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/*
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
*
* Copyright (c) 1998-2014 ircd-hybrid 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
*/
/*! \file m_knock.c
* \brief Includes required functions for processing the KNOCK command.
* \version $Id$
*/
#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_user.h"
/* m_knock
* parv[0] = sender prefix
* 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, char *parv[])
{
struct Channel *chptr = NULL;
if (EmptyString(parv[1]))
{
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
me.name, source_p->name, "KNOCK");
return 0;
}
if ((chptr = hash_find_channel(parv[1])) == NULL)
{
sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
me.name, source_p->name, parv[1]);
return 0;
}
/* Normal channel, just be sure they aren't on it */
if (IsMember(source_p, chptr))
{
sendto_one(source_p, form_str(ERR_KNOCKONCHAN), me.name,
source_p->name, chptr->chname);
return 0;
}
if (!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
(chptr->mode.limit && dlink_list_length(&chptr->members) >=
chptr->mode.limit)))
{
sendto_one(source_p, form_str(ERR_CHANOPEN), me.name,
source_p->name, chptr->chname);
return 0;
}
if (MyClient(source_p))
{
/*
* Don't allow a knock if the user is banned, or the channel is private
*/
if (PrivateChannel(chptr) || is_banned(chptr, source_p))
{
sendto_one(source_p, form_str(ERR_CANNOTSENDTOCHAN),
me.name, source_p->name, chptr->chname);
return 0;
}
/*
* flood protection:
* allow one knock per user per knock_delay
* allow one knock per channel per knock_delay_channel
*
* we only limit local requests..
*/
if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
CurrentTime)
{
sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
source_p->name, chptr->chname, "user");
return 0;
}
if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
{
sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
source_p->name, chptr->chname, "channel");
return 0;
}
source_p->localClient->last_knock = CurrentTime;
sendto_one(source_p, form_str(RPL_KNOCKDLVR), me.name,
source_p->name, chptr->chname);
}
chptr->last_knock = CurrentTime;
sendto_channel_local(CHFL_CHANOP, 0, chptr,
":%s NOTICE @%s :KNOCK: %s (%s [%s@%s] has asked for an invite)",
me.name, chptr->chname, chptr->chname,
source_p->name,
source_p->username,
source_p->host);
sendto_server(client_p, CAP_KNOCK|CAP_TS6, NOCAPS,
":%s KNOCK %s", ID(source_p), chptr->chname);
sendto_server(client_p, CAP_KNOCK, CAP_TS6,
":%s KNOCK %s", source_p->name, chptr->chname);
return 0;
}
static struct Message knock_msgtab =
{
"KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
};
static void
module_init(void)
{
mod_add_cmd(&knock_msgtab);
add_capability("KNOCK", CAP_KNOCK, 1);
add_isupport("KNOCK", NULL, -1);
}
static void
module_exit(void)
{
mod_del_cmd(&knock_msgtab);
delete_capability("KNOCK");
delete_isupport("KNOCK");
}
struct module module_entry =
{
.node = { NULL, NULL, NULL },
.name = NULL,
.version = "$Revision$",
.handle = NULL,
.modinit = module_init,
.modexit = module_exit,
.flags = 0
};
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