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prosody
File
plugins/muc/moderated.lib.lua @ 11665:148075532021
net.server_epoll: Prevent stack overflow of opportunistic writes
net.http.files serving a big enough file on a fast enough connection
with opportunistic_writes enabled could trigger a stack overflow through
repeatedly serving more data that immediately gets sent, draining the
buffer and triggering more data to be sent. This also blocked the server
on a single task until completion or an error.
This change prevents nested opportunistic writes, which should prevent
the stack overflow, at the cost of reduced download speed, but this is
unlikely to be noticeable outside of Gbit networks. Speed at the cost of
blocking other processing is not worth it, especially with the risk of
stack overflow.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Sun, 11 Jul 2021 09:39:21 +0200 |
parent | 9035:173c0e16e704 |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- Copyright (C) 2014 Daurnimator -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local function get_moderated(room) return room._data.moderated; end local function set_moderated(room, moderated) moderated = moderated and true or nil; if get_moderated(room) == moderated then return false; end room._data.moderated = moderated; return true; end module:hook("muc-disco#info", function(event) event.reply:tag("feature", {var = get_moderated(event.room) and "muc_moderated" or "muc_unmoderated"}):up(); end); module:hook("muc-config-form", function(event) table.insert(event.form, { name = "muc#roomconfig_moderatedroom"; type = "boolean"; label = "Moderated (require permission to speak)"; desc = "In moderated rooms occupants must be given permission to speak by a room moderator"; value = get_moderated(event.room); }); end, 80-3); module:hook("muc-config-submitted/muc#roomconfig_moderatedroom", function(event) if set_moderated(event.room, event.value) then event.status_codes["104"] = true; end end); module:hook("muc-get-default-role", function(event) if event.affiliation == nil then if get_moderated(event.room) then -- XEP-0045: -- An implementation MAY grant voice by default to visitors in unmoderated rooms. return "visitor" end end end, 1); return { get = get_moderated; set = set_moderated; };