2 * ircd-ratbox: A slightly useful ircd.
3 * channel.c: Controls channels.
5 * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
6 * Copyright (C) 1996-2002 Hybrid Development Team
7 * Copyright (C) 2002-2005 ircd-ratbox development team
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 * $Id: channel.c 3580 2007-11-07 23:45:14Z jilles $
37 #include "s_serv.h" /* captab */
41 #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
42 #include "s_newconf.h"
44 #include "ipv4_from_ipv6.h"
46 #include "inline/stringops.h"
48 struct config_channel_entry ConfigChannel
;
49 rb_dlink_list global_channel_list
;
50 static rb_bh
*channel_heap
;
51 static rb_bh
*ban_heap
;
52 static rb_bh
*topic_heap
;
53 static rb_bh
*member_heap
;
55 static void free_topic(struct Channel
*chptr
);
57 static int h_can_join
;
58 static int h_can_send
;
59 int h_get_channel_access
;
65 * side effects - initialises the various blockheaps
70 channel_heap
= rb_bh_create(sizeof(struct Channel
), CHANNEL_HEAP_SIZE
, "channel_heap");
71 ban_heap
= rb_bh_create(sizeof(struct Ban
), BAN_HEAP_SIZE
, "ban_heap");
72 topic_heap
= rb_bh_create(TOPICLEN
+ 1 + USERHOST_REPLYLEN
, TOPIC_HEAP_SIZE
, "topic_heap");
73 member_heap
= rb_bh_create(sizeof(struct membership
), MEMBER_HEAP_SIZE
, "member_heap");
75 h_can_join
= register_hook("can_join");
76 h_can_send
= register_hook("can_send");
77 h_get_channel_access
= register_hook("get_channel_access");
81 * allocate_channel - Allocates a channel
84 allocate_channel(const char *chname
)
86 struct Channel
*chptr
;
87 chptr
= rb_bh_alloc(channel_heap
);
88 chptr
->chname
= rb_strdup(chname
);
93 free_channel(struct Channel
*chptr
)
95 rb_free(chptr
->chname
);
96 rb_free(chptr
->mode_lock
);
97 rb_bh_free(channel_heap
, chptr
);
101 allocate_ban(const char *banstr
, const char *who
, const char *forward
)
104 bptr
= rb_bh_alloc(ban_heap
);
105 bptr
->banstr
= rb_strdup(banstr
);
106 bptr
->who
= rb_strdup(who
);
107 bptr
->forward
= forward
? rb_strdup(forward
) : NULL
;
113 free_ban(struct Ban
*bptr
)
115 rb_free(bptr
->banstr
);
117 rb_free(bptr
->forward
);
118 rb_bh_free(ban_heap
, bptr
);
122 * send_channel_join()
124 * input - channel to join, client joining.
126 * side effects - none
129 send_channel_join(struct Channel
*chptr
, struct Client
*client_p
)
131 if (!IsClient(client_p
))
134 sendto_channel_local_with_capability(ALL_MEMBERS
, NOCAPS
, CLICAP_EXTENDED_JOIN
, chptr
, ":%s!%s@%s JOIN %s",
135 client_p
->name
, client_p
->username
, client_p
->host
, chptr
->chname
);
137 sendto_channel_local_with_capability(ALL_MEMBERS
, CLICAP_EXTENDED_JOIN
, NOCAPS
, chptr
, ":%s!%s@%s JOIN %s %s :%s",
138 client_p
->name
, client_p
->username
, client_p
->host
, chptr
->chname
,
139 EmptyString(client_p
->user
->suser
) ? "*" : client_p
->user
->suser
,
142 /* Send away message to away-notify enabled clients. */
143 if (client_p
->user
->away
)
144 sendto_channel_local_with_capability_butone(client_p
, ALL_MEMBERS
, CLICAP_AWAY_NOTIFY
, NOCAPS
, chptr
,
145 ":%s!%s@%s AWAY :%s", client_p
->name
, client_p
->username
,
146 client_p
->host
, client_p
->user
->away
);
149 /* find_channel_membership()
151 * input - channel to find them in, client to find
152 * output - membership of client in channel, else NULL
156 find_channel_membership(struct Channel
*chptr
, struct Client
*client_p
)
158 struct membership
*msptr
;
161 if(!IsClient(client_p
))
164 /* Pick the most efficient list to use to be nice to things like
165 * CHANSERV which could be in a large number of channels
167 if(rb_dlink_list_length(&chptr
->members
) < rb_dlink_list_length(&client_p
->user
->channel
))
169 RB_DLINK_FOREACH(ptr
, chptr
->members
.head
)
173 if(msptr
->client_p
== client_p
)
179 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
