, +, % or "" depending on whether
522 * chanop, voiced or user
523 * side effects -
524 *
525 * NOTE: Returned string is usually a static buffer
526 * (like in get_client_name)
527 */
528 const char *
529 get_member_status(const struct Membership *ms, const int combine)
530 {
531 static char buffer[4];
532 char *p = buffer;
533
534 if (ms->flags & CHFL_CHANOP)
535 {
536 if (!combine)
537 return "@";
538 *p++ = '@';
539 }
540
541 if (ms->flags & CHFL_HALFOP)
542 {
543 if (!combine)
544 return "%";
545 *p++ = '%';
546 }
547
548 if (ms->flags & CHFL_VOICE)
549 *p++ = '+';
550 *p = '\0';
551
552 return buffer;
553 }
554
555 /*!
556 * \param who Pointer to Client to check
557 * \param list Pointer to ban list to search
558 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
559 *
560 */
561 static int
562 find_bmask(const struct Client *who, const dlink_list *const list)
563 {
564 const dlink_node *ptr = NULL;
565
566 DLINK_FOREACH(ptr, list->head)
567 {
568 const struct Ban *bp = ptr->data;
569
570 if (!match(bp->name, who->name) && !match(bp->user, who->username))
571 {
572 switch (bp->type)
573 {
574 case HM_HOST:
575 if (!match(bp->host, who->host) || !match(bp->host, who->sockhost))
576 return 1;
577 break;
578 case HM_IPV4:
579 if (who->localClient->aftype == AF_INET)
580 if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
581 return 1;
582 break;
583 #ifdef IPV6
584 case HM_IPV6:
585 if (who->localClient->aftype == AF_INET6)
586 if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
587 return 1;
588 break;
589 #endif
590 default:
591 assert(0);
592 }
593 }
594 }
595
596 return 0;
597 }
598
599 /*!
600 * \param chptr Pointer to channel block
601 * \param who Pointer to client to check access fo
602 * \return 0 if not banned, 1 otherwise
603 */
604 int
605 is_banned(const struct Channel *chptr, const struct Client *who)
606 {
607 if (find_bmask(who, &chptr->banlist))
608 if (!find_bmask(who, &chptr->exceptlist))
609 return 1;
610
611 return 0;
612 }
613
614 /*! Tests if a client can join a certain channel
615 * \param source_p Pointer to client attempting to join
616 * \param chptr Pointer to channel
617 * \param key Key sent by client attempting to join if present
618 * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
619 * or 0 if allowed to join.
620 */
621 int
622 can_join(struct Client *source_p, struct Channel *chptr, const char *key)
623 {
624 if ((chptr->mode.mode & MODE_SSLONLY) && !HasUMode(source_p, UMODE_SSL))
625 return ERR_SSLONLYCHAN;
626
627 if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED))
628 return ERR_NEEDREGGEDNICK;
629
630 if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER))
631 return ERR_OPERONLYCHAN;
632
633 if (chptr->mode.mode & MODE_INVITEONLY)
634 if (!dlinkFind(&source_p->localClient->invited, chptr))
635 if (!find_bmask(source_p, &chptr->invexlist))
636 return ERR_INVITEONLYCHAN;
637
638 if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
639 return ERR_BADCHANNELKEY;
640
641 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
642 chptr->mode.limit)
643 return ERR_CHANNELISFULL;
644
645 if (is_banned(chptr, source_p))
646 return ERR_BANNEDFROMCHAN;
647
648 return 0;
649 }
650
651 int
652 has_member_flags(const struct Membership *ms, const unsigned int flags)
653 {
654 return ms && (ms->flags & flags);
655 }
656
657 struct Membership *
658 find_channel_link(struct Client *client_p, struct Channel *chptr)
659 {
660 dlink_node *ptr = NULL;
661
662 if (!IsClient(client_p))
663 return NULL;
664
665 if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel))
666 {
667 DLINK_FOREACH(ptr, chptr->members.head)
668 if (((struct Membership *)ptr->data)->client_p == client_p)
669 return ptr->data;
670 }
671 else
672 {
673 DLINK_FOREACH(ptr, client_p->channel.head)
674 if (((struct Membership *)ptr->data)->chptr == chptr)
675 return ptr->data;
676 }
677
678 return NULL;
679 }
680
681 /*! Tests if a client can send to a channel
682 * \param message The actual message string the client wants to send
683 * \return 1 if the message does contain any control codes, 0 otherwise
684 */
685 static int
686 msg_has_ctrls(const char *message)
687 {
688 const unsigned char *p = (const unsigned char *)message;
689
690 for (; *p; ++p)
691 {
692 if (*p > 31 || *p == 1)
693 continue; /* CTCP or no control code */
694
695 if (*p == 27) /* Escape */
696 {
697 /* ISO 2022 charset shift sequence */
698 if (*(p + 1) == '$' ||
699 *(p + 1) == '(')
700 {
701 ++p;
702 continue;
703 }
704 }
705
706 return 1; /* Control code */
707 }
708
709 return 0;
710 }
711
712 /*! Tests if a client can send to a channel
713 * \param chptr Pointer to Channel struct
714 * \param source_p Pointer to Client struct
715 * \param ms Pointer to Membership struct (can be NULL)
716 * \param message The actual message string the client wants to send
717 * \return CAN_SEND_OPV if op or voiced on channel\n
718 * CAN_SEND_NONOP if can send to channel but is not an op\n
719 * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
720 */
721 int
722 can_send(struct Channel *chptr, struct Client *source_p,
723 struct Membership *ms, const char *message)
