Remove the now-obsolete hostchange module.

Closes #2025.

2 files changed, 0 insertions, 270 deletions

diff --git a/src/modules/m_dnsbl.cpp b/src/modules/m_dnsbl.cpp
index 99336922c..2992a7bcc 100644
--- a/src/modules/m_dnsbl.cpp
+++ b/src/modules/m_dnsbl.cpp
@@ -425,9 +425,6 @@ public:
 	{
 		Module* corexline = ServerInstance->Modules.Find("core_xline");
 		ServerInstance->Modules.SetPriority(this, I_OnChangeRemoteAddress, PRIORITY_AFTER, corexline);
-
-		Module* hostchange = ServerInstance->Modules.Find("hostchange");
-		ServerInstance->Modules.SetPriority(this, I_OnUserConnect, PRIORITY_BEFORE, hostchange);
 	}
 
 	void ReadConfig(ConfigStatus& status) override
diff --git a/src/modules/m_hostchange.cpp b/src/modules/m_hostchange.cpp
deleted file mode 100644
index 6efab2b20..000000000
--- a/src/modules/m_hostchange.cpp
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * InspIRCd -- Internet Relay Chat Daemon
- *
- *   Copyright (C) 2013, 2018-2021 Sadie Powell <sadie@witchery.services>
- *   Copyright (C) 2012-2014 Attila Molnar <attilamolnar@hush.com>
- *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
- *   Copyright (C) 2009 Robin Burchell <robin+git@viroteck.net>
- *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
- *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
- *   Copyright (C) 2005-2007 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 "modules/account.h"
-
-// Holds information about a <hostchange> rule.
-class HostRule final
-{
-public:
-	enum class HostChangeAction
-		: uint8_t
-	{
-		// Add the user's account name to their hostname.
-		ADD_ACCOUNT,
-
-		// Add the user's nickname to their hostname.
-		ADD_NICK,
-
-		// Set the user's hostname to the specific value.
-		SET,
-	};
-
-private:
-	HostChangeAction action;
-	std::string host;
-	std::string klass;
-	std::string mask;
-	insp::flat_set<in_port_t> ports;
-	std::string prefix;
-	std::string suffix;
-
-	void ReadConfig(const std::shared_ptr<ConfigTag>& tag)
-	{
-		// Parse <hostchange:class>.
-		klass = tag->getString("class");
-
-		// Parse <hostchange:port>.
-		const std::string portlist = tag->getString("ports");
-		if (!portlist.empty())
-		{
-			irc::portparser portrange(portlist, false);
-			while (long port = portrange.GetToken())
-			{
-				if (port > std::numeric_limits<in_port_t>::min() && port <= std::numeric_limits<in_port_t>::max())
-					ports.insert(static_cast<in_port_t>(port));
-			}
-		}
-	}
-
-public:
-	HostRule(const std::shared_ptr<ConfigTag>& tag, const std::string& Mask, const std::string& Host)
-		: action(HostChangeAction::SET)
-		, host(Host)
-		, mask(Mask)
-	{
-		ReadConfig(tag);
-	}
-
-	HostRule(const std::shared_ptr<ConfigTag>& tag, HostChangeAction Action, const std::string& Mask, const std::string& Prefix, const std::string& Suffix)
-		: action(Action)
-		, mask(Mask)
-		, prefix(Prefix)
-		, suffix(Suffix)
-	{
-		ReadConfig(tag);
-	}
-
-	HostChangeAction GetAction() const
-	{
-		return action;
-	}
-
-	const std::string& GetHost() const
-	{
-		return host;
-	}
-
-	bool Matches(LocalUser* user) const
-	{
-		if (!klass.empty() && !stdalgo::string::equalsci(klass, user->GetClass()->GetName()))
-			return false;
-
-		if (!ports.empty() && !ports.count(user->server_sa.port()))
-			return false;
-
-		if (InspIRCd::MatchCIDR(user->GetRealUserHost(), mask))
-			return true;
-
-		return InspIRCd::MatchCIDR(user->GetUserAddress(), mask);
-	}
-
-	void Wrap(const std::string& value, std::string& out) const
-	{
-		if (!prefix.empty())
-			out.append(prefix);
-
-		out.append(value);
-
-		if (!suffix.empty())
-			out.append(suffix);
-	}
-};
-
-typedef std::vector<HostRule> HostRules;
-
-class ModuleHostChange final
-	: public Module
-{
-private:
-	Account::API accountapi;
-	CharState hostmap;
-	HostRules hostrules;
-
-	std::string CleanName(const std::string& name)
-	{
-		std::string buffer;
-		buffer.reserve(name.length());
-		for (const auto chr : name)
-		{
-			if (hostmap.test(static_cast<unsigned char>(chr)))