183 if(msptr
->chptr
== chptr
)
191 /* find_channel_status()
193 * input - membership to get status for, whether we can combine flags
194 * output - flags of user on channel
198 find_channel_status(struct membership
*msptr
, int combine
)
200 static char buffer
[3];
219 /* add_user_to_channel()
221 * input - channel to add client to, client to add, channel flags
223 * side effects - user is added to channel
226 add_user_to_channel(struct Channel
*chptr
, struct Client
*client_p
, int flags
)
228 struct membership
*msptr
;
230 s_assert(client_p
->user
!= NULL
);
231 if(client_p
->user
== NULL
)
234 msptr
= rb_bh_alloc(member_heap
);
236 msptr
->chptr
= chptr
;
237 msptr
->client_p
= client_p
;
238 msptr
->flags
= flags
;
240 rb_dlinkAdd(msptr
, &msptr
->usernode
, &client_p
->user
->channel
);
241 rb_dlinkAdd(msptr
, &msptr
->channode
, &chptr
->members
);
243 if(MyClient(client_p
))
244 rb_dlinkAdd(msptr
, &msptr
->locchannode
, &chptr
->locmembers
);
247 /* remove_user_from_channel()
249 * input - membership pointer to remove from channel
251 * side effects - membership (thus user) is removed from channel
254 remove_user_from_channel(struct membership
*msptr
)
256 struct Client
*client_p
;
257 struct Channel
*chptr
;
258 s_assert(msptr
!= NULL
);
262 client_p
= msptr
->client_p
;
263 chptr
= msptr
->chptr
;
265 rb_dlinkDelete(&msptr
->usernode
, &client_p
->user
->channel
);
266 rb_dlinkDelete(&msptr
->channode
, &chptr
->members
);
268 if(client_p
->servptr
== &me
)
269 rb_dlinkDelete(&msptr
->locchannode
, &chptr
->locmembers
);
271 if(!(chptr
->mode
.mode
& MODE_PERMANENT
) && rb_dlink_list_length(&chptr
->members
) <= 0)
272 destroy_channel(chptr
);
274 rb_bh_free(member_heap
, msptr
);
279 /* remove_user_from_channels()
281 * input - user to remove from all channels
283 * side effects - user is removed from all channels
286 remove_user_from_channels(struct Client
*client_p
)
288 struct Channel
*chptr
;
289 struct membership
*msptr
;
291 rb_dlink_node
*next_ptr
;
296 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, client_p
->user
->channel
.head
)
299 chptr
= msptr
->chptr
;
301 rb_dlinkDelete(&msptr
->channode
, &chptr
->members
);
303 if(client_p
->servptr
== &me
)
304 rb_dlinkDelete(&msptr
->locchannode
, &chptr
->locmembers
);
306 if(!(chptr
->mode
.mode
& MODE_PERMANENT
) && rb_dlink_list_length(&chptr
->members
) <= 0)
307 destroy_channel(chptr
);
309 rb_bh_free(member_heap
, msptr
);
312 client_p
->user
->channel
.head
= client_p
->user
->channel
.tail
= NULL
;
313 client_p
->user
->channel
.length
= 0;
316 /* invalidate_bancache_user()
318 * input - user to invalidate ban cache for
320 * side effects - ban cache is invalidated for all memberships of that user
321 * to be used after a nick change
324 invalidate_bancache_user(struct Client
*client_p
)
326 struct membership
*msptr
;
332 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
336 msptr
->flags
&= ~CHFL_BANNED
;
340 /* check_channel_name()
342 * input - channel name
343 * output - 1 if valid channel name, else 0
347 check_channel_name(const char *name
)
349 s_assert(name
!= NULL
);
353 for (; *name
; ++name
)
355 if(!IsChanChar(*name
))
362 /* free_channel_list()
364 * input - rb_dlink list to free
366 * side effects - list of b/e/I modes is cleared
369 free_channel_list(rb_dlink_list
* list
)
372 rb_dlink_node
*next_ptr
;
373 struct Ban
*actualBan
;
375 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, list
->head
)
377 actualBan
= ptr
->data
;
381 list
->head
= list
->tail
= NULL
;
387 * input - channel to destroy
389 * side effects - channel is obliterated
392 destroy_channel(struct Channel
*chptr
)
394 rb_dlink_node
*ptr
, *next_ptr
;
396 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, chptr
->invites
.head
)
398 del_invite(chptr
