417 lines
14 KiB
Python
417 lines
14 KiB
Python
import socket
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import threading
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import telnetlib
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import time
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import queue
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import sys
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import io
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from unittest import TestCase
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from test import support
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HOST = support.HOST
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EOF_sigil = object()
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def server(evt, serv, dataq=None):
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""" Open a tcp server in three steps
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1) set evt to true to let the parent know we are ready
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2) [optional] if is not False, write the list of data from dataq.get()
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to the socket.
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3) set evt to true to let the parent know we're done
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"""
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serv.listen(5)
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evt.set()
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try:
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conn, addr = serv.accept()
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if dataq:
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data = b''
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new_data = dataq.get(True, 0.5)
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dataq.task_done()
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for item in new_data:
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if item == EOF_sigil:
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break
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if type(item) in [int, float]:
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time.sleep(item)
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else:
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data += item
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written = conn.send(data)
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data = data[written:]
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except socket.timeout:
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pass
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finally:
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serv.close()
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evt.set()
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class GeneralTests(TestCase):
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def setUp(self):
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self.evt = threading.Event()
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.settimeout(3)
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self.port = support.bind_port(self.sock)
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self.thread = threading.Thread(target=server, args=(self.evt,self.sock))
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self.thread.start()
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self.evt.wait()
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self.evt.clear()
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time.sleep(.1)
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def tearDown(self):
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self.evt.wait()
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self.thread.join()
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def testBasic(self):
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# connects
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telnet = telnetlib.Telnet(HOST, self.port)
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telnet.sock.close()
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def testTimeoutDefault(self):
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self.assertTrue(socket.getdefaulttimeout() is None)
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socket.setdefaulttimeout(30)
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try:
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telnet = telnetlib.Telnet("localhost", self.port)
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finally:
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socket.setdefaulttimeout(None)
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self.assertEqual(telnet.sock.gettimeout(), 30)
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telnet.sock.close()
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def testTimeoutNone(self):
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# None, having other default
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self.assertTrue(socket.getdefaulttimeout() is None)
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socket.setdefaulttimeout(30)
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try:
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telnet = telnetlib.Telnet(HOST, self.port, timeout=None)
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finally:
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socket.setdefaulttimeout(None)
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self.assertTrue(telnet.sock.gettimeout() is None)
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telnet.sock.close()
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def testTimeoutValue(self):
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telnet = telnetlib.Telnet("localhost", self.port, timeout=30)
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self.assertEqual(telnet.sock.gettimeout(), 30)
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telnet.sock.close()
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def testTimeoutOpen(self):
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telnet = telnetlib.Telnet()
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telnet.open("localhost", self.port, timeout=30)
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self.assertEqual(telnet.sock.gettimeout(), 30)
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telnet.sock.close()
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def _read_setUp(self):
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self.evt = threading.Event()
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self.dataq = queue.Queue()
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.settimeout(3)
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self.port = support.bind_port(self.sock)
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self.thread = threading.Thread(target=server, args=(self.evt,self.sock, self.dataq))
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self.thread.start()
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self.evt.wait()
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self.evt.clear()
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time.sleep(.1)
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def _read_tearDown(self):
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self.evt.wait()
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self.thread.join()
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class ReadTests(TestCase):
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setUp = _read_setUp
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tearDown = _read_tearDown
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# use a similar approach to testing timeouts as test_timeout.py
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# these will never pass 100% but make the fuzz big enough that it is rare
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block_long = 0.6
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block_short = 0.3
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def test_read_until_A(self):
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"""
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read_until(expected, [timeout])
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Read until the expected string has been seen, or a timeout is
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hit (default is no timeout); may block.
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"""
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want = [b'x' * 10, b'match', b'y' * 10, EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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data = telnet.read_until(b'match')
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self.assertEqual(data, b''.join(want[:-2]))
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def test_read_until_B(self):
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# test the timeout - it does NOT raise socket.timeout
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want = [b'hello', self.block_long, b'not seen', EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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data = telnet.read_until(b'not seen', self.block_short)
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self.assertEqual(data, want[0])
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self.assertEqual(telnet.read_all(), b'not seen')
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def test_read_all_A(self):
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"""
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read_all()
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Read all data until EOF; may block.
