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# Copyright (C) 2020 Philipp Hörist <philipp AT hoerist.com>
#
# This file is part of nbxmpp.
#
# This program 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; 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <http://www.gnu.org/licenses/>.
from typing import Optional
import logging
from gi.repository import Gio
from nbxmpp.const import TCPState
from nbxmpp.util import Observable
from nbxmpp.util import LogAdapter
log = logging.getLogger('nbxmpp.connection')
class Connection(Observable):
'''
Base Connection Class
Signals:
data-sent
data-received
bad-certificate
connection-failed
disconnected
'''
def __init__(self,
log_context,
address,
accepted_certificates,
ignore_tls_errors,
ignored_tls_errors,
client_cert):
self._log = LogAdapter(log, {'context': log_context})
Observable.__init__(self, self._log)
self._client_cert = client_cert
self._address = address
self._local_address = None
self._remote_address = None
self._state = None
self._state = TCPState.DISCONNECTED
self._peer_certificate = None
self._peer_certificate_errors = None
self._accepted_certificates = accepted_certificates
self._ignore_tls_errors = ignore_tls_errors
self._ignored_tls_errors = ignored_tls_errors
@property
def tls_version(self) -> Optional[int]:
return None
@property
def ciphersuite(self) -> Optional[int]:
return None
@property
def local_address(self):
return self._local_address
@property
def remote_address(self):
return self._remote_address
@property
def peer_certificate(self):
return (self._peer_certificate, self._peer_certificate_errors)
@property
def connection_type(self):
return self._address.type
@property
def state(self):
return self._state
@state.setter
def state(self, value):
self._log.info('Set Connection State: %s', value)
self._state = value
def _accept_certificate(self):
if not self._peer_certificate_errors:
return True
self._log.info('Found TLS certificate errors: %s',
self._peer_certificate_errors)
if self._ignore_tls_errors:
self._log.warning('Ignore all errors')
return True
if self._ignored_tls_errors:
self._log.warning('Ignore TLS certificate errors: %s',
self._ignored_tls_errors)
self._peer_certificate_errors -= self._ignored_tls_errors
if Gio.TlsCertificateFlags.UNKNOWN_CA in self._peer_certificate_errors:
for accepted_certificate in self._accepted_certificates:
if self._peer_certificate.is_same(accepted_certificate):
self._peer_certificate_errors.discard(
Gio.TlsCertificateFlags.UNKNOWN_CA)
break
if not self._peer_certificate_errors:
return True
return False
def disconnect(self):
raise NotImplementedError
def connect(self):
raise NotImplementedError
def send(self, stanza, now=False):
raise NotImplementedError
def _log_stanza(self, data, received=True):
direction = 'RECEIVED' if received else 'SENT'
message = ('::::: DATA %s ::::\n\n%s\n')
self._log.info(message, direction, data)
def start_tls_negotiation(self):
raise NotImplementedError
def shutdown_output(self):
raise NotImplementedError
def shutdown_input(self):
raise NotImplementedError
def destroy(self):
self.remove_subscriptions()
self._peer_certificate = None
self._client_cert = None
self._address = None
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