+++ /dev/null
-
-# We keep a copy of the old introducer (both client and server) here to
-# support compatibility tests. The old client is supposed to handle the new
-# server, and new client is supposed to handle the old server.
-
-import re, time, sha
-from base64 import b32decode
-from zope.interface import implements
-from twisted.application import service
-from foolscap.api import Referenceable
-from allmydata.util import log, idlib
-from allmydata.introducer.interfaces import RIIntroducerSubscriberClient, \
- IIntroducerClient, RIIntroducerPublisherAndSubscriberService
-
-def make_index(announcement):
- (furl, service_name, ri_name, nickname, ver, oldest) = announcement
- m = re.match(r'pb://(\w+)@', furl)
- assert m
- nodeid = b32decode(m.group(1).upper())
- return (nodeid, service_name)
-
-class RemoteServiceConnector:
- """I hold information about a peer service that we want to connect to. If
- we are connected, I hold the RemoteReference, the peer's address, and the
- peer's version information. I remember information about when we were
- last connected to the peer too, even if we aren't currently connected.
-
- @ivar announcement_time: when we first heard about this service
- @ivar last_connect_time: when we last established a connection
- @ivar last_loss_time: when we last lost a connection
-
- @ivar version: the peer's version, from the most recent announcement
- @ivar oldest_supported: the peer's oldest supported version, same
- @ivar nickname: the peer's self-reported nickname, same
-
- @ivar rref: the RemoteReference, if connected, otherwise None
- @ivar remote_host: the IAddress, if connected, otherwise None
- """
-
- def __init__(self, announcement, tub, ic):
- self._tub = tub
- self._announcement = announcement
- self._ic = ic
- (furl, service_name, ri_name, nickname, ver, oldest) = announcement
-
- self._furl = furl
- m = re.match(r'pb://(\w+)@', furl)
- assert m
- self._nodeid = b32decode(m.group(1).upper())
- self._nodeid_s = idlib.shortnodeid_b2a(self._nodeid)
-
- self.service_name = service_name
-
- self.log("attempting to connect to %s" % self._nodeid_s)
- self.announcement_time = time.time()
- self.last_loss_time = None
- self.rref = None
- self.remote_host = None
- self.last_connect_time = None
- self.version = ver
- self.oldest_supported = oldest
- self.nickname = nickname
-
- def log(self, *args, **kwargs):
- return self._ic.log(*args, **kwargs)
-
- def startConnecting(self):
- self._reconnector = self._tub.connectTo(self._furl, self._got_service)
-
- def stopConnecting(self):
- self._reconnector.stopConnecting()
-
- def _got_service(self, rref):
- self.last_connect_time = time.time()
- self.remote_host = rref.tracker.broker.transport.getPeer()
-
- self.rref = rref
- self.log("connected to %s" % self._nodeid_s)
-
- self._ic.add_connection(self._nodeid, self.service_name, rref)
-
- rref.notifyOnDisconnect(self._lost, rref)
-
- def _lost(self, rref):
- self.log("lost connection to %s" % self._nodeid_s)
- self.last_loss_time = time.time()
- self.rref = None
- self.remote_host = None
- self._ic.remove_connection(self._nodeid, self.service_name, rref)
-
- def reset(self):
- self._reconnector.reset()
-
-
-class IntroducerClient_V1(service.Service, Referenceable):
- implements(RIIntroducerSubscriberClient, IIntroducerClient)
-
- def __init__(self, tub, introducer_furl,
- nickname, my_version, oldest_supported):
- self._tub = tub
- self.introducer_furl = introducer_furl
-
- self._nickname = nickname
- self._my_version = my_version
- self._oldest_supported = oldest_supported
-
- self._published_announcements = set()
-
- self._publisher = None
- self._connected = False
-
- self._subscribed_service_names = set()
- self._subscriptions = set() # requests we've actually sent
- self._received_announcements = set()
- # TODO: this set will grow without bound, until the node is restarted
-
- # we only accept one announcement per (peerid+service_name) pair.
- # This insures that an upgraded host replace their previous
- # announcement. It also means that each peer must have their own Tub
- # (no sharing), which is slightly weird but consistent with the rest
- # of the Tahoe codebase.