724 {
725 struct MaskItem *conf = NULL;
726
727 if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
728 return CAN_SEND_OPV;
729
730 if (MyClient(source_p) && !IsExemptResv(source_p))
731 if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv))
732 if ((conf = match_find_resv(chptr->chname)) && !resv_find_exempt(source_p, conf))
733 return ERR_CANNOTSENDTOCHAN;
734
735 if ((chptr->mode.mode & MODE_NOCTRL) && msg_has_ctrls(message))
736 return ERR_NOCTRLSONCHAN;
737 if (ms || (ms = find_channel_link(source_p, chptr)))
738 if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
739 return CAN_SEND_OPV;
740 if (!ms && (chptr->mode.mode & MODE_NOPRIVMSGS))
741 return ERR_CANNOTSENDTOCHAN;
742 if (chptr->mode.mode & MODE_MODERATED)
743 return ERR_CANNOTSENDTOCHAN;
744 if ((chptr->mode.mode & MODE_MODREG) && !HasUMode(source_p, UMODE_REGISTERED))
745 return ERR_NEEDREGGEDNICK;
746
747 /* Cache can send if banned */
748 if (MyClient(source_p))
749 {
750 if (ms)
751 {
752 if (ms->flags & CHFL_BAN_SILENCED)
753 return ERR_CANNOTSENDTOCHAN;
754
755 if (!(ms->flags & CHFL_BAN_CHECKED))
756 {
757 if (is_banned(chptr, source_p))
758 {
759 ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
760 return ERR_CANNOTSENDTOCHAN;
761 }
762
763 ms->flags |= CHFL_BAN_CHECKED;
764 }
765 }
766 else if (is_banned(chptr, source_p))
767 return ERR_CANNOTSENDTOCHAN;
768 }
769
770 return CAN_SEND_NONOP;
771 }
772
773 /*! \brief Updates the client's oper_warn_count_down, warns the
774 * IRC operators if necessary, and updates
775 * join_leave_countdown as needed.
776 * \param source_p Pointer to struct Client to check
777 * \param name Channel name or NULL if this is a part.
778 */
779 void
780 check_spambot_warning(struct Client *source_p, const char *name)
781 {
782 int t_delta = 0;
783 int decrement_count = 0;
784
785 if ((GlobalSetOptions.spam_num &&
786 (source_p->localClient->join_leave_count >=
787 GlobalSetOptions.spam_num)))
788 {
789 if (source_p->localClient->oper_warn_count_down > 0)
790 source_p->localClient->oper_warn_count_down--;
791 else
792 source_p->localClient->oper_warn_count_down = 0;
793
794 if (source_p->localClient->oper_warn_count_down == 0)
795 {
796 /* It's already known as a possible spambot */
797 if (name)
798 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
799 "User %s (%s@%s) trying to join %s is a possible spambot",
800 source_p->name, source_p->username,
801 source_p->host, name);
802 else
803 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
804 "User %s (%s@%s) is a possible spambot",
805 source_p->name, source_p->username,
806 source_p->host);
807 source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
808 }
809 }
810 else
811 {
812 if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
813 JOIN_LEAVE_COUNT_EXPIRE_TIME)
814 {
815 decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
816 if (decrement_count > source_p->localClient->join_leave_count)
817 source_p->localClient->join_leave_count = 0;
818 else
819 source_p->localClient->join_leave_count -= decrement_count;
820 }
821 else
822 {
823 if ((CurrentTime - (source_p->localClient->last_join_time)) <
824 GlobalSetOptions.spam_time)
825 source_p->localClient->join_leave_count++; /* It's a possible spambot */
826 }
827
828 if (name)
829 source_p->localClient->last_join_time = CurrentTime;
830 else
831 source_p->localClient->last_leave_time = CurrentTime;
832 }
833 }
834
835 /*! \brief Compares usercount and servercount against their split
836 * values and adjusts splitmode accordingly
837 * \param unused Unused address pointer
838 */
839 void
840 check_splitmode(void *unused)
841 {
842 if (splitchecking && (ConfigChannel.no_join_on_split ||
843 ConfigChannel.no_create_on_split))
844 {
845 const unsigned int server = dlink_list_length(&global_serv_list);
846
847 if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
848 {
849 splitmode = 1;
850
851 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
852 "Network split, activating splitmode");
853 eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
854 }
855 else if (splitmode && (server > split_servers) && (Count.total > split_users))
856 {
857 splitmode = 0;
858
859 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
860 "Network rejoined, deactivating splitmode");
861 eventDelete(check_splitmode, NULL);
862 }
863 }
864 }
865
866 /*! \brief Sets the channel topic for a certain channel
867 * \param chptr Pointer to struct Channel
868 * \param topic The topic string
869 * \param topic_info n!u\@h formatted string of the topic setter
870 * \param topicts Timestamp on the topic
871 * \param local Whether the topic is set by a local client
872 */
873 void
874 set_channel_topic(struct Channel *chptr, const char *topic,
875 const char *topic_info, time_t topicts, int local)
876 {
877 if (local)
878 strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ServerInfo.max_topic_length + 1));
879 else
880 strlcpy(chptr->topic, topic, sizeof(chptr->topic));
881
882 strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
883 chptr->topic_time = topicts;
884 }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision