text: # Wrapper module for _socket, providing some additional facilities
  # implemented in Python.
  
  """\
  This module provides socket operations and some related functions.
  On Unix, it supports IP (Internet Protocol) and Unix domain sockets.
  On other systems, it only supports IP. Functions specific for a
  socket are available as methods of the socket object.
  
  Functions:
  
  socket() -- create a new socket object
  socketpair() -- create a pair of new socket objects [*]
  fromfd() -- create a socket object from an open file descriptor [*]
  fromshare() -- create a socket object from data received from socket.share() [*]
  gethostname() -- return the current hostname
  gethostbyname() -- map a hostname to its IP number
  gethostbyaddr() -- map an IP number or hostname to DNS info
  getservbyname() -- map a service name and a protocol name to a port number
  getprotobyname() -- map a protocol name (e.g. 'tcp') to a number
  ntohs(), ntohl() -- convert 16, 32 bit int from network to host byte order
  htons(), htonl() -- convert 16, 32 bit int from host to network byte order
  inet_aton() -- convert IP addr string (123.45.67.89) to 32-bit packed format
  inet_ntoa() -- convert 32-bit packed format IP to string (123.45.67.89)
  socket.getdefaulttimeout() -- get the default timeout value
  socket.setdefaulttimeout() -- set the default timeout value
  create_connection() -- connects to an address, with an optional timeout and
                         optional source address.
  
   [*] not available on all platforms!
  
  Special objects:
  
  SocketType -- type object for socket objects
  error -- exception raised for I/O errors
  has_ipv6 -- boolean value indicating if IPv6 is supported
  
  Integer constants:
  
  AF_INET, AF_UNIX -- socket domains (first argument to socket() call)
  SOCK_STREAM, SOCK_DGRAM, SOCK_RAW -- socket types (second argument)
  
  Many other constants may be defined; these may be used in calls to
  the setsockopt() and getsockopt() methods.
  """
  
  from __future__ import unicode_literals
  from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  from future.builtins import super
  
  import _socket
  from _socket import *
  
  import os, sys, io
  
  try:
      import errno
  except ImportError:
      errno = None
  EBADF = getattr(errno, "EBADF", 9)
  EAGAIN = getattr(errno, "EAGAIN", 11)
  EWOULDBLOCK = getattr(errno, "EWOULDBLOCK", 11)
  
  __all__ = ["getfqdn", "create_connection"]
  __all__.extend(os._get_exports_list(_socket))
  
  
  _realsocket = socket
  
  # WSA error codes
  if sys.platform.lower().startswith("win"):
      errorTab = {}
      errorTab[10004] = "The operation was interrupted."
      errorTab[10009] = "A bad file handle was passed."
      errorTab[10013] = "Permission denied."
      errorTab[10014] = "A fault occurred on the network??"  # WSAEFAULT
      errorTab[10022] = "An invalid operation was attempted."
      errorTab[10035] = "The socket operation would block"
      errorTab[10036] = "A blocking operation is already in progress."
      errorTab[10048] = "The network address is in use."
      errorTab[10054] = "The connection has been reset."
      errorTab[10058] = "The network has been shut down."
      errorTab[10060] = "The operation timed out."
      errorTab[10061] = "Connection refused."
      errorTab[10063] = "The name is too long."
      errorTab[10064] = "The host is down."
      errorTab[10065] = "The host is unreachable."
      __all__.append("errorTab")
  
  
  class socket(_socket.socket):
  
      """A subclass of _socket.socket adding the makefile() method."""
  
      __slots__ = ["__weakref__", "_io_refs", "_closed"]
  
      def __init__(self, family=AF_INET, type=SOCK_STREAM, proto=0, fileno=None):
          if fileno is None:
              _socket.socket.__init__(self, family, type, proto)
          else:
              _socket.socket.__init__(self, family, type, proto, fileno)
          self._io_refs = 0
          self._closed = False
  
      def __enter__(self):
          return self
  
      def __exit__(self, *args):
          if not self._closed:
              self.close()
  
      def __repr__(self):
          """Wrap __repr__() to reveal the real class name."""
          s = _socket.socket.__repr__(self)
          if s.startswith("<socket object"):
              s = "<%s.%s%s%s" % (
                  self.__class__.__module__,
                  self.__class__.__name__,
                  getattr(self, "_closed", False) and " [closed] " or "",
                  s[7:],
              )
          return s
  
      def __getstate__(self):
          raise TypeError("Cannot serialize socket object")
  
      def dup(self):
          """dup() -> socket object
  
          Return a new socket object connected to the same system resource.
          """
          fd = dup(self.fileno())
          sock = self.__class__(self.family, self.type, self.proto, fileno=fd)
          sock.settimeout(self.gettimeout())
          return sock
  
      def accept(self):
          """accept() -> (socket object, address info)
  
