316 lines
12 KiB
Python
316 lines
12 KiB
Python
import logging
|
|
import miniupnpc
|
|
from twisted.internet import threads, defer
|
|
from lbrynet.core.BlobManager import DiskBlobManager
|
|
from lbrynet.dht import node, peerfinder, peermanager, hashannouncer
|
|
from lbrynet.database.storage import SQLiteStorage
|
|
from lbrynet.core.RateLimiter import RateLimiter
|
|
from lbrynet.core.utils import generate_id
|
|
from lbrynet.core.PaymentRateManager import BasePaymentRateManager, NegotiatedPaymentRateManager
|
|
from lbrynet.core.BlobAvailability import BlobAvailabilityTracker
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class Session(object):
|
|
"""This class manages all important services common to any application that uses the network.
|
|
|
|
the hash announcer, which informs other peers that this peer is
|
|
associated with some hash. Usually, this means this peer has a
|
|
blob identified by the hash in question, but it can be used for
|
|
other purposes.
|
|
|
|
the peer finder, which finds peers that are associated with some
|
|
hash.
|
|
|
|
the blob manager, which keeps track of which blobs have been
|
|
downloaded and provides access to them,
|
|
|
|
the rate limiter, which attempts to ensure download and upload
|
|
rates stay below a set maximum
|
|
|
|
upnp, which opens holes in compatible firewalls so that remote
|
|
peers can connect to this peer.
|
|
"""
|
|
|
|
def __init__(self, blob_data_payment_rate, db_dir=None,
|
|
node_id=None, peer_manager=None, dht_node_port=None,
|
|
known_dht_nodes=None, peer_finder=None,
|
|
hash_announcer=None, blob_dir=None,
|
|
blob_manager=None, peer_port=None, use_upnp=True,
|
|
rate_limiter=None, wallet=None,
|
|
dht_node_class=node.Node, blob_tracker_class=None,
|
|
payment_rate_manager_class=None, is_generous=True, external_ip=None, storage=None):
|
|
"""@param blob_data_payment_rate: The default payment rate for blob data
|
|
|
|
@param db_dir: The directory in which levelDB files should be stored
|
|
|
|
@param node_id: The unique ID of this node
|
|
|
|
@param peer_manager: An object which keeps track of all known
|
|
peers. If None, a PeerManager will be created
|
|
|
|
@param dht_node_port: The port on which the dht node should
|
|
listen for incoming connections
|
|
|
|
@param known_dht_nodes: A list of nodes which the dht node
|
|
should use to bootstrap into the dht
|
|
|
|
@param peer_finder: An object which is used to look up peers
|
|
that are associated with some hash. If None, a
|
|
DHTPeerFinder will be used, which looks for peers in the
|
|
distributed hash table.
|
|
|
|
@param hash_announcer: An object which announces to other
|
|
peers that this peer is associated with some hash. If
|
|
None, and peer_port is not None, a DHTHashAnnouncer will
|
|
be used. If None and peer_port is None, a
|
|
DummyHashAnnouncer will be used, which will not actually
|
|
announce anything.
|
|
|
|
@param blob_dir: The directory in which blobs will be
|
|
stored. If None and blob_manager is None, blobs will be
|
|
stored in memory only.
|
|
|
|
@param blob_manager: An object which keeps track of downloaded
|
|
blobs and provides access to them. If None, and blob_dir
|
|
is not None, a DiskBlobManager will be used, with the
|
|
given blob_dir. If None and blob_dir is None, a
|
|
TempBlobManager will be used, which stores blobs in memory
|
|
only.
