/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
 *   Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
 *   Copyright (C) 2013-2014, 2016-2021 Sadie Powell <sadie@witchery.services>
 *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
 *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
 *   Copyright (C) 2012 Justin Crawford <Justasic@Gmail.com>
 *   Copyright (C) 2012 DjSlash <djslash@djslash.org>
 *   Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
 *   Copyright (C) 2009-2011 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
 *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
 *   Copyright (C) 2007-2010 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006-2008 Craig Edwards <brain@inspircd.org>
 *   Copyright (C) 2006 Oliver Lupton <om@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 "xline.h"
#include "listmode.h"
#include "exitcodes.h"
#include "configparser.h"
#include <iostream>

ServerLimits::ServerLimits(ConfigTag* tag)
	: MaxLine(tag->getUInt("maxline", 512, 512))
	, NickMax(tag->getUInt("maxnick", 30, 1, MaxLine))
	, ChanMax(tag->getUInt("maxchan", 64, 1, MaxLine))
	, MaxModes(tag->getUInt("maxmodes", 20, 1))
	, IdentMax(tag->getUInt("maxident", 10, 1))
	, MaxQuit(tag->getUInt("maxquit", 255, 0, MaxLine))
	, MaxTopic(tag->getUInt("maxtopic", 307, 1, MaxLine))
	, MaxKick(tag->getUInt("maxkick", 255, 1, MaxLine))
	, MaxReal(tag->getUInt("maxreal", tag->getUInt("maxgecos", 128), 1, MaxLine))
	, MaxAway(tag->getUInt("maxaway", 200, 1, MaxLine))
	, MaxHost(tag->getUInt("maxhost", 64, 1, MaxLine))
{
}

ServerConfig::ServerPaths::ServerPaths(ConfigTag* tag)
	: Config(tag->getString("configdir", INSPIRCD_CONFIG_PATH, 1))
	, Data(tag->getString("datadir", INSPIRCD_DATA_PATH, 1))
	, Log(tag->getString("logdir", INSPIRCD_LOG_PATH, 1))
	, Module(tag->getString("moduledir", INSPIRCD_MODULE_PATH, 1))
	, Runtime(tag->getString("runtimedir", INSPIRCD_RUNTIME_PATH, 1))
{
}

static ConfigTag* CreateEmptyTag()
{
	ConfigItems* items;
	return ConfigTag::create("empty", "<auto>", 0, items);
}

ServerConfig::ServerConfig()
	: EmptyTag(CreateEmptyTag())
	, Limits(EmptyTag)
	, Paths(EmptyTag)
	, RawLog(false)
	, NoSnoticeStack(false)
{
}

ServerConfig::~ServerConfig()
{
	delete EmptyTag;
}

static void ReadXLine(ServerConfig* conf, const std::string& tag, const std::string& key, XLineFactory* make)
{
	insp::flat_set<std::string> configlines;

	ConfigTagList tags = conf->ConfTags(tag);
	for(ConfigIter i = tags.first; i != tags.second; ++i)
	{
		ConfigTag* ctag = i->second;

		const std::string mask = ctag->getString(key);
		if (mask.empty())
			throw CoreException("<" + tag + ":" + key + "> missing at " + ctag->getTagLocation());

		const std::string reason = ctag->getString("reason");
		if (reason.empty())
			throw CoreException("<" + tag + ":reason> missing at " + ctag->getTagLocation());

		XLine* xl = make->Generate(ServerInstance->Time(), 0, ServerInstance->Config->ServerName, reason, mask);
		xl->from_config = true;
		configlines.insert(xl->Displayable());
		if (!ServerInstance->XLines->AddLine(xl, NULL))
			delete xl;
	}

