mirror of
https://github.com/matrix-construct/construct
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175 lines
4.9 KiB
C
175 lines
4.9 KiB
C
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/*
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* ircd-ratbox: A slightly useful ircd.
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* m_knock.c: Requests to be invited to a channel.
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*
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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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* $Id: m_knock.c 752 2006-02-11 20:55:03Z jilles $
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*/
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#include "stdinc.h"
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#include "sprintf_irc.h"
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#include "tools.h"
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#include "channel.h"
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#include "client.h"
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#include "hash.h"
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#include "irc_string.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "send.h"
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#include "s_conf.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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#include "s_serv.h"
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static int m_knock(struct Client *, struct Client *, int, const char **);
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struct Message knock_msgtab = {
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"KNOCK", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, {m_knock, 2}, {m_knock, 2}, mg_ignore, mg_ignore, {m_knock, 2}}
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};
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mapi_clist_av1 knock_clist[] = { &knock_msgtab, NULL };
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DECLARE_MODULE_AV1(knock, NULL, NULL, knock_clist, NULL, NULL, "$Revision: 752 $");
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/* m_knock
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* parv[0] = sender prefix
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* parv[1] = channel
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*
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* The KNOCK command has the following syntax:
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* :<sender> KNOCK <channel>
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*
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* If a user is not banned from the channel they can use the KNOCK
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* command to have the server NOTICE the channel operators notifying
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* they would like to join. Helpful if the channel is invite-only, the
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* key is forgotten, or the channel is full (INVITE can bypass each one
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* of these conditions. Concept by Dianora <db@db.net> and written by
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* <anonymous>
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*/
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static int
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m_knock(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Channel *chptr;
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char *p, *name;
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if(MyClient(source_p) && ConfigChannel.use_knock == 0)
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{
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sendto_one(source_p, form_str(ERR_KNOCKDISABLED),
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me.name, source_p->name);
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return 0;
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}
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name = LOCAL_COPY(parv[1]);
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/* dont allow one knock to multiple chans */
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if((p = strchr(name, ',')))
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*p = '\0';
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if(!IsChannelName(name))
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), name);
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return 0;
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}
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if((chptr = find_channel(name)) == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), name);
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return 0;
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}
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if(IsMember(source_p, chptr))
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{
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if(MyClient(source_p))
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sendto_one(source_p, form_str(ERR_KNOCKONCHAN),
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me.name, source_p->name, name);
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return 0;
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}
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if(!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
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(chptr->mode.limit &&
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dlink_list_length(&chptr->members) >= (unsigned long)chptr->mode.limit)))
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{
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sendto_one_numeric(source_p, ERR_CHANOPEN,
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form_str(ERR_CHANOPEN), name);
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return 0;
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}
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/* cant knock to a +p channel */
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if(HiddenChannel(chptr))
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{
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sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
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form_str(ERR_CANNOTSENDTOCHAN), name);
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return 0;
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}
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if(MyClient(source_p))
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{
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/* don't allow a knock if the user is banned */
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if(is_banned(chptr, source_p, NULL, NULL, NULL) == CHFL_BAN ||
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is_quieted(chptr, source_p, NULL, NULL, NULL) == CHFL_BAN)
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{
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sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
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form_str(ERR_CANNOTSENDTOCHAN), name);
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return 0;
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}
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/* local flood protection:
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* allow one knock per user per knock_delay
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* allow one knock per channel per knock_delay_channel
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*/
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if(!IsOper(source_p) &&
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(source_p->localClient->last_knock + ConfigChannel.knock_delay) > CurrentTime)
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{
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sendto_one(source_p, form_str(ERR_TOOMANYKNOCK),
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me.name, source_p->name, name, "user");
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return 0;
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}
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else if((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
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{
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sendto_one(source_p, form_str(ERR_TOOMANYKNOCK),
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me.name, source_p->name, name, "channel");
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return 0;
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}
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/* ok, we actually can send the knock, tell client */
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source_p->localClient->last_knock = CurrentTime;
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sendto_one(source_p, form_str(RPL_KNOCKDLVR),
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me.name, source_p->name, name);
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}
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chptr->last_knock = CurrentTime;
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if(ConfigChannel.use_knock)
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sendto_channel_local(ONLY_CHANOPS, chptr, form_str(RPL_KNOCK),
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me.name, name, name, source_p->name,
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source_p->username, source_p->host);
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sendto_server(client_p, chptr, CAP_KNOCK|CAP_TS6, NOCAPS,
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":%s KNOCK %s", use_id(source_p), name);
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sendto_server(client_p, chptr, CAP_KNOCK, CAP_TS6,
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":%s KNOCK %s", source_p->name, name);
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return 0;
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}
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