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"""
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want = [b'x' * 500, b'y' * 500, b'z' * 500, EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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data = telnet.read_all()
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self.assertEqual(data, b''.join(want[:-1]))
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return
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def _test_blocking(self, func):
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self.dataq.put([self.block_long, EOF_sigil])
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self.dataq.join()
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start = time.time()
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data = func()
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self.assertTrue(self.block_short <= time.time() - start)
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def test_read_all_B(self):
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self._test_blocking(telnetlib.Telnet(HOST, self.port).read_all)
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def test_read_all_C(self):
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self.dataq.put([EOF_sigil])
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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telnet.read_all()
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telnet.read_all() # shouldn't raise
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def test_read_some_A(self):
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"""
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read_some()
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Read at least one byte or EOF; may block.
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"""
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# test 'at least one byte'
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want = [b'x' * 500, EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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data = telnet.read_all()
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self.assertTrue(len(data) >= 1)
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def test_read_some_B(self):
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# test EOF
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self.dataq.put([EOF_sigil])
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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self.assertEqual(b'', telnet.read_some())
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def test_read_some_C(self):
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self._test_blocking(telnetlib.Telnet(HOST, self.port).read_some)
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def _test_read_any_eager_A(self, func_name):
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"""
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read_very_eager()
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Read all data available already queued or on the socket,
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without blocking.
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"""
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want = [self.block_long, b'x' * 100, b'y' * 100, EOF_sigil]
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expects = want[1] + want[2]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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func = getattr(telnet, func_name)
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data = b''
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while True:
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try:
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data += func()
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self.assertTrue(expects.startswith(data))
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except EOFError:
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break
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self.assertEqual(expects, data)
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def _test_read_any_eager_B(self, func_name):
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# test EOF
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self.dataq.put([EOF_sigil])
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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time.sleep(self.block_short)
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func = getattr(telnet, func_name)
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self.assertRaises(EOFError, func)
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# read_eager and read_very_eager make the same gaurantees
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# (they behave differently but we only test the gaurantees)
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def test_read_very_eager_A(self):
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self._test_read_any_eager_A('read_very_eager')
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def test_read_very_eager_B(self):
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self._test_read_any_eager_B('read_very_eager')
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def test_read_eager_A(self):
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self._test_read_any_eager_A('read_eager')
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def test_read_eager_B(self):
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self._test_read_any_eager_B('read_eager')
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# NB -- we need to test the IAC block which is mentioned in the docstring
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# but not in the module docs
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def _test_read_any_lazy_B(self, func_name):
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self.dataq.put([EOF_sigil])
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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func = getattr(telnet, func_name)
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telnet.fill_rawq()
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self.assertRaises(EOFError, func)
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def test_read_lazy_A(self):
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want = [b'x' * 100, EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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time.sleep(self.block_short)
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self.assertEqual(b'', telnet.read_lazy())
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data = b''
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while True:
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try:
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read_data = telnet.read_lazy()
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data += read_data
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if not read_data:
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telnet.fill_rawq()
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except EOFError:
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break
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self.assertTrue(want[0].startswith(data))
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self.assertEqual(data, want[0])
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def test_read_lazy_B(self):
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self._test_read_any_lazy_B('read_lazy')
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def test_read_very_lazy_A(self):
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want = [b'x' * 100, EOF_sigil]
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self.dataq.put(want)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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time.sleep(self.block_short)
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self.assertEqual(b'', telnet.read_very_lazy())
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data = b''
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while True:
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try:
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read_data = telnet.read_very_lazy()
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except EOFError:
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break
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data += read_data
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if not read_data:
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telnet.fill_rawq()
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self.assertEqual(b'', telnet.cookedq)
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telnet.process_rawq()
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self.assertTrue(want[0].startswith(data))
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self.assertEqual(data, want[0])
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def test_read_very_lazy_B(self):