	ServerInstance->XLines->ExpireRemovedConfigLines(make->GetType(), configlines);
}

typedef std::map<std::string, ConfigTag*> LocalIndex;
void ServerConfig::CrossCheckOperClassType()
{
	LocalIndex operclass;
	ConfigTagList tags = ConfTags("class");
	for(ConfigIter i = tags.first; i != tags.second; ++i)
	{
		ConfigTag* tag = i->second;
		std::string name = tag->getString("name");
		if (name.empty())
			throw CoreException("<class:name> missing from tag at " + tag->getTagLocation());
		if (operclass.find(name) != operclass.end())
			throw CoreException("Duplicate class block with name " + name + " at " + tag->getTagLocation());
		operclass[name] = tag;
	}
	tags = ConfTags("type");
	for(ConfigIter i = tags.first; i != tags.second; ++i)
	{
		ConfigTag* tag = i->second;
		std::string name = tag->getString("name");
		if (name.empty())
			throw CoreException("<type:name> is missing from tag at " + tag->getTagLocation());
		if (OperTypes.find(name) != OperTypes.end())
			throw CoreException("Duplicate type block with name " + name + " at " + tag->getTagLocation());

		OperInfo* ifo = new OperInfo(name);
		OperTypes[name] = ifo;
		ifo->type_block = tag;

		std::string classname;
		irc::spacesepstream str(tag->getString("classes"));
		while (str.GetToken(classname))
		{
			LocalIndex::iterator cls = operclass.find(classname);
			if (cls == operclass.end())
				throw CoreException("Oper type " + name + " has missing class " + classname);
			ifo->class_blocks.push_back(cls->second);
		}
	}

	tags = ConfTags("oper");
	for(ConfigIter i = tags.first; i != tags.second; ++i)
	{
		ConfigTag* tag = i->second;

		std::string name = tag->getString("name");
		if (name.empty())
			throw CoreException("<oper:name> missing from tag at " + tag->getTagLocation());

		std::string type = tag->getString("type");
		OperIndex::iterator tblk = OperTypes.find(type);
		if (tblk == OperTypes.end())
			throw CoreException("Oper block " + name + " has missing type " + type);
		if (oper_blocks.find(name) != oper_blocks.end())
			throw CoreException("Duplicate oper block with name " + name + " at " + tag->getTagLocation());

		OperInfo* ifo = new OperInfo(type);
		ifo->oper_block = tag;
		ifo->type_block = tblk->second->type_block;
		ifo->class_blocks.assign(tblk->second->class_blocks.begin(), tblk->second->class_blocks.end());
		oper_blocks[name] = ifo;
	}
}

void ServerConfig::CrossCheckConnectBlocks(ServerConfig* current)
{
	typedef std::map<std::pair<std::string, char>, ConnectClass*> ClassMap;
	ClassMap oldBlocksByMask;
	if (current)
	{
		for(ClassVector::iterator i = current->Classes.begin(); i != current->Classes.end(); ++i)
		{
			ConnectClass* c = *i;
			switch (c->type)
			{
				case CC_ALLOW:
				case CC_DENY:
					oldBlocksByMask[std::make_pair(c->host, c->type)] = c;
					break;

				case CC_NAMED:
					oldBlocksByMask[std::make_pair(c->name, c->type)] = c;
					break;
			}
		}
	}

	size_t blk_count = config_data.count("connect");
	if (blk_count == 0)
	{
		// No connect blocks found; make a trivial default block
		ConfigItems* items;
		ConfigTag* tag = ConfigTag::create("connect", "<auto>", 0, items);
		(*items)["allow"] = "*";
		config_data.insert(std::make_pair("connect", tag));
		blk_count = 1;
	}

	Classes.resize(blk_count);
	std::map<std::string, size_t> names;

	bool try_again = true;
	for(size_t tries = 0; try_again; tries++)
	{
		try_again = false;
		ConfigTagList tags = ConfTags("connect");
		size_t i = 0;
		for(ConfigIter it = tags.first; it != tags.second; ++it, ++i)
		{
			ConfigTag* tag = it->second;
			if (Classes[i])
				continue;

