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/*
* ircd-ratbox: A slightly useful ircd.
* m_knock.c: Requests to be invited to a channel.
*
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: m_knock.c 3570 2007-09-09 19:19:23Z jilles $
*/
#include "stdinc.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
static int m_knock(struct Client *, struct Client *, int, const char **);
struct Message knock_msgtab = {
"KNOCK", 0, 0, 0, MFLG_SLOW,
{mg_unreg, {m_knock, 2}, {m_knock, 2}, mg_ignore, mg_ignore, {m_knock, 2}}
};
mapi_clist_av1 knock_clist[] = { &knock_msgtab, NULL };
DECLARE_MODULE_AV1(knock, NULL, NULL, knock_clist, NULL, NULL, "$Revision: 3570 $");
/* m_knock
* parv[1] = channel
*
* The KNOCK command has the following syntax:
* :<sender> KNOCK <channel>
*
* If a user is not banned from the channel they can use the KNOCK
* command to have the server NOTICE the channel operators notifying
* they would like to join. Helpful if the channel is invite-only, the
* key is forgotten, or the channel is full (INVITE can bypass each one
* of these conditions. Concept by Dianora <db@db.net> and written by
* <anonymous>
*/
static int
m_knock(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct Channel *chptr;
char *p, *name;
if(MyClient(source_p) && ConfigChannel.use_knock == 0)
{
sendto_one(source_p, form_str(ERR_KNOCKDISABLED),
me.name, source_p->name);
return 0;
}
name = LOCAL_COPY(parv[1]);
/* dont allow one knock to multiple chans */
if((p = strchr(name, ',')))
*p = '\0';
if((chptr = find_channel(name)) == NULL)
{
sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
form_str(ERR_NOSUCHCHANNEL), name);
return 0;
}
if(IsMember(source_p, chptr))
{
if(MyClient(source_p))
sendto_one(source_p, form_str(ERR_KNOCKONCHAN),
me.name, source_p->name, name);
return 0;
}
if(!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
(chptr->mode.limit &&
rb_dlink_list_length(&chptr->members) >= (unsigned long)chptr->mode.limit)))
{
sendto_one_numeric(source_p, ERR_CHANOPEN,
form_str(ERR_CHANOPEN), name);
return 0;
}
/* cant knock to a +p channel */
if(HiddenChannel(chptr))
{
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), name);
return 0;
}
if(MyClient(source_p))
{
/* don't allow a knock if the user is banned */
if(is_banned(chptr, source_p, NULL, NULL, NULL, NULL) == CHFL_BAN ||
is_quieted(chptr, source_p, NULL, NULL, NULL) == CHFL_BAN)
{
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), name);
return 0;
}
/* local flood protection:
* allow one knock per user per knock_delay
* allow one knock per channel per knock_delay_channel
*/
if(!IsOper(source_p) &&
(source_p->localClient->last_knock + ConfigChannel.knock_delay) > rb_current_time())
{
sendto_one(source_p, form_str(ERR_TOOMANYKNOCK),
me.name, source_p->name, name, "user");
return 0;
}
else if((chptr->last_knock + ConfigChannel.knock_delay_channel) > rb_current_time())
{
sendto_one(source_p, form_str(ERR_TOOMANYKNOCK),
me.name, source_p->name, name, "channel");
return 0;
}
/* ok, we actually can send the knock, tell client */
source_p->localClient->last_knock = rb_current_time();
sendto_one(source_p, form_str(RPL_KNOCKDLVR),
me.name, source_p->name, name);
}
chptr->last_knock = rb_current_time();
if(ConfigChannel.use_knock)
sendto_channel_local(chptr->mode.mode & MODE_FREEINVITE ? ALL_MEMBERS : ONLY_CHANOPS,
chptr, form_str(RPL_KNOCK),
me.name, name, name, source_p->name,
source_p->username, source_p->host);
sendto_server(client_p, chptr, CAP_KNOCK|CAP_TS6, NOCAPS,
":%s KNOCK %s", use_id(source_p), name);
sendto_server(client_p, chptr, CAP_KNOCK, CAP_TS6,
":%s KNOCK %s", source_p->name, name);
return 0;
}
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