/* Inspircd 2.0 functions
 *
 * (C) 2003-2013 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church.
 */

/*************************************************************************/

#include "module.h"

static unsigned int spanningtree_proto_ver = 0;

static ServiceReference<IRCDProto> insp12("IRCDProto", "inspircd12");

class InspIRCd20Proto : public IRCDProto
{
 public:
	InspIRCd20Proto(Module *creator) : IRCDProto(creator, "InspIRCd 2.0")
	{
		DefaultPseudoclientModes = "+I";
		CanSVSNick = true;
		CanSVSJoin = true;
		CanSetVHost = true;
		CanSetVIdent = true;
		CanSQLine = true;
		CanSZLine = true;
		CanSVSHold = true;
		CanCertFP = true;
		RequiresID = true;
		MaxModes = 20;
	}

	void SendConnect() anope_override
	{
		UplinkSocket::Message() << "CAPAB START 1202";
		UplinkSocket::Message() << "CAPAB CAPABILITIES :PROTOCOL=1202";
		UplinkSocket::Message() << "CAPAB END";
		insp12->SendConnect();
	}

	void SendSVSKillInternal(const BotInfo *source, User *user, const Anope::string &buf) anope_override { insp12->SendSVSKillInternal(source, user, buf); }
	void SendGlobalNotice(const BotInfo *bi, const Server *dest, const Anope::string &msg) anope_override { insp12->SendGlobalNotice(bi, dest, msg); }
	void SendGlobalPrivmsg(const BotInfo *bi, const Server *dest, const Anope::string &msg) anope_override { insp12->SendGlobalPrivmsg(bi, dest, msg); }
	void SendAkillDel(const XLine *x) anope_override { insp12->SendAkillDel(x); }
	void SendTopic(BotInfo *whosets, Channel *c) anope_override { insp12->SendTopic(whosets, c); };
	void SendVhostDel(User *u) anope_override { insp12->SendVhostDel(u); }
	void SendAkill(User *u, XLine *x) anope_override { insp12->SendAkill(u, x); }
	void SendNumericInternal(int numeric, const Anope::string &dest, const Anope::string &buf) anope_override { insp12->SendNumericInternal(numeric, dest, buf); }
	void SendModeInternal(const BotInfo *source, const Channel *dest, const Anope::string &buf) anope_override { insp12->SendModeInternal(source, dest, buf); }
	void SendModeInternal(const BotInfo *bi, const User *u, const Anope::string &buf) anope_override { insp12->SendModeInternal(bi, u, buf); }
	void SendClientIntroduction(const User *u) anope_override { insp12->SendClientIntroduction(u); }
	void SendServer(const Server *server) anope_override { insp12->SendServer(server); }
	void SendJoin(const User *user, Channel *c, const ChannelStatus *status) anope_override { insp12->SendJoin(user, c, status); }
	void SendSQLineDel(const XLine *x) anope_override { insp12->SendSQLineDel(x); }
	void SendSQLine(User *u, const XLine *x) anope_override { insp12->SendSQLine(u, x); }
	void SendVhost(User *u, const Anope::string &vident, const Anope::string &vhost) anope_override { insp12->SendVhost(u, vident, vhost); }
	void SendSVSHold(const Anope::string &nick) anope_override { insp12->SendSVSHold(nick); }
	void SendSVSHoldDel(const Anope::string &nick) anope_override { insp12->SendSVSHoldDel(nick); }
	void SendSZLineDel(const XLine *x) anope_override { insp12->SendSZLineDel(x); }
	void SendSZLine(User *u, const XLine *x) anope_override { insp12->SendSZLine(u, x); }
	void SendSVSJoin(const BotInfo *source, const User *u, const Anope::string &chan, const Anope::string &other) anope_override { insp12->SendSVSJoin(source, u, chan, other); }
	void SendSVSPart(const BotInfo *source, const User *u, const Anope::string &chan, const Anope::string &param) anope_override { insp12->SendSVSPart(source, u, chan, param); }
	void SendSWhois(const BotInfo *bi, const Anope::string &who, const Anope::string &mask) anope_override { insp12->SendSWhois(bi, who, mask); }
	void SendBOB() anope_override { insp12->SendBOB(); }
	void SendEOB() anope_override { insp12->SendEOB(); }
	void SendGlobopsInternal(const BotInfo *source, const Anope::string &buf) { insp12->SendGlobopsInternal(source, buf); }
	void SendLogin(User *u) anope_override { insp12->SendLogin(u); }
	void SendLogout(User *u) anope_override { insp12->SendLogout(u); }
	void SendChannel(Channel *c) anope_override { insp12->SendChannel(c); }
};

