From c15f5f69dc41057195299db48e7b90753aeca58a Mon Sep 17 00:00:00 2001
From: sys4-fr <sys4@free.fr>
Date: Sat, 8 Sep 2018 14:00:37 +0200
Subject: [PATCH] =?UTF-8?q?Remplissage=20du=20d=C3=A9p=C3=B4t.?=
MIME-Version: 1.0
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---
 depends.txt |   0
 init.lua    | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 110 insertions(+)
 create mode 100755 depends.txt
 create mode 100755 init.lua

diff --git a/depends.txt b/depends.txt
new file mode 100755
index 0000000..e69de29
diff --git a/init.lua b/init.lua
new file mode 100755
index 0000000..8f80be2
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,110 @@
+minetest.register_privilege("whois", {
+    description = "Allows player to see other player IPs"})
+
+-- Created by Krock to stop mass-account-creators
+-- License: WTFPL
+
+ipnames = {}
+ipnames.data = {}
+ipnames.tmp_data = {}
+ipnames.changes = false
+ipnames.file = minetest.get_worldpath().."/ipnames.txt"
+
+ipnames.name_per_ip_limit = tonumber(minetest.setting_get("max_names_per_ip")) or 5
+
+-- Get accounts self:
+minetest.register_chatcommand("whois", {
+	description = "Gets all players who have the same IP as the specified player",
+	privs = {whois = true},
+	func = function(name, param)
+		if not ipnames.data[param] then
+			minetest.chat_send_player(name, "The player \"" .. param .. "\" did not join yet.")
+			return
+		end
+
+		local ip = ipnames.data[param]
+		local names = "";
+		for k, v in pairs(ipnames.data) do
+			if v == ip then
+				if names ~= "" then
+					names = names .. ", " .. k
+				else
+					names = names .. " " .. k
+				end
+			end
+		end
+		minetest.chat_send_player(name, "Players for IP address " .. ip .. ": " .. names)
+	end,
+})
+
+-- Get IP if player tries to join, ban if there are too much names per IP:
+minetest.register_on_prejoinplayer(function(name, ip)
+	-- Only stop new accounts:
+	ipnames.tmp_data[name] = ip
+	if not ipnames.data[name] then
+		local count = 1
+		local names = ""
+		for k, v in pairs(ipnames.data) do
+			if v == ip then
+				count = count + 1
+				names = names .. k .. ", "
+			end
+		end
+
+		if count <= ipnames.name_per_ip_limit and count > 1 then
+			minetest.log("action", name .. " now has " .. count .. " accounts. Other accounts: " .. names)
+		end
+
+		if count > ipnames.name_per_ip_limit then
+			ipnames.tmp_data[name] = nil
+			if tostring(ip) ~= "127.0.0.1" then
+				return ("\nYou exceeded the limit of accounts (" .. ipnames.name_per_ip_limit ..
+				").\nYou already have the following accounts:\n" .. names)
+			end
+		end
+	end
+end)
+
+-- Save IP if player joined:
+minetest.register_on_joinplayer(function(player)
+	local name = player:get_player_name()
+	ipnames.data[name] = ipnames.tmp_data[name]
+	ipnames.tmp_data[name] = nil
+	ipnames.changes = true
+	ipnames.save_data()
+end)
+
+function ipnames.load_data()
+	local file = io.open(ipnames.file, "r")
+	if not file then
+		return
+	end
+	for line in file:lines() do
+		if line ~= "" then
+			local data = line:split("|")
+			if #data >= 2 then
+				ipnames.data[data[1]] = data[2]
+			end
+		end
+	end
+	io.close(file)
+end
+
+function ipnames.save_data()
+	if not ipnames.changes then
+		return
+	end
+	ipnames.changes = false
+	local file = io.open(ipnames.file, "w")
+	for i, v in pairs(ipnames.data) do
+		if v ~= nil then
+			file:write(i .. "|" .. v .. "\n")
+		end
+	end
+	io.close(file)
+end
+
+
+minetest.register_on_shutdown(function() ipnames.save_data() end)
+
+minetest.after(3, function() ipnames.load_data() end)