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root/svn/ircd-hybrid/branches/8.2.x/src/channel.c
Revision: 8514
Committed: Fri Apr 6 20:15:15 2018 UTC (5 years, 11 months ago) by michael
Content type: text/x-csrc
File size: 31775 byte(s)
Log Message:
- channel.c: channel_do_join() is called for local clients only; use NULL as first argument to sendto_server()

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2018 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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 "conf_resv.h"
35 #include "hostmask.h"
36 #include "irc_string.h"
37 #include "ircd.h"
38 #include "numeric.h"
39 #include "server.h"
40 #include "send.h"
41 #include "event.h"
42 #include "memory.h"
43 #include "misc.h"
44
45
46 /** Doubly linked list containing a list of all channels. */
47 static dlink_list channel_list;
48
49
50 /*! \brief Returns the channel_list as constant
51 * \return channel_list
52 */
53 const dlink_list *
54 channel_get_list(void)
55 {
56 return &channel_list;
57 }
58
59 /*! \brief Adds a user to a channel by adding another link to the
60 * channels member chain.
61 * \param chptr Pointer to channel to add client to
62 * \param client_p Pointer to client (who) to add
63 * \param flags Flags for chanops etc
64 * \param flood_ctrl Whether to count this join in flood calculations
65 */
66 void
67 add_user_to_channel(struct Channel *chptr, struct Client *client_p,
68 unsigned int flags, int flood_ctrl)
69 {
70 assert(IsClient(client_p));
71
72 if (GlobalSetOptions.joinfloodtime)
73 {
74 if (flood_ctrl)
75 ++chptr->number_joined;
76
77 chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
78 (((float)GlobalSetOptions.joinfloodcount) /
79 (float)GlobalSetOptions.joinfloodtime);
80
81 if (chptr->number_joined <= 0)
82 {
83 chptr->number_joined = 0;
84 ClearJoinFloodNoticed(chptr);
85 }
86 else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
87 {
88 chptr->number_joined = GlobalSetOptions.joinfloodcount;
89
90 if (!IsSetJoinFloodNoticed(chptr))
91 {
92 SetJoinFloodNoticed(chptr);
93 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
94 "Possible Join Flooder %s on %s target: %s",
95 client_get_name(client_p, HIDE_IP),
96 client_p->servptr->name, chptr->name);
97 }
98 }
99
100 chptr->last_join_time = CurrentTime;
101 }
102
103 struct Membership *member = xcalloc(sizeof(*member));
104 member->client_p = client_p;
105 member->chptr = chptr;
106 member->flags = flags;
107
108 dlinkAdd(member, &member->channode, &chptr->members);
109
110 if (MyConnect(client_p))
111 dlinkAdd(member, &member->locchannode, &chptr->locmembers);
112
113 dlinkAdd(member, &member->usernode, &client_p->channel);
114 }
115
116 /*! \brief Deletes an user from a channel by removing a link in the
117 * channels member chain.
118 * \param member Pointer to Membership struct
119 */
120 void
121 remove_user_from_channel(struct Membership *member)
122 {
123 struct Client *const client_p = member->client_p;
124 struct Channel *const chptr = member->chptr;
125
126 dlinkDelete(&member->channode, &chptr->members);
127
128 if (MyConnect(client_p))
129 dlinkDelete(&member->locchannode, &chptr->locmembers);
130
131 dlinkDelete(&member->usernode, &client_p->channel);
132
133 xfree(member);
134
135 if (chptr->members.head == NULL)
136 channel_free(chptr);
137 }
138
139 /* channel_send_members()
140 *
141 * inputs -
142 * output - NONE
143 * side effects -
144 */
145 static void
146 channel_send_members(struct Client *client_p, const struct Channel *chptr,
147 const char *modebuf, const char *parabuf)
148 {
149 dlink_node *node;
150 char buf[IRCD_BUFSIZE] = "";
151 int tlen; /* length of text to append */
152 char *t, *start; /* temp char pointer */
153
154 start = t = buf + snprintf(buf, sizeof(buf), ":%s SJOIN %ju %s %s %s:",
155 me.id, chptr->creationtime,
156 chptr->name, modebuf, parabuf);
157
158 DLINK_FOREACH(node, chptr->members.head)
159 {
160 const struct Membership *member = node->data;
161
162 tlen = strlen(member->client_p->id) + 1; /* +1 for space */
163
164 if (member->flags & CHFL_CHANOP)
165 ++tlen;
166 if (member->flags & CHFL_HALFOP)
167 ++tlen;
168 if (member->flags & CHFL_VOICE)
169 ++tlen;
170
171 /*
172 * Space will be converted into CR, but we also need space for LF..
