mirror of
https://github.com/matrix-construct/construct
synced 2024-08-25 11:02:08 +02:00
1401 lines
35 KiB
C
1401 lines
35 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* channel.c: Controls channels.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "stdinc.h"
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#include "channel.h"
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#include "chmode.h"
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#include "client.h"
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#include "common.h"
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#include "hash.h"
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#include "hook.h"
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#include "match.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "s_serv.h" /* captab */
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#include "s_user.h"
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#include "send.h"
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#include "whowas.h"
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#include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
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#include "s_newconf.h"
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#include "logger.h"
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#include "ipv4_from_ipv6.h"
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#include "s_assert.h"
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struct config_channel_entry ConfigChannel;
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rb_dlink_list global_channel_list;
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static rb_bh *channel_heap;
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static rb_bh *ban_heap;
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static rb_bh *topic_heap;
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static rb_bh *member_heap;
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static void free_topic(struct Channel *chptr);
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static int h_can_join;
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static int h_can_send;
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int h_get_channel_access;
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/* init_channels()
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*
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* input -
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* output -
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* side effects - initialises the various blockheaps
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*/
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void
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init_channels(void)
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{
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channel_heap = rb_bh_create(sizeof(struct Channel), CHANNEL_HEAP_SIZE, "channel_heap");
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ban_heap = rb_bh_create(sizeof(struct Ban), BAN_HEAP_SIZE, "ban_heap");
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topic_heap = rb_bh_create(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE, "topic_heap");
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member_heap = rb_bh_create(sizeof(struct membership), MEMBER_HEAP_SIZE, "member_heap");
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h_can_join = register_hook("can_join");
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h_can_send = register_hook("can_send");
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h_get_channel_access = register_hook("get_channel_access");
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}
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/*
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* allocate_channel - Allocates a channel
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*/
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struct Channel *
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allocate_channel(const char *chname)
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{
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struct Channel *chptr;
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chptr = rb_bh_alloc(channel_heap);
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chptr->chname = rb_strdup(chname);
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return (chptr);
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}
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void
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free_channel(struct Channel *chptr)
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{
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rb_free(chptr->chname);
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rb_free(chptr->mode_lock);
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rb_bh_free(channel_heap, chptr);
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}
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struct Ban *
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allocate_ban(const char *banstr, const char *who, const char *forward)
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{
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struct Ban *bptr;
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bptr = rb_bh_alloc(ban_heap);
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bptr->banstr = rb_strdup(banstr);
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bptr->who = rb_strdup(who);
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bptr->forward = forward ? rb_strdup(forward) : NULL;
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return (bptr);
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}
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void
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free_ban(struct Ban *bptr)
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{
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rb_free(bptr->banstr);
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rb_free(bptr->who);
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rb_free(bptr->forward);
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rb_bh_free(ban_heap, bptr);
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}
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/*
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* send_channel_join()
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*
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* input - channel to join, client joining.
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* output - none
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* side effects - none
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*/
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void
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send_channel_join(struct Channel *chptr, struct Client *client_p)
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{
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if (!IsClient(client_p))
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return;
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sendto_channel_local_with_capability(ALL_MEMBERS, NOCAPS, CLICAP_EXTENDED_JOIN, chptr, ":%s!%s@%s JOIN %s",
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client_p->name, client_p->username, client_p->host, chptr->chname);
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sendto_channel_local_with_capability(ALL_MEMBERS, CLICAP_EXTENDED_JOIN, NOCAPS, chptr, ":%s!%s@%s JOIN %s %s :%s",
