-- mod_admin_blocklist

--

-- If a local admin has blocked a domain, don't allow s2s to that domain

--

-- Copyright (C) 2015-2021 Kim Alvefur

--

-- This file is MIT/X11 licensed.

--

module:depends("blocklist");

local st = require"util.stanza";

local jid_split = require"util.jid".split;

local usermanager = require "core.usermanager";

local admins;

if usermanager.get_jids_with_role then

	local set = require "util.set";

	admins = set.new(usermanager.get_jids_with_role("prosody:admin"), module.host);

else -- COMPAT w/pre-0.12

	admins = module:get_option_inherited_set("admins", {});

end

admins = admins /

	function (admin) -- Filter out non-local admins

		local user, host = jid_split(admin);

		if host == module.host then return user; end

	end

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

local function is_blocked(host)

	for admin in admins do

		local blocklist = blocklists:get(admin);

		if blocklist and blocklist[host] then

			return true;

		end

	end

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, -9);

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);