Python telnetlib.Telnet() Examples

def __init__(self, ip, user, password, read_timeout=None):
        import telnetlib
        self.tn = telnetlib.Telnet(ip, timeout=15)
        self.read_timeout = read_timeout
        if b'Login as:' in self.tn.read_until(b'Login as:', timeout=read_timeout):
            self.tn.write(bytes(user, 'ascii') + b"\r\n")

            if b'Password:' in self.tn.read_until(b'Password:', timeout=read_timeout):
                # needed because of internal implementation details of the telnet server
                time.sleep(0.2)
                self.tn.write(bytes(password, 'ascii') + b"\r\n")

                if b'for more information.' in self.tn.read_until(b'Type "help()" for more information.', timeout=read_timeout):
                    # login succesful
                    from collections import deque
                    self.fifo = deque()
                    return

        raise PyboardError('Failed to establish a telnet connection with the board') 

def interactive(self):
        """
        Mimic an interctive session.
        """

        # Get the Telnet prompt
        prompt = self.wait_for_prompt()
        sys.stdout.write("%s" % prompt)

        while True:

            command = sys.stdin.readline().strip()

            # Fake command that ease quitting the interactive session
            if command == "exit":
                break

            self.send_command(command)
            data = self.recv_command()
            sys.stdout.write(data) 

def test_SB_commands(self):
        # RFC 855, subnegotiations portion
        send = [tl.IAC + tl.SB + tl.IAC + tl.SE,
                tl.IAC + tl.SB + tl.IAC + tl.IAC + tl.IAC + tl.SE,
                tl.IAC + tl.SB + tl.IAC + tl.IAC + 'aa' + tl.IAC + tl.SE,
                tl.IAC + tl.SB + 'bb' + tl.IAC + tl.IAC + tl.IAC + tl.SE,
                tl.IAC + tl.SB + 'cc' + tl.IAC + tl.IAC + 'dd' + tl.IAC + tl.SE,
                EOF_sigil,
               ]
        self.dataq.put(send)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        nego = nego_collector(telnet.read_sb_data)
        telnet.set_option_negotiation_callback(nego.do_nego)
        txt = telnet.read_all()
        self.assertEqual(txt, '')
        want_sb_data = tl.IAC + tl.IAC + 'aabb' + tl.IAC + 'cc' + tl.IAC + 'dd'
        self.assertEqual(nego.sb_seen, want_sb_data)
        self.assertEqual('', telnet.read_sb_data())
        nego.sb_getter = None # break the nego => telnet cycle 

def test_telnet(hostname, port):
    # This attempts to test the validity of a controller
    # It returns a tuple (probably not the best way to do this) which is in the format:
    # Initial Connection Test (bool), Version Response Test (bool), Version Response (str)
    try:
        tn = telnetlib.Telnet(host=hostname, port=port, timeout=3)
    except socket.timeout:
        return False, False, None
    except ConnectionRefusedError:
        return False, False, None

    try:
        tn.write("n\r\n")
        version_string = tn.read_until("}",3)
    except:
        return True, False, None
    return True, True, version_string


# The following was used for testing during development 

def test_read_lazy_A(self):
        want = ['x' * 100, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        time.sleep(self.block_short)
        self.assertEqual('', telnet.read_lazy())
        data = ''
        while True:
            try:
                read_data = telnet.read_lazy()
                data += read_data
                if not read_data:
                    telnet.fill_rawq()
            except EOFError:
                break
            self.assertTrue(want[0].startswith(data))
        self.assertEqual(data, want[0]) 

def test_read_very_lazy_A(self):
        want = ['x' * 100, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        time.sleep(self.block_short)
        self.assertEqual('', telnet.read_very_lazy())
        data = ''
        while True:
            try:
                read_data = telnet.read_very_lazy()
            except EOFError:
                break
            data += read_data
            if not read_data:
                telnet.fill_rawq()
                self.assertEqual('', telnet.cookedq)
                telnet.process_rawq()
            self.assertTrue(want[0].startswith(data))
        self.assertEqual(data, want[0]) 

def _test_command(self, data):
        """ helper for testing IAC + cmd """
        self.setUp()
        self.dataq.put(data)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        nego = nego_collector()
        telnet.set_option_negotiation_callback(nego.do_nego)
        txt = telnet.read_all()
        cmd = nego.seen
        self.assertTrue(len(cmd) > 0) # we expect at least one command
        self.assertIn(cmd[0], self.cmds)
        self.assertEqual(cmd[1], tl.NOOPT)
        self.assertEqual(len(''.join(data[:-1])), len(txt + cmd))
        nego.sb_getter = None # break the nego => telnet cycle
        self.tearDown() 

def test_read_very_lazy_A(self):
        want = ['x' * 100, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        time.sleep(self.block_short)
        self.assertEqual('', telnet.read_very_lazy())
        data = ''
        while True:
            try:
                read_data = telnet.read_very_lazy()
            except EOFError:
                break
            data += read_data
            if not read_data:
                telnet.fill_rawq()
                self.assertEqual('', telnet.cookedq)
                telnet.process_rawq()
            self.assertTrue(want[0].startswith(data))
        self.assertEqual(data, want[0]) 

