Switch sugar/presence module over to a thin API wrapper around the PresenceService dbus API
This commit is contained in:
Dan Williams
parent
d2fdd64003
commit
766b82d467
@ -3,9 +3,6 @@ import random
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import base64
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from sugar import env
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from sugar.presence import Service
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from sugar.presence import Buddy
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from sugar.presence import PresenceService
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from sugar.p2p import Stream
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class ShellOwner(object):
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99
sugar/presence/Activity.py
Normal file
99
sugar/presence/Activity.py
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@ -0,0 +1,99 @@
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import gobject
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import dbus, dbus_bindings
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class Activity(gobject.GObject):
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__gsignals__ = {
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'BuddyJoined': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'BuddyLeft': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'ServiceAppeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'ServiceDisappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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_PRESENCE_SERVICE = "org.laptop.Presence"
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_ACTIVITY_DBUS_INTERFACE = "org.laptop.Presence.Activity"
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def __init__(self, bus, new_obj_cb, del_obj_cb, object_path):
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gobject.GObject.__init__(self)
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self._object_path = object_path
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self._ps_new_object = new_obj_cb
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self._ps_del_object = del_obj_cb
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bobj = bus.get_object(self._PRESENCE_SERVICE, object_path)
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self._activity = dbus.Interface(bobj, self._ACTIVITY_DBUS_INTERFACE)
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self._activity.connect_to_signal('BuddyJoined', self._buddy_joined_cb)
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self._activity.connect_to_signal('BuddyLeft', self._buddy_left_cb)
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self._activity.connect_to_signal('ServiceAppeared', self._service_appeared_cb)
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self._activity.connect_to_signal('ServiceDisappeared', self._service_disappeared_cb)
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def object_path(self):
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return self._object_path
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def _emit_buddy_joined_signal(self, object_path):
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self.emit('BuddyJoined', self._ps_new_object(object_path))
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return False
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def _buddy_joined_cb(self, object_path):
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gobject.idle_add(self._emit_buddy_joined_signal, object_path)
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def _emit_buddy_left_signal(self, object_path):
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self.emit('BuddyLeft', self._ps_new_object(object_path))
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return False
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def _buddy_left_cb(self, object_path):
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gobject.idle_add(self._emit_buddy_left_signal, object_path)
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def _emit_service_appeared_signal(self, object_path):
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self.emit('ServiceAppeared', self._ps_new_object(object_path))
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return False
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def _service_appeared_cb(self, object_path):
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gobject.idle_add(self._emit_service_appeared_signal, object_path)
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def _emit_service_disappeared_signal(self, object_path):
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self.emit('ServiceDisappeared', self._ps_new_object(object_path))
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return False
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def _service_disappeared_cb(self, object_path):
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gobject.idle_add(self._emit_service_disappeared_signal, object_path)
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def getId(self):
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return self._activity.getId()
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def getIcon(self):
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return self._buddy.getIcon()
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def getServiceOfType(self, stype):
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try:
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object_path = self._buddy.getServiceOfType(stype)
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except dbus_bindings.DBusException:
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return None
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return self._ps_new_object(object_path)
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def getServices(self):
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resp = self._activity.getServices()
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servs = []
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for item in resp:
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servs.append(self._ps_new_object(item))
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return servs
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def getServicesOfType(self, stype):
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resp = self._activity.getServicesOfType(stype)
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servs = []
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for item in resp:
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servs.append(self._ps_new_object(item))
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return servs
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def getJoinedBuddies(self):
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resp = self._activity.getJoinedBuddies(stype)
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buddies = []
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for item in resp:
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buddies.append(self._ps_new_object(item))
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return buddies
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def ownerHasJoined(self):
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# FIXME
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return False
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@ -1,189 +1,94 @@
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import base64
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import logging
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import gtk
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import gobject
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from sugar.p2p import Stream
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from sugar.p2p import network
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from sugar.presence import Service
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PRESENCE_SERVICE_TYPE = "_presence_olpc._tcp"
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import dbus, dbus_bindings
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class Buddy(gobject.GObject):
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"""Represents another person on the network and keeps track of the
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activities and resources they make available for sharing."""
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__gsignals__ = {
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'icon-changed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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'IconChanged': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([])),
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'service-added': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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'ServiceAppeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'service-removed': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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'ServiceDisappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'joined-activity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_STRING])),
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'left-activity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_STRING]))
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'JoinedActivity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT])),
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'LeftActivity': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
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([gobject.TYPE_PYOBJECT]))
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}
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def __init__(self, service):
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_PRESENCE_SERVICE = "org.laptop.Presence"
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_BUDDY_DBUS_INTERFACE = "org.laptop.Presence.Buddy"
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def __init__(self, bus, new_obj_cb, del_obj_cb, object_path):
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gobject.GObject.__init__(self)
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self._services = {}
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self._nick_name = service.get_name()
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self._address = service.get_publisher_address()
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self._valid = False
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self._icon = None
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self._icon_tries = 0
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self._owner = False
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self.add_service(service)
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self._object_path = object_path
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self._ps_new_object = new_obj_cb
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self._ps_del_object = del_obj_cb
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bobj = bus.get_object(self._PRESENCE_SERVICE, object_path)
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self._buddy = dbus.Interface(bobj, self._BUDDY_DBUS_INTERFACE)
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self._buddy.connect_to_signal('IconChanged', self._icon_changed_cb)
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self._buddy.connect_to_signal('ServiceAppeared', self._service_appeared_cb)
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self._buddy.connect_to_signal('ServiceDisappeared', self._service_disappeared_cb)
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self._buddy.connect_to_signal('JoinedActivity', self._joined_activity_cb)
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self._buddy.connect_to_signal('LeftActivity', self._left_activity_cb)
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def _request_buddy_icon_cb(self, result_status, response, user_data):
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"""Callback when icon request has completed."""
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icon = response
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service = user_data
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if result_status == network.RESULT_SUCCESS:
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if icon and len(icon):
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icon = base64.b64decode(icon)
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print "Buddy icon for '%s' is size %d" % (self._nick_name, len(icon))
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self.set_icon(icon)
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def object_path(self):
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return self._object_path
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if (result_status == network.RESULT_FAILED or not icon) and self._icon_tries < 3:
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self._icon_tries = self._icon_tries + 1
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print "Failed to retrieve buddy icon for '%s' on try %d of %d" % (self._nick_name, \
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self._icon_tries, 3)
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gobject.timeout_add(1000, self._request_buddy_icon, service)
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def _emit_icon_changed_signal(self):
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self.emit('IconChanged')
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return False
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def _request_buddy_icon(self, service):
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"""Contact the buddy to retrieve the buddy icon."""
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buddy_stream = Stream.Stream.new_from_service(service, start_reader=False)
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writer = buddy_stream.new_writer(service)
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success = writer.custom_request("get_buddy_icon", self._request_buddy_icon_cb, service)
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if not success:
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del writer, buddy_stream
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gobject.timeout_add(1000, self._request_buddy_icon, service)
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def _icon_changed_cb(self):
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gobject.idle_add(self._emit_icon_changed_signal)
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def _emit_service_appeared_signal(self, object_path):
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self.emit('ServiceAppeared', self._ps_new_object(object_path))
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return False
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def add_service(self, service):
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"""Adds a new service to this buddy's service list, returning
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True if the service was successfully added, and False if it was not."""
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if service.get_name() != self._nick_name:
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return False
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publisher_addr = service.get_publisher_address()
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if publisher_addr != self._address:
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logging.error('Service publisher and buddy address doesnt match: %s %s' % (publisher_addr, self._address))
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return False
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stype = service.get_type()
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if stype in self._services.keys():
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return False
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self._services[stype] = service
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if self._valid:
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self.emit("service-added", service)
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def _service_appeared_cb(self, object_path):
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gobject.idle_add(self._emit_service_appeared_signal, object_path)
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# If this is the first service we've seen that's owned by
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# a particular activity, send out the 'joined-activity' signal
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actid = service.get_activity_id()
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if actid is not None:
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found = False
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for serv in self._services.values():
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if serv.get_activity_id() == actid and serv.get_type() != stype:
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found = True
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break
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if not found:
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print "Buddy (%s) joined activity %s." % (self._nick_name, actid)
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self.emit("joined-activity", service)
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def _emit_service_disappeared_signal(self, object_path):
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self.emit('ServiceDisappeared', self._ps_new_object(object_path))
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return False
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if stype == PRESENCE_SERVICE_TYPE:
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# A buddy isn't valid until its official presence
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# service has been found and resolved
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self._valid = True
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print 'Requesting buddy icon %s' % self._nick_name
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self._request_buddy_icon(service)
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return True
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def _service_disappeared_cb(self, object_path):
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gobject.idle_add(self._emit_service_disappeared_signal, object_path)
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def remove_service(self, service):
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"""Remove a service from a buddy; ie, the activity was closed
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or the buddy went away."""
