Shuffle the modules about a bit.

1 files changed, 0 insertions, 566 deletions

diff --git a/src/modules/m_gateway.cpp b/src/modules/m_gateway.cpp
deleted file mode 100644
index 00d2b7cfb..000000000
--- a/src/modules/m_gateway.cpp
+++ /dev/null
@@ -1,566 +0,0 @@
-/*
- * InspIRCd -- Internet Relay Chat Daemon
- *
- *   Copyright (C) 2021 Dominic Hamon
- *   Copyright (C) 2017-2024 Sadie Powell <sadie@witchery.services>
- *   Copyright (C) 2014 md_5 <git@md-5.net>
- *   Copyright (C) 2014 Googolplexed <googol@googolplexed.net>
- *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
- *   Copyright (C) 2012 Attila Molnar <attilamolnar@hush.com>
- *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
- *   Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
- *   Copyright (C) 2007-2009 Robin Burchell <robin+git@viroteck.net>
- *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
- *   Copyright (C) 2006-2007, 2010 Craig Edwards <brain@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 "extension.h"
-#include "modules/extban.h"
-#include "modules/ssl.h"
-#include "modules/webirc.h"
-#include "modules/whois.h"
-
-// One or more hostmask globs or CIDR ranges.
-typedef std::vector<std::string> MaskList;
-
-// Encapsulates information about a username gateway.
-class UserHost final
-{
-private:
-	MaskList hostmasks;
-	std::string newuser;
-
-public:
-	UserHost(const MaskList& masks, const std::string& user)
-		: hostmasks(masks)
-		, newuser(user)
-	{
-	}
-
-	const std::string& GetUser() const
-	{
-		return newuser;
-	}
-
-	bool Matches(LocalUser* user) const
-	{
-		for (const auto& mask : hostmasks)
-		{
-			// Does the user's hostname match this hostmask?
-			if (InspIRCd::Match(user->GetRealHost(), mask, ascii_case_insensitive_map))
-				return true;
-
-			// Does the user's IP address match this hostmask?
-			if (InspIRCd::MatchCIDR(user->GetAddress(), mask, ascii_case_insensitive_map))
-				return true;
-		}
-
-		// The user didn't match any hostmasks.
-		return false;
-	}
-};
-
-// Encapsulates information about a WebIRC gateway.
-class WebIRCHost final
-{
-private:
-	MaskList hostmasks;
-	std::string fingerprint;
-	std::string password;
-	std::string passhash;
-	TokenList trustedflags;
-
-public:
-	WebIRCHost(const MaskList& masks, const std::string& fp, const std::string& pass, const std::string& hash, const std::string& flags)
-		: hostmasks(masks)
-		, fingerprint(fp)
-		, password(pass)
-		, passhash(hash)
-		, trustedflags(flags)
-	{
-	}
-
-	bool IsFlagTrusted(const std::string& flag) const
-	{
-		return trustedflags.Contains(flag);
-	}
-
-	bool Matches(LocalUser* user, const std::string& pass, UserCertificateAPI& sslapi) const
-	{
-		// Did the user send a valid password?
-		if (!password.empty() && !InspIRCd::CheckPassword(password, passhash, pass))
-			return false;
-
-		// Does the user have a valid fingerprint?
-		if (!fingerprint.empty())
-		{
-			if (!sslapi)
-				return false;
-
-			bool okay = false;
-			for (const auto& fp : sslapi->GetFingerprints(user))
-			{
-				if (InspIRCd::TimingSafeCompare(fp, fingerprint))
-				{
-					okay = true;
-					break;
-				}
-			}
-
-			if (!okay)
-				return false;
-		}
-
-		for (const auto& mask : hostmasks)
-		{
-			// Does the user's hostname match this hostmask?
-			if (InspIRCd::Match(user->GetRealHost(), mask, ascii_case_insensitive_map))
-				return true;
-
-			// Does the user's IP address match this hostmask?
-			if (InspIRCd::MatchCIDR(user->GetAddress(), mask, ascii_case_insensitive_map))
-				return true;
-		}
-
-		// The user didn't match any hostmasks.
