def testInterpreterCrash(self):
     # Making sure getnameinfo doesn't crash the interpreter
     try:
         # On some versions, this crashes the interpreter.
         socket.getnameinfo(('x', 0, 0, 0), 0)
     except socket.error:
         pass

 def testInterpreterCrash(self):
     if sys.platform[:4] == 'java': return
     # Making sure getnameinfo doesn't crash the interpreter
     try:
         # On some versions, this crashes the interpreter.
         socket.getnameinfo(('x', 0, 0, 0), 0)
     except socket.error:
         pass

 def testRefCountGetNameInfo(self):
     # Testing reference count for getnameinfo
     if hasattr(sys, "getrefcount"):
         try:
             # On some versions, this loses a reference
             orig = sys.getrefcount(__name__)
             socket.getnameinfo(__name__, 0)
         except TypeError:
             self.assertEqual(sys.getrefcount(__name__), orig, "socket.getnameinfo loses a reference")

 def testRefCountGetNameInfo(self):
     # Testing reference count for getnameinfo
     if hasattr(sys, "getrefcount"):
         try:
             # On some versions, this loses a reference
             orig = sys.getrefcount(__name__)
             socket.getnameinfo(__name__,0)
         except SystemError:
             if sys.getrefcount(__name__) <> orig:
                 self.fail("socket.getnameinfo loses a reference")

    def validate(self, key, client_addr, cert_principals=None, ca=False):
        for entry in self._ca_entries if ca else self._user_entries:
            if entry.key != key:
                continue

            from_patterns = entry.options.get('from')
            if from_patterns is not None:
                client_host, _ = socket.getnameinfo((client_addr, 0),
                                                    socket.NI_NUMERICSERV)
                client_ip = ip_address(client_addr)

                if not all(pattern.matches(client_host, client_addr, client_ip)
                               for pattern in from_patterns):
                    continue

            principal_patterns = entry.options.get('principals')
            if cert_principals is not None and principal_patterns is not None:
                if not all(any(pattern.matches(principal)
                                   for principal in cert_principals)
                               for pattern in principal_patterns):
                    continue

            return entry.options

        return None

    def getpeernameinfo(self):
        """Returns (remote, port, family) tuple

        """
        (addr, port) = socket.getnameinfo(self.socket.getpeername(),
                              socket.NI_NUMERICHOST | socket.NI_NUMERICSERV)
        return (addr, port, self.socket.family)

def canonicalize_dns(inhost, family=socket.AF_UNSPEC):
    "Canonicalize a hostname or numeric IP address."
    if inhost in canonicalization_cache:
        return canonicalization_cache[inhost]
    # Catch garbaged hostnames in corrupted Mode 6 responses
    m = re.match("([:.[\]]|\w)*", inhost)
    if not m:
        raise TypeError
    (hostname, portsuffix) = portsplit(inhost)
    try:
        ai = socket.getaddrinfo(hostname, None, family, 0, 0, socket.AI_CANONNAME)
    except socket.gaierror as e:
        print('getaddrinfo failed: %s' % e, file=sys.stderr)
        raise SystemExit(1)
    (family, socktype, proto, canonname, sockaddr) = ai[0]
    try:
        name = socket.getnameinfo(sockaddr, socket.NI_NAMEREQD)
        result = name[0].lower() + portsuffix
    except socket.gaierror:
        # On OS X, canonname is empty for hosts without rDNS.
        # Fall back to the hostname.
        canonicalized = canonname or hostname
        result = canonicalized.lower() + portsuffix
    canonicalization_cache[inhost] = result
    return result

def _validate_ip_address(family, address):
    """Check if `address` is valid IP address and return it, in a normalized
    form.

