view mod_muc_access_control/mod_muc_access_control.lua @ 5518:d87d0e4a8516

mod_http_oauth2: Validate the OpenID 'prompt' parameter Without support for affecting the login and consent procedure, it seems sensible to inform the client that they can't change anything with this parameter.
author Kim Alvefur <zash@zash.se>
date Mon, 05 Jun 2023 22:19:17 +0200
parents f54c80404ad3
children
line wrap: on
line source

local st = require "util.stanza";
local jid = require "util.jid";
local nodeprep = require "util.encodings".stringprep.nodeprep;

local unprepped_access_lists = module:get_option("muc_access_lists", {});
local access_lists = {};

-- Make sure all input is prepped
for unprepped_room_name, unprepped_list in pairs(unprepped_access_lists) do
	local prepped_room_name = nodeprep(unprepped_room_name);
	if not prepped_room_name then
		module:log("error", "Invalid room name: %s", unprepped_room_name);
	else
		local prepped_list = {};
		for _, unprepped_jid in ipairs(unprepped_list) do
			local prepped_jid = jid.prep(unprepped_jid);
			if not prepped_jid then
				module:log("error", "Invalid JID: %s", unprepped_jid);
			else
				prepped_list[prepped_jid] = true;
			end
		end
		access_lists[prepped_room_name] = prepped_list;
	end
end

local function is_restricted(room, who)
	local allowed = access_lists[room];

	if allowed == nil or allowed[who] or allowed[select(2, jid.split(who))] then
		return nil;
	end

	return "forbidden";
end

module:hook("presence/full", function(event)
	local stanza = event.stanza;

	if stanza.name == "presence" and stanza.attr.type == "unavailable" then   -- Leaving events get discarded
		return;
	end

	-- Get the room
	local room = jid.split(stanza.attr.to);
        if not room then return; end

	-- Get who has tried to join it
	local who = jid.bare(stanza.attr.from)

	-- Checking whether room is restricted
	local check_restricted = is_restricted(room, who)
	if check_restricted ~= nil then
		event.allowed = false;
		event.stanza.attr.type = 'error';
		return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
	end
end, 10);