class InspIRCdExtBan : public ChannelModeList
{
 public:
	InspIRCdExtBan(const Anope::string &mname, char modeChar) : ChannelModeList(mname, modeChar) { }

	bool Matches(const User *u, const Entry *e) anope_override
	{
		const Anope::string &mask = e->mask;

		if (mask.find("m:") == 0 || mask.find("N:") == 0)
		{
			Anope::string real_mask = mask.substr(3);

			Entry en(this->name, real_mask);
			if (en.Matches(u))
				return true;
		}
		else if (mask.find("j:") == 0)
		{
			Anope::string channel = mask.substr(3);

			ChannelMode *cm = NULL;
			if (channel[0] != '#')
			{
				char modeChar = ModeManager::GetStatusChar(channel[0]);
				channel.erase(channel.begin());
				cm = ModeManager::FindChannelModeByChar(modeChar);
				if (cm != NULL && cm->type != MODE_STATUS)
					cm = NULL;
			}

			Channel *c = Channel::Find(channel);
			if (c != NULL)
			{
				ChanUserContainer *uc = c->FindUser(u);
				if (uc != NULL)
					if (cm == NULL || uc->status.modes.count(cm->name))
						return true;
			}
		}
		else if (mask.find("R:") == 0)
		{
			Anope::string real_mask = mask.substr(2);

			if (u->IsIdentified() && real_mask.equals_ci(u->Account()->display))
				return true;
		}
		else if (mask.find("r:") == 0)
		{
			Anope::string real_mask = mask.substr(2);

			if (Anope::Match(u->realname, real_mask))
				return true;
		}
		else if (mask.find("s:") == 0)
		{
			Anope::string real_mask = mask.substr(2);

			if (Anope::Match(u->server->GetName(), real_mask))
				return true;
		}
		else if (mask.find("z:") == 0)
		{
			Anope::string real_mask = mask.substr(2);

			if (Anope::Match(u->fingerprint, real_mask))
				return true;
		}

		return false;
	}
};

class ChannelModeFlood : public ChannelModeParam
{
 public:
	ChannelModeFlood(char modeChar, bool minusNoArg) : ChannelModeParam("FLOOD", modeChar, minusNoArg) { }

	bool IsValid(const Anope::string &value) const anope_override
	{
		try
		{
			Anope::string rest;
			if (!value.empty() && value[0] != ':' && convertTo<int>(value[0] == '*' ? value.substr(1) : value, rest, false) > 0 && rest[0] == ':' && rest.length() > 1 && convertTo<int>(rest.substr(1), rest, false) > 0 && rest.empty())
				return true;
		}
		catch (const ConvertException &) { }

		return false;
	}
};

struct IRCDMessageCapab : Message::Capab
{
	IRCDMessageCapab(Module *creator) : Message::Capab(creator, "CAPAB") { SetFlag(IRCDMESSAGE_SOFT_LIMIT); }

	void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
	{
		if (params[0].equals_cs("START"))
		{
			if (params.size() >= 2)
				spanningtree_proto_ver = (Anope::string(params[1]).is_pos_number_only() ? convertTo<unsigned>(params[1]) : 0);

			if (spanningtree_proto_ver < 1202)
			{
				UplinkSocket::Message() << "ERROR :Protocol mismatch, no or invalid protocol version given in CAPAB START";
				Anope::QuitReason = "Protocol mismatch, no or invalid protocol version given in CAPAB START";
				Anope::Quitting = true;
				return;
			}

