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construct/modules/m_knock.cc
2016-08-25 03:01:45 -07:00

169 lines
4.7 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
*/
using namespace ircd;
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 *, client::client &, client::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)
{
supported::add("KNOCK", []
{
return ConfigChannel.use_knock;
});
return 0;
}
static void
_moddeinit(void)
{
supported::del("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, client::client &client, client::client &source, int parc, const char *parv[])
{
chan::chan *chptr;
char *p, *name;
if(my(source) && ConfigChannel.use_knock == 0)
{
sendto_one(&source, form_str(ERR_KNOCKDISABLED),
me.name, source.name);
return;
}
name = LOCAL_COPY(parv[1]);
/* dont allow one knock to multiple chans */
if((p = strchr(name, ',')))
*p = '\0';
if((chptr = chan::get(name, std::nothrow)) == NULL)
{
sendto_one_numeric(&source, ERR_NOSUCHCHANNEL,
form_str(ERR_NOSUCHCHANNEL), name);
return;
}
if(is_member(chptr, &source))
{
if(my(source))
sendto_one(&source, form_str(ERR_KNOCKONCHAN),
me.name, source.name, name);
return;
}
if(!((chptr->mode.mode & chan::mode::INVITEONLY) || (*chptr->mode.key) ||
(chptr->mode.limit &&
size(chptr->members) >= (unsigned long)chptr->mode.limit)))
{
sendto_one_numeric(&source, ERR_CHANOPEN,
form_str(ERR_CHANOPEN), name);
return;
}
/* cant knock to a +p channel */
if(is_hidden(chptr))
{
sendto_one_numeric(&source, ERR_CANNOTSENDTOCHAN,
form_str(ERR_CANNOTSENDTOCHAN), name);
return;
}
if(my(source))
{
// don't allow a knock if the user is banned
if (check(*chptr, chan::mode::BAN, source) ||
check(*chptr, chan::mode::QUIET, source))
{
sendto_one_numeric(&source, 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(!is(source, umode::OPER) &&
(source.localClient->last_knock + ConfigChannel.knock_delay) > rb_current_time())
{
sendto_one(&source, form_str(ERR_TOOMANYKNOCK),
me.name, source.name, name, "user");
return;
}
else if((chptr->last_knock + ConfigChannel.knock_delay_channel) > rb_current_time())
{
sendto_one(&source, form_str(ERR_TOOMANYKNOCK),
me.name, source.name, name, "channel");
return;
}
/* ok, we actually can send the knock, tell client */
source.localClient->last_knock = rb_current_time();
sendto_one(&source, form_str(RPL_KNOCKDLVR),
me.name, source.name, name);
}
chptr->last_knock = rb_current_time();
if(ConfigChannel.use_knock)
sendto_channel_local(chptr->mode.mode & chan::mode::FREEINVITE ? chan::ALL_MEMBERS : chan::ONLY_CHANOPS,
chptr, form_str(RPL_KNOCK),
me.name, name, name, source.name,
source.username, source.host);
sendto_server(&client, chptr, CAP_KNOCK|CAP_TS6, NOCAPS,
":%s KNOCK %s", use_id(&source), name);
sendto_server(&client, chptr, CAP_KNOCK, CAP_TS6,
":%s KNOCK %s", source.name, name);
}