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      1 # Copyright (c) 2015 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.common_lib.cros.network import interface
      7 from autotest_lib.client.cros import dhcp_handling_rule
      8 from autotest_lib.client.cros import dhcp_packet
      9 from autotest_lib.client.cros import dhcp_test_base
     10 from autotest_lib.client.cros.networking import shill_proxy
     11 
     12 # Length of time the lease from the DHCP server is valid.
     13 LEASE_TIME_SECONDS = 60
     14 # We'll fill in the subnet and give this address to the client.
     15 INTENDED_IP_SUFFIX = "0.0.0.101"
     16 # We should be able to complete a DHCP negotiation in this amount of time.
     17 DHCP_NEGOTIATION_TIMEOUT_SECONDS = 10
     18 
     19 class network_DhcpFQDN(dhcp_test_base.DhcpTestBase):
     20     """Test implemenation of client completing negotiation with FQDN flag."""
     21 
     22     def test_body(self):
     23         """Main body of the test."""
     24         subnet_mask = self.ethernet_pair.interface_subnet_mask
     25         intended_ip = dhcp_test_base.DhcpTestBase.rewrite_ip_suffix(
     26                 subnet_mask,
     27                 self.server_ip,
     28                 INTENDED_IP_SUFFIX)
     29         # It doesn't matter what is contained in this option value, except that
     30         # the DHCP client does not crash decoding it or passing its
     31         # interpretation of it back to shill.
     32         fqdn_option = '\x03\xff\x00'
     33         # This is the pool of information the server will give out to the client
     34         # upon request.
     35         dhcp_options = {
     36                 dhcp_packet.OPTION_SERVER_ID : self.server_ip,
     37                 dhcp_packet.OPTION_SUBNET_MASK : subnet_mask,
     38                 dhcp_packet.OPTION_IP_LEASE_TIME : LEASE_TIME_SECONDS,
     39                 dhcp_packet.OPTION_REQUESTED_IP : intended_ip,
     40                 dhcp_packet.OPTION_FULLY_QUALIFIED_DOMAIN_NAME : fqdn_option
     41                 }
     42         rules = [
     43                 dhcp_handling_rule.DhcpHandlingRule_RespondToDiscovery(
     44                         intended_ip, self.server_ip, dhcp_options, {}),
     45                 dhcp_handling_rule.DhcpHandlingRule_RespondToRequest(
     46                         intended_ip, self.server_ip, dhcp_options, {})
     47                 ]
     48         rules[-1].is_final_handler = True
     49 
     50         # In some DHCP server implementations, the FQDN option is provided in
     51         # the DHCP ACK response without the client requesting it.
     52         rules[-1].force_reply_options = [
     53                 dhcp_packet.OPTION_FULLY_QUALIFIED_DOMAIN_NAME ]
     54 
     55         self.server.start_test(rules, DHCP_NEGOTIATION_TIMEOUT_SECONDS)
     56         self.server.wait_for_test_to_finish()
     57         if not self.server.last_test_passed:
     58             raise error.TestFail('Test server didn\'t get all the messages it '
     59                                  'was told to expect during negotiation.')
     60 
     61         # This test passes if the DHCP client lives long enough to send
     62         # the network configuration to shill.
     63         self.wait_for_dhcp_propagation()
     64         self.check_dhcp_config(dhcp_options)
     65