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if service.get_publisher_address() != self._address:
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return
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if service.get_name() != self._nick_name:
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return
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stype = service.get_type()
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if self._services.has_key(stype):
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if self._valid:
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self.emit("service-removed", service)
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del self._services[stype]
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def _emit_joined_activity_signal(self, object_path):
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self.emit('JoinedActivity', self._ps_new_object(object_path))
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return False
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# If this is the lase service owned by a particular activity,
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# and it's just been removed, send out the 'left-actvity' signal
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actid = service.get_activity_id()
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if actid is not None:
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found = False
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for serv in self._services.values():
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if serv.get_activity_id() == actid:
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found = True
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break
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if not found:
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print "Buddy (%s) left activity %s." % (self._nick_name, actid)
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self.emit("left-activity", service)
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def _joined_activity_cb(self, object_path):
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gobject.idle_add(self._emit_joined_activity_signal, object_path)
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if stype == PRESENCE_SERVICE_TYPE:
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self._valid = False
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def _emit_left_activity_signal(self, object_path):
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self.emit('LeftActivity', self._ps_new_object(object_path))
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return False
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def get_service_of_type(self, stype=None, activity=None):
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"""Return a service of a certain type, or None if the buddy
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doesn't provide that service."""
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if not stype:
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raise RuntimeError("Need to specify a service type.")
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def _left_activity_cb(self, object_path):
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gobject.idle_add(self._emit_left_activity_signal, object_path)
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if activity:
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actid = activity.get_id()
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for service in self._services.values():
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if service.get_type() == stype and service.get_activity_id() == actid:
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return service
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if self._services.has_key(stype):
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return self._services[stype]
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return None
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def getProperties(self):
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return self._buddy.getProperties()
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def is_valid(self):
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"""Return whether the buddy is valid or not. A buddy is
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not valid until its official presence service has been found
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and successfully resolved."""
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return self._valid
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def getIcon(self):
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return self._buddy.getIcon()
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def get_icon_pixbuf(self):
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if self._icon:
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pbl = gtk.gdk.PixbufLoader()
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pbl.write(self._icon)
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pbl.close()
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return pbl.get_pixbuf()
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else:
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def getServiceOfType(self, stype):
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try:
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object_path = self._buddy.getServiceOfType(stype)
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except dbus_bindings.DBusException:
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return None
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return self._ps_new_object(object_path)
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def get_icon(self):
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"""Return the buddies icon, if any."""
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return self._icon
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def get_address(self):
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return self._address
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def get_nick_name(self):
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return self._nick_name
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def set_icon(self, icon):
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"""Can only set icon for other buddies. The Owner
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takes care of setting it's own icon."""
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if icon != self._icon:
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self._icon = icon
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self.emit("icon-changed")
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def is_owner(self):
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return self._owner
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class Owner(Buddy):
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"""Class representing the owner of the machine. This is the client
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portion of the Owner, paired with the server portion in Owner.py."""
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def __init__(self, service):
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Buddy.__init__(self, service)
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self._owner = True
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def getJoinedActivities(self):
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try:
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resp = self._buddy.getJoinedActivities()
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except dbus_bindings.DBusException:
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return []
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acts = []
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for item in resp:
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acts.append(self._ps_new_object(item))
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return acts
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@ -1,6 +1,7 @@
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sugardir = $(pythondir)/sugar/presence
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sugar_PYTHON = \
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__init__.py \
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Activity.py \
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Buddy.py \
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PresenceService.py \
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Service.py
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@ -1,638 +1,176 @@
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import threading
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import avahi, dbus, dbus.glib, dbus.dbus_bindings, gobject
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import Buddy
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import Service
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import random
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import logging
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from sugar import env
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import dbus, dbus.glib, dbus.dbus_bindings, gobject
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def _get_local_ip_address(ifname):
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"""Call Linux specific bits to retrieve our own IP address."""
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import socket
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import sys
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import fcntl
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import Buddy, Service, Activity
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addr = None
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SIOCGIFADDR = 0x8915
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sockfd = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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try:
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ifreq = (ifname + '\0'*32)[:32]
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result = fcntl.ioctl(sockfd.fileno(), SIOCGIFADDR, ifreq)
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addr = socket.inet_ntoa(result[20:24])
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except IOError, exc:
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print "Error getting IP address: %s" % exc
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sockfd.close()
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return addr
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class ObjectCache(object):
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def __init__(self):
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self._cache = {}
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def get(self, object_path):
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try:
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return self._cache[object_path]
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except KeyError:
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return None
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class ServiceAdv(object):
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"""Wrapper class for service attributes that Avahi passes back."""
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def __init__(self, interface, protocol, name, stype, domain):
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self._interface = interface
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self._protocol = protocol
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self._name = name
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self._stype = stype
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self._domain = domain
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self._service = None
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self._resolved = False
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def interface(self):
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return self._interface
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def protocol(self):
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return self._protocol
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def name(self):
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return self._name
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def stype(self):
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return self._stype
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def domain(self):
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return self._domain
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def service(self):
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return self._service
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def set_service(self, service):
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if not isinstance(service, Service.Service):
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raise ValueError("must be a valid service.")
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self._service = service
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def resolved(self):
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return self._resolved
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def set_resolved(self, resolved):
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self._resolved = resolved
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def add(self, obj):
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op = obj.object_path()
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if not self._cache.has_key(op):
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self._cache[op] = obj
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def remove(self, object_path):
|
||||
if self._cache.has_key(object_path):
|
||||
del self._cache[object_path]
|
||||
|
||||
class PresenceService(gobject.GObject):
|
||||
"""Object providing information about the presence of Buddies
|
||||
and what activities they make available to others."""
|
||||
|
||||
__gsignals__ = {
|
||||
'buddy-appeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
'BuddyAppeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT])),
|
||||
'buddy-disappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
'BuddyDisappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT])),
|
||||
'service-appeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
|
||||
'service-disappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
|
||||
'activity-announced': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
|
||||
'new-service-adv': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_STRING, gobject.TYPE_STRING]))
|
||||
'ServiceAppeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT])),
|
||||
'ServiceDisappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT])),
|
||||
'ActivityAppeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT])),
|
||||
'ActivityDisappeared': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
|
||||
([gobject.TYPE_PYOBJECT]))
|
||||
}
|
||||
|
||||
__lock = threading.Lock()
|
||||
__instance = None
|
||||
|
||||
def get_instance():
|
||||
"""Return, creating if needed, the singleton PresenceService
|
||||
object."""