			/* reset CAPAB */
			Servers::Capab.insert("SERVERS");
			Servers::Capab.insert("CHGHOST");
			Servers::Capab.insert("CHGIDENT");
			Servers::Capab.insert("TOPICLOCK");
			IRCD->CanSVSHold = false;
		}
		else if (params[0].equals_cs("CHANMODES") && params.size() > 1)
		{
			spacesepstream ssep(params[1]);
			Anope::string capab;

			while (ssep.GetToken(capab))
			{
				Anope::string modename = capab.substr(0, capab.find('='));
				Anope::string modechar = capab.substr(capab.find('=') + 1);
				ChannelMode *cm = NULL;

				if (modename.equals_cs("admin"))
					cm = new ChannelModeStatus("PROTECT", modechar.length() > 1 ? modechar[1] : modechar[0], modechar.length() > 1 ? modechar[0] : 0);
				else if (modename.equals_cs("allowinvite"))
					cm = new ChannelMode("ALLINVITE", modechar[0]);
				else if (modename.equals_cs("auditorium"))
					cm = new ChannelMode("AUDITORIUM", modechar[0]);
				else if (modename.equals_cs("ban"))
					cm = new InspIRCdExtBan("BAN", modechar[0]);
				else if (modename.equals_cs("banexception"))
					cm = new InspIRCdExtBan("EXCEPT", 'e');
				else if (modename.equals_cs("blockcaps"))
					cm = new ChannelMode("BLOCKCAPS", modechar[0]);
				else if (modename.equals_cs("blockcolor"))
					cm = new ChannelMode("BLOCKCOLOR", modechar[0]);
				else if (modename.equals_cs("c_registered"))
					cm = new ChannelModeRegistered(modechar[0]);
				else if (modename.equals_cs("censor"))
					cm = new ChannelMode("FILTER", modechar[0]);
				else if (modename.equals_cs("delayjoin"))
					cm = new ChannelMode("DELAYEDJOIN", modechar[0]);
				else if (modename.equals_cs("filter"))
					cm = new ChannelModeList("FILTER", modechar[0]);
				else if (modename.equals_cs("flood"))
					cm = new ChannelModeFlood(modechar[0], true);
				else if (modename.equals_cs("founder"))
					cm = new ChannelModeStatus("OWNER", modechar.length() > 1 ? modechar[1] : modechar[0], modechar.length() > 1 ? modechar[0] : 0);
				else if (modename.equals_cs("halfop"))
					cm = new ChannelModeStatus("HALFOP", modechar.length() > 1 ? modechar[1] : modechar[0], modechar.length() > 1 ? modechar[0] : 0);
				else if (modename.equals_cs("invex"))
					cm = new InspIRCdExtBan("INVITEOVERRIDE", 'I');
				else if (modename.equals_cs("inviteonly"))
					cm = new ChannelMode("INVITE", modechar[0]);
				else if (modename.equals_cs("joinflood"))
					cm = new ChannelModeParam("JOINFLOOD", modechar[0], true);
				else if (modename.equals_cs("key"))
					cm = new ChannelModeKey(modechar[0]);
				else if (modename.equals_cs("kicknorejoin"))
					cm = new ChannelModeParam("NOREJOIN", modechar[0], true);
				else if (modename.equals_cs("limit"))
					cm = new ChannelModeParam("LIMIT", modechar[0], true);
				else if (modename.equals_cs("moderated"))
					cm = new ChannelMode("MODERATED", modechar[0]);
				else if (modename.equals_cs("nickflood"))
					cm = new ChannelModeParam("NICKFLOOD", modechar[0], true);
				else if (modename.equals_cs("noctcp"))
					cm = new ChannelMode("NOCTCP", modechar[0]);
				else if (modename.equals_cs("noextmsg"))
					cm = new ChannelMode("NOEXTERNAL", modechar[0]);
				else if (modename.equals_cs("nokick"))
					cm = new ChannelMode("NOKICK", modechar[0]);
				else if (modename.equals_cs("noknock"))
					cm = new ChannelMode("NOKNOCK", modechar[0]);
				else if (modename.equals_cs("nonick"))
					cm = new ChannelMode("NONICK", modechar[0]);
				else if (modename.equals_cs("nonotice"))
					cm = new ChannelMode("NONOTICE", modechar[0]);
				else if (modename.equals_cs("op"))
					cm = new ChannelModeStatus("OP", modechar.length() > 1 ? modechar[1] : modechar[0], modechar.length() > 1 ? modechar[0] : 0);
				else if (modename.equals_cs("operonly"))
					cm = new ChannelModeOper(modechar[0]);
				else if (modename.equals_cs("permanent"))
					cm = new ChannelMode("PERM", modechar[0]);
				else if (modename.equals_cs("private"))
					cm = new ChannelMode("PRIVATE", modechar[0]);
				else if (modename.equals_cs("redirect"))
					cm = new ChannelModeParam("REDIRECT", modechar[0], true);
				else if (modename.equals_cs("reginvite"))
					cm = new ChannelMode("REGISTEREDONLY", modechar[0]);
				else if (modename.equals_cs("regmoderated"))
					cm = new ChannelMode("REGMODERATED", modechar[0]);
				else if (modename.equals_cs("secret"))
					cm = new ChannelMode("SECRET", modechar[0]);
				else if (modename.equals_cs("sslonly"))
					cm = new ChannelMode("SSL", modechar[0]);
				else if (modename.equals_cs("stripcolor"))
					cm = new ChannelMode("STRIPCOLOR", modechar[0]);
				else if (modename.equals_cs("topiclock"))
					cm = new ChannelMode("TOPIC", modechar[0]);
				else if (modename.equals_cs("voice"))
					cm = new ChannelModeStatus("VOICE", modechar.length() > 1 ? modechar[1] : modechar[0], modechar.length() > 1 ? modechar[0] : 0);
				/* Unknown status mode, (customprefix) - add it */
				else if (modechar.length() == 2)
					cm = new ChannelModeStatus("END", modechar[1], modechar[0]);
				/* else don't do anything here, we will get it in CAPAB CAPABILITIES */

