65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import android_commands
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import constants
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import logging
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import os
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import subprocess
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import time
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class FakeDns(object):
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"""Wrapper class for the fake_dns tool."""
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_FAKE_DNS_PATH = constants.TEST_EXECUTABLE_DIR + '/fake_dns'
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def __init__(self, adb, build_type):
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"""
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Args:
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adb: the AndroidCommands to use.
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build_type: 'Release' or 'Debug'.
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"""
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self._adb = adb
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self._build_type = build_type
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self._fake_dns = None
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self._original_dns = None
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def _PushAndStartFakeDns(self):
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"""Starts the fake_dns server that replies all name queries 127.0.0.1.
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Returns:
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subprocess instance connected to the fake_dns process on the device.
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"""
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self._adb.PushIfNeeded(
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os.path.join(constants.DIR_SOURCE_ROOT, 'out', self._build_type,
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'fake_dns'),
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FakeDns._FAKE_DNS_PATH)
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return subprocess.Popen(
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['adb', '-s', self._adb._adb.GetSerialNumber(),
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'shell', '%s -D' % FakeDns._FAKE_DNS_PATH])
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def SetUp(self):
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"""Configures the system to point to a DNS server that replies 127.0.0.1.
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This can be used in combination with the forwarder to forward all web
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traffic to a replay server.
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The TearDown() method will perform all cleanup.
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"""
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self._adb.RunShellCommand('ip route add 8.8.8.0/24 via 127.0.0.1 dev lo')
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self._fake_dns = self._PushAndStartFakeDns()
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self._original_dns = self._adb.RunShellCommand('getprop net.dns1')[0]
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self._adb.RunShellCommand('setprop net.dns1 127.0.0.1')
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time.sleep(2) # Time for server to start and the setprop to take effect.
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def TearDown(self):
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"""Shuts down the fake_dns."""
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if self._fake_dns:
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if not self._original_dns or self._original_dns == '127.0.0.1':
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logging.warning('Bad original DNS, falling back to Google DNS.')
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self._original_dns = '8.8.8.8'
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self._adb.RunShellCommand('setprop net.dns1 %s' % self._original_dns)
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self._fake_dns.kill()
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self._adb.RunShellCommand('ip route del 8.8.8.0/24 via 127.0.0.1 dev lo')
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