553 lines
22 KiB
Python
553 lines
22 KiB
Python
# Copyright (C) 2006 Stefan Bethge <stefan@lanpartei.de>
|
|
#
|
|
# 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/>.
|
|
|
|
import logging
|
|
|
|
from gi.repository import Avahi
|
|
from gi.repository import Gio
|
|
from gi.repository import GLib
|
|
|
|
from gajim.common.i18n import _
|
|
from gajim.common.zeroconf.zeroconf import Constant, ConstantRI
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import DBUS_NAME
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import DBUS_INTERFACE_SERVER
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import DBUS_INTERFACE_ENTRY_GROUP
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import DBUS_INTERFACE_DOMAIN_BROWSER
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import ServerState
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import EntryGroup
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import DomainBrowser
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import Protocol
|
|
from gajim.common.zeroconf.zeroconf_avahi_const import Interface
|
|
|
|
log = logging.getLogger('gajim.c.z.zeroconf_avahi')
|
|
|
|
|
|
class Zeroconf:
|
|
def __init__(self, new_service_cb, remove_service_cb, name_conflict_cb,
|
|
disconnected_cb, error_cb, name, host, port):
|
|
self.domain = None # specific domain to browse
|
|
self.stype = '_presence._tcp'
|
|
self.port = port # listening port that gets announced
|
|
self.username = name
|
|
self.host = host
|
|
self.txt = {}
|
|
self.name = None
|
|
|
|
self.connected = False
|
|
self.announced = False
|
|
|
|
#XXX these CBs should be set to None when we destroy the object
|
|
# (go offline), because they create a circular reference
|
|
self._new_service_cb = new_service_cb
|
|
self._remove_service_cb = remove_service_cb
|
|
self._name_conflict_cb = name_conflict_cb
|
|
self._disconnected_cb = disconnected_cb
|
|
self._error_cb = error_cb
|
|
|
|
self._server = None
|
|
self._avahi_client = None
|
|
self._service_browser = None
|
|
self._domain_browser = None
|
|
self._entrygroup = None
|
|
|
|
self._sb_connections = []
|
|
self._connections = {}
|
|
|
|
self._contacts = {}
|
|
self._invalid_self_contact = {}
|
|
|
|
@staticmethod
|
|
def _call(proxy, method_name):
|
|
try:
|
|
output = proxy.call_sync(
|
|
method_name, None, Gio.DBusCallFlags.NONE, -1, None)
|
|
if output:
|
|
return output[0]
|
|
except GLib.Error as error:
|
|
log.debug(error)
|
|
return None
|
|
|
|
def _error_callback(self, error):
|
|
log.debug(error)
|
|
# timeouts are non-critical
|
|
if str(error) != 'Timeout reached':
|
|
self.disconnect()
|
|
self._disconnected_cb()
|
|
|
|
def _new_service_callback(self, _browser, interface, protocol, name, stype,
|
|
domain, _flags):
|
|
log.debug('Found service %s in domain %s on %i.%i.',
|
|
name, domain, interface, protocol)
|
|
if not self.connected:
|
|
return
|
|
|
|
# synchronous resolving
|
|
try:
|
|
output = self._server.call_sync(
|
|
'ResolveService',
|
|
GLib.Variant('(iisssiu)', (interface, protocol, name, stype,
|
|
domain, Protocol.UNSPEC, 0)),
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
self.service_resolved_callback(*output)
|
|
except GLib.Error as error:
|
|
log.debug('Error while resolving: %s', error)
|
|
|
|
def _remove_service_callback(self, _browser, interface, protocol, name,
|
|
_stype, domain, _flags):
|
|
log.debug('Service %s in domain %s on %i.%i disappeared.',
|
|
name, domain, interface, protocol)
|
|
if not self.connected:
|
|
return
|
|
if name == self.name:
|
|
return
|
|
|
|
for key in list(self._contacts.keys()):
|
|
val = self._contacts[key]
|
|
if val[Constant.BARE_NAME] == name:
|
|
# try to reduce instead of delete first
|
|
resolved_info = val[Constant.RESOLVED_INFO]
|
|
if len(resolved_info) > 1:
|
|
for i, _info in enumerate(resolved_info):
|
|
if resolved_info[i][ConstantRI.INTERFACE] == interface and resolved_info[i][ConstantRI.PROTOCOL] == protocol:
|
|
del self._contacts[key][Constant.RESOLVED_INFO][i]
|
|
# if still something left, don't remove
|
|
if len(self._contacts[key][Constant.RESOLVED_INFO]) > 1:
|
|
return
|
|
del self._contacts[key]
|
|
self._remove_service_cb(key)
|
|
return
|
|
|
|
def _new_service_type(self, interface, protocol, stype, domain, _flags):