173 * That's why we use '- 1' here -adx
174 */
175 if (t + tlen - buf > IRCD_BUFSIZE - 1)
176 {
177 *(t - 1) = '\0'; /* Kill the space and terminate the string */
178 sendto_one(client_p, "%s", buf);
179 t = start;
180 }
181
182 if (member->flags & CHFL_CHANOP)
183 *t++ = '@';
184 if (member->flags & CHFL_HALFOP)
185 *t++ = '%';
186 if (member->flags & CHFL_VOICE)
187 *t++ = '+';
188
189 strcpy(t, member->client_p->id);
190
191 t += strlen(t);
192 *t++ = ' ';
193 }
194
195 /* Should always be non-NULL unless we have a kind of persistent channels */
196 if (chptr->members.head)
197 --t; /* Take the space out */
198 *t = '\0';
199 sendto_one(client_p, "%s", buf);
200 }
201
202 /*! \brief Sends +b/+e/+I
203 * \param client_p Client pointer to server
204 * \param chptr Pointer to channel
205 * \param list Pointer to list of modes to send
206 * \param flag Char flag flagging type of mode. Currently this can be 'b', e' or 'I'
207 */
208 static void
209 channel_send_mask_list(struct Client *client_p, const struct Channel *chptr,
210 const dlink_list *list, const char flag)
211 {
212 dlink_node *node;
213 char mbuf[IRCD_BUFSIZE] = "";
214 char pbuf[IRCD_BUFSIZE] = "";
215 int tlen, mlen, cur_len;
216 char *pp = pbuf;
217
218 if (dlink_list_length(list) == 0)
219 return;
220
221 mlen = snprintf(mbuf, sizeof(mbuf), ":%s BMASK %ju %s %c :", me.id,
222 chptr->creationtime, chptr->name, flag);
223 cur_len = mlen;
224
225 DLINK_FOREACH(node, list->head)
226 {
227 const struct Ban *ban = node->data;
228
229 tlen = ban->len + 3; /* +3 for ! + @ + space */
230
231 /*
232 * Send buffer and start over if we cannot fit another ban
233 */
234 if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2)
235 {
236 *(pp - 1) = '\0'; /* Get rid of trailing space on buffer */
237 sendto_one(client_p, "%s%s", mbuf, pbuf);
238
239 cur_len = mlen;
240 pp = pbuf;
241 }
242
243 pp += sprintf(pp, "%s!%s@%s ", ban->name, ban->user, ban->host);
244 cur_len += tlen;
245 }
246
247 *(pp - 1) = '\0'; /* Get rid of trailing space on buffer */
248 sendto_one(client_p, "%s%s", mbuf, pbuf);
249 }
250
251 /*! \brief Send "client_p" a full list of the modes for channel chptr
252 * \param client_p Pointer to client client_p
253 * \param chptr Pointer to channel pointer
254 */
255 void
256 channel_send_modes(struct Client *client_p, const struct Channel *chptr)
257 {
258 char modebuf[MODEBUFLEN] = "";
259 char parabuf[MODEBUFLEN] = "";
260
261 channel_modes(chptr, client_p, modebuf, parabuf);
262 channel_send_members(client_p, chptr, modebuf, parabuf);
263
264 channel_send_mask_list(client_p, chptr, &chptr->banlist, 'b');
265 channel_send_mask_list(client_p, chptr, &chptr->exceptlist, 'e');
266 channel_send_mask_list(client_p, chptr, &chptr->invexlist, 'I');
267 }
268
269 /*! \brief Check channel name for invalid characters
270 * \param name Pointer to channel name string
271 * \param local Indicates whether it's a local or remote creation
272 * \return 0 if invalid, 1 otherwise
273 */
274 int
275 channel_check_name(const char *name, const int local)
276 {
277 const char *p = name;
278
279 assert(!EmptyString(p));
280
281 if (!IsChanPrefix(*p))
282 return 0;
283
284 if (!local || !ConfigChannel.disable_fake_channels)
285 {
286 while (*++p)
287 if (!IsChanChar(*p))
288 return 0;
289 }
290 else
291 {
292 while (*++p)
293 if (!IsVisibleChanChar(*p))
294 return 0;
295 }
296
297 return p - name <= CHANNELLEN;
298 }
299
300 void
301 remove_ban(struct Ban *ban, dlink_list *list)
302 {
303 dlinkDelete(&ban->node, list);
304 xfree(ban);
305 }
306
307 /* channel_free_mask_list()
308 *
309 * inputs - pointer to dlink_list
310 * output - NONE
311 * side effects -
312 */
313 static void
314 channel_free_mask_list(dlink_list *list)
315 {
316 while (list->head)
317 {
318 struct Ban *ban = list->head->data;
319 remove_ban(ban, list);
320 }
321 }
322
323 /*! \brief Get Channel block for name (and allocate a new channel
324 * block, if it didn't exist before)
325 * \param name Channel name
326 * \return Channel block
327 */
328 struct Channel *
329 channel_make(const char *name)
330 {
331 assert(!EmptyString(name));
332
333 struct Channel *chptr = xcalloc(sizeof(*chptr));
334 /* Doesn't hurt to set it here */
335 chptr->creationtime = CurrentTime;
336 chptr->last_join_time = CurrentTime;
337
338 /* Cache channel name length to avoid repetitive strlen() calls. */
339 chptr->name_len = strlcpy(chptr->name, name, sizeof(chptr->name));
340 if (chptr->name_len >= sizeof(chptr->name))
341 chptr->name_len = sizeof(chptr->name) - 1;
342
343 dlinkAdd(chptr, &chptr->node, &channel_list);
344 hash_add_channel(chptr);
345
346 return chptr;
347 }
348
349 /*! \brief Walk through this channel, and destroy it.
