async def test_request(
message_dispatcher,
remote_enr,
remote_endpoint,
incoming_message_channels,
outgoing_message_channels,
nursery,
):
request_id = message_dispatcher.get_free_request_id(remote_enr.node_id)
request = PingMessageFactory(request_id=request_id)
response = PingMessageFactory(request_id=request_id)
async def handle_request_on_remote():
outgoing_message = await outgoing_message_channels[1].receive()
assert outgoing_message.message == request
assert outgoing_message.receiver_endpoint == remote_endpoint
assert outgoing_message.receiver_node_id == remote_enr.node_id
await incoming_message_channels[0].send(
IncomingMessage(
message=response,
sender_endpoint=remote_endpoint,
sender_node_id=remote_enr.node_id,
))
nursery.start_soon(handle_request_on_remote)
received_response = await message_dispatcher.request(
remote_enr.node_id, request)
assert received_response.message == response
assert received_response.sender_endpoint == remote_endpoint
assert received_response.sender_node_id == remote_enr.node_id
async def test_packer_full_handshake(nursery, packer, remote_packer, enr,
remote_enr, endpoint, remote_endpoint,
outgoing_message_channels,
remote_outgoing_message_channels,
incoming_message_channels,
remote_incoming_message_channels):
# to remote
outgoing_message = OutgoingMessage(
message=PingMessageFactory(),
receiver_endpoint=remote_endpoint,
receiver_node_id=remote_enr.node_id,
)
outgoing_message_channels[0].send_nowait(outgoing_message)
with trio.fail_after(0.5):
incoming_message = await remote_incoming_message_channels[1].receive()
assert incoming_message.message == outgoing_message.message
assert incoming_message.sender_endpoint == endpoint
assert incoming_message.sender_node_id == enr.node_id
# from remote
outgoing_message = OutgoingMessage(
message=PingMessageFactory(),
receiver_endpoint=endpoint,
receiver_node_id=enr.node_id,
)
remote_outgoing_message_channels[0].send_nowait(outgoing_message)
with trio.fail_after(0.5):
incoming_message = await incoming_message_channels[1].receive()
assert incoming_message.message == outgoing_message.message
assert incoming_message.sender_endpoint == remote_endpoint
assert incoming_message.sender_node_id == remote_enr.node_id
def test_successful_handshake():
initiator_private_key = PrivateKeyFactory().to_bytes()
recipient_private_key = PrivateKeyFactory().to_bytes()
initiator_enr = ENRFactory(private_key=initiator_private_key)
recipient_enr = ENRFactory(private_key=recipient_private_key)
initial_message = PingMessageFactory()
initiator = HandshakeInitiatorFactory(
local_private_key=initiator_private_key,
local_enr=initiator_enr,
remote_enr=recipient_enr,
initial_message=initial_message,
)
recipient = HandshakeRecipientFactory(
local_private_key=recipient_private_key,
local_enr=recipient_enr,
remote_enr=initiator_enr,
initiating_packet_auth_tag=initiator.first_packet_to_send.auth_tag)
initiator_result = initiator.complete_handshake(
recipient.first_packet_to_send)
recipient_result = recipient.complete_handshake(
initiator_result.auth_header_packet)
assert_session_keys_equal(initiator_result.session_keys,
recipient_result.session_keys)
assert initiator_result.message is None
assert initiator_result.enr is None
assert initiator_result.auth_header_packet is not None
assert recipient_result.message == initial_message
assert recipient_result.enr is None
assert recipient_result.auth_header_packet is None
async def test_ping_handler_requests_updated_enr(ping_handler,
incoming_message_channels,
outgoing_message_channels,
local_enr, remote_enr,
routing_table):
ping = PingMessageFactory(enr_seq=remote_enr.sequence_number + 1)
incoming_message = IncomingMessageFactory(message=ping)
await incoming_message_channels[0].send(incoming_message)
await wait_all_tasks_blocked()
first_outgoing_message = outgoing_message_channels[1].receive_nowait()
await wait_all_tasks_blocked()
second_outgoing_message = outgoing_message_channels[1].receive_nowait()
assert {
first_outgoing_message.message.__class__,
second_outgoing_message.message.__class__,
} == {PongMessage, FindNodeMessage}
outgoing_find_node = (first_outgoing_message if isinstance(
first_outgoing_message.message, FindNodeMessage) else
second_outgoing_message)
assert outgoing_find_node.message.distance == 0
assert outgoing_find_node.receiver_endpoint == incoming_message.sender_endpoint
assert outgoing_find_node.receiver_node_id == incoming_message.sender_node_id
async def test_ping_handler_sends_pong(ping_handler, incoming_message_channels,
outgoing_message_channels, local_enr):
ping = PingMessageFactory()
incoming_message = IncomingMessageFactory(message=ping)
await incoming_message_channels[0].send(incoming_message)
await wait_all_tasks_blocked()
outgoing_message = outgoing_message_channels[1].receive_nowait()
assert isinstance(outgoing_message.message, PongMessage)
assert outgoing_message.message.request_id == ping.request_id
assert outgoing_message.message.enr_seq == local_enr.sequence_number
assert outgoing_message.receiver_endpoint == incoming_message.sender_endpoint
assert outgoing_message.receiver_node_id == incoming_message.sender_node_id
async def test_peer_packer_sends_auth_header(
peer_packer,
enr,
remote_private_key,
remote_enr,
remote_endpoint,
