239 lines
9 KiB
Python
239 lines
9 KiB
Python
# This file is part of Gajim.
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#
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# Gajim is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published
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# by the Free Software Foundation; version 3 only.
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#
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# Gajim 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 General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
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"""
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Handles the jingle signalling protocol
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"""
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#TODO:
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# * things in XEP 0176, including:
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# - http://xmpp.org/extensions/xep-0176.html#protocol-restarts
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# - http://xmpp.org/extensions/xep-0176.html#fallback
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# * XEP 0177 (raw udp)
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# * UI:
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# - make state and codec informations available to the user
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# - video integration
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# * config:
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# - codecs
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import logging
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import nbxmpp
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from gajim.common import helpers
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from gajim.common import app
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from gajim.common.jingle_session import JingleSession, JingleStates
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from gajim.common.jingle_ft import JingleFileTransfer
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from gajim.common.jingle_transport import JingleTransportSocks5, JingleTransportIBB
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if app.is_installed('FARSTREAM'):
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from gajim.common.jingle_rtp import JingleAudio, JingleVideo
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logger = logging.getLogger('gajim.c.jingle')
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class ConnectionJingle(object):
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"""
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This object depends on that it is a part of Connection class.
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"""
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def __init__(self):
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# dictionary: sessionid => JingleSession object
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self._sessions = {}
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# dictionary: (jid, iq stanza id) => JingleSession object,
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# one time callbacks
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self.__iq_responses = {}
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self.files = []
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def delete_jingle_session(self, sid):
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"""
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Remove a jingle session from a jingle stanza dispatcher
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"""
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if sid in self._sessions:
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#FIXME: Move this elsewhere?
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for content in list(self._sessions[sid].contents.values()):
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content.destroy()
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self._sessions[sid].callbacks = []
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del self._sessions[sid]
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def _JingleCB(self, con, stanza):
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"""
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The jingle stanza dispatcher
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Route jingle stanza to proper JingleSession object, or create one if it
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is a new session.
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TODO: Also check if the stanza isn't an error stanza, if so route it
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adequately.
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"""
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# get data
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try:
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jid = helpers.get_full_jid_from_iq(stanza)
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except helpers.InvalidFormat:
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logger.warning('Invalid JID: %s, ignoring it', stanza.getFrom())
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return
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id_ = stanza.getID()
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if (jid, id_) in self.__iq_responses.keys():
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self.__iq_responses[(jid, id_)].on_stanza(stanza)
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del self.__iq_responses[(jid, id_)]
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raise nbxmpp.NodeProcessed
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jingle = stanza.getTag('jingle')
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# a jingle element is not necessary in iq-result stanza
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# don't check for that
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if jingle:
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sid = jingle.getAttr('sid')
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else:
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sid = None
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for sesn in self._sessions.values():
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if id_ in sesn.iq_ids:
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sesn.on_stanza(stanza)
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return
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# do we need to create a new jingle object
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if sid not in self._sessions:
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#TODO: tie-breaking and other things...
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newjingle = JingleSession(con=self, weinitiate=False, jid=jid,
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iq_id=id_, sid=sid)
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self._sessions[sid] = newjingle
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# we already have such session in dispatcher...
