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"""
Unit tests for the stem.util.connection functions.
"""
import platform
import unittest
import stem.util.connection
from stem.util.connection import Resolver, Connection
try:
# added in python 3.3
from unittest.mock import patch
except ImportError:
from mock import patch
NETSTAT_OUTPUT = """\
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 192.168.0.1:5939 73.94.23.87:443 ESTABLISHED 20586/firefox
tcp 0 0 192.168.0.1:4325 73.94.23.55:443 ESTABLISHED 20586/firefox
tcp 1 0 192.168.0.1:4378 29.208.141.42:443 CLOSE_WAIT 20586/firefox
tcp 0 0 127.0.0.1:22 127.0.0.1:56673 ESTABLISHED -
tcp 0 586 192.168.0.1:44284 38.229.79.2:443 ESTABLISHED 15843/tor
tcp 0 0 192.168.0.1:37909 16.111.19.278:6697 ESTABLISHED -
Active UNIX domain sockets (w/o servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 14 [ ] DGRAM 8433 - /dev/log
unix 3 [ ] STREAM CONNECTED 34164277 15843/tor
unix 3 [ ] STREAM CONNECTED 34164276 15843/tor
unix 3 [ ] STREAM CONNECTED 7951 -
"""
SS_OUTPUT = """\
Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port
tcp CLOSE-WAIT 1 0 192.168.0.1:43780 53.203.145.45:443 users:(("firefox",20586,118))
tcp ESTAB 55274 0 192.168.0.1:46136 196.153.236.35:80 users:(("firefox",20586,93))
tcp ESTAB 0 0 192.168.0.1:44092 23.112.135.72:443 users:(("tor",15843,10))
tcp ESTAB 0 0 127.0.0.1:22 127.0.0.1:56673
tcp ESTAB 0 0 192.168.0.1:44415 38.229.79.2:443 users:(("tor",15843,9))
"""
LSOF_OUTPUT = """\
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ubuntu-ge 2164 atagar 11u IPv4 13593 0t0 TCP 192.168.0.1:55395->21.89.91.78:80 (CLOSE_WAIT)
tor 15843 atagar 6u IPv4 34164278 0t0 TCP 127.0.0.1:9050 (LISTEN)
tor 15843 atagar 7u IPv4 34164279 0t0 TCP 127.0.0.1:9051 (LISTEN)
tor 15843 atagar 9u IPv4 34188132 0t0 TCP 192.168.0.1:44415->38.229.79.2:443 (ESTABLISHED)
tor 15843 atagar 10u IPv4 34165291 0t0 TCP 192.168.0.1:44092->68.169.35.102:443 (ESTABLISHED)
python 16422 atagar 3u IPv4 34203773 0t0 UDP 127.0.0.1:39624->127.0.0.1:53
firefox 20586 atagar 66u IPv4 5765353 0t0 TCP 192.168.0.1:47486->62.135.16.134:443 (ESTABLISHED)
firefox 20586 atagar 71u IPv4 13094989 0t0 TCP 192.168.0.1:43762->182.3.10.42:443 (CLOSE_WAIT)
"""
LSOF_OUTPUT_OSX = """\
tor 129 atagar 4u IPv4 0xffffff3527af0500 0t0 TCP 127.0.0.1:9051 (LISTEN)
tor 129 atagar 5u IPv4 0xffffff363af9de40 0t0 TCP 192.168.1.10:9090 (LISTEN)
tor 129 atagar 6u IPv4 0xffffff306a960a40 0t0 TCP 192.168.1.10:9091 (LISTEN)
tor 129 atagar 8u IPv6 0xffffff13f5575a98 0t0 UDP *:48718
tor 129 atagar 9u IPv6 0xffffff1b2273a178 0t0 UDP *:48714
tor 129 atagar 10u IPv6 0xffffff1b473a9758 0t0 UDP *:48716
tor 129 atagar 11u IPv6 0xffffff1b5733aa48 0t0 UDP *:48719
tor 129 atagar 12u IPv4 0xffffff1cc6dd0160 0t0 TCP 192.168.1.20:9090->38.229.79.2:14010 (ESTABLISHED)
tor 129 atagar 22u IPv4 0xffffff35c9125500 0t0 TCP 192.168.1.20:9090->68.169.35.102:14815 (ESTABLISHED)
tor 129 atagar 23u IPv4 0xffffff3236168160 0t0 TCP 192.168.1.20:9090->62.135.16.134:14456 (ESTABLISHED)
"""
SOCKSTAT_OUTPUT = """\
USER PROCESS PID PROTO SOURCE ADDRESS FOREIGN ADDRESS STATE
atagar ubuntu-geoip-pr 2164 tcp4 192.168.0.1:55395 141.18.34.33:80 CLOSE_WAIT
atagar tor 15843 tcp4 127.0.0.1:9050 *:* LISTEN
atagar tor 15843 tcp4 127.0.0.1:9051 *:* LISTEN
atagar tor 15843 tcp4 192.168.0.1:44415 38.229.79.2:443 ESTABLISHED
atagar tor 15843 tcp4 192.168.0.1:44092 68.169.35.102:443 ESTABLISHED
atagar firefox 20586 tcp4 192.168.0.1:47486 213.24.100.160:443 ESTABLISHED
atagar firefox 20586 tcp4 192.168.0.1:43762 32.188.221.72:443 CLOSE_WAIT
"""
