view mod_adhoc_blacklist/mod_adhoc_blacklist.lua @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents efbb73851af9
children
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-- mod_adhoc_blacklist
--
-- http://xmpp.org/extensions/xep-0133.html#edit-blacklist
--
-- Copyright (C) 2015 Kim Alvefur
--
-- This file is MIT/X11 licensed.
--

module:depends("adhoc");
local adhoc = module:require "adhoc";
local st = require"util.stanza";
local set = require"util.set";
local dataform = require"util.dataforms";
local adhoc_inital_data = require "util.adhoc".new_initial_data_form;

local blocklist_form = dataform.new {
	title = "Editing the Blacklist";
	instructions = "Fill out this form to edit the list of entities with whom communications are disallowed.";
	{
		type = "hidden";
		name = "FORM_TYPE";
		value = "http://jabber.org/protocol/admin";
	};
	{
		type = "jid-multi";
		name = "blacklistjids";
		label = "The blacklist";
	};
}

local blocklists = module:open_store("blocklist");

local blocklist_handler = adhoc_inital_data(blocklist_form, function ()
	local blacklistjids = {};
	local blacklist = blocklists:get();
	if blacklist then
		for jid in pairs(blacklist) do
			table.insert(blacklistjids, jid);
		end
	end
	return { blacklistjids = blacklistjids };
end, function(fields, form_err)
	if form_err then
		return { status = "completed", error = { message = "Problem in submitted form" } };
	end
	local blacklistjids = set.new(fields.blacklistjids);
	local ok, err = blocklists:set(nil, blacklistjids._items);
	if ok then
		return { status = "completed", info = "Blacklist updated" };
	else
		return { status = "completed", error = { message = "Error saving blacklist: "..err } };
	end
end);

module:add_item("adhoc", adhoc.new("Edit Blacklist", "http://jabber.org/protocol/admin#edit-blacklist", blocklist_handler, "admin"));

local function is_blocked(host)
	local blacklistjids = blocklists:get();
	return blacklistjids and blacklistjids[host];
end

module:hook("route/remote", function (event)
	local origin, stanza = event.origin, event.stanza;
	if is_blocked(event.to_host) then
		if origin and stanza then
			origin.send(st.error_reply(stanza, "cancel", "not-allowed", "Communication with this domain is not allowed"));
			return true;
		end
		return false;
	end
end, 1000);


module:hook("s2s-stream-features", function (event)
	local session = event.origin;
	if is_blocked(session.from_host) then
		session:close("policy-violation");
		return false;
	end
end, 1000);

module:hook("stanza/http://etherx.jabber.org/streams:features", function (event)
	local session = event.origin;
	if is_blocked(session.to_host) then
		session:close("policy-violation");
		return true;
	end
end, 1000);