-		return false;
-	}
-};
-
-class CommandHexIP final
-	: public SplitCommand
-{
-public:
-	CommandHexIP(Module* Creator)
-		: SplitCommand(Creator, "HEXIP", 1)
-	{
-		penalty = 2000;
-		syntax = { "<hex-ip|raw-ip>" };
-	}
-
-	CmdResult HandleLocal(LocalUser* user, const Params& parameters) override
-	{
-		irc::sockets::sockaddrs sa(false);
-		if (sa.from_ip(parameters[0]))
-		{
-			if (sa.family() != AF_INET)
-			{
-				user->WriteNotice("*** HEXIP: You can only hex encode an IPv4 address!");
-				return CmdResult::FAILURE;
-			}
-
-			uint32_t addr = sa.in4.sin_addr.s_addr;
-			user->WriteNotice(fmt::format("*** HEXIP: {} encodes to {:02x}{:02x}{:02x}{:02x}.",
-				sa.addr(), (addr & 0xFF), ((addr >> 8) & 0xFF), ((addr >> 16) & 0xFF),
-				((addr >> 24) & 0xFF)));
-			return CmdResult::SUCCESS;
-		}
-
-		if (ParseIP(parameters[0], sa))
-		{
-			user->WriteNotice(fmt::format("*** HEXIP: {} decodes to {}.", parameters[0], sa.addr()));
-			return CmdResult::SUCCESS;
-		}
-
-		user->WriteNotice(fmt::format("*** HEXIP: {} is not a valid raw or hex encoded IPv4 address.",
-			parameters[0]));
-		return CmdResult::FAILURE;
-	}
-
-	static bool ParseIP(const std::string& in, irc::sockets::sockaddrs& out)
-	{
-		const char* username = nullptr;
-		if (in.length() == 8)
-		{
-			// The username is an IPv4 address encoded in hexadecimal with two characters
-			// per address segment.
-			username = in.c_str();
-		}
-		else if (in.length() == 9 && in[0] == '~')
-		{
-			// The same as above but m_ident got to this user before we did. Strip the
-			// username prefix and continue as normal.
-			username = in.c_str() + 1;
-		}
-		else
-		{
-			// The user either does not have an IPv4 in their username or the gateway server
-			// is also running an identd. In the latter case there isn't really a lot we
-			// can do so we just assume that the client in question is not connecting via
-			// a username gateway.
-			return false;
-		}
-
-		// Try to convert the IP address to a string. If this fails then the user
-		// does not have an IPv4 address in their username.
-		errno = 0;
-		unsigned long address = strtoul(username, nullptr, 16);
-		if (errno)
-			return false;
-
-		// If the converted IP address is > 32 bits then it's not valid so bail.
-		if (address > UINT32_MAX)
-			return false;
-
-		out.in4.sin_family = AF_INET;
-		out.in4.sin_addr.s_addr = htonl(uint32_t(address));
-		return true;
-	}
-};
-
-class GatewayExtBan final
-	: public ExtBan::MatchingBase
-{
-public:
-	StringExtItem gateway;
-
-	GatewayExtBan(Module* Creator)
-		: ExtBan::MatchingBase(Creator, "gateway", 'w')
-		, gateway(Creator, "webirc-gateway", ExtensionType::USER, true)
-	{
-	}
-
-	bool IsMatch(User* user, Channel* channel, const std::string& text) override
-	{
-		const std::string* gatewayname = gateway.Get(user);
-		return gatewayname ? InspIRCd::Match(*gatewayname, text) : false;
-	}
-};
-
-class CommandWebIRC final
-	: public SplitCommand
-{
-public:
-	std::vector<WebIRCHost> hosts;
-	GatewayExtBan extban;
-	StringExtItem realhost;
-	StringExtItem realip;
-	UserCertificateAPI sslapi;
-	Events::ModuleEventProvider webircevprov;
-
-	CommandWebIRC(Module* Creator)
-		: SplitCommand(Creator, "WEBIRC", 4)
-		, extban(Creator)
-		, realhost(Creator, "gateway-realhost", ExtensionType::USER, true)
-		, realip(Creator, "gateway-realip", ExtensionType::USER, true)
-		, sslapi(Creator)
-		, webircevprov(Creator, "event/webirc")
-	{
-		works_before_reg = true;
-		syntax = { "<password> <gateway> <hostname> <ip> [<flags>]" };
-	}
-
-	CmdResult HandleLocal(LocalUser* user, const Params& parameters) override
-	{
-		if (user->IsFullyConnected() || realhost.Get(user))
-			return CmdResult::FAILURE;
-
-		for (const auto& host : hosts)
-		{
-			// If we don't match the host then skip to the next host.