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client_p->name, client_p->username, client_p->host, chptr->chname,
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EmptyString(client_p->user->suser) ? "*" : client_p->user->suser,
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client_p->info);
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/* Send away message to away-notify enabled clients. */
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if (client_p->user->away)
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sendto_channel_local_with_capability_butone(client_p, ALL_MEMBERS, CLICAP_AWAY_NOTIFY, NOCAPS, chptr,
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":%s!%s@%s AWAY :%s", client_p->name, client_p->username,
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client_p->host, client_p->user->away);
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}
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/* find_channel_membership()
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*
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* input - channel to find them in, client to find
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* output - membership of client in channel, else NULL
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* side effects -
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*/
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struct membership *
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find_channel_membership(struct Channel *chptr, struct Client *client_p)
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{
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struct membership *msptr;
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rb_dlink_node *ptr;
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if(!IsClient(client_p))
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return NULL;
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/* Pick the most efficient list to use to be nice to things like
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* CHANSERV which could be in a large number of channels
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*/
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if(rb_dlink_list_length(&chptr->members) < rb_dlink_list_length(&client_p->user->channel))
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{
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RB_DLINK_FOREACH(ptr, chptr->members.head)
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{
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msptr = ptr->data;
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if(msptr->client_p == client_p)
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return msptr;
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}
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}
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else
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{
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RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
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{
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msptr = ptr->data;
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if(msptr->chptr == chptr)
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return msptr;
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}
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}
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return NULL;
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}
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/* find_channel_status()
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*
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* input - membership to get status for, whether we can combine flags
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* output - flags of user on channel
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* side effects -
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*/
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const char *
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find_channel_status(struct membership *msptr, int combine)
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{
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static char buffer[3];
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char *p;
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p = buffer;
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if(is_chanop(msptr))
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{
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if(!combine)
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return "@";
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*p++ = '@';
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}
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if(is_voiced(msptr))
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*p++ = '+';
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*p = '\0';
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return buffer;
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}
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/* add_user_to_channel()
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*
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* input - channel to add client to, client to add, channel flags
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* output -
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* side effects - user is added to channel
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*/
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void
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add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags)
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{
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struct membership *msptr;
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s_assert(client_p->user != NULL);
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if(client_p->user == NULL)
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return;
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msptr = rb_bh_alloc(member_heap);
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msptr->chptr = chptr;
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msptr->client_p = client_p;
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msptr->flags = flags;
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rb_dlinkAdd(msptr, &msptr->usernode, &client_p->user->channel);
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rb_dlinkAdd(msptr, &msptr->channode, &chptr->members);
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if(MyClient(client_p))
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rb_dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers);
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}
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/* remove_user_from_channel()
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*
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* input - membership pointer to remove from channel
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* output -
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* side effects - membership (thus user) is removed from channel
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*/
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void
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remove_user_from_channel(struct membership *msptr)
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{
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struct Client *client_p;