# I don't have actual sockstat and procstat output for FreeBSD. Rather, these
# are snippets of output from email threads.
BSD_SOCKSTAT_OUTPUT = """\
_tor tor 4397 7 tcp4 172.27.72.202:9050 *:*
_tor tor 4397 8 udp4 172.27.72.202:53 *:*
_tor tor 4397 9 tcp4 172.27.72.202:9051 *:*
_tor tor 4397 12 tcp4 172.27.72.202:54011 38.229.79.2:9001
_tor tor 4397 15 tcp4 172.27.72.202:59374 68.169.35.102:9001
_tor tor 4397 19 tcp4 172.27.72.202:59673 213.24.100.160:9001
_tor tor 4397 20 tcp4 172.27.72.202:51946 32.188.221.72:443
_tor tor 4397 22 tcp4 172.27.72.202:60344 21.89.91.78:9001
"""
BSD_PROCSTAT_OUTPUT = """\
PID COMM FD T V FLAGS REF OFFSET PRO NAME
3561 tor 4 s - rw---n-- 2 0 TCP 10.0.0.2:9050 10.0.0.1:22370
3561 tor 5 s - rw---n-- 2 0 TCP 10.0.0.2:9050 0.0.0.0:0
3561 tor 6 s - rw---n-- 2 0 TCP 10.0.0.2:9040 0.0.0.0:0
3561 tor 7 s - rw---n-- 2 0 UDP 10.0.0.2:53 0.0.0.0:0
3561 tor 8 s - rw---n-- 2 0 TCP 10.0.0.2:9051 0.0.0.0:0
3561 tor 14 s - rw---n-- 2 0 TCP 10.0.0.2:9050 10.0.0.1:44381
3561 tor 15 s - rw---n-- 2 0 TCP 10.0.0.2:33734 38.229.79.2:443
3561 tor 16 s - rw---n-- 2 0 TCP 10.0.0.2:47704 68.169.35.102:9001
"""
class TestConnection(unittest.TestCase):
@patch('stem.util.system.is_available')
@patch('stem.util.proc.is_available')
def test_get_system_resolvers(self, proc_mock, is_available_mock):
"""
Checks the get_system_resolvers function.
"""
is_available_mock.return_value = True
proc_mock.return_value = False
self.assertEqual([], stem.util.connection.get_system_resolvers('Windows'))
self.assertEqual([Resolver.LSOF], stem.util.connection.get_system_resolvers('Darwin'))
self.assertEqual([Resolver.LSOF], stem.util.connection.get_system_resolvers('OpenBSD'))
self.assertEqual([Resolver.BSD_SOCKSTAT, Resolver.BSD_PROCSTAT, Resolver.LSOF], stem.util.connection.get_system_resolvers('FreeBSD'))
self.assertEqual([Resolver.NETSTAT, Resolver.SOCKSTAT, Resolver.LSOF, Resolver.SS], stem.util.connection.get_system_resolvers('Linux'))
proc_mock.return_value = True
self.assertEqual([Resolver.PROC, Resolver.NETSTAT, Resolver.SOCKSTAT, Resolver.LSOF, Resolver.SS], stem.util.connection.get_system_resolvers('Linux'))
# check that calling without an argument is equivilant to calling for this
# platform
self.assertEqual(stem.util.connection.get_system_resolvers(platform.system()), stem.util.connection.get_system_resolvers())
# check that lacking commands in our PATH drops them from the results
is_available_mock.return_value = False
self.assertEqual([Resolver.PROC], stem.util.connection.get_system_resolvers('Linux'))
def test_port_usage(self):
"""
Check that port_usage can load our config and provide the expected results.
