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
34 #include "s_serv.h" /* captab */
38 #include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
39 #include "s_newconf.h"
41 #include "ipv4_from_ipv6.h"
44 struct config_channel_entry ConfigChannel
;
45 rb_dlink_list global_channel_list
;
46 static rb_bh
*channel_heap
;
47 static rb_bh
*ban_heap
;
48 static rb_bh
*topic_heap
;
49 static rb_bh
*member_heap
;
51 static void free_topic(struct Channel
*chptr
);
53 static int h_can_join
;
54 static int h_can_send
;
55 int h_get_channel_access
;
61 * side effects - initialises the various blockheaps
66 channel_heap
= rb_bh_create(sizeof(struct Channel
), CHANNEL_HEAP_SIZE
, "channel_heap");
67 ban_heap
= rb_bh_create(sizeof(struct Ban
), BAN_HEAP_SIZE
, "ban_heap");
68 topic_heap
= rb_bh_create(TOPICLEN
+ 1 + USERHOST_REPLYLEN
, TOPIC_HEAP_SIZE
, "topic_heap");
69 member_heap
= rb_bh_create(sizeof(struct membership
), MEMBER_HEAP_SIZE
, "member_heap");
71 h_can_join
= register_hook("can_join");
72 h_can_send
= register_hook("can_send");
73 h_get_channel_access
= register_hook("get_channel_access");
77 * allocate_channel - Allocates a channel
80 allocate_channel(const char *chname
)
82 struct Channel
*chptr
;
83 chptr
= rb_bh_alloc(channel_heap
);
84 chptr
->chname
= rb_strdup(chname
);
89 free_channel(struct Channel
*chptr
)
91 rb_free(chptr
->chname
);
92 rb_free(chptr
->mode_lock
);
93 rb_bh_free(channel_heap
, chptr
);
97 allocate_ban(const char *banstr
, const char *who
, const char *forward
)
100 bptr
= rb_bh_alloc(ban_heap
);
101 bptr
->banstr
= rb_strdup(banstr
);
102 bptr
->who
= rb_strdup(who
);
103 bptr
->forward
= forward
? rb_strdup(forward
) : NULL
;
109 free_ban(struct Ban
*bptr
)
111 rb_free(bptr
->banstr
);
113 rb_free(bptr
->forward
);
114 rb_bh_free(ban_heap
, bptr
);
118 * send_channel_join()
120 * input - channel to join, client joining.
122 * side effects - none
125 send_channel_join(struct Channel
*chptr
, struct Client
*client_p
)
127 if (!IsClient(client_p
))
130 sendto_channel_local_with_capability(ALL_MEMBERS
, NOCAPS
, CLICAP_EXTENDED_JOIN
, chptr
, ":%s!%s@%s JOIN %s",
131 client_p
->name
, client_p
->username
, client_p
->host
, chptr
->chname
);
133 sendto_channel_local_with_capability(ALL_MEMBERS
, CLICAP_EXTENDED_JOIN
, NOCAPS
, chptr
, ":%s!%s@%s JOIN %s %s :%s",
134 client_p
->name
, client_p
->username
, client_p
->host
, chptr
->chname
,
135 EmptyString(client_p
->user
->suser
) ? "*" : client_p
->user
->suser
,
138 /* Send away message to away-notify enabled clients. */
139 if (client_p
->user
->away
)
140 sendto_channel_local_with_capability_butone(client_p
, ALL_MEMBERS
, CLICAP_AWAY_NOTIFY
, NOCAPS
, chptr
,
141 ":%s!%s@%s AWAY :%s", client_p
->name
, client_p
->username
,
142 client_p
->host
, client_p
->user
->away
);
145 /* find_channel_membership()
147 * input - channel to find them in, client to find
148 * output - membership of client in channel, else NULL
152 find_channel_membership(struct Channel
*chptr
, struct Client
*client_p
)
154 struct membership
*msptr
;
157 if(!IsClient(client_p
))
160 /* Pick the most efficient list to use to be nice to things like
161 * CHANSERV which could be in a large number of channels
163 if(rb_dlink_list_length(&chptr
->members
) < rb_dlink_list_length(&client_p
->user
->channel
))
165 RB_DLINK_FOREACH(ptr
, chptr
->members
.head
)
169 if(msptr
->client_p
== client_p
)
175 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
179 if(msptr
->chptr
== chptr
)
187 /* find_channel_status()
189 * input - membership to get status for, whether we can combine flags
190 * output - flags of user on channel
194 find_channel_status(struct membership
*msptr
, int combine
