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# This file is part of Gajim.
#
# Gajim is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published
# by the Free Software Foundation; version 3 only.
#
# Gajim 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
# Handles Jingle File Transfer (XEP 0234)
from __future__ import annotations
from typing import Any
from typing import TYPE_CHECKING
import logging
import threading
import time
import uuid
from enum import IntEnum
from enum import unique
import nbxmpp
from nbxmpp import JID
from nbxmpp.namespaces import Namespace
from gajim.common import app
from gajim.common import helpers
from gajim.common.events import FileRequestReceivedEvent
from gajim.common.file_props import FileProp
from gajim.common.file_props import FilesProp
from gajim.common.jingle_content import contents
from gajim.common.jingle_content import JingleContent
from gajim.common.jingle_ftstates import StateCandReceived
from gajim.common.jingle_ftstates import StateCandSent
from gajim.common.jingle_ftstates import StateCandSentAndRecv
from gajim.common.jingle_ftstates import StateInitialized
from gajim.common.jingle_ftstates import StateTransfering
from gajim.common.jingle_ftstates import StateTransportReplace
from gajim.common.jingle_transport import JingleTransportSocks5
from gajim.common.jingle_transport import TransportType
from gajim.common.storage.archive.const import ChatDirection
from gajim.common.storage.archive.const import FiletransferSourceType
from gajim.common.storage.archive.const import MessageState
from gajim.common.storage.archive.const import MessageType
from gajim.common.storage.archive.structs import DbInsertFiletransferRowData
from gajim.common.storage.archive.structs import DbInsertMessageRowData
if TYPE_CHECKING:
from gajim.common.jingle_session import JingleSession
from gajim.common.jingle_transport import JingleTransport
log = logging.getLogger('gajim.c.jingle_ft')
@unique
class State(IntEnum):
NOT_STARTED = 0
INITIALIZED = 1
# We send the candidates and we are waiting for a reply
CAND_SENT = 2
# We received the candidates and we are waiting to reply
CAND_RECEIVED = 3
# We have sent and received the candidates
# This also includes any candidate-error received or sent
CAND_SENT_AND_RECEIVED = 4
TRANSPORT_REPLACE = 5
# We are transferring the file
TRANSFERRING = 6
class JingleFileTransfer(JingleContent):
def __init__(self,
session: JingleSession,
file_props: FileProp,
transport: JingleTransport | None = None,
senders: str | None = None
) -> None:
JingleContent.__init__(self, session, transport, senders)
log.info('transport value: %s', transport)
# events we might be interested in
self.callbacks['session-initiate'] += [self.__on_session_initiate]
self.callbacks['session-initiate-sent'] += [
self.__on_session_initiate_sent]
self.callbacks['content-add'] += [self.__on_session_initiate]
self.callbacks['session-accept'] += [self.__on_session_accept]
self.callbacks['session-terminate'] += [self.__on_session_terminate]
self.callbacks['session-info'] += [self.__on_session_info]
self.callbacks['transport-accept'] += [self.__on_transport_accept]
self.callbacks['transport-replace'] += [self.__on_transport_replace]
self.callbacks['session-accept-sent'] += [self.__transport_setup]
# fallback transport method
self.callbacks['transport-reject'] += [self.__on_transport_reject]
self.callbacks['transport-info'] += [self.__on_transport_info]
self.callbacks['iq-result'] += [self.__on_iq_result]
self.file_props = file_props
self.weinitiate = self.session.weinitiate
self.werequest = self.session.werequest
if transport is None:
self.transport = JingleTransportSocks5()
self.transport.set_connection(session.connection)
self.transport.set_file_props(self.file_props)
self.transport.set_our_jid(session.ourjid)
log.info('ourjid: %s', session.ourjid)
if self.session.werequest:
self.file_props.sender = self.session.peerjid
self.file_props.receiver = self.session.ourjid
else:
self.file_props.sender = self.session.ourjid
self.file_props.receiver = self.session.peerjid
self.file_props.session_type = 'jingle'
self.file_props.sid = session.sid
self.file_props.transferred_size = []
self.file_props.transport_sid = self.transport.sid
self.session = session
self.media = 'file'
self.nominated_cand = {}
self.state = State.NOT_STARTED
self.states = {
State.INITIALIZED: StateInitialized(self),
State.CAND_SENT: StateCandSent(self),
State.CAND_RECEIVED: StateCandReceived(self),
State.TRANSFERRING: StateTransfering(self),
State.TRANSPORT_REPLACE: StateTransportReplace(self),
State.CAND_SENT_AND_RECEIVED: StateCandSentAndRecv(self)
}
def __state_changed(self,
nextstate: State,
args: dict[str, Any] | None = None
) -> None:
# Executes the next state action and sets the next state
current_state = self.state
st = self.states[nextstate]
st.action(args)
