56 lines
1.7 KiB
Python
56 lines
1.7 KiB
Python
import logging
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from multiaddr import Multiaddr
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from libp2p.host.host_interface import IHost
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from libp2p.network.stream.exceptions import StreamClosed
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from libp2p.network.stream.net_stream_interface import INetStream
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from libp2p.typing import StreamHandlerFn, TProtocol
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from .pb.identify_pb2 import Identify
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ID = TProtocol("/ipfs/id/1.0.0")
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PROTOCOL_VERSION = "ipfs/0.1.0"
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# TODO dynamically generate the agent version
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AGENT_VERSION = "py-libp2p/alpha"
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logger = logging.getLogger("libp2p.identity.identify")
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def _multiaddr_to_bytes(maddr: Multiaddr) -> bytes:
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return maddr.to_bytes()
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def _mk_identify_protobuf(host: IHost) -> Identify:
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public_key = host.get_public_key()
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laddrs = host.get_addrs()
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protocols = host.get_mux().get_protocols()
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return Identify(
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protocol_version=PROTOCOL_VERSION,
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agent_version=AGENT_VERSION,
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public_key=public_key.serialize(),
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listen_addrs=map(_multiaddr_to_bytes, laddrs),
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# TODO send observed address from ``stream``
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observed_addr=b"",
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protocols=protocols,
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)
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def identify_handler_for(host: IHost) -> StreamHandlerFn:
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async def handle_identify(stream: INetStream) -> None:
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peer_id = stream.muxed_conn.peer_id
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logger.debug("received a request for %s from %s", ID, peer_id)
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protobuf = _mk_identify_protobuf(host)
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response = protobuf.SerializeToString()
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try:
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await stream.write(response)
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except StreamClosed:
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logger.debug("Fail to respond to %s request: stream closed", ID)
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else:
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await stream.close()
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logger.debug("successfully handled request for %s from %s", ID, peer_id)
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return handle_identify
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