Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_timeout.py @ 84007:dbfbdf2b5c19 3.3

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Fix #17967: For ftp urls CWD to target instead of hopping to each directory towards target. This fixes a bug where target is accessible, but parent directories are restricted.
author Senthil Kumaran <senthil@uthcode.com>
date Sat, 01 Jun 2013 08:27:06 -0700
parents 9c22222af1f9
children 5880c7d33e13 7d69d04522e3
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1 """Unit tests for socket timeout feature."""
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2
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3 import unittest
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4 from test import support
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5
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6 # This requires the 'network' resource as given on the regrtest command line.
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7 skip_expected = not support.is_resource_enabled('network')
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8
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9 import time
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10 import errno
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11 import socket
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12
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13
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14 class CreationTestCase(unittest.TestCase):
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15 """Test case for socket.gettimeout() and socket.settimeout()"""
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16
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17 def setUp(self):
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18 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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19
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20 def tearDown(self):
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21 self.sock.close()
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22
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23 def testObjectCreation(self):
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24 # Test Socket creation
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25 self.assertEqual(self.sock.gettimeout(), None,
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26 "timeout not disabled by default")
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27
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28 def testFloatReturnValue(self):
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29 # Test return value of gettimeout()
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30 self.sock.settimeout(7.345)
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31 self.assertEqual(self.sock.gettimeout(), 7.345)
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32
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33 self.sock.settimeout(3)
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34 self.assertEqual(self.sock.gettimeout(), 3)
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35
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36 self.sock.settimeout(None)
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37 self.assertEqual(self.sock.gettimeout(), None)
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38
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39 def testReturnType(self):
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40 # Test return type of gettimeout()
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41 self.sock.settimeout(1)
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42 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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43
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44 self.sock.settimeout(3.9)
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45 self.assertEqual(type(self.sock.gettimeout()), type(1.0))
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47 def testTypeCheck(self):
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48 # Test type checking by settimeout()
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49 self.sock.settimeout(0)
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50 self.sock.settimeout(0)
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51 self.sock.settimeout(0.0)
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52 self.sock.settimeout(None)
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53 self.assertRaises(TypeError, self.sock.settimeout, "")
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54 self.assertRaises(TypeError, self.sock.settimeout, "")
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55 self.assertRaises(TypeError, self.sock.settimeout, ())
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56 self.assertRaises(TypeError, self.sock.settimeout, [])
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57 self.assertRaises(TypeError, self.sock.settimeout, {})
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58 self.assertRaises(TypeError, self.sock.settimeout, 0j)
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59
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60 def testRangeCheck(self):
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61 # Test range checking by settimeout()
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62 self.assertRaises(ValueError, self.sock.settimeout, -1)
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63 self.assertRaises(ValueError, self.sock.settimeout, -1)
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64 self.assertRaises(ValueError, self.sock.settimeout, -1.0)
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65
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66 def testTimeoutThenBlocking(self):
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67 # Test settimeout() followed by setblocking()
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68 self.sock.settimeout(10)
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69 self.sock.setblocking(1)
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70 self.assertEqual(self.sock.gettimeout(), None)
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71 self.sock.setblocking(0)
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72 self.assertEqual(self.sock.gettimeout(), 0.0)
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73
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74 self.sock.settimeout(10)
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75 self.sock.setblocking(0)
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76 self.assertEqual(self.sock.gettimeout(), 0.0)
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77 self.sock.setblocking(1)
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78 self.assertEqual(self.sock.gettimeout(), None)
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79
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80 def testBlockingThenTimeout(self):
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81 # Test setblocking() followed by settimeout()
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82 self.sock.setblocking(0)
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83 self.sock.settimeout(1)
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84 self.assertEqual(self.sock.gettimeout(), 1)
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85
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86 self.sock.setblocking(1)
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87 self.sock.settimeout(1)
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88 self.assertEqual(self.sock.gettimeout(), 1)
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89
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90
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91 class TimeoutTestCase(unittest.TestCase):
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92 # There are a number of tests here trying to make sure that an operation
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93 # doesn't take too much longer than expected. But competing machine
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94 # activity makes it inevitable that such tests will fail at times.
