artiq/artiq/coredevice/comm_tcp.py

77 lines
2.3 KiB
Python

import logging
import socket
import sys
from artiq.coredevice.comm_generic import CommGeneric
logger = logging.getLogger(__name__)
def set_keepalive(sock, after_idle, interval, max_fails):
if sys.platform.startswith("linux"):
sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, after_idle)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, interval)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, max_fails)
elif sys.platform.startswith("win") or sys.platform.startswith("cygwin"):
# setting max_fails is not supported, typically ends up being 5 or 10
# depending on Windows version
sock.ioctl(socket.SIO_KEEPALIVE_VALS,
(1, after_idle*1000, interval*1000))
else:
logger.warning("TCP keepalive not supported on platform '%s', ignored",
sys.platform)
def initialize_connection(host, port):
sock = socket.create_connection((host, port), 5.0)
sock.settimeout(None)
set_keepalive(sock, 3, 2, 3)
logger.debug("connected to host %s on port %d", host, port)
sock.sendall(b"ARTIQ coredev\n")
return sock
class Comm(CommGeneric):
def __init__(self, dmgr, host, port=1381, port_analyzer=1382):
super().__init__()
self.host = host
self.port = port
self.port_analyzer = port_analyzer
def open(self):
if hasattr(self, "socket"):
return
self.socket = initialize_connection(self.host, self.port)
def close(self):
if not hasattr(self, "socket"):
return
self.socket.close()
del self.socket
logger.debug("disconnected")
def read(self, length):
r = bytes()
while len(r) < length:
rn = self.socket.recv(min(8192, length - len(r)))
if not rn:
raise IOError("Connection closed")
r += rn
return r
def write(self, data):
self.socket.sendall(data)
def get_analyzer_dump(self):
sock = initialize_connection(self.host, self.port_analyzer)
r = bytes()
while True:
buf = sock.recv(8192)
if not buf:
break
r += buf
sock.close()
return r