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struct Channel *chptr;
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s_assert(msptr != NULL);
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if(msptr == NULL)
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return;
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client_p = msptr->client_p;
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chptr = msptr->chptr;
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rb_dlinkDelete(&msptr->usernode, &client_p->user->channel);
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rb_dlinkDelete(&msptr->channode, &chptr->members);
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if(client_p->servptr == &me)
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rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers);
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if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0)
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destroy_channel(chptr);
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rb_bh_free(member_heap, msptr);
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return;
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}
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/* remove_user_from_channels()
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*
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* input - user to remove from all channels
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* output -
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* side effects - user is removed from all channels
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*/
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void
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remove_user_from_channels(struct Client *client_p)
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{
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struct Channel *chptr;
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struct membership *msptr;
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rb_dlink_node *ptr;
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rb_dlink_node *next_ptr;
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if(client_p == NULL)
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return;
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RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head)
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{
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msptr = ptr->data;
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chptr = msptr->chptr;
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rb_dlinkDelete(&msptr->channode, &chptr->members);
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if(client_p->servptr == &me)
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rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers);
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if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0)
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destroy_channel(chptr);
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rb_bh_free(member_heap, msptr);
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}
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client_p->user->channel.head = client_p->user->channel.tail = NULL;
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client_p->user->channel.length = 0;
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}
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/* invalidate_bancache_user()
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*
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* input - user to invalidate ban cache for
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* output -
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* side effects - ban cache is invalidated for all memberships of that user
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* to be used after a nick change
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*/
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void
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invalidate_bancache_user(struct Client *client_p)
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{
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struct membership *msptr;
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rb_dlink_node *ptr;
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if(client_p == NULL)
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return;
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RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
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{
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msptr = ptr->data;
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msptr->bants = 0;
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msptr->flags &= ~CHFL_BANNED;
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}
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}
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/* check_channel_name()
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*
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* input - channel name
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* output - 1 if valid channel name, else 0
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* side effects -
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*/
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int
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check_channel_name(const char *name)
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{
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s_assert(name != NULL);
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if(name == NULL)
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return 0;
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for (; *name; ++name)
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{
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if(!IsChanChar(*name))
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return 0;
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}
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return 1;
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}
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/* free_channel_list()
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*
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* input - rb_dlink list to free
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* output -
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* side effects - list of b/e/I modes is cleared
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*/
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void
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free_channel_list(rb_dlink_list * list)
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{
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rb_dlink_node *ptr;
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rb_dlink_node *next_ptr;
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struct Ban *actualBan;
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RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
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{
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actualBan = ptr->data;
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free_ban(actualBan);
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}
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list->head = list->tail = NULL;
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list->length = 0;
