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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(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) 2002 by the past and present ircd coders, and others. |
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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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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "handlers.h" |
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#include "channel.h" |
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#include "channel_mode.h" |
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#include "client.h" |
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#include "hash.h" |
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#include "ircd.h" |
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#include "numeric.h" |
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#include "send.h" |
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#include "s_conf.h" |
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#include "msg.h" |
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#include "parse.h" |
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#include "conf/modules.h" |
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#include "s_serv.h" |
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#include "s_user.h" |
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#include "common.h" |
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|
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static void m_knock(struct Client *, struct Client *, int, char *[]); |
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|
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struct Message knock_msgtab = { |
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"KNOCK", 0, 0, 2, 0, MFLG_SLOW, 0, |
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{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore } |
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}; |
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|
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INIT_MODULE(m_knock, "$Revision$") |
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{ |
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mod_add_cmd(&knock_msgtab); |
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add_capability("KNOCK", CAP_KNOCK, 1); |
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add_isupport("KNOCK", NULL, -1); |
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} |
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|
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CLEANUP_MODULE |
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{ |
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delete_isupport("KNOCK"); |
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delete_capability("KNOCK"); |
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mod_del_cmd(&knock_msgtab); |
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} |
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|
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/* m_knock |
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* parv[0] = sender prefix |
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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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static void |
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m_knock(struct Client *client_p, struct Client *source_p, |
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int parc, char *parv[]) |
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{ |
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struct Channel *chptr = NULL; |
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|
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if (*parv[1] == '\0') |
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{ |
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), |
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me.name, source_p->name, "KNOCK"); |
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return; |
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} |
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|
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if (!ConfigChannel.use_knock && MyClient(source_p)) |
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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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return; |
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} |
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|
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if ((chptr = hash_find_channel(parv[1])) == NULL) |
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{ |
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sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL), |
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me.name, source_p->name, parv[1]); |
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return; |
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} |
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|
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/* Normal channel, just be sure they aren't on it */ |
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if (IsMember(source_p, chptr)) |
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{ |
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sendto_one(source_p, form_str(ERR_KNOCKONCHAN), me.name, |
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source_p->name, chptr->chname); |
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return; |
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} |
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|
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if (!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) || |
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(chptr->mode.limit && dlink_list_length(&chptr->members) >= |
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chptr->mode.limit))) |
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{ |
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sendto_one(source_p, form_str(ERR_CHANOPEN), me.name, |
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source_p->name, chptr->chname); |
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return; |
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} |
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|
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if (MyClient(source_p)) |
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{ |
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/* don't allow a knock if the user is banned, or the channel is secret */ |
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if ((chptr->mode.mode & MODE_PARANOID) || is_banned(chptr, source_p)) |
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{ |
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sendto_one(source_p, form_str(ERR_CANNOTSENDTOCHAN), |
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me.name, source_p->name, chptr->chname); |
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return; |
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} |
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|
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/* |
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* 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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* we only limit local requests.. |
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*/ |
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if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) > |
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CurrentTime) |
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{ |
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sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name, |
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source_p->name, chptr->chname, "user"); |
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return; |
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} |
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|
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if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime) |
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{ |
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sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name, |
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source_p->name, chptr->chname, "channel"); |
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return; |
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} |
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|
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source_p->localClient->last_knock = CurrentTime; |
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|
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sendto_one(source_p, form_str(RPL_KNOCKDLVR), me.name, |
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source_p->name, chptr->chname); |
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} |
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|
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chptr->last_knock = CurrentTime; |
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|
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if (ConfigChannel.use_knock) |
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sendto_channel_local(CHFL_CHANOP, NO, chptr, form_str(RPL_KNOCK), |
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me.name, chptr->chname, chptr->chname, |
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source_p->name, source_p->username, |
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source_p->host); |
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|
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sendto_server(client_p, source_p, chptr, CAP_KNOCK|CAP_TS6, NOCAPS, |
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":%s KNOCK %s %s", ID(source_p), chptr->chname); |
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sendto_server(client_p, source_p, chptr, CAP_KNOCK, CAP_TS6, |
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":%s KNOCK %s %s", source_p->name, chptr->chname); |
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} |
