From 320a00e7c65c43c2aa64d1da6e855428101c4aa6 Mon Sep 17 00:00:00 2001
From: PilzAdam <pilzadam@minetest.net>
Date: Fri, 12 Jul 2013 00:53:30 +0200
Subject: [PATCH] Disallow the name 'singleplayer' in a multiplayer server

---
 src/server.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/server.cpp b/src/server.cpp
index 1618a0915..60bf422f7 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -1922,6 +1922,15 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 			return;
 		}
 
+		if(!isSingleplayer() && strcasecmp(playername, "singleplayer") == 0)
+		{
+			actionstream<<"Server: Player with an invalid name "
+					<<"tried to connect from "<<addr_s<<std::endl;
+			SendAccessDenied(m_con, peer_id,
+					L"Name is not allowed");
+			return;
+		}
+
 		infostream<<"Server: New connection: \""<<playername<<"\" from "
 				<<m_con.GetPeerAddress(peer_id).serializeString()<<std::endl;