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}
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/* destroy_channel()
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*
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* input - channel to destroy
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* output -
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* side effects - channel is obliterated
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*/
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void
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destroy_channel(struct Channel *chptr)
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{
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rb_dlink_node *ptr, *next_ptr;
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RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
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{
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del_invite(chptr, ptr->data);
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}
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/* free all bans/exceptions/denies */
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free_channel_list(&chptr->banlist);
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free_channel_list(&chptr->exceptlist);
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free_channel_list(&chptr->invexlist);
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free_channel_list(&chptr->quietlist);
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/* Free the topic */
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free_topic(chptr);
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rb_dlinkDelete(&chptr->node, &global_channel_list);
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del_from_channel_hash(chptr->chname, chptr);
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free_channel(chptr);
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}
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/* channel_pub_or_secret()
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*
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* input - channel
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* output - "=" if public, "@" if secret, else "*"
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* side effects -
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*/
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static const char *
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channel_pub_or_secret(struct Channel *chptr)
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{
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if(PubChannel(chptr))
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return ("=");
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else if(SecretChannel(chptr))
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return ("@");
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return ("*");
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}
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/* channel_member_names()
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*
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* input - channel to list, client to list to, show endofnames
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* output -
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* side effects - client is given list of users on channel
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*/
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void
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channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon)
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{
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struct membership *msptr;
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struct Client *target_p;
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rb_dlink_node *ptr;
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char lbuf[BUFSIZE];
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char *t;
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int mlen;
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int tlen;
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int cur_len;
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int is_member;
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int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX);
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if(ShowChannel(client_p, chptr))
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{
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is_member = IsMember(client_p, chptr);
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cur_len = mlen = sprintf(lbuf, form_str(RPL_NAMREPLY),
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me.name, client_p->name,
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channel_pub_or_secret(chptr), chptr->chname);
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t = lbuf + cur_len;
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RB_DLINK_FOREACH(ptr, chptr->members.head)
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{
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msptr = ptr->data;
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target_p = msptr->client_p;
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if(IsInvisible(target_p) && !is_member)
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continue;
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if (IsCapable(client_p, CLICAP_USERHOST_IN_NAMES))
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{
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/* space, possible "@+" prefix */
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if (cur_len + strlen(target_p->name) + strlen(target_p->username) + strlen(target_p->host) + 5 >= BUFSIZE - 5)
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{
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*(t - 1) = '\0';
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sendto_one(client_p, "%s", lbuf);
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cur_len = mlen;
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t = lbuf + mlen;
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}
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tlen = sprintf(t, "%s%s!%s@%s ", find_channel_status(msptr, stack),
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target_p->name, target_p->username, target_p->host);
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}
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else
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{
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/* space, possible "@+" prefix */
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if(cur_len + strlen(target_p->name) + 3 >= BUFSIZE - 3)
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{
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*(t - 1) = '\0';
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sendto_one(client_p, "%s", lbuf);
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cur_len = mlen;
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t = lbuf + mlen;
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}
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tlen = sprintf(t, "%s%s ", find_channel_status(msptr, stack),
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target_p->name);
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}
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cur_len += tlen;
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t += tlen;