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self._sessions[sid].collect_iq_id(id_)
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self._sessions[sid].on_stanza(stanza)
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# Delete invalid/unneeded sessions
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if sid in self._sessions and \
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self._sessions[sid].state == JingleStates.ENDED:
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self.delete_jingle_session(sid)
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raise nbxmpp.NodeProcessed
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def start_audio(self, jid):
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if self.get_jingle_session(jid, media='audio'):
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return self.get_jingle_session(jid, media='audio').sid
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jingle = self.get_jingle_session(jid, media='video')
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if jingle:
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jingle.add_content('voice', JingleAudio(jingle))
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else:
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jingle = JingleSession(self, weinitiate=True, jid=jid)
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self._sessions[jingle.sid] = jingle
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jingle.add_content('voice', JingleAudio(jingle))
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jingle.start_session()
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return jingle.sid
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def start_video(self, jid, in_xid, out_xid):
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if self.get_jingle_session(jid, media='video'):
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return self.get_jingle_session(jid, media='video').sid
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jingle = self.get_jingle_session(jid, media='audio')
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if jingle:
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jingle.add_content('video', JingleVideo(jingle, in_xid=in_xid,
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out_xid=out_xid))
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else:
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jingle = JingleSession(self, weinitiate=True, jid=jid)
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self._sessions[jingle.sid] = jingle
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jingle.add_content('video', JingleVideo(jingle, in_xid=in_xid,
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out_xid=out_xid))
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jingle.start_session()
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return jingle.sid
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def start_file_transfer(self, jid, file_props, request=False):
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logger.info("start file transfer with file: %s", file_props)
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contact = app.contacts.get_contact_with_highest_priority(self.name,
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app.get_jid_without_resource(jid))
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if app.contacts.is_gc_contact(self.name, jid):
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gcc = jid.split('/')
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if len(gcc) == 2:
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contact = app.contacts.get_gc_contact(self.name, gcc[0], gcc[1])
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if contact is None:
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return
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use_security = contact.supports(nbxmpp.NS_JINGLE_XTLS)
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jingle = JingleSession(self, weinitiate=True, jid=jid, werequest=request)
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# this is a file transfer
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jingle.session_type_ft = True
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self._sessions[jingle.sid] = jingle
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file_props.sid = jingle.sid
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if contact.supports(nbxmpp.NS_JINGLE_BYTESTREAM):
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transport = JingleTransportSocks5()
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elif contact.supports(nbxmpp.NS_JINGLE_IBB):
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transport = JingleTransportIBB()
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senders = 'initiator'
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if request:
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senders = 'responder'
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c = JingleFileTransfer(jingle, transport=transport,
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file_props=file_props,
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use_security=use_security,
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senders=senders)
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file_props.transport_sid = transport.sid
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file_props.algo = self.__hash_support(contact)
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jingle.add_content('file' + helpers.get_random_string_16(), c)
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jingle.start_session()
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return c.transport.sid
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def __hash_support(self, contact):
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if contact.supports(nbxmpp.NS_HASHES_2):
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if contact.supports(nbxmpp.NS_HASHES_BLAKE2B_512):
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return 'blake2b-512'
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elif contact.supports(nbxmpp.NS_HASHES_BLAKE2B_256):
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return 'blake2b-256'
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elif contact.supports(nbxmpp.NS_HASHES_SHA3_512):
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return 'sha3-512'
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elif contact.supports(nbxmpp.NS_HASHES_SHA3_256):
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return 'sha3-256'
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elif contact.supports(nbxmpp.NS_HASHES_SHA512):
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return 'sha-512'
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elif contact.supports(nbxmpp.NS_HASHES_SHA256):
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return 'sha-256'
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return None
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def iter_jingle_sessions(self, jid, sid=None, media=None):
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if sid:
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return (session for session in self._sessions.values() if \
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session.sid == sid)
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sessions = (session for session in self._sessions.values() if \
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session.peerjid == jid)
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if media:
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if media not in ('audio', 'video', 'file'):
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return tuple()
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else:
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return (session for session in sessions if \
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session.get_content(media))
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else:
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return sessions
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def set_file_info(self, file_):
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# Saves information about the files we have transferred in case they need
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# to be requested again.
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self.files.append(file_)
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def get_file_info(self, peerjid, hash_=None, name=None, account=None):
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if hash_:
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for f in self.files: # DEBUG
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#if f['hash'] == '1294809248109223':
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if f['hash'] == hash_ and f['peerjid'] == peerjid:
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return f
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elif name:
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for f in self.files:
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if f['name'] == name and f['peerjid'] == peerjid:
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return f
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def get_jingle_session(self, jid, sid=None, media=None):
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if sid:
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if sid in self._sessions:
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return self._sessions[sid]
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else:
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return None
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elif media:
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if media not in ('audio', 'video', 'file'):
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return None
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for session in self._sessions.values():
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if session.peerjid == jid and session.get_content(media):
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return session
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return None
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