|
|
# Are we already browsing this domain for this type?
|
|
if self._service_browser:
|
|
return
|
|
|
|
self._service_browser = Avahi.ServiceBrowser.new_full(
|
|
interface, protocol, stype, domain, 0)
|
|
|
|
self._avahi_client = Avahi.Client(flags=0,)
|
|
self._avahi_client.start()
|
|
con = self._service_browser.connect('new_service',
|
|
self._new_service_callback)
|
|
self._sb_connections.append(con)
|
|
con = self._service_browser.connect('removed_service',
|
|
self._remove_service_callback)
|
|
self._sb_connections.append(con)
|
|
con = self._service_browser.connect('failure', self._error_callback)
|
|
self._sb_connections.append(con)
|
|
|
|
self._service_browser.attach(self._avahi_client)
|
|
|
|
def _new_domain_callback(self, interface, protocol, domain, _flags):
|
|
if domain != 'local':
|
|
self._browse_domain(interface, protocol, domain)
|
|
|
|
@staticmethod
|
|
def txt_array_to_dict(txt_array):
|
|
txt_dict = {}
|
|
for array in txt_array:
|
|
item = bytes(array)
|
|
item = item.decode('utf-8')
|
|
item = item.split('=', 1)
|
|
|
|
if item[0] and (item[0] not in txt_dict):
|
|
if len(item) == 1:
|
|
txt_dict[item[0]] = None
|
|
else:
|
|
txt_dict[item[0]] = item[1]
|
|
|
|
return txt_dict
|
|
|
|
@staticmethod
|
|
def dict_to_txt_array(txt_dict):
|
|
array = []
|
|
|
|
for key, value in txt_dict.items():
|
|
item = '%s=%s' % (key, value)
|
|
item = item.encode('utf-8')
|
|
array.append(item)
|
|
|
|
return array
|
|
|
|
def service_resolved_callback(self, interface, protocol, name, _stype,
|
|
domain, host, aprotocol, address, port, txt,
|
|
_flags):
|
|
log.debug('Service data for service %s in domain %s on %i.%i:',
|
|
name, domain, interface, protocol)
|
|
log.debug('Host %s (%s), port %i, TXT data: %s',
|
|
host, address, port, self.txt_array_to_dict(txt))
|
|
if not self.connected:
|
|
return
|
|
bare_name = name
|
|
if name.find('@') == -1:
|
|
name = name + '@' + name
|
|
|
|
# we don't want to see ourselves in the list
|
|
if name != self.name:
|
|
resolved_info = [(interface, protocol, host,
|
|
aprotocol, address, int(port))]
|
|
if name in self._contacts:
|
|
# Decide whether to try to merge with existing resolved info:
|
|
old_name, old_domain, old_resolved_info, old_bare_name, _old_txt = self._contacts[name]
|
|
if name == old_name and domain == old_domain and bare_name == old_bare_name:
|
|
# Seems similar enough, try to merge resolved info:
|
|
for i, _info in enumerate(old_resolved_info):
|
|
# for now, keep a single record for each (interface, protocol) pair
|
|
#
|
|
# Note that, theoretically, we could both get IPv4 and
|
|
# IPv6 aprotocol responses via the same protocol,
|
|
# so this probably needs to be revised again.
|
|
if old_resolved_info[i][0:2] == (interface, protocol):
|
|
log.debug('Deleting resolved info for interface %s',
|
|
old_resolved_info[i])
|
|
del old_resolved_info[i]
|
|
break
|
|
resolved_info = resolved_info + old_resolved_info
|
|
log.debug('Collected resolved info is now: %s',
|
|
resolved_info)
|
|
self._contacts[name] = (name, domain, resolved_info, bare_name, txt)
|
|
self._new_service_cb(name)
|
|
else:
