Source code for spinnman.messages.scp.abstract_messages.scp_response
# Copyright (c) 2014 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.
from spinn_utilities.abstract_base import AbstractBase, abstractmethod
from spinnman.messages.sdp import SDPHeader
from spinnman.messages.scp import SCPResponseHeader
# The offset of the header from the start of a received packet
# (8 bytes of SDP header)
_SCP_HEADER_OFFSET = 8
# The offset of the data from the start of a received packet
# (8 bytes of SDP header + 4 bytes of SCP header)
_SCP_DATA_OFFSET = 12
[docs]class AbstractSCPResponse(object, metaclass=AbstractBase):
"""
Represents an abstract SCP Response.
"""
__slots__ = [
"_scp_response_header",
"_sdp_header"]
def __init__(self):
self._sdp_header = None
self._scp_response_header = None
[docs] def read_bytestring(self, data, offset):
"""
Reads a packet from a bytestring of data.
:param bytes data: The bytestring to be read
:param int offset:
The offset in the data from which the response should be read
"""
self._sdp_header = SDPHeader.from_bytestring(data, offset)
self._scp_response_header = SCPResponseHeader.from_bytestring(
data, _SCP_HEADER_OFFSET + offset)
self.read_data_bytestring(data, _SCP_DATA_OFFSET + offset)
[docs] @abstractmethod
def read_data_bytestring(self, data, offset):
"""
Reads the remainder of the data following the header.
:param bytes data: The bytestring to read from
:param int offset: The offset into the data after the headers
"""
@property
def sdp_header(self):
"""
The SDP header from the response.
:rtype: SDPHeader
"""
return self._sdp_header
@property
def scp_response_header(self):
"""
The SCP header from the response.
:rtype: SCPResponseHeader
"""
return self._scp_response_header