py-libp2p/host/basic_host.py
2018-12-28 01:56:00 -05:00

91 lines
2.8 KiB
Python

import multiaddr
from .host_interface import IHost
# Upon host creation, host takes in options,
# including the list of addresses on which to listen.
# Host then parses these options and delegates to its Network instance,
# telling it to listen on the given listen addresses.
class BasicHost(IHost):
# default options constructor
def __init__(self, _network):
self.network = _network
self.peerstore = self.network.peerstore
def get_id(self):
"""
:return: peer_id of host
"""
return self.network.get_peer_id()
def get_network(self):
"""
:return: network instance of host
"""
return self.network
def get_peerstore(self):
"""
:return: peerstore of the host (same one as in its network instance)
"""
return self.peerstore
def get_mux(self):
"""
:return: mux instance of host
"""
def get_addrs(self):
"""
:return: all the multiaddr addresses this host is listening too
"""
p2p_part = multiaddr.Multiaddr('/p2p/{}'.format(self.get_id().pretty()))
addrs = []
for transport in self.network.listeners.values():
for addr in transport.get_addrs():
addrs.append(addr.encapsulate(p2p_part))
return addrs
def set_stream_handler(self, protocol_id, stream_handler):
"""
set stream handler for host
:param protocol_id: protocol id used on stream
:param stream_handler: a stream handler function
:return: true if successful
"""
return self.network.set_stream_handler(protocol_id, stream_handler)
# protocol_id can be a list of protocol_ids
# stream will decide which protocol_id to run on
async def new_stream(self, peer_id, protocol_ids):
"""
:param peer_id: peer_id that host is connecting
:param protocol_id: protocol id that stream runs on
:return: true if successful
"""
stream = await self.network.new_stream(peer_id, protocol_ids)
return stream
async def connect(self, peer_info):
"""
connect ensures there is a connection between this host and the peer with
given peer_info.peer_id. connect will absorb the addresses in peer_info into its internal
peerstore. If there is not an active connection, connect will issue a
dial, and block until a connection is open, or an error is
returned.
:param peer_info: peer_info of the host we want to connect to
:type peer_info: peer.peerinfo.PeerInfo
"""
self.peerstore.add_addrs(peer_info.peer_id, peer_info.addrs, 10)
# there is already a connection to this peer
if peer_info.peer_id in self.network.connections:
return
await self.network.dial_peer(peer_info.peer_id)