old_contents: '''
  Define some generic socket functions for network modules
  '''
  
  # Import python libs
  import socket
  from string import ascii_letters, digits
  
  
  def sanitize_host(host):
      '''
      Sanitize host string.
      '''
      return ''.join([
          c for c in host[0:255] if c in (ascii_letters + digits + '.-')
      ])
  
  
  def isportopen(host, port):
      '''
      Return status of a port
  
      CLI Example::
  
          salt '*' network.isportopen 127.0.0.1 22
      '''
  
      if not (1 <= int(port) <= 65535):
          return False
  
      sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      out = sock.connect_ex((sanitize_host(host), int(port)))
  
      return out
  
  
  def host_to_ip(host):
      '''
      Returns the IP address of a given hostname
  
      CLI Example::
  
          salt '*' network.host_to_ip example.com
      '''
      try:
          ip = socket.gethostbyname(host)
      except Exception:
          ip = None
      return ip
  
  def ip_to_host(ip):
      '''
      Returns the hostname of a given IP
  
      CLI Example::
  
          salt '*' network.ip_to_host 8.8.8.8
      '''
      try:
          hostname, aliaslist, ipaddrlist = socket.gethostbyaddr(ip)
      except Exception:
          hostname = None
      return hostname
  
new_contents: '''
  Define some generic socket functions for network modules
  '''
  
  # Import python libs
  import socket
  from string import ascii_letters, digits
  
  
  # pylint: disable-msg=C0103
  
  def sanitize_host(host):
      '''
      Sanitize host string.
      '''
      return ''.join([
          c for c in host[0:255] if c in (ascii_letters + digits + '.-')
      ])
  
  
  def isportopen(host, port):
      '''
      Return status of a port
  
      CLI Example::
  
          salt '*' network.isportopen 127.0.0.1 22
      '''
  
      if not (1 <= int(port) <= 65535):
          return False
  
      sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      out = sock.connect_ex((sanitize_host(host), int(port)))
  
      return out
  
  
  def host_to_ip(host):
      '''
      Returns the IP address of a given hostname
  
      CLI Example::
  
          salt '*' network.host_to_ip example.com
      '''
      try:
          ip = socket.gethostbyname(host)
      except Exception:
          ip = None
      return ip
  
  def ip_to_host(ip):
      '''
      Returns the hostname of a given IP
  
      CLI Example::
  
          salt '*' network.ip_to_host 8.8.8.8
      '''
      try:
          hostname, aliaslist, ipaddrlist = socket.gethostbyaddr(ip)
      except Exception:
          hostname = None
      return hostname
  
subject: Fix PyLint C0103 on `salt.utils.socket_util`. Refs #1775.