350 * \param chptr Channel pointer
351 */
352 void
353 channel_free(struct Channel *chptr)
354 {
355 clear_invite_list(&chptr->invites);
356
357 /* Free ban/exception/invex lists */
358 channel_free_mask_list(&chptr->banlist);
359 channel_free_mask_list(&chptr->exceptlist);
360 channel_free_mask_list(&chptr->invexlist);
361
362 dlinkDelete(&chptr->node, &channel_list);
363 hash_del_channel(chptr);
364
365 xfree(chptr);
366 }
367
368 /*!
369 * \param chptr Pointer to channel
370 * \return String pointer "=" if public, "@" if secret else "*"
371 */
372 static const char *
373 channel_pub_or_secret(const struct Channel *chptr)
374 {
375 if (SecretChannel(chptr))
376 return "@";
377 if (PrivateChannel(chptr))
378 return "*";
379 return "=";
380 }
381
382 /*! \brief lists all names on given channel
383 * \param client_p Pointer to client struct requesting names
384 * \param chptr Pointer to channel block
385 * \param show_eon Show RPL_ENDOFNAMES numeric or not
386 * (don't want it with /names with no params)
387 */
388 void
389 channel_member_names(struct Client *client_p, struct Channel *chptr, int show_eon)
390 {
391 dlink_node *node;
392 char buf[IRCD_BUFSIZE + 1] = "";
393 char *t = NULL, *start = NULL;
394 int tlen = 0;
395 const int is_member = IsMember(client_p, chptr);
396 const int multi_prefix = HasCap(client_p, CAP_MULTI_PREFIX) != 0;
397 const int uhnames = HasCap(client_p, CAP_UHNAMES) != 0;
398
399 assert(IsClient(client_p));
400
401 if (PubChannel(chptr) || is_member)
402 {
403 t = buf + snprintf(buf, sizeof(buf), numeric_form(RPL_NAMREPLY),
404 me.name, client_p->name,
405 channel_pub_or_secret(chptr), chptr->name);
406 start = t;
407
408 DLINK_FOREACH(node, chptr->members.head)
409 {
410 const struct Membership *member = node->data;
411
412 if (HasUMode(member->client_p, UMODE_INVISIBLE) && !is_member)
413 continue;
414
415 if (uhnames)
416 tlen = strlen(member->client_p->name) + strlen(member->client_p->username) +
417 strlen(member->client_p->host) + 3; /* +3 for ! + @ + space */
418 else
419 tlen = strlen(member->client_p->name) + 1; /* +1 for space */
420
421 if (multi_prefix)
422 {
423 if (member->flags & CHFL_CHANOP)
424 ++tlen;
425 if (member->flags & CHFL_HALFOP)
426 ++tlen;
427 if (member->flags & CHFL_VOICE)
428 ++tlen;
429 }
430 else
431 {
432 if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
433 ++tlen;
434 }
435
436 if (t + tlen - buf > IRCD_BUFSIZE - 2)
437 {
438 *(t - 1) = '\0';
439 sendto_one(client_p, "%s", buf);
440 t = start;
441 }
442
443 if (uhnames)
444 t += sprintf(t, "%s%s!%s@%s ", get_member_status(member, multi_prefix),
445 member->client_p->name, member->client_p->username,
446 member->client_p->host);
447 else
448 t += sprintf(t, "%s%s ", get_member_status(member, multi_prefix),
449 member->client_p->name);
450 }
451
452 if (tlen)
453 {
454 *(t - 1) = '\0';
455 sendto_one(client_p, "%s", buf);
456 }
457 }
458
459 if (show_eon)
460 sendto_one_numeric(client_p, &me, RPL_ENDOFNAMES, chptr->name);
461 }
462
463 static struct Invite *
464 find_invite(struct Channel *chptr, struct Client *client_p)
465 {
466 dlink_node *node, *node_next;
467 dlink_list *list;
468
469 /* Take the shortest of the two lists */
470 if (dlink_list_length(&client_p->connection->invited) < dlink_list_length(&chptr->invites))
471 list = &client_p->connection->invited;
472 else
473 list = &chptr->invites;
474
475 DLINK_FOREACH_SAFE(node, node_next, list->head)
476 {
477 struct Invite *invite = node->data;
478
479 if (ConfigChannel.invite_expire_time &&
480 ConfigChannel.invite_expire_time + invite->when < CurrentTime)
481 del_invite(invite);