-			if (!host.Matches(user, parameters[0], sslapi))
-				continue;
-
-			irc::sockets::sockaddrs ipaddr(false);
-			if (!ipaddr.from_ip_port(parameters[3], user->client_sa.port()))
-			{
-				ServerInstance->SNO.WriteGlobalSno('w', "Connecting user {} ({}) tried to use WEBIRC but gave an invalid IP address.",
-					user->uuid, user->GetAddress());
-				ServerInstance->Users.QuitUser(user, "WEBIRC: IP address is invalid: " + parameters[3]);
-				return CmdResult::FAILURE;
-			}
-
-			// The user matched a WebIRC block!
-			extban.gateway.Set(user, parameters[1]);
-			realhost.Set(user, user->GetRealHost());
-			realip.Set(user, user->GetAddress());
-
-			ServerInstance->SNO.WriteGlobalSno('w', "Connecting user {} is using the {} WebIRC gateway; changing their IP from {} to {}.",
-				user->uuid, parameters[1], user->GetAddress(), parameters[3]);
-
-			// If we have custom flags then deal with them.
-			WebIRC::FlagMap flags;
-			const bool hasflags = (parameters.size() > 4);
-			if (hasflags)
-			{
-				std::string flagname;
-				std::string flagvalue;
-
-				// Parse the flags.
-				irc::spacesepstream flagstream(parameters[4]);
-				for (std::string flag; flagstream.GetToken(flag); )
-				{
-					// Does this flag have a value?
-					const size_t separator = flag.find('=');
-					if (separator == std::string::npos)
-					{
-						// It does not; just use the flag.
-						flagname = flag;
-						flagvalue.clear();
-					}
-					else
-					{
-						// It does; extract the value.
-						flagname = flag.substr(0, separator);
-						flagvalue = flag.substr(separator + 1);
-					}
-
-					if (host.IsFlagTrusted(flagname))
-						flags[flagname] = flagvalue;
-				}
-			}
-
-			// Inform modules about the WebIRC attempt.
-			webircevprov.Call(&WebIRC::EventListener::OnWebIRCAuth, user, (hasflags ? &flags : nullptr));
-
-			// Set the IP address sent via WEBIRC. We ignore the hostname and lookup
-			// instead do our own DNS lookups because of unreliable gateways.
-			user->ChangeRemoteAddress(ipaddr);
-			return CmdResult::SUCCESS;
-		}
-
-		ServerInstance->SNO.WriteGlobalSno('w', "Connecting user {} ({}) tried to use WEBIRC but didn't match any configured WebIRC hosts.",
-			user->uuid, user->GetAddress());
-		ServerInstance->Users.QuitUser(user, "WEBIRC: you don't match any configured WebIRC hosts.");
-		return CmdResult::FAILURE;
-	}
-};
-
-class ModuleGateway final
-	: public Module
-	, public WebIRC::EventListener
-	, public Whois::EventListener
-{
-private:
-	CommandHexIP cmdhexip;
-	CommandWebIRC cmdwebirc;
-	std::vector<UserHost> hosts;
-
-public:
-	ModuleGateway()
-		: Module(VF_VENDOR, "Adds the ability for IRC gateways to forward the real IP address of users connecting through them.")
