/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2017 B00mX0r <b00mx0r@aureus.pw>
* Copyright (C) 2013, 2018, 2020-2021 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012-2014, 2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
* Copyright (C) 2012 Justin Crawford <Justasic@Gmail.com>
* Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
* Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006 Oliver Lupton <om@inspircd.org>
* Copyright (C) 2005-2006, 2010 Craig Edwards <brain@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd 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, version 2.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/isupport.h"
/*
* This module supports the use of the +q and +a usermodes, but should work without them too.
* Usage of the command is restricted to +hoaq, and you cannot remove a user with a "higher" level than yourself.
* eg: +h can remove +hv and users with no modes. +a can remove +aohv and users with no modes.
*/
/** Base class for /FPART and /REMOVE
*/
class RemoveBase
: public Command
{
bool& supportnokicks;
ChanModeReference& nokicksmode;
public:
unsigned long protectedrank;
RemoveBase(Module* Creator, bool& snk, ChanModeReference& nkm, const char* cmdn)
: Command(Creator, cmdn, 2, 3)
, supportnokicks(snk)
, nokicksmode(nkm)
{
}
CmdResult HandleRMB(User* user, const CommandBase::Params& parameters, bool fpart)
{
User* target;
Channel* channel;
std::string reason;
// If the command is a /REMOVE then detect the parameter order
bool neworder = (fpart || ServerInstance->Channels.IsPrefix(parameters[0][0]));
/* Set these to the parameters needed, the new version of this module switches it's parameters around
* supplying a new command with the new order while keeping the old /remove with the older order.
* /remove <nick> <channel> [reason ...]
* /fpart <channel> <nick> [reason ...]
*/
const std::string& channame = parameters[neworder ? 0 : 1];
const std::string& username = parameters[neworder ? 1 : 0];
/* Look up the user we're meant to be removing from the channel */
if (IS_LOCAL(user))
target = ServerInstance->Users.FindNick(username);
else
target = ServerInstance->Users.Find(username);
/* And the channel we're meant to be removing them from */
channel = ServerInstance->Channels.Find(channame);
/* Fix by brain - someone needs to learn to validate their input! */
if (!channel)
{
user->WriteNumeric(Numerics::NoSuchChannel(channame));
return CmdResult::FAILURE;
}
if ((!target) || (target->registered != REG_ALL))
{
user->WriteNumeric(Numerics::NoSuchNick(username));
return CmdResult::FAILURE;
}
if (!channel->HasUser(target))
{
user->WriteNotice(InspIRCd::Format("*** User %s is not on channel %s", target->nick.c_str(), channel->name.c_str()));
return CmdResult::FAILURE;
}
if (target->server->IsService())
{
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, channame, "Only a service may remove a service from a channel.");
return CmdResult::FAILURE;
}
/* We support the +Q channel mode via. the m_nokicks module, if the module is loaded and the mode is set then disallow the /remove */
if ((!IS_LOCAL(user)) || (!supportnokicks) || (!channel->IsModeSet(nokicksmode)))
{
/* We'll let everyone remove their level and below, eg:
* ops can remove ops, halfops, voices, and those with no mode (no moders actually are set to 1)
* a services target will get a higher level than it's possible for a /remover to get..so they're safe.
* Nobody may remove people with >= protectedrank rank.
*/
unsigned int ulevel = channel->GetPrefixValue(user);
unsigned int tlevel = channel->GetPrefixValue(target);
if ((!IS_LOCAL(user)) || ((ulevel > VOICE_VALUE) && (ulevel >= tlevel) && ((protectedrank == 0) || (tlevel < protectedrank))))
{
// REMOVE will be sent to the target's server and it will reply with a PART (or do nothing if it doesn't understand the command)
if (!IS_LOCAL(target))
{
// Send an ENCAP REMOVE with parameters being in the old <user> <chan> order which is
// compatible with both 2.0 and 3.0. This also turns FPART into REMOVE.
CommandBase::Params p;
p.push_back(target->uuid);
p.push_back(channel->name);
if (parameters.size() > 2)
p.push_back(":" + parameters[2]);
ServerInstance->PI->SendEncapsulatedData(target->server->GetName(), "REMOVE", p, user);
return CmdResult::SUCCESS;
}
std::string reasonparam;
/* If a reason is given, use it */
if(parameters.size() > 2)
reasonparam = parameters[2];
else
reasonparam = "No reason given";
/* Build up the part reason string. */
reason = "Removed by " + user->nick + ": " + reasonparam;
channel->WriteRemoteNotice(InspIRCd::Format("%s removed %s from the channel", user->nick.c_str(), target->nick.c_str()));
target->WriteNotice("*** " + user->nick + " removed you from " + channel->name + " with the message: " + reasonparam);
channel->PartUser(target, reason);
}
else
{
user->WriteNotice(InspIRCd::Format("*** You do not have access to /REMOVE %s from %s", target->nick.c_str(), channel->name.c_str()));
return CmdResult::FAILURE;
}
}
else
{
/* m_nokicks.so was loaded and +Q was set, block! */
user->WriteNumeric(ERR_RESTRICTED, channel->name, InspIRCd::Format("Can't remove user %s from channel (+Q is set)", target->nick.c_str()));
return CmdResult::FAILURE;
}
return CmdResult::SUCCESS;
}
};
class CommandRemove final
: public RemoveBase
{
public:
CommandRemove(Module* Creator, bool& snk, ChanModeReference& nkm)
: RemoveBase(Creator, snk, nkm, "REMOVE")
{
syntax = { "<channel> <nick> [:<reason>]" };
translation = { TR_NICK, TR_TEXT, TR_TEXT };
}
CmdResult Handle(User* user, const Params& parameters) override
{
return HandleRMB(user, parameters, false);
}
};
class CommandFpart final
: public RemoveBase
{
public:
CommandFpart(Module* Creator, bool& snk, ChanModeReference& nkm)
: RemoveBase(Creator, snk, nkm, "FPART")
{
syntax = { "<channel> <nick> [:<reason>]" };
translation = { TR_TEXT, TR_NICK, TR_TEXT };
}
CmdResult Handle(User* user, const Params& parameters) override
{
return HandleRMB(user, parameters, true);
}
};
class ModuleRemove final
: public Module
, public ISupport::EventListener
{
private:
ChanModeReference nokicksmode;
CommandRemove cmd1;
CommandFpart cmd2;
bool supportnokicks;
public:
ModuleRemove()
: Module(VF_VENDOR | VF_OPTCOMMON, "Adds the /FPART and /REMOVE commands which allows channel operators to force part users from a channel.")
, ISupport::EventListener(this)
, nokicksmode(this, "nokick")
, cmd1(this, supportnokicks, nokicksmode)
, cmd2(this, supportnokicks, nokicksmode)
{
}
void OnBuildISupport(ISupport::TokenMap& tokens) override
{
tokens["REMOVE"];
}
void ReadConfig(ConfigStatus& status) override
{
auto tag = ServerInstance->Config->ConfValue("remove");
supportnokicks = tag->getBool("supportnokicks");
cmd1.protectedrank = cmd2.protectedrank = tag->getUInt("protectedrank", 50000);
}
};
MODULE_INIT(ModuleRemove)
