From 0378d0f5826cfcd506595e60a44bf4af89d78bf8 Mon Sep 17 00:00:00 2001
From: Peter Powell <petpow@saberuk.com>
Date: Sat, 28 Jul 2018 09:23:14 +0100
Subject: [PATCH] Merge m_noctcp_user into m_noctcp.

---
 docs/conf/modules.conf.example |  8 ++++++--
 src/modules/m_noctcp.cpp       | 37 ++++++++++++++++++++++++++++------
 2 files changed, 37 insertions(+), 8 deletions(-)

diff --git a/docs/conf/modules.conf.example b/docs/conf/modules.conf.example
index 9ee8bf819..7823e2d30 100644
--- a/docs/conf/modules.conf.example
+++ b/docs/conf/modules.conf.example
@@ -1340,9 +1340,13 @@
 #<module name="nicklock">
 
 #-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
-# No CTCP module: Adds the channel mode +C to block CTCPs and extban
-# 'C' to block CTCPs sent by specific users.
+# No CTCP module: Adds the channel mode +C and user mode +T to block
+# CTCPs and extban 'C' to block CTCPs sent by specific users.
 #<module name="noctcp">
+#
+# The +T user mode is not enabled by default to enable link compatibility
+# with 2.0 servers. You can enable it by uncommenting this:
+#<noctcp enableumode="yes">
 
 #-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#-#
 # No kicks module: Adds the +Q channel mode and the Q: extban to deny
diff --git a/src/modules/m_noctcp.cpp b/src/modules/m_noctcp.cpp
index 54960a88e..af14c73ec 100644
--- a/src/modules/m_noctcp.cpp
+++ b/src/modules/m_noctcp.cpp
@@ -22,31 +22,47 @@
 #include "inspircd.h"
 #include "modules/exemption.h"
 
+class NoCTCPUser : public SimpleUserModeHandler
+{
+public:
+	NoCTCPUser(Module* Creator)
+		: SimpleUserModeHandler(Creator, "u_noctcp", 'T')
+	{
+		if (!ServerInstance->Config->ConfValue("noctcp")->getBool("enableumode"))
+			DisableAutoRegister();
+	}
+};
+
 class ModuleNoCTCP : public Module
 {
 	CheckExemption::EventProvider exemptionprov;
 	SimpleChannelModeHandler nc;
+	NoCTCPUser ncu;
 
  public:
 	ModuleNoCTCP()
 		: exemptionprov(this)
 		, nc(this, "noctcp", 'C')
+		, ncu(this)
 	{
 	}
 
 	Version GetVersion() CXX11_OVERRIDE
 	{
-		return Version("Provides channel mode +C to block CTCPs", VF_VENDOR);
+		return Version("Provides user mode +T and channel mode +C to block CTCPs", VF_VENDOR);
 	}
 
 	ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE
 	{
-		if ((target.type == MessageTarget::TYPE_CHANNEL) && (IS_LOCAL(user)))
-		{
-			std::string ctcpname;
-			if (!details.IsCTCP(ctcpname) || irc::equals(ctcpname, "ACTION"))
-				return MOD_RES_PASSTHRU;
+		if (!IS_LOCAL(user))
+			return MOD_RES_PASSTHRU;
 
+		std::string ctcpname;
+		if (!details.IsCTCP(ctcpname) || irc::equals(ctcpname, "ACTION"))
+			return MOD_RES_PASSTHRU;
+
+		if (target.type == MessageTarget::TYPE_CHANNEL)
+		{
 			Channel* c = target.Get<Channel>();
 			ModResult res = CheckExemption::Call(exemptionprov, user, c, "noctcp");
 			if (res == MOD_RES_ALLOW)
@@ -58,6 +74,15 @@ class ModuleNoCTCP : public Module
 				return MOD_RES_DENY;
 			}
 		}
+		else if (target.type == MessageTarget::TYPE_USER)
+		{
+			User* u = target.Get<User>();
+			if (u->IsModeSet(ncu))
+			{
+				user->WriteNumeric(ERR_CANTSENDTOUSER, u->nick, "Can't send CTCP to user (+T set)");
+				return MOD_RES_PASSTHRU;
+			}
+		}
 		return MOD_RES_PASSTHRU;
 	}
 
-- 
2.39.2