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https://github.com/m-labs/artiq.git
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60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
import logging
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import socket
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import sys
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from artiq.coredevice.comm_generic import CommGeneric
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logger = logging.getLogger(__name__)
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def set_keepalive(sock, after_idle, interval, max_fails):
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if sys.platform.startswith("linux"):
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, after_idle)
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sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, interval)
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sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, max_fails)
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elif sys.platform.startswith("win") or sys.platform.startswith("cygwin"):
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# setting max_fails is not supported, typically ends up being 5 or 10
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# depending on Windows version
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sock.ioctl(socket.SIO_KEEPALIVE_VALS,
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(1, after_idle*1000, interval*1000))
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else:
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logger.warning("TCP keepalive not supported on platform '%s', ignored",
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sys.platform)
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class Comm(CommGeneric):
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def __init__(self, dmgr, host, port=1381):
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super().__init__()
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self.host = host
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self.port = port
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def open(self):
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if hasattr(self, "socket"):
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return
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self.socket = socket.create_connection((self.host, self.port), 5.0)
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self.socket.settimeout(None)
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set_keepalive(self.socket, 3, 2, 3)
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logger.debug("connected to host %s on port %d", self.host, self.port)
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self.write(b"ARTIQ coredev\n")
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def close(self):
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if not hasattr(self, "socket"):
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return
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self.socket.close()
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del self.socket
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logger.debug("disconnected")
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def read(self, length):
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r = bytes()
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while len(r) < length:
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rn = self.socket.recv(min(8192, length - len(r)))
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if not rn:
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raise IOError("Connection closed")
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r += rn
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return r
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def write(self, data):
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self.socket.sendall(data)
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