"""
self.assertEqual('HTTP', stem.util.connection.port_usage(80))
self.assertEqual('HTTP', stem.util.connection.port_usage('80')) # query with a string
self.assertEqual('BitTorrent', stem.util.connection.port_usage(6881)) # min and max value of a range
self.assertEqual('BitTorrent', stem.util.connection.port_usage(6999))
self.assertEqual(None, stem.util.connection.port_usage(30000)) # unrecognized port
@patch('stem.util.proc.get_connections')
def test_get_connections_by_proc(self, proc_mock):
"""
Checks the get_connections function with the proc resolver.
"""
proc_mock.return_value = [
('17.17.17.17', 4369, '34.34.34.34', 8738, 'tcp'),
('187.187.187.187', 48059, '204.204.204.204', 52428, 'tcp'),
]
expected = [
Connection('17.17.17.17', 4369, '34.34.34.34', 8738, 'tcp'),
Connection('187.187.187.187', 48059, '204.204.204.204', 52428, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.PROC, process_pid = 1111))
proc_mock.side_effect = IOError('No connections for you!')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.PROC, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_netstat(self, call_mock):
"""
Checks the get_connections function with the netstat resolver.
"""
call_mock.return_value = NETSTAT_OUTPUT.split('\n')
expected = [Connection('192.168.0.1', 44284, '38.229.79.2', 443, 'tcp')]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.NETSTAT, process_pid = 15843, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.NETSTAT, process_pid = 15843, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.NETSTAT, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call netstat')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.NETSTAT, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_ss(self, call_mock):
"""
Checks the get_connections function with the ss resolver.
"""
call_mock.return_value = SS_OUTPUT.split('\n')
expected = [
Connection('192.168.0.1', 44092, '23.112.135.72', 443, 'tcp'),
Connection('192.168.0.1', 44415, '38.229.79.2', 443, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.SS, process_pid = 15843, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SS, process_pid = 15843, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SS, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call ss')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SS, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_lsof(self, call_mock):
"""
Checks the get_connections function with the lsof resolver.
"""
call_mock.return_value = LSOF_OUTPUT.split('\n')
expected = [
Connection('192.168.0.1', 44415, '38.229.79.2', 443, 'tcp'),
Connection('192.168.0.1', 44092, '68.169.35.102', 443, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.LSOF, process_pid = 15843, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.LSOF, process_pid = 15843, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.LSOF, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call lsof')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.LSOF, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_lsof_osx(self, call_mock):
"""
Checks the get_connections function with the lsof resolver on OSX. This
only includes entries for the tor process.
"""
call_mock.return_value = LSOF_OUTPUT_OSX.split('\n')
expected = [
Connection('192.168.1.20', 9090, '38.229.79.2', 14010, 'tcp'),
Connection('192.168.1.20', 9090, '68.169.35.102', 14815, 'tcp'),
Connection('192.168.1.20', 9090, '62.135.16.134', 14456, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.LSOF, process_pid = 129, process_name = 'tor'))
@patch('stem.util.system.call')
def test_get_connections_by_sockstat(self, call_mock):
"""
Checks the get_connections function with the sockstat resolver.
"""
call_mock.return_value = SOCKSTAT_OUTPUT.split('\n')
expected = [
Connection('192.168.0.1', 44415, '38.229.79.2', 443, 'tcp'),
Connection('192.168.0.1', 44092, '68.169.35.102', 443, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.SOCKSTAT, process_pid = 15843, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SOCKSTAT, process_pid = 15843, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SOCKSTAT, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call sockstat')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.SOCKSTAT, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_sockstat_for_bsd(self, call_mock):
"""
Checks the get_connections function with the bsd variant of the sockstat
resolver.