482 else if (invite->chptr == chptr && invite->client_p == client_p)
483 return invite;
484 }
485
486 return NULL;
487 }
488
489 /*! \brief Adds client to invite list
490 * \param chptr Pointer to channel block
491 * \param client_p Pointer to client to add invite to
492 */
493 void
494 add_invite(struct Channel *chptr, struct Client *client_p)
495 {
496 struct Invite *invite;
497 if ((invite = find_invite(chptr, client_p)))
498 del_invite(invite);
499
500 invite = xcalloc(sizeof(*invite));
501 invite->client_p = client_p;
502 invite->chptr = chptr;
503 invite->when = CurrentTime;
504
505 /* Delete last link in chain if the list is max length */
506 while (dlink_list_length(&client_p->connection->invited) &&
507 dlink_list_length(&client_p->connection->invited) >= ConfigChannel.max_invites)
508 del_invite(client_p->connection->invited.tail->data);
509
510 /* Add client to channel invite list */
511 dlinkAdd(invite, &invite->chan_node, &chptr->invites);
512
513 /* Add channel to the end of the client invite list */
514 dlinkAdd(invite, &invite->user_node, &client_p->connection->invited);
515 }
516
517 /*! \brief Delete Invite block from channel invite list
518 * and client invite list
519 * \param invite Pointer to Invite struct
520 */
521 void
522 del_invite(struct Invite *invite)
523 {
524 dlinkDelete(&invite->user_node, &invite->client_p->connection->invited);
525 dlinkDelete(&invite->chan_node, &invite->chptr->invites);
526
527 /* Release memory pointed to by 'invite' */
528 xfree(invite);
529 }
530
531 /*! \brief Removes and frees all Invite blocks from a list
532 * \param list Pointer to a dlink_list
533 */
534 void
535 clear_invite_list(dlink_list *list)
536 {
537 while (list->head)
538 del_invite(list->head->data);
539 }
540
541 /* get_member_status()
542 *
543 * inputs - pointer to struct Membership
544 * - YES if we can combine different flags
545 * output - string either @, +, % or "" depending on whether
546 * chanop, voiced or user
547 * side effects -
548 *
549 * NOTE: Returned string is usually a static buffer
550 * (like in client_get_name)
551 */
552 const char *
553 get_member_status(const struct Membership *member, const int combine)
554 {
555 static char buffer[CMEMBER_STATUS_FLAGS_LEN + 1]; /* +1 for \0 */
556 char *p = buffer;
557
558 if (member->flags & CHFL_CHANOP)
559 {
560 if (!combine)
561 return "@";
562 *p++ = '@';
563 }
564
565 if (member->flags & CHFL_HALFOP)
566 {
567 if (!combine)
568 return "%";
569 *p++ = '%';
570 }
571
572 if (member->flags & CHFL_VOICE)
573 *p++ = '+';
574 *p = '\0';
575
576 return buffer;
577 }
578
579 /*!
580 * \param client_p Pointer to Client to check
581 * \param list Pointer to ban list to search
582 * \return 1 if ban found for given n!u\@h mask, 0 otherwise
583 */
584 static int
585 find_bmask(const struct Client *client_p, const dlink_list *list)
586 {
587 dlink_node *node;
588
589 DLINK_FOREACH(node, list->head)
590 {
591 const struct Ban *ban = node->data;
592
593 if (!match(ban->name, client_p->name) && !match(ban->user, client_p->username))
594 {
595 switch (ban->type)
596 {
597 case HM_HOST:
598 if (!match(ban->host, client_p->host) || !match(ban->host, client_p->sockhost))
599 return 1;
600 break;
601 case HM_IPV4:
602 if (client_p->ip.ss.ss_family == AF_INET)
603 if (match_ipv4(&client_p->ip, &ban->addr, ban->bits))
604 return 1;
605 break;
606 case HM_IPV6:
607 if (client_p->ip.ss.ss_family == AF_INET6)
608 if (match_ipv6(&client_p->ip, &ban->addr, ban->bits))
609 return 1;
610 break;
611 default:
612 assert(0);
613 }
614 }
615 }
616
617 return 0;
618 }
619
620 /*!
