113 lines
4.2 KiB
Python
113 lines
4.2 KiB
Python
#!/usr/bin/env python3
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# SAT plugin for Jingle (XEP-0261)
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# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from sat.core.i18n import _
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from sat.core.constants import Const as C
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from sat.core.log import getLogger
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log = getLogger(__name__)
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from wokkel import disco, iwokkel
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from zope.interface import implementer
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from twisted.words.xish import domish
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import uuid
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try:
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from twisted.words.protocols.xmlstream import XMPPHandler
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except ImportError:
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from wokkel.subprotocols import XMPPHandler
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NS_JINGLE_IBB = "urn:xmpp:jingle:transports:ibb:1"
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PLUGIN_INFO = {
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C.PI_NAME: "Jingle In-Band Bytestreams",
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C.PI_IMPORT_NAME: "XEP-0261",
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C.PI_TYPE: "XEP",
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C.PI_MODES: C.PLUG_MODE_BOTH,
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C.PI_PROTOCOLS: ["XEP-0261"],
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C.PI_DEPENDENCIES: ["XEP-0166", "XEP-0047"],
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C.PI_MAIN: "XEP_0261",
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C.PI_HANDLER: "yes",
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C.PI_DESCRIPTION: _("""Implementation of Jingle In-Band Bytestreams"""),
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}
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class XEP_0261(object):
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NAMESPACE = NS_JINGLE_IBB # used by XEP-0260 plugin for transport-replace
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def __init__(self, host):
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log.info(_("plugin Jingle In-Band Bytestreams"))
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self.host = host
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self._j = host.plugins["XEP-0166"] # shortcut to access jingle
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self._ibb = host.plugins["XEP-0047"] # and in-band bytestream
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self._j.registerTransport(
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NS_JINGLE_IBB, self._j.TRANSPORT_STREAMING, self, -10000
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) # must be the lowest priority
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def getHandler(self, client):
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return XEP_0261_handler()
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def jingleSessionInit(self, client, session, content_name):
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transport_elt = domish.Element((NS_JINGLE_IBB, "transport"))
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content_data = session["contents"][content_name]
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transport_data = content_data["transport_data"]
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transport_data["block_size"] = self._ibb.BLOCK_SIZE
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transport_elt["block-size"] = str(transport_data["block_size"])
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transport_elt["sid"] = transport_data["sid"] = str(uuid.uuid4())
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return transport_elt
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def jingleHandler(self, client, action, session, content_name, transport_elt):
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content_data = session["contents"][content_name]
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transport_data = content_data["transport_data"]
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if action in (
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self._j.A_SESSION_ACCEPT,
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self._j.A_ACCEPTED_ACK,
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self._j.A_TRANSPORT_ACCEPT,
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):
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pass
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elif action in (self._j.A_SESSION_INITIATE, self._j.A_TRANSPORT_REPLACE):
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transport_data["sid"] = transport_elt["sid"]
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elif action in (self._j.A_START, self._j.A_PREPARE_RESPONDER):
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local_jid = session["local_jid"]
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peer_jid = session["peer_jid"]
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sid = transport_data["sid"]
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stream_object = content_data["stream_object"]
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if action == self._j.A_START:
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block_size = transport_data["block_size"]
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d = self._ibb.startStream(
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client, stream_object, local_jid, peer_jid, sid, block_size
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)
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d.chainDeferred(content_data["finished_d"])
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else:
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d = self._ibb.createSession(
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client, stream_object, local_jid, peer_jid, sid)
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d.chainDeferred(content_data["finished_d"])
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else:
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log.warning("FIXME: unmanaged action {}".format(action))
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return transport_elt
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@implementer(iwokkel.IDisco)
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class XEP_0261_handler(XMPPHandler):
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def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
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return [disco.DiscoFeature(NS_JINGLE_IBB)]
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def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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return []
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