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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2004, 2006 Craig Edwards <craigedwards@brainbox.cc>
* Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
*
* 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"
/* $ModDesc: Provides channel mode +L (limit redirection) */
/** Handle channel mode +L
*/
class Redirect : public ModeHandler
{
public:
Redirect(Module* Creator) : ModeHandler(Creator, "redirect", 'L', PARAM_SETONLY, MODETYPE_CHANNEL) { }
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
if (IS_LOCAL(source))
{
if (!ServerInstance->IsChannel(parameter.c_str(), ServerInstance->Config->Limits.ChanMax))
{
source->WriteNumeric(403, "%s %s :Invalid channel name", source->nick.c_str(), parameter.c_str());
parameter.clear();
return MODEACTION_DENY;
}
}
if (IS_LOCAL(source) && !IS_OPER(source))
{
Channel* c = ServerInstance->FindChan(parameter);
if (!c)
{
source->WriteNumeric(690, "%s :Target channel %s must exist to be set as a redirect.",source->nick.c_str(),parameter.c_str());
parameter.clear();
return MODEACTION_DENY;
}
else if (c->GetPrefixValue(source) < OP_VALUE)
{
source->WriteNumeric(690, "%s :You must be opped on %s to set it as a redirect.",source->nick.c_str(),parameter.c_str());
parameter.clear();
return MODEACTION_DENY;
}
}
if (channel->GetModeParameter('L') == parameter)
return MODEACTION_DENY;
/*
* We used to do some checking for circular +L here, but there is no real need for this any more especially as we
* now catch +L looping in PreJoin. Remove it, since O(n) logic makes me sad, and we catch it anyway. :) -- w00t
*/
channel->SetModeParam('L', parameter);
return MODEACTION_ALLOW;
}
else
{
if (channel->IsModeSet('L'))
{
channel->SetModeParam('L', "");
return MODEACTION_ALLOW;
}
}
return MODEACTION_DENY;
}
};
class ModuleRedirect : public Module
{
Redirect re;
public:
ModuleRedirect()
: re(this)
{
if (!ServerInstance->Modes->AddMode(&re))
throw ModuleException("Could not add new modes!");
Implementation eventlist[] = { I_OnUserPreJoin };
ServerInstance->Modules->Attach(eventlist, this, 1);
}
virtual ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
{
if (chan)
{
if (chan->IsModeSet('L') && chan->IsModeSet('l'))
{
if (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str()))
{
std::string channel = chan->GetModeParameter('L');
/* sometimes broken ulines can make circular or chained +L, avoid this */
Channel* destchan = NULL;
destchan = ServerInstance->FindChan(channel);
if (destchan && destchan->IsModeSet('L'))
{
user->WriteNumeric(470, "%s %s * :You may not join this channel. A redirect is set, but you may not be redirected as it is a circular loop.", user->nick.c_str(), cname);
return MOD_RES_DENY;
}
user->WriteNumeric(470, "%s %s %s :You may not join this channel, so you are automatically being transferred to the redirect channel.", user->nick.c_str(), cname, channel.c_str());
Channel::JoinUser(user, channel.c_str(), false, "", false, ServerInstance->Time());
return MOD_RES_DENY;
}
}
}
return MOD_RES_PASSTHRU;
}
virtual ~ModuleRedirect()
{
}
virtual Version GetVersion()
{
return Version("Provides channel mode +L (limit redirection)", VF_VENDOR);
}
};
MODULE_INIT(ModuleRedirect)
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