)
196 static char buffer
[3];
215 /* add_user_to_channel()
217 * input - channel to add client to, client to add, channel flags
219 * side effects - user is added to channel
222 add_user_to_channel(struct Channel
*chptr
, struct Client
*client_p
, int flags
)
224 struct membership
*msptr
;
226 s_assert(client_p
->user
!= NULL
);
227 if(client_p
->user
== NULL
)
230 msptr
= rb_bh_alloc(member_heap
);
232 msptr
->chptr
= chptr
;
233 msptr
->client_p
= client_p
;
234 msptr
->flags
= flags
;
236 rb_dlinkAdd(msptr
, &msptr
->usernode
, &client_p
->user
->channel
);
237 rb_dlinkAdd(msptr
, &msptr
->channode
, &chptr
->members
);
239 if(MyClient(client_p
))
240 rb_dlinkAdd(msptr
, &msptr
->locchannode
, &chptr
->locmembers
);
243 /* remove_user_from_channel()
245 * input - membership pointer to remove from channel
247 * side effects - membership (thus user) is removed from channel
250 remove_user_from_channel(struct membership
*msptr
)
252 struct Client
*client_p
;
253 struct Channel
*chptr
;
254 s_assert(msptr
!= NULL
);
258 client_p
= msptr
->client_p
;
259 chptr
= msptr
->chptr
;
261 rb_dlinkDelete(&msptr
->usernode
, &client_p
->user
->channel
);
262 rb_dlinkDelete(&msptr
->channode
, &chptr
->members
);
264 if(client_p
->servptr
== &me
)
265 rb_dlinkDelete(&msptr
->locchannode
, &chptr
->locmembers
);
267 if(!(chptr
->mode
.mode
& MODE_PERMANENT
) && rb_dlink_list_length(&chptr
->members
) <= 0)
268 destroy_channel(chptr
);
270 rb_bh_free(member_heap
, msptr
);
275 /* remove_user_from_channels()
277 * input - user to remove from all channels
279 * side effects - user is removed from all channels
282 remove_user_from_channels(struct Client
*client_p
)
284 struct Channel
*chptr
;
285 struct membership
*msptr
;
287 rb_dlink_node
*next_ptr
;
292 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, client_p
->user
->channel
.head
)
295 chptr
= msptr
->chptr
;
297 rb_dlinkDelete(&msptr
->channode
, &chptr
->members
);
299 if(client_p
->servptr
== &me
)
300 rb_dlinkDelete(&msptr
->locchannode
, &chptr
->locmembers
);
302 if(!(chptr
->mode
.mode
& MODE_PERMANENT
) && rb_dlink_list_length(&chptr
->members
) <= 0)
303 destroy_channel(chptr
);
305 rb_bh_free(member_heap
, msptr
);
308 client_p
->user
->channel
.head
= client_p
->user
->channel
.tail
= NULL
;
309 client_p
->user
->channel
.length
= 0;
312 /* invalidate_bancache_user()
314 * input - user to invalidate ban cache for
316 * side effects - ban cache is invalidated for all memberships of that user
317 * to be used after a nick change
320 invalidate_bancache_user(struct Client
*client_p
)
322 struct membership
*msptr
;
328 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
332 msptr
->flags
&= ~CHFL_BANNED
;
336 /* check_channel_name()
338 * input - channel name
339 * output - true if valid channel name, else false
343 check_channel_name(const char *name
)
345 s_assert(name
!= NULL
);
349 for (; *name
; ++name
)
351 if(!IsChanChar(*name
))
358 /* free_channel_list()
360 * input - rb_dlink list to free
362 * side effects - list of b/e/I modes is cleared
365 free_channel_list(rb_dlink_list
* list
)
368 rb_dlink_node
*next_ptr
;
369 struct Ban
*actualBan
;
371 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, list
->head
)
373 actualBan
= ptr
->data
;
377 list
->head
= list
->tail
= NULL
;
383 * input - channel to destroy
385 * side effects - channel is obliterated
388 destroy_channel(struct Channel
*chptr
)
390 rb_dlink_node
*ptr
, *next_ptr
;
392 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, chptr
->invites
.head
)
394 del_invite(chptr
, ptr
->data
);
397 /* free all bans/exceptions/denies */
398 free_channel_list(&chptr
->banlist
);
399 free_channel_list(&chptr
->exceptlist
