/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2019 linuxdaemon * Copyright (C) 2018 systocrat * Copyright (C) 2018 Dylan Frank * Copyright (C) 2013, 2016-2022 Sadie Powell * Copyright (C) 2013 Daniel Vassdal * Copyright (C) 2013 ChrisTX * Copyright (C) 2013 Adam * Copyright (C) 2012-2016, 2018 Attila Molnar * Copyright (C) 2012, 2019 Robby * Copyright (C) 2012 DjSlash * Copyright (C) 2011 jackmcbarn * Copyright (C) 2009-2010 Daniel De Graaf * Copyright (C) 2008 Thomas Stagner * Copyright (C) 2008 John Brooks * Copyright (C) 2007, 2009 Dennis Friis * Copyright (C) 2006-2009 Robin Burchell * Copyright (C) 2004, 2006-2009 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 "clientprotocolevent.h" #include "xline.h" enum { // From RFC 1459. ERR_NICKNAMEINUSE = 433, // From ircu. RPL_YOURDISPLAYEDHOST = 396, }; ClientProtocol::MessageList LocalUser::sendmsglist; bool User::IsNoticeMaskSet(unsigned char sm) const { if (!SnomaskManager::IsSnomask(sm)) return false; return (snomasks[sm-65]); } bool User::IsModeSet(unsigned char m) const { ModeHandler* mh = ServerInstance->Modes.FindMode(m, MODETYPE_USER); return (mh && modes[mh->GetId()]); } std::string User::GetModeLetters(bool includeparams) const { std::string ret(1, '+'); std::string params; for (const auto& [_, mh] : ServerInstance->Modes.GetModes(MODETYPE_USER)) { if (!IsModeSet(mh)) continue; ret.push_back(mh->GetModeChar()); if ((includeparams) && (mh->NeedsParam(true))) { const std::string val = mh->GetUserParameter(this); if (!val.empty()) params.append(1, ' ').append(val); } } ret += params; return ret; } User::User(const std::string& uid, Server* srv, Type type) : Extensible(ExtensionType::USER) , nickchanged(ServerInstance->Time()) , uuid(uid) , server(srv) , connected(CONN_NONE) , quitting(false) , uniqueusername(false) , usertype(type) { ServerInstance->Logs.Debug("USERS", "New UUID for user: %s", uuid.c_str()); if (srv->IsService()) ServerInstance->Users.all_services.push_back(this); // Do not insert FakeUsers into the uuidlist so FindUUID() won't return them which is the desired behavior if (type != User::TYPE_SERVER) { if (!ServerInstance->Users.uuidlist.emplace(uuid, this).second) throw CoreException("Duplicate UUID in User constructor: " + uuid); } } LocalUser::LocalUser(int myfd, const irc::sockets::sockaddrs& clientsa, const irc::sockets::sockaddrs& serversa) : User(ServerInstance->UIDGen.GetUID(), ServerInstance->FakeClient->server, User::TYPE_LOCAL) , eh(this) , server_sa(serversa) , quitting_sendq(false) , lastping(true) , exempt(false) { signon = ServerInstance->Time(); // The user's default nick is their UUID nick = uuid; ident = uuid; eh.SetFd(myfd); memcpy(&client_sa, &clientsa, sizeof(irc::sockets::sockaddrs)); ChangeRealHost(GetIPString(), true); } const std::string& User::MakeHost() { if (!this->cached_makehost.empty()) return this->cached_makehost; this->cached_makehost = ident + "@" + GetRealHost(); return this->cached_makehost; } const std::string& User::MakeHostIP() { if (!this->cached_hostip.empty()) return this->cached_hostip; this->cached_hostip = ident + "@" + this->GetIPString(); return this->cached_hostip; } const std::string& User::GetFullHost() { if (!this->cached_fullhost.empty()) return this->cached_fullhost; this->cached_fullhost = nick + "!" + ident + "@" + GetDisplayedHost(); return this->cached_fullhost; } const std::string& User::GetFullRealHost() { if (!this->cached_fullrealhost.empty()) return this->cached_fullrealhost; this->cached_fullrealhost = nick + "!" + ident + "@" + GetRealHost(); return this->cached_fullrealhost; } void UserIOHandler::OnDataReady() { if (user->quitting) return; if (recvq.length() > user->GetClass()->recvqmax && !user->HasPrivPermission("users/flood/increased-buffers")) { ServerInstance->Users.QuitUser(user, "RecvQ exceeded"); ServerInstance->SNO.WriteToSnoMask('a', "User %s RecvQ of %zu exceeds connect class maximum of %lu", user->nick.c_str(), recvq.length(), user->GetClass()->recvqmax); return; } unsigned long sendqmax = ULONG_MAX; if (!user->HasPrivPermission("users/flood/increased-buffers")) sendqmax = user->GetClass()->softsendqmax; unsigned long penaltymax = ULONG_MAX; if (!user->HasPrivPermission("users/flood/no-fakelag")) penaltymax = user->GetClass()->penaltythreshold * 1000; // The cleaned message sent by the user or empty if not found yet. std::string line; // The position of the most \n character or npos if not found yet. std::string::size_type eolpos; // The position within the recvq of the current character. std::string::size_type qpos; while (user->CommandFloodPenalty < penaltymax && GetSendQSize() < sendqmax) { // Check the newly received data for an EOL. eolpos = recvq.find('\n', checked_until); if (eolpos == std::string::npos) { checked_until = recvq.length(); return; } // We've found a line! Clean it up and move it to the line buffer. line.reserve(eolpos); for (qpos = 0; qpos < eolpos; ++qpos) { char c = recvq[qpos]; switch (c) { case '\0': c = ' '; break; case '\r': continue; } line.push_back(c); } // just found a newline. Terminate the string, and pull it out of recvq recvq.erase(0, eolpos + 1); checked_until = 0; // TODO should this be moved to when it was inserted in recvq? ServerInstance->stats.Recv += qpos; user->bytes_in += qpos; user->cmds_in++; ServerInstance->Parser.ProcessBuffer(user, line); if (user->quitting) return; // clear() does not reclaim memory associated with the string, so our .reserve() call is safe line.clear(); } if (user->CommandFloodPenalty >= penaltymax && !user->GetClass()->fakelag) ServerInstance->Users.QuitUser(user, "Excess Flood"); } void UserIOHandler::AddWriteBuf(const std::string& data) { if (user->quitting_sendq) return; if (!user->quitting && GetSendQSize() + data.length() > user->GetClass()->hardsendqmax && !user->HasPrivPermission("users/flood/increased-buffers")) { user->quitting_sendq = true; ServerInstance->GlobalCulls.AddSQItem(user); return; } // We still want to append data to the sendq of a quitting user, // e.g. their ERROR message that says 'closing link' WriteData(data); } bool UserIOHandler::OnChangeLocalSocketAddress(const irc::sockets::sockaddrs& sa) { memcpy(&user->server_sa, &sa, sizeof(irc::sockets::sockaddrs)); return true; } bool UserIOHandler::OnChangeRemoteSocketAddress(const irc::sockets::sockaddrs& sa) { user->ChangeRemoteAddress(sa); return !user->quitting; } void UserIOHandler::OnError(BufferedSocketError sockerr) { ServerInstance->Users.QuitUser(user, GetError()); } Cullable::Result User::Cull() { if (!quitting) ServerInstance->Users.QuitUser(this, "Culled without QuitUser"); if (client_sa.family() != AF_UNSPEC) ServerInstance->Users.RemoveCloneCounts(this); if (server->IsService()) stdalgo::erase(ServerInstance->Users.all_services, this); return Extensible::Cull(); } Cullable::Result LocalUser::Cull() { eh.Cull(); return User::Cull(); } Cullable::Result FakeUser::Cull() { // Fake users don't quit, they just get culled. quitting = true; // Fake users are not inserted into UserManager::clientlist or uuidlist, so we don't need to modify those here return User::Cull(); } bool User::OperLogin(const std::shared_ptr& account, bool automatic, bool force) { LocalUser* luser = IS_LOCAL(this); if (luser && !quitting && !force) { ModResult modres; FIRST_MOD_RESULT(OnPreOperLogin, modres, (luser, account, automatic)); if (modres == MOD_RES_DENY) return false; // Module rejected the oper attempt. } // If this user is already logged in to an oper account then log them out. if (IsOper()) OperLogout(); FOREACH_MOD(OnOperLogin, (this, account, automatic)); // When a user logs in we need to: // 1. Set the operator account (this is what IsOper checks). // 2. Set user mode o (oper) *WITHOUT* calling the mode handler. // 3. Add the user to the operator list. oper = account; auto opermh = ServerInstance->Modes.FindMode('o', MODETYPE_USER); if (opermh) { SetMode(opermh, true); if (luser) { Modes::ChangeList changelist; changelist.push_add(opermh); ClientProtocol::Events::Mode modemsg(ServerInstance->FakeClient, nullptr, luser, changelist); luser->Send(modemsg); } } ServerInstance->Users.all_opers.push_back(this); FOREACH_MOD(OnPostOperLogin, (this, automatic)); return true; } void User::OperLogout() { if (!IsOper()) return; FOREACH_MOD(OnOperLogout, (this)); // When a user logs OUT we need to: // 1. Unset the operator account (this is what IsOper checks). // 2. Unset user mode o (oper) *WITHOUT* calling the mode handler. // 3. Remove the user from the operator list. auto account = oper; oper = nullptr; // If the user is quitting we shouldn't remove any modes as it results in // mode messages being broadcast across the network. if (!quitting) { // Remove any oper-only modes from the user. Modes::ChangeList changelist; for (const auto& [_, mh] : ServerInstance->Modes.GetModes(MODETYPE_USER)) { if (mh->NeedsOper() && IsModeSet(mh)) changelist.push_remove(mh); } ServerInstance->Modes.Process(this, nullptr, this, changelist); auto opermh = ServerInstance->Modes.FindMode('o', MODETYPE_USER); if (opermh) SetMode(opermh, false); } stdalgo::vector::swaperase(ServerInstance->Users.all_opers, this); FOREACH_MOD(OnPostOperLogout, (this, account)); } bool LocalUser::CheckLines(bool doZline) { const char* check[] = { "G" , "K", (doZline) ? "Z" : nullptr, nullptr }; if (!this->exempt) { for (int n = 0; check[n]; ++n) { XLine* r = ServerInstance->XLines->MatchesLine(check[n], this); if (r) { r->Apply(this); return true; } } } return false; } void LocalUser::FullConnect() { ServerInstance->stats.Connects++; this->idle_lastmsg = ServerInstance->Time(); /* * You may be thinking "wtf, we checked this in User::AddClient!" - and yes, we did, BUT. * At the time AddClient is called, we don't have a resolved host, by here we probably do - which * may put the user into a totally separate class with different restrictions! so we *must* check again. * Don't remove this! -- w00t */ if (!FindConnectClass()) return; // User does not match any connect classes. CheckLines(); if (quitting) return; /* * We don't set CONN_FULL until triggering OnUserConnect, so some module events don't spew out stuff * for a user that doesn't exist yet. */ FOREACH_MOD(OnUserConnect, (this)); // The user is now fully connected. if (ServerInstance->Users.unknown_count) ServerInstance->Users.unknown_count--; this->connected = CONN_FULL; FOREACH_MOD(OnPostConnect, (this)); ServerInstance->SNO.WriteToSnoMask('c', "Client connecting on port %hu (class %s): %s (%s) [%s\x0F]", this->server_sa.port(), this->GetClass()->name.c_str(), GetFullRealHost().c_str(), this->GetIPString().c_str(), this->GetRealName().c_str()); ServerInstance->Logs.Debug("BANCACHE", "BanCache: Adding NEGATIVE hit for " + this->GetIPString()); ServerInstance->BanCache.AddHit(this->GetIPString(), "", ""); // reset the flood penalty (which could have been raised due to things like auto +x) CommandFloodPenalty = 0; } void User::InvalidateCache() { /* Invalidate cache */ cachedip.clear(); cached_fullhost.clear(); cached_hostip.clear(); cached_makehost.clear(); cached_fullrealhost.clear(); } bool User::ChangeNick(const std::string& newnick, time_t newts) { if (quitting) { ServerInstance->Logs.Debug("USERS", "ERROR: Attempted to change nick of a quitting user: " + this->nick); return false; } User* const InUse = ServerInstance->Users.FindNick(newnick); if (InUse == this) { // case change, don't need to check campers // and, if it's identical including case, we can leave right now // We also don't update the nick TS if it's a case change, either if (newnick == nick) return true; } else { /* * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) -- * then we have a potential collide. Check whether someone else is camping on the nick * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the * camper to their UID, and allow the incoming nick change. * * If the guy using the nick is already using it, tell the incoming nick change to gtfo, * because the nick is already (rightfully) in use. -- w00t */ if (InUse) { if (!InUse->IsFullyConnected()) { /* force the camper to their UUID, and ask them to re-send a NICK. */ LocalUser* const localuser = static_cast(InUse); localuser->OverruleNick(); } else { /* No camping, tell the incoming user to stop trying to change nick ;p */ this->WriteNumeric(ERR_NICKNAMEINUSE, newnick, "Nickname is already in use."); return