			ConnectClass* parent = NULL;
			std::string parentName = tag->getString("parent");
			if (!parentName.empty())
			{
				std::map<std::string, size_t>::const_iterator parentIter = names.find(parentName);
				if (parentIter == names.end())
				{
					try_again = true;
					// couldn't find parent this time. If it's the last time, we'll never find it.
					if (tries >= blk_count)
						throw CoreException("Could not find parent connect class \"" + parentName + "\" for connect block at " + tag->getTagLocation());
					continue;
				}
				parent = Classes[parentIter->second];
			}

			std::string name = tag->getString("name");
			std::string mask;
			char type;

			if (tag->readString("allow", mask, false) && !mask.empty())
				type = CC_ALLOW;
			else if (tag->readString("deny", mask, false) && !mask.empty())
				type = CC_DENY;
			else if (!name.empty())
			{
				type = CC_NAMED;
				mask = name;
			}
			else
			{
				throw CoreException("Connect class must have allow, deny, or name specified at " + tag->getTagLocation());
			}

			if (name.empty())
				name = "unnamed-" + ConvToStr(i);

			if (names.find(name) != names.end())
				throw CoreException("Two connect classes with name \"" + name + "\" defined!");
			names[name] = i;

			ConnectClass* me = parent ?
				new ConnectClass(tag, type, mask, *parent) :
				new ConnectClass(tag, type, mask);

			me->name = name;

			me->registration_timeout = tag->getDuration("timeout", me->registration_timeout);
			me->pingtime = tag->getDuration("pingfreq", me->pingtime);
			std::string sendq;
			if (tag->readString("sendq", sendq))
			{
				// attempt to guess a good hard/soft sendq from a single value
				unsigned long value = strtoul(sendq.c_str(), NULL, 10);
				if (value > 16384)
					me->softsendqmax = value / 16;
				else
					me->softsendqmax = value;
				me->hardsendqmax = value * 8;
			}
			me->softsendqmax = tag->getUInt("softsendq", me->softsendqmax);
			me->hardsendqmax = tag->getUInt("hardsendq", me->hardsendqmax);
			me->recvqmax = tag->getUInt("recvq", me->recvqmax);
			me->penaltythreshold = tag->getUInt("threshold", me->penaltythreshold);
			me->commandrate = tag->getUInt("commandrate", me->commandrate);
			me->fakelag = tag->getBool("fakelag", me->fakelag);
			me->maxlocal = tag->getUInt("localmax", me->maxlocal);
			me->maxglobal = tag->getUInt("globalmax", me->maxglobal);
			me->maxchans = tag->getUInt("maxchans", me->maxchans);
			me->maxconnwarn = tag->getBool("maxconnwarn", me->maxconnwarn);
			me->limit = tag->getUInt("limit", me->limit);
			me->resolvehostnames = tag->getBool("resolvehostnames", me->resolvehostnames);
			me->password = tag->getString("password", me->password);

			me->passwordhash = tag->getString("hash", me->passwordhash);
			if (!me->password.empty() && (me->passwordhash.empty() || stdalgo::string::equalsci(me->passwordhash, "plaintext")))
			{
				ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEFAULT, "<connect> tag '%s' at %s contains an plain text password, this is insecure!",
					name.c_str(), tag->getTagLocation().c_str());
			}

			std::string ports = tag->getString("port");
			if (!ports.empty())
			{
				irc::portparser portrange(ports, false);
				while (int port = portrange.GetToken())
					me->ports.insert(port);
			}