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}
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/* The old behaviour here was to always output our buffer,
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* even if there are no clients we can show. This happens
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* when a client does "NAMES" with no parameters, and all
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* the clients on a -sp channel are +i. I dont see a good
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* reason for keeping that behaviour, as it just wastes
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* bandwidth. --anfl
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*/
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if(cur_len != mlen)
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{
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*(t - 1) = '\0';
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sendto_one(client_p, "%s", lbuf);
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}
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}
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if(show_eon)
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sendto_one(client_p, form_str(RPL_ENDOFNAMES),
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me.name, client_p->name, chptr->chname);
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}
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/* del_invite()
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*
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* input - channel to remove invite from, client to remove
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* output -
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* side effects - user is removed from invite list, if exists
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*/
|
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void
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del_invite(struct Channel *chptr, struct Client *who)
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{
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rb_dlinkFindDestroy(who, &chptr->invites);
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rb_dlinkFindDestroy(chptr, &who->user->invited);
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}
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|
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/* is_banned_list()
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*
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* input - channel to check bans for, ban list (banlist or quietlist),
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* user to check bans against, optional prebuilt buffers,
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* optional forward channel pointer
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* output - 1 if banned, else 0
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* side effects -
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*/
|
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static int
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is_banned_list(struct Channel *chptr, rb_dlink_list *list,
|
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struct Client *who, struct membership *msptr,
|
|
const char *s, const char *s2, const char **forward)
|
|
{
|
|
char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_althost[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_ip4host[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char *s3 = NULL;
|
|
char *s4 = NULL;
|
|
struct sockaddr_in ip4;
|
|
rb_dlink_node *ptr;
|
|
struct Ban *actualBan = NULL;
|
|
struct Ban *actualExcept = NULL;
|
|
|
|
if(!MyClient(who))
|
|
return 0;
|
|
|
|
/* if the buffers havent been built, do it here */
|
|
if(s == NULL)
|
|
{
|
|
sprintf(src_host, "%s!%s@%s", who->name, who->username, who->host);
|
|
sprintf(src_iphost, "%s!%s@%s", who->name, who->username, who->sockhost);
|
|
|
|
s = src_host;
|
|
s2 = src_iphost;
|
|
}
|
|
if(who->localClient->mangledhost != NULL)
|
|
{
|
|
/* if host mangling mode enabled, also check their real host */
|
|
if(!strcmp(who->host, who->localClient->mangledhost))
|
|
{
|
|
sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->orighost);
|
|
s3 = src_althost;
|
|
}
|
|
/* if host mangling mode not enabled and no other spoof,
|
|
* also check the mangled form of their host */
|
|
else if (!IsDynSpoof(who))
|
|
{
|
|
sprintf(src_althost, "%s!%s@%s", who->name, who->username, who->localClient->mangledhost);
|
|
s3 = src_althost;
|
|
}
|
|
}
|
|
#ifdef RB_IPV6
|
|
if(who->localClient->ip.ss_family == AF_INET6 &&
|
|
ipv4_from_ipv6((const struct sockaddr_in6 *)&who->localClient->ip, &ip4))
|
|
{
|
|
sprintf(src_ip4host, "%s!%s@", who->name, who->username);
|
|
s4 = src_ip4host + strlen(src_ip4host);
|
|
rb_inet_ntop_sock((struct sockaddr *)&ip4,
|
|
s4, src_ip4host + sizeof src_ip4host - s4);
|
|
s4 = src_ip4host;
|
|
}
|
|
#endif
|
|
|
|
RB_DLINK_FOREACH(ptr, list->head)
|
|
{
|
|
actualBan = ptr->data;
|
|
if(match(actualBan->banstr, s) ||
|
|
match(actualBan->banstr, s2) ||
|
|
match_cidr(actualBan->banstr, s2) ||
|
|
match_extban(actualBan->banstr, who, chptr, CHFL_BAN) ||
|
|
(s3 != NULL && match(actualBan->banstr, s3))
|
|
#ifdef RB_IPV6
|
|
||
|
|
(s4 != NULL && (match(actualBan->banstr, s4) || match_cidr(actualBan->banstr, s4)))
|
|
#endif
|
|
)
|
|
break;
|
|
else
|
|
actualBan = NULL;
|
|
}
|
|
|
|
if((actualBan != NULL) && ConfigChannel.use_except)
|
|
{
|
|
RB_DLINK_FOREACH(ptr, chptr->exceptlist.head)
|
|
{
|
|
actualExcept = ptr->data;
|
|
|
|
/* theyre exempted.. */
|
|
if(match(actualExcept->banstr, s) ||
|
|
match(actualExcept->banstr, s2) ||
|
|
match_cidr(actualExcept->banstr, s2) ||
|
|
match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION) ||
|
|
(s3 != NULL && match(actualExcept->banstr, s3)))
|
|
{
|
|
/* cache the fact theyre not banned */
|
|
if(msptr != NULL)
|
|
{
|
|
msptr->bants = chptr->bants;
|
|
msptr->flags &= ~CHFL_BANNED;
|
|
}
|
|
|
|
return CHFL_EXCEPTION;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* cache the banned/not banned status */
|
|
if(msptr != NULL)
|
|
{
|
|
msptr->bants = chptr->bants;
|
|
|
|
if(actualBan != NULL)
|
|
{
|
|
msptr->flags |= CHFL_BANNED;
|
|
return CHFL_BAN;
|
|
}
|
|
else
|
|
{
|
|
msptr->flags &= ~CHFL_BANNED;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (actualBan && actualBan->forward && forward)
|
|
*forward = actualBan->forward;
|
|
|
|
return ((actualBan ? CHFL_BAN : 0));
|
|
}
|
|
|
|
/* is_banned()
|
|
*
|
|
* input - channel to check bans for, user to check bans against
|
|
* optional prebuilt buffers, optional forward channel pointer
|
|
* output - 1 if banned, else 0
|
|
* side effects -
|
|
*/
|
|
int
|
|
is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr,
|
|
const char *s, const char *s2, const char **forward)
|
|
{
|
|
if (chptr->last_checked_client != NULL &&
|
|
who == chptr->last_checked_client &&
|
|
chptr->last_checked_type == CHFL_BAN &&
|
|
chptr->last_checked_ts > chptr->bants)
|
|
return chptr->last_checked_result;
|
|
|
|
chptr->last_checked_client = who;
|
|
chptr->last_checked_type = CHFL_BAN;
|
|
chptr->last_checked_result = is_banned_list(chptr, &chptr->banlist, who, msptr, s, s2, forward);
|
|
chptr->last_checked_ts = rb_current_time();
|
|
|
|
return chptr->last_checked_result;
|
|
}
|
|
|
|
/* is_quieted()
|
|
*
|
|
* input - channel to check bans for, user to check bans against
|
|
* optional prebuilt buffers
|
|
* output - 1 if banned, else 0
|
|
* side effects -
|
|
*/
|
|
int
|
|
is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr,
|
|
const char *s, const char *s2)
|
|
{