false; } } nickchanged = newts ? newts : ServerInstance->Time(); } if (IsFullyConnected()) { ClientProtocol::Messages::Nick nickmsg(this, newnick); ClientProtocol::Event nickevent(ServerInstance->GetRFCEvents().nick, nickmsg); this->WriteCommonRaw(nickevent, true); } const std::string oldnick = nick; nick = newnick; InvalidateCache(); ServerInstance->Users.clientlist.erase(oldnick); ServerInstance->Users.clientlist[newnick] = this; if (IsFullyConnected()) FOREACH_MOD(OnUserPostNick, (this, oldnick)); return true; } void LocalUser::OverruleNick() { { ClientProtocol::Messages::Nick nickmsg(this, this->uuid); this->Send(ServerInstance->GetRFCEvents().nick, nickmsg); } this->WriteNumeric(ERR_NICKNAMEINUSE, this->nick, "Nickname overruled."); // Clear the bit before calling ChangeNick() to make it NOT run the OnUserPostNick() hook this->connected &= ~CONN_NICK; this->ChangeNick(this->uuid); } const std::string& User::GetIPString() { if (cachedip.empty()) { cachedip = client_sa.addr(); /* IP addresses starting with a : on irc are a Bad Thing (tm) */ if (cachedip[0] == ':') cachedip.insert(cachedip.begin(), 1, '0'); } return cachedip; } const std::string& User::GetBanIdent() const { static const std::string wildcard = "*"; return uniqueusername ? ident : wildcard; } const std::string& User::GetHost(bool uncloak) const { return uncloak ? GetRealHost() : GetDisplayedHost(); } const std::string& User::GetDisplayedHost() const { return displayhost.empty() ? realhost : displayhost; } const std::string& User::GetRealHost() const { return realhost; } const std::string& User::GetRealName() const { return realname; } irc::sockets::cidr_mask User::GetCIDRMask() const { unsigned char range = 0; switch (client_sa.family()) { case AF_INET6: range = ServerInstance->Config->c_ipv6_range; break; case AF_INET: range = ServerInstance->Config->c_ipv4_range; break; } return irc::sockets::cidr_mask(client_sa, range); } void User::ChangeRemoteAddress(const irc::sockets::sockaddrs& sa) { const std::string oldip(client_sa.family() == AF_UNSPEC ? "" : GetIPString()); memcpy(&client_sa, &sa, sizeof(irc::sockets::sockaddrs)); this->InvalidateCache(); // If the users hostname was their IP then update it. if (GetRealHost() == oldip) ChangeRealHost(GetIPString(), false); if (GetDisplayedHost() == oldip) ChangeDisplayedHost(GetIPString()); } void LocalUser::ChangeRemoteAddress(const irc::sockets::sockaddrs& sa) { if (sa == client_sa) return; ServerInstance->Users.RemoveCloneCounts(this); User::ChangeRemoteAddress(sa); ServerInstance->Users.AddClone(this); // Recheck the connect class. if (FindConnectClass()) FOREACH_MOD(OnChangeRemoteAddress, (this)); } bool LocalUser::FindConnectClass() { ServerInstance->Logs.Debug("CONNECTCLASS", "Finding a connect class for %s (%s) ...", uuid.c_str(), GetFullRealHost().c_str()); for (const auto& klass : ServerInstance->Config->Classes) { ServerInstance->Logs.Debug("CONNECTCLASS", "Checking the %s connect class ...", klass->GetName().c_str()); // Users can not be automatically assigned to a named class. if (klass->type == ConnectClass::NAMED) { ServerInstance->Logs.Debug("CONNECTCLASS", "The %s connect class is not suitable as neither nor are set.", klass->GetName().c_str()); continue; } ModResult modres; FIRST_MOD_RESULT(OnPreChangeConnectClass, modres, (this, klass)); if (modres != MOD_RES_DENY) { ServerInstance->Logs.Debug("CONNECTCLASS", "The %s connect class is suitable for %s (%s).", klass->GetName().c_str(), uuid.c_str(), GetFullRealHost().c_str()); ChangeConnectClass(klass, false); return !quitting; } } // The user didn't match any connect classes. if (connectclass) { connectclass->use_count--; connectclass = nullptr; } ServerInstance->Users.QuitUser(this, "You are not allowed to connect to this server"); return false; } void LocalUser::ChangeConnectClass(const std::shared_ptr& klass, bool force) { // Let modules know the class is about to be changed. FOREACH_MOD(OnChangeConnectClass, (this, klass, force)); if (quitting) return; // User hit some kind of restriction. // Assign the new connect class. if (connectclass) connectclass->use_count--; connectclass = klass; connectclass->use_count++; // Update the core user data that depends on connect class. nextping = ServerInstance->Time() + klass->pingtime; uniqueusername = klass->uniqueusername; // Let modules know the class has been changed. FOREACH_MOD(OnPostChangeConnectClass, (this, force)); } void LocalUser::Write(const ClientProtocol::SerializedMessage& text) { if (!eh.HasFd()) return; if (ServerInstance->Config->RawLog) { if (text.empty()) return; std::string::size_type nlpos = text.find_first_of("\r\n", 0, 2); if (nlpos == std::string::npos) nlpos = text.length(); // TODO is this ok, test it ServerInstance->Logs.RawIO("USEROUTPUT", "C[%s] O %.*s", uuid.c_str(), static_cast(nlpos), text.c_str()); } eh.AddWriteBuf(text); const size_t bytessent = text.length() + 2; ServerInstance->stats.Sent += bytessent; this->bytes_out += bytessent; this->cmds_out++; } void LocalUser::Send(ClientProtocol::Event& protoev) { if (!serializer) { ServerInstance->Logs.Debug("USERS", "BUG: LocalUser::Send() called on %s who does not have a serializer!", GetFullRealHost().c_str()); return; } // In the most common case a static LocalUser field, sendmsglist, is passed to the event to be // populated. The list is cleared before returning. // To handle re-enters, if sendmsglist is non-empty upon entering the method then a temporary // list is used instead of the static one. if (sendmsglist.empty()) { Send(protoev, sendmsglist); sendmsglist.clear(); } else { ClientProtocol::MessageList msglist; Send(protoev, msglist); } } void LocalUser::Send(ClientProtocol::Event& protoev, ClientProtocol::MessageList& msglist) { // Modules can personalize the messages sent per user for the event protoev.GetMessagesForUser(this, msglist); for (const auto& msg : msglist) { ClientProtocol::Message& curr = *msg; ModResult res; FIRST_MOD_RESULT(OnUserWrite, res, (this, curr)); if (res != MOD_RES_DENY) Write(serializer->SerializeForUser(this, curr)); } } void User::WriteNumeric(const Numeric::Numeric& numeric) { LocalUser* const localuser = IS_LOCAL(this); if (!localuser) return; ModResult MOD_RESULT; FIRST_MOD_RESULT(OnNumeric, MOD_RESULT, (this, numeric)); if (MOD_RESULT == MOD_RES_DENY) return; ClientProtocol::Messages::Numeric numericmsg(numeric, localuser); localuser->Send(ServerInstance->GetRFCEvents().numeric, numericmsg); } void User::WriteRemoteNotice(const std::string& text) { ServerInstance->PI->SendMessage(this, text, MSG_NOTICE); } void LocalUser::WriteRemoteNotice(const std::string& text) { WriteNotice(text); } namespace { class WriteCommonRawHandler final : public User::ForEachNeighborHandler { ClientProtocol::Event& ev; void Execute(LocalUser* user) override { user->Send(ev); } public: WriteCommonRawHandler(ClientProtocol::Event& protoev) : ev(protoev) { } }; } void User::WriteCommonRaw(ClientProtocol::Event& protoev, bool include_self) { WriteCommonRawHandler handler(protoev); ForEachNeighbor(handler, include_self); } uint64_t User::ForEachNeighbor(ForEachNeighborHandler& handler, bool include_self) { // The basic logic for visiting the neighbors of a user is to iterate the channel list of the user // and visit all users on those channels. Because two users may share more than one common channel, // we must skip users that we have already visited. // To do this, we make use of a global counter and an integral 'already_sent' field in LocalUser. // The global counter is incremented every time we do something for each neighbor of a user. Then, // before visiting a member we examine user->already_sent. If it's equal to the current counter, we // skip the member. Otherwise, we set it to the current counter and visit the member. // Ask modules to build a list of exceptions. // Mods may also exclude entire channels by erasing them from include_chans. User::NeighborList include_chans(chans.begin(), chans.end()); User::NeighborExceptions exceptions; exceptions[this] = include_self; FOREACH_MOD(OnBuildNeighborList, (this, include_chans, exceptions)); // Get next id, guaranteed to differ from the already_sent field of all users const uint64_t newid = ServerInstance->Users.NextAlreadySentId(); // Handle