blob: 9d38bc8506f3dc9369572edd736b70a58f7321b8 [file] [log] [blame]
# Copyright (c) 2013 The Chromium OS 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 logging
import os
import sys
import tempfile
from autotest_lib.client.bin import test
from autotest_lib.client.common_lib import error, utils
from autotest_lib.client.common_lib.cros import avahi_utils
from autotest_lib.client.cros import service_stopper
from autotest_lib.client.cros.netprotos import cros_p2p, zeroconf
P2P_CLIENT = '/usr/sbin/p2p-client'
class p2p_ConsumeFiles(test.test):
"""The P2P Client class tester.
Creates a fake network of peers with lansim and tests if p2p-client can
discover files on that network.
version = 1
def setup(self):
def initialize(self):
dep = 'lansim'
dep_dir = os.path.join(self.autodir, 'deps', dep)'lansim is at %s', dep_dir)
self.job.install_pkg(dep, 'dep', dep_dir)
# Import the lansim modules installed on lansim/build/
sys.path.append(os.path.join(dep_dir, 'build'))
self._services = None
self._tap = None
def cleanup(self):
if self._tap:
if self._services:
def _setup_avahi(self):
"""Initializes avahi daemon on a new tap interface."""
from lansim import tuntap
# Ensure p2p and avahi aren't running.
self._services = service_stopper.ServiceStopper(['p2p', 'avahi'])
# Initialize avahi-daemon listenning only on the fake TAP interface.
self._tap = tuntap.TunTap(tuntap.IFF_TAP, name='faketap')
# The network 169.254/16 shouldn't clash with other real services. We
# use a /24 subnet of it here.
self._tap.set_addr('', mask=24)
# Re-launch avahi-daemon on the tap interface.
def _run_p2p_client(self, args, timeout=10., ignore_status=False):
"""Run p2p-client with the provided arguments.
@param args: list of strings, each one representing an argument.
@param timeout: Timeout for p2p-client in seconds before it's killed.
@return: the return value of the process and the stdout content.
fd, tempfn = tempfile.mkstemp(prefix='p2p-output')
ret =
P2P_CLIENT, args=['-v=1'] + list(args), timeout=timeout,
ignore_timeout=True, ignore_status=True,
stdout_tee=open(tempfn, 'w'), stderr_tee=sys.stdout)
url = os.fdopen(fd).read()
if not ignore_status and ret is None:
raise error.TestFail('p2p-client %s timeout.' % ' '.join(args))
if not ignore_status and ret.exit_status != 0:
raise error.TestFail('p2p-client %s finished with value: %d' % (
' '.join(args), ret.exit_status))
return None if ret is None else ret.exit_status, url
def _join_simulator(self):
"""Stops the simulator and logs any exception generated there."""
if self._sim.error:
logging.error('SimulatorThread exception: %r', self._sim.error)
def run_once(self):
from lansim import simulator, host
# Setup the environment where avahi-daemon runs during the test.
self._sim = simulator.SimulatorThread(self._tap)
# Create three peers host-a, host-b and host-c sharing a set of files.
# This first block creates the fake host on the simulator. For clarity
# and easier debug, note that the last octect on the IPv4 address is the
# ASCII for a, b and c respectively.
peer_a = host.SimpleHost(self._sim, '94:EB:2C:00:00:61',
peer_b = host.SimpleHost(self._sim, '94:EB:2C:00:00:62',
peer_c = host.SimpleHost(self._sim, '94:EB:2C:00:00:63',
# Run a userspace implementation of avahi + p2p-server on the fake
# hosts. This announces the P2P service on each fake host.
zero_a = zeroconf.ZeroconfDaemon(peer_a, 'host-a')
zero_b = zeroconf.ZeroconfDaemon(peer_b, 'host-b')
zero_c = zeroconf.ZeroconfDaemon(peer_c, 'host-c')
cros_a = cros_p2p.CrosP2PDaemon(zero_a)
cros_b = cros_p2p.CrosP2PDaemon(zero_b)
cros_c = cros_p2p.CrosP2PDaemon(zero_c)
# Add files to each host. All the three hosts share the file "everyone"
# with different size, used to test the minimum-size argument.
# host-a and host-b share another file only-a and only-b respectively,
# used to check that the p2p-client picks the right peer.
cros_a.add_file('everyone', 1000)
cros_b.add_file('everyone', 10000)
cros_c.add_file('everyone', 20000)
cros_a.add_file('only-a', 5000)
cros_b.add_file('only-b', 8000)
# Initially set the number of connections on the network to a low number
# (two) that later will be increased to test if p2p-client hangs when
# there are too many connections.
### Request a file shared from only one peer.
_ret, url = self._run_p2p_client(
args=('--get-url=only-a',), timeout=10.)
if url.strip() != '':
raise error.TestFail('Received unknown url: "%s"' % url)
### Check that the num_connections is reported properly.
_ret, conns = self._run_p2p_client(args=('--num-connections',),
if conns.strip() != '2':
raise error.TestFail('Wrong number of connections reported: %s' %
### Request a file shared from a peer with enough of the file.
_ret, url = self._run_p2p_client(
args=('--get-url=everyone', '--minimum-size=15000'),
if url.strip() != '':
raise error.TestFail('Received unknown url: "%s"' % url)
### Request too much bytes of an existing file.
ret, url = self._run_p2p_client(
args=('--get-url=only-b', '--minimum-size=10000'),
timeout=10., ignore_status=True)
if url:
raise error.TestFail('Received url but expected none: "%s"' % url)
if ret == 0:
raise error.TestFail('p2p-client returned no URL, but without an '
### Check that p2p-client hangs while waiting for a peer when there are
### too many connections.
lambda: cros_a.set_num_connections(99, announce=True))
# For a query on the DUT to check that the new information is received.
for attempt in range(5):
_ret, conns = self._run_p2p_client(args=('--num-connections',),
conns = conns.strip()
if conns == '100':
if conns != '100':
raise error.TestFail("p2p-client --num-connections doesn't reflect "
"the current number of connections on the "
"network, returned %s" % conns)
ret, url = self._run_p2p_client(
args=('--get-url=only-b',), timeout=5., ignore_status=True)
if not ret is None:
raise error.TestFail('p2p-client finished but should have waited '
'for num_connections to drop.')
if self._sim.error:
raise error.TestError('SimulatorThread ended with an exception: %r'
% self._sim.error)