				if (cm)
					ModeManager::AddChannelMode(cm);
				else
					Log() << "Unrecognized mode string in CAPAB CHANMODES: " << capab;
			}
		}
		if (params[0].equals_cs("USERMODES") && params.size() > 1)
		{
			spacesepstream ssep(params[1]);
			Anope::string capab;

			while (ssep.GetToken(capab))
			{
				Anope::string modename = capab.substr(0, capab.find('='));
				Anope::string modechar = capab.substr(capab.find('=') + 1);
				UserMode *um = NULL;

				if (modename.equals_cs("bot"))
					um = new UserMode("BOT", modechar[0]);
				else if (modename.equals_cs("callerid"))
					um = new UserMode("CALLERID", modechar[0]);
				else if (modename.equals_cs("cloak"))
					um = new UserMode("CLOAK", modechar[0]);
				else if (modename.equals_cs("deaf"))
					um = new UserMode("DEAF", modechar[0]);
				else if (modename.equals_cs("deaf_commonchan"))
					um = new UserMode("COMMONCHANS", modechar[0]);
				else if (modename.equals_cs("helpop"))
					um = new UserMode("HELPOP", modechar[0]);
				else if (modename.equals_cs("hidechans"))
					um = new UserMode("PRIV", modechar[0]);
				else if (modename.equals_cs("hideoper"))
					um = new UserMode("HIDEOPER", modechar[0]);
				else if (modename.equals_cs("invisible"))
					um = new UserMode("INVIS", modechar[0]);
				else if (modename.equals_cs("invis-oper"))
					um = new UserMode("INVISIBLE_OPER", modechar[0]);
				else if (modename.equals_cs("oper"))
					um = new UserMode("OPER", modechar[0]);
				else if (modename.equals_cs("regdeaf"))
					um = new UserMode("REGPRIV", modechar[0]);
				else if (modename.equals_cs("servprotect"))
				{
					um = new UserMode("PROTECTED", modechar[0]);
					IRCD->DefaultPseudoclientModes += "k";
				}
				else if (modename.equals_cs("showwhois"))
					um = new UserMode("WHOIS", modechar[0]);
				else if (modename.equals_cs("u_censor"))
					um = new UserMode("FILTER", modechar[0]);
				else if (modename.equals_cs("u_registered"))
					um = new UserMode("REGISTERED", modechar[0]);
				else if (modename.equals_cs("u_stripcolor"))
					um = new UserMode("STRIPCOLOR", modechar[0]);
				else if (modename.equals_cs("wallops"))
					um = new UserMode("WALLOPS", modechar[0]);

