/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2019 nia * Copyright (C) 2013-2014, 2016 Attila Molnar * Copyright (C) 2013, 2016-2017, 2020 Sadie Powell * Copyright (C) 2013 Adam * Copyright (C) 2012 Robby * Copyright (C) 2012 ChrisTX * Copyright (C) 2009 Uli Schlachter * Copyright (C) 2009 Daniel De Graaf * Copyright (C) 2008, 2010 Craig Edwards * Copyright (C) 2007-2008 Robin Burchell * Copyright (C) 2007 Dennis Friis * * 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 "exitcodes.h" #include void InspIRCd::SignalHandler(int signal) { #ifdef _WIN32 if (signal == SIGTERM) #else if (signal == SIGHUP) { ServerInstance->SNO->WriteGlobalSno('a', "Rehashing due to SIGHUP"); Rehash(); } else if (signal == SIGTERM) #endif { Exit(EXIT_STATUS_SIGTERM); } } void InspIRCd::Exit(int status) { #ifdef _WIN32 SetServiceStopped(status); #endif this->Cleanup(); ServerInstance = NULL; delete this; exit (status); } void InspIRCd::Rehash(const std::string& uuid) { if (!ServerInstance->ConfigThread) { ServerInstance->ConfigThread = new ConfigReaderThread(uuid); ServerInstance->Threads.Start(ServerInstance->ConfigThread); } } std::string InspIRCd::GetVersionString(bool getFullVersion) { if (getFullVersion) return INSPIRCD_VERSION ". " + Config->ServerName + " :[" + Config->sid + "] " + Config->CustomVersion; return INSPIRCD_BRANCH ". " + Config->GetServerName() + " :" + Config->CustomVersion; } std::string UIDGenerator::GenerateSID(const std::string& servername, const std::string& serverdesc) { unsigned int sid = 0; for (std::string::const_iterator i = servername.begin(); i != servername.end(); ++i) sid = 5 * sid + *i; for (std::string::const_iterator i = serverdesc.begin(); i != serverdesc.end(); ++i) sid = 5 * sid + *i; std::string sidstr = ConvToStr(sid % 1000); sidstr.insert(0, 3 - sidstr.length(), '0'); return sidstr; } void UIDGenerator::IncrementUID(unsigned int pos) { /* * Okay. The rules for generating a UID go like this... * -- > ABCDEFGHIJKLMNOPQRSTUVWXYZ --> 012345679 --> WRAP * That is, we start at A. When we reach Z, we go to 0. At 9, we go to * A again, in an iterative fashion.. so.. * AAA9 -> AABA, and so on. -- w00t */ // If we hit Z, wrap around to 0. if (current_uid[pos] == 'Z') { current_uid[pos] = '0'; } else if (current_uid[pos] == '9') { /* * Or, if we hit 9, wrap around to pos = 'A' and (pos - 1)++, * e.g. A9 -> BA -> BB .. */ current_uid[pos] = 'A'; if (pos == 3) { // At pos 3, if we hit '9', we've run out of available UIDs, and reset to AAA..AAA. return; } this->IncrementUID(pos - 1); } else { // Anything else, nobody gives a shit. Just increment. current_uid[pos]++; } } void UIDGenerator::init(const std::string& sid) { /* * Copy SID into the first three digits, 9's to the rest, null term at the end * Why 9? Well, we increment before we find, otherwise we have an unnecessary copy, and I want UID to start at AAA..AA * and not AA..AB. So by initialising to 99999, we force it to rollover to AAAAA on the first IncrementUID call. * Kind of silly, but I like how it looks. * -- w */ current_uid.resize(UUID_LENGTH, '9'); current_uid[0] = sid[0]; current_uid[1] = sid[1]; current_uid[2] = sid[2]; } /* * Retrieve the next valid UUID that is free for this server. */ std::string UIDGenerator::GetUID() { while (1) { // Add one to the last UID this->IncrementUID(UUID_LENGTH - 1); if (!ServerInstance->FindUUID(current_uid)) break; /* * It's