, ptr
->data
);
401 /* free all bans/exceptions/denies */
402 free_channel_list(&chptr
->banlist
);
403 free_channel_list(&chptr
->exceptlist
);
404 free_channel_list(&chptr
->invexlist
);
405 free_channel_list(&chptr
->quietlist
);
410 rb_dlinkDelete(&chptr
->node
, &global_channel_list
);
411 del_from_channel_hash(chptr
->chname
, chptr
);
415 /* channel_pub_or_secret()
418 * output - "=" if public, "@" if secret, else "*"
422 channel_pub_or_secret(struct Channel
*chptr
)
424 if(PubChannel(chptr
))
426 else if(SecretChannel(chptr
))
431 /* channel_member_names()
433 * input - channel to list, client to list to, show endofnames
435 * side effects - client is given list of users on channel
438 channel_member_names(struct Channel
*chptr
, struct Client
*client_p
, int show_eon
)
440 struct membership
*msptr
;
441 struct Client
*target_p
;
449 int stack
= IsCapable(client_p
, CLICAP_MULTI_PREFIX
);
451 if(ShowChannel(client_p
, chptr
))
453 is_member
= IsMember(client_p
, chptr
);
455 cur_len
= mlen
= rb_sprintf(lbuf
, form_str(RPL_NAMREPLY
),
456 me
.name
, client_p
->name
,
457 channel_pub_or_secret(chptr
), chptr
->chname
);
461 RB_DLINK_FOREACH(ptr
, chptr
->members
.head
)
464 target_p
= msptr
->client_p
;
466 if(IsInvisible(target_p
) && !is_member
)
469 if (IsCapable(client_p
, CLICAP_USERHOST_IN_NAMES
))
471 /* space, possible "@+" prefix */
472 if (cur_len
+ strlen(target_p
->name
) + strlen(target_p
->username
) + strlen(target_p
->host
) + 5 >= BUFSIZE
- 5)
475 sendto_one(client_p
, "%s", lbuf
);
480 tlen
= rb_sprintf(t
, "%s%s!%s@%s ", find_channel_status(msptr
, stack
),
481 target_p
->name
, target_p
->username
, target_p
->host
);
485 /* space, possible "@+" prefix */
486 if(cur_len
+ strlen(target_p
->name
) + 3 >= BUFSIZE
- 3)
489 sendto_one(client_p
, "%s", lbuf
);
494 tlen
= rb_sprintf(t
, "%s%s ", find_channel_status(msptr
, stack
),
502 /* The old behaviour here was to always output our buffer,
503 * even if there are no clients we can show. This happens
504 * when a client does "NAMES" with no parameters, and all
505 * the clients on a -sp channel are +i. I dont see a good
506 * reason for keeping that behaviour, as it just wastes
512 sendto_one(client_p
, "%s", lbuf
);
517 sendto_one(client_p
, form_str(RPL_ENDOFNAMES
),
518 me
.name
, client_p
->name
, chptr
->chname
);
523 * input - channel to remove invite from, client to remove
525 * side effects - user is removed from invite list, if exists
528 del_invite(struct Channel
*chptr
, struct Client
*who
)
530 rb_dlinkFindDestroy(who
, &chptr
->invites
);
531 rb_dlinkFindDestroy(chptr
, &who
->user
->invited
);
536 * input - channel to check bans for, ban list (banlist or quietlist),
537 * user to check bans against, optional prebuilt buffers,
538 * optional forward channel pointer
539 * output - 1 if banned, else 0
543 is_banned_list(struct Channel
*chptr
, rb_dlink_list
*list
,
544 struct Client
*who
, struct membership
*msptr
,
545 const char *s
, const char *s2
, const char **forward
)
547 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
548 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
549 char src_althost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
550 char src_ip4host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
553 struct sockaddr_in ip4
;
555 struct Ban
*actualBan
= NULL
;
556 struct Ban
*actualExcept
= NULL
;
561 /* if the buffers havent been built, do it here */
564 rb_sprintf(src_host
, "%s!%s@%s", who
->name
, who
->username
, who
->host
);
565 rb_sprintf(src_iphost
, "%s!%s@%s", who
->name
, who
->username
, who
->sockhost
);
570 if(who
->localClient
->mangledhost
!= NULL
)
572 /* if host mangling mode enabled, also check their real host */
573 if(!strcmp(who
->host
, who
->localClient
->mangledhost
