view mod_block_s2s_subscriptions/mod_block_s2s_subscriptions.lua @ 4028:a0db4a0e66f1

mod_measure_message_e2ee: Add a warning for small servers leaking user behaviour.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 20 May 2020 16:42:32 +0200
parents 70ff25db37fa
children
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local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local load_roster = require "core.rostermanager".load_roster;

local blocked_servers = module:get_option_set("block_s2s_subscriptions")._items;

function filter_presence(event)
	if blocked_servers[event.origin.from_host] and event.stanza.attr.type == "subscribe" then
		local stanza = event.stanza;
		local to_user, to_host = jid_split(stanza.attr.to);
		local roster = load_roster(to_user, to_host);
		if roster and roster[jid_bare(stanza.attr.from)] then
			return; -- In roster, pass through
		end
		return true; -- Drop
	end
end

module:hook("presence/bare", filter_presence, 200); -- Client receiving