    :Parameters:
        - `family`: ``socket.AF_INET`` or ``socket.AF_INET6``
        - `address`: the IP address to validate
    """
    try:
        info = socket.getaddrinfo(address, 0, family, socket.SOCK_STREAM, 0,
                                                        socket.AI_NUMERICHOST)
    except socket.gaierror as err:
        logger.debug("gaierror: {0} for {1!r}".format(err, address))
        raise ValueError("Bad IP address")

    if not info:
        logger.debug("getaddrinfo result empty")
        raise ValueError("Bad IP address")
    addr = info[0][4]
    logger.debug(" got address: {0!r}".format(addr))

    try:
        return socket.getnameinfo(addr, socket.NI_NUMERICHOST)[0]
    except socket.gaierror as err:
        logger.debug("gaierror: {0} for {1!r}".format(err, addr))
        raise ValueError("Bad IP address")

    def match_options(self, client_addr, cert_principals, cert_subject=None):
        """Match "from", "principals" and "subject" options in entry"""

        from_patterns = self.options.get('from')

        if from_patterns:
            client_host, _ = socket.getnameinfo((client_addr, 0),
                                                socket.NI_NUMERICSERV)
            client_ip = ip_address(client_addr)

            if not all(pattern.matches(client_host, client_addr, client_ip)
                       for pattern in from_patterns):
                return False

        principal_patterns = self.options.get('principals')

        if cert_principals is not None and principal_patterns is not None:
            if not all(any(pattern.matches(principal)
                           for principal in cert_principals)
                       for pattern in principal_patterns):
                return False

        subject_patterns = self.options.get('subject')

        if cert_subject is not None and subject_patterns is not None:
            if not all(pattern.matches(cert_subject)
                       for pattern in subject_patterns):
                return False

        return True

    def __init__(self, parent, server):
        """
        Initialize a HeyU client application.

        :param parent: The parent of the ``HubApplication``.  This
                       will be an instance of ``tendril.Tendril``.
        :param server: The underlying HeyU server instance.  The
                       server keeps track of subscriptions and
                       forwards notifications to the subscribers.
        """

        # Initialize the application
        super(HubApplication, self).__init__(parent)

        # Save the server link
        self.server = server

        # Are we a persistent connection?
        self.persist = False

        # Set up the desired framer
        parent.framers = tendril.COBSFramer(True)

        # Determine the hostname of the client
        try:
            if parent.remote_addr[0] in ('127.0.0.1', '::1'):
                self.hostname = socket.getfqdn()
            else:
                self.hostname, _port = socket.getnameinfo(parent.remote_addr,
                                                          0)
        except Exception:
            # Just use the bare address
            self.hostname = parent.remote_addr[0]

 def update(self, s):
     self.win.erase()
     self.addstr(1, 0, "CLIENT           PORT S I   QUEUED    RECVD     SENT", curses.A_REVERSE)
     self.sessions[s.server_id] = s.sessions
     items = []
     for l in self.sessions:
         items.extend(l)
     items.sort(key=lambda x: int(x.queued), reverse=True)
     for i, session in enumerate(items):
         try:
             # ugh, need to handle if slow - thread for async resolver?
             if options.names:
                 session.host = socket.getnameinfo((session.host, int(session.port)), 0)[0]
             self.addstr(
                 i + 2,
                 0,
                 "%-15s %5s %1s %1s %8s %8s %8s"
                 % (
                     session.host[:15],
                     session.port,
                     session.server_id,
                     session.interest_ops,
                     session.queued,
                     session.recved,
                     session.sent,
                 ),
             )
         except:
             break

    def listen(self):
        if __debug__:
            self.err_log.debug('Entering main loop.')
        while True:
            try:
                sock, addr = self.listener.accept()

                if self.secure:
                    sock = self.wrap_socket(sock)

                self.active_queue.put((
                    (sock, socket.getnameinfo(addr, socket.NI_NUMERICHOST | socket.NI_NUMERICSERV)),
                    self.interface[1],
                    self.secure
                ))

            except socket.timeout:
                # socket.timeout will be raised every THREAD_STOP_CHECK_INTERVAL
                # seconds.  When that happens, we check if it's time to die.