))
575 rb_sprintf(src_althost
, "%s!%s@%s", who
->name
, who
->username
, who
->orighost
);
578 /* if host mangling mode not enabled and no other spoof,
579 * also check the mangled form of their host */
580 else if (!IsDynSpoof(who
))
582 rb_sprintf(src_althost
, "%s!%s@%s", who
->name
, who
->username
, who
->localClient
->mangledhost
);
587 if(who
->localClient
->ip
.ss_family
== AF_INET6
&&
588 ipv4_from_ipv6((const struct sockaddr_in6
*)&who
->localClient
->ip
, &ip4
))
590 rb_sprintf(src_ip4host
, "%s!%s@", who
->name
, who
->username
);
591 s4
= src_ip4host
+ strlen(src_ip4host
);
592 rb_inet_ntop_sock((struct sockaddr
*)&ip4
,
593 s4
, src_ip4host
+ sizeof src_ip4host
- s4
);
598 RB_DLINK_FOREACH(ptr
, list
->head
)
600 actualBan
= ptr
->data
;
601 if(match(actualBan
->banstr
, s
) ||
602 match(actualBan
->banstr
, s2
) ||
603 match_cidr(actualBan
->banstr
, s2
) ||
604 match_extban(actualBan
->banstr
, who
, chptr
, CHFL_BAN
) ||
605 (s3
!= NULL
&& match(actualBan
->banstr
, s3
))
608 (s4
!= NULL
&& (match(actualBan
->banstr
, s4
) || match_cidr(actualBan
->banstr
, s4
)))
616 if((actualBan
!= NULL
) && ConfigChannel
.use_except
)
618 RB_DLINK_FOREACH(ptr
, chptr
->exceptlist
.head
)
620 actualExcept
= ptr
->data
;
622 /* theyre exempted.. */
623 if(match(actualExcept
->banstr
, s
) ||
624 match(actualExcept
->banstr
, s2
) ||
625 match_cidr(actualExcept
->banstr
, s2
) ||
626 match_extban(actualExcept
->banstr
, who
, chptr
, CHFL_EXCEPTION
) ||
627 (s3
!= NULL
&& match(actualExcept
->banstr
, s3
)))
629 /* cache the fact theyre not banned */
632 msptr
->bants
= chptr
->bants
;
633 msptr
->flags
&= ~CHFL_BANNED
;
636 return CHFL_EXCEPTION
;
641 /* cache the banned/not banned status */
644 msptr
->bants
= chptr
->bants
;
646 if(actualBan
!= NULL
)
648 msptr
->flags
|= CHFL_BANNED
;
653 msptr
->flags
&= ~CHFL_BANNED
;
658 if (actualBan
&& actualBan
->forward
&& forward
)
659 *forward
= actualBan
->forward
;
661 return ((actualBan
? CHFL_BAN
: 0));
666 * input - channel to check bans for, user to check bans against
667 * optional prebuilt buffers, optional forward channel pointer
668 * output - 1 if banned, else 0
672 is_banned(struct Channel
*chptr
, struct Client
*who
, struct membership
*msptr
,
673 const char *s
, const char *s2
, const char **forward
)
675 if (chptr
->last_checked_client
!= NULL
&&
676 who
== chptr
->last_checked_client
&&
677 chptr
->last_checked_type
== CHFL_BAN
&&
678 chptr
->last_checked_ts
> chptr
->bants
)
679 return chptr
->last_checked_result
;
681 chptr
->last_checked_client
= who
;
682 chptr
->last_checked_type
= CHFL_BAN
;
683 chptr
->last_checked_result
= is_banned_list(chptr
, &chptr
->banlist
, who
, msptr
, s
, s2
, forward
);
684 chptr
->last_checked_ts
= rb_current_time();
686 return chptr
->last_checked_result
;
691 * input - channel to check bans for, user to check bans against
692 * optional prebuilt buffers
693 * output - 1 if banned, else 0
697 is_quieted(struct Channel
*chptr
, struct Client
*who
, struct membership
*msptr
,
698 const char *s
, const char *s2
)
700 if (chptr
->last_checked_client
!= NULL
&&
701 who
== chptr
->last_checked_client
&&
702 chptr
->last_checked_type
== CHFL_QUIET
&&
703 chptr
->last_checked_ts
> chptr
->bants
)
704 return chptr
->last_checked_result
;
706 chptr
->last_checked_client
= who
;
707 chptr
->last_checked_type
= CHFL_QUIET
;
708 chptr
->last_checked_result
= is_banned_list(chptr
, &chptr
->quietlist
, who
, msptr
, s
, s2
, NULL
);
709 chptr
->last_checked_ts
= rb_current_time();
711 return chptr
->last_checked_result
;
716 * input - client to check, channel to check for, key
717 * output - reason for not being able to join, else 0, channel name to forward to
719 * caveats - this function should only be called on a local user.
