101 lines
3.4 KiB
Python
101 lines
3.4 KiB
Python
import trio
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from typing import List, Sequence, Tuple
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import multiaddr
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from libp2p import new_node
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from libp2p.host.basic_host import BasicHost
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from libp2p.host.host_interface import IHost
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from libp2p.kademlia.network import KademliaServer
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from libp2p.network.stream.net_stream_interface import INetStream
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from libp2p.network.swarm import Swarm
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from libp2p.peer.peerinfo import info_from_p2p_addr
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from libp2p.routing.interfaces import IPeerRouting
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from libp2p.routing.kademlia.kademlia_peer_router import KadmeliaPeerRouter
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from libp2p.typing import StreamHandlerFn, TProtocol
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from .constants import MAX_READ_LEN
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async def connect_swarm(swarm_0: Swarm, swarm_1: Swarm) -> None:
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peer_id = swarm_1.get_peer_id()
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addrs = tuple(
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addr
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for transport in swarm_1.listeners.values()
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for addr in transport.get_addrs()
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)
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swarm_0.peerstore.add_addrs(peer_id, addrs, 10000)
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await swarm_0.dial_peer(peer_id)
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assert swarm_0.get_peer_id() in swarm_1.connections
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assert swarm_1.get_peer_id() in swarm_0.connections
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async def connect(node1: IHost, node2: IHost) -> None:
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"""Connect node1 to node2."""
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addr = node2.get_addrs()[0]
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info = info_from_p2p_addr(addr)
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await node1.connect(info)
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async def set_up_nodes_by_transport_opt(
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transport_opt_list: Sequence[Sequence[str]], nursery: trio.Nursery
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) -> Tuple[BasicHost, ...]:
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nodes_list = []
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for transport_opt in transport_opt_list:
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node = new_node(transport_opt=transport_opt)
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await node.get_network().listen(
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multiaddr.Multiaddr(transport_opt[0]), nursery=nursery
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)
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nodes_list.append(node)
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return tuple(nodes_list)
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async def set_up_nodes_by_transport_and_disc_opt(
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transport_disc_opt_list: Sequence[Tuple[Sequence[str], IPeerRouting]]
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) -> Tuple[BasicHost, ...]:
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nodes_list = []
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for transport_opt, disc_opt in transport_disc_opt_list:
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node = await new_node(transport_opt=transport_opt, disc_opt=disc_opt)
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await node.get_network().listen(multiaddr.Multiaddr(transport_opt[0]))
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nodes_list.append(node)
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return tuple(nodes_list)
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async def set_up_routers(
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router_confs: Tuple[int, int] = (0, 0)
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) -> List[KadmeliaPeerRouter]:
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"""The default ``router_confs`` selects two free ports local to this
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machine."""
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bootstrap_node = KademliaServer() # type: ignore
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await bootstrap_node.listen(router_confs[0])
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routers = [KadmeliaPeerRouter(bootstrap_node)]
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for port in router_confs[1:]:
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node = KademliaServer() # type: ignore
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await node.listen(port)
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await node.bootstrap_node(bootstrap_node.address)
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routers.append(KadmeliaPeerRouter(node))
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return routers
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async def echo_stream_handler(stream: INetStream) -> None:
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while True:
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read_string = (await stream.read(MAX_READ_LEN)).decode()
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resp = "ack:" + read_string
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await stream.write(resp.encode())
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async def perform_two_host_set_up(
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handler: StreamHandlerFn = echo_stream_handler
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) -> Tuple[BasicHost, BasicHost]:
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transport_opt_list = [["/ip4/127.0.0.1/tcp/0"], ["/ip4/127.0.0.1/tcp/0"]]
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(node_a, node_b) = await set_up_nodes_by_transport_opt(transport_opt_list)
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node_b.set_stream_handler(TProtocol("/echo/1.0.0"), handler)
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# Associate the peer with local ip address (see default parameters of Libp2p())
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node_a.get_peerstore().add_addrs(node_b.get_id(), node_b.get_addrs(), 10)
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return node_a, node_b
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