);
400 free_channel_list(&chptr
->invexlist
);
401 free_channel_list(&chptr
->quietlist
);
406 rb_dlinkDelete(&chptr
->node
, &global_channel_list
);
407 del_from_channel_hash(chptr
->chname
, chptr
);
411 /* channel_pub_or_secret()
414 * output - "=" if public, "@" if secret, else "*"
418 channel_pub_or_secret(struct Channel
*chptr
)
420 if(PubChannel(chptr
))
422 else if(SecretChannel(chptr
))
427 /* channel_member_names()
429 * input - channel to list, client to list to, show endofnames
431 * side effects - client is given list of users on channel
434 channel_member_names(struct Channel
*chptr
, struct Client
*client_p
, int show_eon
)
436 struct membership
*msptr
;
437 struct Client
*target_p
;
445 int stack
= IsCapable(client_p
, CLICAP_MULTI_PREFIX
);
447 if(ShowChannel(client_p
, chptr
))
449 is_member
= IsMember(client_p
, chptr
);
451 cur_len
= mlen
= sprintf(lbuf
, form_str(RPL_NAMREPLY
),
452 me
.name
, client_p
->name
,
453 channel_pub_or_secret(chptr
), chptr
->chname
);
457 RB_DLINK_FOREACH(ptr
, chptr
->members
.head
)
460 target_p
= msptr
->client_p
;
462 if(IsInvisible(target_p
) && !is_member
)
465 if (IsCapable(client_p
, CLICAP_USERHOST_IN_NAMES
))
467 /* space, possible "@+" prefix */
468 if (cur_len
+ strlen(target_p
->name
) + strlen(target_p
->username
) + strlen(target_p
->host
) + 5 >= BUFSIZE
- 5)
471 sendto_one(client_p
, "%s", lbuf
);
476 tlen
= sprintf(t
, "%s%s!%s@%s ", find_channel_status(msptr
, stack
),
477 target_p
->name
, target_p
->username
, target_p
->host
);
481 /* space, possible "@+" prefix */
482 if(cur_len
+ strlen(target_p
->name
) + 3 >= BUFSIZE
- 3)
485 sendto_one(client_p
, "%s", lbuf
);
490 tlen
= sprintf(t
, "%s%s ", find_channel_status(msptr
, stack
),
498 /* The old behaviour here was to always output our buffer,
499 * even if there are no clients we can show. This happens
500 * when a client does "NAMES" with no parameters, and all
501 * the clients on a -sp channel are +i. I dont see a good
502 * reason for keeping that behaviour, as it just wastes
508 sendto_one(client_p
, "%s", lbuf
);
513 sendto_one(client_p
, form_str(RPL_ENDOFNAMES
),
514 me
.name
, client_p
->name
, chptr
->chname
);
519 * input - channel to remove invite from, client to remove
521 * side effects - user is removed from invite list, if exists
524 del_invite(struct Channel
*chptr
, struct Client
*who
)
526 rb_dlinkFindDestroy(who
, &chptr
->invites
);
527 rb_dlinkFindDestroy(chptr
, &who
->user
->invited
);
532 * input - channel to check bans for, ban list (banlist or quietlist),
533 * user to check bans against, optional prebuilt buffers,
534 * optional forward channel pointer
535 * output - 1 if banned, else 0
539 is_banned_list(struct Channel
*chptr
, rb_dlink_list
*list
,
540 struct Client
*who
, struct membership
*msptr
,
541 const char *s
, const char *s2
, const char **forward
)
543 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
544 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
545 char src_althost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
546 char src_ip4host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
549 struct sockaddr_in ip4
;
551 struct Ban
*actualBan
= NULL
;
552 struct Ban
*actualExcept
= NULL
;
557 /* if the buffers havent been built, do it here */
560 sprintf(src_host
, "%s!%s@%s", who
->name
, who
->username
, who
->host
);
561 sprintf(src_iphost
, "%s!%s@%s", who
->name
, who
->username
, who
->sockhost
);
566 if(who
->localClient
->mangledhost
!= NULL
)
568 /* if host mangling mode enabled, also check their real host */
569 if(!strcmp(who
->host
, who
->localClient
->mangledhost
))
571 sprintf(src_althost
, "%s!%s@%s", who
->name
, who
->username
, who
