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