|
|
if (chptr->last_checked_client != NULL &&
|
|
who == chptr->last_checked_client &&
|
|
chptr->last_checked_type == CHFL_QUIET &&
|
|
chptr->last_checked_ts > chptr->bants)
|
|
return chptr->last_checked_result;
|
|
|
|
chptr->last_checked_client = who;
|
|
chptr->last_checked_type = CHFL_QUIET;
|
|
chptr->last_checked_result = is_banned_list(chptr, &chptr->quietlist, who, msptr, s, s2, NULL);
|
|
chptr->last_checked_ts = rb_current_time();
|
|
|
|
return chptr->last_checked_result;
|
|
}
|
|
|
|
/* can_join()
|
|
*
|
|
* input - client to check, channel to check for, key
|
|
* output - reason for not being able to join, else 0, channel name to forward to
|
|
* side effects -
|
|
* caveats - this function should only be called on a local user.
|
|
*/
|
|
int
|
|
can_join(struct Client *source_p, struct Channel *chptr, const char *key, const char **forward)
|
|
{
|
|
rb_dlink_node *invite = NULL;
|
|
rb_dlink_node *ptr;
|
|
struct Ban *invex = NULL;
|
|
char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_althost[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
int use_althost = 0;
|
|
int i = 0;
|
|
hook_data_channel moduledata;
|
|
|
|
s_assert(source_p->localClient != NULL);
|
|
|
|
moduledata.client = source_p;
|
|
moduledata.chptr = chptr;
|
|
moduledata.approved = 0;
|
|
|
|
sprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host);
|
|
sprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost);
|
|
if(source_p->localClient->mangledhost != NULL)
|
|
{
|
|
/* if host mangling mode enabled, also check their real host */
|
|
if(!strcmp(source_p->host, source_p->localClient->mangledhost))
|
|
{
|
|
sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->orighost);
|
|
use_althost = 1;
|
|
}
|
|
/* if host mangling mode not enabled and no other spoof,
|
|
* also check the mangled form of their host */
|
|
else if (!IsDynSpoof(source_p))
|
|
{
|
|
sprintf(src_althost, "%s!%s@%s", source_p->name, source_p->username, source_p->localClient->mangledhost);
|
|
use_althost = 1;
|
|
}
|
|
}
|
|
|
|
if((is_banned(chptr, source_p, NULL, src_host, src_iphost, forward)) == CHFL_BAN)
|
|
{
|
|
moduledata.approved = ERR_BANNEDFROMCHAN;
|
|
goto finish_join_check;
|
|
}
|
|
|
|
if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key)))
|
|
{
|
|
moduledata.approved = ERR_BADCHANNELKEY;
|
|
goto finish_join_check;
|
|
}
|
|
|
|
/* All checks from this point on will forward... */
|
|
if(forward)
|
|
*forward = chptr->mode.forward;
|
|
|
|
if(chptr->mode.mode & MODE_INVITEONLY)
|
|
{
|
|
RB_DLINK_FOREACH(invite, source_p->user->invited.head)
|
|
{
|
|
if(invite->data == chptr)
|
|
break;
|
|
}
|
|
if(invite == NULL)
|
|
{
|
|
if(!ConfigChannel.use_invex)
|
|
moduledata.approved = ERR_INVITEONLYCHAN;
|
|
RB_DLINK_FOREACH(ptr, chptr->invexlist.head)
|
|
{
|
|
invex = ptr->data;
|
|
if(match(invex->banstr, src_host)
|
|
|| match(invex->banstr, src_iphost)
|
|
|| match_cidr(invex->banstr, src_iphost)
|
|
|| match_extban(invex->banstr, source_p, chptr, CHFL_INVEX)
|
|
|| (use_althost && match(invex->banstr, src_althost)))
|
|
break;
|
|
}
|
|
if(ptr == NULL)
|
|
moduledata.approved = ERR_INVITEONLYCHAN;
|
|
}
|
|
}
|
|
|
|
if(chptr->mode.limit &&
|
|
rb_dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit)
|
|
i = ERR_CHANNELISFULL;
|
|
if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser))
|
|
i = ERR_NEEDREGGEDNICK;
|
|
/* join throttling stuff --nenolod */
|
|
else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0)
|
|
{
|
|
if ((rb_current_time() - chptr->join_delta <=
|
|
chptr->mode.join_time) && (chptr->join_count >=
|
|
chptr->mode.join_num))
|
|
i = ERR_THROTTLE;
|
|
}
|
|
|
|
/* allow /invite to override +l/+r/+j also -- jilles */
|
|
if (i != 0 && invite == NULL)
|
|
{
|
|
RB_DLINK_FOREACH(invite, source_p->user->invited.head)
|
|
{
|
|
if(invite->data == chptr)
|
|
break;
|
|
}
|
|
if (invite == NULL)
|
|
moduledata.approved = i;
|
|
}
|
|
|
|
finish_join_check:
|
|
call_hook(h_can_join, &moduledata);
|
|
|
|
return moduledata.approved;
|
|
}
|
|
|
|
/* can_send()
|
|
*
|
|
* input - user to check in channel, membership pointer
|
|
* output - whether can explicitly send or not, else CAN_SEND_NONOP
|
|
* side effects -
|
|
*/
|
|
int
|
|
can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr)
|
|
{
|
|
hook_data_channel_approval moduledata;
|
|
|
|
moduledata.approved = CAN_SEND_NONOP;
|
|
moduledata.dir = MODE_QUERY;
|
|
|
|
if(IsServer(source_p) || IsService(source_p))
|
|
return CAN_SEND_OPV;
|
|
|
|
if(MyClient(source_p) && hash_find_resv(chptr->chname) &&
|
|
!IsOper(source_p) && !IsExemptResv(source_p))
|
|
moduledata.approved = CAN_SEND_NO;
|
|
|
|
if(msptr == NULL)
|
|
{
|
|
msptr = find_channel_membership(chptr, source_p);
|
|
|
|
if(msptr == NULL)
|
|
{
|
|
/* if its +m or +n and theyre not in the channel,
|
|
* they cant send. we dont check bans here because
|
|
* theres no possibility of caching them --fl
|
|
*/
|
|
if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED)
|
|
moduledata.approved = CAN_SEND_NO;
|
|
else
|
|
moduledata.approved = CAN_SEND_NONOP;
|
|
|
|
return moduledata.approved;
|
|
}
|
|
}
|
|
|
|
if(chptr->mode.mode & MODE_MODERATED)
|
|
moduledata.approved = CAN_SEND_NO;
|
|
|
|
if(MyClient(source_p))
|
|
{
|
|
/* cached can_send */
|
|
if(msptr->bants == chptr->bants)
|
|
{
|
|
if(can_send_banned(msptr))
|
|
moduledata.approved = CAN_SEND_NO;
|
|
}
|
|
else if(is_banned(chptr, source_p, msptr, NULL, NULL, NULL) == CHFL_BAN
|
|
|| is_quieted(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN)
|
|
moduledata.approved = CAN_SEND_NO;
|
|
}
|
|
|
|
if(is_chanop_voiced(msptr))
|
|
moduledata.approved = CAN_SEND_OPV;
|
|
|
|
moduledata.client = source_p;
|
|
moduledata.chptr = msptr->chptr;
|
|
moduledata.msptr = msptr;
|
|
moduledata.target = NULL;
|
|
moduledata.dir = (moduledata.approved == CAN_SEND_NO) ? MODE_ADD : MODE_QUERY;
|
|
|
|
call_hook(h_can_send, &moduledata);
|
|
|
|
return moduledata.approved;
|
|
}
|
|
|
|
/*
|
|
* flood_attack_channel
|
|
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
|
|
* says NOTICE must not auto reply
|
|
* - pointer to source Client
|
|
* - pointer to target channel
|
|
* output - 1 if target is under flood attack
|
|
* side effects - check for flood attack on target chptr
|
|
*/
|
|
int
|
|
flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname)
|
|
{
|
|
int delta;
|
|
|
|
if(GlobalSetOptions.floodcount && MyClient(source_p))
|
|
{
|
|
if((chptr->first_received_message_time + 1) < rb_current_time())
|
|
{
|
|
delta = rb_current_time() - chptr->first_received_message_time;
|
|
chptr->received_number_of_privmsgs -= delta;
|
|
chptr->first_received_message_time = rb_current_time();
|
|
if(chptr->received_number_of_privmsgs <= 0)
|
|
{
|
|
chptr->received_number_of_privmsgs = 0;
|
|
chptr->flood_noticed = 0;
|
|
}
|
|
}
|
|
|
|
if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount)
|
|
|| chptr->flood_noticed)
|
|
{
|
|
if(chptr->flood_noticed == 0)
|
|
{
|
|
sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE,
|
|
"Possible Flooder %s[%s@%s] on %s target: %s",
|
|
source_p->name, source_p->username,
|
|
source_p->orighost,
|
|
source_p->servptr->name, chptr->chname);
|
|
chptr->flood_noticed = 1;
|
|
|
|
/* Add a bit of penalty */
|
|
chptr->received_number_of_privmsgs += 2;
|
|
}
|
|
if(MyClient(source_p) && (p_or_n != 1))
|
|
sendto_one(source_p,
|
|
":%s NOTICE %s :*** Message to %s throttled due to flooding",
|
|
me.name, source_p->name, chptr->chname);
|
|
return 1;
|
|
}
|
|
else
|
|
chptr->received_number_of_privmsgs++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* find_bannickchange_channel()
|
|
* Input: client to check
|
|
* Output: channel preventing nick change
|
|
*/
|
|
struct Channel *
|
|
