local st = require "util.stanza";
local mod_smacks = module:depends("smacks");
local xmlns_sasl2 = "urn:xmpp:sasl:2";
local xmlns_sm = "urn:xmpp:sm:3";
module:depends("sasl2");
-- Advertise what we can do
module:hook("advertise-sasl-features", function (event)
local features = event.features;
features:tag("sm", { xmlns = xmlns_sm }):up();
end);
module:hook("advertise-bind-features", function (event)
local features = event.features;
features:tag("feature", { var = xmlns_sm }):up();
end);
module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
-- Cache action for future processing (after auth success)
session.sasl2_sm_request = auth:child_with_ns(xmlns_sm);
end, 100);
-- SASL 2 integration (for resume)
module:hook("sasl2/c2s/success", function (event)
local session = event.session;
local sm_request = session.sasl2_sm_request;
if not sm_request then return; end
session.sasl2_sm_request = nil;
local sm_result;
if sm_request.name ~= "resume" then return; end
local resumed, err = mod_smacks.do_resume(session, sm_request);
if not resumed then
local h = err.context and err.context.h;
sm_result = st.stanza("failed", { xmlns = xmlns_sm, h = h and ("%d"):format(h) or nil })
:add_error(err);
else
event.session = resumed.session; -- Update to resumed session
event.session.sasl2_sm_success = resumed; -- To be called after sending final SASL response
sm_result = st.stanza("resumed", { xmlns = xmlns_sm,
h = ("%d"):format(event.session.handled_stanza_count);
previd = resumed.id; });
end
if sm_result then
event.success:add_child(sm_result);
end
end, 110);
-- Bind 2 integration (for enable)
module:hook("enable-bind-features", function (event)
local sm_enable = event.request:get_child("enable", xmlns_sm);
if not sm_enable then return; end
local sm_result;
local enabled, err = mod_smacks.do_enable(event.session, sm_enable);
if not enabled then
sm_result = st.stanza("failed", { xmlns = xmlns_sm })
:add_error(err);
else
event.session.sasl2_sm_success = enabled; -- To be called after sending final SASL response
sm_result = st.stanza("enabled", {
xmlns = xmlns_sm;
id = enabled.id;
resume = enabled.id and "1" or nil;
max = enabled.resume_max;
});
end
event.result:add_child(sm_result);
end, 100);
-- Finish and/or clean up after SASL 2 completed
module:hook("sasl2/c2s/success", function (event)
-- The authenticate response has already been sent at this point
local success = event.session.sasl2_sm_success;
if success then
success.finish(); -- Finish enable/resume and sync stanzas
end
end, -1100);
module:hook("sasl2/c2s/failure", function (event)
event.session.sasl2_sm_request = nil;
end);