|
|
# remember data
|
|
# In case this is not our own record but of another
|
|
# gajim instance on the same machine,
|
|
# it will be used when we get a new name.
|
|
self._invalid_self_contact[name] = (
|
|
name,
|
|
domain,
|
|
(interface, protocol, host, aprotocol, address, int(port)),
|
|
bare_name,
|
|
txt)
|
|
|
|
def _service_resolved_all_callback(self, _interface, _protocol, name,
|
|
_stype, _domain, _host, _aprotocol,
|
|
_address, _port, txt, _flags):
|
|
if not self.connected:
|
|
return
|
|
|
|
if name.find('@') == -1:
|
|
name = name + '@' + name
|
|
# update TXT data only, as intended according to resolve_all comment
|
|
old_contact = self._contacts[name]
|
|
self._contacts[name] = old_contact[0:Constant.TXT] + (txt,) + old_contact[Constant.TXT+1:]
|
|
|
|
def _service_add_fail_callback(self, err):
|
|
log.debug('Error while adding service. %s', str(err))
|
|
if 'Local name collision' in str(err):
|
|
alternative_name = self._server.call_sync(
|
|
'GetAlternativeServiceName',
|
|
GLib.Variant('(s)', (self.username,)),
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
self._name_conflict_cb(alternative_name[0])
|
|
return
|
|
self._error_cb(_('Error while adding service. %s') % str(err))
|
|
self.disconnect()
|
|
|
|
def _server_state_changed_callback(self, _connection, _sender_name,
|
|
_object_path, _interface_name,
|
|
_signal_name, parameters):
|
|
state, _ = parameters
|
|
log.debug('server state changed to %s', state)
|
|
if state == ServerState.RUNNING:
|
|
self._create_service()
|
|
elif state in (ServerState.COLLISION,
|
|
ServerState.REGISTERING):
|
|
self.disconnect()
|
|
if self._entrygroup:
|
|
self._call(self._entrygroup, 'Reset')
|
|
|
|
def _entrygroup_state_changed_callback(self, _connection, _sender_name,
|
|
_object_path, _interface_name,
|
|
_signal_name, parameters):
|
|
state, _ = parameters
|
|
# the name is already present, so recreate
|
|
if state == EntryGroup.COLLISION:
|
|
log.debug('zeroconf.py: local name collision')
|
|
self._service_add_fail_callback('Local name collision')
|
|
elif state == EntryGroup.FAILURE:
|
|
self.disconnect()
|
|
self._call(self._entrygroup, 'Reset')
|
|
log.debug('zeroconf.py: ENTRY_GROUP_FAILURE reached (that '
|
|
'should not happen)')
|
|
|
|
@staticmethod
|
|
def _replace_show(show):
|
|
if show in ['chat', 'online', '']:
|
|
return 'avail'
|
|
if show == 'xa':
|
|
return 'away'
|
|
return show
|
|
|
|
def avahi_txt(self):
|
|
return self.dict_to_txt_array(self.txt)
|
|
|
|
def _create_service(self):
|
|
try:
|
|
if not self._entrygroup:
|
|
# create an EntryGroup for publishing
|
|
object_path = self._server.call_sync(
|
|
'EntryGroupNew', None, Gio.DBusCallFlags.NONE, -1, None)
|
|
|
|
self._entrygroup = Gio.DBusProxy.new_for_bus_sync(
|
|
Gio.BusType.SYSTEM, Gio.DBusProxyFlags.NONE, None,
|
|
DBUS_NAME, *object_path, DBUS_INTERFACE_ENTRY_GROUP, None)
|
|
|
|
connection = self._entrygroup.get_connection()
|
|
subscription = connection.signal_subscribe(
|
|
DBUS_NAME, DBUS_INTERFACE_ENTRY_GROUP, 'StateChanged',
|
|
*object_path, None, Gio.DBusSignalFlags.NONE,
|
|
self._entrygroup_state_changed_callback)
|
|
|
|
self._connections[connection] = [subscription]
|
|
|
|
txt = {}
|
|
|
|
# remove empty keys
|
|
for key, val in self.txt.items():
|
|
if val:
|
|
txt[key] = val
|
|
|
|
txt['port.p2pj'] = self.port
|
|
txt['version'] = 1
|
|
txt['txtvers'] = 1
