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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) 2005 Craig Edwards <craigedwards@brainbox.cc>
*
* 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: Implements config tags which allow blocking of joins to channels */
class ModuleDenyChannels : public Module
{
public:
void init()
{
Implementation eventlist[] = { I_OnUserPreJoin, I_OnRehash };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
}
virtual void OnRehash(User* user)
{
/* check for redirect validity and loops/chains */
ConfigTagList tags = ServerInstance->Config->ConfTags("badchan");
for (ConfigIter i = tags.first; i != tags.second; ++i)
{
std::string name = i->second->getString("name");
std::string redirect = i->second->getString("redirect");
if (!redirect.empty())
{
if (!ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
{
if (user)
user->WriteServ("NOTICE %s :Invalid badchan redirect '%s'", user->nick.c_str(), redirect.c_str());
throw ModuleException("Invalid badchan redirect, not a channel");
}
for (ConfigIter j = tags.first; j != tags.second; ++j)
{
if (InspIRCd::Match(redirect, j->second->getString("name")))
{
bool goodchan = false;
ConfigTagList goodchans = ServerInstance->Config->ConfTags("badchan");
for (ConfigIter k = goodchans.first; k != goodchans.second; ++k)
{
if (InspIRCd::Match(redirect, k->second->getString("name")))
goodchan = true;
}
if (!goodchan)
{
/* <badchan:redirect> is a badchan */
if (user)
user->WriteServ("NOTICE %s :Badchan %s redirects to badchan %s", user->nick.c_str(), name.c_str(), redirect.c_str());
throw ModuleException("Badchan redirect loop");
}
}
}
}
}
}
virtual Version GetVersion()
{
return Version("Implements config tags which allow blocking of joins to channels", VF_VENDOR);
}
ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven)
{
ConfigTagList tags = ServerInstance->Config->ConfTags("badchan");
for (ConfigIter j = tags.first; j != tags.second; ++j)
{
if (InspIRCd::Match(cname, j->second->getString("name")))
{
if (user->IsOper() && j->second->getBool("allowopers"))
{
return MOD_RES_PASSTHRU;
}
else
{
std::string reason = j->second->getString("reason");
std::string redirect = j->second->getString("redirect");
ConfigTagList goodchans = ServerInstance->Config->ConfTags("goodchan");
for (ConfigIter i = goodchans.first; i != goodchans.second; ++i)
{
if (InspIRCd::Match(cname, i->second->getString("name")))
{
return MOD_RES_PASSTHRU;
}
}
if (ServerInstance->IsChannel(redirect.c_str(), ServerInstance->Config->Limits.ChanMax))
{
/* simple way to avoid potential loops: don't redirect to +L channels */
Channel *newchan = ServerInstance->FindChan(redirect);
if ((!newchan) || (!(newchan->IsModeSet('L'))))
{
user->WriteNumeric(926, "%s %s :Channel %s is forbidden, redirecting to %s: %s",user->nick.c_str(),cname.c_str(),cname.c_str(),redirect.c_str(), reason.c_str());
Channel::JoinUser(user, redirect, false, "", false, ServerInstance->Time());
return MOD_RES_DENY;
}
}
user->WriteNumeric(926, "%s %s :Channel %s is forbidden: %s",user->nick.c_str(),cname.c_str(),cname.c_str(),reason.c_str());
return MOD_RES_DENY;
}
}
}
return MOD_RES_PASSTHRU;
}
};
MODULE_INIT(ModuleDenyChannels)
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