2007-01-25 07:40:21 +01:00
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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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2016-08-13 05:05:54 +02:00
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using namespace ircd;
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2016-03-09 08:29:41 +01:00
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static const char knock_desc[] = "Provides the KNOCK command to ask for an invite to an invite-only channel";
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2016-08-22 03:57:43 +02:00
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static void m_knock(struct MsgBuf *, client::client *, client::client *, int, const char **);
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2007-01-25 07:40:21 +01:00
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struct Message knock_msgtab = {
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2016-02-19 23:42:40 +01:00
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"KNOCK", 0, 0, 0, 0,
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2007-01-25 07:40:21 +01:00
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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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2015-12-27 05:41:09 +01:00
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static int
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_modinit(void)
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{
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add_isupport("KNOCK", isupport_boolean, &ConfigChannel.use_knock);
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return 0;
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}
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static void
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_moddeinit(void)
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{
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delete_isupport("KNOCK");
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}
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2007-01-25 07:40:21 +01:00
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mapi_clist_av1 knock_clist[] = { &knock_msgtab, NULL };
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2016-03-07 09:11:50 +01:00
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DECLARE_MODULE_AV2(knock, _modinit, _moddeinit, knock_clist, NULL, NULL, NULL, NULL, knock_desc);
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2007-01-25 07:40:21 +01:00
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/* m_knock
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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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2016-03-09 08:37:03 +01:00
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static void
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2016-08-22 03:57:43 +02:00
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m_knock(struct MsgBuf *msgbuf_p, client::client *client_p, client::client *source_p, int parc, const char *parv[])
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2007-01-25 07:40:21 +01:00
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{
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2016-08-18 07:33:38 +02:00
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chan::chan *chptr;
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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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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2016-08-20 04:51:37 +02:00
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if((chptr = chan::get(name, std::nothrow)) == NULL)
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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2016-08-18 07:33:38 +02:00
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if(is_member(chptr, source_p))
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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2016-08-17 05:01:20 +02:00
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if(!((chptr->mode.mode & chan::mode::INVITEONLY) || (*chptr->mode.key) ||
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2014-03-03 05:25:47 +01:00
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(chptr->mode.limit &&
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2016-08-20 02:32:26 +02:00
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size(chptr->members) >= (unsigned long)chptr->mode.limit)))
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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/* cant knock to a +p channel */
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2016-08-19 01:33:46 +02:00
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if(is_hidden(chptr))
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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2014-03-03 05:25:47 +01:00
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2007-01-25 07:40:21 +01:00
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if(MyClient(source_p))
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{
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2016-08-19 07:58:17 +02:00
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// don't allow a knock if the user is banned
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if (check(*chptr, chan::mode::BAN, *source_p) ||
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check(*chptr, chan::mode::QUIET, *source_p))
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2007-01-25 07:40:21 +01:00
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{
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2016-08-19 07:58:17 +02:00
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sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, form_str(ERR_CANNOTSENDTOCHAN), name);
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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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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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2014-03-03 05:25:47 +01:00
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if(!IsOper(source_p) &&
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2008-04-02 01:53:20 +02:00
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(source_p->localClient->last_knock + ConfigChannel.knock_delay) > rb_current_time())
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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2008-04-02 01:53:20 +02:00
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else if((chptr->last_knock + ConfigChannel.knock_delay_channel) > rb_current_time())
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2007-01-25 07:40:21 +01:00
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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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2016-03-09 08:37:03 +01:00
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return;
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2007-01-25 07:40:21 +01:00
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}
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/* ok, we actually can send the knock, tell client */
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2008-04-02 01:53:20 +02:00
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source_p->localClient->last_knock = rb_current_time();
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2007-01-25 07:40:21 +01:00
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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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2008-04-02 01:53:20 +02:00
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chptr->last_knock = rb_current_time();
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2007-01-25 07:40:21 +01:00
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if(ConfigChannel.use_knock)
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2016-08-18 07:33:38 +02:00
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sendto_channel_local(chptr->mode.mode & chan::mode::FREEINVITE ? chan::ALL_MEMBERS : chan::ONLY_CHANOPS,
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2007-09-09 21:19:23 +02:00
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chptr, form_str(RPL_KNOCK),
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2007-01-25 07:40:21 +01:00
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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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}
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