                if not self.ready:
                    if __debug__:
                        self.err_log.debug('Listener exiting.')
                    try:
                        self.listener.shutdown(socket.SHUT_RDWR)
                    except socket.error:
                        self.err_log.warning('Socket shutdown() failed')
                    self.listener.close()
                    return
                else:
                    continue
            except:
                self.err_log.error(str(traceback.format_exc()))

 def setup(self):
     # some hack for mapped IPv4-to-IPv6 addresses
     ip = IPy.IP(self.client_address[0])
     if ip.iptype() == "IPV4MAP":
         self.client_address = (ip._getIPv4Map().strNormal(), self.client_address[1])
     client_name = socket.getnameinfo(self.client_address, socket.NI_NUMERICSERV)
     self.logger = logging.getLogger("ffcontroller.control-connection")
     threading.current_thread().setName(client_name[0])
     self.start_time = datetime.datetime.now()
     self.last_command_time = self.start_time
     self.commands_sent = 0
     self.queue = MixedQueue(global_queue)
     # start dedicated server for us
     self.proxy_server = start_server(
         ThreadedHTTPServer,
         HTTPProxyRequestHandler,
         options.proxy_address,
         proxy_port_range.popleft(),
         ServerConnectionPool(self.queue),
     )
     # register self for statistics
     control_connections.append(self)
     self.logger.debug("started")
     socketserver.StreamRequestHandler.setup(self)
     self.connection.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)

 def connect(self):
     # create listening socket for back connection
     backserv = socket.socket()
     backserv.settimeout(options.backconn_timeout)
     # bind to some unused port
     backserv.bind((options.backconn_address, 0))
     selfaddr = backserv.getsockname()
     selfnetloc = "{0}:{1}".format(*selfaddr)
     self.logger.debug("awaiting back connection on {0}".format(selfnetloc))
     # start listening
     backserv.listen(1)
     for i in range(options.retry_count):
         # put both locations to queue
         self.queue.put((selfnetloc, self.netloc))
         # wait for connection
         try:
             self.sock, peeraddr = backserv.accept()
             self.sock.settimeout(options.transport_timeout)
             break
         except socket.timeout:
             self.logger.info("timeout while accepting back connection. resending request.")
     else:
         raise socket.timeout("timeout while trying to establish back connection")
     self.logger.debug(
         "accepted back connection from {0}:{1}".format(*socket.getnameinfo(peeraddr, socket.NI_NUMERICSERV))
     )
     # close server socket
     backserv.close()

def getHostnameFqdn():
    """
    Wrapper around getfqdn.

    Returns the fully qualified hostname, None if not found.
    """

    try:
        sHostname = socket.getfqdn();
    except:
        return None;

    if '.' in sHostname or sHostname.startswith('localhost'):
        return sHostname;

    #
    # Somewhat misconfigured system, needs expensive approach to guessing FQDN.
    # Get address information on the hostname and do a reverse lookup from that.
    #
    try:
        aAddressInfo = socket.getaddrinfo(sHostname, None);
    except:
        return sHostname;

    for aAI in aAddressInfo:
        try:    sName, _ = socket.getnameinfo(aAI[4], 0);
        except: continue;
        if '.' in sName and not set(sName).issubset(set('0123456789.')) and not sName.startswith('localhost'):
            return sName;

    return sHostname;

def test_getnameinfo():
    host = "127.0.0.1"
    port = 25
    info = socket.getnameinfo((host, port), 0)
    w_l = space.appexec([w_socket, space.wrap(host), space.wrap(port)],
                        "(_socket, host, port): return _socket.getnameinfo((host, port), 0)")
    assert space.unwrap(w_l) == info

def mac_to_ipv6(prefix, mac):
    mp = mac.split(":")
    inv_a = int(mp[0], 16) ^ 2
    addr = "{0}{1:02x}{2:02x}:{3:02x}ff:fe{4:02x}:{5:02x}{6:02x}" \
           .format(prefix, inv_a, int(mp[1], 16), int(mp[2], 16),
                   int(mp[3], 16), int(mp[4], 16), int(mp[5], 16))
    name = socket.getnameinfo((addr, 22), socket.NI_NUMERICSERV | socket.NI_NUMERICHOST)
    return name[0]