exceptions first for (NeighborExceptions::const_iterator i = exceptions.begin(); i != exceptions.end(); ++i) { LocalUser* curr = IS_LOCAL(i->first); if (curr) { // Mark as visited to ensure we won't visit again if there is a common channel curr->already_sent = newid; // Always treat quitting users as excluded if ((i->second) && (!curr->quitting)) handler.Execute(curr); } } // Now consider the real neighbors for (const auto* memb : include_chans) { for (const auto& [user, _] : memb->chan->GetUsers()) { LocalUser* curr = IS_LOCAL(user); // User not yet visited? if ((curr) && (curr->already_sent != newid)) { // Mark as visited and execute function curr->already_sent = newid; handler.Execute(curr); } } } return newid; } void User::WriteRemoteNumeric(const Numeric::Numeric& numeric) { WriteNumeric(numeric); } /* return 0 or 1 depending if users u and u2 share one or more common channels * (used by QUIT, NICK etc which arent channel specific notices) * * The old algorithm in 1.0 for this was relatively inefficient, iterating over * the first users channels then the second users channels within the outer loop, * therefore it was a maximum of x*y iterations (upon returning 0 and checking * all possible iterations). However this new function instead checks against the * channel's userlist in the inner loop which is a std::map * and saves us time as we already know what pointer value we are after. * Don't quote me on the maths as i am not a mathematician or computer scientist, * but i believe this algorithm is now x+(log y) maximum iterations instead. */ bool User::SharesChannelWith(User* other) const { for (const auto* memb : chans) { if (memb->chan->HasUser(other)) return true; } return false; } bool User::ChangeRealName(const std::string& real) { if (!this->realname.compare(real)) return true; if (IS_LOCAL(this)) { ModResult MOD_RESULT; FIRST_MOD_RESULT(OnPreChangeRealName, MOD_RESULT, (IS_LOCAL(this), real)); if (MOD_RESULT == MOD_RES_DENY) return false; } FOREACH_MOD(OnChangeRealName, (this, real)); this->realname.assign(real, 0, ServerInstance->Config->Limits.MaxReal); return true; } bool User::ChangeDisplayedHost(const std::string& shost) { if (GetDisplayedHost() == shost) return true; LocalUser* luser = IS_LOCAL(this); if (luser) { ModResult MOD_RESULT; FIRST_MOD_RESULT(OnPreChangeHost, MOD_RESULT, (luser, shost)); if (MOD_RESULT == MOD_RES_DENY) return false; } FOREACH_MOD(OnChangeHost, (this, shost)); if (realhost == shost) this->displayhost.clear(); else this->displayhost.assign(shost, 0, ServerInstance->Config->Limits.MaxHost); this->InvalidateCache(); if (IS_LOCAL(this) && connected != User::CONN_NONE) this->WriteNumeric(RPL_YOURDISPLAYEDHOST, this->GetDisplayedHost(), "is now your displayed host"); return true; } void User::ChangeRealHost(const std::string& host, bool resetdisplay) { // If the real host is the new host and we are not resetting the // display host then we have nothing to do. const bool changehost = (realhost != host); if (!changehost && !resetdisplay) return; // If the displayhost is not set and we are not resetting it then // we need to copy it to the displayhost field. if (displayhost.empty() && !resetdisplay) displayhost = realhost; // If the displayhost is the new host or we are resetting it then // we clear its contents to save memory. else if (displayhost == host || resetdisplay) displayhost.clear(); // If we are just resetting the display host then we don't need to // do anything else. if (!changehost) return; // Don't call the OnChangeRealHost event when initialising a user. const bool initializing = realhost.empty(); if (!initializing) FOREACH_MOD(OnChangeRealHost, (this, host)); realhost = host; this->InvalidateCache(); // Don't call the OnPostChangeRealHost event when initialising a user. if (!this->quitting && !initializing) FOREACH_MOD(OnPostChangeRealHost, (this)); } bool User::ChangeIdent(const std::string& newident) { if (this->ident == newident) return true; FOREACH_MOD(OnChangeIdent, (this, newident)); this->ident.assign(newident, 0, ServerInstance->Config->Limits.MaxUser); this->InvalidateCache(); return