|
||||
PresenceService.__lock.acquire()
|
||||
if not PresenceService.__instance:
|
||||
PresenceService.__instance = PresenceService()
|
||||
PresenceService.__lock.release()
|
||||
return PresenceService.__instance
|
||||
get_instance = staticmethod(get_instance)
|
||||
_PRESENCE_SERVICE = "org.laptop.Presence"
|
||||
_PRESENCE_DBUS_INTERFACE = "org.laptop.Presence"
|
||||
_PRESENCE_OBJECT_PATH = "/org/laptop/Presence"
|
||||
_PS_BUDDY_OP = _PRESENCE_OBJECT_PATH + "/Buddies/"
|
||||
_PS_SERVICE_OP = _PRESENCE_OBJECT_PATH + "/Services/"
|
||||
_PS_ACTIVITY_OP = _PRESENCE_OBJECT_PATH + "/Activities/"
|
||||
|
||||
|
||||
def __init__(self):
|
||||
gobject.GObject.__init__(self)
|
||||
self._obcache = ObjectCache()
|
||||
self._bus = dbus.SessionBus()
|
||||
self._ps = dbus.Interface(self._bus.get_object(self._PRESENCE_SERVICE,
|
||||
self._PRESENCE_OBJECT_PATH), self._PRESENCE_DBUS_INTERFACE)
|
||||
self._ps.connect_to_signal('BuddyAppeared', self._buddy_appeared_cb)
|
||||
self._ps.connect_to_signal('BuddyDisappeared', self._buddy_disappeared_cb)
|
||||
|
||||
self._lock = threading.Lock()
|
||||
self._started = False
|
||||
def _new_object(self, object_path):
|
||||
obj = self._objcache.get(object_path)
|
||||
if not obj:
|
||||
if object_path.startswith(self._PS_SERVICE_OP):
|
||||
obj = Service.Service(self._bus, self._new_object,
|
||||
self._del_object, object_path)
|
||||
elif object_path.startswith(self._PS_BUDDY_OP):
|
||||
obj = Buddy.Buddy(self._bus, self._new_object,
|
||||
self._del_object, object_path)
|
||||
elif object_path.startswith(self._PS_ACTIVITY_OP):
|
||||
obj = Activity.Activity(self._bus, self._new_object,
|
||||
self._del_object, object_path)
|
||||
else:
|
||||
raise RuntimeError("Unknown object type")
|
||||
self._objcache.add(obj)
|
||||
return obj
|
||||
|
||||
# interface -> IP address: interfaces we've gotten events on so far
|
||||
self._local_addrs = {}
|
||||
def _del_object(self, object_path):
|
||||
# FIXME
|
||||
pass
|
||||
|
||||
# nick -> Buddy: buddies we've found
|
||||
self._buddies = {}
|
||||
# Our owner object
|
||||
self._owner = None
|
||||
def _emit_buddy_appeared_signal(self, object_path):
|
||||
self.emit('BuddyAppeared', self._new_object(object_path))
|
||||
return False
|
||||
|
||||
# activity ID -> Service: services grouped by activity ID
|
||||
self._activity_services = {}
|
||||
def _buddy_appeared_cb(self, op):
|
||||
gobject.idle_add(self._emit_buddy_appeared_signal, op)
|
||||
|
||||
# All the mdns service types we care about
|
||||
self._allowed_service_types = [] # Short service type
|
||||
def _emit_buddy_disappeared_signal(self, object_path):
|
||||
self.emit('BuddyDisappeared', self._ps_new_object(object_path))
|
||||
return False
|
||||
|
||||
# Keep track of stuff we're already browsing with ZC
|
||||
self._service_type_browsers = {}
|
||||
self._service_browsers = {}
|
||||
self._resolve_queue = [] # Track resolve requests
|
||||
def _buddy_disappeared_cb(self, object_path):
|
||||
gobject.idle_add(self._emit_buddy_disappeared_signal, object_path)
|
||||
|
||||
# Resolved service list
|
||||
self._service_advs = []
|
||||
def _emit_service_appeared_signal(self, object_path):
|
||||
self.emit('ServiceAppeared', self._ps_new_object(object_path))
|
||||
return False
|
||||
|
||||
self._bus = dbus.SystemBus()
|
||||
self._server = dbus.Interface(self._bus.get_object(avahi.DBUS_NAME,
|
||||
avahi.DBUS_PATH_SERVER), avahi.DBUS_INTERFACE_SERVER)
|
||||
def _service_appeared_cb(self, object_path):
|
||||
gobject.idle_add(self._emit_service_appeared_signal, object_path)
|
||||
|
||||
def get_service(self, stype):
|
||||
"""Find a particular service by full service type."""
|
||||
services = self._find_service_adv(stype=stype)
|
||||
if len(services) > 0:
|
||||
return services[0]
|
||||
else:
|
||||
def _emit_service_disappeared_signal(self, object_path):
|
||||
self.emit('ServiceDisappeared', self._ps_new_object(object_path))
|
||||
return False
|
||||
|
||||
def _service_disappeared_cb(self, object_path):
|
||||
gobject.idle_add(self._emit_service_disappeared_signal, object_path)
|
||||
|
||||
def _emit_activity_appeared_signal(self, object_path):
|
||||
self.emit('ActivityAppeared', self._ps_new_object(object_path))
|
||||
return False
|
||||
|
||||
def _activity_appeared_cb(self, object_path):
|
||||
gobject.idle_add(self._emit_activity_appeared_signal, object_path)
|
||||
|
||||
def _emit_activity_disappeared_signal(self, object_path):
|
||||
self.emit('ActivityDisappeared', self._ps_new_object(object_path))
|
||||
return False
|
||||
|
||||
def _activity_disappeared_cb(self, object_path):
|
||||
gobject.idle_add(self._emit_activity_disappeared_signal, object_path)
|
||||
|
||||
def getServices(self):
|
||||
resp = self._ps.getServices()
|
||||
servs = []
|
||||
for item in resp:
|
||||
servs.append(self._new_object(item))
|
||||
return servs
|
||||
|
||||
def getServicesOfType(self, stype):
|
||||
resp = self._ps.getServicesOfType(stype)
|
||||
servs = []
|
||||
for item in resp:
|
||||
servs.append(self._new_object(item))
|
||||
return servs
|
||||
|
||||
def getActivities(self):
|
||||
resp = self._ps.getActivities()
|
||||
acts = []
|
||||
for item in resp:
|
||||
acts.append(self._new_object(item))
|
||||
return acts
|
||||
|
||||
def getActivity(self, activity_id):
|
||||
try:
|
||||
act_op = self._ps.getActivity(activity_id)
|
||||
except dbus_bindings.DBusException:
|
||||
return None
|
||||
return self._new_object(act_op)
|
||||
|
||||
def get_activity_service(self, activity, stype):
|
||||
"""Find a particular service by activity and service type."""
|
||||
actid = activity.get_id()
|
||||
if self._activity_services.has_key(actid):
|
||||
services = self._activity_services[actid]
|
||||
for (buddy, service) in services:
|
||||
if service.get_type() == stype:
|
||||
return service
|
||||
return None
|
||||
def getBuddies(self):
|
||||
resp = self._ps.getBuddies()
|
||||
buddies = []
|
||||
for item in resp:
|
||||
buddies.append(self._new_object(item))
|
||||
return buddies
|
||||
|
||||
def start(self):
|
||||
"""Start the presence service by kicking off service discovery."""
|
||||
self._lock.acquire()
|
||||
if self._started:
|
||||
self._lock.release()
|
||||
return
|
||||
self._started = True
|
||||
self._lock.release()
|
||||
|
||||
# Always browse .local
|
||||
self._new_domain_cb(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, "local")
|
||||
|
||||
# Connect to Avahi and start looking for stuff
|
||||
domain_browser = self._server.DomainBrowserNew(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, "", avahi.DOMAIN_BROWSER_BROWSE, dbus.UInt32(0))
|
||||
db = dbus.Interface(self._bus.get_object(avahi.DBUS_NAME, domain_browser), avahi.DBUS_INTERFACE_DOMAIN_BROWSER)
|
||||
db.connect_to_signal('ItemNew', self._new_domain_cb_glue)
|
||||
|
||||
def get_owner(self):
|
||||
"""Return the owner of this machine/instance, if we've recognized them yet."""
|
||||
return self._owner
|
||||
|
||||
def _resolve_service_error_handler(self, err):
|
||||
logging.error("error resolving service: %s" % err)
|
||||
|
||||
def _find_service_adv(self, interface=None, protocol=None, name=None, stype=None, domain=None):
|
||||
"""Search a list of service advertisements for ones matching certain criteria."""
|
||||
adv_list = []
|
||||
for adv in self._service_advs:
|
||||
if interface and adv.interface() != interface:
|
||||
continue
|
||||
if protocol and adv.protocol() != protocol:
|
||||
continue
|
||||
if name and adv.name() != name:
|
||||
continue
|
||||
if stype and adv.stype() != stype:
|
||||
continue
|
||||
if domain and adv.domain() != domain:
|
||||
continue
|
||||
adv_list.append(adv)
|
||||
return adv_list
|
||||
|
||||
def _is_special_service_type(self, stype):
|
||||
"""Return True if the service type is a special, internal service
|
||||
type, and False if it's not."""