621 * \param chptr Pointer to channel block
622 * \param client_p Pointer to client to check access fo
623 * \return 0 if not banned, 1 otherwise
624 */
625 int
626 is_banned(const struct Channel *chptr, const struct Client *client_p)
627 {
628 if (find_bmask(client_p, &chptr->banlist))
629 if (!find_bmask(client_p, &chptr->exceptlist))
630 return 1;
631
632 return 0;
633 }
634
635 /*! Tests if a client can join a certain channel
636 * \param client_p Pointer to client attempting to join
637 * \param chptr Pointer to channel
638 * \param key Key sent by client attempting to join if present
639 * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
640 * or 0 if allowed to join.
641 */
642 static int
643 can_join(struct Client *client_p, struct Channel *chptr, const char *key)
644 {
645 if (HasCMode(chptr, MODE_SSLONLY) && !HasUMode(client_p, UMODE_SSL))
646 return ERR_SSLONLYCHAN;
647
648 if (HasCMode(chptr, MODE_REGONLY) && !HasUMode(client_p, UMODE_REGISTERED))
649 return ERR_NEEDREGGEDNICK;
650
651 if (HasCMode(chptr, MODE_OPERONLY) && !HasUMode(client_p, UMODE_OPER))
652 return ERR_OPERONLYCHAN;
653
654 if (HasCMode(chptr, MODE_INVITEONLY))
655 if (!find_invite(chptr, client_p))
656 if (!find_bmask(client_p, &chptr->invexlist))
657 return ERR_INVITEONLYCHAN;
658
659 if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
660 return ERR_BADCHANNELKEY;
661
662 if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
663 chptr->mode.limit)
664 return ERR_CHANNELISFULL;
665
666 if (is_banned(chptr, client_p))
667 return ERR_BANNEDFROMCHAN;
668
669 return 0;
670 }
671
672 int
673 has_member_flags(const struct Membership *member, const unsigned int flags)
674 {
675 return member && (member->flags & flags);
676 }
677
678 struct Membership *
679 find_channel_link(const struct Client *client_p, const struct Channel *chptr)
680 {
681 dlink_node *node;
682
683 if (!IsClient(client_p))
684 return NULL;
685
686 /* Take the shortest of the two lists */
687 if (dlink_list_length(&chptr->members) < dlink_list_length(&client_p->channel))
688 {
689 DLINK_FOREACH(node, chptr->members.head)
690 if (((struct Membership *)node->data)->client_p == client_p)
691 return node->data;
692 }
693 else
694 {
695 DLINK_FOREACH(node, client_p->channel.head)
696 if (((struct Membership *)node->data)->chptr == chptr)
697 return node->data;
698 }
699
700 return NULL;
701 }
702
703 /*! Checks if a message contains control codes
704 * \param message The actual message string the client wants to send
705 * \return 1 if the message does contain any control codes, 0 otherwise
706 */
707 static int
708 msg_has_ctrls(const char *message)
709 {
710 const unsigned char *p = (const unsigned char *)message;
711
712 for (; *p; ++p)
713 {
714 if (*p > 31 || *p == 1)
715 continue; /* No control code or CTCP */
716
717 if (*p == 27) /* Escape */
718 {
719 /* ISO 2022 charset shift sequence */
720 if (*(p + 1) == '$' ||
721 *(p + 1) == '(')
722 {
723 ++p;
724 continue;
725 }
726 }
727
728 return 1; /* Control code */
729 }
730
731 return 0; /* No control code found */
732 }
733
734 /*! Tests if a client can send to a channel
735 * \param chptr Pointer to Channel struct
736 * \param client_p Pointer to Client struct
737 * \param member Pointer to Membership struct (can be NULL)
738 * \param message The actual message string the client wants to send
739 * \return CAN_SEND_OPV if op or voiced on channel\n
740 * CAN_SEND_NONOP if can send to channel but is not an op\n
741 * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
742 */
743 int
744 can_send(struct Channel *chptr, struct Client *client_p,
745 struct Membership *member, const char *message, int notice)
746 {
747 const struct ResvItem *resv = NULL;
748
