1 files changed, 74 insertions, 0 deletions
diff --git a/modules/restrictmsg.cpp b/modules/restrictmsg.cpp
new file mode 100644
index 000000000..624417e5e
--- /dev/null
+++ b/modules/restrictmsg.cpp
@@ -0,0 +1,74 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2017, 2019-2024 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2005-2006 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"
+#include "modules/ctctags.h"
+#include "numerichelper.h"
+
+class ModuleRestrictMsg final
+	: public Module
+	, public CTCTags::EventListener
+{
+private:
+	static ModResult HandleMessage(User* user, const MessageTarget& target)
+	{
+		if ((target.type == MessageTarget::TYPE_USER) && (IS_LOCAL(user)))
+		{
+			const auto* u = target.Get<User>();
+
+			// message allowed if:
+			// (1) the sender is opered
+			// (2) the recipient is opered
+			// (3) the recipient is on a services server
+			// anything else, blocked.
+			if (u->IsOper() || user->IsOper() || u->server->IsService())
+				return MOD_RES_PASSTHRU;
+
+			user->WriteNumeric(Numerics::CannotSendTo(u, "You cannot send messages to this user."));
+			return MOD_RES_DENY;
+		}
+
+		// however, we must allow channel messages...
+		return MOD_RES_PASSTHRU;
+	}
+
+public:
+	ModuleRestrictMsg()
+		: Module(VF_VENDOR, "Prevents users who are not server operators from messaging each other.")
+		, CTCTags::EventListener(this)
+	{
+	}
+
+	ModResult OnUserPreMessage(User* user, MessageTarget& target, MessageDetails& details) override
+	{
+		return HandleMessage(user, target);
+	}
+
+	ModResult OnUserPreTagMessage(User* user, MessageTarget& target, CTCTags::TagMessageDetails& details) override
+	{
+		return HandleMessage(user, target);
+	}
+};
+
+MODULE_INIT(ModuleRestrictMsg)