find_bannickchange_channel(struct Client *client_p)
|
|
{
|
|
struct Channel *chptr;
|
|
struct membership *msptr;
|
|
rb_dlink_node *ptr;
|
|
char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
|
|
|
|
if (!MyClient(client_p))
|
|
return NULL;
|
|
|
|
sprintf(src_host, "%s!%s@%s", client_p->name, client_p->username, client_p->host);
|
|
sprintf(src_iphost, "%s!%s@%s", client_p->name, client_p->username, client_p->sockhost);
|
|
|
|
RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
|
|
{
|
|
msptr = ptr->data;
|
|
chptr = msptr->chptr;
|
|
if (is_chanop_voiced(msptr))
|
|
continue;
|
|
/* cached can_send */
|
|
if (msptr->bants == chptr->bants)
|
|
{
|
|
if (can_send_banned(msptr))
|
|
return chptr;
|
|
}
|
|
else if (is_banned(chptr, client_p, msptr, src_host, src_iphost, NULL) == CHFL_BAN
|
|
|| is_quieted(chptr, client_p, msptr, src_host, src_iphost) == CHFL_BAN)
|
|
return chptr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* void check_spambot_warning(struct Client *source_p)
|
|
* Input: Client to check, channel name or NULL if this is a part.
|
|
* Output: none
|
|
* Side-effects: Updates the client's oper_warn_count_down, warns the
|
|
* IRC operators if necessary, and updates join_leave_countdown as
|
|
* needed.
|
|
*/
|
|
void
|
|
check_spambot_warning(struct Client *source_p, const char *name)
|
|
{
|
|
int t_delta;
|
|
int decrement_count;
|
|
if((GlobalSetOptions.spam_num &&
|
|
(source_p->localClient->join_leave_count >= GlobalSetOptions.spam_num)))
|
|
{
|
|
if(source_p->localClient->oper_warn_count_down > 0)
|
|
source_p->localClient->oper_warn_count_down--;
|
|
else
|
|
source_p->localClient->oper_warn_count_down = 0;
|
|
if(source_p->localClient->oper_warn_count_down == 0 &&
|
|
name != NULL)
|
|
{
|
|
/* Its already known as a possible spambot */
|
|
sendto_realops_snomask(SNO_BOTS, L_NETWIDE,
|
|
"User %s (%s@%s) trying to join %s is a possible spambot",
|
|
source_p->name,
|
|
source_p->username, source_p->orighost, name);
|
|
source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if((t_delta =
|
|
(rb_current_time() - source_p->localClient->last_leave_time)) >
|
|
JOIN_LEAVE_COUNT_EXPIRE_TIME)
|
|
{
|
|
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
|
|
if(name != NULL)
|
|
;
|
|
else if(decrement_count > source_p->localClient->join_leave_count)
|
|
source_p->localClient->join_leave_count = 0;
|
|
else
|
|
source_p->localClient->join_leave_count -= decrement_count;
|
|
}
|
|
else
|
|
{
|
|
if((rb_current_time() -
|
|
(source_p->localClient->last_join_time)) < GlobalSetOptions.spam_time)
|
|
{
|
|
/* oh, its a possible spambot */
|
|
source_p->localClient->join_leave_count++;
|
|
}
|
|
}
|
|
if(name != NULL)
|
|
source_p->localClient->last_join_time = rb_current_time();
|
|
else
|
|
source_p->localClient->last_leave_time = rb_current_time();
|
|
}
|
|
}
|
|
|
|
/* check_splitmode()
|
|
*
|
|
* input -
|
|
* output -
|
|
* side effects - compares usercount and servercount against their split
|
|
* values and adjusts splitmode accordingly
|
|
*/
|
|
void
|
|
check_splitmode(void *unused)
|
|
{
|
|
if(splitchecking && (ConfigChannel.no_join_on_split || ConfigChannel.no_create_on_split))
|
|
{
|
|
/* not split, we're being asked to check now because someone
|
|
* has left
|
|
*/
|
|
if(!splitmode)
|
|
{
|
|
if(eob_count < split_servers || Count.total < split_users)
|
|
{
|
|
splitmode = 1;
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL,
|
|
"Network split, activating splitmode");
|
|
check_splitmode_ev = rb_event_addish("check_splitmode", check_splitmode, NULL, 2);
|
|
}
|
|
}
|
|
/* in splitmode, check whether its finished */
|
|
else if(eob_count >= split_servers && Count.total >= split_users)
|
|
{
|
|
splitmode = 0;
|
|
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL,
|
|
"Network rejoined, deactivating splitmode");
|
|
|
|
rb_event_delete(check_splitmode_ev);
|
|
check_splitmode_ev = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* allocate_topic()
|
|
*
|
|
* input - channel to allocate topic for
|
|
* output - 1 on success, else 0
|
|
* side effects - channel gets a topic allocated
|
|
*/
|
|
static void
|
|
allocate_topic(struct Channel *chptr)
|
|
{
|
|
void *ptr;
|
|
|
|
if(chptr == NULL)
|
|
return;
|
|
|
|
ptr = rb_bh_alloc(topic_heap);
|
|
|
|
/* Basically we allocate one large block for the topic and
|
|
* the topic info. We then split it up into two and shove it
|
|
* in the chptr
|
|
*/
|
|
chptr->topic = ptr;
|
|
chptr->topic_info = (char *) ptr + TOPICLEN + 1;
|
|
*chptr->topic = '\0';
|
|
*chptr->topic_info = '\0';
|
|
}
|
|
|
|
/* free_topic()
|
|
*
|
|
* input - channel which has topic to free
|
|
* output -
|
|
* side effects - channels topic is free'd
|
|
*/
|
|
static void
|
|
free_topic(struct Channel *chptr)
|
|
{
|
|
void *ptr;
|
|
|
|
if(chptr == NULL || chptr->topic == NULL)
|
|
return;
|
|
|
|
/* This is safe for now - If you change allocate_topic you
|
|
* MUST change this as well
|
|
*/
|
|
ptr = chptr->topic;
|
|
rb_bh_free(topic_heap, ptr);
|
|
chptr->topic = NULL;
|
|
chptr->topic_info = NULL;
|
|
}
|
|
|
|
/* set_channel_topic()
|
|
*
|
|
* input - channel, topic to set, topic info and topic ts
|
|
* output -
|
|
* side effects - channels topic, topic info and TS are set.
|
|
*/
|
|
void
|
|
set_channel_topic(struct Channel *chptr, const char *topic, const char *topic_info, time_t topicts)
|
|
{
|
|
if(strlen(topic) > 0)
|
|
{
|
|
if(chptr->topic == NULL)
|
|
allocate_topic(chptr);
|
|
rb_strlcpy(chptr->topic, topic, TOPICLEN + 1);
|
|
rb_strlcpy(chptr->topic_info, topic_info, USERHOST_REPLYLEN);
|
|
chptr->topic_time = topicts;
|
|
}
|
|
else
|
|
{
|
|
if(chptr->topic != NULL)
|
|
free_topic(chptr);
|
|
chptr->topic_time = 0;
|
|
}
|
|
}
|
|
|
|
/* channel_modes()
|
|
*
|
|
* inputs - pointer to channel
|
|
* - pointer to client
|
|
* output - string with simple modes
|
|
* side effects - result from previous calls overwritten
|
|
*
|
|
* Stolen from ShadowIRCd 4 --nenolod
|
|
*/
|
|
const char *
|
|
channel_modes(struct Channel *chptr, struct Client *client_p)
|
|
{
|
|
int i;
|
|
char buf1[BUFSIZE];
|
|
char buf2[BUFSIZE];
|
|
static char final[BUFSIZE];
|
|
char *mbuf = buf1;
|
|
char *pbuf = buf2;
|
|
|
|
*mbuf++ = '+';
|
|
*pbuf = '\0';
|
|
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if(chmode_table[i].set_func == chm_hidden && (!IsOper(client_p) || !IsClient(client_p)))
|
|
continue;
|
|
if(chptr->mode.mode & chmode_flags[i])
|
|
*mbuf++ = i;
|
|
}
|
|
|
|
if(chptr->mode.limit)
|
|
{
|
|
*mbuf++ = 'l';
|
|
|
|
if(!IsClient(client_p) || IsMember(client_p, chptr))
|
|
pbuf += sprintf(pbuf, " %d", chptr->mode.limit);
|
|
}
|
|
|
|
if(*chptr->mode.key)
|
|
{
|
|
*mbuf++ = 'k';
|
|
|
|
if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr))
|
|
pbuf += sprintf(pbuf, " %s", chptr->mode.key);
|
|
}
|
|
|
|
if(chptr->mode.join_num)
|
|
{
|
|
*mbuf++ = 'j';
|
|
|
|
if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr))
|
|
pbuf += sprintf(pbuf, " %d:%d", chptr->mode.join_num,
|
|
chptr->mode.join_time);
|
|
}
|
|
|
|
if(*chptr->mode.forward &&
|
|
(ConfigChannel.use_forward || !IsClient(client_p)))
|
|
{
|
|
*mbuf++ = 'f';
|
|
|
|
if(pbuf > buf2 || !IsClient(client_p) || IsMember(client_p, chptr))
|
|
pbuf += sprintf(pbuf, " %s", chptr->mode.forward);
|
|
}
|
|
|
|
*mbuf = '\0';
|
|
|
|
rb_strlcpy(final, buf1, sizeof final);
|
|
rb_strlcat(final, buf2, sizeof final);
|
|
return final;
|
|
}
|
|
|
|
/* void send_cap_mode_changes(struct Client *client_p,
|
|
* struct Client *source_p,
|
|
* struct Channel *chptr, int cap, int nocap)
|
|
* Input: The client sending(client_p), the source client(source_p),
|
|
* the channel to send mode changes for(chptr)
|
|
* Output: None.
|
|
* Side-effects: Sends the appropriate mode changes to capable servers.
