MineClone5/mods/PLAYER/mcl_anticheat/init.lua

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2021-12-17 00:19:24 +01:00
local flights_kick_threshold = 10
local suffocations_kick_threshold = 1
local after = minetest.after
local get_connected_players = minetest.get_connected_players
local get_node = minetest.get_node
local get_objects_inside_radius = minetest.get_objects_inside_radius
local get_player_by_name = minetest.get_player_by_name
local is_creative_enabled = minetest.is_creative_enabled
local kick_player = minetest.kick_player
local set_node = minetest.set_node
local ceil = math.ceil
local floor = math.floor
local distance = vector.distance
local window_size = 10
local detection_interval = 1.7
local step_seconds = detection_interval / window_size
local joined_players = {}
local function update_player(player_object)
if not player_object then return end
local name = player_object:get_player_name()
if not name then return end
local pos = player_object:get_pos()
local x, y, z = floor(pos.x), floor(pos.y-0.1), floor(pos.z)
if mcl_playerplus.elytra then
local elytra = mcl_playerplus.elytra[player_object]
if elytra and elytra.active then
return
end
end
local air = get_node({x = x , y = y , z = z }).name == "air"
and get_node({x = x , y = y , z = z + 1}).name == "air"
and get_node({x = x , y = y + 1, z = z }).name == "air"
and get_node({x = x , y = y + 1, z = z + 1}).name == "air"
and get_node({x = x + 1, y = y , z = z }).name == "air"
and get_node({x = x + 1, y = y , z = z + 1}).name == "air"
and get_node({x = x + 1, y = y + 1, z = z }).name == "air"
and get_node({x = x + 1, y = y + 1, z = z + 1}).name == "air"
local player_data = {
pos = pos,
velocity = player_object:get_velocity(),
air = air
}
if joined_players[name] then
local window_offset = (joined_players[name].window_offset + 1) % window_size
joined_players[name].window_offset = window_offset
joined_players[name][window_offset] = player_data
else
joined_players[name] = {
window_offset = 0,
[0] = player_data,
}
end
end
local function check_player(name)
if is_creative_enabled(name) then return end
local data = joined_players[name]
if not data then return end
if not data[0] then return end
local always_air = true
local falling = data[0].velocity.y < 0
for i = 0, window_size - 1 do
local derivative = data[i]
local not_enough_data = not derivative
if not_enough_data then
return
end
always_air = always_air and derivative.air
falling = falling or derivative.velocity.y < 0
end
if always_air and not falling then
-- fly detected
if not data.flights then
data.flights = 1
else
data.flights = data.flights + 1
if data.flights >= flights_kick_threshold then
kick_player(name, "flights")
end
end
local obj_player = minetest.get_player_by_name(name)
if not obj_player then
kick_player(name, "flights")
end
local velocity = obj_player:get_velocity()
local pos = obj_player:get_pos()
local x, y, z = floor(pos.x), floor(pos.y), floor(pos.z)
while ( get_node({x = x , y = y, z = z }).name == "air"
and get_node({x = x , y = y, z = z + 1}).name == "air"
and get_node({x = x + 1, y = y, z = z }).name == "air"
and get_node({x = x + 1, y = y, z = z + 1}).name == "air"
) do
y = y - 1
end
obj_player:set_velocity({x = velocity.x, y = -10, z = velocity.z})
obj_player:set_pos({x = x, y = y + 0.5, z = z})
end
end
local function remove_player(player_object)
if not player_object then return end
local name = player_object:get_player_name()
if not name then return end
minetest.after(step_seconds, function()
joined_players[name] = nil
end)
end
local function step()
for _, player in pairs(get_connected_players()) do
update_player(player)
check_player(player:get_player_name())
end
after(step_seconds, step)
end
minetest.register_on_placenode(function(pos, newnode, placer, oldnode, itemstack, pointed_thing)
if not oldnode then return end
if not placer then return end
if oldnode.name ~= "air" then return end
if not placer:is_player() then return end
local placer_pos = placer:get_pos()
local placer_distance = distance(pos, placer_pos)
if placer_distance < 13 then return end
local is_choker = false
for _, object in pairs(get_objects_inside_radius(pos, 2)) do
if object and object:is_player() then
local player_head_pos = object:get_pos()
player_head_pos.y = player_head_pos.y + 1.5
local player_head_distance = distance(pos, player_head_pos)
if player_head_distance < 0.7 then
after(0.05, function(node)
set_node(pos, node)
end, oldnode)
is_choker = true
break
end
end
end
if not is_choker then return end
-- cheater choked the player from distance greater than 12:
local name = placer:get_player_name()
local data = joined_players[name]
if not data then
joined_players[name].suffocations = 1
data = joined_players[name]
else
if not data.suffocations then
data.suffocations = 1
else
data.suffocations = data.suffocations + 1
end
end
if data.suffocations >= suffocations_kick_threshold then
kick_player(name, "choker")
end
end)
minetest.register_on_joinplayer(update_player)
minetest.register_on_leaveplayer(remove_player)
after(step_seconds, step)