Source code for spinnman.connections.udp_packet_connections.sdp_connection

# Copyright (c) 2017-2019 The University of Manchester
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import struct
from spinn_utilities.overrides import overrides
from spinnman.messages.sdp import SDPMessage, SDPFlag
from .udp_connection import UDPConnection
from .utils import update_sdp_header_for_udp_send
from spinnman.connections.abstract_classes import (
    SDPReceiver, SDPSender, Listenable)

_TWO_SKIP = struct.Struct("<2x")
_REPR_TEMPLATE = "SDPConnection(chip_x={}, chip_y={}, local_host={},"\
    " local_port={}, remote_host={}, remote_port={})"


[docs]class SDPConnection(UDPConnection, SDPReceiver, SDPSender, Listenable): __slots__ = [ "_chip_x", "_chip_y"] def __init__(self, chip_x=None, chip_y=None, local_host=None, local_port=None, remote_host=None, remote_port=None): """ :param int chip_x: The optional x-coordinate of the chip at the remote end of the connection. If not specified, it will not be possible to send SDP messages that require a response with this connection. :param int chip_y: The optional y-coordinate of the chip at the remote end of the connection. If not specified, it will not be possible to send SDP messages that require a response with this connection. :param str local_host: The optional IP address or host name of the local interface to listen on :param int local_port: The optional local port to listen on :param str remote_host: The optional remote host name or IP address to send messages to. If not specified, sending will not be possible using this connection :param int remote_port: The optional remote port number to send messages to. If not specified, sending will not be possible using this connection """ # pylint: disable=too-many-arguments super().__init__(local_host, local_port, remote_host, remote_port) self._chip_x = chip_x self._chip_y = chip_y
[docs] @overrides(SDPReceiver.receive_sdp_message) def receive_sdp_message(self, timeout=None): data = self.receive(timeout) return SDPMessage.from_bytestring(data, 2)
[docs] @overrides(SDPSender.send_sdp_message) def send_sdp_message(self, sdp_message): # If a reply is expected, the connection should if sdp_message.sdp_header.flags == SDPFlag.REPLY_EXPECTED: update_sdp_header_for_udp_send( sdp_message.sdp_header, self._chip_x, self._chip_y) else: update_sdp_header_for_udp_send(sdp_message.sdp_header, 0, 0) self.send(_TWO_SKIP.pack() + sdp_message.bytestring)
[docs] @overrides(Listenable.get_receive_method) def get_receive_method(self): return self.receive_sdp_message
def __repr__(self): return _REPR_TEMPLATE.format( self._chip_x, self._chip_y, self.local_ip_address, self.local_port, self.remote_ip_address, self.remote_port)