				if (um)
					ModeManager::AddUserMode(um);
				else
					Log() << "Unrecognized mode string in CAPAB USERMODES: " << capab;
			}
		}
		else if (params[0].equals_cs("MODULES") && params.size() > 1)
		{
			spacesepstream ssep(params[1]);
			Anope::string module;

			while (ssep.GetToken(module))
			{
				if (module.equals_cs("m_svshold.so"))
					IRCD->CanSVSHold = true;
				else if (module.find("m_rline.so") == 0)
				{
					Servers::Capab.insert("RLINE");
					if (!Config->RegexEngine.empty() && module.length() > 11 && Config->RegexEngine != module.substr(11))
						Log() << "Warning: InspIRCd is using regex engine " << module.substr(11) << ", but we have " << Config->RegexEngine << ". This may cause inconsistencies.";
				}
				else if (module.equals_cs("m_topiclock.so"))
					Servers::Capab.insert("TOPICLOCK");
			}
		}
		else if (params[0].equals_cs("MODSUPPORT") && params.size() > 1)
		{
			spacesepstream ssep(params[1]);
			Anope::string module;

			while (ssep.GetToken(module))
			{
				if (module.equals_cs("m_services_account.so"))
					Servers::Capab.insert("SERVICES");
				else if (module.equals_cs("m_chghost.so"))
					Servers::Capab.insert("CHGHOST");
				else if (module.equals_cs("m_chgident.so"))
					Servers::Capab.insert("CHGIDENT");
			}
		}
		else if (params[0].equals_cs("CAPABILITIES") && params.size() > 1)
		{
			spacesepstream ssep(params[1]);
			Anope::string capab;
			while (ssep.GetToken(capab))
			{
				if (capab.find("CHANMODES") != Anope::string::npos)
				{
					Anope::string modes(capab.begin() + 10, capab.end());
					commasepstream sep(modes);
					Anope::string modebuf;

					sep.GetToken(modebuf);
					for (size_t t = 0, end = modebuf.length(); t < end; ++t)
					{
						if (ModeManager::FindChannelModeByChar(modebuf[t]))
							continue;
						ModeManager::AddChannelMode(new ChannelModeList("END", modebuf[t]));
					}

					sep.GetToken(modebuf);
					for (size_t t = 0, end = modebuf.length(); t < end; ++t)
					{
						if (ModeManager::FindChannelModeByChar(modebuf[t]))
							continue;
						ModeManager::AddChannelMode(new ChannelModeParam("END", modebuf[t]));
					}

					sep.GetToken(modebuf);
					for (size_t t = 0, end = modebuf.length(); t < end; ++t)
					{
						if (ModeManager::FindChannelModeByChar(modebuf[t]))
							continue;
						ModeManager::AddChannelMode(new ChannelModeParam("END", true));
					}

					sep.GetToken(modebuf);
					for (size_t t = 0, end = modebuf.length(); t < end; ++t)
					{
						if (ModeManager::FindChannelModeByChar(modebuf[t]))
							continue;
						ModeManager::AddChannelMode(new ChannelMode("END", modebuf[t]));
					}
				}
				else if (capab.find("USERMODES") != Anope::string::npos)
				{
					Anope::string modes(capab.begin() + 10, capab.end());
					commasepstream sep(modes);
					Anope::string modebuf;

					sep.GetToken(modebuf);
					sep.GetToken(modebuf);

					if (sep.GetToken(modebuf))
						for (size_t t = 0, end = modebuf.length(); t < end; ++t)
							ModeManager::AddUserMode(new UserModeParam("END", modebuf[t]));

					if (sep.GetToken(modebuf))
						for (size_t t = 0, end = modebuf.length(); t < end; ++t)
							ModeManager::AddUserMode(new UserMode("END", modebuf[t]));
				}
				else if (capab.find("MAXMODES=") != Anope::string::npos)
				{
					Anope::string maxmodes(capab.begin() + 9, capab.end());
					IRCD->MaxModes = maxmodes.is_pos_number_only() ? convertTo<unsigned>(maxmodes) : 3;
				}
				else if (capab.find("PREFIX=") != Anope::string::npos)
				{
					Anope::string modes(capab.begin() + 8, capab.begin() + capab.find(')'));
					Anope::string chars(capab.begin() + capab.find(')') + 1, capab.end());
					short level = modes.length() - 1;

					for (size_t t = 0, end = modes.length(); t < end; ++t)
					{
						ChannelMode *cm = ModeManager::FindChannelModeByChar(modes[t]);
						if (cm == NULL || cm->type != MODE_STATUS)
						{
							Log() << "CAPAB PREFIX gave unknown channel status mode " << modes[t];
							continue;
						}