          Wait for an incoming connection.  Return a new socket
          representing the connection, and the address of the client.
          For IP sockets, the address info is a pair (hostaddr, port).
          """
          fd, addr = self._accept()
          sock = socket(self.family, self.type, self.proto, fileno=fd)
          # Issue #7995: if no default timeout is set and the listening
          # socket had a (non-zero) timeout, force the new socket in blocking
          # mode to override platform-specific socket flags inheritance.
          if getdefaulttimeout() is None and self.gettimeout():
              sock.setblocking(True)
          return sock, addr
  
      def makefile(self, mode="r", buffering=None, **_3to2kwargs):
          """makefile(...) -> an I/O stream connected to the socket
  
          The arguments are as for io.open() after the filename,
          except the only mode characters supported are 'r', 'w' and 'b'.
          The semantics are similar too.  (XXX refactor to share code?)
          """
          if "newline" in _3to2kwargs:
              newline = _3to2kwargs["newline"]
              del _3to2kwargs["newline"]
          else:
              newline = None
          if "errors" in _3to2kwargs:
              errors = _3to2kwargs["errors"]
              del _3to2kwargs["errors"]
          else:
              errors = None
          if "encoding" in _3to2kwargs:
              encoding = _3to2kwargs["encoding"]
              del _3to2kwargs["encoding"]
          else:
              encoding = None
          for c in mode:
              if c not in ("r", "w", "b"):
                  raise ValueError("invalid mode %r (only r, w, b allowed)")
          writing = "w" in mode
          reading = "r" in mode or not writing
          assert reading or writing
          binary = "b" in mode
          rawmode = ""
          if reading:
              rawmode += "r"
          if writing:
              rawmode += "w"
          raw = SocketIO(self, rawmode)
          self._io_refs += 1
          if buffering is None:
              buffering = -1
          if buffering < 0:
              buffering = io.DEFAULT_BUFFER_SIZE
          if buffering == 0:
              if not binary:
                  raise ValueError("unbuffered streams must be binary")
              return raw
          if reading and writing:
              buffer = io.BufferedRWPair(raw, raw, buffering)
          elif reading:
              buffer = io.BufferedReader(raw, buffering)
          else:
              assert writing
              buffer = io.BufferedWriter(raw, buffering)
          if binary:
              return buffer
          text = io.TextIOWrapper(buffer, encoding, errors, newline)
          text.mode = mode
          return text
  
      def _decref_socketios(self):
          if self._io_refs > 0:
              self._io_refs -= 1
          if self._closed:
              self.close()
  
      def _real_close(self, _ss=_socket.socket):
          # This function should not reference any globals. See issue #808164.
          _ss.close(self)
  
      def close(self):
          # This function should not reference any globals. See issue #808164.
          self._closed = True
          if self._io_refs <= 0:
              self._real_close()
  
      def detach(self):
          """detach() -> file descriptor
  
          Close the socket object without closing the underlying file descriptor.
          The object cannot be used after this call, but the file descriptor
          can be reused for other purposes.  The file descriptor is returned.
          """
          self._closed = True
          return super().detach()
  
  
  def fromfd(fd, family, type, proto=0):
      """ fromfd(fd, family, type[, proto]) -> socket object
  
      Create a socket object from a duplicate of the given file
      descriptor.  The remaining arguments are the same as for socket().
      """
      nfd = dup(fd)
      return socket(family, type, proto, nfd)
  
  
  if hasattr(_socket.socket, "share"):
  
      def fromshare(info):
          """ fromshare(info) -> socket object
  
          Create a socket object from a the bytes object returned by
          socket.share(pid).
          """
          return socket(0, 0, 0, info)
  
  
  if hasattr(_socket, "socketpair"):
  
      def socketpair(family=None, type=SOCK_STREAM, proto=0):
          """socketpair([family[, type[, proto]]]) -> (socket object, socket object)
  
          Create a pair of socket objects from the sockets returned by the platform
          socketpair() function.
          The arguments are the same as for socket() except the default family is
          AF_UNIX if defined on the platform; otherwise, the default is AF_INET.
          """
          if family is None:
              try:
                  family = AF_UNIX
              except NameError:
                  family = AF_INET
          a, b = _socket.socketpair(family, type, proto)
          a = socket(family, type, proto, a.detach())
          b = socket(family, type, proto, b.detach())
          return a, b
  
  
  _blocking_errnos = set([EAGAIN, EWOULDBLOCK])
  
  
  class SocketIO(io.RawIOBase):
  
      """Raw I/O implementation for stream sockets.
  