->orighost
);
574 /* if host mangling mode not enabled and no other spoof,
575 * also check the mangled form of their host */
576 else if (!IsDynSpoof(who
))
578 sprintf(src_althost
, "%s!%s@%s", who
->name
, who
->username
, who
->localClient
->mangledhost
);
583 if(GET_SS_FAMILY(&who
->localClient
->ip
) == AF_INET6
&&
584 ipv4_from_ipv6((const struct sockaddr_in6
*)&who
->localClient
->ip
, &ip4
))
586 sprintf(src_ip4host
, "%s!%s@", who
->name
, who
->username
);
587 s4
= src_ip4host
+ strlen(src_ip4host
);
588 rb_inet_ntop_sock((struct sockaddr
*)&ip4
,
589 s4
, src_ip4host
+ sizeof src_ip4host
- s4
);
594 RB_DLINK_FOREACH(ptr
, list
->head
)
596 actualBan
= ptr
->data
;
597 if(match(actualBan
->banstr
, s
) ||
598 match(actualBan
->banstr
, s2
) ||
599 match_cidr(actualBan
->banstr
, s2
) ||
600 match_extban(actualBan
->banstr
, who
, chptr
, CHFL_BAN
) ||
601 (s3
!= NULL
&& match(actualBan
->banstr
, s3
))
604 (s4
!= NULL
&& (match(actualBan
->banstr
, s4
) || match_cidr(actualBan
->banstr
, s4
)))
612 if((actualBan
!= NULL
) && ConfigChannel
.use_except
)
614 RB_DLINK_FOREACH(ptr
, chptr
->exceptlist
.head
)
616 actualExcept
= ptr
->data
;
618 /* theyre exempted.. */
619 if(match(actualExcept
->banstr
, s
) ||
620 match(actualExcept
->banstr
, s2
) ||
621 match_cidr(actualExcept
->banstr
, s2
) ||
622 match_extban(actualExcept
->banstr
, who
, chptr
, CHFL_EXCEPTION
) ||
623 (s3
!= NULL
&& match(actualExcept
->banstr
, s3
)))
625 /* cache the fact theyre not banned */
628 msptr
->bants
= chptr
->bants
;
629 msptr
->flags
&= ~CHFL_BANNED
;
632 return CHFL_EXCEPTION
;
637 /* cache the banned/not banned status */
640 msptr
->bants
= chptr
->bants
;
642 if(actualBan
!= NULL
)
644 msptr
->flags
|= CHFL_BANNED
;
649 msptr
->flags
&= ~CHFL_BANNED
;
654 if (actualBan
&& actualBan
->forward
&& forward
)
655 *forward
= actualBan
->forward
;
657 return ((actualBan
? CHFL_BAN
: 0));
662 * input - channel to check bans for, user to check bans against
663 * optional prebuilt buffers, optional forward channel pointer
664 * output - 1 if banned, else 0
668 is_banned(struct Channel
*chptr
, struct Client
*who
, struct membership
*msptr
,
669 const char *s
, const char *s2
, const char **forward
)
671 if (chptr
->last_checked_client
!= NULL
&&
672 who
== chptr
->last_checked_client
&&
673 chptr
->last_checked_type
== CHFL_BAN
&&
674 chptr
->last_checked_ts
> chptr
->bants
)
675 return chptr
->last_checked_result
;
677 chptr
->last_checked_client
= who
;
678 chptr
->last_checked_type
= CHFL_BAN
;
679 chptr
->last_checked_result
= is_banned_list(chptr
, &chptr
->banlist
, who
, msptr
, s
, s2
, forward
);
680 chptr
->last_checked_ts
= rb_current_time();
682 return chptr
->last_checked_result
;
687 * input - channel to check bans for, user to check bans against
688 * optional prebuilt buffers
689 * output - 1 if banned, else 0
693 is_quieted(struct Channel
*chptr
, struct Client
*who
, struct membership
*msptr
,
694 const char *s
, const char *s2
)
696 if (chptr
->last_checked_client
!= NULL
&&
697 who
== chptr
->last_checked_client
&&
698 chptr
->last_checked_type
== CHFL_QUIET
&&
699 chptr
->last_checked_ts
> chptr
->bants
)
700 return chptr
->last_checked_result
;
702 chptr
->last_checked_client
= who
;
703 chptr
->last_checked_type
= CHFL_QUIET
;
704 chptr
->last_checked_result
= is_banned_list(chptr
, &chptr
->quietlist
, who
, msptr
, s
, s2
, NULL
);
705 chptr
->last_checked_ts
= rb_current_time();
707 return chptr
->last_checked_result
;
712 * input - client to check, channel to check for, key
713 * output - reason for not being able to join, else 0, channel name to forward to
715 * caveats - this function should only be called on a local user.