|
|
|
|
# replace gajim's show messages with compatible ones
|
|
if 'status' in self.txt:
|
|
txt['status'] = self._replace_show(self.txt['status'])
|
|
else:
|
|
txt['status'] = 'avail'
|
|
|
|
self.txt = txt
|
|
log.debug('Publishing service %s of type %s',
|
|
self.name, self.stype)
|
|
|
|
try:
|
|
self._entrygroup.call_sync(
|
|
'AddService',
|
|
GLib.Variant('(iiussssqaay)', (Interface.UNSPEC,
|
|
Protocol.UNSPEC, 0,
|
|
self.name, self.stype, '',
|
|
'', self.port,
|
|
self.avahi_txt())),
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
except GLib.Error as error:
|
|
self._service_add_fail_callback(error)
|
|
return False
|
|
|
|
try:
|
|
self._entrygroup.call_sync('Commit', None,
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
except GLib.Error as error:
|
|
pass
|
|
|
|
return True
|
|
except GLib.Error as error:
|
|
log.debug(error)
|
|
return False
|
|
|
|
def announce(self):
|
|
if not self.connected:
|
|
return False
|
|
|
|
state = self._server.call_sync(
|
|
'GetState', None, Gio.DBusCallFlags.NONE, -1, None)
|
|
|
|
if state[0] == ServerState.RUNNING:
|
|
if self._create_service():
|
|
self.announced = True
|
|
return True
|
|
return False
|
|
return None
|
|
|
|
def remove_announce(self):
|
|
if self.announced is False:
|
|
return False
|
|
|
|
if self._call(self._entrygroup, 'GetState') != EntryGroup.FAILURE:
|
|
self._call(self._entrygroup, 'Reset')
|
|
self._call(self._entrygroup, 'Free')
|
|
self._entrygroup = None
|
|
self.announced = False
|
|
|
|
return True
|
|
return False
|
|
|
|
def _browse_domain(self, interface, protocol, domain):
|
|
self._new_service_type(interface, protocol, self.stype, domain, '')
|
|
|
|
def _avahi_dbus_connect_cb(self, connection, sender_name, object_path,
|
|
interface_name, signal_name, parameters):
|
|
name, old_owner, new_owner = parameters
|
|
if name == DBUS_NAME:
|
|
if new_owner and not old_owner:
|
|
log.debug('We are connected to avahi-daemon')
|
|
else:
|
|
log.debug('Lost connection to avahi-daemon')
|
|
self.disconnect()
|
|
if self._disconnected_cb:
|
|
self._disconnected_cb()
|
|
|
|
def _connect_dbus(self):
|
|
try:
|
|
proxy = Gio.DBusProxy.new_for_bus_sync(
|
|
Gio.BusType.SYSTEM, Gio.DBusProxyFlags.NONE, None,
|
|
'org.freedesktop.DBus', '/org/freedesktop/DBus',
|
|
'org.freedesktop.DBus', None)
|
|
|
|
connection = proxy.get_connection()
|
|
subscription = connection.signal_subscribe(
|
|
'org.freedesktop.DBus', 'org.freedesktop.DBus',
|
|
'NameOwnerChanged', '/org/freedesktop/DBus', None,
|
|
Gio.DBusSignalFlags.NONE, self._avahi_dbus_connect_cb)
|
|
self._connections[connection] = [subscription]
|
|
except GLib.Error as error:
|
|
log.debug(error)
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
def _connect_avahi(self):
|
|
if not self._connect_dbus():
|
|
return False
|
|
|
|
if self._server:
|
|
return True
|
|
try:
|
|
self._server = Gio.DBusProxy.new_for_bus_sync(
|
|
Gio.BusType.SYSTEM, Gio.DBusProxyFlags.NONE, None,
|
|
DBUS_NAME, '/', DBUS_INTERFACE_SERVER, None)
|
|
|
|
connection = self._server.get_connection()
|
|
subscription = connection.signal_subscribe(
|
|
DBUS_NAME, DBUS_INTERFACE_SERVER, 'StateChanged', '/', None,
|
|
Gio.DBusSignalFlags.NONE, self._server_state_changed_callback)
|
|
self._connections[connection] = [subscription]
|
|
except Exception as error:
|
|
# Avahi service is not present
|
|
self._server = None
