2 * ircd-ratbox: A slightly useful ircd.
3 * m_knock.c: Requests to be invited to a channel.
5 * Copyright (C) 1996-2002 Hybrid Development Team
6 * Copyright (C) 2002-2005 ircd-ratbox development team
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
37 #include "supported.h"
38 #include "s_newconf.h"
40 static const char knock_desc
[] = "Provides the KNOCK command to ask for an invite to an invite-only channel";
42 static void m_knock(struct MsgBuf
*, struct Client
*, struct Client
*, int, const char **);
44 struct Message knock_msgtab
= {
46 {mg_unreg
, {m_knock
, 2}, {m_knock
, 2}, mg_ignore
, mg_ignore
, {m_knock
, 2}}
52 add_isupport("KNOCK", isupport_boolean
, &ConfigChannel
.use_knock
);
59 delete_isupport("KNOCK");
62 mapi_clist_av1 knock_clist
[] = { &knock_msgtab
, NULL
};
64 DECLARE_MODULE_AV2(knock
, _modinit
, _moddeinit
, knock_clist
, NULL
, NULL
, NULL
, NULL
, knock_desc
);
69 * The KNOCK command has the following syntax:
70 * :<sender> KNOCK <channel>
72 * If a user is not banned from the channel they can use the KNOCK
73 * command to have the server NOTICE the channel operators notifying
74 * they would like to join. Helpful if the channel is invite-only, the
75 * key is forgotten, or the channel is full (INVITE can bypass each one
76 * of these conditions. Concept by Dianora <db@db.net> and written by
80 m_knock(struct MsgBuf
*msgbuf_p
, struct Client
*client_p
, struct Client
*source_p
, int parc
, const char *parv
[])
82 struct Channel
*chptr
;
85 if(MyClient(source_p
) && ConfigChannel
.use_knock
== 0)
87 sendto_one(source_p
, form_str(ERR_KNOCKDISABLED
),
88 me
.name
, source_p
->name
);
92 name
= LOCAL_COPY(parv
[1]);
94 /* dont allow one knock to multiple chans */
95 if((p
= strchr(name
, ',')))
98 if((chptr
= find_channel(name
)) == NULL
)
100 sendto_one_numeric(source_p
, ERR_NOSUCHCHANNEL
,
101 form_str(ERR_NOSUCHCHANNEL
), name
);
105 if(IsMember(source_p
, chptr
))
107 if(MyClient(source_p
))
108 sendto_one(source_p
, form_str(ERR_KNOCKONCHAN
),
109 me
.name
, source_p
->name
, name
);
113 if(!((chptr
->mode
.mode
& MODE_INVITEONLY
) || (*chptr
->mode
.key
) ||
114 (chptr
->mode
.limit
&&
115 rb_dlink_list_length(&chptr
->members
) >= (unsigned long)chptr
->mode
.limit
)))
117 sendto_one_numeric(source_p
, ERR_CHANOPEN
,
118 form_str(ERR_CHANOPEN
), name
);
122 /* cant knock to a +p channel */
123 if(HiddenChannel(chptr
))
125 sendto_one_numeric(source_p
, ERR_CANNOTSENDTOCHAN
,
126 form_str(ERR_CANNOTSENDTOCHAN
), name
);
131 if(MyClient(source_p
))
133 /* don't allow a knock if the user is banned */
134 if(is_banned(chptr
, source_p
, NULL
, NULL
, NULL
) == CHFL_BAN
||
135 is_quieted(chptr
, source_p
, NULL
, NULL
) == CHFL_BAN
)
137 sendto_one_numeric(source_p
, ERR_CANNOTSENDTOCHAN
,
138 form_str(ERR_CANNOTSENDTOCHAN
), name
);
142 /* local flood protection:
143 * allow one knock per user per knock_delay
144 * allow one knock per channel per knock_delay_channel
146 if(!IsOperGeneral(source_p
) &&
147 (source_p
->localClient
->last_knock
+ ConfigChannel
.knock_delay
) > rb_current_time())
149 sendto_one(source_p
, form_str(ERR_TOOMANYKNOCK
),
150 me
.name
, source_p
->name
, name
, "user");
153 else if((chptr
->last_knock
+ ConfigChannel
.knock_delay_channel
) > rb_current_time())
155 sendto_one(source_p
, form_str(ERR_TOOMANYKNOCK
),
156 me
.name
, source_p
->name
, name
, "channel");
160 /* ok, we actually can send the knock, tell client */
161 source_p
->localClient
->last_knock
= rb_current_time();
163 sendto_one(source_p
, form_str(RPL_KNOCKDLVR
),
164 me
.name
, source_p
->name
, name
);
167 chptr
->last_knock
= rb_current_time();
169 if(ConfigChannel
.use_knock
)
170 sendto_channel_local(source_p
, (chptr
->mode
.mode
& MODE_FREEINVITE
) ? ALL_MEMBERS
: ONLY_CHANOPS
,
171 chptr
, form_str(RPL_KNOCK
),
172 me
.name
, name
, name
, source_p
->name
,
173 source_p
->username
, source_p
->host
);
175 sendto_server(client_p
, chptr
, CAP_KNOCK
|CAP_TS6
, NOCAPS
,
176 ":%s KNOCK %s", use_id(source_p
), name
);
177 sendto_server(client_p
, chptr
, CAP_KNOCK
, CAP_TS6
,
178 ":%s KNOCK %s", source_p
->name
, name
);