/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2013, 2017-2019 Sadie Powell * Copyright (C) 2012-2015, 2018 Attila Molnar * Copyright (C) 2012, 2019 Robby * Copyright (C) 2010 Jens Voss * Copyright (C) 2009 Matt Smith * Copyright (C) 2009 Daniel De Graaf * Copyright (C) 2008 Robin Burchell * Copyright (C) 2007-2008, 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 "modules/ctctags.h" #include "modules/names.h" class DelayJoinMode : public ModeHandler { private: LocalIntExt& unjoined; public: DelayJoinMode(Module* Parent, LocalIntExt& ext) : ModeHandler(Parent, "delayjoin", 'D', PARAM_NONE, MODETYPE_CHANNEL) , unjoined(ext) { ranktoset = ranktounset = OP_VALUE; } ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& parameter, bool adding) CXX11_OVERRIDE; void RevealUser(User* user, Channel* chan); }; namespace { /** Hook handler for join client protocol events. * This allows us to block join protocol events completely, including all associated messages (e.g. MODE, away-notify AWAY). * This is not the same as OnUserJoin() because that runs only when a real join happens but this runs also when a module * such as hostcycle generates a join. */ class JoinHook : public ClientProtocol::EventHook { const LocalIntExt& unjoined; public: JoinHook(Module* mod, const LocalIntExt& unjoinedref) : ClientProtocol::EventHook(mod, "JOIN", 10) , unjoined(unjoinedref) { } ModResult OnPreEventSend(LocalUser* user, const ClientProtocol::Event& ev, ClientProtocol::MessageList& messagelist) CXX11_OVERRIDE { const ClientProtocol::Events::Join& join = static_cast(ev); const Membership* const memb = join.GetMember(); const User* const u = memb->user; if ((unjoined.get(memb)) && (u != user)) return MOD_RES_DENY; return MOD_RES_PASSTHRU; } }; } class ModuleDelayJoin : public Module , public CTCTags::EventListener , public Names::EventListener { public: LocalIntExt unjoined; JoinHook joinhook; DelayJoinMode djm; ModuleDelayJoin() : CTCTags::EventListener(this) , Names::EventListener(this) , unjoined("delayjoin", ExtensionItem::EXT_MEMBERSHIP, this) , joinhook(this, unjoined) , djm(this, unjoined) { } Version GetVersion() CXX11_OVERRIDE; ModResult OnNamesListItem(LocalUser* issuer, Membership*, std::string& prefixes, std::string& nick) CXX11_OVERRIDE; void OnUserJoin(Membership*, bool, bool, CUList&) CXX11_OVERRIDE; void CleanUser(User* user); void OnUserPart(Membership*, std::string &partmessage, CUList&) CXX11_OVERRIDE; void OnUserKick(User* source, Membership*, const std::string &reason, CUList&) CXX11_OVERRIDE; void OnBuildNeighborList(User* source, IncludeChanList& include, std::map& exception) CXX11_OVERRIDE; void OnUserMessage(User* user, const MessageTarget& target, const MessageDetails& details) CXX11_OVERRIDE; void OnUserTagMessage(User* user, const MessageTarget& target, const CTCTags::TagMessageDetails& details) CXX11_OVERRIDE; ModResult OnRawMode(User* user, Channel* channel, ModeHandler* mh, const std::string& param, bool adding) CXX11_OVERRIDE; }; ModeAction DelayJoinMode::OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding) { /* no change */ if (channel->IsModeSet(this) == adding) return MODEACTION_DENY; if (!adding) { /* * Make all users visible, as +D is being removed. If we don't do this, * they remain permanently invisible on this channel! */ const Channel::MemberMap& users = channel->GetUsers(); for (Channel::MemberMap::const_iterator n = users.begin(); n != users.end(); ++n) RevealUser(n->first, channel); } channel->SetMode(this, adding); return MODEACTION_ALLOW; } Version ModuleDelayJoin::GetVersion() { return Version("Adds channel mode D (delayjoin) which hides JOIN messages from users until they speak.", VF_VENDOR); } ModResult ModuleDelayJoin::OnNamesListItem(LocalUser* issuer, Membership* memb, std::string& prefixes, std::string& nick) { /* don't prevent the user from seeing themself */ if (issuer == memb->user) return MOD_RES_PASSTHRU; /* If the user is hidden by delayed join, hide them from the NAMES list */ if (unjoined.get(memb)) return MOD_RES_DENY; return MOD_RES_PASSTHRU; } static void populate(CUList& except, Membership* memb) { const Channel::MemberMap& users = memb->chan->GetUsers(); for (Channel::MemberMap::const_iterator i = users.begin(); i != users.end(); ++i) { if (i->first == memb->user || !IS_LOCAL(i->first)) continue; except.insert(i->first); } } void ModuleDelayJoin::OnUserJoin(Membership* memb, bool sync, bool created, CUList& except) { if (memb->chan->IsModeSet(djm)) unjoined.set(memb, 1); } void ModuleDelayJoin::OnUserPart(Membership* memb, std::string &partmessage, CUList& except) { if (unjoined.set(memb, 0)) populate(except, memb); } void ModuleDelayJoin::OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& except) { if (unjoined.set(memb, 0)) populate(except, memb); } void ModuleDelayJoin::OnBuildNeighborList(User* source, IncludeChanList& include, std::map& exception) { for (IncludeChanList::iterator i = include.begin(); i != include.end(); ) { Membership* memb = *i; if (unjoined.get(memb)) i = include.erase(i); else ++i; } } void ModuleDelayJoin::OnUserTagMessage(User* user, const MessageTarget& target, const CTCTags::TagMessageDetails& details) { if (target.type != MessageTarget::TYPE_CHANNEL) return; Channel* channel = target.Get(); djm.RevealUser(user, channel); } void ModuleDelayJoin::OnUserMessage(User* user, const MessageTarget& target, const MessageDetails& details) { if (target.type != MessageTarget::TYPE_CHANNEL) return; Channel* channel = target.Get(); djm.RevealUser(user, channel); } void DelayJoinMode::RevealUser(User* user, Channel* chan) { Membership* memb = chan->GetUser(user); if (!memb || !unjoined.set(memb, 0)) return; /* Display the join to everyone else (the user who joined got it earlier) */ CUList except_list; except_list.insert(user); ClientProtocol::Events::Join joinevent(memb); chan->Write(joinevent, 0, except_list); } /* make the user visible if they receive any mode change */ ModResult ModuleDelayJoin::OnRawMode(User* user, Channel* channel, ModeHandler* mh, const std::string& param, bool adding) { if (!channel || param.empty()) return MOD_RES_PASSTHRU; // If not a prefix mode then we got nothing to do here if (!mh->IsPrefixMode()) return MOD_RES_PASSTHRU; User* dest; if (IS_LOCAL(user)) dest = ServerInstance->FindNickOnly(param); else dest = ServerInstance->FindNick(param); if (!dest) return MOD_RES_PASSTHRU; djm.RevealUser(dest, channel); return MOD_RES_PASSTHRU; } MODULE_INIT(ModuleDelayJoin)