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self._test_read_any_lazy_B('read_very_lazy')
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class nego_collector(object):
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def __init__(self, sb_getter=None):
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self.seen = b''
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self.sb_getter = sb_getter
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self.sb_seen = b''
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def do_nego(self, sock, cmd, opt):
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self.seen += cmd + opt
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if cmd == tl.SE and self.sb_getter:
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sb_data = self.sb_getter()
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self.sb_seen += sb_data
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tl = telnetlib
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class TelnetDebuglevel(tl.Telnet):
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''' Telnet-alike that captures messages written to stdout when
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debuglevel > 0
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'''
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_messages = ''
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def msg(self, msg, *args):
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orig_stdout = sys.stdout
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sys.stdout = fake_stdout = io.StringIO()
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tl.Telnet.msg(self, msg, *args)
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self._messages += fake_stdout.getvalue()
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sys.stdout = orig_stdout
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return
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class OptionTests(TestCase):
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setUp = _read_setUp
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tearDown = _read_tearDown
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# RFC 854 commands
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cmds = [tl.AO, tl.AYT, tl.BRK, tl.EC, tl.EL, tl.GA, tl.IP, tl.NOP]
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def _test_command(self, data):
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""" helper for testing IAC + cmd """
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self.setUp()
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self.dataq.put(data)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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nego = nego_collector()
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telnet.set_option_negotiation_callback(nego.do_nego)
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txt = telnet.read_all()
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cmd = nego.seen
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self.assertTrue(len(cmd) > 0) # we expect at least one command
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self.assertTrue(cmd[:1] in self.cmds)
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self.assertEqual(cmd[1:2], tl.NOOPT)
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self.assertEqual(len(b''.join(data[:-1])), len(txt + cmd))
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nego.sb_getter = None # break the nego => telnet cycle
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self.tearDown()
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def test_IAC_commands(self):
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# reset our setup
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self.dataq.put([EOF_sigil])
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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self.tearDown()
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for cmd in self.cmds:
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self._test_command([tl.IAC, cmd, EOF_sigil])
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self._test_command([b'x' * 100, tl.IAC, cmd, b'y'*100, EOF_sigil])
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self._test_command([b'x' * 10, tl.IAC, cmd, b'y'*10, EOF_sigil])
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# all at once
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self._test_command([tl.IAC + cmd for (cmd) in self.cmds] + [EOF_sigil])
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self.assertEqual(b'', telnet.read_sb_data())
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def test_SB_commands(self):
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# RFC 855, subnegotiations portion
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send = [tl.IAC + tl.SB + tl.IAC + tl.SE,
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tl.IAC + tl.SB + tl.IAC + tl.IAC + tl.IAC + tl.SE,
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tl.IAC + tl.SB + tl.IAC + tl.IAC + b'aa' + tl.IAC + tl.SE,
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tl.IAC + tl.SB + b'bb' + tl.IAC + tl.IAC + tl.IAC + tl.SE,
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tl.IAC + tl.SB + b'cc' + tl.IAC + tl.IAC + b'dd' + tl.IAC + tl.SE,
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EOF_sigil,
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]
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self.dataq.put(send)
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telnet = telnetlib.Telnet(HOST, self.port)
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self.dataq.join()
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nego = nego_collector(telnet.read_sb_data)
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telnet.set_option_negotiation_callback(nego.do_nego)
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txt = telnet.read_all()
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self.assertEqual(txt, b'')
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want_sb_data = tl.IAC + tl.IAC + b'aabb' + tl.IAC + b'cc' + tl.IAC + b'dd'
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self.assertEqual(nego.sb_seen, want_sb_data)
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self.assertEqual(b'', telnet.read_sb_data())
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nego.sb_getter = None # break the nego => telnet cycle
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def _test_debuglevel(self, data, expected_msg):
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""" helper for testing debuglevel messages """
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self.setUp()
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self.dataq.put(data)
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telnet = TelnetDebuglevel(HOST, self.port)
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telnet.set_debuglevel(1)
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self.dataq.join()
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txt = telnet.read_all()
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self.assertTrue(expected_msg in telnet._messages,
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msg=(telnet._messages, expected_msg))
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self.tearDown()
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def test_debuglevel(self):
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# test all the various places that self.msg(...) is called
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given_a_expect_b = [
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# Telnet.fill_rawq
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(b'a', ": recv b''\n"),
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# Telnet.process_rawq
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(tl.IAC + bytes([88]), ": IAC 88 not recognized\n"),
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(tl.IAC + tl.DO + bytes([1]), ": IAC DO 1\n"),
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(tl.IAC + tl.DONT + bytes([1]), ": IAC DONT 1\n"),
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(tl.IAC + tl.WILL + bytes([1]), ": IAC WILL 1\n"),
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(tl.IAC + tl.WONT + bytes([1]), ": IAC WONT 1\n"),
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# Telnet.write
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# XXX, untested
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]
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for a, b in given_a_expect_b:
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self._test_debuglevel([a, EOF_sigil], b)
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return
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def test_main(verbose=None):
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support.run_unittest(GeneralTests, ReadTests, OptionTests)
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if __name__ == '__main__':
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test_main()
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