true; } void User::PurgeEmptyChannels() { // firstly decrement the count on each channel for (User::ChanList::iterator i = this->chans.begin(); i != this->chans.end(); ) { Channel* c = (*i)->chan; ++i; c->DelUser(this); } } void User::WriteNotice(const std::string& text) { LocalUser* const localuser = IS_LOCAL(this); if (!localuser) return; ClientProtocol::Messages::Privmsg msg(ClientProtocol::Messages::Privmsg::nocopy, ServerInstance->FakeClient, localuser, text, MSG_NOTICE); localuser->Send(ServerInstance->GetRFCEvents().privmsg, msg); } const std::string& FakeUser::GetFullHost() { return server->GetPublicName(); } const std::string& FakeUser::GetFullRealHost() { return server->GetPublicName(); } ConnectClass::ConnectClass(std::shared_ptr tag, Type t, const std::vector& masks) : config(tag) , hosts(masks) , name("unnamed") , type(t) , fakelag(true) , maxconnwarn(true) , resolvehostnames(true) , uniqueusername(false) { } ConnectClass::ConnectClass(std::shared_ptr tag, Type t, const std::vector& masks, const std::shared_ptr& parent) { Update(parent); name = "unnamed"; type = t; hosts = masks; // Connect classes can inherit from each other but this is problematic for modules which can't use // ConnectClass::Update so we build a hybrid tag containing all of the values set on this class as // well as the parent class. config = std::make_shared(tag->name, tag->source); for (const auto& [key, value] : parent->config->GetItems()) { // The class name and parent name are not inherited if (stdalgo::string::equalsci(key, "name") || stdalgo::string::equalsci(key, "parent")) continue; // Store the item in the config tag. If this item also // exists in the child it will be overwritten. config->GetItems()[key] = value; } for (const auto& [key, value] : tag->GetItems()) { // This will overwrite the parent value if present. config->GetItems()[key] = value; } } void ConnectClass::Configure(const std::string& classname, std::shared_ptr tag) { name = classname; password = tag->getString("password", password); passwordhash = tag->getString("hash", passwordhash); if (!password.empty() && (passwordhash.empty() || stdalgo::string::equalsci(passwordhash, "plaintext"))) { ServerInstance->Logs.Normal("CONNECTCLASS", " tag '%s' at %s contains an plain text password, this is insecure!", name.c_str(), tag->source.str().c_str()); } irc::portparser portrange(tag->getString("port"), false); while (long port = portrange.GetToken()) { if (port > std::numeric_limits::min() && port <= std::numeric_limits::max()) ports.insert(static_cast(port)); } commandrate = tag->getUInt("commandrate", commandrate, 1); fakelag = tag->getBool("fakelag", fakelag); hardsendqmax = tag->getUInt("hardsendq", hardsendqmax, ServerInstance->Config->Limits.MaxLine); limit = tag->getUInt("limit", limit, 1); maxchans = tag->getUInt("maxchans", maxchans); maxconnwarn = tag->getBool("maxconnwarn", maxconnwarn); maxlocal = tag->getUInt("localmax", maxlocal); maxglobal = tag->getUInt("globalmax", maxglobal, maxlocal); penaltythreshold = tag->getUInt("threshold", penaltythreshold, 1); pingtime = tag->getDuration("pingfreq", pingtime); recvqmax = tag->getUInt("recvq", recvqmax, ServerInstance->Config->Limits.MaxLine); connection_timeout = tag->getDuration("timeout", connection_timeout); resolvehostnames = tag->getBool("resolvehostnames", resolvehostnames); softsendqmax = tag->getUInt("softsendq", softsendqmax, ServerInstance->Config->Limits.MaxLine); uniqueusername = tag->getBool("uniqueusername", uniqueusername); } void ConnectClass::Update(const std::shared_ptr& src) { ServerInstance->Logs.Debug("CONNECTCLASS", "Updating %s from %s", name.c_str(), src->name.c_str()); commandrate = src->commandrate; config = src->config; fakelag = src->fakelag; hardsendqmax = src->hardsendqmax; hosts = src->hosts; limit = src->limit; maxchans = src->maxchans; maxconnwarn = src->maxconnwarn; maxglobal = src->maxglobal; maxlocal = src->maxlocal; name = src->name; password = src->password; passwordhash = src->passwordhash; penaltythreshold = src->penaltythreshold; pingtime = src->pingtime; ports = src->ports; recvqmax = src->recvqmax; connection_timeout = src->connection_timeout; resolvehostnames = src->resolvehostnames; softsendqmax = src->softsendqmax; type = src->type; uniqueusername = src->uniqueusername; } OperType::OperType(const std::string& n, const std::shared_ptr& t) : config(std::make_shared("generated", FilePosition("", 0, 0))) , name(n) { if (t) Configure(t, true); } void OperType::Configure(const std::shared_ptr& tag, bool merge) { commands.AddList(tag->getString("commands")); privileges.AddList(tag->getString("privs")); auto modefn = [&tag](ModeParser::ModeStatus& modes, const std::string& key) { bool adding = true; for (const auto& chr : tag->getString(key)) { if (chr == '+' || chr == '-') adding = (chr == '+'); else if (chr == '*' && adding) modes.set(); else if (chr == '*' && !adding) modes.reset(); else if (ModeParser::IsModeChar(chr)) modes.set(ModeParser::GetModeIndex(chr), adding); } }; modefn(chanmodes, "chanmodes"); modefn(usermodes, "usermodes"); modefn(snomasks, "snomasks"); if (merge) MergeTag(tag); } std::string OperType::GetCommands(bool all) const { if (all) return commands.ToString(); std::vector ret; for (const auto& [_, cmd] : ServerInstance->Parser.GetCommands()) { if (cmd->access_needed == CmdAccess::OPERATOR && CanUseCommand(cmd->name)) ret.push_back(cmd->name); } std::sort(ret.begin(), ret.end()); return stdalgo::string::join(ret); } std::string OperType::GetModes(ModeType mt, bool all) const { std::string ret; for (unsigned char chr = '0'; chr <= 'z'; ++chr) { if (!ModeParser::IsModeChar(chr)) continue; ModeHandler* mh = ServerInstance->Modes.FindMode(chr, mt); if ((all || (mh && mh->NeedsOper())) && CanUseMode(mt, chr)) ret.push_back(chr); } return ret; } std::string OperType::GetSnomasks(bool all) const { std::string ret; for (unsigned char sno = 'A'; sno <= 'z'; ++sno) { if (!SnomaskManager::IsSnomask(sno)) continue; if ((all || ServerInstance->SNO.IsSnomaskUsable(sno)) && CanUseSnomask(sno)) ret.push_back(sno); } return ret; } bool OperType::CanUseCommand(const std::string& cmd) const { return commands.Contains(cmd); } bool OperType::CanUseMode(ModeType mt, unsigned char chr) const { const size_t index = ModeParser::GetModeIndex(chr); if (index == ModeParser::MODEID_MAX) return false; return (mt == MODETYPE_USER ? usermodes : chanmodes)[index]; } bool OperType::CanUseSnomask(unsigned char chr) const { if (SnomaskManager::IsSnomask(chr)) return snomasks[ModeParser::GetModeIndex(chr)]; return false; } bool OperType::HasPrivilege(const std::string& priv) const { return privileges.Contains(priv); } void OperType::MergeTag(const std::shared_ptr& tag) { for (const auto& [key, value] : tag->GetItems()) { if (stdalgo::string::equalsci(key, "name") || stdalgo::string::equalsci(key, "type") || stdalgo::string::equalsci(key, "classes")) { // These are meta keys for linking the oper/type/class tags. continue; } if (stdalgo::string::equalsci(key, "commands") || stdalgo::string::equalsci(key, "privs") || stdalgo::string::equalsci(key, "chanmodes") || stdalgo::string::equalsci(key, "usermodes") || stdalgo::string::equalsci(key, "snomasks")) { // These have already been parsed into the object. continue; } config->GetItems()[key] = value; } } OperAccount::OperAccount(const std::string& n, const std::shared_ptr& o, const std::shared_ptr& t) : OperType(n, nullptr) , password(t->getString("password")) , passwordhash(t->getString("hash", "plaintext", 1)) , type(o ? o->GetName() : n) { autologin = t->getEnum("autologin", AL_NEVER, { { "strict", AL_STRICT }, { "relaxed", AL_RELAXED }, { "never", AL_NEVER }, }); if (o) { chanmodes = o->chanmodes; commands = o->commands; privileges = o->privileges; snomasks = o->snomasks; usermodes = o->usermodes; Configure(o->GetConfig(), true); } Configure(t, true); } bool OperAccount::CanAutoLogin(LocalUser* user) const { switch (autologin) { case AL_STRICT: return user->nick == GetName(); case AL_RELAXED: return true; case AL_NEVER: return false; } // Should never be reached. return false; } bool OperAccount::CheckPassword(const std::string& pw) const { return ServerInstance->PassCompare(password, pw, passwordhash); }