in use. We need to try the loop again. */ } return current_uid; } void ISupportManager::AppendValue(std::string& buffer, const std::string& value) { // If this token has no value then we have nothing to do. if (value.empty()) return; // This function implements value escaping according to the rules of the ISUPPORT draft: // https://tools.ietf.org/html/draft-brocklesby-irc-isupport-03 buffer.push_back('='); for (std::string::const_iterator iter = value.begin(); iter != value.end(); ++iter) { // The value must be escaped if: // (1) It is a banned character in an IRC parameter (NUL, LF, CR, SPACE). // (2) It has special meaning within an ISUPPORT token (EQUALS, BACKSLASH). if (*iter == '\0' || *iter == '\n' || *iter == '\r' || *iter == ' ' || *iter == '=' || *iter == '\\') buffer.append(InspIRCd::Format("\\x%X", *iter)); else buffer.push_back(*iter); } } void ISupportManager::Build() { /** * This is currently the neatest way we can build the initial ISUPPORT map. In * the future we can use an initializer list here. */ std::map tokens; tokens["AWAYLEN"] = ConvToStr(ServerInstance->Config->Limits.MaxAway); tokens["CASEMAPPING"] = ServerInstance->Config->CaseMapping; tokens["CHANLIMIT"] = InspIRCd::Format("#:%u", ServerInstance->Config->MaxChans); tokens["CHANNELLEN"] = ConvToStr(ServerInstance->Config->Limits.ChanMax); tokens["CHANTYPES"] = "#"; tokens["HOSTLEN"] = ConvToStr(ServerInstance->Config->Limits.MaxHost); tokens["KICKLEN"] = ConvToStr(ServerInstance->Config->Limits.MaxKick); tokens["LINELEN"] = ConvToStr(ServerInstance->Config->Limits.MaxLine); tokens["MAXTARGETS"] = ConvToStr(ServerInstance->Config->MaxTargets); tokens["MODES"] = ConvToStr(ServerInstance->Config->Limits.MaxModes); tokens["NAMELEN"] = ConvToStr(ServerInstance->Config->Limits.MaxReal); tokens["NETWORK"] = ServerInstance->Config->Network; tokens["NICKLEN"] = ConvToStr(ServerInstance->Config->Limits.NickMax); tokens["PREFIX"] = ServerInstance->Modes->BuildPrefixes(); tokens["STATUSMSG"] = ServerInstance->Modes->BuildPrefixes(false); tokens["TOPICLEN"] = ConvToStr(ServerInstance->Config->Limits.MaxTopic); tokens["USERLEN"] = ConvToStr(ServerInstance->Config->Limits.IdentMax); // Modules can add new tokens and also edit or remove existing tokens FOREACH_MOD(On005Numeric, (tokens)); // EXTBAN is a special case as we need to sort it and prepend a comma. std::map::iterator extban = tokens.find("EXTBAN"); if (extban != tokens.end()) { std::sort(extban->second.begin(), extban->second.end()); extban->second.insert(0, ","); } // Transform the map into a list of lines, ready to be sent to clients Numeric::Numeric numeric(RPL_ISUPPORT); unsigned int token_count = 0; cachedlines.clear(); for (std::map::const_iterator it = tokens.begin(); it != tokens.end(); ++it) { numeric.push(it->first); std::string& token = numeric.GetParams().back(); AppendValue(token, it->second); token_count++; if (token_count % 13 == 12 || it == --tokens.end()) { // Reached maximum number of tokens for this line or the current token // is the last one; finalize the line and store it for later use numeric.push("are supported by this server"); cachedlines.push_back(numeric); numeric.GetParams().clear(); } } } void ISupportManager::SendTo(LocalUser* user) { for (std::vector::const_iterator i = cachedlines.begin(); i != cachedlines.end(); ++i) user->WriteNumeric(*i); }