|
||||
if stype == Buddy.PRESENCE_SERVICE_TYPE:
|
||||
return True
|
||||
return False
|
||||
|
||||
def _handle_new_service_for_buddy(self, service):
|
||||
"""Deal with a new discovered service object."""
|
||||
# Once a service is resolved, we match it up to an existing buddy,
|
||||
# or create a new Buddy if this is the first service known about the buddy
|
||||
buddy_was_valid = False
|
||||
name = service.get_name()
|
||||
buddy = None
|
||||
def getBuddyByName(self, name):
|
||||
try:
|
||||
buddy = self._buddies[name]
|
||||
buddy_was_valid = buddy.is_valid()
|
||||
service_added = buddy.add_service(service)
|
||||
if service_added:
|
||||
self.emit('service-appeared', buddy, service)
|
||||
except KeyError:
|
||||
# Should this service mark the owner?
|
||||
owner_nick = env.get_nick_name()
|
||||
publisher_addr = service.get_publisher_address()
|
||||
if name == owner_nick and publisher_addr in self._local_addrs.values():
|
||||
buddy = Buddy.Owner(service)
|
||||
self._owner = buddy
|
||||
logging.debug("Owner is '%s'." % name)
|
||||
else:
|
||||
buddy = Buddy.Buddy(service)
|
||||
self._buddies[name] = buddy
|
||||
self.emit('service-appeared', buddy, service)
|
||||
if not buddy_was_valid and buddy.is_valid():
|
||||
self.emit("buddy-appeared", buddy)
|
||||
return buddy
|
||||
buddy_op = self._ps.getBuddyByName(name)
|
||||
except dbus_bindings.DBusException:
|
||||
return None
|
||||
return self._new_object(buddy_op)
|
||||
|
||||
def _handle_new_service_for_activity(self, service, buddy):
|
||||
# If the serivce is a group service, merge it into our groups list
|
||||
actid = service.get_activity_id()
|
||||
if not actid:
|
||||
actid = "*"
|
||||
if not self._activity_services.has_key(actid):
|
||||
self._activity_services[actid] = []
|
||||
self._activity_services[actid].append((buddy, service))
|
||||
self.emit('activity-announced', service, buddy)
|
||||
|
||||
def _handle_remove_service_for_activity(self, service, buddy):
|
||||
actid = service.get_activity_id()
|
||||
if not actid:
|
||||
actid = "*"
|
||||
if self._activity_services.has_key(actid):
|
||||
try:
|
||||
self._activity_services.remove((buddy, service))
|
||||
except:
|
||||
pass
|
||||
|
||||
def _resolve_service_reply_cb(self, interface, protocol, full_name, stype, domain, host, aprotocol, address, port, txt, flags):
|
||||
"""When the service discovery finally gets here, we've got enough information about the
|
||||
service to assign it to a buddy."""
|
||||
logging.debug("resolved service '%s' type '%s' domain '%s' to %s:%s" % (full_name, stype, domain, address, port))
|
||||
|
||||
full_name = full_name.encode()
|
||||
stype = stype.encode()
|
||||
domain = domain.encode()
|
||||
host = host.encode()
|
||||
address = address.encode()
|
||||
|
||||
# If this service was previously unresolved, remove it from the
|
||||
# unresolved list
|
||||
adv_list = self._find_service_adv(interface=interface, protocol=protocol,
|
||||
name=full_name, stype=stype, domain=domain)
|
||||
if not adv_list:
|
||||
return False
|
||||
adv = adv_list[0]
|
||||
adv.set_resolved(True)
|
||||
if adv in self._resolve_queue:
|
||||
self._resolve_queue.remove(adv)
|
||||
|
||||
# Update the service now that it's been resolved
|
||||
service = Service.Service(name=full_name, stype=stype, domain=domain,
|
||||
address=address, port=port, properties=txt)
|
||||
adv.set_service(service)
|
||||
|
||||
# Merge the service into our buddy and group lists, if needed
|
||||
buddy = self._handle_new_service_for_buddy(service)
|
||||
if buddy and service.get_activity_id():
|
||||
self._handle_new_service_for_activity(service, buddy)
|
||||
|
||||
return False
|
||||
|
||||
def _resolve_service_reply_cb_glue(self, interface, protocol, name, stype, domain, host, aprotocol, address, port, txt, flags):
|
||||
gobject.idle_add(self._resolve_service_reply_cb, interface, protocol,
|
||||
name, stype, domain, host, aprotocol, address, port, txt, flags)
|
||||
|
||||
def _resolve_service(self, adv):
|
||||
"""Resolve and lookup a ZeroConf service to obtain its address and TXT records."""
|
||||
# Ask avahi to resolve this particular service
|
||||
logging.debug('resolving service %s %s' % (adv.name(), adv.stype()))
|
||||
self._server.ResolveService(int(adv.interface()), int(adv.protocol()), adv.name(),
|
||||
adv.stype(), adv.domain(), avahi.PROTO_UNSPEC, dbus.UInt32(0),
|
||||
reply_handler=self._resolve_service_reply_cb_glue,
|
||||
error_handler=self._resolve_service_error_handler)
|
||||
return False
|
||||
|
||||
def _service_appeared_cb(self, interface, protocol, full_name, stype, domain, flags):
|
||||
logging.debug("found service '%s' (%d) of type '%s' in domain '%s' on %i.%i." % (full_name, flags, stype, domain, interface, protocol))
|
||||
|
||||
# Add the service to our unresolved services list
|
||||
adv_list = self._find_service_adv(interface=interface, protocol=protocol,
|
||||
name=full_name.encode(), stype=stype.encode(), domain=domain.encode())
|
||||
adv = None
|
||||
if not adv_list:
|
||||
adv = ServiceAdv(interface=interface, protocol=protocol, name=full_name.encode(),
|
||||
stype=stype.encode(), domain=domain.encode())
|
||||
self._service_advs.append(adv)
|
||||
else:
|
||||
adv = adv_list[0]
|
||||
|
||||
# Find out the IP address of this interface, if we haven't already
|
||||
if interface not in self._local_addrs.keys():
|
||||
ifname = self._server.GetNetworkInterfaceNameByIndex(interface)
|
||||
if ifname:
|
||||
addr = _get_local_ip_address(ifname)
|
||||
if addr:
|
||||
self._local_addrs[interface] = addr
|
||||
|
||||
# Decompose service type if we can
|
||||
(actid, buddy_name) = Service._decompose_service_name(full_name.encode())
|
||||
|
||||
# FIXME: find a better way of letting the StartPage get everything
|
||||
self.emit('new-service-adv', actid, stype)
|
||||
|
||||
# If we care about the service right now, resolve it
|
||||
resolve = False
|
||||
if actid is not None or stype in self._allowed_service_types:
|
||||
resolve = True
|
||||
if self._is_special_service_type(stype):
|
||||
resolve = True
|
||||
if resolve and not adv in self._resolve_queue:
|
||||
self._resolve_queue.append(adv)
|
||||
gobject.idle_add(self._resolve_service, adv)
|
||||
else:
|
||||
logging.debug("Do not resolve service '%s' of type '%s', we don't care about it." % (full_name, stype))
|
||||
|
||||
return False
|
||||
|
||||
def _service_appeared_cb_glue(self, interface, protocol, name, stype, domain, flags):
|
||||
gobject.idle_add(self._service_appeared_cb, interface, protocol, name, stype, domain, flags)
|
||||
|
||||
def _service_disappeared_cb(self, interface, protocol, full_name, stype, domain, flags):
|
||||
logging.debug("service '%s' of type '%s' in domain '%s' on %i.%i disappeared." % (full_name, stype, domain, interface, protocol))
|
||||
full_name = full_name.encode()
|
||||
stype = stype.encode()
|
||||
domain = domain.encode()
|
||||
|
||||
# If it's an unresolved service, remove it from our unresolved list
|
||||
adv_list = self._find_service_adv(interface=interface, protocol=protocol,
|
||||
name=full_name, stype=stype, domain=domain)
|
||||
if not adv_list:
|
||||
return False
|
||||
|
||||
# Get the service object; if none, we have nothing left to do
|
||||
adv = adv_list[0]
|
||||
if adv in self._resolve_queue:
|
||||
self._resolve_queue.remove(adv)
|
||||
service = adv.service()
|
||||
if not service:
|
||||
return False
|
||||
|
||||
# Decompose service type if we can
|
||||
(actid, buddy_name) = Service._decompose_service_name(full_name)
|
||||
|
||||
# Remove the service from the buddy
|
||||
def getBuddyByAddress(self, addr):
|
||||
try:
|
||||
buddy = self._buddies[buddy_name]
|
||||
except KeyError:
|
||||
pass
|
||||
else:
|
||||
buddy.remove_service(service)
|
||||
self.emit('service-disappeared', buddy, service)
|
||||
if not buddy.is_valid():
|
||||
self.emit("buddy-disappeared", buddy)
|
||||
del self._buddies[buddy_name]
|
||||
self._handle_remove_service_for_activity(service, buddy)
|
||||
buddy_op = self._ps.getBuddyByAddress(addr)
|
||||
except dbus_bindings.DBusException:
|
||||
return None
|
||||
return self._new_object(buddy_op)
|
||||
|
||||
return False
|
||||
|
||||
def _service_disappeared_cb_glue(self, interface, protocol, name, stype, domain, flags):
|
||||
gobject.idle_add(self._service_disappeared_cb, interface, protocol, name, stype, domain, flags)
|
||||
|
||||
def _new_service_type_cb(self, interface, protocol, stype, domain, flags):
