author | Kim Alvefur <zash@zash.se> |
Sat, 12 Jan 2013 02:36:30 +0100 | |
changeset 893 | 602e4c509095 |
parent 892 | 148865199003 |
child 894 | d066987e00b7 |
permissions | -rw-r--r-- |
892
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-- Bidirectional Server-to-Server Connections |
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-- http://xmpp.org/extensions/xep-0288.html |
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-- Copyright (C) 2013 Kim Alvefur |
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-- |
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-- This file is MIT/X11 licensed. |
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-- |
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local s2smanager = require"core.s2smanager"; |
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local add_filter = require "util.filters".add_filter; |
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local st = require "util.stanza"; |
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local jid_split = require"util.jid".prepped_split; |
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|
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local xmlns_bidi_feature = "urn:xmpp:features:bidi" |
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local xmlns_bidi = "urn:xmpp:bidi"; |
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local noop = function () end |
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local core_process_stanza = prosody.core_process_stanza; |
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|
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local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end |
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local function handlestanza(session, stanza) |
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if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client |
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stanza.attr.xmlns = nil; |
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end |
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-- stanza = session.filter("stanzas/in", stanza); |
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if stanza then |
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return xpcall(function () return core_process_stanza(session, stanza) end, handleerr); |
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end |
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end |
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|
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local function new_bidi(origin) |
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local bidi_session, remote_host; |
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origin.log("debug", "Creating bidirectional session wrapper"); |
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if origin.direction == "incoming" then -- then we create an "outgoing" bidirectional session |
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local conflicting_session = hosts[origin.to_host].s2sout[origin.from_host] |
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if conflicting_session then |
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conflicting_session.log("warn", "We already have an outgoing connection to %s, closing it...", origin.from_host); |
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conflicting_session:close{ condition = "conflict", text = "Replaced by bidirectional stream" } |
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s2smanager.destroy_session(conflicting_session); |
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end |
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remote_host = origin.from_host; |
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bidi_session = s2smanager.new_outgoing(origin.to_host, origin.from_host) |
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else -- outgoing -- then we create an "incoming" bidirectional session |
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remote_host = origin.to_host; |
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bidi_session = s2smanager.new_incoming(origin.conn) |
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bidi_session.to_host = origin.from_host; |
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bidi_session.from_host = origin.to_host; |
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add_filter(origin, "stanzas/in", function(stanza) |
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if stanza.attr.xmlns ~= nil then return stanza end |
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local _, host = jid_split(stanza.attr.from); |
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if host ~= remote_host then return stanza end |
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handlestanza(bidi_session, stanza); |
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end, 1); |
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end |
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origin.bidi_session = bidi_session; |
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bidi_session.sends2s = origin.sends2s; |
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bidi_session.bounce_sendq = noop; |
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bidi_session.notopen = nil; |
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bidi_session.is_bidi = true; |
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bidi_session.bidi_session = false; |
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bidi_session.orig_session = origin; |
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bidi_session.secure = origin.secure; |
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bidi_session.cert_identity_status = origin.cert_identity_status; |
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bidi_session.cert_chain_status = origin.cert_chain_status; |
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bidi_session.close = function(...) |
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return origin.close(...); |
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end |
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|
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bidi_session.log("info", "Bidirectional session established"); |
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s2smanager.make_authenticated(bidi_session, remote_host); |
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return bidi_session; |
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end |
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|
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-- Incoming s2s |
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module:hook("s2s-stream-features", function(event) |
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local origin, features = event.origin, event.features; |
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if not origin.is_bidi and not hosts[module.host].s2sout[origin.from_host] then |
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module:log("debug", "Announcing support for bidirectional streams"); |
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features:tag("bidi", { xmlns = xmlns_bidi_feature }):up(); |
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end |
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end); |
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|
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module:hook("stanza/urn:xmpp:bidi:bidi", function(event) |
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local origin = event.session or event.origin; |
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if not origin.is_bidi and not origin.bidi_session then |
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module:log("debug", "%s requested bidirectional stream", origin.from_host); |
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origin.do_bidi = true; |
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return true; |
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end |
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end); |
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|
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-- Outgoing s2s |
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module:hook("stanza/http://etherx.jabber.org/streams:features", function(event) |
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local origin = event.session or event.origin; |
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if not ( origin.bidi_session or origin.is_bidi or origin.do_bidi) |
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and event.stanza:get_child("bidi", xmlns_bidi_feature) then |
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module:log("debug", "%s supports bidirectional streams", origin.to_host); |
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origin.sends2s(st.stanza("bidi", { xmlns = xmlns_bidi })); |
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origin.do_bidi = true; |
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end |
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end, 160); |
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|
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function enable_bidi(event) |
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local session = event.session; |
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if session.do_bidi and not ( session.is_bidi or session.bidi_session ) then |
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session.do_bidi = nil; |
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new_bidi(session); |
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end |
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end |
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|
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module:hook("s2sin-established", enable_bidi); |
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module:hook("s2sout-established", enable_bidi); |
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|
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function disable_bidi(event) |
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local session = event.session; |
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if session.bidi_session then |
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local bidi_session = session.bidi_session; |
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session.bidi_session = nil; |
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session.log("debug", "Tearing down bidirectional stream"); |
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s2smanager.destroy_session(bidi_session, event.reason); |
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elseif session.orig_session then |
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local orig_session = session.orig_session; |
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session.orig_session = nil; |
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orig_session.log("debug", "Tearing down bidirectional stream"); |
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s2smanager.destroy_session(orig_session, event.reason); |
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123 |
end |
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end |
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|
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module:hook("s2sin-destroyed", disable_bidi); |
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module:hook("s2sout-destroyed", disable_bidi); |
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128 |