Source code for spinnman.connections.udp_packet_connections.eieio_connection
# Copyright (c) 2015 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import struct
from .udp_connection import UDPConnection
from spinnman.connections.abstract_classes import Listenable
from spinnman.messages.eieio import (
read_eieio_command_message, read_eieio_data_message)
from spinn_utilities.overrides import overrides
_ONE_SHORT = struct.Struct("<H")
_REPR_TEMPLATE = "EIEIOConnection(local_host={}, local_port={},"\
"remote_host={}, remote_port={})"
[docs]class EIEIOConnection(UDPConnection, Listenable):
"""
A UDP connection for sending and receiving raw EIEIO messages.
"""
__slots__ = []
[docs] def receive_eieio_message(self, timeout=None):
"""
Receives an EIEIO message from this connection. Blocks until
a message has been received, or a timeout occurs.
:param int timeout:
The time in seconds to wait for the message to arrive; if not
specified, will wait forever, or until the connection is closed
:return: an EIEIO message
:rtype: AbstractEIEIOMessage
:raise SpinnmanIOException:
If there is an error receiving the message.
:raise SpinnmanTimeoutException:
If there is a timeout before a message is received.
:raise SpinnmanInvalidPacketException:
If the received packet is not a valid EIEIO message.
:raise SpinnmanInvalidParameterException:
If one of the fields of the EIEIO message is invalid.
"""
data = self.receive(timeout)
header = _ONE_SHORT.unpack_from(data)[0]
if header & 0xC000 == 0x4000:
return read_eieio_command_message(data, 0)
return read_eieio_data_message(data, 0)
[docs] def send_eieio_message(self, eieio_message):
"""
Sends an EIEIO message down this connection.
:param AbstractEIEIOMessage eieio_message:
The EIEIO message to be sent
:raise SpinnmanIOException:
If there is an error sending the message
"""
self.send(eieio_message.bytestring)
[docs] def send_eieio_message_to(self, eieio_message, ip_address, port):
self.send_to(eieio_message.bytestring, (ip_address, port))
[docs] @overrides(Listenable.get_receive_method)
def get_receive_method(self):
return self.receive_eieio_message
def __repr__(self):
return _REPR_TEMPLATE.format(
self.local_ip_address, self.local_port,
self.remote_ip_address, self.remote_port)