      This class supports the makefile() method on sockets.  It provides
      the raw I/O interface on top of a socket object.
      """
  
      # One might wonder why not let FileIO do the job instead.  There are two
      # main reasons why FileIO is not adapted:
      # - it wouldn't work under Windows (where you can't used read() and
      #   write() on a socket handle)
      # - it wouldn't work with socket timeouts (FileIO would ignore the
      #   timeout and consider the socket non-blocking)
  
      # XXX More docs
  
      def __init__(self, sock, mode):
          if mode not in ("r", "w", "rw", "rb", "wb", "rwb"):
              raise ValueError("invalid mode: %r" % mode)
          io.RawIOBase.__init__(self)
          self._sock = sock
          if "b" not in mode:
              mode += "b"
          self._mode = mode
          self._reading = "r" in mode
          self._writing = "w" in mode
          self._timeout_occurred = False
  
      def readinto(self, b):
          """Read up to len(b) bytes into the writable buffer *b* and return
          the number of bytes read.  If the socket is non-blocking and no bytes
          are available, None is returned.
  
          If *b* is non-empty, a 0 return value indicates that the connection
          was shutdown at the other end.
          """
          self._checkClosed()
          self._checkReadable()
          if self._timeout_occurred:
              raise IOError("cannot read from timed out object")
          while True:
              try:
                  return self._sock.recv_into(b)
              except timeout:
                  self._timeout_occurred = True
                  raise
              # except InterruptedError:
              #     continue
              except error as e:
                  if e.args[0] in _blocking_errnos:
                      return None
                  raise
  
      def write(self, b):
          """Write the given bytes or bytearray object *b* to the socket
          and return the number of bytes written.  This can be less than
          len(b) if not all data could be written.  If the socket is
          non-blocking and no bytes could be written None is returned.
          """
          self._checkClosed()
          self._checkWritable()
          try:
              return self._sock.send(b)
          except error as e:
              # XXX what about EINTR?
              if e.args[0] in _blocking_errnos:
                  return None
              raise
  
      def readable(self):
          """True if the SocketIO is open for reading.
          """
          if self.closed:
              raise ValueError("I/O operation on closed socket.")
          return self._reading
  
      def writable(self):
          """True if the SocketIO is open for writing.
          """
          if self.closed:
              raise ValueError("I/O operation on closed socket.")
          return self._writing
  
      def seekable(self):
          """True if the SocketIO is open for seeking.
          """
          if self.closed:
              raise ValueError("I/O operation on closed socket.")
          return super().seekable()
  
      def fileno(self):
          """Return the file descriptor of the underlying socket.
          """
          self._checkClosed()
          return self._sock.fileno()
  
      @property
      def name(self):
          if not self.closed:
              return self.fileno()
          else:
              return -1
  
      @property
      def mode(self):
          return self._mode
  
      def close(self):
          """Close the SocketIO object.  This doesn't close the underlying
          socket, except if all references to it have disappeared.
          """
          if self.closed:
              return
          io.RawIOBase.close(self)
          self._sock._decref_socketios()
          self._sock = None
  
  
  def getfqdn(name=""):
      """Get fully qualified domain name from name.
  
      An empty argument is interpreted as meaning the local host.
  
      First the hostname returned by gethostbyaddr() is checked, then
      possibly existing aliases. In case no FQDN is available, hostname
      from gethostname() is returned.
      """
      name = name.strip()
      if not name or name == "0.0.0.0":
          name = gethostname()
      try:
          hostname, aliases, ipaddrs = gethostbyaddr(name)
      except error:
          pass
      else:
          aliases.insert(0, hostname)
          for name in aliases:
              if "." in name:
                  break
          else:
              name = hostname
      return name
  
  
  # Re-use the same sentinel as in the Python stdlib socket module:
  from socket import _GLOBAL_DEFAULT_TIMEOUT
  
  # Was: _GLOBAL_DEFAULT_TIMEOUT = object()
  
  
  def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT, source_address=None):
      """Connect to *address* and return the socket object.
  
      Convenience function.  Connect to *address* (a 2-tuple ``(host,
      port)``) and return the socket object.  Passing the optional
      *timeout* parameter will set the timeout on the socket instance
      before attempting to connect.  If no *timeout* is supplied, the
      global default timeout setting returned by :func:`getdefaulttimeout`
      is used.  If *source_address* is set it must be a tuple of (host, port)
      for the socket to bind as a source address before making the connection.
      An host of '' or port 0 tells the OS to use the default.
      """
  
      host, port = address
      err = None
      for res in getaddrinfo(host, port, 0, SOCK_STREAM):
          af, socktype, proto, canonname, sa = res
          sock = None
          try:
              sock = socket(af, socktype, proto)
              if timeout is not _GLOBAL_DEFAULT_TIMEOUT:
                  sock.settimeout(timeout)
              if source_address:
                  sock.bind(source_address)
              sock.connect(sa)
              return sock
  
          except error as _:
              err = _
              if sock is not None:
                  sock.close()
  
      if err is not None:
          raise err
      else:
          raise error("getaddrinfo returns an empty list")
  