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95 # When fuzz was at 1.0, I (tim) routinely saw bogus failures on Win2K
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96 # and Win98SE. Boosting it to 2.0 helped a lot, but isn't a real
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97 # solution.
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98 fuzz = 2.0
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99
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100 localhost = '127.0.0.1'
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101
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102 def setUp(self):
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103 raise NotImplementedError()
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104
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105 tearDown = setUp
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106
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107 def _sock_operation(self, count, timeout, method, *args):
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108 """
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109 Test the specified socket method.
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110
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111 The method is run at most `count` times and must raise a socket.timeout
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112 within `timeout` + self.fuzz seconds.
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113 """
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114 self.sock.settimeout(timeout)
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115 method = getattr(self.sock, method)
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116 for i in range(count):
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117 t1 = time.time()
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118 try:
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119 method(*args)
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120 except socket.timeout as e:
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121 delta = time.time() - t1
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122 break
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123 else:
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124 self.fail('socket.timeout was not raised')
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125 # These checks should account for timing unprecision
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126 self.assertLess(delta, timeout + self.fuzz)
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127 self.assertGreater(delta, timeout - 1.0)
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128
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129
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130 class TCPTimeoutTestCase(TimeoutTestCase):
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131 """TCP test case for socket.socket() timeout functions"""
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132
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133 def setUp(self):
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134 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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135 self.addr_remote = ('www.python.org.', 80)
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136
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137 def tearDown(self):
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138 self.sock.close()
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139
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140 def testConnectTimeout(self):
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141 # Testing connect timeout is tricky: we need to have IP connectivity
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142 # to a host that silently drops our packets. We can't simulate this
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143 # from Python because it's a function of the underlying TCP/IP stack.
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144 # So, the following Snakebite host has been defined:
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145 blackhole = ('blackhole.snakebite.net', 56666)
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146
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147 # Blackhole has been configured to silently drop any incoming packets.
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148 # No RSTs (for TCP) or ICMP UNREACH (for UDP/ICMP) will be sent back
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149 # to hosts that attempt to connect to this address: which is exactly
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150 # what we need to confidently test connect timeout.
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151
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152 # However, we want to prevent false positives. It's not unreasonable
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153 # to expect certain hosts may not be able to reach the blackhole, due
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154 # to firewalling or general network configuration. In order to improve
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155 # our confidence in testing the blackhole, a corresponding 'whitehole'
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156 # has also been set up using one port higher:
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157 whitehole = ('whitehole.snakebite.net', 56667)
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158
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159 # This address has been configured to immediately drop any incoming
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160 # packets as well, but it does it respectfully with regards to the
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161 # incoming protocol. RSTs are sent for TCP packets, and ICMP UNREACH
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162 # is sent for UDP/ICMP packets. This means our attempts to connect to
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163 # it should be met immediately with ECONNREFUSED. The test case has
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164 # been structured around this premise: if we get an ECONNREFUSED from
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165 # the whitehole, we proceed with testing connect timeout against the
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166 # blackhole. If we don't, we skip the test (with a message about not
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167 # getting the required RST from the whitehole within the required
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168 # timeframe).
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169
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170 # For the records, the whitehole/blackhole configuration has been set
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171 # up using the 'pf' firewall (available on BSDs), using the following:
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172 #
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173 # ext_if="bge0"
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174 #
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175 # blackhole_ip="35.8.247.6"
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176 # whitehole_ip="35.8.247.6"
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177 # blackhole_port="56666"
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178 # whitehole_port="56667"
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179 #
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180 # block return in log quick on $ext_if proto { tcp udp } \
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181 # from any to $whitehole_ip port $whitehole_port
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182 # block drop in log quick on $ext_if proto { tcp udp } \
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183 # from any to $blackhole_ip port $blackhole_port
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184 #
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185
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186 skip = True
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187 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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188 # Use a timeout of 3 seconds. Why 3? Because it's more than 1, and
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189 # less than 5. i.e. no particular reason. Feel free to tweak it if
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190 # you feel a different value would be more appropriate.