- self._connectors = {} # k: (peerid+svcname), v: RemoteServiceConnector
- # self._connections is a set of (peerid, service_name, rref) tuples
- self._connections = set()
-
- self.counter = 0 # incremented each time we change state, for tests
- self.encoding_parameters = None
-
- def startService(self):
- service.Service.startService(self)
- rc = self._tub.connectTo(self.introducer_furl, self._got_introducer)
- self._introducer_reconnector = rc
- def connect_failed(failure):
- self.log("Initial Introducer connection failed: perhaps it's down",
- level=log.WEIRD, failure=failure)
- d = self._tub.getReference(self.introducer_furl)
- d.addErrback(connect_failed)
-
- def _got_introducer(self, publisher):
- self.log("connected to introducer")
- self._connected = True
- self._publisher = publisher
- publisher.notifyOnDisconnect(self._disconnected)
- self._maybe_publish()
- self._maybe_subscribe()
-
- def _disconnected(self):
- self.log("bummer, we've lost our connection to the introducer")
- self._connected = False
- self._publisher = None
- self._subscriptions.clear()
-
- def stopService(self):
- service.Service.stopService(self)
- self._introducer_reconnector.stopConnecting()
- for rsc in self._connectors.itervalues():
- rsc.stopConnecting()
-
- def log(self, *args, **kwargs):
- if "facility" not in kwargs:
- kwargs["facility"] = "tahoe.introducer"
- return log.msg(*args, **kwargs)
-
-
- def publish(self, furl, service_name, remoteinterface_name):
- ann = (furl, service_name, remoteinterface_name,
- self._nickname, self._my_version, self._oldest_supported)
- self._published_announcements.add(ann)
- self._maybe_publish()
-
- def subscribe_to(self, service_name):
- self._subscribed_service_names.add(service_name)
- self._maybe_subscribe()
-
- def _maybe_subscribe(self):
- if not self._publisher:
- self.log("want to subscribe, but no introducer yet",
- level=log.NOISY)
- return
- for service_name in self._subscribed_service_names:
- if service_name not in self._subscriptions:
- # there is a race here, but the subscription desk ignores
- # duplicate requests.
- self._subscriptions.add(service_name)
- d = self._publisher.callRemote("subscribe", self, service_name)
- d.addErrback(log.err, facility="tahoe.introducer",
- level=log.WEIRD)
-
- def _maybe_publish(self):
- if not self._publisher:
- self.log("want to publish, but no introducer yet", level=log.NOISY)
- return
- # this re-publishes everything. The Introducer ignores duplicates
- for ann in self._published_announcements:
- d = self._publisher.callRemote("publish", ann)
- d.addErrback(log.err, facility="tahoe.introducer",
- level=log.WEIRD)
-
-
-
- def remote_announce(self, announcements):
- for ann in announcements:
- self.log("received %d announcements" % len(announcements))
- (furl, service_name, ri_name, nickname, ver, oldest) = ann
- if service_name not in self._subscribed_service_names:
- self.log("announcement for a service we don't care about [%s]"
- % (service_name,), level=log.WEIRD)
- continue
- if ann in self._received_announcements:
- self.log("ignoring old announcement: %s" % (ann,),
- level=log.NOISY)
- continue
- self.log("new announcement[%s]: %s" % (service_name, ann))
- self._received_announcements.add(ann)
- self._new_announcement(ann)
-
- def _new_announcement(self, announcement):
- # this will only be called for new announcements
- index = make_index(announcement)
- if index in self._connectors:
- self.log("replacing earlier announcement", level=log.NOISY)
- self._connectors[index].stopConnecting()
- rsc = RemoteServiceConnector(announcement, self._tub, self)
- self._connectors[index] = rsc
- rsc.startConnecting()
-
- def add_connection(self, nodeid, service_name, rref):
- self._connections.add( (nodeid, service_name, rref) )
- self.counter += 1
- # when one connection is established, reset the timers on all others,
- # to trigger a reconnection attempt in one second. This is intended
- # to accelerate server connections when we've been offline for a
- # while. The goal is to avoid hanging out for a long time with
- # connections to only a subset of the servers, which would increase
- # the chances that we'll put shares in weird places (and not update
- # existing shares of mutable files). See #374 for more details.