						ChannelModeStatus *cms = anope_dynamic_static_cast<ChannelModeStatus *>(cm);
						cms->level = level--;
					}
				}
			}
		}
		else if (params[0].equals_cs("END"))
		{
			if (!Servers::Capab.count("SERVICES"))
			{
				UplinkSocket::Message() << "ERROR :m_services_account.so is not loaded. This is required by Anope";
				Anope::QuitReason = "ERROR: Remote server does not have the m_services_account module loaded, and this is required.";
				Anope::Quitting = true;
				return;
			}
			if (!ModeManager::FindUserModeByName("PRIV"))
			{
				UplinkSocket::Message() << "ERROR :m_hidechans.so is not loaded. This is required by Anope";
				Anope::QuitReason = "ERROR: Remote server does not have the m_hidechans module loaded, and this is required.";
				Anope::Quitting = true;
				return;
			}
			if (!IRCD->CanSVSHold)
				Log() << "SVSHOLD missing, Usage disabled until module is loaded.";
			if (!Servers::Capab.count("CHGHOST"))
				Log() << "CHGHOST missing, Usage disabled until module is loaded.";
			if (!Servers::Capab.count("CHGIDENT"))
				Log() << "CHGIDENT missing, Usage disabled until module is loaded.";
			if (!Servers::Capab.count("TOPICLOCK") && Config->UseServerSideTopicLock)
				Log() << "m_topiclock missing, server side topic locking disabled until module is loaded.";
		}

		Message::Capab::Run(source, params);
	}
};

struct IRCDMessageEncap : IRCDMessage
{
	IRCDMessageEncap(Module *creator) : IRCDMessage(creator, "ENCAP", 4) { SetFlag(IRCDMESSAGE_SOFT_LIMIT); }

	void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
	{
		if (Anope::Match(Me->GetSID(), params[0]) == false)
			return;

		if (params[1] == "CHGIDENT")
		{
			User *u = User::Find(params[2]);
			if (!u || u->server != Me)
				return;

			u->SetIdent(params[3]);
			UplinkSocket::Message(u) << "FIDENT " << params[3];
		}
		else if (params[1] == "CHGHOST")
		{
			User *u = User::Find(params[2]);
			if (!u || u->server != Me)
				return;

			u->SetDisplayedHost(params[3]);
			UplinkSocket::Message(u) << "FHOST " << params[3];
		}
		else if (params[1] == "CHGNAME")
		{
			User *u = User::Find(params[2]);
			if (!u || u->server != Me)
				return;

			u->SetRealname(params[3]);
			UplinkSocket::Message(u) << "FNAME " << params[3];
		}
		else if (Config->NSSASL && params[1] == "SASL" && params.size() == 6)
		{
			class InspIRCDSASLIdentifyRequest : public IdentifyRequest
			{
				Anope::string uid;

			 public:
				InspIRCDSASLIdentifyRequest(Module *m, const Anope::string &id, const Anope::string &acc, const Anope::string &pass) : IdentifyRequest(m, acc, pass), uid(id) { }

				void OnSuccess() anope_override
				{
					UplinkSocket::Message(Me) << "METADATA " << this->uid << " accountname :" << this->GetAccount();
					UplinkSocket::Message(Me) << "ENCAP " << this->uid.substr(0, 3) << " SASL " << Me->GetSID() << " " << this->uid << " D S";
				}

				void OnFail() anope_override
				{
					UplinkSocket::Message(Me) << "ENCAP " << this->uid.substr(0, 3) << " SASL " << Me->GetSID() << " " << this->uid << " " << " D F";

					Log(NickServ) << "A user failed to identify for account " << this->GetAccount() << " using SASL";
				}
			};