# state can have been changed during the action. Don't go back.
if self.state == current_state:
self.state = nextstate
def __on_session_initiate(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.debug('Jingle FT request received')
self._raise_event(stanza, content)
account = self.session.connection.name
jid = self.session.connection.get_module('Bytestream')._ft_get_from(
stanza)
jid = JID.from_string(jid)
sid = stanza.getTag('jingle').getAttr('sid')
assert sid is not None
message_data = DbInsertMessageRowData(
account=account,
remote_jid=jid.new_as_bare(),
m_type=MessageType.CHAT,
direction=ChatDirection.INCOMING,
timestamp=time.time(),
state=MessageState.ACKNOWLEDGED,
message_id=str(uuid.uuid4()),
)
message_ek = app.storage.archive.insert_row(message_data)
filetransfer_data = DbInsertFiletransferRowData(
fk_message_ek=message_ek,
source_type=FiletransferSourceType.JINGLE,
source=sid,
state=1,
)
app.storage.archive.insert_row(filetransfer_data)
if self.session.request:
# accept the request
self.session.approve_content(self.media, self.name)
self.session.accept_session()
def _raise_event(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node
) -> None:
con = self.session.connection
id_ = stanza.getID()
fjid = con.get_module('Bytestream')._ft_get_from(stanza)
account = con.name
jid = app.get_jid_without_resource(fjid)
jid = JID.from_string(jid)
if not content:
return
if not self.transport:
self.transport = JingleTransportSocks5()
self.transport.set_our_jid(self.session.ourjid)
self.transport.set_connection(con)
sid = stanza.getTag('jingle').getAttr('sid')
file_props = FilesProp.getNewFileProp(account, sid)
file_props.transport_sid = self.transport.sid
self.transport.set_file_props(file_props)
file_props.streamhosts.extend(self.transport.remote_candidates)
for host in file_props.streamhosts:
host['initiator'] = self.session.initiator
host['target'] = self.session.responder
file_props.session_type = 'jingle'
desc = content.getTag('description')
if content.getAttr('creator') == 'initiator':
file_tag = desc.getTag('file')
file_props.sender = fjid
file_props.receiver = str(con.get_own_jid())
else:
file_tag = desc.getTag('file')
hash_ = file_tag.getTag('hash')
hash_ = hash_.getData() if hash_ else None
file_name = file_tag.getTag('name')
file_name = file_name.getData() if file_name else None
pjid = app.get_jid_without_resource(fjid)
file_info = con.get_module('Jingle').get_file_info(
pjid, hash_=hash_, name=file_name, account=account)
file_props.file_name = file_info['file-name']
file_props.sender = str(con.get_own_jid())
file_props.receiver = fjid
file_props.type_ = 's'
for child in file_tag.getChildren():
name = child.getName()
val = child.getData()
if val is None:
continue
if name == 'name':
file_props.name = val
if name == 'size':
file_props.size = int(val)
if name == 'hash':
file_props.algo = child.getAttr('algo')
file_props.hash_ = val
if name == 'date':
file_props.date = val
file_props.request_id = id_
file_desc_tag = file_tag.getTag('desc')
if file_desc_tag is not None:
file_props.desc = file_desc_tag.getData()
file_props.transferred_size = []
app.ged.raise_event(FileRequestReceivedEvent(
conn=con,
stanza=stanza,
id_=id_,
fjid=fjid,
account=account,
jid=jid,
file_props=file_props))
def __on_session_initiate_sent(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
pass
def __send_hash(self) -> None:
# Send hash in a session info
checksum = nbxmpp.Node(tag='checksum',
payload=[
nbxmpp.Node(tag='file',
payload=[self._compute_hash()])
])
checksum.setNamespace(Namespace.JINGLE_FILE_TRANSFER_5)