- for rsc in self._connectors.values():
- rsc.reset()
-
- def remove_connection(self, nodeid, service_name, rref):
- self._connections.discard( (nodeid, service_name, rref) )
- self.counter += 1
-
-
- def get_all_connections(self):
- return frozenset(self._connections)
-
- def get_all_connectors(self):
- return self._connectors.copy()
-
- def get_all_peerids(self):
- return frozenset([peerid
- for (peerid, service_name, rref)
- in self._connections])
-
- def get_nickname_for_peerid(self, peerid):
- for k in self._connectors:
- (peerid0, svcname0) = k
- if peerid0 == peerid:
- rsc = self._connectors[k]
- return rsc.nickname
- return None
-
- def get_all_connections_for(self, service_name):
- return frozenset([c
- for c in self._connections
- if c[1] == service_name])
-
- def get_permuted_peers(self, service_name, key):
- """Return an ordered list of (peerid, rref) tuples."""
-
- results = []
- for (c_peerid, c_service_name, rref) in self._connections:
- assert isinstance(c_peerid, str)
- if c_service_name != service_name:
- continue
- permuted = sha.new(key + c_peerid).digest()
- results.append((permuted, c_peerid, rref))
-
- results.sort(lambda a,b: cmp(a[0], b[0]))
- return [ (r[1], r[2]) for r in results ]
-
-
-
- def remote_set_encoding_parameters(self, parameters):
- self.encoding_parameters = parameters
-
- def connected_to_introducer(self):
- return self._connected
-
- def debug_disconnect_from_peerid(self, victim_nodeid):
- # for unit tests: locate and sever all connections to the given
- # peerid.
- for (nodeid, service_name, rref) in self._connections:
- if nodeid == victim_nodeid:
- rref.tracker.broker.transport.loseConnection()
-
-
-class IntroducerService_V1(service.MultiService, Referenceable):
- implements(RIIntroducerPublisherAndSubscriberService)
- name = "introducer"
-
- def __init__(self, basedir="."):
- service.MultiService.__init__(self)
- self.introducer_url = None
- # 'index' is (tubid, service_name)
- self._announcements = {} # dict of index -> (announcement, timestamp)
- self._subscribers = {} # dict of (rref->timestamp) dicts
-
- def log(self, *args, **kwargs):
- if "facility" not in kwargs:
- kwargs["facility"] = "tahoe.introducer"
- return log.msg(*args, **kwargs)
-
- def get_announcements(self):
- return self._announcements
- def get_subscribers(self):
- return self._subscribers
-
- def remote_publish(self, announcement):
- self.log("introducer: announcement published: %s" % (announcement,) )
- index = make_index(announcement)
- if index in self._announcements:
- (old_announcement, timestamp) = self._announcements[index]
- if old_announcement == announcement:
- self.log("but we already knew it, ignoring", level=log.NOISY)
- return
- else:
- self.log("old announcement being updated", level=log.NOISY)
- self._announcements[index] = (announcement, time.time())
- (furl, service_name, ri_name, nickname, ver, oldest) = announcement
- for s in self._subscribers.get(service_name, []):
- s.callRemote("announce", set([announcement]))
-
- def remote_subscribe(self, subscriber, service_name):
- self.log("introducer: subscription[%s] request at %s" % (service_name,
- subscriber))
- if service_name not in self._subscribers:
- self._subscribers[service_name] = {}
- subscribers = self._subscribers[service_name]
- if subscriber in subscribers:
- self.log("but they're already subscribed, ignoring",
- level=log.UNUSUAL)
- return
- subscribers[subscriber] = time.time()
- def _remove():
- self.log("introducer: unsubscribing[%s] %s" % (service_name,
- subscriber))
- subscribers.pop(subscriber, None)
- subscriber.notifyOnDisconnect(_remove)
-
- announcements = set( [ ann
- for idx,(ann,when) in self._announcements.items()
- if idx[1] == service_name] )
- d = subscriber.callRemote("announce", announcements)
- d.addErrback(log.err, facility="tahoe.introducer", level=log.UNUSUAL)
projects / tahoe-lafs / tahoe-lafs.git / commitdiff