119 lines
3.7 KiB
Python
119 lines
3.7 KiB
Python
import asyncio
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import multiaddr
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from Crypto.PublicKey import RSA
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from .peer.peerstore import PeerStore
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from .peer.id import id_from_public_key
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from .network.swarm import Swarm
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from .host.basic_host import BasicHost
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from .kademlia.routed_host import RoutedHost
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from .transport.upgrader import TransportUpgrader
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from .transport.tcp.tcp import TCP
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from .kademlia.network import KademliaServer
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async def cleanup_done_tasks():
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"""
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clean up asyncio done tasks to free up resources
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"""
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while True:
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for task in asyncio.all_tasks():
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if task.done():
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await task
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# Need not run often
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# Some sleep necessary to context switch
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await asyncio.sleep(3)
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def generate_id():
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new_key = RSA.generate(2048, e=65537)
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new_id = id_from_public_key(new_key.publickey())
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# private_key = new_key.exportKey("PEM")
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return new_id
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def initialize_default_kademlia(
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ksize=20, alpha=3, id_opt=None, storage=None):
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"""
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initialize swam when no swarm is passed in
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:param ksize: The k parameter from the paper
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:param alpha: The alpha parameter from the paper
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:param id_opt: optional id for host
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:param storage: An instance that implements
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:interface:`~kademlia.storage.IStorage`
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:return: return a default kademlia instance
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"""
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if not id_opt:
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id_opt = generate_id()
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node_id = id_opt.get_raw_id()
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return KademliaServer(ksize=ksize, alpha=alpha,
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node_id=node_id, storage=storage)
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def initialize_default_swarm(
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id_opt=None, transport_opt=None,
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muxer_opt=None, sec_opt=None, peerstore_opt=None):
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"""
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initialize swarm when no swarm is passed in
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:param id_opt: optional id for host
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:param transport_opt: optional choice of transport upgrade
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:param muxer_opt: optional choice of stream muxer
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:param sec_opt: optional choice of security upgrade
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:param peerstore_opt: optional peerstore
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:return: return a default swarm instance
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"""
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# pylint: disable=too-many-arguments, unused-argument
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if not id_opt:
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id_opt = generate_id()
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transport_opt = transport_opt or ["/ip4/127.0.0.1/tcp/8001"]
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transport = [multiaddr.Multiaddr(t) for t in transport_opt]
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# TODO wire muxer up with swarm
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# muxer = muxer_opt or ["mplex/6.7.0"]
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sec = sec_opt or ["secio"]
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peerstore = peerstore_opt or PeerStore()
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upgrader = TransportUpgrader(sec, transport)
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swarm_opt = Swarm(id_opt, peerstore, upgrader)
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tcp = TCP()
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swarm_opt.add_transport(tcp)
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return swarm_opt
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async def new_node(
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swarm_opt=None, id_opt=None, transport_opt=None,
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muxer_opt=None, sec_opt=None, peerstore_opt=None,
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disc_opt=None):
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"""
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create new libp2p node
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:param id_opt: optional id for host
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:param transport_opt: optional choice of transport upgrade
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:param muxer_opt: optional choice of stream muxer
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:param sec_opt: optional choice of security upgrade
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:param peerstore_opt: optional peerstore
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:return: return a default swarm instance
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"""
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# pylint: disable=too-many-arguments
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if not id_opt:
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id_opt = generate_id()
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if not swarm_opt:
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swarm_opt = initialize_default_swarm(
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id_opt=id_opt, transport_opt=transport_opt,
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muxer_opt=muxer_opt, sec_opt=sec_opt,
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peerstore_opt=peerstore_opt)
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if not disc_opt:
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disc_opt = initialize_default_kademlia(ksize=20, alpha=3,
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id_opt=id_opt, storage=None)
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# TODO enable support for other host type
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# TODO routing unimplemented
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host = RoutedHost(swarm_opt, disc_opt)
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# Kick off cleanup job
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asyncio.ensure_future(cleanup_done_tasks())
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return host
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