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Limit sign length to 512 (~6 lines of 80 char or so).

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Players can enter unlimited text into the field, causing lag and
potentially locking up clients. I have not found any negative effects
server side, other than the large storage needed to store the long
text.
This commit is contained in:
Auke Kok 2019-02-04 21:28:00 -08:00 committed by sofar
parent 14cc07bfd3
commit 6b2887e3bf
1 changed files with 12 additions and 5 deletions
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17
mods/default/nodes.lua
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@ -2575,12 +2575,19 @@ local function register_sign(material, desc, def)
minetest.record_protection_violation(pos, player_name) minetest.record_protection_violation(pos, player_name)
return return
end end
local meta = minetest.get_meta(pos) local text = fields.text
if not fields.text then return end if not text then
return
end
if string.len(text) > 512 then
minetest.chat_send_player(player_name, "Text too long")
return
end
minetest.log("action", (player_name or "") .. " wrote \"" .. minetest.log("action", (player_name or "") .. " wrote \"" ..
fields.text .. "\" to sign at " .. minetest.pos_to_string(pos)) text .. "\" to sign at " .. minetest.pos_to_string(pos))
meta:set_string("text", fields.text) local meta = minetest.get_meta(pos)
meta:set_string("infotext", '"' .. fields.text .. '"') meta:set_string("text", text)
meta:set_string("infotext", '"' .. text .. '"')
end, end,
}) })
end end