718 can_join(struct Client
*source_p
, struct Channel
*chptr
, const char *key
, const char **forward
)
720 rb_dlink_node
*invite
= NULL
;
722 struct Ban
*invex
= NULL
;
723 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
724 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
725 char src_althost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
728 hook_data_channel moduledata
;
730 s_assert(source_p
->localClient
!= NULL
);
732 moduledata
.client
= source_p
;
733 moduledata
.chptr
= chptr
;
734 moduledata
.approved
= 0;
736 sprintf(src_host
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->host
);
737 sprintf(src_iphost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->sockhost
);
738 if(source_p
->localClient
->mangledhost
!= NULL
)
740 /* if host mangling mode enabled, also check their real host */
741 if(!strcmp(source_p
->host
, source_p
->localClient
->mangledhost
))
743 sprintf(src_althost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->orighost
);
746 /* if host mangling mode not enabled and no other spoof,
747 * also check the mangled form of their host */
748 else if (!IsDynSpoof(source_p
))
750 sprintf(src_althost
, "%s!%s@%s", source_p
->name
, source_p
->username
, source_p
->localClient
->mangledhost
);
755 if((is_banned(chptr
, source_p
, NULL
, src_host
, src_iphost
, forward
)) == CHFL_BAN
)
757 moduledata
.approved
= ERR_BANNEDFROMCHAN
;
758 goto finish_join_check
;
761 if(*chptr
->mode
.key
&& (EmptyString(key
) || irccmp(chptr
->mode
.key
, key
)))
763 moduledata
.approved
= ERR_BADCHANNELKEY
;
764 goto finish_join_check
;
767 /* All checks from this point on will forward... */
769 *forward
= chptr
->mode
.forward
;
771 if(chptr
->mode
.mode
& MODE_INVITEONLY
)
773 RB_DLINK_FOREACH(invite
, source_p
->user
->invited
.head
)
775 if(invite
->data
== chptr
)
780 if(!ConfigChannel
.use_invex
)
781 moduledata
.approved
= ERR_INVITEONLYCHAN
;
782 RB_DLINK_FOREACH(ptr
, chptr
->invexlist
.head
)
785 if(match(invex
->banstr
, src_host
)
786 || match(invex
->banstr
, src_iphost
)
787 || match_cidr(invex
->banstr
, src_iphost
)
788 || match_extban(invex
->banstr
, source_p
, chptr
, CHFL_INVEX
)
789 || (use_althost
&& match(invex
->banstr
, src_althost
)))
793 moduledata
.approved
= ERR_INVITEONLYCHAN
;
797 if(chptr
->mode
.limit
&&
798 rb_dlink_list_length(&chptr
->members
) >= (unsigned long) chptr
->mode
.limit
)
799 i
= ERR_CHANNELISFULL
;
800 if(chptr
->mode
.mode
& MODE_REGONLY
&& EmptyString(source_p
->user
->suser
))
801 i
= ERR_NEEDREGGEDNICK
;
802 /* join throttling stuff --nenolod */
803 else if(chptr
->mode
.join_num
> 0 && chptr
->mode
.join_time
> 0)
805 if ((rb_current_time() - chptr
->join_delta
<=
806 chptr
->mode
.join_time
) && (chptr
->join_count
>=
807 chptr
->mode
.join_num
))
811 /* allow /invite to override +l/+r/+j also -- jilles */
812 if (i
!= 0 && invite
== NULL
)
814 RB_DLINK_FOREACH(invite
, source_p
->user
->invited
.head
)
816 if(invite
->data
== chptr
)
820 moduledata
.approved
= i
;
824 call_hook(h_can_join
, &moduledata
);
826 return moduledata
.approved
;
831 * input - user to check in channel, membership pointer
832 * output - whether can explicitly send or not, else CAN_SEND_NONOP
836 can_send(struct Channel
*chptr
, struct Client
*source_p
, struct membership
*msptr
)
838 hook_data_channel_approval moduledata
;
840 moduledata
.approved
= CAN_SEND_NONOP
;
841 moduledata
.dir
= MODE_QUERY
;
843 if(IsServer(source_p
) || IsService(source_p
))
846 if(MyClient(source_p
) && hash_find_resv(chptr
->chname
) &&
847 !IsOper(source_p
) && !IsExemptResv(source_p
))
848 moduledata
.approved
= CAN_SEND_NO
;
852 msptr
= find_channel_membership(chptr
, source_p
);
856 /* if its +m or +n and theyre not in the channel,
857 * they cant send. we dont check bans here because
858 * theres no possibility of caching them --fl
860 if(chptr
->mode
.mode
& MODE_NOPRIVMSGS
|| chptr
->mode
.mode
& MODE_MODERATED
)
861 moduledata
.approved
= CAN_SEND_NO
;
863 moduledata
.approved
= CAN_SEND_NONOP
;
865 return moduledata
.approved
;
869 if(chptr
->mode
.mode
& MODE_MODERATED
)
870 moduledata
.approved
= CAN_SEND_NO
;
872 if(MyClient(source_p
))
874 /* cached can_send */
875 if(msptr
->bants
== chptr
->bants
)
877 if(can_send_banned(msptr
))
878 moduledata
.approved
= CAN_SEND_NO
;
880 else if(is_banned(chptr
, source_p
, msptr
