/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2020 iwalkalone * Copyright (C) 2019 Matt Schatz * Copyright (C) 2018 linuxdaemon * Copyright (C) 2017 B00mX0r * Copyright (C) 2013, 2017-2018, 2020 Sadie Powell * Copyright (C) 2013 Daniel Vassdal * Copyright (C) 2012-2016 Attila Molnar * Copyright (C) 2012, 2019 Robby * Copyright (C) 2009-2010 Daniel De Graaf * Copyright (C) 2009 Uli Schlachter * Copyright (C) 2009 John Brooks * Copyright (C) 2007-2008 Robin Burchell * Copyright (C) 2007 Dennis Friis * Copyright (C) 2005-2008, 2010 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" // Holds a timed ban class TimedBan { public: std::string mask; std::string setter; time_t expire; Channel* chan; }; typedef std::vector timedbans; timedbans TimedBanList; // Handle /TBAN class CommandTban : public Command { ChanModeReference banmode; 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 (ListModeBase::ModeList::const_iterator i = bans->begin(); i != bans->end(); ++i) { const ListModeBase::ListItem& ban = *i; if (irc::equals(ban.mask, mask)) return true; } } return false; } public: bool sendnotice; CommandTban(Module* Creator) : Command(Creator,"TBAN", 3) , banmode(Creator, "ban") { syntax = " "; } CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE { Channel* channel = ServerInstance->FindChan(parameters[0]); if (!channel) { user->WriteNumeric(Numerics::NoSuchChannel(parameters[0])); return CMD_FAILURE; } unsigned int cm = channel->GetPrefixValue(user); if (cm < HALFOP_VALUE) { user->WriteNumeric(ERR_CHANOPRIVSNEEDED, channel->name, "You do not have permission to set bans on this channel"); return CMD_FAILURE; } TimedBan T; unsigned long duration; if (!InspIRCd::Duration(parameters[1], duration)) { user->WriteNotice("Invalid ban time"); return CMD_FAILURE; } unsigned long expire = duration + ServerInstance->Time(); std::string mask = parameters[2]; bool isextban = ((mask.size() > 2) && (mask[1] == ':')); if (!isextban && !InspIRCd::IsValidMask(mask)) mask.append("!*@*"); if (IsBanSet(channel, mask)) { user->WriteNotice("Ban already set"); return CMD_FAILURE; } Modes::ChangeList setban; setban.push_add(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), 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, NULL, setban); if (ServerInstance->Modes->GetLastChangeList().empty()) { user->WriteNotice("Invalid ban mask"); return CMD_FAILURE; } 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 = InspIRCd::Format("Timed ban %s added by %s on %s lasting for %s.", mask.c_str(), user->nick.c_str(), channel->name.c_str(), InspIRCd::DurationString(duration).c_str()); // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above PrefixMode* mh = ServerInstance->Modes->FindPrefixMode('h'); char pfxchar = (mh && mh->name == "halfop") ? mh->GetPrefix() : '@'; channel->WriteRemoteNotice(message, pfxchar); } return CMD_SUCCESS; } RouteDescriptor GetRouting(User* user, const Params& parameters) CXX11_OVERRIDE { return ROUTE_BROADCAST; } }; class BanWatcher : public ModeWatcher { public: BanWatcher(Module* parent) : ModeWatcher(parent, "ban", MODETYPE_CHANNEL) { } void AfterMode(User* source, User* dest, Channel* chan, const std::string& banmask, bool adding) CXX11_OVERRIDE { if (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(banmask, target)) { TimedBanList.erase(i); break; } } } }; class ChannelMatcher { Channel* const chan; public: ChannelMatcher(Channel* ch) : chan(ch) { } bool operator()(const TimedBan& tb) const { return (tb.chan == chan); } }; class ModuleTimedBans : public Module { CommandTban cmd; BanWatcher banwatcher; public: ModuleTimedBans() : cmd(this) , banwatcher(this) { } void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE { ConfigTag* tag = ServerInstance->Config->ConfValue("timedbans"); cmd.sendnotice = tag->getBool("sendnotice", true); } void OnBackgroundTimer(time_t curtime) CXX11_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 (timedbans::iterator i = expired.begin(); i != expired.end(); i++) { const std::string mask = i->mask; Channel* cr = i->chan; if (cmd.sendnotice) { const std::string message = InspIRCd::Format("Timed ban %s set by %s on %s has expired.", mask.c_str(), i->setter.c_str(), cr->name.c_str()); // If halfop is loaded, send notice to halfops and above, otherwise send to ops and above PrefixMode* mh = ServerInstance->Modes->FindPrefixMode('h'); char pfxchar = (mh && mh->name == "halfop") ? mh->GetPrefix() : '@'; cr->WriteRemoteNotice(message, pfxchar); } Modes::ChangeList setban; setban.push_remove(ServerInstance->Modes->FindMode('b', MODETYPE_CHANNEL), mask); ServerInstance->Modes->Process(ServerInstance->FakeClient, cr, NULL, setban); } } void OnChannelDelete(Channel* chan) CXX11_OVERRIDE { // Remove all timed bans affecting the channel from internal bookkeeping TimedBanList.erase(std::remove_if(TimedBanList.begin(), TimedBanList.end(), ChannelMatcher(chan)), TimedBanList.end()); } Version GetVersion() CXX11_OVERRIDE { return Version("Adds the /TBAN command which allows channel operators to add bans which will be expired after the specified period.", VF_COMMON | VF_VENDOR); } }; MODULE_INIT(ModuleTimedBans)