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191 timeout = 3
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192 sock.settimeout(timeout)
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193 try:
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194 sock.connect((whitehole))
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195 except socket.timeout:
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196 pass
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197 except IOError as err:
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198 if err.errno == errno.ECONNREFUSED:
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199 skip = False
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200 finally:
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201 sock.close()
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202 del sock
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203
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204 if skip:
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205 self.skipTest(
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206 "We didn't receive a connection reset (RST) packet from "
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207 "{}:{} within {} seconds, so we're unable to test connect "
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208 "timeout against the corresponding {}:{} (which is "
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209 "configured to silently drop packets)."
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210 .format(
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211 whitehole[0],
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212 whitehole[1],
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213 timeout,
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214 blackhole[0],
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215 blackhole[1],
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216 )
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217 )
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218
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219 # All that hard work just to test if connect times out in 0.001s ;-)
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220 self.addr_remote = blackhole
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221 with support.transient_internet(self.addr_remote[0]):
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222 self._sock_operation(1, 0.001, 'connect', self.addr_remote)
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223
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224 def testRecvTimeout(self):
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225 # Test recv() timeout
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226 with support.transient_internet(self.addr_remote[0]):
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227 self.sock.connect(self.addr_remote)
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228 self._sock_operation(1, 1.5, 'recv', 1024)
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229
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230 def testAcceptTimeout(self):
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231 # Test accept() timeout
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232 support.bind_port(self.sock, self.localhost)
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233 self.sock.listen(5)
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234 self._sock_operation(1, 1.5, 'accept')
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235
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236 def testSend(self):
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237 # Test send() timeout
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238 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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239 support.bind_port(serv, self.localhost)
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240 serv.listen(5)
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241 self.sock.connect(serv.getsockname())
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242 # Send a lot of data in order to bypass buffering in the TCP stack.
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243 self._sock_operation(100, 1.5, 'send', b"X" * 200000)
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244
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245 def testSendto(self):
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246 # Test sendto() timeout
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247 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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248 support.bind_port(serv, self.localhost)
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249 serv.listen(5)
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250 self.sock.connect(serv.getsockname())
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251 # The address argument is ignored since we already connected.
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252 self._sock_operation(100, 1.5, 'sendto', b"X" * 200000,
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253 serv.getsockname())
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254
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255 def testSendall(self):
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256 # Test sendall() timeout
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257 with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as serv:
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258 support.bind_port(serv, self.localhost)
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259 serv.listen(5)
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260 self.sock.connect(serv.getsockname())
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261 # Send a lot of data in order to bypass buffering in the TCP stack.
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262 self._sock_operation(100, 1.5, 'sendall', b"X" * 200000)
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263
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264
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265 class UDPTimeoutTestCase(TimeoutTestCase):
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266 """UDP test case for socket.socket() timeout functions"""
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267
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268 def setUp(self):
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269 self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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270
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271 def tearDown(self):
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272 self.sock.close()
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273
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274 def testRecvfromTimeout(self):
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275 # Test recvfrom() timeout
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276 # Prevent "Address already in use" socket exceptions
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277 support.bind_port(self.sock, self.localhost)
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278 self._sock_operation(1, 1.5, 'recvfrom', 1024)
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279
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280
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281 def test_main():
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282 support.requires('network')
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283 support.run_unittest(
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284 CreationTestCase,
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285 TCPTimeoutTestCase,
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286 UDPTimeoutTestCase,
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287 )
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288
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289 if __name__ == "__main__":
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290 test_main()