			ClassMap::iterator oldMask = oldBlocksByMask.find(std::make_pair(me->name, me->type));
			if (oldMask != oldBlocksByMask.end())
			{
				ConnectClass* old = oldMask->second;
				oldBlocksByMask.erase(oldMask);
				old->Update(me);
				delete me;
				me = old;
			}
			Classes[i] = me;
		}
	}
}

static std::string GetServerHost()
{
#ifndef _WIN32
	char hostname[256];
	if (gethostname(hostname, sizeof(hostname)) == 0)
	{
		std::string name(hostname);
		if (name.find('.') == std::string::npos)
			name.push_back('.');

		if (name.length() <= ServerInstance->Config->Limits.MaxHost && InspIRCd::IsHost(name))
			return name;
	}
#endif
	return "irc.example.com";
}

void ServerConfig::Fill()
{
	ConfigTag* options = ConfValue("options");
	ConfigTag* security = ConfValue("security");
	ConfigTag* server = ConfValue("server");
	if (sid.empty())
	{
		ServerName = server->getString("name", GetServerHost(), InspIRCd::IsHost);

		sid = server->getString("id");
		if (!sid.empty() && !InspIRCd::IsSID(sid))
			throw CoreException(sid + " is not a valid server ID. A server ID must be 3 characters long, with the first character a digit and the next two characters a digit or letter.");

		CaseMapping = options->getString("casemapping", "rfc1459", 1);
		if (CaseMapping == "ascii")
			national_case_insensitive_map = ascii_case_insensitive_map;
		else if (CaseMapping == "rfc1459")
			national_case_insensitive_map = rfc_case_insensitive_map;
		else
			throw CoreException("<options:casemapping> must be set to 'ascii', or 'rfc1459'");
	}
	else
	{
		std::string name = server->getString("name");
		if (!name.empty() && name != ServerName)
			throw CoreException("You must restart to change the server name");

		std::string nsid = server->getString("id");
		if (!nsid.empty() && nsid != sid)
			throw CoreException("You must restart to change the server id");

		std::string casemapping = options->getString("casemapping");
		// Ignore this value if CaseMapping is set to something the core doesn't provide (i.e., m_nationalchars).
		if (!casemapping.empty() && casemapping != CaseMapping && (CaseMapping == "ascii" || CaseMapping == "rfc1459"))
			throw CoreException("You must restart to change the server casemapping");

	}
	SoftLimit = ConfValue("performance")->getUInt("softlimit", (SocketEngine::GetMaxFds() > 0 ? SocketEngine::GetMaxFds() : LONG_MAX), 10);
	CCOnConnect = ConfValue("performance")->getBool("clonesonconnect", true);
	MaxConn = ConfValue("performance")->getUInt("somaxconn", SOMAXCONN);
	TimeSkipWarn = ConfValue("performance")->getDuration("timeskipwarn", 2, 0, 30);
	XLineMessage = options->getString("xlinemessage", options->getString("moronbanner", "You're banned!"));
	ServerDesc = server->getString("description", "Configure Me", 1);
	Network = server->getString("network", "Network", 1);
	NetBufferSize = ConfValue("performance")->getInt("netbuffersize", 10240, 1024, 65534);
	CustomVersion = security->getString("customversion");
	HideBans = security->getBool("hidebans");
	HideServer = security->getString("hideserver", security->getString("hidewhois"));
	SyntaxHints = options->getBool("syntaxhints");
	FullHostInTopic = options->getBool("hostintopic");
	MaxTargets = security->getUInt("maxtargets", 20, 1, 31);
	DefaultModes = options->getString("defaultmodes", "not");
	PID = ConfValue("pid")->getString("file");
	MaxChans = ConfValue("channels")->getUInt("users", 20);
	OperMaxChans = ConfValue("channels")->getUInt("opers", 0);
	c_ipv4_range = ConfValue("cidr")->getUInt("ipv4clone", 32, 1, 32);
	c_ipv6_range = ConfValue("cidr")->getUInt("ipv6clone", 128, 1, 128);
	Limits = ServerLimits(ConfValue("limits"));
	Paths = ServerPaths(ConfValue("path"));
	NoSnoticeStack = options->getBool("nosnoticestack", false);

	std::string defbind = options->getString("defaultbind");
	if (stdalgo::string::equalsci(defbind, "ipv4"))
	{
		WildcardIPv6 = false;
	}
	else if (stdalgo::string::equalsci(defbind, "ipv6"))
	{
		WildcardIPv6 = true;
	}
	else
	{
		WildcardIPv6 = true;
		int socktest = socket(AF_INET6, SOCK_STREAM, 0);
		if (socktest < 0)
			WildcardIPv6 = false;
		else
			SocketEngine::Close(socktest);
	}

