80 lines
2.9 KiB
Python
80 lines
2.9 KiB
Python
from typing import Mapping
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from libp2p.network.connection.raw_connection_interface import IRawConnection
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from libp2p.network.typing import GenericProtocolHandlerFn
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from libp2p.peer.id import ID
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from libp2p.protocol_muxer.exceptions import MultiselectClientError, MultiselectError
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from libp2p.security.exceptions import HandshakeFailure
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from libp2p.security.secure_conn_interface import ISecureConn
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from libp2p.security.secure_transport_interface import ISecureTransport
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from libp2p.security.security_multistream import SecurityMultistream
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from libp2p.stream_muxer.abc import IMuxedConn
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from libp2p.stream_muxer.muxer_multistream import MuxerClassType, MuxerMultistream
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from libp2p.transport.exceptions import (
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MuxerUpgradeFailure,
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SecurityUpgradeFailure,
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)
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from libp2p.typing import TProtocol
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from .listener_interface import IListener
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from .transport_interface import ITransport
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class TransportUpgrader:
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security_multistream: SecurityMultistream
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muxer_multistream: MuxerMultistream
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def __init__(
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self,
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secure_transports_by_protocol: Mapping[TProtocol, ISecureTransport],
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muxer_transports_by_protocol: Mapping[TProtocol, MuxerClassType],
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):
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self.security_multistream = SecurityMultistream(secure_transports_by_protocol)
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self.muxer_multistream = MuxerMultistream(muxer_transports_by_protocol)
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def upgrade_listener(self, transport: ITransport, listeners: IListener) -> None:
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"""
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Upgrade multiaddr listeners to libp2p-transport listeners
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"""
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# TODO: Figure out what to do with this function.
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pass
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async def upgrade_security(
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self, raw_conn: IRawConnection, peer_id: ID, initiator: bool
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) -> ISecureConn:
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"""
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Upgrade conn to a secured connection
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"""
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try:
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if initiator:
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return await self.security_multistream.secure_outbound(
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raw_conn, peer_id
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)
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return await self.security_multistream.secure_inbound(raw_conn)
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except (MultiselectError, MultiselectClientError) as error:
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raise SecurityUpgradeFailure(
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"failed to negotiate the secure protocol"
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) from error
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except HandshakeFailure as error:
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raise SecurityUpgradeFailure(
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"handshake failed when upgrading to secure connection"
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) from error
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async def upgrade_connection(
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self,
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conn: ISecureConn,
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generic_protocol_handler: GenericProtocolHandlerFn,
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peer_id: ID,
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) -> IMuxedConn:
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"""
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Upgrade secured connection to a muxed connection
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"""
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try:
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return await self.muxer_multistream.new_conn(
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conn, generic_protocol_handler, peer_id
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)
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except (MultiselectError, MultiselectClientError) as error:
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raise MuxerUpgradeFailure(
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"failed to negotiate the multiplexer protocol"
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) from error
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