self.session.__session_info(checksum)
pjid = app.get_jid_without_resource(self.session.peerjid)
file_info = {
'name': self.file_props.name,
'file-name': self.file_props.file_name,
'hash': self.file_props.hash_,
'size': self.file_props.size,
'date': self.file_props.date,
'peerjid': pjid
}
self.session.connection.get_module('Jingle').set_file_info(file_info)
def _compute_hash(self) -> nbxmpp.Hashes2 | None:
# Calculates the hash and returns a xep-300 hash stanza
if self.file_props.algo is None:
return
try:
file_ = open(self.file_props.file_name, 'rb')
except OSError:
# can't open file
return
h = nbxmpp.Hashes2()
hash_ = h.calculateHash(self.file_props.algo, file_)
file_.close()
# DEBUG
# hash_ = '1294809248109223'
if not hash_:
# Hash algorithm not supported
return
self.file_props.hash_ = hash_
h.addHash(hash_, self.file_props.algo)
return h
def on_cert_received(self) -> None:
self.session.approve_session()
self.session.approve_content('file', name=self.name)
def __on_session_accept(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_session_accept')
if self.state == State.TRANSPORT_REPLACE:
# If we are requesting we don't have the file
if self.session.werequest:
raise nbxmpp.NodeProcessed
# We send the file
self.__state_changed(State.TRANSFERRING)
raise nbxmpp.NodeProcessed
self.file_props.streamhosts = self.transport.remote_candidates
# Calculate file hash in a new thread
# if we haven't sent the hash already.
if self.file_props.hash_ is None and self.file_props.algo and \
not self.werequest:
self.hash_thread = threading.Thread(target=self.__send_hash)
self.hash_thread.start()
for host in self.file_props.streamhosts:
host['initiator'] = self.session.initiator
host['target'] = self.session.responder
host['sid'] = self.file_props.sid
if self.transport.type_ == TransportType.SOCKS5:
sid = self.file_props.transport_sid
app.socks5queue.connect_to_hosts(self.session.connection.name,
sid,
self.on_connect,
self._on_connect_error,
receiving=False)
raise nbxmpp.NodeProcessed
self.__state_changed(State.TRANSFERRING)
raise nbxmpp.NodeProcessed
def __on_session_terminate(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_session_terminate')
def __on_session_info(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
pass
def __on_transport_accept(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_transport_accept')
def __on_transport_replace(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_transport_replace')
def __on_transport_reject(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_transport_reject')
def __on_transport_info(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_transport_info')
cand_error = content.getTag('transport').getTag('candidate-error')
cand_used = content.getTag('transport').getTag('candidate-used')
if (cand_error or cand_used) and \
self.state >= State.CAND_SENT_AND_RECEIVED:
raise nbxmpp.NodeProcessed
if cand_error:
if not app.socks5queue.listener.connections:
app.socks5queue.listener.disconnect()
self.nominated_cand['peer-cand'] = False
if self.state == State.CAND_SENT:
if not self.nominated_cand['our-cand'] and \
not self.nominated_cand['peer-cand']:
if not self.weinitiate:
return
self.__state_changed(State.TRANSPORT_REPLACE)
else:
response = stanza.buildReply('result')
response.delChild(response.getQuery())
self.session.connection.connection.send(response)
self.__state_changed(State.TRANSFERRING)
raise nbxmpp.NodeProcessed
else:
args = {'candError': True}
self.__state_changed(State.CAND_RECEIVED, args)
return
if cand_used:
streamhost_cid = cand_used.getAttr('cid')