	ReadXLine(this, "badip", "ipmask", ServerInstance->XLines->GetFactory("Z"));
	ReadXLine(this, "badnick", "nick", ServerInstance->XLines->GetFactory("Q"));
	ReadXLine(this, "badhost", "host", ServerInstance->XLines->GetFactory("K"));
	ReadXLine(this, "exception", "host", ServerInstance->XLines->GetFactory("E"));

	const std::string restrictbannedusers = options->getString("restrictbannedusers", "yes", 1);
	if (stdalgo::string::equalsci(restrictbannedusers, "no"))
		RestrictBannedUsers = ServerConfig::BUT_NORMAL;
	else if (stdalgo::string::equalsci(restrictbannedusers, "silent"))
		RestrictBannedUsers = ServerConfig::BUT_RESTRICT_SILENT;
	else if (stdalgo::string::equalsci(restrictbannedusers, "yes"))
		RestrictBannedUsers =  ServerConfig::BUT_RESTRICT_NOTIFY;
	else
		throw CoreException(restrictbannedusers + " is an invalid <options:restrictbannedusers> value, at " + options->getTagLocation());
}

// WARNING: it is not safe to use most of the codebase in this function, as it
// will run in the config reader thread
void ServerConfig::Read()
{
	/* Load and parse the config file, if there are any errors then explode */

	ParseStack stack(this);
	try
	{
		valid = stack.ParseFile(ServerInstance->ConfigFileName, 0);
	}
	catch (CoreException& err)
	{
		valid = false;
		errstr << err.GetReason() << std::endl;
	}
}

void ServerConfig::Apply(ServerConfig* old, const std::string &useruid)
{
	valid = true;
	if (old)
	{
		/*
		 * These values can only be set on boot. Keep their old values. Do it before we send messages so we actually have a servername.
		 */
		this->CaseMapping = old->CaseMapping;
		this->ServerName = old->ServerName;
		this->sid = old->sid;
		this->cmdline = old->cmdline;
	}

	/* The stuff in here may throw CoreException, be sure we're in a position to catch it. */
	try
	{
		// Ensure the user has actually edited ther config.
		ConfigTagList dietags = ConfTags("die");
		if (dietags.first != dietags.second)
		{
			errstr << "Your configuration has not been edited correctly!" << std::endl;
			for (ConfigIter iter = dietags.first; iter != dietags.second; ++iter)
			{
				ConfigTag* tag = iter->second;
				const std::string reason = tag->getString("reason", "You left a <die> tag in your config", 1);
				errstr << reason <<  " (at " << tag->getTagLocation() << ")" << std::endl;
			}
		}

		Fill();

		// Handle special items
		CrossCheckOperClassType();
		CrossCheckConnectBlocks(old);
	}
	catch (CoreException &ce)
	{
		errstr << ce.GetReason() << std::endl;
	}

	// Check errors before dealing with failed binds, since continuing on failed bind is wanted in some circumstances.
	valid = errstr.str().empty();

	// write once here, to try it out and make sure its ok
	if (valid)
		ServerInstance->WritePID(this->PID, !old);

