view mod_bind2/mod_bind2.lua @ 5296:0f5657db1cfc

mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parents 1539ae696613
children
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local mm = require "core.modulemanager";
local sm = require "core.sessionmanager";

local xmlns_sasl2 --[[<const>]] = "urn:xmpp:sasl:1";
local xmlns_bind2 --[[<const>]] = "urn:xmpp:bind2:0";
local xmlns_carbons --[[<const>]] = "urn:xmpp:carbons:2";

module:depends("sasl2");
module:depends("carbons");

module:hook("stream-features", function(event)
	local origin, features = event.origin, event.features;
	if origin.type ~= "c2s_unauthed" then return end
	features:tag("bind", xmlns_bind2):up();
end);

module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
	session.bind2 = auth:get_child("bind", xmlns_bind2);
end, 1);

module:hook("sasl2/c2s/success", function (event)
	local session = event.session;
	if not session.bind2 then return end

	-- When it receives a bind 2.0 on an authenticated not-yet-bound session, the
	-- server MUST:

	-- Clear the offline messages for this user, if any, without sending them (as
	-- they will be provided by MAM).
	if mm.is_loaded(module.host, "offline") then -- luacheck: ignore 542
		-- TODO
	end

	-- Perform resource binding to a random resource (see 6120)
	if not sm.bind_resource(session, nil) then
		-- FIXME How should this be handled even?
		session:close("reset");
		return true;
	end

	-- Work out which contacts have unread messages in the user's MAM archive,
	-- how many, and what the id of the last read message is
	-- XXX How do we know what the last read message was?
	-- TODO archive:summary(session.username, { after = ??? });

	-- Get the id of the newest stanza in the user's MAM archive
	-- TODO archive:find(session.username, { reverse = true, limit = 1 });

	-- Silently enable carbons for this session
	session.carbons = xmlns_carbons;

	-- After processing the bind stanza, as above, the server MUST respond with
	-- an element of type 'bound' in the namespace 'urn:xmpp:bind2:0', as in the
	-- below example
	event.success:tag("bound", xmlns_bind2):text_tag("jid", session.full_jid):up();

	session.bind2 = nil;
end);