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construct/modules/m_knock.c
Elizabeth Myers 3c7d6fcce7 Message handlers should return void.
Also fix up some return values and stuff to use bool (or void if
nothing). I just did it whilst I was here.

According to jilles, the return value used to signify whether or not the
client had exited. This was error-prone and was fixed a long, long time
ago, but the return value was left int for historical reasons.

Since the return type is not used (and has no clear use case anyway),
it's safe to just get rid of it.
2016-03-09 01:37:03 -06:00

179 lines
5.1 KiB
C

/*
* 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
*/
#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"
#include "supported.h"
static const char knock_desc[] = "Provides the KNOCK command to ask for an invite to an invite-only channel";
static void m_knock(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
struct Message knock_msgtab = {
"KNOCK", 0, 0, 0, 0,
{mg_unreg, {m_knock, 2}, {m_knock, 2}, mg_ignore, mg_ignore, {m_knock, 2}}
};
static int
_modinit(void)
{
add_isupport("KNOCK", isupport_boolean, &ConfigChannel.use_knock);
return 0;
}
static void
_moddeinit(void)
{
delete_isupport("KNOCK");
}
mapi_clist_av1 knock_clist[] = { &knock_msgtab, NULL };
DECLARE_MODULE_AV2(knock, _modinit, _moddeinit, knock_clist, NULL, NULL, NULL, NULL, knock_desc);
/* 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 void
m_knock(struct MsgBuf *msgbuf_p, 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;
}
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;
}
if(IsMember(source_p, chptr))
{
if(MyClient(source_p))
sendto_one(source_p, form_str(ERR_KNOCKONCHAN),
me.name, source_p->name, name);
return;
}
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;
}
/* cant knock to a +p channel */
if(HiddenChannel(chptr))
{
sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), name);
return;
}
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;
}
/* 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;
}
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;
}
/* 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);
}