	ConfigTagList binds = ConfTags("bind");
	if (binds.first == binds.second)
		errstr << "Possible configuration error: you have not defined any <bind> blocks." << std::endl
			<< "You will need to do this if you want clients to be able to connect!" << std::endl;

	if (old && valid)
	{
		// On first run, ports are bound later on
		FailedPortList pl;
		ServerInstance->BindPorts(pl);
		if (!pl.empty())
		{
			errstr << "Warning! Some of your listener" << (pl.size() == 1 ? "s" : "") << " failed to bind:" << std::endl;
			for (FailedPortList::const_iterator iter = pl.begin(); iter != pl.end(); ++iter)
			{
				const FailedPort& fp = *iter;
				errstr << "  " << fp.sa.str() << ": " << strerror(fp.error) << std::endl
					<< "  " << "Created from <bind> tag at " << fp.tag->getTagLocation() << std::endl;
			}
		}
	}

	User* user = useruid.empty() ? NULL : ServerInstance->FindUUID(useruid);

	if (!valid)
	{
		ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "There were errors in your configuration file:");
		Classes.clear();
	}

	while (errstr.good())
	{
		std::string line;
		getline(errstr, line, '\n');
		if (line.empty())
			continue;
		// On startup, print out to console (still attached at this point)
		if (!old)
			std::cout << line << std::endl;
		// If a user is rehashing, tell them directly
		if (user)
			user->WriteRemoteNotice(InspIRCd::Format("*** %s", line.c_str()));
		// Also tell opers
		ServerInstance->SNO->WriteGlobalSno('a', line);
	}

	errstr.clear();
	errstr.str(std::string());

	/* No old configuration -> initial boot, nothing more to do here */
	if (!old)
	{
		if (!valid)
		{
			ServerInstance->Exit(EXIT_STATUS_CONFIG);
		}

		return;
	}


	// If there were errors processing configuration, don't touch modules.
	if (!valid)
		return;

	ApplyModules(user);

	if (user)
		user->WriteRemoteNotice("*** Successfully rehashed server.");
	ServerInstance->SNO->WriteGlobalSno('a', "*** Successfully rehashed server.");
}

void ServerConfig::ApplyModules(User* user)
{
	std::vector<std::string> added_modules;
	ModuleManager::ModuleMap removed_modules = ServerInstance->Modules->GetModules();

	ConfigTagList tags = ConfTags("module");
	for(ConfigIter i = tags.first; i != tags.second; ++i)
	{
		ConfigTag* tag = i->second;
		std::string name;
		if (tag->readString("name", name))
		{
			name = ModuleManager::ExpandModName(name);
			// if this module is already loaded, the erase will succeed, so we need do nothing
			// otherwise, we need to add the module (which will be done later)
			if (removed_modules.erase(name) == 0)
				added_modules.push_back(name);
		}
	}

	for (ModuleManager::ModuleMap::iterator i = removed_modules.begin(); i != removed_modules.end(); ++i)
	{
		const std::string& modname = i->first;
		// Don't remove core_*.so, just remove m_*.so
		if (InspIRCd::Match(modname, "core_*.so", ascii_case_insensitive_map))
			continue;
		if (ServerInstance->Modules->Unload(i->second))
		{
			ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH UNLOADED MODULE: %s", modname.c_str());

			if (user)
				user->WriteNumeric(RPL_UNLOADEDMODULE, modname, InspIRCd::Format("The %s module was unloaded.", modname.c_str()));
			else
				ServerInstance->SNO->WriteGlobalSno('a', "The %s module was unloaded.", modname.c_str());
		}
		else
		{
			if (user)
				user->WriteNumeric(ERR_CANTUNLOADMODULE, modname, InspIRCd::Format("Failed to unload the %s module: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str()));
			else
				ServerInstance->SNO->WriteGlobalSno('a', "Failed to unload the %s module: %s", modname.c_str(), ServerInstance->Modules->LastError().c_str());
		}
	}

	for (std::vector<std::string>::iterator adding = added_modules.begin(); adding != added_modules.end(); adding++)
	{
		// Skip modules which are already loaded.
		if (ServerInstance->Modules->Find(*adding))
			continue;