"""
call_mock.return_value = BSD_SOCKSTAT_OUTPUT.split('\n')
expected = [
Connection('172.27.72.202', 54011, '38.229.79.2', 9001, 'tcp'),
Connection('172.27.72.202', 59374, '68.169.35.102', 9001, 'tcp'),
Connection('172.27.72.202', 59673, '213.24.100.160', 9001, 'tcp'),
Connection('172.27.72.202', 51946, '32.188.221.72', 443, 'tcp'),
Connection('172.27.72.202', 60344, '21.89.91.78', 9001, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.BSD_SOCKSTAT, process_pid = 4397, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_SOCKSTAT, process_pid = 4397, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_SOCKSTAT, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call sockstat')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_SOCKSTAT, process_pid = 1111)
@patch('stem.util.system.call')
def test_get_connections_by_procstat(self, call_mock):
"""
Checks the get_connections function with the procstat resolver.
"""
call_mock.return_value = BSD_PROCSTAT_OUTPUT.split('\n')
expected = [
Connection('10.0.0.2', 9050, '10.0.0.1', 22370, 'tcp'),
Connection('10.0.0.2', 9050, '10.0.0.1', 44381, 'tcp'),
Connection('10.0.0.2', 33734, '38.229.79.2', 443, 'tcp'),
Connection('10.0.0.2', 47704, '68.169.35.102', 9001, 'tcp'),
]
self.assertEqual(expected, stem.util.connection.get_connections(Resolver.BSD_PROCSTAT, process_pid = 3561, process_name = 'tor'))
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_PROCSTAT, process_pid = 3561, process_name = 'stuff')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_PROCSTAT, process_pid = 1111, process_name = 'tor')
call_mock.side_effect = OSError('Unable to call procstat')
self.assertRaises(IOError, stem.util.connection.get_connections, Resolver.BSD_PROCSTAT, process_pid = 1111)
def test_is_valid_ipv4_address(self):
"""
Checks the is_valid_ipv4_address function.
"""
valid_addresses = (
'0.0.0.0',
'1.2.3.4',
'192.168.0.1',
'255.255.255.255',
)
invalid_addresses = (
'0.0.00.0',
'0.0.0',
'1.2.3.256',
'1.2.3.-1',
'0.0.0.a',
'a.b.c.d',
)
for address in valid_addresses:
self.assertTrue(stem.util.connection.is_valid_ipv4_address(address))
for address in invalid_addresses:
self.assertFalse(stem.util.connection.is_valid_ipv4_address(address))
def test_is_valid_ipv6_address(self):
"""
Checks the is_valid_ipv6_address function.
"""
valid_addresses = (
'fe80:0000:0000:0000:0202:b3ff:fe1e:8329',
'fe80:0:0:0:202:b3ff:fe1e:8329',
'fe80::202:b3ff:fe1e:8329',
'::',
)
invalid_addresses = (
'fe80:0000:0000:0000:0202:b3ff:fe1e:829g',
'fe80:0000:0000:0000:0202:b3ff:fe1e: 8329',
'2001:db8::aaaa::1',
':::',
':',
'',
)
for address in valid_addresses:
self.assertTrue(stem.util.connection.is_valid_ipv6_address(address))
for address in invalid_addresses:
self.assertFalse(stem.util.connection.is_valid_ipv6_address(address))
def test_is_valid_port(self):
"""
Checks the is_valid_port function.
"""
valid_ports = (1, '1', 1234, '1234', 65535, '65535')
invalid_ports = (0, '0', 65536, '65536', 'abc', '*', ' 15', '01')
for port in valid_ports:
self.assertTrue(stem.util.connection.is_valid_port(port))
for port in invalid_ports:
self.assertFalse(stem.util.connection.is_valid_port(port))
self.assertTrue(stem.util.connection.is_valid_port(0, allow_zero = True))
self.assertTrue(stem.util.connection.is_valid_port('0', allow_zero = True))
def test_is_private_address(self):
"""
Checks the is_private_address function.