			/*
			Received: :869 ENCAP * SASL 869AAAAAH * S PLAIN
			Sent: :00B ENCAP 869 SASL 00B 869AAAAAH C +
			Received: :869 ENCAP * SASL 869AAAAAH 00B C QWRhbQBBZGFtAG1vbw==
			                                            base64(account\0account\0pass)
			*/
			if (params[4] == "S")
			{
				if (params[5] == "PLAIN")
					UplinkSocket::Message(Me) << "ENCAP " << params[2].substr(0, 3) << " SASL " << Me->GetSID() << " " << params[2] << " C +";
				else
					UplinkSocket::Message(Me) << "ENCAP " << params[2].substr(0, 3) << " SASL " << Me->GetSID() << " " << params[2] << " D F";
			}
			else if (params[4] == "C")
			{
				Anope::string decoded;
				Anope::B64Decode(params[5], decoded);

				size_t p = decoded.find('\0');
				if (p == Anope::string::npos)
					return;
				decoded = decoded.substr(p + 1);

				p = decoded.find('\0');
				if (p == Anope::string::npos)
					return;

				Anope::string acc = decoded.substr(0, p),
					pass = decoded.substr(p + 1);

				if (acc.empty() || pass.empty())
					return;

				IdentifyRequest *req = new InspIRCDSASLIdentifyRequest(this->owner, params[2], acc, pass);
				FOREACH_MOD(I_OnCheckAuthentication, OnCheckAuthentication(NULL, req));
				req->Dispatch();
			}
		}
	}
};

struct IRCDMessageFIdent : IRCDMessage
{
	IRCDMessageFIdent(Module *creator) : IRCDMessage(creator, "FIDENT", 1) { SetFlag(IRCDMESSAGE_REQUIRE_USER); }

	void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
	{
		source.GetUser()->SetIdent(params[0]);
	}
};

class ProtoInspIRCd : public Module
{
	Module *m_insp12;

	InspIRCd20Proto ircd_proto;

	/* Core message handlers */
	Message::Away message_away;
	Message::Error message_error;
	Message::Join message_join;
	Message::Kick message_kick;
	Message::Kill message_kill;
	Message::MOTD message_motd;
	Message::Part message_part;
	Message::Ping message_ping;
	Message::Privmsg message_privmsg;
	Message::Quit message_quit;
	Message::SQuit message_squit;
	Message::Stats message_stats;
	Message::Topic message_topic;
	Message::Version message_version;

	/* InspIRCd 1.2 message handlers */
	ServiceAlias message_endburst, message_fhost, message_fjoin, message_fmode,
				message_ftopic, message_idle, message_metadata, message_mode,
				message_nick, message_opertype, message_rsquit, message_server,
				message_time, message_uid;

	/* Our message handlers */
	IRCDMessageCapab message_capab;
	IRCDMessageEncap message_encap;
	IRCDMessageFIdent message_fident;

	void SendChannelMetadata(Channel *c, const Anope::string &metadataname, const Anope::string &value)
	{
		UplinkSocket::Message(Me) << "METADATA " << c->name << " " << metadataname << " :" << value;
	}

 public:
	ProtoInspIRCd(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, PROTOCOL),
		ircd_proto(this),
		message_away(this), message_error(this), message_join(this), message_kick(this), message_kill(this),
		message_motd(this), message_part(this), message_ping(this), message_privmsg(this), message_quit(this),
		message_squit(this), message_stats(this), message_topic(this), message_version(this),

		message_endburst("IRCDMessage", "inspircd20/endburst", "inspircd12/endburst"),
		message_fhost("IRCDMessage", "inspircd20/fhost", "inspircd12/fhost"),
		message_fjoin("IRCDMessage", "inspircd20/fjoin", "inspircd12/fjoin"),
		message_fmode("IRCDMessage", "inspircd20/fmode", "inspircd12/fmode"),
		message_ftopic("IRCDMessage", "inspircd20/ftopic", "inspircd12/ftopic"),
		message_idle("IRCDMessage", "inspircd20/idle", "inspircd12/idle"),
		message_metadata("IRCDMessage", "inspircd20/metadata", "inspircd12/metadata"),
		message_mode("IRCDMessage", "inspircd20/mode", "inspircd12/mode"),
		message_nick("IRCDMessage", "inspircd20/nick", "inspircd12/nick"),
		message_opertype("IRCDMessage", "inspircd20/opertype", "inspircd12/opertype"),
		message_rsquit("IRCDMessage", "inspircd20/rsquit", "inspircd12/rsquit"),
		message_server("IRCDMessage", "inspircd20/server", "inspircd12/server"),
		message_time("IRCDMessage", "inspircd20/time", "inspircd12/time"),
		message_uid("IRCDMessage", "inspircd20/uid", "inspircd12/uid"),

