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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
* Copyright (C) 2013, 2017-2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2012-2014, 2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012, 2018 Robby <robby@chatbelgie.be>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006, 2008-2010 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 "listmode.h"
#include "modules/exemption.h"
enum
{
// InspIRCd-specific.
RPL_ENDOFSPAMFILTER = 940,
RPL_SPAMFILTER = 941
};
class ChanFilter : public ListModeBase
{
public:
unsigned long maxlen;
ChanFilter(Module* Creator)
: ListModeBase(Creator, "filter", 'g', "End of channel spamfilter list", RPL_SPAMFILTER, RPL_ENDOFSPAMFILTER, false)
{
syntax = "<pattern>";
}
bool ValidateParam(User* user, Channel* chan, std::string& word) CXX11_OVERRIDE
{
if (word.length() > maxlen)
{
user->WriteNumeric(Numerics::InvalidModeParameter(chan, this, word, "Word is too long for the spamfilter list."));
return false;
}
return true;
}
};
class ModuleChanFilter : public Module
{
CheckExemption::EventProvider exemptionprov;
ChanFilter cf;
bool hidemask;
bool notifyuser;
ChanFilter::ListItem* Match(User* user, Channel* chan, const std::string& text)
{
ModResult res = CheckExemption::Call(exemptionprov, user, chan, "filter");
if (!IS_LOCAL(user) || res == MOD_RES_ALLOW)
return NULL;
ListModeBase::ModeList* list = cf.GetList(chan);
if (!list)
return NULL;
for (ListModeBase::ModeList::iterator i = list->begin(); i != list->end(); i++)
{
if (InspIRCd::Match(text, i->mask))
return &*i;
}
return NULL;
}
public:
ModuleChanFilter()
: exemptionprov(this)
, cf(this)
{
}
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
ConfigTag* tag = ServerInstance->Config->ConfValue("chanfilter");
hidemask = tag->getBool("hidemask");
cf.maxlen = tag->getUInt("maxlen", 35, 10, ModeParser::MODE_PARAM_MAX);
notifyuser = tag->getBool("notifyuser", true);
cf.DoRehash();
}
void OnUserPart(Membership* memb, std::string& partmessage, CUList& except_list) CXX11_OVERRIDE
{
if (!memb)
return;
User* user = memb->user;
Channel* chan = memb->chan;
ChanFilter::ListItem* match = Match(user, chan, partmessage);
if (!match)
return;
// Match() checks the user is local, we can assume from here
LocalUser* luser = IS_LOCAL(user);
std::string oldreason(partmessage);
partmessage = "Reason filtered";
if (!notifyuser)
{
// Send fake part
ClientProtocol::Messages::Part partmsg(memb, oldreason);
ClientProtocol::Event ev(ServerInstance->GetRFCEvents().part, partmsg);
luser->Send(ev);
// Don't send the user the changed message
except_list.insert(user);
return;
}
if (hidemask)
user->WriteNumeric(Numerics::CannotSendTo(chan, "Your part message contained a banned phrase and was blocked."));
else
user->WriteNumeric(Numerics::CannotSendTo(chan, InspIRCd::Format("Your part message contained a banned phrase (%s) and was blocked.",
match->mask.c_str())));
}
ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
{
if (target.type != MessageTarget::TYPE_CHANNEL)
return MOD_RES_PASSTHRU;
Channel* chan = target.Get<Channel>();
ChanFilter::ListItem* match = Match(user, chan, details.text);
if (match)
{
if (!notifyuser)
{
details.echo_original = true;
return MOD_RES_DENY;
}
if (hidemask)
user->WriteNumeric(Numerics::CannotSendTo(chan, "Your message to this channel contained a banned phrase and was blocked."));
else
user->WriteNumeric(Numerics::CannotSendTo(chan, InspIRCd::Format("Your message to this channel contained a banned phrase (%s) and was blocked.",
match->mask.c_str())));
return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
Version GetVersion() CXX11_OVERRIDE
{
// We don't send any link data if the length is 35 for compatibility with the 2.0 branch.
std::string maxfilterlen;
if (cf.maxlen != 35)
maxfilterlen.assign(ConvToStr(cf.maxlen));
return Version("Provides channel-specific censor lists (like mode +G but varies from channel to channel)", VF_VENDOR, maxfilterlen);
}
};
MODULE_INIT(ModuleChanFilter)
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