|
|
*
|
|
* Reverted back to my original design, except that we now keep a count
|
|
* of the number of servers which each combination as an optimisation, so
|
|
* the capabs combinations which are not needed are not worked out. -A1kmm
|
|
*
|
|
* Removed most code here because we don't need to be compatible with ircd
|
|
* 2.8.21+CSr and stuff. --nenolod
|
|
*/
|
|
void
|
|
send_cap_mode_changes(struct Client *client_p, struct Client *source_p,
|
|
struct Channel *chptr, struct ChModeChange mode_changes[], int mode_count)
|
|
{
|
|
static char modebuf[BUFSIZE];
|
|
static char parabuf[BUFSIZE];
|
|
int i, mbl, pbl, nc, mc, preflen, len;
|
|
char *pbuf;
|
|
const char *arg;
|
|
int dir;
|
|
int arglen;
|
|
|
|
/* Now send to servers... */
|
|
mc = 0;
|
|
nc = 0;
|
|
pbl = 0;
|
|
parabuf[0] = 0;
|
|
pbuf = parabuf;
|
|
dir = MODE_QUERY;
|
|
|
|
mbl = preflen = sprintf(modebuf, ":%s TMODE %ld %s ",
|
|
use_id(source_p), (long) chptr->channelts,
|
|
chptr->chname);
|
|
|
|
/* loop the list of - modes we have */
|
|
for (i = 0; i < mode_count; i++)
|
|
{
|
|
/* if they dont support the cap we need, or they do support a cap they
|
|
* cant have, then dont add it to the modebuf.. that way they wont see
|
|
* the mode
|
|
*/
|
|
if (mode_changes[i].letter == 0)
|
|
continue;
|
|
|
|
if (!EmptyString(mode_changes[i].id))
|
|
arg = mode_changes[i].id;
|
|
else
|
|
arg = mode_changes[i].arg;
|
|
|
|
if(arg)
|
|
{
|
|
arglen = strlen(arg);
|
|
|
|
/* dont even think about it! --fl */
|
|
if(arglen > MODEBUFLEN - 5)
|
|
continue;
|
|
}
|
|
|
|
/* if we're creeping past the buf size, we need to send it and make
|
|
* another line for the other modes
|
|
* XXX - this could give away server topology with uids being
|
|
* different lengths, but not much we can do, except possibly break
|
|
* them as if they were the longest of the nick or uid at all times,
|
|
* which even then won't work as we don't always know the uid -A1kmm.
|
|
*/
|
|
if(arg && ((mc == MAXMODEPARAMSSERV) ||
|
|
((mbl + pbl + arglen + 4) > (BUFSIZE - 3))))
|
|
{
|
|
if(nc != 0)
|
|
sendto_server(client_p, chptr, NOCAPS, NOCAPS,
|
|
"%s %s", modebuf, parabuf);
|
|
nc = 0;
|
|
mc = 0;
|
|
|
|
mbl = preflen;
|
|
pbl = 0;
|
|
pbuf = parabuf;
|
|
parabuf[0] = 0;
|
|
dir = MODE_QUERY;
|
|
}
|
|
|
|
if(dir != mode_changes[i].dir)
|
|
{
|
|
modebuf[mbl++] = (mode_changes[i].dir == MODE_ADD) ? '+' : '-';
|
|
dir = mode_changes[i].dir;
|
|
}
|
|
|
|
modebuf[mbl++] = mode_changes[i].letter;
|
|
modebuf[mbl] = 0;
|
|
nc++;
|
|
|
|
if(arg != NULL)
|
|
{
|
|
len = sprintf(pbuf, "%s ", arg);
|
|
pbuf += len;
|
|
pbl += len;
|
|
mc++;
|
|
}
|
|
}
|
|
|
|
if(pbl && parabuf[pbl - 1] == ' ')
|
|
parabuf[pbl - 1] = 0;
|
|
|
|
if(nc != 0)
|
|
sendto_server(client_p, chptr, NOCAPS, NOCAPS, "%s %s", modebuf, parabuf);
|
|
}
|
|
|
|
void
|
|
resv_chan_forcepart(const char *name, const char *reason, int temp_time)
|
|
{
|
|
rb_dlink_node *ptr;
|
|
rb_dlink_node *next_ptr;
|
|
struct Channel *chptr;
|
|
struct membership *msptr;
|
|
struct Client *target_p;
|
|
|
|
if(!ConfigChannel.resv_forcepart)
|
|
return;
|
|
|
|
/* for each user on our server in the channel list
|
|
* send them a PART, and notify opers.
|
|
*/
|
|
chptr = find_channel(name);
|
|
if(chptr != NULL)
|
|
{
|
|
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
|
|
{
|
|
msptr = ptr->data;
|
|
target_p = msptr->client_p;
|
|
|
|
if(IsExemptResv(target_p))
|
|
continue;
|
|
|
|
sendto_server(target_p, chptr, CAP_TS6, NOCAPS,
|
|
":%s PART %s", target_p->id, chptr->chname);
|
|
|
|
sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s PART %s :%s",
|
|
target_p->name, target_p->username,
|
|
target_p->host, chptr->chname, target_p->name);
|
|
|
|
remove_user_from_channel(msptr);
|
|
|
|
/* notify opers & user they were removed from the channel */
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL,
|
|
"Forced PART for %s!%s@%s from %s (%s)",
|
|
target_p->name, target_p->username,
|
|
target_p->host, name, reason);
|
|
|
|
if(temp_time > 0)
|
|
sendto_one_notice(target_p, ":*** Channel %s is temporarily unavailable on this server.",
|
|
name);
|
|
else
|
|
sendto_one_notice(target_p, ":*** Channel %s is no longer available on this server.",
|
|
name);
|
|
}
|
|
}
|
|
}
|