def _test_command(self, data):
        """ helper for testing IAC + cmd """
        self.setUp()
        self.dataq.put(data)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        nego = nego_collector()
        telnet.set_option_negotiation_callback(nego.do_nego)
        txt = telnet.read_all()
        cmd = nego.seen
        self.assertTrue(len(cmd) > 0) # we expect at least one command
        self.assertIn(cmd[0], self.cmds)
        self.assertEqual(cmd[1], tl.NOOPT)
        self.assertEqual(len(''.join(data[:-1])), len(txt + cmd))
        nego.sb_getter = None # break the nego => telnet cycle
        self.tearDown() 

def test_read_lazy_A(self):
        want = ['x' * 100, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        time.sleep(self.block_short)
        self.assertEqual('', telnet.read_lazy())
        data = ''
        while True:
            try:
                read_data = telnet.read_lazy()
                data += read_data
                if not read_data:
                    telnet.fill_rawq()
            except EOFError:
                break
            self.assertTrue(want[0].startswith(data))
        self.assertEqual(data, want[0]) 

def _test_read_any_eager_A(self, func_name):
        """
        read_very_eager()
          Read all data available already queued or on the socket,
          without blocking.
        """
        want = [self.block_long, 'x' * 100, 'y' * 100, EOF_sigil]
        expects = want[1] + want[2]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        func = getattr(telnet, func_name)
        data = ''
        while True:
            try:
                data += func()
                self.assertTrue(expects.startswith(data))
            except EOFError:
                break
        self.assertEqual(expects, data) 

def portScanner(url,dosyaAdi):
    raporIcerik=""
    baslangic=int(raw_input("Start port: "))
    bitis=int(raw_input("Finish port: "))
    for port in range(baslangic, bitis, 1):
        try:
            i=str(port)
            baglanti = telnetlib.Telnet(url, i)
            baglanti.write("\n")
            print "[+]", str(port), " - ", baglanti.read_all().splitlines()[0]
            raporIcerik+="[+]", str(port), " - ", baglanti.read_all().splitlines()[0]+"\n"
            baglanti.close()
        except:
            pass

    rapor = open(dosyaAdi, "a")
    rapor.write(raporIcerik)
    rapor.close() 

def _test_read_any_eager_A(self, func_name):
        """
        read_very_eager()
          Read all data available already queued or on the socket,
          without blocking.
        """
        want = [self.block_long, 'x' * 100, 'y' * 100, EOF_sigil]
        expects = want[1] + want[2]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        func = getattr(telnet, func_name)
        data = ''
        while True:
            try:
                data += func()
                self.assertTrue(expects.startswith(data))
            except EOFError:
                break
        self.assertEqual(expects, data) 

def connectraw(self):
		# Try up to 10 times to connect to LMS
		connection_failed = 0
		self.rawserver = None

		logging.debug(u"Connecting to LMS raw service on {0}:{1}".format(self.server, self.port))
		while True:
			if connection_failed >= 10:
				logging.debug(u"Could not connect to raw LMS service")
				break
			try:
				# Connection to LMS
				self.rawserver = telnetlib.Telnet(self.server, self.port)

				# Subscribe to notification events that should wake up the system to collect data
				self.rawserver.write("subscribe pause,play,mixer,playlist\n".encode('ascii'))
				break
			except IOError:
				self.rawserver = None
				connection_failed += 1
				time.sleep(1)
		if self.rawserver is None:
			raise IOError(u"Could not connect raw to LMS") 

def cmd(self, cmd_str, wait_ret=True):
        if not isinstance(cmd_str, str):
            raise TypeError("Invalid command string", cmd_str)
        if not self.is_open:
            raise attenuator.Error("Telnet connection not open for commands")

        cmd_str.strip(self.tx_cmd_separator)
        self._tn.read_until(_ascii_string(self.prompt), 2)
        self._tn.write(_ascii_string(cmd_str + self.tx_cmd_separator))
        if wait_ret is False:
            return None

        match_idx, match_val, ret_text = self._tn.expect(
            [_ascii_string("\S+" + self.rx_cmd_separator)], 1)

        if match_idx == -1:
            raise attenuator.Error(
                "Telnet command failed to return valid data")

        ret_text = ret_text.decode()
        ret_text = ret_text.strip(self.tx_cmd_separator +
                                  self.rx_cmd_separator + self.prompt)

        return ret_text 

def __init__(self, host):
        self.tlnt = telnetlib.Telnet(host, 23)

