From 889d521e05f2e922683d48c74eb00290e7a2f548 Mon Sep 17 00:00:00 2001
From: Sadie Powell
Date: Wed, 17 Jul 2024 00:06:50 +0100
Subject: Shuffle the modules about a bit.

---
 modules/sethost.cpp | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 modules/sethost.cpp

(limited to 'modules/sethost.cpp')

diff --git a/modules/sethost.cpp b/modules/sethost.cpp
new file mode 100644
index 000000000..1cd6343bc
--- /dev/null
+++ b/modules/sethost.cpp
@@ -0,0 +1,100 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2013, 2017, 2019-2023 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012-2013 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006 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"
+
+class CommandSethost final
+	: public Command
+{
+public:
+	CharState hostmap;
+
+	CommandSethost(Module* Creator)
+		: Command(Creator, "SETHOST", 1)
+	{
+		access_needed = CmdAccess::OPERATOR;
+		syntax = { "<host>" };
+	}
+
+	CmdResult Handle(User* user, const Params& parameters) override
+	{
+		if (parameters[0].length() > ServerInstance->Config->Limits.MaxHost)
+		{
+			user->WriteNotice("*** SETHOST: Host too long");
+			return CmdResult::FAILURE;
+		}
+
+		for (const auto chr : parameters[0])
+		{
+			if (!hostmap.test(static_cast<unsigned char>(chr)))
+			{
+				user->WriteNotice("*** SETHOST: Invalid characters in hostname");
+				return CmdResult::FAILURE;
+			}
+		}
+
+		user->ChangeDisplayedHost(parameters[0]);
+		ServerInstance->SNO.WriteGlobalSno('a', user->nick+" used SETHOST to change their displayed host to "+user->GetDisplayedHost());
+		return CmdResult::SUCCESS;
+	}
+};
+
+class ModuleSetHost final
+	: public Module
+{
+private:
+	CommandSethost cmd;
+
+public:
+	ModuleSetHost()
+		: Module(VF_VENDOR, "Adds the /SETHOST command which allows server operators to change their displayed hostname.")
+		, cmd(this)
+	{
+	}
+
+	void ReadConfig(ConfigStatus& status) override
+	{
+		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, fmt::format("<hostname:charmap> can not contain character 0x{:02X} ({})", chr, chr));
+			newhostmap.set(static_cast<unsigned char>(chr));
+		}
+		std::swap(newhostmap, cmd.hostmap);
+	}
+
+	void GetLinkData(Module::LinkData& data, std::string& compatdata) override
+	{
+		for (size_t i = 0; i < cmd.hostmap.size(); ++i)
+			if (cmd.hostmap[i])
+				data["hostchars"].push_back(static_cast<unsigned char>(i));
+	}
+};
+
+MODULE_INIT(ModuleSetHost)
-- 
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