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 6 from autotest_lib.client.common_lib import error 7 from autotest_lib.client.common_lib.cros.network import interface 8 from autotest_lib.client.cros import dhcp_handling_rule 9 from autotest_lib.client.cros import dhcp_packet 10 from autotest_lib.client.cros import dhcp_test_base 11 from autotest_lib.client.cros.networking import shill_proxy 12 13 # Length of time the lease from the DHCP server is valid. 14 LEASE_TIME_SECONDS = 60 15 # We'll fill in the subnet and give this address to the client. 16 INTENDED_IP_SUFFIX = "0.0.0.101" 17 # We should be able to complete a DHCP negotiation in this amount of time. 18 DHCP_NEGOTIATION_TIMEOUT_SECONDS = 10 19 20 class network_DhcpMTU(dhcp_test_base.DhcpTestBase): 21 """Test implemenation of MTU including confirming the interface state.""" 22 23 def check_mtu_config(self, mtu): 24 """Check that the ipconfig and interface in the client has correct MTU. 25 26 @param mtu int expected MTU value. 27 28 """ 29 proxy = shill_proxy.ShillProxy() 30 device = proxy.find_object( 31 'Device', 32 {'Name': self.ethernet_pair.peer_interface_name}) 33 if device is None: 34 raise error.TestFail('Device was not found.') 35 device_properties = device.GetProperties(utf8_strings=True) 36 ipconfig_path = device_properties['IPConfigs'][0] 37 ipconfig = proxy.get_dbus_object('org.chromium.flimflam.IPConfig', 38 ipconfig_path) 39 ipconfig_properties = ipconfig.GetProperties(utf8_strings=True) 40 ipconfig_mtu = ipconfig_properties['Mtu'] 41 if ipconfig_mtu != mtu: 42 raise error.TestFail('Shill MTU %d does not match expected %d.' % 43 (ipconfig_mtu, mtu)) 44 45 interface_mtu = interface.Interface( 46 self.ethernet_pair.peer_interface_name).mtu 47 if interface_mtu != mtu: 48 raise error.TestFail('Interface MTU %d does not match ' 49 'expected %d.' % (interface_mtu, ipconfig_mtu)) 50 51 def test_body(self): 52 """Main body of the test.""" 53 subnet_mask = self.ethernet_pair.interface_subnet_mask 54 intended_ip = dhcp_test_base.DhcpTestBase.rewrite_ip_suffix( 55 subnet_mask, 56 self.server_ip, 57 INTENDED_IP_SUFFIX) 58 # Two real name servers, and a bogus one to be unpredictable. 59 dns_servers = ["8.8.8.8", "8.8.4.4", "192.168.87.88"] 60 interface_mtu = 1234 61 # This is the pool of information the server will give out to the client 62 # upon request. 63 dhcp_options = { 64 dhcp_packet.OPTION_SERVER_ID : self.server_ip, 65 dhcp_packet.OPTION_SUBNET_MASK : subnet_mask, 66 dhcp_packet.OPTION_IP_LEASE_TIME : LEASE_TIME_SECONDS, 67 dhcp_packet.OPTION_REQUESTED_IP : intended_ip, 68 dhcp_packet.OPTION_DNS_SERVERS : dns_servers, 69 dhcp_packet.OPTION_INTERFACE_MTU : interface_mtu 70 } 71 rules = [ 72 dhcp_handling_rule.DhcpHandlingRule_RespondToDiscovery( 73 intended_ip, self.server_ip, dhcp_options, {}), 74 dhcp_handling_rule.DhcpHandlingRule_RespondToRequest( 75 intended_ip, self.server_ip, dhcp_options, {}) 76 ] 77 rules[-1].is_final_handler = True 78 self.server.start_test(rules, DHCP_NEGOTIATION_TIMEOUT_SECONDS) 79 self.server.wait_for_test_to_finish() 80 if not self.server.last_test_passed: 81 raise error.TestFail("Test server didn't get all the messages it " 82 "was told to expect during negotiation.") 83 84 self.wait_for_dhcp_propagation() 85 self.check_mtu_config(interface_mtu) 86