|
||||
# Are we already browsing this domain for this type?
|
||||
if self._service_browsers.has_key((interface, protocol, stype, domain)):
|
||||
return
|
||||
|
||||
# Start browsing for all services of this type in this domain
|
||||
s_browser = self._server.ServiceBrowserNew(interface, protocol, stype, domain, dbus.UInt32(0))
|
||||
browser_obj = dbus.Interface(self._bus.get_object(avahi.DBUS_NAME, s_browser), avahi.DBUS_INTERFACE_SERVICE_BROWSER)
|
||||
logging.debug("now browsing for services of type '%s' in domain '%s' on %i.%i ..." % (stype, domain, interface, protocol))
|
||||
browser_obj.connect_to_signal('ItemNew', self._service_appeared_cb_glue)
|
||||
browser_obj.connect_to_signal('ItemRemove', self._service_disappeared_cb_glue)
|
||||
|
||||
self._service_browsers[(interface, protocol, stype, domain)] = browser_obj
|
||||
return False
|
||||
|
||||
def _new_service_type_cb_glue(self, interface, protocol, stype, domain, flags):
|
||||
gobject.idle_add(self._new_service_type_cb, interface, protocol, stype, domain, flags)
|
||||
|
||||
def _new_domain_cb(self, interface, protocol, domain, flags=0):
|
||||
"""Callback from Avahi when a new domain has been found. Start
|
||||
browsing the new domain."""
|
||||
# Only use .local for now...
|
||||
if domain != "local":
|
||||
return
|
||||
|
||||
# Are we already browsing this domain?
|
||||
if self._service_type_browsers.has_key((interface, protocol, domain)):
|
||||
return
|
||||
|
||||
# Start browsing this domain for the services its members offer
|
||||
def getOwner(self):
|
||||
try:
|
||||
st_browser = self._server.ServiceTypeBrowserNew(interface, protocol, domain, dbus.UInt32(0))
|
||||
browser_obj = dbus.Interface(self._bus.get_object(avahi.DBUS_NAME, st_browser), avahi.DBUS_INTERFACE_SERVICE_TYPE_BROWSER)
|
||||
except dbus.DBusException, exc:
|
||||
logging.error("got exception %s while attempting to browse domain %s on %i.%i" % (domain, interface, protocol))
|
||||
str_exc = str(exc)
|
||||
if str_exc.find("The name org.freedesktop.Avahi was not provided by any .service files") >= 0:
|
||||
raise Exception("Avahi does not appear to be running. '%s'" % str_exc)
|
||||
else:
|
||||
raise exc
|
||||
logging.debug("now browsing domain '%s' on %i.%i ..." % (domain, interface, protocol))
|
||||
browser_obj.connect_to_signal('ItemNew', self._new_service_type_cb_glue)
|
||||
self._service_type_browsers[(interface, protocol, domain)] = browser_obj
|
||||
return False
|
||||
owner_op = self._ps.getOwner()
|
||||
except dbus_bindings.DBusException:
|
||||
return None
|
||||
return self._new_object(buddy_op)
|
||||
|
||||
def _new_domain_cb_glue(self, interface, protocol, domain, flags=0):
|
||||
gobject.idle_add(self._new_domain_cb, interface, protocol, domain, flags)
|
||||
|
||||
def track_service_type(self, stype):
|
||||
"""Requests that the Presence service look for and recognize
|
||||
a certain mDNS service types."""
|
||||
if not self._started:
|
||||
raise RuntimeError("presence service must be started first.")
|
||||
if type(stype) == type(u""):
|
||||
raise ValueError("service type should not be unicode.")
|
||||
if type(stype) != type(""):
|
||||
raise ValueError("service type must be a string.")
|
||||
if self._is_special_service_type(stype):
|
||||
return
|
||||
if stype in self._allowed_service_types:
|
||||
return
|
||||
|
||||
# Decompose service type if we can
|
||||
self._allowed_service_types.append(stype)
|
||||
self._check_and_resolve_service_advs(stype)
|
||||
|
||||
def _check_and_resolve_service_advs(self, stype):
|
||||
# Find unresolved services that match the service type
|
||||
# we're now interested in, and resolve them
|
||||
resolv_list = []
|
||||
|
||||
# Find services of this type
|
||||
resolv_list = self._find_service_adv(stype=stype)
|
||||
# Request resolution for them if they aren't in-process already
|
||||
for adv in resolv_list:
|
||||
if adv not in self._resolve_queue:
|
||||
self._resolve_queue.append(adv)
|
||||
gobject.idle_add(self._resolve_service, adv)
|
||||
|
||||
def untrack_service_type(self, stype):
|
||||
"""Stop tracking a certain mDNS service."""
|
||||
if not self._started:
|
||||
raise RuntimeError("presence service must be started first.")
|
||||
if type(stype) == type(u""):
|
||||
raise ValueError("service type should not be unicode.")
|
||||
if not type(stype) == type(""):
|
||||
raise ValueError("service type must be a string.")
|
||||
|
||||
if stype in self._allowed_service_types:
|
||||
self._allowed_service_types.remove(stype)
|
||||
|
||||
def join_shared_activity(self, service):
|
||||
"""Convenience function to join a group and notify other buddies
|
||||
that you are a member of it."""
|
||||
if not isinstance(service, Service.Service):
|
||||
raise ValueError("service was not a valid service object.")
|
||||
self.register_service(service)
|
||||
|
||||
def share_activity(self, activity, stype, properties=None, address=None, port=None):
|
||||
"""Convenience function to share an activity with other buddies."""
|
||||
if not self._started:
|
||||
raise RuntimeError("presence service must be started first.")
|
||||
actid = activity.get_id()
|
||||
owner_nick = self._owner.get_nick_name()
|
||||
real_name = Service.compose_service_name(owner_nick, actid)
|
||||
if address and type(address) != type(""):
|
||||
raise ValueError("address must be a valid string.")
|
||||
if address == None:
|
||||
# Use random currently unassigned multicast address
|
||||
address = "232.%d.%d.%d" % (random.randint(0, 254), random.randint(1, 254),
|
||||
random.randint(1, 254))
|
||||
if port and (type(port) != type(1) or port <= 1024 or port >= 65535):
|
||||
raise ValueError("port must be a number between 1024 and 65535")
|
||||
if not port:
|
||||
# random port #
|
||||
port = random.randint(5000, 65535)
|
||||
|
||||
# Mark the activity as shared
|
||||
if stype == activity.get_default_type():
|
||||
activity.set_shared()
|
||||
|
||||
logging.debug('Share activity %s, type %s, address %s, port %d, properties %s' % (actid, stype, address, port, properties))
|
||||
service = Service.Service(name=real_name, stype=stype, domain="local",
|
||||
address=address, port=port, properties=properties)
|
||||
# Publish it to the world
|
||||
self.register_service(service)
|
||||
return service
|
||||
|
||||
def register_service(self, service):
|
||||
"""Register a new service, advertising it to other Buddies on the network."""