722 can_join(struct Client
*source_p
, struct Channel
*chptr
, const char *key
, const char **forward
)
724 rb_dlink_node
*invite
= NULL
;
726 struct Ban
*invex
= NULL
;
727 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
728 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
729 char src_althost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
732 hook_data_channel moduledata
;
734 s_assert(source_p
->localClient
!= NULL
);
736 moduledata
.client
= source_p
;
737 moduledata
.chptr
= chptr
;
738 moduledata
.approved
= 0;
740 rb_sprintf(src_host
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->host
);
741 rb_sprintf(src_iphost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->sockhost
);
742 if(source_p
->localClient
->mangledhost
!= NULL
)
744 /* if host mangling mode enabled, also check their real host */
745 if(!strcmp(source_p
->host
, source_p
->localClient
->mangledhost
))
747 rb_sprintf(src_althost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->orighost
);
750 /* if host mangling mode not enabled and no other spoof,
751 * also check the mangled form of their host */
752 else if (!IsDynSpoof(source_p
))
754 rb_sprintf(src_althost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->localClient
->mangledhost
);
759 if((is_banned(chptr
, source_p
, NULL
, src_host
, src_iphost
, forward
)) == CHFL_BAN
)
761 moduledata
.approved
= ERR_BANNEDFROMCHAN
;
762 goto finish_join_check
;
765 if(*chptr
->mode
.key
&& (EmptyString(key
) || irccmp(chptr
->mode
.key
, key
)))
767 moduledata
.approved
= ERR_BADCHANNELKEY
;
768 goto finish_join_check
;
771 /* All checks from this point on will forward... */
773 *forward
= chptr
->mode
.forward
;
775 if(chptr
->mode
.mode
& MODE_INVITEONLY
)
777 RB_DLINK_FOREACH(invite
, source_p
->user
->invited
.head
)
779 if(invite
->data
== chptr
)
784 if(!ConfigChannel
.use_invex
)
785 moduledata
.approved
= ERR_INVITEONLYCHAN
;
786 RB_DLINK_FOREACH(ptr
, chptr
->invexlist
.head
)
789 if(match(invex
->banstr
, src_host
)
790 || match(invex
->banstr
, src_iphost
)
791 || match_cidr(invex
->banstr
, src_iphost
)
792 || match_extban(invex
->banstr
, source_p
, chptr
, CHFL_INVEX
)
793 || (use_althost
&& match(invex
->banstr
, src_althost
)))
797 moduledata
.approved
= ERR_INVITEONLYCHAN
;
801 if(chptr
->mode
.limit
&&
802 rb_dlink_list_length(&chptr
->members
) >= (unsigned long) chptr
->mode
.limit
)
803 i
= ERR_CHANNELISFULL
;
804 if(chptr
->mode
.mode
& MODE_REGONLY
&& EmptyString(source_p
->user
->suser
))
805 i
= ERR_NEEDREGGEDNICK
;
806 /* join throttling stuff --nenolod */
807 else if(chptr
->mode
.join_num
> 0 && chptr
->mode
.join_time
> 0)
809 if ((rb_current_time() - chptr
->join_delta
<=
810 chptr
->mode
.join_time
) && (chptr
->join_count
>=
811 chptr
->mode
.join_num
))
815 /* allow /invite to override +l/+r/+j also -- jilles */
816 if (i
!= 0 && invite
== NULL
)
818 RB_DLINK_FOREACH(invite
, source_p
->user
->invited
.head
)
820 if(invite
->data
== chptr
)
824 moduledata
.approved
= i
;
828 call_hook(h_can_join
, &moduledata
);
830 return moduledata
.approved
;
835 * input - user to check in channel, membership pointer
836 * output - whether can explicitly send or not, else CAN_SEND_NONOP
840 can_send(struct Channel
*chptr
, struct Client
*source_p
, struct membership
*msptr
)
842 hook_data_channel_approval moduledata
;
844 moduledata
.approved
= CAN_SEND_NONOP
;
845 moduledata
.dir
= MODE_QUERY
;
847 if(IsServer(source_p
) || IsService(source_p
))
850 if(MyClient(source_p
) && hash_find_resv(chptr
->chname
) &&
851 !IsOper(source_p
) && !IsExemptResv(source_p
))
852 moduledata
.approved
= CAN_SEND_NO
;
856 msptr
= find_channel_membership(chptr
, source_p
);
860 /* if its +m or +n and theyre not in the channel,
861 * they cant send. we dont check bans here because
862 * theres no possibility of caching them --fl
864 if(chptr
->mode
.mode
& MODE_NOPRIVMSGS
|| chptr
->mode
.mode
& MODE_MODERATED
)
865 moduledata
.approved
= CAN_SEND_NO
;
867 moduledata
.approved
= CAN_SEND_NONOP
;
869 return moduledata
.approved
;
873 if(chptr
->mode
.mode
& MODE_MODERATED
)
874 moduledata
.approved
= CAN_SEND_NO
;
876 if(MyClient(source_p
))
878 /* cached can_send */
879 if(msptr
->bants
== chptr
->bants
)
881 if(can_send_banned(msptr
))
882 moduledata
.approved
= CAN_SEND_NO
;
884 else if(is_banned(chptr
, source_p
, msptr
, NULL
, NULL
, NULL