        # Announce that we will send strings character per character
        self.write_raw(telnetlib.IAC + telnetlib.WONT + telnetlib.LINEMODE) 

def testTimeoutNone(self):
        # None, having other default
        self.assertTrue(socket.getdefaulttimeout() is None)
        socket.setdefaulttimeout(30)
        try:
            telnet = telnetlib.Telnet(HOST, self.port, timeout=None)
        finally:
            socket.setdefaulttimeout(None)
        self.assertTrue(telnet.sock.gettimeout() is None)
        telnet.sock.close() 

def test_read_until_with_poll(self):
        """Use select.poll() to implement telnet.read_until()."""
        want = ['x' * 10, 'match', 'y' * 10, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        if not telnet._has_poll:
            raise unittest.SkipTest('select.poll() is required')
        telnet._has_poll = True
        self.dataq.join()
        data = telnet.read_until('match')
        self.assertEqual(data, ''.join(want[:-2])) 

def test_read_until_with_select(self):
        """Use select.select() to implement telnet.read_until()."""
        want = ['x' * 10, 'match', 'y' * 10, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        telnet._has_poll = False
        self.dataq.join()
        data = telnet.read_until('match')
        self.assertEqual(data, ''.join(want[:-2])) 

def test_read_all_A(self):
        """
        read_all()
          Read all data until EOF; may block.
        """
        want = ['x' * 500, 'y' * 500, 'z' * 500, EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        data = telnet.read_all()
        self.assertEqual(data, ''.join(want[:-1]))
        return 

def testBasic(self):
        # connects
        telnet = telnetlib.Telnet(HOST, self.port)
        telnet.sock.close() 

def __init__(self, ip, user, password):
        ConBase.__init__(self)

        if sys.version_info < (3, 0):
            self.read = self.__read2
        else:
            self.read = self.__read3

        self.tn = telnetlib.Telnet(ip)

        if user == "":
            self.fifo = deque()
            return

        if b"Login as:" in self.tn.read_until(b"Login as:", timeout=5.0):
            self.tn.write(bytes(user.encode("ascii")) + b"\r\n")

            if b"Password:" in self.tn.read_until(b"Password:", timeout=5.0):

                # needed because of internal implementation details of the telnet server
                time.sleep(0.2)
                self.tn.write(bytes(password.encode("ascii")) + b"\r\n")

                if b"for more information." in self.tn.read_until(
                    b'Type "help()" for more information.', timeout=5.0
                ):
                    self.fifo = deque()
                    return

        raise ConError() 

def test_read_until_B(self):
        # test the timeout - it does NOT raise socket.timeout
        want = ['hello', self.block_long, 'not seen', EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        data = telnet.read_until('not seen', self.block_short)
        self.assertEqual(data, want[0])
        self.assertEqual(telnet.read_all(), 'not seen') 

def testTimeoutOpen(self):
        telnet = telnetlib.Telnet()
        telnet.open(HOST, self.port, timeout=30)
        self.assertEqual(telnet.sock.gettimeout(), 30)
        telnet.sock.close() 

def testTimeoutValue(self):
        telnet = telnetlib.Telnet(HOST, self.port, timeout=30)
        self.assertEqual(telnet.sock.gettimeout(), 30)
        telnet.sock.close() 

def testTimeoutNone(self):
        # None, having other default
        self.assertTrue(socket.getdefaulttimeout() is None)
        socket.setdefaulttimeout(30)
        try:
            telnet = telnetlib.Telnet(HOST, self.port, timeout=None)
        finally:
            socket.setdefaulttimeout(None)
        self.assertTrue(telnet.sock.gettimeout() is None)
        telnet.sock.close() 

def testTimeoutDefault(self):
        self.assertTrue(socket.getdefaulttimeout() is None)
        socket.setdefaulttimeout(30)
        try:
            telnet = telnetlib.Telnet(HOST, self.port)
        finally:
            socket.setdefaulttimeout(None)
        self.assertEqual(telnet.sock.gettimeout(), 30)
        telnet.sock.close() 

def testBasic(self):
        # connects
        telnet = telnetlib.Telnet(HOST, self.port)
        telnet.sock.close() 

def connect(self):

		# Try up to 10 times to connect to REDIS
		self.connection_failed = 0
		self.dataclient = None

		logging.debug(u"Connecting to SPOP service on {0}:{1}".format(self.server, self.port))


		while True:
			if self.connection_failed >= 10:
				logging.debug(u"Could not connect to SPOP")
				break
			try:
				# Connection to MPD
				client = telnetlib.Telnet(self.server, self.port)
				client.read_until("\n")

				self.dataclient = client
				break
			except:
				self.dataclient = None
				self.connection_failed += 1
				time.sleep(1)
		if self.dataclient is None:
			raise IOError(u"Could not connect to SPOP")
		else:
			logging.debug(u"Connected to SPOP service") 

def test_read_until_B(self):
        # test the timeout - it does NOT raise socket.timeout
        want = ['hello', self.block_long, 'not seen', EOF_sigil]
        self.dataq.put(want)
        telnet = telnetlib.Telnet(HOST, self.port)
        self.dataq.join()
        data = telnet.read_until('not seen', self.block_short)
        self.assertEqual(data, want[0])
        self.assertEqual(telnet.read_all(), 'not seen')