incoming_packet_channels,
outgoing_packet_channels,
outgoing_message_channels,
nursery,
):
outgoing_message = OutgoingMessage(
PingMessageFactory(),
remote_endpoint,
peer_packer.remote_node_id,
)
outgoing_message_channels[0].send_nowait(outgoing_message)
with trio.fail_after(0.5):
outgoing_auth_tag_packet = await outgoing_packet_channels[1].receive()
handshake_recipient = HandshakeRecipientFactory(
local_private_key=remote_private_key,
local_enr=remote_enr,
remote_private_key=peer_packer.local_private_key,
remote_enr=enr,
remote_node_id=peer_packer.local_node_id,
initiating_packet_auth_tag=outgoing_auth_tag_packet.packet.auth_tag,
)
incoming_packet = IncomingPacket(
handshake_recipient.first_packet_to_send,
sender_endpoint=remote_endpoint,
)
incoming_packet_channels[0].send_nowait(incoming_packet)
with trio.fail_after(0.5):
outgoing_auth_header_packet = await outgoing_packet_channels[
1].receive()
assert peer_packer.is_post_handshake
assert isinstance(outgoing_auth_header_packet.packet, AuthHeaderPacket)
assert outgoing_auth_header_packet.receiver_endpoint == remote_endpoint
handshake_result = handshake_recipient.complete_handshake(
outgoing_auth_header_packet.packet, )
initiator_keys = peer_packer.session_keys
recipient_keys = handshake_result.session_keys
assert initiator_keys.auth_response_key == recipient_keys.auth_response_key
assert initiator_keys.encryption_key == recipient_keys.decryption_key
assert initiator_keys.decryption_key == recipient_keys.encryption_key
async def test_peer_packer_initiates_handshake(peer_packer,
outgoing_message_channels,
outgoing_packet_channels,
nursery):
outgoing_message = OutgoingMessage(
PingMessageFactory(),
EndpointFactory(),
peer_packer.remote_node_id,
)
outgoing_message_channels[0].send_nowait(outgoing_message)
with trio.fail_after(0.5):
outgoing_packet = await outgoing_packet_channels[1].receive()
assert peer_packer.is_during_handshake
assert outgoing_packet.receiver_endpoint == outgoing_message.receiver_endpoint
assert isinstance(outgoing_packet.packet, AuthTagPacket)
async def test_request_handling(message_dispatcher, incoming_message_channels,
remote_enr, remote_endpoint):
ping_send_channel, ping_receive_channel = trio.open_memory_channel(0)
async with message_dispatcher.add_request_handler(
PingMessage) as request_subscription:
incoming_message = IncomingMessage(
message=PingMessageFactory(),
sender_endpoint=remote_endpoint,
sender_node_id=remote_enr.node_id,
)
await incoming_message_channels[0].send(incoming_message)
with trio.fail_after(1):
handled_incoming_message = await request_subscription.receive()
assert handled_incoming_message == incoming_message
async def test_ping_handler_updates_routing_table(ping_handler,
incoming_message_channels,
outgoing_message_channels,
local_enr, remote_enr,
routing_table):
other_node_id = NodeIDFactory()
routing_table.add(other_node_id)
assert routing_table.get_oldest_entry() == remote_enr.node_id
ping = PingMessageFactory()
incoming_message = IncomingMessageFactory(
message=ping,
sender_node_id=remote_enr.node_id,
)
await incoming_message_channels[0].send(incoming_message)
await wait_all_tasks_blocked()
assert routing_table.get_oldest_entry() == other_node_id
async def test_response_handling(message_dispatcher, remote_enr,
incoming_message_channels):
request_id = message_dispatcher.get_free_request_id(remote_enr.node_id)
async with message_dispatcher.add_response_handler(
remote_enr.node_id,
request_id,
) as response_subscription:
incoming_message = IncomingMessage(
message=PingMessageFactory(request_id=request_id, ),
sender_endpoint=remote_endpoint,
sender_node_id=remote_enr.node_id,
)
await incoming_message_channels[0].send(incoming_message)
with trio.fail_after(1):
handled_response = await response_subscription.receive()
assert handled_response == incoming_message
async def test_packer_sends_packets(nursery, packer, remote_enr,
remote_endpoint, outgoing_message_channels,
outgoing_packet_channels):
assert not packer.is_peer_packer_registered(remote_enr.node_id)
# send message
outgoing_message = OutgoingMessage(
message=PingMessageFactory(),
receiver_endpoint=remote_endpoint,
receiver_node_id=remote_enr.node_id,
)
outgoing_message_channels[0].send_nowait(outgoing_message)
with trio.fail_after(0.5):
outgoing_packet = await outgoing_packet_channels[1].receive()
assert packer.is_peer_packer_registered(remote_enr.node_id)
assert isinstance(outgoing_packet.packet, AuthTagPacket)
assert outgoing_packet.receiver_endpoint == remote_endpoint
async def test_ping_handler_updates_routing_table(ping_handler_service,
incoming_message_channels,
outgoing_message_channels,
local_enr,
remote_enr,
routing_table):
distance = compute_log_distance(remote_enr.node_id, local_enr.node_id)
other_node_id = NodeIDFactory.at_log_distance(local_enr.node_id, distance)
routing_table.update(other_node_id)
assert routing_table.get_nodes_at_log_distance(distance) == (other_node_id, remote_enr.node_id)
ping = PingMessageFactory()
incoming_message = IncomingMessageFactory(
message=ping,
sender_node_id=remote_enr.node_id,
)
await incoming_message_channels[0].send(incoming_message)
await wait_all_tasks_blocked()
assert routing_table.get_nodes_at_log_distance(distance) == (remote_enr.node_id, other_node_id)