) == CHFL_BAN
885 || is_quieted(chptr
, source_p
, msptr
, NULL
, NULL
) == CHFL_BAN
)
886 moduledata
.approved
= CAN_SEND_NO
;
889 if(is_chanop_voiced(msptr
))
890 moduledata
.approved
= CAN_SEND_OPV
;
892 moduledata
.client
= source_p
;
893 moduledata
.chptr
= msptr
->chptr
;
894 moduledata
.msptr
= msptr
;
895 moduledata
.target
= NULL
;
896 moduledata
.dir
= (moduledata
.approved
== CAN_SEND_NO
) ? MODE_ADD
: MODE_QUERY
;
898 call_hook(h_can_send
, &moduledata
);
900 return moduledata
.approved
;
904 * flood_attack_channel
905 * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
906 * says NOTICE must not auto reply
907 * - pointer to source Client
908 * - pointer to target channel
909 * output - 1 if target is under flood attack
910 * side effects - check for flood attack on target chptr
913 flood_attack_channel(int p_or_n
, struct Client
*source_p
, struct Channel
*chptr
, char *chname
)
917 if(GlobalSetOptions
.floodcount
&& MyClient(source_p
))
919 if((chptr
->first_received_message_time
+ 1) < rb_current_time())
921 delta
= rb_current_time() - chptr
->first_received_message_time
;
922 chptr
->received_number_of_privmsgs
-= delta
;
923 chptr
->first_received_message_time
= rb_current_time();
924 if(chptr
->received_number_of_privmsgs
<= 0)
926 chptr
->received_number_of_privmsgs
= 0;
927 chptr
->flood_noticed
= 0;
931 if((chptr
->received_number_of_privmsgs
>= GlobalSetOptions
.floodcount
)
932 || chptr
->flood_noticed
)
934 if(chptr
->flood_noticed
== 0)
936 sendto_realops_snomask(SNO_BOTS
, *chptr
->chname
== '&' ? L_ALL
: L_NETWIDE
,
937 "Possible Flooder %s[%s@%s] on %s target: %s",
938 source_p
->name
, source_p
->username
,
940 source_p
->servptr
->name
, chptr
->chname
);
941 chptr
->flood_noticed
= 1;
943 /* Add a bit of penalty */
944 chptr
->received_number_of_privmsgs
+= 2;
946 if(MyClient(source_p
) && (p_or_n
!= 1))
948 ":%s NOTICE %s :*** Message to %s throttled due to flooding",
949 me
.name
, source_p
->name
, chptr
->chname
);
953 chptr
->received_number_of_privmsgs
++;
959 /* find_bannickchange_channel()
960 * Input: client to check
961 * Output: channel preventing nick change
964 find_bannickchange_channel(struct Client
*client_p
)
966 struct Channel
*chptr
;
967 struct membership
*msptr
;
969 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
970 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
972 if (!MyClient(client_p
))
975 rb_sprintf(src_host
, "%s!%s@%s", client_p
->name
, client_p
->username
, client_p
->host
);
976 rb_sprintf(src_iphost
, "%s!%s@%s", client_p
->name
, client_p
->username
, client_p
->sockhost
);
978 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
981 chptr
= msptr
->chptr
;
982 if (is_chanop_voiced(msptr
))
984 /* cached can_send */
985 if (msptr
->bants
== chptr
->bants
)
987 if (can_send_banned(msptr
))
990 else if (is_banned(chptr
, client_p
, msptr
, src_host
, src_iphost
, NULL
) == CHFL_BAN
991 || is_quieted(chptr
, client_p
, msptr
, src_host
, src_iphost
) == CHFL_BAN
)
997 /* void check_spambot_warning(struct Client *source_p)
998 * Input: Client to check, channel name or NULL if this is a part.
1000 * Side-effects: Updates the client's oper_warn_count_down, warns the
1001 * IRC operators if necessary, and updates join_leave_countdown as
1005 check_spambot_warning(struct Client
*source_p
, const char *name
)
1008 int decrement_count
;
1009 if((GlobalSetOptions
.spam_num
&&
1010 (source_p
->localClient
->join_leave_count
>= GlobalSetOptions
.spam_num
)))
1012 if(source_p
->localClient
->oper_warn_count_down
> 0)
1013 source_p
->localClient
->oper_warn_count_down
--;
1015 source_p
->localClient
->oper_warn_count_down
= 0;
1016 if(source_p
->localClient
->oper_warn_count_down
== 0 &&
1019 /* Its already known as a possible spambot */
1020 sendto_realops_snomask(SNO_BOTS
, L_NETWIDE
,
1021 "User %s (%s@%s) trying to join %s is a possible spambot",
1023 source_p
->username
, source_p
->orighost
, name
);
1024 source_p
->localClient
->oper_warn_count_down
= OPER_SPAM_COUNTDOWN
;
1030 (rb_current_time() - source_p
->localClient
->last_leave_time
)) >
1031 JOIN_LEAVE_COUNT_EXPIRE_TIME
)
1033 decrement_count
= (t_delta
/ JOIN_LEAVE_COUNT_EXPIRE_TIME
);
1036 else if(decrement_count
> source_p
->localClient
->join_leave_count
)
1037 source_p
->localClient
->join_leave_count
= 0;
1039 source_p
->localClient
->join_leave_count
-= decrement_count