749 if (IsServer(client_p) || HasFlag(client_p, FLAGS_SERVICE))
750 return CAN_SEND_OPV;
751
752 if (MyConnect(client_p) && !HasFlag(client_p, FLAGS_EXEMPTRESV))
753 if (!(HasUMode(client_p, UMODE_OPER) && HasOFlag(client_p, OPER_FLAG_JOIN_RESV)))
754 if ((resv = resv_find(chptr->name, match)) && !resv_exempt_find(client_p, resv))
755 return ERR_CANNOTSENDTOCHAN;
756
757 if (HasCMode(chptr, MODE_NOCTRL) && msg_has_ctrls(message))
758 return ERR_NOCTRLSONCHAN;
759
760 if (HasCMode(chptr, MODE_NOCTCP))
761 if (*message == '\001' && strncmp(message + 1, "ACTION ", 7))
762 return ERR_NOCTCP;
763
764 if (member || (member = find_channel_link(client_p, chptr)))
765 if (member->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
766 return CAN_SEND_OPV;
767
768 if (member == NULL && HasCMode(chptr, MODE_NOPRIVMSGS))
769 return ERR_CANNOTSENDTOCHAN;
770
771 if (HasCMode(chptr, MODE_MODERATED))
772 return ERR_CANNOTSENDTOCHAN;
773
774 if (HasCMode(chptr, MODE_MODREG) && !HasUMode(client_p, UMODE_REGISTERED))
775 return ERR_NEEDREGGEDNICK;
776
777 if (HasCMode(chptr, MODE_NONOTICE) && notice)
778 return ERR_CANNOTSENDTOCHAN;
779
780 /* Cache can send if banned */
781 if (MyConnect(client_p))
782 {
783 if (member)
784 {
785 if (member->flags & CHFL_BAN_SILENCED)
786 return ERR_CANNOTSENDTOCHAN;
787
788 if (!(member->flags & CHFL_BAN_CHECKED))
789 {
790 if (is_banned(chptr, client_p))
791 {
792 member->flags |= (CHFL_BAN_CHECKED | CHFL_BAN_SILENCED);
793 return ERR_CANNOTSENDTOCHAN;
794 }
795
796 member->flags |= CHFL_BAN_CHECKED;
797 }
798 }
799 else if (is_banned(chptr, client_p))
800 return ERR_CANNOTSENDTOCHAN;
801 }
802
803 return CAN_SEND_NONOP;
804 }
805
806 /*! \brief Updates the client's oper_warn_count_down, warns the
807 * IRC operators if necessary, and updates
808 * join_leave_countdown as needed.
809 * \param client_p Pointer to struct Client to check
810 * \param name Channel name or NULL if this is a part.
811 */
812 void
813 check_spambot_warning(struct Client *client_p, const char *name)
814 {
815 if (GlobalSetOptions.spam_num &&
816 (client_p->connection->join_leave_count >= GlobalSetOptions.spam_num))
817 {
818 if (client_p->connection->oper_warn_count_down > 0)
819 client_p->connection->oper_warn_count_down--;
820 else
821 client_p->connection->oper_warn_count_down = 0;
822
823 if (client_p->connection->oper_warn_count_down == 0)
824 {
825 /* It's already known as a possible spambot */
826 if (name)
827 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
828 "User %s (%s@%s) trying to join %s is a possible spambot",
829 client_p->name, client_p->username,
830 client_p->host, name);
831 else
832 sendto_realops_flags(UMODE_BOTS, L_ALL, SEND_NOTICE,
833 "User %s (%s@%s) is a possible spambot",
834 client_p->name, client_p->username,
835 client_p->host);
836 client_p->connection->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
837 }
838 }
839 else
840 {
841 int t_delta = CurrentTime - client_p->connection->last_leave_time;
842 if (t_delta > JOIN_LEAVE_COUNT_EXPIRE_TIME)
843 {
844 int decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
845 if (decrement_count > client_p->connection->join_leave_count)
846 client_p->connection->join_leave_count = 0;
847 else
848 client_p->connection->join_leave_count -= decrement_count;
849 }
850 else
851 {
852 if ((CurrentTime - (client_p->connection->last_join_time)) <
853 GlobalSetOptions.spam_time)
854 client_p->connection->join_leave_count++; /* It's a possible spambot */
855 }
856
857 if (name)
858 client_p->connection->last_join_time = CurrentTime;
859 else
860 client_p->connection->last_leave_time = CurrentTime;
861 }
862 }
863
864 /*! \brief Sets the channel topic for a certain channel
865 * \param chptr Pointer to struct Channel