|
||||
if not self._started:
|
||||
raise RuntimeError("presence service must be started first.")
|
||||
|
||||
rs_name = service.get_name()
|
||||
if self.get_owner() and rs_name != self.get_owner().get_nick_name():
|
||||
raise RuntimeError("Tried to register a service that didn't have Owner nick as the service name!")
|
||||
actid = service.get_activity_id()
|
||||
if actid:
|
||||
rs_name = Service.compose_service_name(rs_name, actid)
|
||||
rs_stype = service.get_type()
|
||||
rs_port = service.get_port()
|
||||
rs_props = service.get_properties()
|
||||
rs_domain = service.get_domain()
|
||||
rs_address = service.get_address()
|
||||
if not rs_domain or not len(rs_domain):
|
||||
rs_domain = ""
|
||||
logging.debug("registered service name '%s' type '%s' on port %d with args %s" % (rs_name, rs_stype, rs_port, rs_props))
|
||||
|
||||
try:
|
||||
group = dbus.Interface(self._bus.get_object(avahi.DBUS_NAME, self._server.EntryGroupNew()), avahi.DBUS_INTERFACE_ENTRY_GROUP)
|
||||
|
||||
# Add properties; ensure they are converted to ByteArray types
|
||||
# because python sometimes can't figure that out
|
||||
info = []
|
||||
for k, v in rs_props.items():
|
||||
tmp_item = "%s=%s" % (k, v)
|
||||
# Convert to local encoding for consistency (for now)
|
||||
if type(tmp_item) == type(u""):
|
||||
tmp_item = tmp_item.encode()
|
||||
info.append(dbus.types.ByteArray(tmp_item))
|
||||
|
||||
if rs_address and len(rs_address):
|
||||
info.append("address=%s" % (rs_address))
|
||||
logging.debug("PS: about to call AddService for Avahi with rs_name='%s' (%s), rs_stype='%s' (%s)," \
|
||||
" rs_domain='%s' (%s), rs_port=%d (%s), info='%s' (%s)" % (rs_name, type(rs_name), rs_stype,
|
||||
type(rs_stype), rs_domain, type(rs_domain), rs_port, type(rs_port), info, type(info)))
|
||||
group.AddService(avahi.IF_UNSPEC, avahi.PROTO_UNSPEC, 0, rs_name, rs_stype,
|
||||
rs_domain, "", # let Avahi figure the 'host' out
|
||||
dbus.UInt16(rs_port), info,)
|
||||
group.Commit()
|
||||
except dbus.dbus_bindings.DBusException, exc:
|
||||
# FIXME: ignore local name collisions, since that means
|
||||
# the zeroconf service is already registered. Ideally we
|
||||
# should un-register it an re-register with the correct info
|
||||
if str(exc) == "Local name collision":
|
||||
pass
|
||||
activity_stype = service.get_type()
|
||||
self.track_service_type(activity_stype)
|
||||
return group
|
||||
|
||||
def get_buddy_by_nick_name(self, nick_name):
|
||||
"""Look up and return a buddy by nickname."""
|
||||
if self._buddies.has_key(nick_name):
|
||||
return self._buddies[nick_name]
|
||||
return None
|
||||
|
||||
def get_buddy_by_address(self, address):
|
||||
for buddy in self._buddies.values():
|
||||
if buddy.get_address() == address:
|
||||
return buddy
|
||||
return None
|
||||
|
||||
def get_buddies(self):
|
||||
"""Return the entire buddy list."""
|
||||
return self._buddies.values()
|
||||
|
||||
#################################################################
|
||||
# Tests
|
||||
#################################################################
|
||||
|
||||
import unittest
|
||||
|
||||
ps = None
|
||||
|
||||
class PresenceServiceTestCase(unittest.TestCase):
|
||||
_DEF_NAME = "Paul"
|
||||
_DEF_STYPE = Buddy.PRESENCE_SERVICE_TYPE
|
||||
_DEF_DOMAIN = "local"
|
||||
_DEF_PORT = 3333
|
||||
_DEF_PROPERTIES = {"foo": "bar", "bork": "baz"}
|
||||
|
||||
def testNoServices(self):
|
||||
"""Ensure that no services are found initially."""
|
||||
"""This test may illegitimately fail if there's another person
|
||||
on the network running sugar... So its usefulness is somewhat
|
||||
dubious."""
|
||||
import gtk
|
||||
global ps
|
||||
buddies = ps.get_buddies()
|
||||
assert len(buddies) == 0, "A buddy was found without setting tracked services!"
|
||||
gtk.main_quit()
|
||||
|
||||
def testServiceRegistration(self):
|
||||
service = Service.Service(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN,
|
||||
address=None, port=self._DEF_PORT, properties=self._DEF_PROPERTIES)
|
||||
global ps
|
||||
ps.register_service(service)
|
||||
# Give the Presence Service some time to find the new service
|
||||
gobject.timeout_add(2000, self.quitMain)
|
||||
import gtk
|
||||
gtk.main()
|
||||
|
||||
def quitMain(self):
|
||||
import gtk
|
||||
gtk.main_quit()
|
||||
|
||||
def testServiceDetection(self):
|
||||
global ps
|
||||
buddy = ps.get_buddy_by_nick_name("Paul")
|
||||
assert buddy, "The registered buddy was not found after 2 seconds!"
|
||||
assert buddy.is_valid(), "The buddy was invalid, since no presence was advertised."
|
||||
assert buddy.is_owner() == True, "The buddy was not the owner, but it should be!"
|
||||
|
||||
def addToSuite(suite):
|
||||
suite.addTest(PresenceServiceTestCase("testNoServices"))
|
||||
suite.addTest(PresenceServiceTestCase("testServiceRegistration"))
|
||||
suite.addTest(PresenceServiceTestCase("testServiceDetection"))
|
||||
addToSuite = staticmethod(addToSuite)
|
||||
|
||||
def runTests():
|
||||
suite = unittest.TestSuite()
|
||||
PresenceServiceTestCase.addToSuite(suite)
|
||||
runner = unittest.TextTestRunner()
|
||||
runner.run(suite)
|
||||
|
||||
def main():
|
||||
import gtk
|
||||
global ps
|
||||
ps = PresenceService.get_instance()
|
||||
ps.start()
|
||||
gobject.timeout_add(4000, runTests)
|
||||
gtk.main()
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
|
||||
@ -1,394 +1,25 @@
|
||||
import avahi
|
||||
from sugar import util
|
||||
import dbus
|
||||
|
||||
def _txt_to_dict(txt):
|
||||
"""Convert an avahi-returned TXT record formatted
|
||||
as nested arrays of integers (from dbus) into a dict
|
||||
of key/value string pairs."""
|
||||
prop_dict = {}
|
||||
props = avahi.txt_array_to_string_array(txt)
|
||||
for item in props:
|
||||
key = value = None
|
||||
if '=' not in item:
|
||||
# No = means a boolean value of true
|
||||
key = item
|
||||
value = True
|
||||
else:
|
||||
(key, value) = item.split('=')
|
||||
prop_dict[key] = value
|
||||
return prop_dict
|
||||
|
||||
def compose_service_name(name, activity_id):
|
||||
if not activity_id:
|
||||
return name
|
||||
if type(name) == type(u""):
|
||||
raise ValueError("name must not be in unicode.")
|
||||
if not name or type(name) != type(""):
|
||||
raise ValueError("name must be a valid string.")
|
||||
composed = "%s [%s]" % (name, activity_id)
|
||||
return composed.encode()
|
||||
|
||||
def _decompose_service_name(name):
|
||||
"""Break a service name into the name and activity ID, if we can."""
|
||||
if type(name) != type(""):
|
||||
raise ValueError("name must be a valid string.")
