/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2020 iwalkalone * Copyright (C) 2019 Matt Schatz * Copyright (C) 2018 linuxdaemon * Copyright (C) 2017 Dylan Frank * Copyright (C) 2013, 2017, 2019-2023, 2025 Sadie Powell * Copyright (C) 2012-2016 Attila Molnar * Copyright (C) 2012 Robby * Copyright (C) 2009-2010 Daniel De Graaf * Copyright (C) 2009 John Brooks * Copyright (C) 2008 Robin Burchell * Copyright (C) 2005, 2007 Craig Edwards * * 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 . */ #include "inspircd.h" #include "listmode.h" #include "modules/extban.h" #include "numerichelper.h" #include "timeutils.h" // Holds a timed ban class TimedBan final { public: std::string mask; std::string setter; time_t expire; Channel* chan; }; typedef std::vector timedbans; timedbans TimedBanList; class CommandTban final : public Command { private: ChanModeReference banmode; ExtBan::ManagerRef extbanmgr; bool IsBanSet(Channel* chan, const std::string& mask) { ListModeBase* banlm = static_cast(*banmode); if (!banlm) return false; const ListModeBase::ModeList* bans = banlm->GetList(chan); if (bans) { for (const auto& ban : *bans) { if (banlm->CompareEntry(ban.mask, mask)) return true; } } return false; } public: bool sendnotice; CommandTban(Module* Creator) : Command(Creator, "TBAN", 3) , banmode(Creator, "ban") , extbanmgr(Creator) { syntax = { " " }; } CmdResult Handle(User* user, const Params& parameters) override { auto* channel = ServerInstance->Channels.Find(parameters[0]); if (!channel) { user->WriteNumeric(Numerics::NoSuchChannel(parameters[0])); return CmdResult::FAILURE; } ModeHandler::Rank cm = channel->GetPrefixValue(user); if (cm < HALFOP_VALUE) { user->WriteNumeric(Numerics::ChannelPrivilegesNeeded(channel, HALFOP_VALUE, "set timed bans")); return CmdResult::FAILURE; } TimedBan T; unsigned long duration; if (!Duration::TryFrom(parameters[1], duration)) { user->WriteNotice("Invalid ban time"); return CmdResult::FAILURE; } unsigned long expire = duration + ServerInstance->Time(); std::string mask = parameters[2]; if (!extbanmgr || !extbanmgr->Canonicalize(mask)) ModeParser::CleanMask(mask); if (IsBanSet(channel, mask)) { user->WriteNotice("Ban already set"); return CmdResult::FAILURE; } Modes::ChangeList setban; setban.push_add(*banmode, mask); // Pass the user (instead of ServerInstance->FakeClient) to ModeHandler::Process() to // make it so that the user sets the mode themselves ServerInstance->Modes.Process(user, channel, nullptr, setban); if (ServerInstance->Modes.GetLastChangeList().empty()) { user->WriteNotice("Invalid ban mask"); return CmdResult::FAILURE; } // Attempt to find the actual set ban mask. for (const auto& mc : ServerInstance->Modes.GetLastChangeList().getlist()) { if (mc.mh == *banmode) { // We found the actual mask. mask = mc.param; break; } } T.mask = mask; T.setter = user->nick; T.expire = expire + (IS_REMOTE(user) ? 5 : 0); T.chan = channel; TimedBanList.push_back(T); if (sendnotice) { const std::string message = INSP_FORMAT("Timed ban {} added by {} on {} lasting for {}.", mask, user->nick, channel->name, Duration::ToLongString(duration)); // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above PrefixMode* mh = ServerInstance->Modes.FindNearestPrefixMode(HALFOP_VALUE); char pfxchar = mh ? mh->GetPrefix() : '@'; channel->WriteRemoteNotice(message, pfxchar); } return CmdResult::SUCCESS; } RouteDescriptor GetRouting(User* user, const Params& parameters) override { return ROUTE_BROADCAST; } }; class BanWatcher final : public ModeWatcher { public: BanWatcher(Module* parent) : ModeWatcher(parent, "ban", MODETYPE_CHANNEL) { } void AfterMode(User* source, User* dest, Channel* chan, const Modes::Change& change) override { if (change.adding) return; for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); ++i) { if (i->chan != chan) continue; const std::string& target = i->mask; if (irc::equals(change.param, target)) { TimedBanList.erase(i); break; } } } }; class ChannelMatcher final { Channel* const chan; public: ChannelMatcher(Channel* ch) : chan(ch) { } bool operator()(const TimedBan& tb) const { return (tb.chan == chan); } }; class ModuleTimedBans final : public Module { private: ChanModeReference banmode; CommandTban cmd; BanWatcher banwatcher; public: ModuleTimedBans() : Module(VF_VENDOR | VF_COMMON, "Adds the /TBAN command which allows channel operators to add bans which will be expired after the specified period.") , banmode(this, "ban") , cmd(this) , banwatcher(this) { } void ReadConfig(ConfigStatus& status) override { const auto& tag = ServerInstance->Config->ConfValue("timedbans"); cmd.sendnotice = tag->getBool("sendnotice", true); } void OnBackgroundTimer(time_t curtime) override { timedbans expired; for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();) { if (curtime > i->expire) { expired.push_back(*i); i = TimedBanList.erase(i); } else ++i; } for (const auto& timedban : expired) { if (cmd.sendnotice) { const std::string message = INSP_FORMAT("Timed ban {} set by {} on {} has expired.", timedban.mask, timedban.setter, timedban.chan->name); // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above PrefixMode* mh = ServerInstance->Modes.FindNearestPrefixMode(HALFOP_VALUE); char pfxchar = mh ? mh->GetPrefix() : '@'; timedban.chan->WriteRemoteNotice(message, pfxchar); } Modes::ChangeList setban; setban.push_remove(*banmode, timedban.mask); ServerInstance->Modes.Process(ServerInstance->FakeClient, timedban.chan, nullptr, setban); } } void OnChannelDelete(Channel* chan) override { // Remove all timed bans affecting the channel from internal bookkeeping TimedBanList.erase(std::remove_if(TimedBanList.begin(), TimedBanList.end(), ChannelMatcher(chan)), TimedBanList.end()); } }; MODULE_INIT(ModuleTimedBans)