1 #!/usr/bin/python 2 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 import cellular_logging 7 import dbus, os, subprocess, time 8 9 from autotest_lib.client.common_lib import error 10 from autotest_lib.client.cros import flimflam_test_path 11 from autotest_lib.client.cros.cellular import modem 12 13 log = cellular_logging.SetupCellularLogging('mm_test') 14 15 16 class ModemManagerTest(object): 17 """Wrapper for starting up ModemManager in an artificial testing 18 environment, connected to a fake modem program and talking to a 19 fake (tun) network device. 20 21 The test using this must ensure the setup of the fakegudev and 22 fakemodem deps. 23 """ 24 25 def __init__(self, autodir, modem_pattern_files): 26 self.autodir=autodir # not great. Examine deps directly? 27 self.modem_pattern_files = modem_pattern_files 28 self.modemmanager = None 29 self.fakemodem_process = None 30 self.fakenet_process = None 31 32 def _start_fake_network(self): 33 """Start the fakenetwork program and return the fake interface name 34 35 Start up the fakenet program, which uses the tun driver to create 36 a network device. 37 38 Returns the name of the fake network interface. 39 Sets self.fakenet_process as a handle to the process. 40 """ 41 self.fakenet_process = subprocess.Popen( 42 os.path.join(self.autodir,'deps/fakemodem/bin','fakenet'), 43 stdout=subprocess.PIPE) 44 return self.fakenet_process.stdout.readline().rstrip() 45 46 47 def _start_fake_modem(self, patternfiles): 48 """Start the fakemodem program and return the pty path to access it 49 50 Start up the fakemodem program 51 Argument: 52 patternfiles -- List of files to read for command/response patterns 53 54 Returns the device path of the pty that serves the fake modem, e.g. 55 /dev/pts/4. 56 Sets self.fakemodem_process as a handle to the process, and 57 self.fakemodem as a DBus interface to it. 58 """ 59 scriptargs = ["--patternfile=" + x for x in patternfiles] 60 name = os.path.join(self.autodir, 'deps/fakemodem/bin', 'fakemodem') 61 self.fakemodem_process = subprocess.Popen( 62 [os.path.join(self.autodir, 'deps/fakemodem/bin', 'fakemodem')] 63 + scriptargs, 64 stdout=subprocess.PIPE) 65 ptyname = self.fakemodem_process.stdout.readline().rstrip() 66 time.sleep(2) # XXX 67 self.fakemodem = dbus.Interface( 68 dbus.SystemBus().get_object('org.chromium.FakeModem', '/'), 69 'org.chromium.FakeModem') 70 return ptyname 71 72 73 def _start_modemmanager(self, netname, modemname): 74 """Start modemmanager under the control of fake devices. 75 76 Arguments: 77 netname -- fake network interface name (e.g. tun0) 78 modemname -- path to pty slave device of fake modem (e.g. /dev/pts/4) 79 80 Returns... 81 82 """ 83 id_props = ['property_ID_MM_CANDIDATE=1', 84 'property_ID_VENDOR_ID=04e8', # Samsung USB VID 85 'property_ID_MODEL_ID=6872' # Y3300 modem PID 86 ] 87 tty_device = (['device_file=%s' % (modemname), 88 'name=%s' % (modemname[5:]), # remove leading /dev/ 89 'subsystem=tty', 90 'driver=fake', 91 'sysfs_path=/sys/devices/fake/tty', 92 'parent=/dev/fake-parent'] + 93 id_props) 94 net_device = (['device_file=/dev/fakenet', 95 'name=%s' % (netname), 96 'subsystem=net', 97 'driver=fake', 98 'sysfs_path=/sys/devices/fake/net', 99 'parent=/dev/fake-parent'] + 100 id_props) 101 parent_device=['device_file=/dev/fake-parent', 102 'sysfs_path=/sys/devices/fake/parent', 103 'devtype=usb_device', 104 'subsystem=usb'] 105 environment = { 'FAKEGUDEV_DEVICES' : ':'.join(tty_device + 106 net_device + 107 parent_device), 108 'FAKEGUDEV_BLOCK_REAL' : 'true', 109 'G_DEBUG' : 'fatal_criticals', 110 'LD_PRELOAD' : os.path.join(self.autodir, 111 "deps/fakegudev/lib", 112 "libfakegudev.so") } 113 self.modemmanager = subprocess.Popen(['/usr/sbin/modem-manager', 114 '--debug', 115 '--log-level=DEBUG', 116 '--log-file=/tmp/mm-log'], 117 env=environment) 118 time.sleep(3) # wait for DeviceAdded signal? 119 self.modemmanager.poll() 120 if self.modemmanager.returncode is not None: 121 self.modemmanager = None 122 raise error.TestFail("ModemManager quit early") 123 124 # wait for MM to stabilize? 125 return modem.ModemManager(provider='org.freedesktop') 126 127 def _stop_fake_network(self): 128 if self.fakenet_process: 129 self.fakenet_process.poll() 130 if self.fakenet_process.returncode is None: 131 self.fakenet_process.terminate() 132 self.fakenet_process.wait() 133 134 def _stop_fake_modem(self): 135 if self.fakemodem_process: 136 self.fakemodem_process.poll() 137 if self.fakemodem_process.returncode is None: 138 self.fakemodem_process.terminate() 139 self.fakemodem_process.wait() 140 141 def _stop_modemmanager(self): 142 if self.modemmanager: 143 self.modemmanager.poll() 144 if self.modemmanager.returncode is None: 145 self.modemmanager.terminate() 146 self.modemmanager.wait() 147 148 149 def __enter__(self): 150 fakenetname = self._start_fake_network() 151 fakemodemname = self._start_fake_modem(self.modem_pattern_files) 152 self.mm = self._start_modemmanager(fakenetname, fakemodemname) 153 # This would be better handled by listening for DeviceAdded, but 154 # since we've blocked everything else and only supplied data for 155 # one modem, it's going to be right 156 self.modem_object_path = self.mm.path + '/Modems/0' 157 return self 158 159 def __exit__(self, exception, value, traceback): 160 self._stop_modemmanager() 161 self._stop_fake_modem() 162 self._stop_fake_network() 163 return False 164