;
1043 if((rb_current_time() -
1044 (source_p
->localClient
->last_join_time
)) < GlobalSetOptions
.spam_time
)
1046 /* oh, its a possible spambot */
1047 source_p
->localClient
->join_leave_count
++;
1051 source_p
->localClient
->last_join_time
= rb_current_time();
1053 source_p
->localClient
->last_leave_time
= rb_current_time();
1057 /* check_splitmode()
1061 * side effects - compares usercount and servercount against their split
1062 * values and adjusts splitmode accordingly
1065 check_splitmode(void *unused
)
1067 if(splitchecking
&& (ConfigChannel
.no_join_on_split
|| ConfigChannel
.no_create_on_split
))
1069 /* not split, we're being asked to check now because someone
1074 if(eob_count
< split_servers
|| Count
.total
< split_users
)
1077 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1078 "Network split, activating splitmode");
1079 check_splitmode_ev
= rb_event_addish("check_splitmode", check_splitmode
, NULL
, 2);
1082 /* in splitmode, check whether its finished */
1083 else if(eob_count
>= split_servers
&& Count
.total
>= split_users
)
1087 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1088 "Network rejoined, deactivating splitmode");
1090 rb_event_delete(check_splitmode_ev
);
1091 check_splitmode_ev
= NULL
;
1099 * input - channel to allocate topic for
1100 * output - 1 on success, else 0
1101 * side effects - channel gets a topic allocated
1104 allocate_topic(struct Channel
*chptr
)
1111 ptr
= rb_bh_alloc(topic_heap
);
1113 /* Basically we allocate one large block for the topic and
1114 * the topic info. We then split it up into two and shove it
1118 chptr
->topic_info
= (char *) ptr
+ TOPICLEN
+ 1;
1119 *chptr
->topic
= '\0';
1120 *chptr
->topic_info
= '\0';
1125 * input - channel which has topic to free
1127 * side effects - channels topic is free'd
1130 free_topic(struct Channel
*chptr
)
1134 if(chptr
== NULL
|| chptr
->topic
== NULL
)
1137 /* This is safe for now - If you change allocate_topic you
1138 * MUST change this as well
1141 rb_bh_free(topic_heap
, ptr
);
1142 chptr
->topic
= NULL
;
1143 chptr
->topic_info
= NULL
;
1146 /* set_channel_topic()
1148 * input - channel, topic to set, topic info and topic ts
1150 * side effects - channels topic, topic info and TS are set.
1153 set_channel_topic(struct Channel
*chptr
, const char *topic
, const char *topic_info
, time_t topicts
)
1155 if(strlen(topic
) > 0)
1157 if(chptr
->topic
== NULL
)
1158 allocate_topic(chptr
);
1159 rb_strlcpy(chptr
->topic
, topic
, TOPICLEN
+ 1);
1160 rb_strlcpy(chptr
->topic_info
, topic_info
, USERHOST_REPLYLEN
);
1161 chptr
->topic_time
= topicts
;
1163 if (ConfigChannel
.strip_topic_colors
)
1164 strip_colour(chptr
->topic
);
1168 if(chptr
->topic
!= NULL
)
1170 chptr
->topic_time
= 0;
1176 * inputs - pointer to channel
1177 * - pointer to client
1178 * output - string with simple modes
1179 * side effects - result from previous calls overwritten
1181 * Stolen from ShadowIRCd 4 --nenolod
1184 channel_modes(struct Channel
*chptr
, struct Client
*client_p
)
1189 static char final
[BUFSIZE
];
1196 for (i
= 0; i
< 256; i
++)
1198 if(chmode_table
[i
].set_func
== chm_hidden
&& (!IsOper(client_p
) || !IsClient(client_p
)))
1200 if(chptr
->mode
.mode
& chmode_flags
[i
])
1204 if(chptr
->mode
.limit
)
1208 if(!IsClient(client_p
) || IsMember(client_p
, chptr
))
1209 pbuf
+= rb_sprintf(pbuf
, " %d", chptr
->mode
.limit
);
1212 if(*chptr
->mode
.key
)
1216 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1217 pbuf
+= rb_sprintf(pbuf
, " %s", chptr
->mode
.key
);
1220 if(chptr
->mode
.join_num
)
1224 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1225 pbuf
+= rb_sprintf(pbuf
, " %d:%d", chptr
->mode
.join_num
,
1226 chptr
->mode
.join_time
);
1229 if(*chptr
->mode
.forward
&&
1230 (ConfigChannel
.use_forward
|| !IsClient(client_p
)))
1234 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1235 pbuf
+= rb_sprintf(pbuf
, " %s", chptr
->mode
.forward
);
1240 rb_strlcpy(final
, buf1
, sizeof final
);
1241 rb_strlcat(final
, buf2
, sizeof final
);
1245 /* void send_cap_mode_changes(struct Client *client_p,
1246 * struct Client *source_p,
1247 * struct Channel *chptr, int cap, int nocap)
1248 * Input: The client sending(client_p), the source client(source_p),
1249 * the channel to send mode changes for(chptr)
1251 * Side-effects: Sends the appropriate mode changes to capable servers.