-		, WebIRC::EventListener(this)
-		, Whois::EventListener(this)
-		, cmdhexip(this)
-		, cmdwebirc(this)
-	{
-	}
-
-	void init() override
-	{
-		ServerInstance->SNO.EnableSnomask('w', "GATEWAY");
-	}
-
-	void ReadConfig(ConfigStatus& status) override
-	{
-		std::vector<UserHost> userhosts;
-		std::vector<WebIRCHost> webirchosts;
-
-		for (const auto& [_, tag] : ServerInstance->Config->ConfTags("gateway", ServerInstance->Config->ConfTags("cgihost")))
-		{
-			MaskList masks;
-			irc::spacesepstream maskstream(tag->getString("mask"));
-			for (std::string mask; maskstream.GetToken(mask); )
-				masks.push_back(mask);
-
-			// Ensure that we have the <gateway:mask> parameter.
-			if (masks.empty())
-				throw ModuleException(this, "<" + tag->name + ":mask> is a mandatory field, at " + tag->source.str());
-
-			// Determine what lookup type this host uses.
-			const std::string type = tag->getString("type");
-			if (insp::equalsci(type, "username") || insp::equalsci(type, "ident"))
-			{
-				// The IP address should be looked up from the hex IP address.
-				const std::string newuser = tag->getString("newusername", "gateway", ServerInstance->IsUser);
-				userhosts.emplace_back(masks, newuser);
-			}
-			else if (insp::equalsci(type, "webirc"))
-			{
-				// The IP address will be received via the WEBIRC command.
-				const std::string fingerprint = tag->getString("fingerprint");
-				const std::string password = tag->getString("password");
-				const std::string passwordhash = tag->getString("hash", "plaintext", 1);
-				const std::string trustedflags = tag->getString("trustedflags", "*", 1);
-
-				// WebIRC blocks require a password.
-				if (fingerprint.empty() && password.empty())
-					throw ModuleException(this, "When using <" + tag->name + " type=\"webirc\"> either the fingerprint or password field is required, at " + tag->source.str());
-
-				if (!password.empty() && insp::equalsci(passwordhash, "plaintext"))
-				{
-					ServerInstance->Logs.Normal(MODNAME, "<{}> tag at {} contains an plain text password, this is insecure!",
-						tag->name, tag->source.str());
-				}
-
-				webirchosts.emplace_back(masks, fingerprint, password, passwordhash, trustedflags);
-			}
-			else
-			{
-				throw ModuleException(this, type + " is an invalid <" + tag->name + ":mask> type, at " + tag->source.str());
-			}
-		}
-
-		// The host configuration was valid so we can apply it.
-		hosts.swap(userhosts);
-		cmdwebirc.hosts.swap(webirchosts);
-	}
-
-	ModResult OnPreChangeConnectClass(LocalUser* user, const std::shared_ptr<ConnectClass>& klass, std::optional<Numeric::Numeric>& errnum) override
-	{
-		// If <connect:webirc> is not set then we have nothing to do.
-		const std::string webirc = klass->config->getString("webirc");
-		if (webirc.empty())
-			return MOD_RES_PASSTHRU;
-
-		// If the user is not connecting via a WebIRC gateway then they
-		// cannot match this connect class.
-		const std::string* gateway = cmdwebirc.extban.gateway.Get(user);
-		if (!gateway)
-		{
-			ServerInstance->Logs.Debug("CONNECTCLASS", "The {} connect class is not suitable as it requires a connection via a WebIRC gateway.",
-				klass->GetName());
-			return MOD_RES_DENY;
-		}
-
-		// If the gateway matches the <connect:webirc> constraint then
-		// allow the check to continue. Otherwise, reject it.
-		if (!InspIRCd::Match(*gateway, webirc))
-		{
-			ServerInstance->Logs.Debug("CONNECTCLASS", "The {} connect class is not suitable as the WebIRC gateway name ({}) does not match {}.",
-				klass->GetName(), *gateway, webirc);
-			return MOD_RES_DENY;
-		}
-
-		return MOD_RES_PASSTHRU;
-	}
-
-	ModResult OnUserRegister(LocalUser* user) override
-	{
-		// There is no need to check for gateways if one is already being used.
-		if (cmdwebirc.realhost.Get(user))
-			return MOD_RES_PASSTHRU;
-
-		for (const auto& host : hosts)
-		{
-			// If we don't match the host then skip to the next host.
