def connect(self, dialtone_check=True):
"""Use pppd to connect to the network."""
# Modem is not connected if _pppd_pid is set to None.
if not self._pppd_pid:
data_port = self.data_port
data_port.open()
data_port.write(b'ATZ\r\n')
data_port.return_data()
if not dialtone_check:
data_port.write(b'ATX3\r\n')
data_port.return_data()
data_port.write(('ATDT%s\r\n' % self._dial_num).encode())
data_port.readline()
status = data_port.readline()
if status.startswith('CONNECT'):
pppd_args = [defaults.PPPD_PATH, self.baudrate,
self.data_port.port] + self.pppd_params
pid = os.fork()
if pid:
self._pppd_pid = pid
else:
try:
os.execv(defaults.PPPD_PATH, pppd_args)
except:
raise errors.PppdError('An error while starting pppd.')
else:
last_pppd_result = os.waitpid(self._pppd_pid, os.WNOHANG)
if last_pppd_result != (0, 0):
# Reconnect.
self._pppd_pid = None
self.connect(dialtone_check)
else:
# Modem already connected.
raise errors.HumodUsageError('Modem already connected.')
def disconnect(self):
"""Disconnect the modem."""
if self._pppd_pid:
os.kill(self._pppd_pid, 15)
os.waitpid(self._pppd_pid, 0)
self._pppd_pid = None
else:
raise errors.HumodUsageError('Not connected.')
def stop(self):
"""Stop the prober."""
if self._feeder:
self._stop_interpreter()
self._feeder.stop()
self._feeder = None
else:
raise errors.HumodUsageError('Prober not started.')
def start(self, patterns=None):
"""Start the prober.
Starts two threads, an instance of QueueFeeder and Interpreter.
"""
self.patterns = patterns
if not patterns:
self.patterns = actions.STANDARD_ACTIONS
if self._feeder:
raise errors.HumodUsageError('Prober already started.')
else:
self._feeder = QueueFeeder(self.queue, self.modem.ctrl_port,
self.modem.ctrl_lock)
self._feeder.start()
self._start_interpreter()