|
|
|
|
@param peer_port: The port on which other peers should connect
|
|
to this peer
|
|
|
|
@param use_upnp: Whether or not to try to open a hole in the
|
|
firewall so that outside peers can connect to this peer's
|
|
peer_port and dht_node_port
|
|
|
|
@param rate_limiter: An object which keeps track of the amount
|
|
of data transferred to and from this peer, and can limit
|
|
that rate if desired
|
|
|
|
@param wallet: An object which will be used to keep track of
|
|
expected payments and which will pay peers. If None, a
|
|
wallet which uses the Point Trader system will be used,
|
|
which is meant for testing only
|
|
|
|
"""
|
|
self.db_dir = db_dir
|
|
|
|
self.node_id = node_id
|
|
|
|
self.peer_manager = peer_manager
|
|
|
|
self.dht_node_port = dht_node_port
|
|
self.known_dht_nodes = known_dht_nodes
|
|
if self.known_dht_nodes is None:
|
|
self.known_dht_nodes = []
|
|
self.peer_finder = peer_finder
|
|
self.hash_announcer = hash_announcer
|
|
|
|
self.blob_dir = blob_dir
|
|
self.blob_manager = blob_manager
|
|
|
|
self.blob_tracker = None
|
|
self.blob_tracker_class = blob_tracker_class or BlobAvailabilityTracker
|
|
|
|
self.peer_port = peer_port
|
|
|
|
self.use_upnp = use_upnp
|
|
|
|
self.rate_limiter = rate_limiter
|
|
|
|
self.external_ip = external_ip
|
|
|
|
self.upnp_redirects = []
|
|
|
|
self.wallet = wallet
|
|
self.dht_node_class = dht_node_class
|
|
self.dht_node = None
|
|
|
|
self.base_payment_rate_manager = BasePaymentRateManager(blob_data_payment_rate)
|
|
self.payment_rate_manager = None
|
|
self.payment_rate_manager_class = payment_rate_manager_class or NegotiatedPaymentRateManager
|
|
self.is_generous = is_generous
|
|
self.storage = storage or SQLiteStorage(self.db_dir)
|
|
|
|
def setup(self):
|
|
"""Create the blob directory and database if necessary, start all desired services"""
|
|
|
|
log.debug("Starting session.")
|
|
|
|
if self.node_id is None:
|
|
self.node_id = generate_id()
|
|
|
|
if self.wallet is None:
|
|
from lbrynet.core.PTCWallet import PTCWallet
|
|
self.wallet = PTCWallet(self.db_dir)
|
|
|
|
if self.peer_manager is None:
|
|
self.peer_manager = peermanager.PeerManager()
|
|
|
|
if self.use_upnp is True:
|
|
d = self._try_upnp()
|
|
else:
|
|
d = defer.succeed(True)
|
|
|
|
if self.peer_finder is None:
|
|
d.addCallback(lambda _: self._setup_dht())
|
|
else:
|
|
if self.hash_announcer is None and self.peer_port is not None:
|
|
log.warning("The server has no way to advertise its available blobs.")
|
|
self.hash_announcer = hashannouncer.DummyHashAnnouncer()
|
|
|
|
d.addCallback(lambda _: self._setup_other_components())
|
|
return d
|
|
|
|
def shut_down(self):
|
|
"""Stop all services"""
|
|
log.info('Stopping session.')
|
|
ds = []
|
|
if self.blob_tracker is not None:
|
|
ds.append(defer.maybeDeferred(self.blob_tracker.stop))
|
|
if self.dht_node is not None:
|
|
ds.append(defer.maybeDeferred(self.dht_node.stop))
|
|
if self.rate_limiter is not None:
|
|
ds.append(defer.maybeDeferred(self.rate_limiter.stop))
|
|
if self.peer_finder is not None:
|
|
ds.append(defer.maybeDeferred(self.peer_finder.stop))
|
|
if self.hash_announcer is not None:
|
|
ds.append(defer.maybeDeferred(self.hash_announcer.stop))
|
|
if self.wallet is not None:
|
|
ds.append(defer.maybeDeferred(self.wallet.stop))
|
|
if self.blob_manager is not None:
|
|
ds.append(defer.maybeDeferred(self.blob_manager.stop))
|
|
if self.use_upnp is True:
|
|
ds.append(defer.maybeDeferred(self._unset_upnp))
|
|
return defer.DeferredList(ds)
|
|
|
|
def _try_upnp(self):
|
|
|
|
log.debug("In _try_upnp")
|
|
|
|
def get_free_port(upnp, port, protocol):
|
|
# returns an existing mapping if it exists
|
|
mapping = upnp.getspecificportmapping(port, protocol)
|
|
if not mapping:
|
|
return port
|
|
if upnp.lanaddr == mapping[0]:
|
|
return mapping
|
|
return get_free_port(upnp, port + 1, protocol)
|