def mac_to_ipv6(prefix, mac):
    mp = mac.split(":")
    inv_a = int(mp[0], 16) ^ 2
    addr = "%s%02x%02x:%02xff:fe%02x:%02x%02x" % \
        (prefix, inv_a, int(mp[1], 16), int(mp[2], 16),
         int(mp[3], 16), int(mp[4], 16), int(mp[5], 16))
    name = socket.getnameinfo((addr, 22), socket.NI_NUMERICSERV|socket.NI_NUMERICHOST)
    return name[0]

    def find_jobs(self, constraint = 'True', attributes = []):
        """
        Return ClassAds for jobs matching the constraints.
        """

        if len(self._schedds) == 0:
            LOG.info('Finding schedds reporting to collector %s', self._collector_name)
    
            attempt = 0
            while True:
                try:
                    schedd_ads = self._collector.query(htcondor.AdTypes.Schedd, self._schedd_constraint, ['MyAddress', 'ScheddIpAddr'])
                    break
                except IOError:
                    attempt += 1
                    LOG.warning('Collector query failed: %s', str(sys.exc_info()[0]))
                    if attempt == 10:
                        LOG.error('Communication with the collector failed. We have no information of the condor pool.')
                        return
    
            LOG.debug('%d schedd ads', len(schedd_ads))
    
            for ad in schedd_ads:
                LOG.debug(ad)
                schedd = htcondor.Schedd(ad)
                matches = re.match('<([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+):([0-9]+)', ad['MyAddress'])
                # schedd does not have an ipaddr attribute natively, but we can assign it
                schedd.ipaddr = matches.group(1)
                schedd.host = socket.getnameinfo((matches.group(1), int(matches.group(2))), socket.AF_INET)[0] # socket.getnameinfo(*, AF_INET) returns a (host, port) 2-tuple
    
                self._schedds.append(schedd)
    
            LOG.debug('Found schedds: %s', ', '.join(['%s (%s)' % (schedd.host, schedd.ipaddr) for schedd in self._schedds]))

        LOG.debug('Querying HTCondor with constraint "%s" for attributes %s', constraint, str(attributes))

        classads = []

        for schedd in self._schedds:
            attempt = 0
            while True:
                try:
                    ads = schedd.query(constraint, attributes)
                    break
                except IOError:
                    attempt += 1
                    LOG.warning('IOError in communicating with schedd %s. Trying again.', schedd.ipaddr)
                    if attempt == 10:
                        LOG.error('Schedd %s did not respond.', schedd.ipaddr)
                        ads = []
                        break
                
            classads.extend(ads)

        LOG.info('HTCondor returned %d classads', len(classads))

        return classads

def test_getnameinfo():
    '''
    Tests socket.getnameinfo()
    '''
    #sanity
    socket.getnameinfo(("127.0.0.1", 80), 8)
    socket.getnameinfo(("127.0.0.1", 80), 9)
        
    host, service = socket.getnameinfo( ("127.0.0.1", 80), 8)
    AreEqual(service, '80')
        
    if is_cli:
        AssertError(NotImplementedError, socket.getnameinfo, ("127.0.0.1", 80), 0)
    #IP gives a TypeError
    #AssertError(SystemError, socket.getnameinfo, ("127.0.0.1"), 8)
    #AssertError(SystemError, socket.getnameinfo, (321), 8)
    AssertError(TypeError, socket.getnameinfo, ("127.0.0.1"), '0')
    AssertError(TypeError, socket.getnameinfo, ("127.0.0.1", 80, 0, 0, 0), 8)
    AssertError(socket.gaierror, socket.getnameinfo, ('no such host will ever exist', 80), 8)