		message_capab(this), message_encap(this), message_fident(this)
	{
		this->SetAuthor("Anope");

		if (ModuleManager::LoadModule("inspircd12", User::Find(creator)) != MOD_ERR_OK)
			throw ModuleException("Unable to load inspircd12");
		m_insp12 = ModuleManager::FindModule("inspircd12");
		if (!m_insp12)
			throw ModuleException("Unable to find inspircd12");
		if (!insp12)
			throw ModuleException("No protocol interface for insp12");
		ModuleManager::DetachAll(m_insp12);

		Implementation i[] = { I_OnUserNickChange, I_OnChannelCreate, I_OnChanRegistered, I_OnDelChan, I_OnMLock, I_OnUnMLock, I_OnSetChannelOption };
		ModuleManager::Attach(i, this, sizeof(i) / sizeof(Implementation));
	}

	~ProtoInspIRCd()
	{
		ModuleManager::UnloadModule(m_insp12, NULL);
	}

	void OnUserNickChange(User *u, const Anope::string &) anope_override
	{
		u->RemoveModeInternal(ModeManager::FindUserModeByName("REGISTERED"));
	}

	void OnChannelCreate(Channel *c) anope_override
	{
		if (c->ci && (Config->UseServerSideMLock || Config->UseServerSideTopicLock))
			this->OnChanRegistered(c->ci);
	}

	void OnChanRegistered(ChannelInfo *ci) anope_override
	{
		if (Config->UseServerSideMLock && ci->c)
		{
			Anope::string modes = ci->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "");
			SendChannelMetadata(ci->c, "mlock", modes);
		}

		if (Config->UseServerSideTopicLock && Servers::Capab.count("TOPICLOCK") && ci->c)
		{
			Anope::string on = ci->HasExt("TOPICLOCK") ? "1" : "";
			SendChannelMetadata(ci->c, "topiclock", on);
		}
	}

	void OnDelChan(ChannelInfo *ci) anope_override
	{
		if (Config->UseServerSideMLock && ci->c)
			SendChannelMetadata(ci->c, "mlock", "");

		if (Config->UseServerSideTopicLock && Servers::Capab.count("TOPICLOCK") && ci->c)
			SendChannelMetadata(ci->c, "topiclock", "");
	}

	EventReturn OnMLock(ChannelInfo *ci, ModeLock *lock) anope_override
	{
		ChannelMode *cm = ModeManager::FindChannelModeByName(lock->name);
		if (cm && ci->c && (cm->type == MODE_REGULAR || cm->type == MODE_PARAM) && Config->UseServerSideMLock)
		{
			Anope::string modes = ci->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "") + cm->mchar;
			SendChannelMetadata(ci->c, "mlock", modes);
		}

		return EVENT_CONTINUE;
	}

	EventReturn OnUnMLock(ChannelInfo *ci, ModeLock *lock) anope_override
	{
		ChannelMode *cm = ModeManager::FindChannelModeByName(lock->name);
		if (cm && ci->c && (cm->type == MODE_REGULAR || cm->type == MODE_PARAM) && Config->UseServerSideMLock)
		{
			Anope::string modes = ci->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "").replace_all_cs(cm->mchar, "");
			SendChannelMetadata(ci->c, "mlock", modes);
		}

		return EVENT_CONTINUE;
	}

	EventReturn OnSetChannelOption(CommandSource &source, Command *cmd, ChannelInfo *ci, const Anope::string &setting) anope_override
	{
		if (cmd->name == "chanserv/set/topiclock" && ci->c)
			SendChannelMetadata(ci->c, "topiclock", setting.equals_ci("ON") ? "1" : "");

		return EVENT_CONTINUE;
	}
};

MODULE_INIT(ProtoInspIRCd)