|
||||
name_len = len(name)
|
||||
if name_len < util.ACTIVITY_ID_LEN + 5:
|
||||
return (None, name)
|
||||
# check for activity id end marker
|
||||
if name[name_len - 1] != "]":
|
||||
return (None, name)
|
||||
start = name_len - 1 - util.ACTIVITY_ID_LEN
|
||||
end = name_len - 1
|
||||
# check for activity id start marker
|
||||
if name[start - 1] != "[" or name[start - 2] != " ":
|
||||
return (None, name)
|
||||
activity_id = name[start:end]
|
||||
if not util.validate_activity_id(activity_id):
|
||||
return (None, name)
|
||||
return (activity_id, name[:start - 2])
|
||||
|
||||
def is_multicast_address(address):
|
||||
"""Simple numerical check for whether an IP4 address
|
||||
is in the range for multicast addresses or not."""
|
||||
if not address:
|
||||
return False
|
||||
if address[3] != '.':
|
||||
return False
|
||||
first = int(address[:3])
|
||||
if first >= 224 and first <= 239:
|
||||
return True
|
||||
return False
|
||||
|
||||
def deserialize(sdict):
|
||||
try:
|
||||
name = sdict['name']
|
||||
if type(name) == type(u""):
|
||||
name = name.encode()
|
||||
stype = sdict['stype']
|
||||
if type(stype) == type(u""):
|
||||
stype = stype.encode()
|
||||
domain = sdict['domain']
|
||||
if type(domain) == type(u""):
|
||||
domain = domain.encode()
|
||||
port = sdict['port']
|
||||
properties = sdict['properties']
|
||||
except KeyError, exc:
|
||||
raise ValueError("Serialized service object was not valid.")
|
||||
|
||||
address = None
|
||||
try:
|
||||
address = sdict['address']
|
||||
if type(address) == type(u""):
|
||||
address = address.encode()
|
||||
except KeyError:
|
||||
pass
|
||||
|
||||
activity_id = None
|
||||
try:
|
||||
activity_id = sdict['activity_id']
|
||||
if type(activity_id) == type(u""):
|
||||
activity_id = activity_id.encode()
|
||||
except KeyError:
|
||||
pass
|
||||
|
||||
if activity_id is not None:
|
||||
name = compose_service_name(name, activity_id)
|
||||
|
||||
return Service(name, stype, domain, address=address,
|
||||
port=port, properties=properties)
|
||||
import gobject
|
||||
import dbus, dbus_bindings
|
||||
|
||||
|
||||
_ACTIVITY_ID_TAG = "ActivityID"
|
||||
class Service(gobject.GObject):
|
||||
|
||||
class Service(object):
|
||||
"""Encapsulates information about a specific ZeroConf/mDNS
|
||||
service as advertised on the network."""
|
||||
def __init__(self, name, stype, domain, address=None, port=-1, properties=None):
|
||||
# Validate immutable options
|
||||
if name and type(name) == type(u""):
|
||||
raise ValueError("name must not be in unicode.")
|
||||
if not name or type(name) != type("") or not len(name):
|
||||
raise ValueError("must specify a valid service name.")
|
||||
_PRESENCE_SERVICE = "org.laptop.Presence"
|
||||
_SERVICE_DBUS_INTERFACE = "org.laptop.Presence.Service"
|
||||
|
||||
if stype and type(stype) == type(u""):
|
||||
raise ValueError("service type must not be in unicode.")
|
||||
if not stype or type(stype) != type("") or not len(stype):
|
||||
raise ValueError("must specify a service type.")
|
||||
if not stype.endswith("._tcp") and not stype.endswith("._udp"):
|
||||
raise ValueError("must specify a TCP or UDP service type.")
|
||||
def __init__(self, bus, new_obj_cb, del_obj_cb, object_path):
|
||||
gobject.GObject.__init__(self)
|
||||
self._object_path = object_path
|
||||
self._ps_new_object = new_obj_cb
|
||||
self._ps_del_object = del_obj_cb
|
||||
sobj = bus.get_object(self._PRESENCE_SERVICE, object_path)
|
||||
self._service = dbus.Interface(sobj, self._SERVICE_DBUS_INTERFACE)
|
||||
|
||||
if domain and type(domain) == type(u""):
|
||||
raise ValueError("domain must not be in unicode.")
|
||||
if type(domain) != type(""):
|
||||
raise ValueError("must specify a domain.")
|
||||
if len(domain) and domain != "local":
|
||||
raise ValueError("must use the 'local' domain (for now).")
|
||||
def object_path(self):
|
||||
return self._object_path
|
||||
|
||||
(actid, real_name) = _decompose_service_name(name)
|
||||
self._name = real_name
|
||||
self._stype = stype
|
||||
self._domain = domain
|
||||
self._port = -1
|
||||
self.set_port(port)
|
||||
self._properties = {}
|
||||
self.set_properties(properties)
|
||||
# Publisher address is the unicast source IP
|
||||
self._publisher_address = address
|
||||
# Address is the published address, could be multicast or unicast
|
||||
self._address = None
|
||||
if self._properties.has_key('address'):
|
||||
self.set_address(self._properties['address'])
|
||||
else:
|
||||
self.set_address(address)
|
||||
def getProperties(self):
|
||||
return self._service.getProperties()
|
||||
|
||||
# Ensure that an ActivityID tag, if given, matches
|
||||
# what we expect from the service type
|
||||
if self._properties.has_key(_ACTIVITY_ID_TAG):
|
||||
prop_actid = self._properties[_ACTIVITY_ID_TAG]
|
||||
if (prop_actid and not actid) or (prop_actid != actid):
|
||||
raise ValueError("ActivityID property specified, but the service names's activity ID didn't match it: %s, %s" % (prop_actid, actid))
|
||||
self._activity_id = actid
|
||||
if actid and not self._properties.has_key(_ACTIVITY_ID_TAG):
|
||||
self._properties[_ACTIVITY_ID_TAG] = actid
|
||||
|
||||
def serialize(self, owner=None):
|
||||
sdict = {}
|
||||
if owner is not None:
|
||||
sdict['name'] = dbus.Variant(owner.get_nick_name())
|
||||
else:
|
||||
sdict['name'] = dbus.Variant(self._name)
|
||||
sdict['stype'] = dbus.Variant(self._stype)
|
||||
if self._activity_id:
|
||||
sdict['activity_id'] = dbus.Variant(self._activity_id)
|
||||
sdict['domain'] = dbus.Variant(self._domain)
|
||||
if self._address:
|
||||
sdict['address'] = dbus.Variant(self._address)
|
||||
sdict['port'] = dbus.Variant(self._port)
|
||||
sdict['properties'] = dbus.Variant(self._properties)
|
||||
return sdict
|
||||
|
||||
def get_name(self):
|
||||
"""Return the service's name, usually that of the
|
||||
buddy who provides it."""
|
||||
return self._name
|
||||
|
||||
def is_multicast_service(self):
|
||||
"""Return True if the service's address is a multicast address,
|
||||
False if it is not."""
|
||||
return is_multicast_address(self._address)
|
||||
|
||||
def get_one_property(self, key):
|
||||
"""Return one property of the service, or None
|
||||
if the property was not found. Cannot distinguish
|
||||
between lack of a property, and a property value that
|
||||
actually is None."""
|
||||
if key in self._properties.keys():
|
||||
return self._properties[key]
|
||||
return None
|
||||
|
||||
def get_properties(self):
|
||||
"""Return a python dictionary of all the service's
|
||||
properties."""
|
||||
return self._properties
|
||||
|
||||
def set_properties(self, properties):
|
||||
"""Set the service's properties from either an Avahi
|
||||
TXT record (a list of lists of integers), or a
|
||||
python dictionary."""
|
||||
self._properties = {}
|
||||
props = {}
|
||||
if type(properties) == type([]):
|
||||
props = _txt_to_dict(properties)
|
||||
elif type(properties) == type({}):
|
||||
props = properties
|
||||
|
||||
# Set key/value pairs on internal property list,
|
||||
# also convert everything to local encoding (for now)
|
||||
# to ensure consistency
|
||||
for key, value in props.items():
|
||||
tmp_key = key
|
||||
tmp_val = value
|
||||
if type(tmp_key) == type(u""):
|
||||
tmp_key = tmp_key.encode()
|
||||
if type(tmp_val) == type(u""):
|
||||
tmp_val = tmp_val.encode()
|
||||
self._properties[tmp_key] = tmp_val
|
||||
|
||||
def get_type(self):
|
||||
"""Return the service's service type."""