		if (ServerInstance->Modules->Load(*adding))
		{
			ServerInstance->SNO->WriteGlobalSno('a', "*** REHASH LOADED MODULE: %s",adding->c_str());
			if (user)
				user->WriteNumeric(RPL_LOADEDMODULE, *adding, InspIRCd::Format("The %s module was loaded.", adding->c_str()));
			else
				ServerInstance->SNO->WriteGlobalSno('a', "The %s module was loaded.", adding->c_str());
		}
		else
		{
			if (user)
				user->WriteNumeric(ERR_CANTLOADMODULE, *adding, InspIRCd::Format("Failed to load the %s module: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str()));
			else
				ServerInstance->SNO->WriteGlobalSno('a', "Failed to load the %s module: %s", adding->c_str(), ServerInstance->Modules->LastError().c_str());
		}
	}
}

ConfigTag* ServerConfig::ConfValue(const std::string &tag)
{
	ConfigTagList found = config_data.equal_range(tag);
	if (found.first == found.second)
		return EmptyTag;
	ConfigTag* rv = found.first->second;
	found.first++;
	if (found.first != found.second)
		ServerInstance->Logs->Log("CONFIG", LOG_DEFAULT, "Multiple <" + tag + "> tags found; only first will be used "
			"(first at " + rv->getTagLocation() + "; second at " + found.first->second->getTagLocation() + ")");
	return rv;
}

ConfigTagList ServerConfig::ConfTags(const std::string& tag)
{
	return config_data.equal_range(tag);
}

std::string ServerConfig::Escape(const std::string& str, bool xml)
{
	std::string escaped;
	for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
	{
		switch (*it)
		{
			case '"':
				escaped += xml ? "&quot;" : "\"";
				break;
			case '&':
				escaped += xml ? "&amp;" : "&";
				break;
			case '\\':
				escaped += xml ? "\\" : "\\\\";
				break;
			default:
				escaped += *it;
				break;
		}
	}
	return escaped;
}

void ConfigReaderThread::Run()
{
	Config->Read();
	done = true;
}

void ConfigReaderThread::Finish()
{
	ServerConfig* old = ServerInstance->Config;
	ServerInstance->Logs->Log("CONFIG", LOG_DEBUG, "Switching to new configuration...");
	ServerInstance->Config = this->Config;
	Config->Apply(old, TheUserUID);

	if (Config->valid)
	{
		/*
		 * Apply the changed configuration from the rehash.
		 *
		 * XXX: The order of these is IMPORTANT, do not reorder them without testing
		 * thoroughly!!!
		 */
		ServerInstance->Users.RehashCloneCounts();
		ServerInstance->XLines->CheckELines();
		ServerInstance->XLines->ApplyLines();
		User* user = ServerInstance->FindUUID(TheUserUID);

		ConfigStatus status(user);
		const ModuleManager::ModuleMap& mods = ServerInstance->Modules->GetModules();
		for (ModuleManager::ModuleMap::const_iterator i = mods.begin(); i != mods.end(); ++i)
		{
			try
			{
				ServerInstance->Logs->Log("MODULE", LOG_DEBUG, "Rehashing " + i->first);
				i->second->ReadConfig(status);
			}
			catch (CoreException& modex)
			{
				ServerInstance->Logs->Log("MODULE", LOG_DEFAULT, "Exception caught: " + modex.GetReason());
				if (user)
					user->WriteNotice(i->first + ": " + modex.GetReason());
			}
		}

		// The description of this server may have changed - update it for WHOIS etc.
		ServerInstance->FakeClient->server->description = Config->ServerDesc;

		ServerInstance->ISupport.Build();

		ServerInstance->Logs->CloseLogs();
		ServerInstance->Logs->OpenFileLogs();

		if (Config->RawLog && !old->RawLog)
			ServerInstance->Users->ServerNoticeAll("*** Raw I/O logging is enabled on this server. All messages, passwords, and commands are being recorded.");

		Config = old;
	}
	else
	{
		// whoops, abort!
		ServerInstance->Config = old;
	}
}