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      1 # Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 from autotest_lib.client.common_lib import error
      6 from autotest_lib.client.cros import dhcp_handling_rule
      7 from autotest_lib.client.cros import dhcp_packet
      8 from autotest_lib.client.cros import dhcp_test_base
      9 from autotest_lib.client.cros.networking import shill_proxy
     10 
     11 # Length of time the lease from the DHCP server is valid.
     12 LEASE_TIME_SECONDS = 60
     13 # We'll fill in the subnet and give this address to the client.
     14 INTENDED_IP_SUFFIX = "0.0.0.101"
     15 # We should be able to complete a DHCP negotiation in this amount of time.
     16 DHCP_NEGOTIATION_TIMEOUT_SECONDS = 10
     17 
     18 class network_DhcpWpadNegotiation(dhcp_test_base.DhcpTestBase):
     19     """Test implemenation of WPAD negotiation."""
     20 
     21     def check_wpad_config(self, proxy_auto_config):
     22         """Check that the ipconfig in the client shows the the proxy config.
     23 
     24         @param proxy_auto_config string expected value for proxy autoconfig.
     25 
     26         """
     27         proxy = shill_proxy.ShillProxy()
     28         device = proxy.find_object(
     29                 'Device',
     30                 {'Name': self.ethernet_pair.peer_interface_name})
     31         if device is None:
     32             raise error.TestFail('Device was not found.')
     33         device_properties = device.GetProperties(utf8_strings=True)
     34         ipconfig_path = device_properties['IPConfigs'][0]
     35         ipconfig = proxy.get_dbus_object('org.chromium.flimflam.IPConfig',
     36                                          ipconfig_path)
     37         ipconfig_properties = ipconfig.GetProperties(utf8_strings=True)
     38         ipconfig_proxy_auto_config = ipconfig_properties[
     39                 'WebProxyAutoDiscoveryUrl']
     40         if ipconfig_proxy_auto_config != proxy_auto_config:
     41             raise error.TestFail('Shill proxy config %s does not match '
     42                                  'expected %s.' %
     43                                  (proxy_auto_config,
     44                                   ipconfig_proxy_auto_config))
     45 
     46 
     47     def test_body(self):
     48         """Main body of the test."""
     49         subnet_mask = self.ethernet_pair.interface_subnet_mask
     50         intended_ip = dhcp_test_base.DhcpTestBase.rewrite_ip_suffix(
     51                 subnet_mask,
     52                 self.server_ip,
     53                 INTENDED_IP_SUFFIX)
     54         # Two real name servers, and a bogus one to be unpredictable.
     55         dns_servers = ["8.8.8.8", "8.8.4.4", "192.168.87.88"]
     56         proxy_auto_config = "http://server:8080/wpad.dat"
     57         # This is the pool of information the server will give out to the client
     58         # upon request.
     59         dhcp_options = {
     60                 dhcp_packet.OPTION_SERVER_ID : self.server_ip,
     61                 dhcp_packet.OPTION_SUBNET_MASK : subnet_mask,
     62                 dhcp_packet.OPTION_IP_LEASE_TIME : LEASE_TIME_SECONDS,
     63                 dhcp_packet.OPTION_REQUESTED_IP : intended_ip,
     64                 dhcp_packet.OPTION_DNS_SERVERS : dns_servers,
     65                 dhcp_packet.OPTION_WEB_PROXY_AUTO_DISCOVERY : proxy_auto_config
     66                 }
     67         rules = [
     68                 dhcp_handling_rule.DhcpHandlingRule_RespondToDiscovery(
     69                         intended_ip, self.server_ip, dhcp_options, {}),
     70                 dhcp_handling_rule.DhcpHandlingRule_RespondToRequest(
     71                         intended_ip, self.server_ip, dhcp_options, {})
     72                 ]
     73         rules[-1].is_final_handler = True
     74         self.server.start_test(rules, DHCP_NEGOTIATION_TIMEOUT_SECONDS)
     75         self.server.wait_for_test_to_finish()
     76         if not self.server.last_test_passed:
     77             raise error.TestFail("Test server didn't get all the messages it "
     78                                  "was told to expect during negotiation.")
     79 
     80         self.wait_for_dhcp_propagation()
     81         self.check_wpad_config(proxy_auto_config)
     82