1253 * Reverted back to my original design, except that we now keep a count
1254 * of the number of servers which each combination as an optimisation, so
1255 * the capabs combinations which are not needed are not worked out. -A1kmm
1257 * Removed most code here because we don't need to be compatible with ircd
1258 * 2.8.21+CSr and stuff. --nenolod
1261 send_cap_mode_changes(struct Client
*client_p
, struct Client
*source_p
,
1262 struct Channel
*chptr
, struct ChModeChange mode_changes
[], int mode_count
)
1264 static char modebuf
[BUFSIZE
];
1265 static char parabuf
[BUFSIZE
];
1266 int i
, mbl
, pbl
, nc
, mc
, preflen
, len
;
1272 /* Now send to servers... */
1280 mbl
= preflen
= rb_sprintf(modebuf
, ":%s TMODE %ld %s ",
1281 use_id(source_p
), (long) chptr
->channelts
,
1284 /* loop the list of - modes we have */
1285 for (i
= 0; i
< mode_count
; i
++)
1287 /* if they dont support the cap we need, or they do support a cap they
1288 * cant have, then dont add it to the modebuf.. that way they wont see
1291 if (mode_changes
[i
].letter
== 0)
1294 if (!EmptyString(mode_changes
[i
].id
))
1295 arg
= mode_changes
[i
].id
;
1297 arg
= mode_changes
[i
].arg
;
1301 arglen
= strlen(arg
);
1303 /* dont even think about it! --fl */
1304 if(arglen
> MODEBUFLEN
- 5)
1308 /* if we're creeping past the buf size, we need to send it and make
1309 * another line for the other modes
1310 * XXX - this could give away server topology with uids being
1311 * different lengths, but not much we can do, except possibly break
1312 * them as if they were the longest of the nick or uid at all times,
1313 * which even then won't work as we don't always know the uid -A1kmm.
1315 if(arg
&& ((mc
== MAXMODEPARAMSSERV
) ||
1316 ((mbl
+ pbl
+ arglen
+ 4) > (BUFSIZE
- 3))))
1319 sendto_server(client_p
, chptr
, NOCAPS
, NOCAPS
,
1320 "%s %s", modebuf
, parabuf
);
1331 if(dir
!= mode_changes
[i
].dir
)
1333 modebuf
[mbl
++] = (mode_changes
[i
].dir
== MODE_ADD
) ? '+' : '-';
1334 dir
= mode_changes
[i
].dir
;
1337 modebuf
[mbl
++] = mode_changes
[i
].letter
;
1343 len
= rb_sprintf(pbuf
, "%s ", arg
);
1350 if(pbl
&& parabuf
[pbl
- 1] == ' ')
1351 parabuf
[pbl
- 1] = 0;
1354 sendto_server(client_p
, chptr
, NOCAPS
, NOCAPS
, "%s %s", modebuf
, parabuf
);
1358 resv_chan_forcepart(const char *name
, const char *reason
, int temp_time
)
1361 rb_dlink_node
*next_ptr
;
1362 struct Channel
*chptr
;
1363 struct membership
*msptr
;
1364 struct Client
*target_p
;
1366 if(!ConfigChannel
.resv_forcepart
)
1369 /* for each user on our server in the channel list
1370 * send them a PART, and notify opers.
1372 chptr
= find_channel(name
);
1375 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, chptr
->locmembers
.head
)
1378 target_p
= msptr
->client_p
;
1380 if(IsExemptResv(target_p
))
1383 sendto_server(target_p
, chptr
, CAP_TS6
, NOCAPS
,
1384 ":%s PART %s", target_p
->id
, chptr
->chname
);
1386 sendto_channel_local(ALL_MEMBERS
, chptr
, ":%s!%s@%s PART %s :%s",
1387 target_p
->name
, target_p
->username
,
1388 target_p
->host
, chptr
->chname
, target_p
->name
);
1390 remove_user_from_channel(msptr
);
1392 /* notify opers & user they were removed from the channel */
1393 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1394 "Forced PART for %s!%s@%s from %s (%s)",
1395 target_p
->name
, target_p
->username
,
1396 target_p
->host
, name
, reason
);
1399 sendto_one_notice(target_p
, ":*** Channel %s is temporarily unavailable on this server.",
1402 sendto_one_notice(target_p
, ":*** Channel %s is no longer available on this server.",