-			if (!host.Matches(user))
-				continue;
-
-			// We have matched an gateway block! Try to parse the encoded IPv4 address
-			// out of the user.
-			irc::sockets::sockaddrs address(user->client_sa);
-			if (!CommandHexIP::ParseIP(user->GetRealUser(), address))
-				return MOD_RES_PASSTHRU;
-
-			// Store the hostname and IP of the gateway for later use.
-			cmdwebirc.realhost.Set(user, user->GetRealHost());
-			cmdwebirc.realip.Set(user, user->GetAddress());
-
-			const std::string& newuser = host.GetUser();
-			ServerInstance->SNO.WriteGlobalSno('w', "Connecting user {} is using a username gateway; changing their IP from {} to {} and their real username from {} to {}.",
-				user->uuid, user->GetAddress(), address.addr(), user->GetRealUser(), newuser);
-
-			user->ChangeRealUser(newuser, user->GetDisplayedUser() == user->GetRealUser());
-			user->ChangeRemoteAddress(address);
-			break;
-		}
-		return MOD_RES_PASSTHRU;
-	}
-
-	void OnWebIRCAuth(LocalUser* user, const WebIRC::FlagMap* flags) override
-	{
-		// We are only interested in connection flags. If none have been
-		// given then we have nothing to do.
-		if (!flags)
-			return;
-
-		WebIRC::FlagMap::const_iterator cport = flags->find("remote-port");
-		if (cport != flags->end())
-		{
-			// If we can't parse the port then just give up.
-			in_port_t port = ConvToNum<in_port_t>(cport->second);
-			if (port)
-			{
-				switch (user->client_sa.family())
-				{
-					case AF_INET:
-						user->client_sa.in4.sin_port = htons(port);
-						break;
-
-					case AF_INET6:
-						user->client_sa.in6.sin6_port = htons(port);
-						break;
-
-					default:
-						// If we have reached this point then we have encountered a bug.
-						ServerInstance->Logs.Debug(MODNAME, "BUG: OnWebIRCAuth({}): socket type {} is unknown!",
-							user->uuid, user->client_sa.family());
-						return;
-				}
-			}
-		}
-
-		WebIRC::FlagMap::const_iterator sport = flags->find("local-port");
-		if (sport != flags->end())
-		{
-			// If we can't parse the port then just give up.
-			in_port_t port = ConvToNum<in_port_t>(sport->second);
-			if (port)
-			{
-				switch (user->server_sa.family())
-				{
-					case AF_INET:
-						user->server_sa.in4.sin_port = htons(port);
-						break;
-
-					case AF_INET6:
-						user->server_sa.in6.sin6_port = htons(port);
-						break;
-
-					default:
-						// If we have reached this point then we have encountered a bug.
-						ServerInstance->Logs.Debug(MODNAME, "BUG: OnWebIRCAuth({}): socket type {} is unknown!",
-							user->uuid, user->server_sa.family());
-						return;
-				}
-			}
-		}
-	}
-
-	void OnWhois(Whois::Context& whois) override
-	{
-		// If these fields are not set then the client is not using a gateway.
-		std::string* realhost = cmdwebirc.realhost.Get(whois.GetTarget());
-		std::string* realip = cmdwebirc.realip.Get(whois.GetTarget());
-		if (!realhost || !realip)
-			return;
-
-		// If the source doesn't have the right privs then only show the gateway name.
-		std::string hidden = "*";
-		if (!whois.GetSource()->HasPrivPermission("users/auspex"))
-			realhost = realip = &hidden;
-
-		const std::string* gateway = cmdwebirc.extban.gateway.Get(whois.GetTarget());
-		if (gateway)
-			whois.SendLine(RPL_WHOISGATEWAY, *realhost, *realip, "is connected via the " + *gateway + " WebIRC gateway");
-		else
-			whois.SendLine(RPL_WHOISGATEWAY, *realhost, *realip, "is connected via a username gateway");
-	}
-};
-
-MODULE_INIT(ModuleGateway)