, NULL
, NULL
, NULL
) == CHFL_BAN
881 || is_quieted(chptr
, source_p
, msptr
, NULL
, NULL
) == CHFL_BAN
)
882 moduledata
.approved
= CAN_SEND_NO
;
885 if(is_chanop_voiced(msptr
))
886 moduledata
.approved
= CAN_SEND_OPV
;
888 moduledata
.client
= source_p
;
889 moduledata
.chptr
= msptr
->chptr
;
890 moduledata
.msptr
= msptr
;
891 moduledata
.target
= NULL
;
892 moduledata
.dir
= (moduledata
.approved
== CAN_SEND_NO
) ? MODE_ADD
: MODE_QUERY
;
894 call_hook(h_can_send
, &moduledata
);
896 return moduledata
.approved
;
900 * flood_attack_channel
901 * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
902 * says NOTICE must not auto reply
903 * - pointer to source Client
904 * - pointer to target channel
905 * output - true if target is under flood attack
906 * side effects - check for flood attack on target chptr
909 flood_attack_channel(int p_or_n
, struct Client
*source_p
, struct Channel
*chptr
, char *chname
)
913 if(GlobalSetOptions
.floodcount
&& MyClient(source_p
))
915 if((chptr
->first_received_message_time
+ 1) < rb_current_time())
917 delta
= rb_current_time() - chptr
->first_received_message_time
;
918 chptr
->received_number_of_privmsgs
-= delta
;
919 chptr
->first_received_message_time
= rb_current_time();
920 if(chptr
->received_number_of_privmsgs
<= 0)
922 chptr
->received_number_of_privmsgs
= 0;
923 chptr
->flood_noticed
= 0;
927 if((chptr
->received_number_of_privmsgs
>= GlobalSetOptions
.floodcount
)
928 || chptr
->flood_noticed
)
930 if(chptr
->flood_noticed
== 0)
932 sendto_realops_snomask(SNO_BOTS
, *chptr
->chname
== '&' ? L_ALL
: L_NETWIDE
,
933 "Possible Flooder %s[%s@%s] on %s target: %s",
934 source_p
->name
, source_p
->username
,
936 source_p
->servptr
->name
, chptr
->chname
);
937 chptr
->flood_noticed
= 1;
939 /* Add a bit of penalty */
940 chptr
->received_number_of_privmsgs
+= 2;
942 if(MyClient(source_p
) && (p_or_n
!= 1))
944 ":%s NOTICE %s :*** Message to %s throttled due to flooding",
945 me
.name
, source_p
->name
, chptr
->chname
);
949 chptr
->received_number_of_privmsgs
++;
955 /* find_bannickchange_channel()
956 * Input: client to check
957 * Output: channel preventing nick change
960 find_bannickchange_channel(struct Client
*client_p
)
962 struct Channel
*chptr
;
963 struct membership
*msptr
;
965 char src_host
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
966 char src_iphost
[NICKLEN
+ USERLEN
+ HOSTLEN
+ 6];
968 if (!MyClient(client_p
))
971 sprintf(src_host
, "%s!%s@%s", client_p
->name
, client_p
->username
, client_p
->host
);
972 sprintf(src_iphost
, "%s!%s@%s", client_p
->name
, client_p
->username
, client_p
->sockhost
);
974 RB_DLINK_FOREACH(ptr
, client_p
->user
->channel
.head
)
977 chptr
= msptr
->chptr
;
978 if (is_chanop_voiced(msptr
))
980 /* cached can_send */
981 if (msptr
->bants
== chptr
->bants
)
983 if (can_send_banned(msptr
))
986 else if (is_banned(chptr
, client_p
, msptr
, src_host
, src_iphost
, NULL
) == CHFL_BAN
987 || is_quieted(chptr
, client_p
, msptr
, src_host
, src_iphost
) == CHFL_BAN
)
993 /* void check_spambot_warning(struct Client *source_p)
994 * Input: Client to check, channel name or NULL if this is a part.
996 * Side-effects: Updates the client's oper_warn_count_down, warns the
997 * IRC operators if necessary, and updates join_leave_countdown as
1001 check_spambot_warning(struct Client
*source_p
, const char *name
)
1004 int decrement_count
;
1005 if((GlobalSetOptions
.spam_num
&&
1006 (source_p
->localClient
->join_leave_count
>= GlobalSetOptions
.spam_num
)))
1008 if(source_p
->localClient
->oper_warn_count_down
> 0)
1009 source_p
->localClient
->oper_warn_count_down
--;
1011 source_p
->localClient
->oper_warn_count_down
= 0;
1012 if(source_p
->localClient
->oper_warn_count_down
== 0 &&
1015 /* Its already known as a possible spambot */
1016 sendto_realops_snomask(SNO_BOTS
, L_NETWIDE
,
1017 "User %s (%s@%s) trying to join %s is a possible spambot",
1019 source_p
->username
, source_p
->orighost
, name
);
1020 source_p
->localClient
->oper_warn_count_down
= OPER_SPAM_COUNTDOWN
;
1026 (rb_current_time() - source_p
->localClient
->last_leave_time
)) >
1027 JOIN_LEAVE_COUNT_EXPIRE_TIME
)
1029 decrement_count
= (t_delta
/ JOIN_LEAVE_COUNT_EXPIRE_TIME
);
1032 else if(decrement_count
> source_p
->localClient
->join_leave_count
)
1033 source_p
->localClient
->join_leave_count
= 0;
