--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat/plugins/plugin_xep_0261.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,104 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# SAT plugin for Jingle (XEP-0261)
+# Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sat.core.i18n import _
+from sat.core.constants import Const as C
+from sat.core.log import getLogger
+log = getLogger(__name__)
+from wokkel import disco, iwokkel
+from zope.interface import implements
+from twisted.words.xish import domish
+import uuid
+
+try:
+    from twisted.words.protocols.xmlstream import XMPPHandler
+except ImportError:
+    from wokkel.subprotocols import XMPPHandler
+
+
+NS_JINGLE_IBB = 'urn:xmpp:jingle:transports:ibb:1'
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Jingle In-Band Bytestreams",
+    C.PI_IMPORT_NAME: "XEP-0261",
+    C.PI_TYPE: "XEP",
+    C.PI_MODES: C.PLUG_MODE_BOTH,
+    C.PI_PROTOCOLS: ["XEP-0261"],
+    C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0047"],
+    C.PI_MAIN: "XEP_0261",
+    C.PI_HANDLER: "yes",
+    C.PI_DESCRIPTION: _("""Implementation of Jingle In-Band Bytestreams""")
+}
+
+
+class XEP_0261(object):
+    NAMESPACE = NS_JINGLE_IBB # used by XEP-0260 plugin for transport-replace
+
+    def __init__(self, host):
+        log.info(_("plugin Jingle In-Band Bytestreams"))
+        self.host = host
+        self._j = host.plugins["XEP-0166"] # shortcut to access jingle
+        self._ibb = host.plugins["XEP-0047"] # and in-band bytestream
+        self._j.registerTransport(NS_JINGLE_IBB, self._j.TRANSPORT_STREAMING, self, -10000) # must be the lowest priority
+
+    def getHandler(self, client):
+        return XEP_0261_handler()
+
+    def jingleSessionInit(self, client, session, content_name):
+        transport_elt = domish.Element((NS_JINGLE_IBB, "transport"))
+        content_data = session['contents'][content_name]
+        transport_data = content_data['transport_data']
+        transport_data['block_size'] = self._ibb.BLOCK_SIZE
+        transport_elt['block-size'] = unicode(transport_data['block_size'])
+        transport_elt['sid'] = transport_data['sid'] = unicode(uuid.uuid4())
+        return transport_elt
+
+    def jingleHandler(self, client, action, session, content_name, transport_elt):
+        content_data = session['contents'][content_name]
+        transport_data = content_data['transport_data']
+        if action in (self._j.A_SESSION_ACCEPT,
+                      self._j.A_ACCEPTED_ACK,
+                      self._j.A_TRANSPORT_ACCEPT):
+            pass
+        elif action in (self._j.A_SESSION_INITIATE, self._j.A_TRANSPORT_REPLACE):
+            transport_data['sid'] = transport_elt['sid']
+        elif action in (self._j.A_START, self._j.A_PREPARE_RESPONDER):
+            peer_jid = session['peer_jid']
+            sid = transport_data['sid']
+            stream_object = content_data['stream_object']
+            if action == self._j.A_START:
+                block_size = transport_data['block_size']
+                d = self._ibb.startStream(client, stream_object, peer_jid, sid, block_size)
+                d.chainDeferred(content_data['finished_d'])
+            else:
+                d = self._ibb.createSession(client, stream_object, peer_jid, sid)
+                d.chainDeferred(content_data['finished_d'])
+        else:
+            log.warning(u"FIXME: unmanaged action {}".format(action))
+        return transport_elt
+
+
+class XEP_0261_handler(XMPPHandler):
+    implements(iwokkel.IDisco)
+
+    def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
+        return [disco.DiscoFeature(NS_JINGLE_IBB)]
+
+    def getDiscoItems(self, requestor, target, nodeIdentifier=''):
+        return []