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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 1998-2020 ircd-hybrid 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file m_knock.c |
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* \brief Includes required functions for processing the KNOCK command. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "list.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 "irc_string.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 "conf.h" |
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#include "parse.h" |
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#include "modules.h" |
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#include "server_capab.h" |
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#include "user.h" |
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#include "isupport.h" |
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|
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|
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/*! \brief KNOCK command handler |
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* |
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* \param source_p Pointer to allocated Client struct from which the message |
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* originally comes from. This can be a local or remote client. |
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* \param parc Integer holding the number of supplied arguments. |
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
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* \note Valid arguments for this command are: |
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* - parv[0] = command |
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* - parv[1] = channel name |
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*/ |
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static void |
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m_knock(struct Client *source_p, int parc, char *parv[]) |
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{ |
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const char *const name = parv[1]; |
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|
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if (EmptyString(name)) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KNOCK"); |
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return; |
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} |
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|
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struct Channel *channel; |
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if ((channel = hash_find_channel(name)) == NULL) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, name); |
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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, channel)) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_KNOCKONCHAN, channel->name); |
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return; |
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} |
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|
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if (!((channel->mode.mode & MODE_INVITEONLY) || channel->mode.key[0] || |
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(channel->mode.limit && dlink_list_length(&channel->members) >= |
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channel->mode.limit))) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_CHANOPEN, channel->name); |
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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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/* |
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* Don't allow a knock if the user is banned, or the channel is private. |
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*/ |
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if (PrivateChannel(channel) || is_banned(channel, source_p) == true) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_CANNOTSENDTOCHAN, channel->name); |
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return; |
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} |
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|
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if ((source_p->connection->knock.last_attempt + ConfigChannel.knock_client_time) < event_base->time.sec_monotonic) |
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source_p->connection->knock.count = 0; |
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|
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if (source_p->connection->knock.count > ConfigChannel.knock_client_count) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, channel->name, "user"); |
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return; |
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} |
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|
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if ((channel->last_knock_time + ConfigChannel.knock_delay_channel) > event_base->time.sec_monotonic) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, channel->name, "channel"); |
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return; |
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} |
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|
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source_p->connection->knock.last_attempt = event_base->time.sec_monotonic; |
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source_p->connection->knock.count++; |
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|
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sendto_one_numeric(source_p, &me, RPL_KNOCKDLVR, channel->name); |
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} |
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|
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channel->last_knock_time = event_base->time.sec_monotonic; |
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sendto_channel_local(NULL, channel, CHFL_CHANOP | CHFL_HALFOP, 0, 0, |
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":%s NOTICE %%%s :KNOCK: %s (%s [%s@%s] has asked for an invite)", |
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me.name, channel->name, channel->name, |
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source_p->name, |
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source_p->username, |
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source_p->host); |
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|
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sendto_server(source_p, CAPAB_KNOCK, 0, ":%s KNOCK %s", |
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source_p->id, channel->name); |
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} |
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|
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static struct Message knock_msgtab = |
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{ |
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.cmd = "KNOCK", |
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.args_min = 2, |
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.args_max = MAXPARA, |
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.handlers[UNREGISTERED_HANDLER] = m_unregistered, |
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.handlers[CLIENT_HANDLER] = m_knock, |
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.handlers[SERVER_HANDLER] = m_knock, |
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.handlers[ENCAP_HANDLER] = m_ignore, |
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.handlers[OPER_HANDLER] = m_knock |
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}; |
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|
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static void |
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module_init(void) |
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{ |
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mod_add_cmd(&knock_msgtab); |
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capab_add("KNOCK", CAPAB_KNOCK); |
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isupport_add("KNOCK", NULL, -1); |
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} |
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|
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static void |
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module_exit(void) |
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{ |
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mod_del_cmd(&knock_msgtab); |
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capab_del("KNOCK"); |
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isupport_delete("KNOCK"); |
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} |
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|
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struct module module_entry = |
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{ |
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.version = "$Revision$", |
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.modinit = module_init, |
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.modexit = module_exit, |
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}; |