1035 source_p
->localClient
->join_leave_count
-= decrement_count
;
1039 if((rb_current_time() -
1040 (source_p
->localClient
->last_join_time
)) < GlobalSetOptions
.spam_time
)
1042 /* oh, its a possible spambot */
1043 source_p
->localClient
->join_leave_count
++;
1047 source_p
->localClient
->last_join_time
= rb_current_time();
1049 source_p
->localClient
->last_leave_time
= rb_current_time();
1053 /* check_splitmode()
1057 * side effects - compares usercount and servercount against their split
1058 * values and adjusts splitmode accordingly
1061 check_splitmode(void *unused
)
1063 if(splitchecking
&& (ConfigChannel
.no_join_on_split
|| ConfigChannel
.no_create_on_split
))
1065 /* not split, we're being asked to check now because someone
1070 if(eob_count
< split_servers
|| Count
.total
< split_users
)
1073 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1074 "Network split, activating splitmode");
1075 check_splitmode_ev
= rb_event_addish("check_splitmode", check_splitmode
, NULL
, 2);
1078 /* in splitmode, check whether its finished */
1079 else if(eob_count
>= split_servers
&& Count
.total
>= split_users
)
1083 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1084 "Network rejoined, deactivating splitmode");
1086 rb_event_delete(check_splitmode_ev
);
1087 check_splitmode_ev
= NULL
;
1095 * input - channel to allocate topic for
1096 * output - 1 on success, else 0
1097 * side effects - channel gets a topic allocated
1100 allocate_topic(struct Channel
*chptr
)
1107 ptr
= rb_bh_alloc(topic_heap
);
1109 /* Basically we allocate one large block for the topic and
1110 * the topic info. We then split it up into two and shove it
1114 chptr
->topic_info
= (char *) ptr
+ TOPICLEN
+ 1;
1115 *chptr
->topic
= '\0';
1116 *chptr
->topic_info
= '\0';
1121 * input - channel which has topic to free
1123 * side effects - channels topic is free'd
1126 free_topic(struct Channel
*chptr
)
1130 if(chptr
== NULL
|| chptr
->topic
== NULL
)
1133 /* This is safe for now - If you change allocate_topic you
1134 * MUST change this as well
1137 rb_bh_free(topic_heap
, ptr
);
1138 chptr
->topic
= NULL
;
1139 chptr
->topic_info
= NULL
;
1142 /* set_channel_topic()
1144 * input - channel, topic to set, topic info and topic ts
1146 * side effects - channels topic, topic info and TS are set.
1149 set_channel_topic(struct Channel
*chptr
, const char *topic
, const char *topic_info
, time_t topicts
)
1151 if(strlen(topic
) > 0)
1153 if(chptr
->topic
== NULL
)
1154 allocate_topic(chptr
);
1155 rb_strlcpy(chptr
->topic
, topic
, TOPICLEN
+ 1);
1156 rb_strlcpy(chptr
->topic_info
, topic_info
, USERHOST_REPLYLEN
);
1157 chptr
->topic_time
= topicts
;
1161 if(chptr
->topic
!= NULL
)
1163 chptr
->topic_time
= 0;
1169 * inputs - pointer to channel
1170 * - pointer to client
1171 * output - string with simple modes
1172 * side effects - result from previous calls overwritten
1174 * Stolen from ShadowIRCd 4 --nenolod
1177 channel_modes(struct Channel
*chptr
, struct Client
*client_p
)
1182 static char final
[BUFSIZE
];
1189 for (i
= 0; i
< 256; i
++)
1191 if(chmode_table
[i
].set_func
== chm_hidden
&& (!IsOper(client_p
) || !IsClient(client_p
)))
1193 if(chptr
->mode
.mode
& chmode_flags
[i
])
1197 if(chptr
->mode
.limit
)
1201 if(!IsClient(client_p
) || IsMember(client_p
, chptr
))
1202 pbuf
+= sprintf(pbuf
, " %d", chptr
->mode
.limit
);
1205 if(*chptr
->mode
.key
)
1209 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1210 pbuf
+= sprintf(pbuf
, " %s", chptr
->mode
.key
);
1213 if(chptr
->mode
.join_num
)
1217 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1218 pbuf
+= sprintf(pbuf
, " %d:%d", chptr
->mode
.join_num
,
1219 chptr
->mode
.join_time
);
1222 if(*chptr
->mode
.forward
&&
1223 (ConfigChannel
.use_forward
|| !IsClient(client_p
)))
1227 if(pbuf
> buf2
|| !IsClient(client_p
) || IsMember(client_p
, chptr
))
1228 pbuf
+= sprintf(pbuf
, " %s", chptr
->mode
.forward
);
1233 rb_strlcpy(final
, buf1
, sizeof final
);
1234 rb_strlcat(final
, buf2
, sizeof final
);
1238 /* void send_cap_mode_changes(struct Client *client_p,
1239 * struct Client *source_p,
1240 * struct Channel *chptr, int cap, int nocap)
1241 * Input: The client sending(client_p), the source client(source_p),
1242 * the channel to send mode changes for(chptr)
1244 * Side-effects: Sends the appropriate mode changes to capable servers.