streamhost_used = None
for cand in self.transport.candidates:
if cand['candidate_id'] == streamhost_cid:
streamhost_used = cand
break
if streamhost_used is None or streamhost_used['type'] == 'proxy':
if (app.socks5queue.listener and
not app.socks5queue.listener.connections):
app.socks5queue.listener.disconnect()
if content.getTag('transport').getTag('activated'):
self.state = State.TRANSFERRING
app.socks5queue.send_file(self.file_props,
self.session.connection.name, 'client')
return
args = {'content': content,
'sendCand': False}
if self.state == State.CAND_SENT:
self.__state_changed(State.CAND_SENT_AND_RECEIVED, args)
self.__state_changed(State.TRANSFERRING)
raise nbxmpp.NodeProcessed
self.__state_changed(State.CAND_RECEIVED, args)
def __on_iq_result(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
log.info('__on_iq_result')
if self.state in (State.NOT_STARTED, State.CAND_RECEIVED):
self.__state_changed(State.INITIALIZED)
elif self.state == State.CAND_SENT_AND_RECEIVED:
if (not self.nominated_cand['our-cand'] and
not self.nominated_cand['peer-cand']):
if not self.weinitiate:
return
self.__state_changed(State.TRANSPORT_REPLACE)
return
# initiate transfer
self.__state_changed(State.TRANSFERRING)
def __transport_setup(self,
stanza: nbxmpp.Node,
content: nbxmpp.Node,
error: nbxmpp.Node | None,
action: str
) -> None:
# Sets up a few transport specific things for the file transfer
if self.transport.type_ == TransportType.IBB:
# No action required, just set the state to transferring
self.state = State.TRANSFERRING
else:
self._listen_host()
def on_connect(self, streamhost):
'''
send candidate-used stanza
'''
log.info('send_candidate_used')
if streamhost is None:
return
args = {'streamhost': streamhost,
'sendCand': True}
self.nominated_cand['our-cand'] = streamhost
self.__send_candidate(args)
def _on_connect_error(self, sid: str) -> None:
log.info('connect error, sid=%s', sid)
args = {'candError': True,
'sendCand': True}
self.__send_candidate(args)
def __send_candidate(self, args: dict[str, Any]) -> None:
if self.state == State.CAND_RECEIVED:
self.__state_changed(State.CAND_SENT_AND_RECEIVED, args)
else:
self.__state_changed(State.CAND_SENT, args)
def _store_socks5_sid(self, sid: str, hash_id: str) -> None:
# callback from socsk5queue.start_listener
self.file_props.hash_ = hash_id
def _listen_host(self) -> None:
receiver = self.file_props.receiver
sender = self.file_props.sender
sha_str = helpers.get_auth_sha(self.file_props.sid, sender,
receiver)
self.file_props.sha_str = sha_str
port = app.settings.get('file_transfers_port')
listener = app.socks5queue.start_listener(
port,
sha_str,
self._store_socks5_sid,
self.file_props,
typ='sender' if self.weinitiate else 'receiver')
if not listener:
# send error message, notify the user
return
def is_our_candidate_used(self) -> bool:
'''
If this method returns true then the candidate we nominated will be
used, if false, the candidate nominated by peer will be used
'''
if not self.nominated_cand['peer-cand']:
return True
if not self.nominated_cand['our-cand']:
return False
peer_pr = int(self.nominated_cand['peer-cand']['priority'])
our_pr = int(self.nominated_cand['our-cand']['priority'])
if peer_pr != our_pr:
return our_pr > peer_pr
return self.weinitiate
def start_ibb_transfer(self) -> None:
if self.file_props.type_ == 's':
self.__state_changed(State.TRANSFERRING)
def get_content(desc) -> JingleFileTransfer:
return JingleFileTransfer
contents[Namespace.JINGLE_FILE_TRANSFER_5] = get_content
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