|
||||
return self._stype
|
||||
|
||||
def get_activity_id(self):
|
||||
"""Return the activity ID this service is associated with, if any."""
|
||||
return self._activity_id
|
||||
|
||||
def get_port(self):
|
||||
return self._port
|
||||
|
||||
def set_port(self, port):
|
||||
if type(port) != type(1) or (port <= 1024 and port > 65536):
|
||||
raise ValueError("must specify a valid port number between 1024 and 65536.")
|
||||
self._port = port
|
||||
|
||||
def get_publisher_address(self):
|
||||
return self._publisher_address
|
||||
|
||||
def get_address(self):
|
||||
return self._address
|
||||
|
||||
def set_address(self, address):
|
||||
if address is not None:
|
||||
if type(address) != type("") and type(address) != type(u""):
|
||||
raise ValueError("must specify a valid address.")
|
||||
if address and type(address) == type(u""):
|
||||
address = address.encode()
|
||||
self._address = address
|
||||
|
||||
def get_domain(self):
|
||||
"""Return the ZeroConf/mDNS domain the service was found in."""
|
||||
return self._domain
|
||||
|
||||
|
||||
#################################################################
|
||||
# Tests
|
||||
#################################################################
|
||||
|
||||
import unittest
|
||||
|
||||
class ServiceTestCase(unittest.TestCase):
|
||||
_DEF_NAME = "foobar"
|
||||
_DEF_STYPE = "_foo._bar._tcp"
|
||||
_DEF_DOMAIN = "local"
|
||||
_DEF_ADDRESS = "1.1.1.1"
|
||||
_DEF_PORT = 1234
|
||||
_DEF_PROPS = {'foobar': 'baz'}
|
||||
|
||||
_STR_TEST_ARGS = [None, 0, [], {}]
|
||||
|
||||
def _test_init_fail(self, name, stype, domain, address, port, properties, fail_msg):
|
||||
"""Test something we expect to fail."""
|
||||
try:
|
||||
service = Service(name, stype, domain, address, port, properties)
|
||||
except ValueError, exc:
|
||||
pass
|
||||
else:
|
||||
self.fail("expected a ValueError for %s." % fail_msg)
|
||||
|
||||
def testName(self):
|
||||
for item in self._STR_TEST_ARGS:
|
||||
self._test_init_fail(item, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid name")
|
||||
|
||||
def testType(self):
|
||||
for item in self._STR_TEST_ARGS:
|
||||
self._test_init_fail(self._DEF_NAME, item, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid service type")
|
||||
self._test_init_fail(self._DEF_NAME, "_bork._foobar", self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid service type")
|
||||
|
||||
def testDomain(self):
|
||||
for item in self._STR_TEST_ARGS:
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, item, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid domain")
|
||||
# Only accept local for now
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, "foobar", self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid domain")
|
||||
# Make sure "" works
|
||||
service = Service(self._DEF_NAME, self._DEF_STYPE, "", self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS)
|
||||
assert service, "Empty domain was not accepted!"
|
||||
|
||||
def testAddress(self):
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, [],
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, {},
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, 1234,
|
||||
self._DEF_PORT, self._DEF_PROPS, "invalid address")
|
||||
|
||||
def testPort(self):
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
[], self._DEF_PROPS, "invalid port")
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
{}, self._DEF_PROPS, "invalid port")
|
||||
self._test_init_fail(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
"adf", self._DEF_PROPS, "invalid port")
|
||||
|
||||
def testGoodInit(self):
|
||||
service = Service(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS)
|
||||
assert service.get_name() == self._DEF_NAME, "service name wasn't correct after init."
|
||||
assert service.get_type() == self._DEF_STYPE, "service type wasn't correct after init."
|
||||
assert service.get_domain() == "local", "service domain wasn't correct after init."
|
||||
assert service.get_address() == self._DEF_ADDRESS, "service address wasn't correct after init."
|
||||
assert service.get_port() == self._DEF_PORT, "service port wasn't correct after init."
|
||||
value = service.get_one_property('foobar')
|
||||
assert value and value == 'baz', "service property wasn't correct after init."
|
||||
|
||||
def testAvahiProperties(self):
|
||||
props = [[111, 114, 103, 46, 102, 114, 101, 101, 100, 101, 115, 107, 116, 111, 112, 46, 65, 118, 97, 104, 105, 46, 99, 111, 111, 107, 105, 101, 61, 50, 54, 48, 49, 53, 52, 51, 57, 53, 50]]
|
||||
key = "org.freedesktop.Avahi.cookie"
|
||||
expected_value = "2601543952"
|
||||
service = Service(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, props)
|
||||
value = service.get_one_property(key)
|
||||
assert value and value == expected_value, "service properties weren't correct after init."
|
||||
value = service.get_one_property('bork')
|
||||
assert not value, "service properties weren't correct after init."
|
||||
|
||||
def testBoolProperty(self):
|
||||
props = [[111, 114, 103, 46, 102, 114, 101, 101, 100, 101, 115, 107, 116, 111, 112, 46, 65, 118, 97, 104, 105, 46, 99, 111, 111, 107, 105, 101]]
|
||||
key = "org.freedesktop.Avahi.cookie"
|
||||
expected_value = True
|
||||
service = Service(self._DEF_NAME, self._DEF_STYPE, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, props)
|
||||
value = service.get_one_property(key)
|
||||
assert value is not None and value == expected_value, "service properties weren't correct after init."
|
||||
|
||||
def testGroupService(self):
|
||||
# Valid group service type, non-multicast address
|
||||
group_stype = "_af5e5a7c998e89b9a_group_olpc._udp"
|
||||
self._test_init_fail(self._DEF_NAME, group_stype, self._DEF_DOMAIN, self._DEF_ADDRESS,
|
||||
self._DEF_PORT, self._DEF_PROPS, "group service type, but non-multicast address")
|
||||
|
||||
# Valid group service type, None address
|
||||
service = Service(self._DEF_NAME, group_stype, self._DEF_DOMAIN, None,
|
||||
self._DEF_PORT, self._DEF_PROPS)
|
||||
assert service.get_address() == None, "address was not None as expected!"
|
||||
# Set address to invalid multicast address
|
||||
try:
|
||||
service.set_address(self._DEF_ADDRESS)
|
||||
except ValueError, exc:
|
||||
pass
|
||||
else:
|
||||
self.fail("expected a ValueError for invalid address.")
|
||||
|
||||
# Valid group service type and multicast address, ensure it works
|
||||
mc_addr = "224.0.0.34"
|
||||
service = Service(self._DEF_NAME, group_stype, self._DEF_DOMAIN, mc_addr,
|
||||
self._DEF_PORT, self._DEF_PROPS)
|
||||
assert service.get_address() == mc_addr, "address was not expected address!"
|
||||
|
||||
def addToSuite(suite):
|
||||
suite.addTest(ServiceTestCase("testName"))
|
||||
suite.addTest(ServiceTestCase("testType"))
|
||||
suite.addTest(ServiceTestCase("testDomain"))
|
||||
suite.addTest(ServiceTestCase("testAddress"))
|
||||
suite.addTest(ServiceTestCase("testPort"))
|
||||
suite.addTest(ServiceTestCase("testGoodInit"))
|
||||
suite.addTest(ServiceTestCase("testAvahiProperties"))
|
||||
suite.addTest(ServiceTestCase("testBoolProperty"))
|
||||
suite.addTest(ServiceTestCase("testGroupService"))
|
||||
addToSuite = staticmethod(addToSuite)
|
||||
|
||||
|
||||
def main():
|
||||
suite = unittest.TestSuite()
|
||||
ServiceTestCase.addToSuite(suite)
|
||||
runner = unittest.TextTestRunner()
|
||||
runner.run(suite)
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
def getPublishedValue(self, key):
|
||||
value = self._service.getPublishedValue(key)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user