866 * \param topic The topic string
867 * \param topic_info n!u\@h formatted string of the topic setter
868 * \param topicts Timestamp on the topic
869 * \param local Whether the topic is set by a local client
870 */
871 void
872 channel_set_topic(struct Channel *chptr, const char *topic,
873 const char *topic_info, uintmax_t topicts, int local)
874 {
875 if (local)
876 strlcpy(chptr->topic, topic, IRCD_MIN(sizeof(chptr->topic), ConfigServerInfo.max_topic_length + 1));
877 else
878 strlcpy(chptr->topic, topic, sizeof(chptr->topic));
879
880 strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
881 chptr->topic_time = topicts;
882 }
883
884 void
885 channel_do_join(struct Client *client_p, char *chan_list, char *key_list)
886 {
887 char *p = NULL;
888 const struct ResvItem *resv = NULL;
889 const struct ClassItem *const class = class_get_ptr(&client_p->connection->confs);
890 unsigned int flags = 0;
891
892 assert(MyClient(client_p));
893
894 for (const char *name = strtok_r(chan_list, ",", &p); name;
895 name = strtok_r(NULL, ",", &p))
896 {
897 const char *key = NULL;
898
899 /* If we have any more keys, take the first for this channel. */
900 if (!EmptyString(key_list) && (key_list = strchr(key = key_list, ',')))
901 *key_list++ = '\0';
902
903 /* Empty keys are the same as no keys. */
904 if (key && *key == '\0')
905 key = NULL;
906
907 if (channel_check_name(name, 1) == 0)
908 {
909 sendto_one_numeric(client_p, &me, ERR_BADCHANNAME, name);
910 continue;
911 }
912
913 if (!HasFlag(client_p, FLAGS_EXEMPTRESV) &&
914 !(HasUMode(client_p, UMODE_OPER) && HasOFlag(client_p, OPER_FLAG_JOIN_RESV)) &&
915 ((resv = resv_find(name, match)) && !resv_exempt_find(client_p, resv)))
916 {
917 sendto_one_numeric(client_p, &me, ERR_CHANBANREASON, name, resv->reason);
918 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
919 "Forbidding reserved channel %s from user %s",
920 name, client_get_name(client_p, HIDE_IP));
921 continue;
922 }
923
924 if (dlink_list_length(&client_p->channel) >=
925 ((class->max_channels) ? class->max_channels : ConfigChannel.max_channels))
926 {
927 sendto_one_numeric(client_p, &me, ERR_TOOMANYCHANNELS, name);
928 break;
929 }
930
931 struct Channel *chptr;
932 if ((chptr = hash_find_channel(name)))
933 {
934 if (IsMember(client_p, chptr))
935 continue;
936
937 /* can_join() checks for +i, +l, key, bans, etc. */
938 int ret = can_join(client_p, chptr, key);
939 if (ret)
940 {
941 sendto_one_numeric(client_p, &me, ret, chptr->name);
942 continue;
943 }
944
945 /*
946 * This should never be the case unless there is some sort of
947 * persistant channels.
948 */
949 if (dlink_list_length(&chptr->members) == 0)
950 flags = CHFL_CHANOP;
951 else
952 flags = 0;
953 }
954 else
955 {
956 flags = CHFL_CHANOP;
957 chptr = channel_make(name);
958 }
959
960 if (!HasUMode(client_p, UMODE_OPER))
961 check_spambot_warning(client_p, chptr->name);
962
963 add_user_to_channel(chptr, client_p, flags, 1);
964
965 /*
966 * Set timestamp if appropriate, and propagate
967 */
968 if (flags == CHFL_CHANOP)
969 {
970 chptr->creationtime = CurrentTime;
971 AddCMode(chptr, MODE_TOPICLIMIT);
972 AddCMode(chptr, MODE_NOPRIVMSGS);
973
974 sendto_server(NULL, 0, 0, ":%s SJOIN %ju %s +nt :@%s",
975 me.id, chptr->creationtime,
976 chptr->name, client_p->id);
977
978 /*
979 * Notify all other users on the new channel
980 */
981 sendto_channel_local(NULL, chptr, 0, CAP_EXTENDED_JOIN, 0, ":%s!%s@%s JOIN %s %s :%s",
982 client_p->name, client_p->username,
983 client_p->host, chptr->name, client_p->account, client_p->info);
984 sendto_channel_local(NULL, chptr, 0, 0, CAP_EXTENDED_JOIN, ":%s!%s@%s JOIN :%s",
985 client_p->name, client_p->username,