"""
self.assertTrue(stem.util.connection.is_private_address('127.0.0.1'))
self.assertTrue(stem.util.connection.is_private_address('10.0.0.0'))
self.assertTrue(stem.util.connection.is_private_address('172.16.0.0'))
self.assertTrue(stem.util.connection.is_private_address('172.31.0.0'))
self.assertTrue(stem.util.connection.is_private_address('192.168.0.50'))
self.assertFalse(stem.util.connection.is_private_address('74.125.28.103'))
self.assertFalse(stem.util.connection.is_private_address('172.15.0.0'))
self.assertFalse(stem.util.connection.is_private_address('172.32.0.0'))
self.assertRaises(ValueError, stem.util.connection.is_private_address, '')
self.assertRaises(ValueError, stem.util.connection.is_private_address, 'blarg')
self.assertRaises(ValueError, stem.util.connection.is_private_address, '127.0.0')
self.assertRaises(ValueError, stem.util.connection.is_private_address, 'fe80:0000:0000:0000:0202:b3ff:fe1e:8329')
def test_expand_ipv6_address(self):
"""
Checks the expand_ipv6_address function.
"""
test_values = {
'2001:db8::ff00:42:8329': '2001:0db8:0000:0000:0000:ff00:0042:8329',
'::': '0000:0000:0000:0000:0000:0000:0000:0000',
'::1': '0000:0000:0000:0000:0000:0000:0000:0001',
'1::1': '0001:0000:0000:0000:0000:0000:0000:0001',
}
for test_arg, expected in test_values.items():
self.assertEquals(expected, stem.util.connection.expand_ipv6_address(test_arg))
self.assertRaises(ValueError, stem.util.connection.expand_ipv6_address, '127.0.0.1')
def test_get_mask_ipv4(self):
"""
Checks the get_mask_ipv4 function.
"""
self.assertEquals('255.255.255.255', stem.util.connection.get_mask_ipv4(32))
self.assertEquals('255.255.255.248', stem.util.connection.get_mask_ipv4(29))
self.assertEquals('255.255.254.0', stem.util.connection.get_mask_ipv4(23))
self.assertEquals('0.0.0.0', stem.util.connection.get_mask_ipv4(0))
self.assertRaises(ValueError, stem.util.connection.get_mask_ipv4, -1)
self.assertRaises(ValueError, stem.util.connection.get_mask_ipv4, 33)
def test_get_mask_ipv6(self):
"""
Checks the get_mask_ipv6 function.
"""
self.assertEquals('FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF', stem.util.connection.get_mask_ipv6(128))
self.assertEquals('FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFE:0000', stem.util.connection.get_mask_ipv6(111))
self.assertEquals('0000:0000:0000:0000:0000:0000:0000:0000', stem.util.connection.get_mask_ipv6(0))
self.assertRaises(ValueError, stem.util.connection.get_mask_ipv6, -1)
self.assertRaises(ValueError, stem.util.connection.get_mask_ipv6, 129)
def test_get_masked_bits(self):
"""
Checks the _get_masked_bits function.
"""
self.assertEquals(32, stem.util.connection._get_masked_bits('255.255.255.255'))
self.assertEquals(29, stem.util.connection._get_masked_bits('255.255.255.248'))
self.assertEquals(23, stem.util.connection._get_masked_bits('255.255.254.0'))
self.assertEquals(0, stem.util.connection._get_masked_bits('0.0.0.0'))
self.assertRaises(ValueError, stem.util.connection._get_masked_bits, 'blarg')
self.assertRaises(ValueError, stem.util.connection._get_masked_bits, '255.255.0.255')
def test_get_address_binary(self):
"""
Checks the _get_address_binary function.
"""
test_values = {
'0.0.0.0': '00000000000000000000000000000000',
'1.2.3.4': '00000001000000100000001100000100',
'127.0.0.1': '01111111000000000000000000000001',
'255.255.255.255': '11111111111111111111111111111111',
'::': '0' * 128,
'::1': ('0' * 127) + '1',
'1::1': '0000000000000001' + ('0' * 111) + '1',
'2001:db8::ff00:42:8329': '00100000000000010000110110111000000000000000000000000000000000000000000000000000111111110000000000000000010000101000001100101001',
}
for test_arg, expected in test_values.items():
self.assertEquals(expected, stem.util.connection._get_address_binary(test_arg))
self.assertRaises(ValueError, stem.util.connection._get_address_binary, '')
self.assertRaises(ValueError, stem.util.connection._get_address_binary, 'blarg')
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