-				buffer.push_back(chr);
-		}
-		return buffer;
-	}
-
-public:
-	ModuleHostChange()
-		: Module(VF_VENDOR, "Allows the server administrator to define custom rules for applying hostnames to users.")
-		, accountapi(this)
-	{
-	}
-
-	void ReadConfig(ConfigStatus& status) override
-	{
-		HostRules rules;
-
-		for (const auto& [_, tag] : ServerInstance->Config->ConfTags("hostchange"))
-		{
-			// Ensure that we have the <hostchange:mask> parameter.
-			const std::string mask = tag->getString("mask");
-			if (mask.empty())
-				throw ModuleException(this, "<hostchange:mask> is a mandatory field, at " + tag->source.str());
-
-			// Determine what type of host rule this is.
-			const std::string action = tag->getString("action");
-			if (stdalgo::string::equalsci(action, "addaccount"))
-			{
-				// The hostname is in the format [prefix]<account>[suffix].
-				rules.emplace_back(tag, HostRule::HostChangeAction::ADD_ACCOUNT, mask, tag->getString("prefix"), tag->getString("suffix"));
-			}
-			else if (stdalgo::string::equalsci(action, "addnick"))
-			{
-				// The hostname is in the format [prefix]<nick>[suffix].
-				rules.emplace_back(tag, HostRule::HostChangeAction::ADD_NICK, mask, tag->getString("prefix"), tag->getString("suffix"));
-			}
-			else if (stdalgo::string::equalsci(action, "set"))
-			{
-				// Ensure that we have the <hostchange:value> parameter.
-				const std::string value = tag->getString("value");
-				if (value.empty())
-					throw ModuleException(this, "<hostchange:value> is a mandatory field when using the 'set' action, at " + tag->source.str());
-
-				// The hostname is in the format <value>.
-				rules.emplace_back(tag, mask, value);
-				continue;
-			}
-			else
-			{
-				throw ModuleException(this, action + " is an invalid <hostchange:action> type, at " + tag->source.str());
-			}
-		}
-
-		const auto& tag = ServerInstance->Config->ConfValue("hostname");
-		const std::string hmap = tag->getString("charmap", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-_/0123456789", 1);
-
-		CharState newhostmap;
-		for (const auto chr : hmap)
-		{
-			// A hostname can not contain NUL, LF, CR, or SPACE.
-			if (chr == 0x00 || chr == 0x0A || chr == 0x0D || chr == 0x20)
-				throw ModuleException(this, INSP_FORMAT("<hostname:charmap> can not contain character 0x{:02X} ({})", chr, chr));
-			newhostmap.set(static_cast<unsigned char>(chr));
-		}
-		std::swap(newhostmap, hostmap);
-		hostrules.swap(rules);
-	}
-
-	void OnUserConnect(LocalUser* user) override
-	{
-		for (const auto& rule : hostrules)
-		{
-			if (!rule.Matches(user))
-				continue;
-
-			std::string newhost;
-			if (rule.GetAction() == HostRule::HostChangeAction::ADD_ACCOUNT)
-			{
-				// Retrieve the account name.
-				const std::string* accountptr = accountapi ? accountapi->GetAccountName(user) : nullptr;
-				if (!accountptr)
-					continue;
-
-				// Remove invalid hostname characters.
-				std::string accountname = CleanName(*accountptr);
-				if (accountname.empty())
-					continue;
-
-				// Create the hostname.
-				rule.Wrap(accountname, newhost);
-			}
-			else if (rule.GetAction() == HostRule::HostChangeAction::ADD_NICK)
-			{
-				// Remove invalid hostname characters.
-				const std::string nickname = CleanName(user->nick);
-				if (nickname.empty())
-					continue;
-
-				// Create the hostname.
-				rule.Wrap(nickname, newhost);
-			}
-			else if (rule.GetAction() == HostRule::HostChangeAction::SET)
-			{
-				newhost.assign(rule.GetHost());
-			}
-
-			if (!newhost.empty())
-			{
-				user->WriteNotice("Setting your virtual host: " + newhost);
-				if (!user->ChangeDisplayedHost(newhost))
-					user->WriteNotice("Could not set your virtual host: " + newhost);
-				return;
-			}
-		}
-	}
-
-	void GetLinkData(Module::LinkData& data, std::string& compatdata) override
-	{
-		for (size_t i = 0; i < hostmap.size(); ++i)
-			if (hostmap[i])
-				data["hostchars"].push_back(static_cast<unsigned char>(i));
-	}
-};
-
-MODULE_INIT(ModuleHostChange)