|
|
|
def get_port_mapping(upnp, internal_port, protocol, description):
|
|
# try to map to the requested port, if there is already a mapping use the next external
|
|
# port available
|
|
if protocol not in ['UDP', 'TCP']:
|
|
raise Exception("invalid protocol")
|
|
external_port = get_free_port(upnp, internal_port, protocol)
|
|
if isinstance(external_port, tuple):
|
|
log.info("Found existing UPnP redirect %s:%i (%s) to %s:%i, using it",
|
|
self.external_ip, external_port[1], protocol, upnp.lanaddr, internal_port)
|
|
return external_port[1], protocol
|
|
upnp.addportmapping(external_port, protocol, upnp.lanaddr, internal_port,
|
|
description, '')
|
|
log.info("Set UPnP redirect %s:%i (%s) to %s:%i", self.external_ip, external_port,
|
|
protocol, upnp.lanaddr, internal_port)
|
|
return external_port, protocol
|
|
|
|
def threaded_try_upnp():
|
|
if self.use_upnp is False:
|
|
log.debug("Not using upnp")
|
|
return False
|
|
u = miniupnpc.UPnP()
|
|
num_devices_found = u.discover()
|
|
if num_devices_found > 0:
|
|
u.selectigd()
|
|
external_ip = u.externalipaddress()
|
|
if external_ip != '0.0.0.0' and not self.external_ip:
|
|
# best not to rely on this external ip, the router can be behind layers of NATs
|
|
self.external_ip = external_ip
|
|
if self.peer_port:
|
|
self.upnp_redirects.append(
|
|
get_port_mapping(u, self.peer_port, 'TCP', 'LBRY peer port')
|
|
)
|
|
if self.dht_node_port:
|
|
self.upnp_redirects.append(
|
|
get_port_mapping(u, self.dht_node_port, 'UDP', 'LBRY DHT port')
|
|
)
|
|
return True
|
|
return False
|
|
|
|
def upnp_failed(err):
|
|
log.warning("UPnP failed. Reason: %s", err.getErrorMessage())
|
|
return False
|
|
|
|
d = threads.deferToThread(threaded_try_upnp)
|
|
d.addErrback(upnp_failed)
|
|
return d
|
|
|
|
@defer.inlineCallbacks
|
|
def _setup_dht(self):
|
|
log.info("Starting DHT")
|
|
|
|
self.dht_node = self.dht_node_class(
|
|
udpPort=self.dht_node_port,
|
|
node_id=self.node_id,
|
|
externalIP=self.external_ip,
|
|
peerPort=self.peer_port
|
|
)
|
|
|
|
yield self.dht_node.joinNetwork(self.known_dht_nodes)
|
|
self.peer_finder = self.dht_node.peer_finder
|
|
self.hash_announcer = self.dht_node.hash_announcer
|
|
|
|
def _setup_other_components(self):
|
|
log.debug("Setting up the rest of the components")
|
|
|
|
if self.rate_limiter is None:
|
|
self.rate_limiter = RateLimiter()
|
|
|
|
if self.blob_manager is None:
|
|
if self.blob_dir is None:
|
|
raise Exception(
|
|
"TempBlobManager is no longer supported, specify BlobManager or db_dir")
|
|
else:
|
|
self.blob_manager = DiskBlobManager(
|
|
self.hash_announcer, self.blob_dir, self.storage
|
|
)
|
|
|
|
if self.blob_tracker is None:
|
|
self.blob_tracker = self.blob_tracker_class(
|
|
self.blob_manager, self.peer_finder, self.dht_node
|
|
)
|
|
if self.payment_rate_manager is None:
|
|
self.payment_rate_manager = self.payment_rate_manager_class(
|
|
self.base_payment_rate_manager, self.blob_tracker, self.is_generous
|
|
)
|
|
|
|
self.rate_limiter.start()
|
|
d = self.storage.setup()
|
|
d.addCallback(lambda _: self.blob_manager.setup())
|
|
d.addCallback(lambda _: self.wallet.start())
|
|
d.addCallback(lambda _: self.blob_tracker.start())
|
|
return d
|
|
|
|
def _unset_upnp(self):
|
|
log.info("Unsetting upnp for session")
|
|
|
|
def threaded_unset_upnp():
|
|
u = miniupnpc.UPnP()
|
|
num_devices_found = u.discover()
|
|
if num_devices_found > 0:
|
|
u.selectigd()
|
|
for port, protocol in self.upnp_redirects:
|
|
if u.getspecificportmapping(port, protocol) is None:
|
|
log.warning(
|
|
"UPnP redirect for %s %d was removed by something else.",
|
|
protocol, port)
|
|
else:
|
|
u.deleteportmapping(port, protocol)
|
|
log.info("Removed UPnP redirect for %s %d.", protocol, port)
|
|
self.upnp_redirects = []
|
|
|
|
d = threads.deferToThread(threaded_unset_upnp)
|
|
d.addErrback(lambda err: str(err))
|
|
return d
|