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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019 nia <nia@netbsd.org>
* Copyright (C) 2013-2014, 2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2013, 2016-2017, 2020 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2013 Adam <Adam@anope.org>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
* Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008, 2010 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "exitcodes.h"
#include <signal.h>
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 <middle> 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<std::string, std::string> 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<std::string, std::string>::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<std::string, std::string>::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<Numeric::Numeric>::const_iterator i = cachedlines.begin(); i != cachedlines.end(); ++i)
user->WriteNumeric(*i);
}
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