|
|
log.debug(error)
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
def connect(self):
|
|
self.name = self.username + '@' + self.host # service name
|
|
if not self._connect_avahi():
|
|
return False
|
|
|
|
self.connected = True
|
|
# start browsing
|
|
if self.domain is None:
|
|
# Explicitly browse .local
|
|
self._browse_domain(
|
|
Interface.UNSPEC, Protocol.UNSPEC, 'local')
|
|
|
|
# Browse for other browsable domains
|
|
object_path = self._server.call_sync(
|
|
'DomainBrowserNew',
|
|
GLib.Variant('(iisiu)', (Interface.UNSPEC, Protocol.UNSPEC, '',
|
|
DomainBrowser.BROWSE, 0)),
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
|
|
self._domain_browser = Gio.DBusProxy.new_for_bus_sync(
|
|
Gio.BusType.SYSTEM, Gio.DBusProxyFlags.NONE, None, DBUS_NAME,
|
|
*object_path, DBUS_INTERFACE_DOMAIN_BROWSER, None)
|
|
|
|
connection = self._domain_browser.get_connection()
|
|
subscription = connection.signal_subscribe(
|
|
DBUS_NAME, DBUS_INTERFACE_DOMAIN_BROWSER, 'ItemNew',
|
|
*object_path, None, Gio.DBusSignalFlags.NONE,
|
|
self._new_domain_callback)
|
|
self._connections[connection] = [subscription]
|
|
|
|
subscription = connection.signal_subscribe(
|
|
DBUS_NAME, DBUS_INTERFACE_DOMAIN_BROWSER, 'Failure',
|
|
*object_path, None, Gio.DBusSignalFlags.NONE,
|
|
self._error_callback)
|
|
self._connections[connection].append(subscription)
|
|
else:
|
|
self._browse_domain(
|
|
Interface.UNSPEC, Protocol.UNSPEC, self.domain)
|
|
|
|
return True
|
|
|
|
def disconnect(self):
|
|
if self.connected:
|
|
self.connected = False
|
|
for connection, subscriptions in self._connections.items():
|
|
for subscription in subscriptions:
|
|
connection.signal_unsubscribe(subscription)
|
|
for con in self._sb_connections:
|
|
self._service_browser.disconnect(con)
|
|
if self._domain_browser:
|
|
self._call(self._domain_browser, 'Free')
|
|
self.remove_announce()
|
|
self._server = None
|
|
self._service_browser = None
|
|
self._domain_browser = None
|
|
|
|
# refresh txt data of all contacts manually (no callback available)
|
|
def resolve_all(self):
|
|
if not self.connected:
|
|
return False
|
|
for val in self._contacts.values():
|
|
# get txt data from last recorded resolved info
|
|
# TODO: Better try to get it from last IPv6 mDNS, then last IPv4?
|
|
ri = val[Constant.RESOLVED_INFO][0]
|
|
output = self._server.call_sync(
|
|
'ResolveService',
|
|
GLib.Variant('(iisssiu)', (ri[ConstantRI.INTERFACE],
|
|
ri[ConstantRI.PROTOCOL],
|
|
val[Constant.BARE_NAME],
|
|
self.stype, val[Constant.DOMAIN],
|
|
Protocol.UNSPEC,
|
|
0)),
|
|
Gio.DBusCallFlags.NONE,
|
|
-1,
|
|
None
|
|
)
|
|
self._service_resolved_all_callback(*output)
|
|
|
|
return True
|
|
|
|
def get_contacts(self):
|
|
return self._contacts
|
|
|
|
def get_contact(self, jid):
|
|
if not jid in self._contacts:
|
|
return None
|
|
return self._contacts[jid]
|
|
|
|
def update_txt(self, show=None):
|
|
if show:
|
|
self.txt['status'] = self._replace_show(show)
|
|
|
|
txt = self.avahi_txt()
|
|
if self.connected and self._entrygroup:
|
|
try:
|
|
self._entrygroup.call_sync(
|
|
'UpdateServiceTxt',
|
|
GLib.Variant('(iiusssaay)', (Interface.UNSPEC,
|
|
Protocol.UNSPEC, 0, self.name,
|
|
self.stype, '', txt)),
|
|
Gio.DBusCallFlags.NONE, -1, None)
|
|
except GLib.Error as error:
|
|
self._error_callback(error)
|
|
return False
|
|
|
|
return True
|
|
return False
|