1246 * Reverted back to my original design, except that we now keep a count
1247 * of the number of servers which each combination as an optimisation, so
1248 * the capabs combinations which are not needed are not worked out. -A1kmm
1250 * Removed most code here because we don't need to be compatible with ircd
1251 * 2.8.21+CSr and stuff. --nenolod
1254 send_cap_mode_changes(struct Client
*client_p
, struct Client
*source_p
,
1255 struct Channel
*chptr
, struct ChModeChange mode_changes
[], int mode_count
)
1257 static char modebuf
[BUFSIZE
];
1258 static char parabuf
[BUFSIZE
];
1259 int i
, mbl
, pbl
, nc
, mc
, preflen
, len
;
1265 /* Now send to servers... */
1273 mbl
= preflen
= sprintf(modebuf
, ":%s TMODE %ld %s ",
1274 use_id(source_p
), (long) chptr
->channelts
,
1277 /* loop the list of - modes we have */
1278 for (i
= 0; i
< mode_count
; i
++)
1280 /* if they dont support the cap we need, or they do support a cap they
1281 * cant have, then dont add it to the modebuf.. that way they wont see
1284 if (mode_changes
[i
].letter
== 0)
1287 if (!EmptyString(mode_changes
[i
].id
))
1288 arg
= mode_changes
[i
].id
;
1290 arg
= mode_changes
[i
].arg
;
1294 arglen
= strlen(arg
);
1296 /* dont even think about it! --fl */
1297 if(arglen
> MODEBUFLEN
- 5)
1301 /* if we're creeping past the buf size, we need to send it and make
1302 * another line for the other modes
1303 * XXX - this could give away server topology with uids being
1304 * different lengths, but not much we can do, except possibly break
1305 * them as if they were the longest of the nick or uid at all times,
1306 * which even then won't work as we don't always know the uid -A1kmm.
1308 if(arg
&& ((mc
== MAXMODEPARAMSSERV
) ||
1309 ((mbl
+ pbl
+ arglen
+ 4) > (BUFSIZE
- 3))))
1312 sendto_server(client_p
, chptr
, NOCAPS
, NOCAPS
,
1313 "%s %s", modebuf
, parabuf
);
1324 if(dir
!= mode_changes
[i
].dir
)
1326 modebuf
[mbl
++] = (mode_changes
[i
].dir
== MODE_ADD
) ? '+' : '-';
1327 dir
= mode_changes
[i
].dir
;
1330 modebuf
[mbl
++] = mode_changes
[i
].letter
;
1336 len
= sprintf(pbuf
, "%s ", arg
);
1343 if(pbl
&& parabuf
[pbl
- 1] == ' ')
1344 parabuf
[pbl
- 1] = 0;
1347 sendto_server(client_p
, chptr
, NOCAPS
, NOCAPS
, "%s %s", modebuf
, parabuf
);
1351 resv_chan_forcepart(const char *name
, const char *reason
, int temp_time
)
1354 rb_dlink_node
*next_ptr
;
1355 struct Channel
*chptr
;
1356 struct membership
*msptr
;
1357 struct Client
*target_p
;
1359 if(!ConfigChannel
.resv_forcepart
)
1362 /* for each user on our server in the channel list
1363 * send them a PART, and notify opers.
1365 chptr
= find_channel(name
);
1368 RB_DLINK_FOREACH_SAFE(ptr
, next_ptr
, chptr
->locmembers
.head
)
1371 target_p
= msptr
->client_p
;
1373 if(IsExemptResv(target_p
))
1376 sendto_server(target_p
, chptr
, CAP_TS6
, NOCAPS
,
1377 ":%s PART %s", target_p
->id
, chptr
->chname
);
1379 sendto_channel_local(ALL_MEMBERS
, chptr
, ":%s!%s@%s PART %s :%s",
1380 target_p
->name
, target_p
->username
,
1381 target_p
->host
, chptr
->chname
, target_p
->name
);
1383 remove_user_from_channel(msptr
);
1385 /* notify opers & user they were removed from the channel */
1386 sendto_realops_snomask(SNO_GENERAL
, L_ALL
,
1387 "Forced PART for %s!%s@%s from %s (%s)",
1388 target_p
->name
, target_p
->username
,
1389 target_p
->host
, name
, reason
);
1392 sendto_one_notice(target_p
, ":*** Channel %s is temporarily unavailable on this server.",
1395 sendto_one_notice(target_p
, ":*** Channel %s is no longer available on this server.",