986 client_p->host, chptr->name);
987 sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s MODE %s +nt",
988 me.name, chptr->name);
989
990 if (client_p->away[0])
991 sendto_channel_local(client_p, chptr, 0, CAP_AWAY_NOTIFY, 0,
992 ":%s!%s@%s AWAY :%s",
993 client_p->name, client_p->username,
994 client_p->host, client_p->away);
995 }
996 else
997 {
998 sendto_server(NULL, 0, 0, ":%s JOIN %ju %s +",
999 client_p->id, chptr->creationtime,
1000 chptr->name);
1001
1002 sendto_channel_local(NULL, chptr, 0, CAP_EXTENDED_JOIN, 0, ":%s!%s@%s JOIN %s %s :%s",
1003 client_p->name, client_p->username,
1004 client_p->host, chptr->name, client_p->account, client_p->info);
1005 sendto_channel_local(NULL, chptr, 0, 0, CAP_EXTENDED_JOIN, ":%s!%s@%s JOIN :%s",
1006 client_p->name, client_p->username,
1007 client_p->host, chptr->name);
1008
1009 if (client_p->away[0])
1010 sendto_channel_local(client_p, chptr, 0, CAP_AWAY_NOTIFY, 0,
1011 ":%s!%s@%s AWAY :%s",
1012 client_p->name, client_p->username,
1013 client_p->host, client_p->away);
1014 }
1015
1016 struct Invite *invite;
1017 if ((invite = find_invite(chptr, client_p)))
1018 del_invite(invite);
1019
1020 if (chptr->topic[0])
1021 {
1022 sendto_one_numeric(client_p, &me, RPL_TOPIC, chptr->name, chptr->topic);
1023 sendto_one_numeric(client_p, &me, RPL_TOPICWHOTIME, chptr->name,
1024 chptr->topic_info, chptr->topic_time);
1025 }
1026
1027 channel_member_names(client_p, chptr, 1);
1028
1029 client_p->connection->last_join_time = CurrentTime;
1030 }
1031 }
1032
1033 /*! \brief Removes a client from a specific channel
1034 * \param client_p Pointer to client to remove
1035 * \param name Name of channel to remove from
1036 * \param reason Part reason to show
1037 */
1038 static void
1039 channel_part_one_client(struct Client *client_p, const char *name, const char *reason)
1040 {
1041 struct Channel *chptr = NULL;
1042 struct Membership *member = NULL;
1043
1044 if ((chptr = hash_find_channel(name)) == NULL)
1045 {
1046 sendto_one_numeric(client_p, &me, ERR_NOSUCHCHANNEL, name);
1047 return;
1048 }
1049
1050 if ((member = find_channel_link(client_p, chptr)) == NULL)
1051 {
1052 sendto_one_numeric(client_p, &me, ERR_NOTONCHANNEL, chptr->name);
1053 return;
1054 }
1055
1056 if (MyConnect(client_p) && !HasUMode(client_p, UMODE_OPER))
1057 check_spambot_warning(client_p, NULL);
1058
1059 /*
1060 * Remove user from the old channel (if any)
1061 * only allow /part reasons in -m chans
1062 */
1063 if (*reason && (!MyConnect(client_p) ||
1064 ((client_p->connection->firsttime +
1065 ConfigGeneral.anti_spam_exit_message_time) < CurrentTime &&
1066 can_send(chptr, client_p, member, reason, 0) < 0)))
1067 {
1068 sendto_server(client_p, 0, 0, ":%s PART %s :%s",
1069 client_p->id, chptr->name, reason);
1070 sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s!%s@%s PART %s :%s",
1071 client_p->name, client_p->username,
1072 client_p->host, chptr->name, reason);
1073 }
1074 else
1075 {
1076 sendto_server(client_p, 0, 0, ":%s PART %s",
1077 client_p->id, chptr->name);
1078 sendto_channel_local(NULL, chptr, 0, 0, 0, ":%s!%s@%s PART %s",
1079 client_p->name, client_p->username,
1080 client_p->host, chptr->name);
1081 }
1082
1083 remove_user_from_channel(member);
1084 }
1085
1086 void
1087 channel_do_part(struct Client *client_p, char *channel, const char *reason)
1088 {
1089 char *p = NULL;
1090 char buf[KICKLEN + 1] = "";
1091
1092 assert(IsClient(client_p));
1093
1094 if (!EmptyString(reason))
1095 strlcpy(buf, reason, sizeof(buf));
1096
1097 for (const char *name = strtok_r(channel, ",", &p); name;
1098 name = strtok_r(NULL, ",", &p))
1099 channel_part_one_client(client_p, name, buf);
1100 }

Properties

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