def isOpen()

in vmassist/linux/vmassist.py [0:0]

• 12 lines of code
• 7 McCabe index (conditional complexity)

def isOpen(ip, port):
  # return true/false if the remote port is/isn't listening, only takes an IP, no DNS is done
  # using connect_ex would give us the error code for analysis, but we're just going for true/false here
  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
  s.settimeout(2)
  try:
    is_open = s.connect((ip, int(port))) == 0 # True if open, False if not
    if is_open:
      s.shutdown(socket.SHUT_RDWR)
    return True
  except Exception:
    is_open = False
  s.close()
  return is_open